From eeecb1baab2f380e29d9f7bc1b077fb763b57507 Mon Sep 17 00:00:00 2001 From: ansuz Date: Mon, 20 Mar 2017 18:01:13 +0100 Subject: [PATCH] Make Canvas Work Again --- .jshintignore | 1 + www/examples/canvas/fabric.js | 26125 ++++++++++++++++++++++++++++++++ www/examples/canvas/main.js | 41 +- 3 files changed, 26153 insertions(+), 14 deletions(-) create mode 100644 www/examples/canvas/fabric.js diff --git a/.jshintignore b/.jshintignore index ae60d4ba0..204535ea7 100644 --- a/.jshintignore +++ b/.jshintignore @@ -4,6 +4,7 @@ www/code/codemirror* www/common/chainpad.js storage/kad.js www/common/otaml.js +www/examples/canvas/fabric.js server.js NetFluxWebsocketSrv.js diff --git a/www/examples/canvas/fabric.js b/www/examples/canvas/fabric.js new file mode 100644 index 000000000..4c885f95f --- /dev/null +++ b/www/examples/canvas/fabric.js @@ -0,0 +1,26125 @@ +/* build: `node build.js modules=ALL exclude=json,gestures minifier=uglifyjs` */ + /*! Fabric.js Copyright 2008-2015, Printio (Juriy Zaytsev, Maxim Chernyak) */ + +var fabric = fabric || { version: "1.6.7" }; +if (typeof exports !== 'undefined') { + exports.fabric = fabric; +} + +if (typeof document !== 'undefined' && typeof window !== 'undefined') { + fabric.document = document; + fabric.window = window; + // ensure globality even if entire library were function wrapped (as in Meteor.js packaging system) + window.fabric = fabric; +} +else { + // assume we're running under node.js when document/window are not present + fabric.document = require("jsdom") + .jsdom(""); + + if (fabric.document.createWindow) { + fabric.window = fabric.document.createWindow(); + } else { + fabric.window = fabric.document.parentWindow; + } +} + +/** + * True when in environment that supports touch events + * @type boolean + */ +fabric.isTouchSupported = "ontouchstart" in fabric.document.documentElement; + +/** + * True when in environment that's probably Node.js + * @type boolean + */ +fabric.isLikelyNode = typeof Buffer !== 'undefined' && + typeof window === 'undefined'; + +/* _FROM_SVG_START_ */ +/** + * Attributes parsed from all SVG elements + * @type array + */ +fabric.SHARED_ATTRIBUTES = [ + "display", + "transform", + "fill", "fill-opacity", "fill-rule", + "opacity", + "stroke", "stroke-dasharray", "stroke-linecap", + "stroke-linejoin", "stroke-miterlimit", + "stroke-opacity", "stroke-width", + "id" +]; +/* _FROM_SVG_END_ */ + +/** + * Pixel per Inch as a default value set to 96. Can be changed for more realistic conversion. + */ +fabric.DPI = 96; +fabric.reNum = '(?:[-+]?(?:\\d+|\\d*\\.\\d+)(?:e[-+]?\\d+)?)'; +fabric.fontPaths = { }; + +/** + * Cache Object for widths of chars in text rendering. + */ +fabric.charWidthsCache = { }; + +/** + * Device Pixel Ratio + * @see https://developer.apple.com/library/safari/documentation/AudioVideo/Conceptual/HTML-canvas-guide/SettingUptheCanvas/SettingUptheCanvas.html + */ +fabric.devicePixelRatio = fabric.window.devicePixelRatio || + fabric.window.webkitDevicePixelRatio || + fabric.window.mozDevicePixelRatio || + 1; + + +(function() { + + /** + * @private + * @param {String} eventName + * @param {Function} handler + */ + function _removeEventListener(eventName, handler) { + if (!this.__eventListeners[eventName]) { + return; + } + var eventListener = this.__eventListeners[eventName]; + if (handler) { + eventListener[eventListener.indexOf(handler)] = false; + } + else { + fabric.util.array.fill(eventListener, false); + } + } + + /** + * Observes specified event + * @deprecated `observe` deprecated since 0.8.34 (use `on` instead) + * @memberOf fabric.Observable + * @alias on + * @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler}) + * @param {Function} handler Function that receives a notification when an event of the specified type occurs + * @return {Self} thisArg + * @chainable + */ + function observe(eventName, handler) { + if (!this.__eventListeners) { + this.__eventListeners = { }; + } + // one object with key/value pairs was passed + if (arguments.length === 1) { + for (var prop in eventName) { + this.on(prop, eventName[prop]); + } + } + else { + if (!this.__eventListeners[eventName]) { + this.__eventListeners[eventName] = []; + } + this.__eventListeners[eventName].push(handler); + } + return this; + } + + /** + * Stops event observing for a particular event handler. Calling this method + * without arguments removes all handlers for all events + * @deprecated `stopObserving` deprecated since 0.8.34 (use `off` instead) + * @memberOf fabric.Observable + * @alias off + * @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler}) + * @param {Function} handler Function to be deleted from EventListeners + * @return {Self} thisArg + * @chainable + */ + function stopObserving(eventName, handler) { + if (!this.__eventListeners) { + return; + } + + // remove all key/value pairs (event name -> event handler) + if (arguments.length === 0) { + for (eventName in this.__eventListeners) { + _removeEventListener.call(this, eventName); + } + } + // one object with key/value pairs was passed + else if (arguments.length === 1 && typeof arguments[0] === 'object') { + for (var prop in eventName) { + _removeEventListener.call(this, prop, eventName[prop]); + } + } + else { + _removeEventListener.call(this, eventName, handler); + } + return this; + } + + /** + * Fires event with an optional options object + * @deprecated `fire` deprecated since 1.0.7 (use `trigger` instead) + * @memberOf fabric.Observable + * @alias trigger + * @param {String} eventName Event name to fire + * @param {Object} [options] Options object + * @return {Self} thisArg + * @chainable + */ + function fire(eventName, options) { + if (!this.__eventListeners) { + return; + } + + var listenersForEvent = this.__eventListeners[eventName]; + if (!listenersForEvent) { + return; + } + + for (var i = 0, len = listenersForEvent.length; i < len; i++) { + listenersForEvent[i] && listenersForEvent[i].call(this, options || { }); + } + this.__eventListeners[eventName] = listenersForEvent.filter(function(value) { + return value !== false; + }); + return this; + } + + /** + * @namespace fabric.Observable + * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#events} + * @see {@link http://fabricjs.com/events|Events demo} + */ + fabric.Observable = { + observe: observe, + stopObserving: stopObserving, + fire: fire, + + on: observe, + off: stopObserving, + trigger: fire + }; +})(); + + +/** + * @namespace fabric.Collection + */ +fabric.Collection = { + + _objects: [], + + /** + * Adds objects to collection, Canvas or Group, then renders canvas + * (if `renderOnAddRemove` is not `false`). + * in case of Group no changes to bounding box are made. + * Objects should be instances of (or inherit from) fabric.Object + * @param {...fabric.Object} object Zero or more fabric instances + * @return {Self} thisArg + * @chainable + */ + add: function () { + this._objects.push.apply(this._objects, arguments); + if (this._onObjectAdded) { + for (var i = 0, length = arguments.length; i < length; i++) { + this._onObjectAdded(arguments[i]); + } + } + this.renderOnAddRemove && this.renderAll(); + return this; + }, + + /** + * Inserts an object into collection at specified index, then renders canvas (if `renderOnAddRemove` is not `false`) + * An object should be an instance of (or inherit from) fabric.Object + * @param {Object} object Object to insert + * @param {Number} index Index to insert object at + * @param {Boolean} nonSplicing When `true`, no splicing (shifting) of objects occurs + * @return {Self} thisArg + * @chainable + */ + insertAt: function (object, index, nonSplicing) { + var objects = this.getObjects(); + if (nonSplicing) { + objects[index] = object; + } + else { + objects.splice(index, 0, object); + } + this._onObjectAdded && this._onObjectAdded(object); + this.renderOnAddRemove && this.renderAll(); + return this; + }, + + /** + * Removes objects from a collection, then renders canvas (if `renderOnAddRemove` is not `false`) + * @param {...fabric.Object} object Zero or more fabric instances + * @return {Self} thisArg + * @chainable + */ + remove: function() { + var objects = this.getObjects(), + index, somethingRemoved = false; + + for (var i = 0, length = arguments.length; i < length; i++) { + index = objects.indexOf(arguments[i]); + + // only call onObjectRemoved if an object was actually removed + if (index !== -1) { + somethingRemoved = true; + objects.splice(index, 1); + this._onObjectRemoved && this._onObjectRemoved(arguments[i]); + } + } + + this.renderOnAddRemove && somethingRemoved && this.renderAll(); + return this; + }, + + /** + * Executes given function for each object in this group + * @param {Function} callback + * Callback invoked with current object as first argument, + * index - as second and an array of all objects - as third. + * Callback is invoked in a context of Global Object (e.g. `window`) + * when no `context` argument is given + * + * @param {Object} context Context (aka thisObject) + * @return {Self} thisArg + * @chainable + */ + forEachObject: function(callback, context) { + var objects = this.getObjects(); + for (var i = 0, len = objects.length; i < len; i++) { + callback.call(context, objects[i], i, objects); + } + return this; + }, + + /** + * Returns an array of children objects of this instance + * Type parameter introduced in 1.3.10 + * @param {String} [type] When specified, only objects of this type are returned + * @return {Array} + */ + getObjects: function(type) { + if (typeof type === 'undefined') { + return this._objects; + } + return this._objects.filter(function(o) { + return o.type === type; + }); + }, + + /** + * Returns object at specified index + * @param {Number} index + * @return {Self} thisArg + */ + item: function (index) { + return this.getObjects()[index]; + }, + + /** + * Returns true if collection contains no objects + * @return {Boolean} true if collection is empty + */ + isEmpty: function () { + return this.getObjects().length === 0; + }, + + /** + * Returns a size of a collection (i.e: length of an array containing its objects) + * @return {Number} Collection size + */ + size: function() { + return this.getObjects().length; + }, + + /** + * Returns true if collection contains an object + * @param {Object} object Object to check against + * @return {Boolean} `true` if collection contains an object + */ + contains: function(object) { + return this.getObjects().indexOf(object) > -1; + }, + + /** + * Returns number representation of a collection complexity + * @return {Number} complexity + */ + complexity: function () { + return this.getObjects().reduce(function (memo, current) { + memo += current.complexity ? current.complexity() : 0; + return memo; + }, 0); + } +}; + + +(function(global) { + + var sqrt = Math.sqrt, + atan2 = Math.atan2, + pow = Math.pow, + abs = Math.abs, + PiBy180 = Math.PI / 180; + + /** + * @namespace fabric.util + */ + fabric.util = { + + /** + * Removes value from an array. + * Presence of value (and its position in an array) is determined via `Array.prototype.indexOf` + * @static + * @memberOf fabric.util + * @param {Array} array + * @param {*} value + * @return {Array} original array + */ + removeFromArray: function(array, value) { + var idx = array.indexOf(value); + if (idx !== -1) { + array.splice(idx, 1); + } + return array; + }, + + /** + * Returns random number between 2 specified ones. + * @static + * @memberOf fabric.util + * @param {Number} min lower limit + * @param {Number} max upper limit + * @return {Number} random value (between min and max) + */ + getRandomInt: function(min, max) { + return Math.floor(Math.random() * (max - min + 1)) + min; + }, + + /** + * Transforms degrees to radians. + * @static + * @memberOf fabric.util + * @param {Number} degrees value in degrees + * @return {Number} value in radians + */ + degreesToRadians: function(degrees) { + return degrees * PiBy180; + }, + + /** + * Transforms radians to degrees. + * @static + * @memberOf fabric.util + * @param {Number} radians value in radians + * @return {Number} value in degrees + */ + radiansToDegrees: function(radians) { + return radians / PiBy180; + }, + + /** + * Rotates `point` around `origin` with `radians` + * @static + * @memberOf fabric.util + * @param {fabric.Point} point The point to rotate + * @param {fabric.Point} origin The origin of the rotation + * @param {Number} radians The radians of the angle for the rotation + * @return {fabric.Point} The new rotated point + */ + rotatePoint: function(point, origin, radians) { + point.subtractEquals(origin); + var v = fabric.util.rotateVector(point, radians); + return new fabric.Point(v.x, v.y).addEquals(origin); + }, + + /** + * Rotates `vector` with `radians` + * @static + * @memberOf fabric.util + * @param {Object} vector The vector to rotate (x and y) + * @param {Number} radians The radians of the angle for the rotation + * @return {Object} The new rotated point + */ + rotateVector: function(vector, radians) { + var sin = Math.sin(radians), + cos = Math.cos(radians), + rx = vector.x * cos - vector.y * sin, + ry = vector.x * sin + vector.y * cos; + return { + x: rx, + y: ry + }; + }, + + /** + * Apply transform t to point p + * @static + * @memberOf fabric.util + * @param {fabric.Point} p The point to transform + * @param {Array} t The transform + * @param {Boolean} [ignoreOffset] Indicates that the offset should not be applied + * @return {fabric.Point} The transformed point + */ + transformPoint: function(p, t, ignoreOffset) { + if (ignoreOffset) { + return new fabric.Point( + t[0] * p.x + t[2] * p.y, + t[1] * p.x + t[3] * p.y + ); + } + return new fabric.Point( + t[0] * p.x + t[2] * p.y + t[4], + t[1] * p.x + t[3] * p.y + t[5] + ); + }, + + /** + * Returns coordinates of points's bounding rectangle (left, top, width, height) + * @param {Array} points 4 points array + * @return {Object} Object with left, top, width, height properties + */ + makeBoundingBoxFromPoints: function(points) { + var xPoints = [points[0].x, points[1].x, points[2].x, points[3].x], + minX = fabric.util.array.min(xPoints), + maxX = fabric.util.array.max(xPoints), + width = Math.abs(minX - maxX), + yPoints = [points[0].y, points[1].y, points[2].y, points[3].y], + minY = fabric.util.array.min(yPoints), + maxY = fabric.util.array.max(yPoints), + height = Math.abs(minY - maxY); + + return { + left: minX, + top: minY, + width: width, + height: height + }; + }, + + /** + * Invert transformation t + * @static + * @memberOf fabric.util + * @param {Array} t The transform + * @return {Array} The inverted transform + */ + invertTransform: function(t) { + var a = 1 / (t[0] * t[3] - t[1] * t[2]), + r = [a * t[3], -a * t[1], -a * t[2], a * t[0]], + o = fabric.util.transformPoint({ x: t[4], y: t[5] }, r, true); + r[4] = -o.x; + r[5] = -o.y; + return r; + }, + + /** + * A wrapper around Number#toFixed, which contrary to native method returns number, not string. + * @static + * @memberOf fabric.util + * @param {Number|String} number number to operate on + * @param {Number} fractionDigits number of fraction digits to "leave" + * @return {Number} + */ + toFixed: function(number, fractionDigits) { + return parseFloat(Number(number).toFixed(fractionDigits)); + }, + + /** + * Converts from attribute value to pixel value if applicable. + * Returns converted pixels or original value not converted. + * @param {Number|String} value number to operate on + * @param {Number} fontSize + * @return {Number|String} + */ + parseUnit: function(value, fontSize) { + var unit = /\D{0,2}$/.exec(value), + number = parseFloat(value); + if (!fontSize) { + fontSize = fabric.Text.DEFAULT_SVG_FONT_SIZE; + } + switch (unit[0]) { + case 'mm': + return number * fabric.DPI / 25.4; + + case 'cm': + return number * fabric.DPI / 2.54; + + case 'in': + return number * fabric.DPI; + + case 'pt': + return number * fabric.DPI / 72; // or * 4 / 3 + + case 'pc': + return number * fabric.DPI / 72 * 12; // or * 16 + + case 'em': + return number * fontSize; + + default: + return number; + } + }, + + /** + * Function which always returns `false`. + * @static + * @memberOf fabric.util + * @return {Boolean} + */ + falseFunction: function() { + return false; + }, + + /** + * Returns klass "Class" object of given namespace + * @memberOf fabric.util + * @param {String} type Type of object (eg. 'circle') + * @param {String} namespace Namespace to get klass "Class" object from + * @return {Object} klass "Class" + */ + getKlass: function(type, namespace) { + // capitalize first letter only + type = fabric.util.string.camelize(type.charAt(0).toUpperCase() + type.slice(1)); + return fabric.util.resolveNamespace(namespace)[type]; + }, + + /** + * Returns object of given namespace + * @memberOf fabric.util + * @param {String} namespace Namespace string e.g. 'fabric.Image.filter' or 'fabric' + * @return {Object} Object for given namespace (default fabric) + */ + resolveNamespace: function(namespace) { + if (!namespace) { + return fabric; + } + + var parts = namespace.split('.'), + len = parts.length, i, + obj = global || fabric.window; + + for (i = 0; i < len; ++i) { + obj = obj[parts[i]]; + } + + return obj; + }, + + /** + * Loads image element from given url and passes it to a callback + * @memberOf fabric.util + * @param {String} url URL representing an image + * @param {Function} callback Callback; invoked with loaded image + * @param {*} [context] Context to invoke callback in + * @param {Object} [crossOrigin] crossOrigin value to set image element to + */ + loadImage: function(url, callback, context, crossOrigin) { + if (!url) { + callback && callback.call(context, url); + return; + } + + var img = fabric.util.createImage(); + + /** @ignore */ + img.onload = function () { + callback && callback.call(context, img); + img = img.onload = img.onerror = null; + }; + + /** @ignore */ + img.onerror = function() { + fabric.log('Error loading ' + img.src); + callback && callback.call(context, null, true); + img = img.onload = img.onerror = null; + }; + + // data-urls appear to be buggy with crossOrigin + // https://github.com/kangax/fabric.js/commit/d0abb90f1cd5c5ef9d2a94d3fb21a22330da3e0a#commitcomment-4513767 + // see https://code.google.com/p/chromium/issues/detail?id=315152 + // https://bugzilla.mozilla.org/show_bug.cgi?id=935069 + if (url.indexOf('data') !== 0 && crossOrigin) { + img.crossOrigin = crossOrigin; + } + + img.src = url; + }, + + /** + * Creates corresponding fabric instances from their object representations + * @static + * @memberOf fabric.util + * @param {Array} objects Objects to enliven + * @param {Function} callback Callback to invoke when all objects are created + * @param {String} namespace Namespace to get klass "Class" object from + * @param {Function} reviver Method for further parsing of object elements, + * called after each fabric object created. + */ + enlivenObjects: function(objects, callback, namespace, reviver) { + objects = objects || []; + + function onLoaded() { + if (++numLoadedObjects === numTotalObjects) { + callback && callback(enlivenedObjects); + } + } + + var enlivenedObjects = [], + numLoadedObjects = 0, + numTotalObjects = objects.length; + + if (!numTotalObjects) { + callback && callback(enlivenedObjects); + return; + } + + objects.forEach(function (o, index) { + // if sparse array + if (!o || !o.type) { + onLoaded(); + return; + } + var klass = fabric.util.getKlass(o.type, namespace); + if (klass.async) { + klass.fromObject(o, function (obj, error) { + if (!error) { + enlivenedObjects[index] = obj; + reviver && reviver(o, enlivenedObjects[index]); + } + onLoaded(); + }); + } + else { + enlivenedObjects[index] = klass.fromObject(o); + reviver && reviver(o, enlivenedObjects[index]); + onLoaded(); + } + }); + }, + + /** + * Groups SVG elements (usually those retrieved from SVG document) + * @static + * @memberOf fabric.util + * @param {Array} elements SVG elements to group + * @param {Object} [options] Options object + * @param {String} path Value to set sourcePath to + * @return {fabric.Object|fabric.PathGroup} + */ + groupSVGElements: function(elements, options, path) { + var object; + + object = new fabric.PathGroup(elements, options); + + if (typeof path !== 'undefined') { + object.setSourcePath(path); + } + return object; + }, + + /** + * Populates an object with properties of another object + * @static + * @memberOf fabric.util + * @param {Object} source Source object + * @param {Object} destination Destination object + * @return {Array} properties Propertie names to include + */ + populateWithProperties: function(source, destination, properties) { + if (properties && Object.prototype.toString.call(properties) === '[object Array]') { + for (var i = 0, len = properties.length; i < len; i++) { + if (properties[i] in source) { + destination[properties[i]] = source[properties[i]]; + } + } + } + }, + + /** + * Draws a dashed line between two points + * + * This method is used to draw dashed line around selection area. + * See dotted stroke in canvas + * + * @param {CanvasRenderingContext2D} ctx context + * @param {Number} x start x coordinate + * @param {Number} y start y coordinate + * @param {Number} x2 end x coordinate + * @param {Number} y2 end y coordinate + * @param {Array} da dash array pattern + */ + drawDashedLine: function(ctx, x, y, x2, y2, da) { + var dx = x2 - x, + dy = y2 - y, + len = sqrt(dx * dx + dy * dy), + rot = atan2(dy, dx), + dc = da.length, + di = 0, + draw = true; + + ctx.save(); + ctx.translate(x, y); + ctx.moveTo(0, 0); + ctx.rotate(rot); + + x = 0; + while (len > x) { + x += da[di++ % dc]; + if (x > len) { + x = len; + } + ctx[draw ? 'lineTo' : 'moveTo'](x, 0); + draw = !draw; + } + + ctx.restore(); + }, + + /** + * Creates canvas element and initializes it via excanvas if necessary + * @static + * @memberOf fabric.util + * @param {CanvasElement} [canvasEl] optional canvas element to initialize; + * when not given, element is created implicitly + * @return {CanvasElement} initialized canvas element + */ + createCanvasElement: function(canvasEl) { + canvasEl || (canvasEl = fabric.document.createElement('canvas')); + /* eslint-disable camelcase */ + if (!canvasEl.getContext && typeof G_vmlCanvasManager !== 'undefined') { + G_vmlCanvasManager.initElement(canvasEl); + } + /* eslint-enable camelcase */ + return canvasEl; + }, + + /** + * Creates image element (works on client and node) + * @static + * @memberOf fabric.util + * @return {HTMLImageElement} HTML image element + */ + createImage: function() { + return fabric.isLikelyNode + ? new (require('canvas').Image)() + : fabric.document.createElement('img'); + }, + + /** + * Creates accessors (getXXX, setXXX) for a "class", based on "stateProperties" array + * @static + * @memberOf fabric.util + * @param {Object} klass "Class" to create accessors for + */ + createAccessors: function(klass) { + var proto = klass.prototype, i, propName, + capitalizedPropName, setterName, getterName; + + for (i = proto.stateProperties.length; i--; ) { + + propName = proto.stateProperties[i]; + capitalizedPropName = propName.charAt(0).toUpperCase() + propName.slice(1); + setterName = 'set' + capitalizedPropName; + getterName = 'get' + capitalizedPropName; + + // using `new Function` for better introspection + if (!proto[getterName]) { + proto[getterName] = (function(property) { + var that = this; + return function () { this.get(property); }; //return new Function('return this.get("' + property + '")'); + })(propName); + } + if (!proto[setterName]) { + proto[setterName] = (function(property) { + var that = this; + return function () { return this.get(property); }; // new Function('value', 'return this.set("' + property + '", value)'); + })(propName); + } + } + }, + + /** + * @static + * @memberOf fabric.util + * @param {fabric.Object} receiver Object implementing `clipTo` method + * @param {CanvasRenderingContext2D} ctx Context to clip + */ + clipContext: function(receiver, ctx) { + ctx.save(); + ctx.beginPath(); + receiver.clipTo(ctx); + ctx.clip(); + }, + + /** + * Multiply matrix A by matrix B to nest transformations + * @static + * @memberOf fabric.util + * @param {Array} a First transformMatrix + * @param {Array} b Second transformMatrix + * @param {Boolean} is2x2 flag to multiply matrices as 2x2 matrices + * @return {Array} The product of the two transform matrices + */ + multiplyTransformMatrices: function(a, b, is2x2) { + // Matrix multiply a * b + return [ + a[0] * b[0] + a[2] * b[1], + a[1] * b[0] + a[3] * b[1], + a[0] * b[2] + a[2] * b[3], + a[1] * b[2] + a[3] * b[3], + is2x2 ? 0 : a[0] * b[4] + a[2] * b[5] + a[4], + is2x2 ? 0 : a[1] * b[4] + a[3] * b[5] + a[5] + ]; + }, + + /** + * Decomposes standard 2x2 matrix into transform componentes + * @static + * @memberOf fabric.util + * @param {Array} a transformMatrix + * @return {Object} Components of transform + */ + qrDecompose: function(a) { + var angle = atan2(a[1], a[0]), + denom = pow(a[0], 2) + pow(a[1], 2), + scaleX = sqrt(denom), + scaleY = (a[0] * a[3] - a[2] * a [1]) / scaleX, + skewX = atan2(a[0] * a[2] + a[1] * a [3], denom); + return { + angle: angle / PiBy180, + scaleX: scaleX, + scaleY: scaleY, + skewX: skewX / PiBy180, + skewY: 0, + translateX: a[4], + translateY: a[5] + }; + }, + + customTransformMatrix: function(scaleX, scaleY, skewX) { + var skewMatrixX = [1, 0, abs(Math.tan(skewX * PiBy180)), 1], + scaleMatrix = [abs(scaleX), 0, 0, abs(scaleY)]; + return fabric.util.multiplyTransformMatrices(scaleMatrix, skewMatrixX, true); + }, + + resetObjectTransform: function (target) { + target.scaleX = 1; + target.scaleY = 1; + target.skewX = 0; + target.skewY = 0; + target.flipX = false; + target.flipY = false; + target.setAngle(0); + }, + + /** + * Returns string representation of function body + * @param {Function} fn Function to get body of + * @return {String} Function body + */ + getFunctionBody: function(fn) { + return (String(fn).match(/function[^{]*\{([\s\S]*)\}/) || {})[1]; + }, + + /** + * Returns true if context has transparent pixel + * at specified location (taking tolerance into account) + * @param {CanvasRenderingContext2D} ctx context + * @param {Number} x x coordinate + * @param {Number} y y coordinate + * @param {Number} tolerance Tolerance + */ + isTransparent: function(ctx, x, y, tolerance) { + + // If tolerance is > 0 adjust start coords to take into account. + // If moves off Canvas fix to 0 + if (tolerance > 0) { + if (x > tolerance) { + x -= tolerance; + } + else { + x = 0; + } + if (y > tolerance) { + y -= tolerance; + } + else { + y = 0; + } + } + + var _isTransparent = true, i, temp, + imageData = ctx.getImageData(x, y, (tolerance * 2) || 1, (tolerance * 2) || 1), + l = imageData.data.length; + + // Split image data - for tolerance > 1, pixelDataSize = 4; + for (i = 3; i < l; i += 4) { + temp = imageData.data[i]; + _isTransparent = temp <= 0; + if (_isTransparent === false) { + break; // Stop if colour found + } + } + + imageData = null; + + return _isTransparent; + }, + + /** + * Parse preserveAspectRatio attribute from element + * @param {string} attribute to be parsed + * @return {Object} an object containing align and meetOrSlice attribute + */ + parsePreserveAspectRatioAttribute: function(attribute) { + var meetOrSlice = 'meet', alignX = 'Mid', alignY = 'Mid', + aspectRatioAttrs = attribute.split(' '), align; + + if (aspectRatioAttrs && aspectRatioAttrs.length) { + meetOrSlice = aspectRatioAttrs.pop(); + if (meetOrSlice !== 'meet' && meetOrSlice !== 'slice') { + align = meetOrSlice; + meetOrSlice = 'meet'; + } + else if (aspectRatioAttrs.length) { + align = aspectRatioAttrs.pop(); + } + } + //divide align in alignX and alignY + alignX = align !== 'none' ? align.slice(1, 4) : 'none'; + alignY = align !== 'none' ? align.slice(5, 8) : 'none'; + return { + meetOrSlice: meetOrSlice, + alignX: alignX, + alignY: alignY + }; + }, + + /** + * Clear char widths cache for a font family. + * @memberOf fabric.util + * @param {String} [fontFamily] font family to clear + */ + clearFabricFontCache: function(fontFamily) { + if (!fontFamily) { + fabric.charWidthsCache = { }; + } + else if (fabric.charWidthsCache[fontFamily]) { + delete fabric.charWidthsCache[fontFamily]; + } + } + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function() { + + var arcToSegmentsCache = { }, + segmentToBezierCache = { }, + boundsOfCurveCache = { }, + _join = Array.prototype.join; + + /* Adapted from http://dxr.mozilla.org/mozilla-central/source/content/svg/content/src/nsSVGPathDataParser.cpp + * by Andrea Bogazzi code is under MPL. if you don't have a copy of the license you can take it here + * http://mozilla.org/MPL/2.0/ + */ + function arcToSegments(toX, toY, rx, ry, large, sweep, rotateX) { + var argsString = _join.call(arguments); + if (arcToSegmentsCache[argsString]) { + return arcToSegmentsCache[argsString]; + } + + var PI = Math.PI, th = rotateX * PI / 180, + sinTh = Math.sin(th), + cosTh = Math.cos(th), + fromX = 0, fromY = 0; + + rx = Math.abs(rx); + ry = Math.abs(ry); + + var px = -cosTh * toX * 0.5 - sinTh * toY * 0.5, + py = -cosTh * toY * 0.5 + sinTh * toX * 0.5, + rx2 = rx * rx, ry2 = ry * ry, py2 = py * py, px2 = px * px, + pl = rx2 * ry2 - rx2 * py2 - ry2 * px2, + root = 0; + + if (pl < 0) { + var s = Math.sqrt(1 - pl / (rx2 * ry2)); + rx *= s; + ry *= s; + } + else { + root = (large === sweep ? -1.0 : 1.0) * + Math.sqrt( pl / (rx2 * py2 + ry2 * px2)); + } + + var cx = root * rx * py / ry, + cy = -root * ry * px / rx, + cx1 = cosTh * cx - sinTh * cy + toX * 0.5, + cy1 = sinTh * cx + cosTh * cy + toY * 0.5, + mTheta = calcVectorAngle(1, 0, (px - cx) / rx, (py - cy) / ry), + dtheta = calcVectorAngle((px - cx) / rx, (py - cy) / ry, (-px - cx) / rx, (-py - cy) / ry); + + if (sweep === 0 && dtheta > 0) { + dtheta -= 2 * PI; + } + else if (sweep === 1 && dtheta < 0) { + dtheta += 2 * PI; + } + + // Convert into cubic bezier segments <= 90deg + var segments = Math.ceil(Math.abs(dtheta / PI * 2)), + result = [], mDelta = dtheta / segments, + mT = 8 / 3 * Math.sin(mDelta / 4) * Math.sin(mDelta / 4) / Math.sin(mDelta / 2), + th3 = mTheta + mDelta; + + for (var i = 0; i < segments; i++) { + result[i] = segmentToBezier(mTheta, th3, cosTh, sinTh, rx, ry, cx1, cy1, mT, fromX, fromY); + fromX = result[i][4]; + fromY = result[i][5]; + mTheta = th3; + th3 += mDelta; + } + arcToSegmentsCache[argsString] = result; + return result; + } + + function segmentToBezier(th2, th3, cosTh, sinTh, rx, ry, cx1, cy1, mT, fromX, fromY) { + var argsString2 = _join.call(arguments); + if (segmentToBezierCache[argsString2]) { + return segmentToBezierCache[argsString2]; + } + + var costh2 = Math.cos(th2), + sinth2 = Math.sin(th2), + costh3 = Math.cos(th3), + sinth3 = Math.sin(th3), + toX = cosTh * rx * costh3 - sinTh * ry * sinth3 + cx1, + toY = sinTh * rx * costh3 + cosTh * ry * sinth3 + cy1, + cp1X = fromX + mT * ( -cosTh * rx * sinth2 - sinTh * ry * costh2), + cp1Y = fromY + mT * ( -sinTh * rx * sinth2 + cosTh * ry * costh2), + cp2X = toX + mT * ( cosTh * rx * sinth3 + sinTh * ry * costh3), + cp2Y = toY + mT * ( sinTh * rx * sinth3 - cosTh * ry * costh3); + + segmentToBezierCache[argsString2] = [ + cp1X, cp1Y, + cp2X, cp2Y, + toX, toY + ]; + return segmentToBezierCache[argsString2]; + } + + /* + * Private + */ + function calcVectorAngle(ux, uy, vx, vy) { + var ta = Math.atan2(uy, ux), + tb = Math.atan2(vy, vx); + if (tb >= ta) { + return tb - ta; + } + else { + return 2 * Math.PI - (ta - tb); + } + } + + /** + * Draws arc + * @param {CanvasRenderingContext2D} ctx + * @param {Number} fx + * @param {Number} fy + * @param {Array} coords + */ + fabric.util.drawArc = function(ctx, fx, fy, coords) { + var rx = coords[0], + ry = coords[1], + rot = coords[2], + large = coords[3], + sweep = coords[4], + tx = coords[5], + ty = coords[6], + segs = [[], [], [], []], + segsNorm = arcToSegments(tx - fx, ty - fy, rx, ry, large, sweep, rot); + + for (var i = 0, len = segsNorm.length; i < len; i++) { + segs[i][0] = segsNorm[i][0] + fx; + segs[i][1] = segsNorm[i][1] + fy; + segs[i][2] = segsNorm[i][2] + fx; + segs[i][3] = segsNorm[i][3] + fy; + segs[i][4] = segsNorm[i][4] + fx; + segs[i][5] = segsNorm[i][5] + fy; + ctx.bezierCurveTo.apply(ctx, segs[i]); + } + }; + + /** + * Calculate bounding box of a elliptic-arc + * @param {Number} fx start point of arc + * @param {Number} fy + * @param {Number} rx horizontal radius + * @param {Number} ry vertical radius + * @param {Number} rot angle of horizontal axe + * @param {Number} large 1 or 0, whatever the arc is the big or the small on the 2 points + * @param {Number} sweep 1 or 0, 1 clockwise or counterclockwise direction + * @param {Number} tx end point of arc + * @param {Number} ty + */ + fabric.util.getBoundsOfArc = function(fx, fy, rx, ry, rot, large, sweep, tx, ty) { + + var fromX = 0, fromY = 0, bound, bounds = [], + segs = arcToSegments(tx - fx, ty - fy, rx, ry, large, sweep, rot); + + for (var i = 0, len = segs.length; i < len; i++) { + bound = getBoundsOfCurve(fromX, fromY, segs[i][0], segs[i][1], segs[i][2], segs[i][3], segs[i][4], segs[i][5]); + bounds.push({ x: bound[0].x + fx, y: bound[0].y + fy }); + bounds.push({ x: bound[1].x + fx, y: bound[1].y + fy }); + fromX = segs[i][4]; + fromY = segs[i][5]; + } + return bounds; + }; + + /** + * Calculate bounding box of a beziercurve + * @param {Number} x0 starting point + * @param {Number} y0 + * @param {Number} x1 first control point + * @param {Number} y1 + * @param {Number} x2 secondo control point + * @param {Number} y2 + * @param {Number} x3 end of beizer + * @param {Number} y3 + */ + // taken from http://jsbin.com/ivomiq/56/edit no credits available for that. + function getBoundsOfCurve(x0, y0, x1, y1, x2, y2, x3, y3) { + var argsString = _join.call(arguments); + if (boundsOfCurveCache[argsString]) { + return boundsOfCurveCache[argsString]; + } + + var sqrt = Math.sqrt, + min = Math.min, max = Math.max, + abs = Math.abs, tvalues = [], + bounds = [[], []], + a, b, c, t, t1, t2, b2ac, sqrtb2ac; + + b = 6 * x0 - 12 * x1 + 6 * x2; + a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3; + c = 3 * x1 - 3 * x0; + + for (var i = 0; i < 2; ++i) { + if (i > 0) { + b = 6 * y0 - 12 * y1 + 6 * y2; + a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3; + c = 3 * y1 - 3 * y0; + } + + if (abs(a) < 1e-12) { + if (abs(b) < 1e-12) { + continue; + } + t = -c / b; + if (0 < t && t < 1) { + tvalues.push(t); + } + continue; + } + b2ac = b * b - 4 * c * a; + if (b2ac < 0) { + continue; + } + sqrtb2ac = sqrt(b2ac); + t1 = (-b + sqrtb2ac) / (2 * a); + if (0 < t1 && t1 < 1) { + tvalues.push(t1); + } + t2 = (-b - sqrtb2ac) / (2 * a); + if (0 < t2 && t2 < 1) { + tvalues.push(t2); + } + } + + var x, y, j = tvalues.length, jlen = j, mt; + while (j--) { + t = tvalues[j]; + mt = 1 - t; + x = (mt * mt * mt * x0) + (3 * mt * mt * t * x1) + (3 * mt * t * t * x2) + (t * t * t * x3); + bounds[0][j] = x; + + y = (mt * mt * mt * y0) + (3 * mt * mt * t * y1) + (3 * mt * t * t * y2) + (t * t * t * y3); + bounds[1][j] = y; + } + + bounds[0][jlen] = x0; + bounds[1][jlen] = y0; + bounds[0][jlen + 1] = x3; + bounds[1][jlen + 1] = y3; + var result = [ + { + x: min.apply(null, bounds[0]), + y: min.apply(null, bounds[1]) + }, + { + x: max.apply(null, bounds[0]), + y: max.apply(null, bounds[1]) + } + ]; + boundsOfCurveCache[argsString] = result; + return result; + } + + fabric.util.getBoundsOfCurve = getBoundsOfCurve; + +})(); + + +(function() { + + var slice = Array.prototype.slice; + + /* _ES5_COMPAT_START_ */ + + if (!Array.prototype.indexOf) { + /** + * Finds index of an element in an array + * @param {*} searchElement + * @return {Number} + */ + Array.prototype.indexOf = function (searchElement /*, fromIndex */ ) { + if (this === void 0 || this === null) { + throw new TypeError(); + } + var t = Object(this), len = t.length >>> 0; + if (len === 0) { + return -1; + } + var n = 0; + if (arguments.length > 0) { + n = Number(arguments[1]); + if (n !== n) { // shortcut for verifying if it's NaN + n = 0; + } + else if (n !== 0 && n !== Number.POSITIVE_INFINITY && n !== Number.NEGATIVE_INFINITY) { + n = (n > 0 || -1) * Math.floor(Math.abs(n)); + } + } + if (n >= len) { + return -1; + } + var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0); + for (; k < len; k++) { + if (k in t && t[k] === searchElement) { + return k; + } + } + return -1; + }; + } + + if (!Array.prototype.forEach) { + /** + * Iterates an array, invoking callback for each element + * @param {Function} fn Callback to invoke for each element + * @param {Object} [context] Context to invoke callback in + * @return {Array} + */ + Array.prototype.forEach = function(fn, context) { + for (var i = 0, len = this.length >>> 0; i < len; i++) { + if (i in this) { + fn.call(context, this[i], i, this); + } + } + }; + } + + if (!Array.prototype.map) { + /** + * Returns a result of iterating over an array, invoking callback for each element + * @param {Function} fn Callback to invoke for each element + * @param {Object} [context] Context to invoke callback in + * @return {Array} + */ + Array.prototype.map = function(fn, context) { + var result = []; + for (var i = 0, len = this.length >>> 0; i < len; i++) { + if (i in this) { + result[i] = fn.call(context, this[i], i, this); + } + } + return result; + }; + } + + if (!Array.prototype.every) { + /** + * Returns true if a callback returns truthy value for all elements in an array + * @param {Function} fn Callback to invoke for each element + * @param {Object} [context] Context to invoke callback in + * @return {Boolean} + */ + Array.prototype.every = function(fn, context) { + for (var i = 0, len = this.length >>> 0; i < len; i++) { + if (i in this && !fn.call(context, this[i], i, this)) { + return false; + } + } + return true; + }; + } + + if (!Array.prototype.some) { + /** + * Returns true if a callback returns truthy value for at least one element in an array + * @param {Function} fn Callback to invoke for each element + * @param {Object} [context] Context to invoke callback in + * @return {Boolean} + */ + Array.prototype.some = function(fn, context) { + for (var i = 0, len = this.length >>> 0; i < len; i++) { + if (i in this && fn.call(context, this[i], i, this)) { + return true; + } + } + return false; + }; + } + + if (!Array.prototype.filter) { + /** + * Returns the result of iterating over elements in an array + * @param {Function} fn Callback to invoke for each element + * @param {Object} [context] Context to invoke callback in + * @return {Array} + */ + Array.prototype.filter = function(fn, context) { + var result = [], val; + for (var i = 0, len = this.length >>> 0; i < len; i++) { + if (i in this) { + val = this[i]; // in case fn mutates this + if (fn.call(context, val, i, this)) { + result.push(val); + } + } + } + return result; + }; + } + + if (!Array.prototype.reduce) { + /** + * Returns "folded" (reduced) result of iterating over elements in an array + * @param {Function} fn Callback to invoke for each element + * @return {*} + */ + Array.prototype.reduce = function(fn /*, initial*/) { + var len = this.length >>> 0, + i = 0, + rv; + + if (arguments.length > 1) { + rv = arguments[1]; + } + else { + do { + if (i in this) { + rv = this[i++]; + break; + } + // if array contains no values, no initial value to return + if (++i >= len) { + throw new TypeError(); + } + } + while (true); + } + for (; i < len; i++) { + if (i in this) { + rv = fn.call(null, rv, this[i], i, this); + } + } + return rv; + }; + } + + /* _ES5_COMPAT_END_ */ + + /** + * Invokes method on all items in a given array + * @memberOf fabric.util.array + * @param {Array} array Array to iterate over + * @param {String} method Name of a method to invoke + * @return {Array} + */ + function invoke(array, method) { + var args = slice.call(arguments, 2), result = []; + for (var i = 0, len = array.length; i < len; i++) { + result[i] = args.length ? array[i][method].apply(array[i], args) : array[i][method].call(array[i]); + } + return result; + } + + /** + * Finds maximum value in array (not necessarily "first" one) + * @memberOf fabric.util.array + * @param {Array} array Array to iterate over + * @param {String} byProperty + * @return {*} + */ + function max(array, byProperty) { + return find(array, byProperty, function(value1, value2) { + return value1 >= value2; + }); + } + + /** + * Finds minimum value in array (not necessarily "first" one) + * @memberOf fabric.util.array + * @param {Array} array Array to iterate over + * @param {String} byProperty + * @return {*} + */ + function min(array, byProperty) { + return find(array, byProperty, function(value1, value2) { + return value1 < value2; + }); + } + + /** + * @private + */ + function fill(array, value) { + var k = array.length; + while (k--) { + array[k] = value; + } + return array; + } + + /** + * @private + */ + function find(array, byProperty, condition) { + if (!array || array.length === 0) { + return; + } + + var i = array.length - 1, + result = byProperty ? array[i][byProperty] : array[i]; + if (byProperty) { + while (i--) { + if (condition(array[i][byProperty], result)) { + result = array[i][byProperty]; + } + } + } + else { + while (i--) { + if (condition(array[i], result)) { + result = array[i]; + } + } + } + return result; + } + + /** + * @namespace fabric.util.array + */ + fabric.util.array = { + fill: fill, + invoke: invoke, + min: min, + max: max + }; + +})(); + + +(function() { + /** + * Copies all enumerable properties of one object to another + * @memberOf fabric.util.object + * @param {Object} destination Where to copy to + * @param {Object} source Where to copy from + * @return {Object} + */ + + function extend(destination, source, deep) { + // JScript DontEnum bug is not taken care of + // the deep clone is for internal use, is not meant to avoid + // javascript traps or cloning html element or self referenced objects. + if (deep) { + if (!fabric.isLikelyNode && source instanceof Element) { + // avoid cloning deep images, canvases, + destination = source; + } + else if (source instanceof Array) { + destination = source.map(function(v) { + return clone(v, deep) + }) + } + else if (source instanceof Object) { + for (var property in source) { + destination[property] = clone(source[property], deep) + } + } + else { + // this sounds odd for an extend but is ok for recursive use + destination = source; + } + } + else { + for (var property in source) { + destination[property] = source[property]; + } + } + return destination; + } + + /** + * Creates an empty object and copies all enumerable properties of another object to it + * @memberOf fabric.util.object + * @param {Object} object Object to clone + * @return {Object} + */ + function clone(object, deep) { + return extend({ }, object, deep); + } + + /** @namespace fabric.util.object */ + fabric.util.object = { + extend: extend, + clone: clone + }; + +})(); + + +(function() { + + /* _ES5_COMPAT_START_ */ + if (!String.prototype.trim) { + /** + * Trims a string (removing whitespace from the beginning and the end) + * @function external:String#trim + * @see String#trim on MDN + */ + String.prototype.trim = function () { + // this trim is not fully ES3 or ES5 compliant, but it should cover most cases for now + return this.replace(/^[\s\xA0]+/, '').replace(/[\s\xA0]+$/, ''); + }; + } + /* _ES5_COMPAT_END_ */ + + /** + * Camelizes a string + * @memberOf fabric.util.string + * @param {String} string String to camelize + * @return {String} Camelized version of a string + */ + function camelize(string) { + return string.replace(/-+(.)?/g, function(match, character) { + return character ? character.toUpperCase() : ''; + }); + } + + /** + * Capitalizes a string + * @memberOf fabric.util.string + * @param {String} string String to capitalize + * @param {Boolean} [firstLetterOnly] If true only first letter is capitalized + * and other letters stay untouched, if false first letter is capitalized + * and other letters are converted to lowercase. + * @return {String} Capitalized version of a string + */ + function capitalize(string, firstLetterOnly) { + return string.charAt(0).toUpperCase() + + (firstLetterOnly ? string.slice(1) : string.slice(1).toLowerCase()); + } + + /** + * Escapes XML in a string + * @memberOf fabric.util.string + * @param {String} string String to escape + * @return {String} Escaped version of a string + */ + function escapeXml(string) { + return string.replace(/&/g, '&') + .replace(/"/g, '"') + .replace(/'/g, ''') + .replace(//g, '>'); + } + + /** + * String utilities + * @namespace fabric.util.string + */ + fabric.util.string = { + camelize: camelize, + capitalize: capitalize, + escapeXml: escapeXml + }; +})(); + + +/* _ES5_COMPAT_START_ */ +(function() { + + var slice = Array.prototype.slice, + apply = Function.prototype.apply, + Dummy = function() { }; + + if (!Function.prototype.bind) { + /** + * Cross-browser approximation of ES5 Function.prototype.bind (not fully spec conforming) + * @see Function#bind on MDN + * @param {Object} thisArg Object to bind function to + * @param {Any[]} Values to pass to a bound function + * @return {Function} + */ + Function.prototype.bind = function(thisArg) { + var _this = this, args = slice.call(arguments, 1), bound; + if (args.length) { + bound = function() { + return apply.call(_this, this instanceof Dummy ? this : thisArg, args.concat(slice.call(arguments))); + }; + } + else { + /** @ignore */ + bound = function() { + return apply.call(_this, this instanceof Dummy ? this : thisArg, arguments); + }; + } + Dummy.prototype = this.prototype; + bound.prototype = new Dummy(); + + return bound; + }; + } + +})(); +/* _ES5_COMPAT_END_ */ + + +(function() { + + var slice = Array.prototype.slice, emptyFunction = function() { }, + + IS_DONTENUM_BUGGY = (function() { + for (var p in { toString: 1 }) { + if (p === 'toString') { + return false; + } + } + return true; + })(), + + /** @ignore */ + addMethods = function(klass, source, parent) { + for (var property in source) { + + if (property in klass.prototype && + typeof klass.prototype[property] === 'function' && + (source[property] + '').indexOf('callSuper') > -1) { + + klass.prototype[property] = (function(property) { + return function() { + + var superclass = this.constructor.superclass; + this.constructor.superclass = parent; + var returnValue = source[property].apply(this, arguments); + this.constructor.superclass = superclass; + + if (property !== 'initialize') { + return returnValue; + } + }; + })(property); + } + else { + klass.prototype[property] = source[property]; + } + + if (IS_DONTENUM_BUGGY) { + if (source.toString !== Object.prototype.toString) { + klass.prototype.toString = source.toString; + } + if (source.valueOf !== Object.prototype.valueOf) { + klass.prototype.valueOf = source.valueOf; + } + } + } + }; + + function Subclass() { } + + function callSuper(methodName) { + var fn = this.constructor.superclass.prototype[methodName]; + return (arguments.length > 1) + ? fn.apply(this, slice.call(arguments, 1)) + : fn.call(this); + } + + /** + * Helper for creation of "classes". + * @memberOf fabric.util + * @param {Function} [parent] optional "Class" to inherit from + * @param {Object} [properties] Properties shared by all instances of this class + * (be careful modifying objects defined here as this would affect all instances) + */ + function createClass() { + var parent = null, + properties = slice.call(arguments, 0); + + if (typeof properties[0] === 'function') { + parent = properties.shift(); + } + function klass() { + this.initialize.apply(this, arguments); + } + + klass.superclass = parent; + klass.subclasses = []; + + if (parent) { + Subclass.prototype = parent.prototype; + klass.prototype = new Subclass(); + parent.subclasses.push(klass); + } + for (var i = 0, length = properties.length; i < length; i++) { + addMethods(klass, properties[i], parent); + } + if (!klass.prototype.initialize) { + klass.prototype.initialize = emptyFunction; + } + klass.prototype.constructor = klass; + klass.prototype.callSuper = callSuper; + return klass; + } + + fabric.util.createClass = createClass; +})(); + + +(function () { + + var unknown = 'unknown'; + + /* EVENT HANDLING */ + + function areHostMethods(object) { + var methodNames = Array.prototype.slice.call(arguments, 1), + t, i, len = methodNames.length; + for (i = 0; i < len; i++) { + t = typeof object[methodNames[i]]; + if (!(/^(?:function|object|unknown)$/).test(t)) { + return false; + } + } + return true; + } + + /** @ignore */ + var getElement, + setElement, + getUniqueId = (function () { + var uid = 0; + return function (element) { + return element.__uniqueID || (element.__uniqueID = 'uniqueID__' + uid++); + }; + })(); + + (function () { + var elements = { }; + /** @ignore */ + getElement = function (uid) { + return elements[uid]; + }; + /** @ignore */ + setElement = function (uid, element) { + elements[uid] = element; + }; + })(); + + function createListener(uid, handler) { + return { + handler: handler, + wrappedHandler: createWrappedHandler(uid, handler) + }; + } + + function createWrappedHandler(uid, handler) { + return function (e) { + handler.call(getElement(uid), e || fabric.window.event); + }; + } + + function createDispatcher(uid, eventName) { + return function (e) { + if (handlers[uid] && handlers[uid][eventName]) { + var handlersForEvent = handlers[uid][eventName]; + for (var i = 0, len = handlersForEvent.length; i < len; i++) { + handlersForEvent[i].call(this, e || fabric.window.event); + } + } + }; + } + + var shouldUseAddListenerRemoveListener = ( + areHostMethods(fabric.document.documentElement, 'addEventListener', 'removeEventListener') && + areHostMethods(fabric.window, 'addEventListener', 'removeEventListener')), + + shouldUseAttachEventDetachEvent = ( + areHostMethods(fabric.document.documentElement, 'attachEvent', 'detachEvent') && + areHostMethods(fabric.window, 'attachEvent', 'detachEvent')), + + // IE branch + listeners = { }, + + // DOM L0 branch + handlers = { }, + + addListener, removeListener; + + if (shouldUseAddListenerRemoveListener) { + /** @ignore */ + addListener = function (element, eventName, handler) { + element.addEventListener(eventName, handler, false); + }; + /** @ignore */ + removeListener = function (element, eventName, handler) { + element.removeEventListener(eventName, handler, false); + }; + } + + else if (shouldUseAttachEventDetachEvent) { + /** @ignore */ + addListener = function (element, eventName, handler) { + var uid = getUniqueId(element); + setElement(uid, element); + if (!listeners[uid]) { + listeners[uid] = { }; + } + if (!listeners[uid][eventName]) { + listeners[uid][eventName] = []; + + } + var listener = createListener(uid, handler); + listeners[uid][eventName].push(listener); + element.attachEvent('on' + eventName, listener.wrappedHandler); + }; + /** @ignore */ + removeListener = function (element, eventName, handler) { + var uid = getUniqueId(element), listener; + if (listeners[uid] && listeners[uid][eventName]) { + for (var i = 0, len = listeners[uid][eventName].length; i < len; i++) { + listener = listeners[uid][eventName][i]; + if (listener && listener.handler === handler) { + element.detachEvent('on' + eventName, listener.wrappedHandler); + listeners[uid][eventName][i] = null; + } + } + } + }; + } + else { + /** @ignore */ + addListener = function (element, eventName, handler) { + var uid = getUniqueId(element); + if (!handlers[uid]) { + handlers[uid] = { }; + } + if (!handlers[uid][eventName]) { + handlers[uid][eventName] = []; + var existingHandler = element['on' + eventName]; + if (existingHandler) { + handlers[uid][eventName].push(existingHandler); + } + element['on' + eventName] = createDispatcher(uid, eventName); + } + handlers[uid][eventName].push(handler); + }; + /** @ignore */ + removeListener = function (element, eventName, handler) { + var uid = getUniqueId(element); + if (handlers[uid] && handlers[uid][eventName]) { + var handlersForEvent = handlers[uid][eventName]; + for (var i = 0, len = handlersForEvent.length; i < len; i++) { + if (handlersForEvent[i] === handler) { + handlersForEvent.splice(i, 1); + } + } + } + }; + } + + /** + * Adds an event listener to an element + * @function + * @memberOf fabric.util + * @param {HTMLElement} element + * @param {String} eventName + * @param {Function} handler + */ + fabric.util.addListener = addListener; + + /** + * Removes an event listener from an element + * @function + * @memberOf fabric.util + * @param {HTMLElement} element + * @param {String} eventName + * @param {Function} handler + */ + fabric.util.removeListener = removeListener; + + /** + * Cross-browser wrapper for getting event's coordinates + * @memberOf fabric.util + * @param {Event} event Event object + */ + function getPointer(event) { + event || (event = fabric.window.event); + + var element = event.target || + (typeof event.srcElement !== unknown ? event.srcElement : null), + + scroll = fabric.util.getScrollLeftTop(element); + + return { + x: pointerX(event) + scroll.left, + y: pointerY(event) + scroll.top + }; + } + + var pointerX = function(event) { + // looks like in IE (<9) clientX at certain point (apparently when mouseup fires on VML element) + // is represented as COM object, with all the consequences, like "unknown" type and error on [[Get]] + // need to investigate later + return (typeof event.clientX !== unknown ? event.clientX : 0); + }, + + pointerY = function(event) { + return (typeof event.clientY !== unknown ? event.clientY : 0); + }; + + function _getPointer(event, pageProp, clientProp) { + var touchProp = event.type === 'touchend' ? 'changedTouches' : 'touches'; + + return (event[touchProp] && event[touchProp][0] + ? (event[touchProp][0][pageProp] - (event[touchProp][0][pageProp] - event[touchProp][0][clientProp])) + || event[clientProp] + : event[clientProp]); + } + + if (fabric.isTouchSupported) { + pointerX = function(event) { + return _getPointer(event, 'pageX', 'clientX'); + }; + pointerY = function(event) { + return _getPointer(event, 'pageY', 'clientY'); + }; + } + + fabric.util.getPointer = getPointer; + + fabric.util.object.extend(fabric.util, fabric.Observable); + +})(); + + +(function () { + + /** + * Cross-browser wrapper for setting element's style + * @memberOf fabric.util + * @param {HTMLElement} element + * @param {Object} styles + * @return {HTMLElement} Element that was passed as a first argument + */ + function setStyle(element, styles) { + var elementStyle = element.style; + if (!elementStyle) { + return element; + } + if (typeof styles === 'string') { + element.style.cssText += ';' + styles; + return styles.indexOf('opacity') > -1 + ? setOpacity(element, styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) + : element; + } + for (var property in styles) { + if (property === 'opacity') { + setOpacity(element, styles[property]); + } + else { + var normalizedProperty = (property === 'float' || property === 'cssFloat') + ? (typeof elementStyle.styleFloat === 'undefined' ? 'cssFloat' : 'styleFloat') + : property; + elementStyle[normalizedProperty] = styles[property]; + } + } + return element; + } + + var parseEl = fabric.document.createElement('div'), + supportsOpacity = typeof parseEl.style.opacity === 'string', + supportsFilters = typeof parseEl.style.filter === 'string', + reOpacity = /alpha\s*\(\s*opacity\s*=\s*([^\)]+)\)/, + + /** @ignore */ + setOpacity = function (element) { return element; }; + + if (supportsOpacity) { + /** @ignore */ + setOpacity = function(element, value) { + element.style.opacity = value; + return element; + }; + } + else if (supportsFilters) { + /** @ignore */ + setOpacity = function(element, value) { + var es = element.style; + if (element.currentStyle && !element.currentStyle.hasLayout) { + es.zoom = 1; + } + if (reOpacity.test(es.filter)) { + value = value >= 0.9999 ? '' : ('alpha(opacity=' + (value * 100) + ')'); + es.filter = es.filter.replace(reOpacity, value); + } + else { + es.filter += ' alpha(opacity=' + (value * 100) + ')'; + } + return element; + }; + } + + fabric.util.setStyle = setStyle; + +})(); + + +(function() { + + var _slice = Array.prototype.slice; + + /** + * Takes id and returns an element with that id (if one exists in a document) + * @memberOf fabric.util + * @param {String|HTMLElement} id + * @return {HTMLElement|null} + */ + function getById(id) { + return typeof id === 'string' ? fabric.document.getElementById(id) : id; + } + + var sliceCanConvertNodelists, + /** + * Converts an array-like object (e.g. arguments or NodeList) to an array + * @memberOf fabric.util + * @param {Object} arrayLike + * @return {Array} + */ + toArray = function(arrayLike) { + return _slice.call(arrayLike, 0); + }; + + try { + sliceCanConvertNodelists = toArray(fabric.document.childNodes) instanceof Array; + } + catch (err) { } + + if (!sliceCanConvertNodelists) { + toArray = function(arrayLike) { + var arr = new Array(arrayLike.length), i = arrayLike.length; + while (i--) { + arr[i] = arrayLike[i]; + } + return arr; + }; + } + + /** + * Creates specified element with specified attributes + * @memberOf fabric.util + * @param {String} tagName Type of an element to create + * @param {Object} [attributes] Attributes to set on an element + * @return {HTMLElement} Newly created element + */ + function makeElement(tagName, attributes) { + var el = fabric.document.createElement(tagName); + for (var prop in attributes) { + if (prop === 'class') { + el.className = attributes[prop]; + } + else if (prop === 'for') { + el.htmlFor = attributes[prop]; + } + else { + el.setAttribute(prop, attributes[prop]); + } + } + return el; + } + + /** + * Adds class to an element + * @memberOf fabric.util + * @param {HTMLElement} element Element to add class to + * @param {String} className Class to add to an element + */ + function addClass(element, className) { + if (element && (' ' + element.className + ' ').indexOf(' ' + className + ' ') === -1) { + element.className += (element.className ? ' ' : '') + className; + } + } + + /** + * Wraps element with another element + * @memberOf fabric.util + * @param {HTMLElement} element Element to wrap + * @param {HTMLElement|String} wrapper Element to wrap with + * @param {Object} [attributes] Attributes to set on a wrapper + * @return {HTMLElement} wrapper + */ + function wrapElement(element, wrapper, attributes) { + if (typeof wrapper === 'string') { + wrapper = makeElement(wrapper, attributes); + } + if (element.parentNode) { + element.parentNode.replaceChild(wrapper, element); + } + wrapper.appendChild(element); + return wrapper; + } + + /** + * Returns element scroll offsets + * @memberOf fabric.util + * @param {HTMLElement} element Element to operate on + * @return {Object} Object with left/top values + */ + function getScrollLeftTop(element) { + + var left = 0, + top = 0, + docElement = fabric.document.documentElement, + body = fabric.document.body || { + scrollLeft: 0, scrollTop: 0 + }; + + // While loop checks (and then sets element to) .parentNode OR .host + // to account for ShadowDOM. We still want to traverse up out of ShadowDOM, + // but the .parentNode of a root ShadowDOM node will always be null, instead + // it should be accessed through .host. See http://stackoverflow.com/a/24765528/4383938 + while (element && (element.parentNode || element.host)) { + + // Set element to element parent, or 'host' in case of ShadowDOM + element = element.parentNode || element.host; + + if (element === fabric.document) { + left = body.scrollLeft || docElement.scrollLeft || 0; + top = body.scrollTop || docElement.scrollTop || 0; + } + else { + left += element.scrollLeft || 0; + top += element.scrollTop || 0; + } + + if (element.nodeType === 1 && + fabric.util.getElementStyle(element, 'position') === 'fixed') { + break; + } + } + + return { left: left, top: top }; + } + + /** + * Returns offset for a given element + * @function + * @memberOf fabric.util + * @param {HTMLElement} element Element to get offset for + * @return {Object} Object with "left" and "top" properties + */ + function getElementOffset(element) { + var docElem, + doc = element && element.ownerDocument, + box = { left: 0, top: 0 }, + offset = { left: 0, top: 0 }, + scrollLeftTop, + offsetAttributes = { + borderLeftWidth: 'left', + borderTopWidth: 'top', + paddingLeft: 'left', + paddingTop: 'top' + }; + + if (!doc) { + return offset; + } + + for (var attr in offsetAttributes) { + offset[offsetAttributes[attr]] += parseInt(getElementStyle(element, attr), 10) || 0; + } + + docElem = doc.documentElement; + if ( typeof element.getBoundingClientRect !== 'undefined' ) { + box = element.getBoundingClientRect(); + } + + scrollLeftTop = getScrollLeftTop(element); + + return { + left: box.left + scrollLeftTop.left - (docElem.clientLeft || 0) + offset.left, + top: box.top + scrollLeftTop.top - (docElem.clientTop || 0) + offset.top + }; + } + + /** + * Returns style attribute value of a given element + * @memberOf fabric.util + * @param {HTMLElement} element Element to get style attribute for + * @param {String} attr Style attribute to get for element + * @return {String} Style attribute value of the given element. + */ + var getElementStyle; + if (fabric.document.defaultView && fabric.document.defaultView.getComputedStyle) { + getElementStyle = function(element, attr) { + var style = fabric.document.defaultView.getComputedStyle(element, null); + return style ? style[attr] : undefined; + }; + } + else { + getElementStyle = function(element, attr) { + var value = element.style[attr]; + if (!value && element.currentStyle) { + value = element.currentStyle[attr]; + } + return value; + }; + } + + (function () { + var style = fabric.document.documentElement.style, + selectProp = 'userSelect' in style + ? 'userSelect' + : 'MozUserSelect' in style + ? 'MozUserSelect' + : 'WebkitUserSelect' in style + ? 'WebkitUserSelect' + : 'KhtmlUserSelect' in style + ? 'KhtmlUserSelect' + : ''; + + /** + * Makes element unselectable + * @memberOf fabric.util + * @param {HTMLElement} element Element to make unselectable + * @return {HTMLElement} Element that was passed in + */ + function makeElementUnselectable(element) { + if (typeof element.onselectstart !== 'undefined') { + element.onselectstart = fabric.util.falseFunction; + } + if (selectProp) { + element.style[selectProp] = 'none'; + } + else if (typeof element.unselectable === 'string') { + element.unselectable = 'on'; + } + return element; + } + + /** + * Makes element selectable + * @memberOf fabric.util + * @param {HTMLElement} element Element to make selectable + * @return {HTMLElement} Element that was passed in + */ + function makeElementSelectable(element) { + if (typeof element.onselectstart !== 'undefined') { + element.onselectstart = null; + } + if (selectProp) { + element.style[selectProp] = ''; + } + else if (typeof element.unselectable === 'string') { + element.unselectable = ''; + } + return element; + } + + fabric.util.makeElementUnselectable = makeElementUnselectable; + fabric.util.makeElementSelectable = makeElementSelectable; + })(); + + (function() { + + /** + * Inserts a script element with a given url into a document; invokes callback, when that script is finished loading + * @memberOf fabric.util + * @param {String} url URL of a script to load + * @param {Function} callback Callback to execute when script is finished loading + */ + function getScript(url, callback) { + var headEl = fabric.document.getElementsByTagName('head')[0], + scriptEl = fabric.document.createElement('script'), + loading = true; + + /** @ignore */ + scriptEl.onload = /** @ignore */ scriptEl.onreadystatechange = function(e) { + if (loading) { + if (typeof this.readyState === 'string' && + this.readyState !== 'loaded' && + this.readyState !== 'complete') { + return; + } + loading = false; + callback(e || fabric.window.event); + scriptEl = scriptEl.onload = scriptEl.onreadystatechange = null; + } + }; + scriptEl.src = url; + headEl.appendChild(scriptEl); + // causes issue in Opera + // headEl.removeChild(scriptEl); + } + + fabric.util.getScript = getScript; + })(); + + fabric.util.getById = getById; + fabric.util.toArray = toArray; + fabric.util.makeElement = makeElement; + fabric.util.addClass = addClass; + fabric.util.wrapElement = wrapElement; + fabric.util.getScrollLeftTop = getScrollLeftTop; + fabric.util.getElementOffset = getElementOffset; + fabric.util.getElementStyle = getElementStyle; + +})(); + + +(function() { + + function addParamToUrl(url, param) { + return url + (/\?/.test(url) ? '&' : '?') + param; + } + + var makeXHR = (function() { + var factories = [ + function() { return new ActiveXObject('Microsoft.XMLHTTP'); }, + function() { return new ActiveXObject('Msxml2.XMLHTTP'); }, + function() { return new ActiveXObject('Msxml2.XMLHTTP.3.0'); }, + function() { return new XMLHttpRequest(); } + ]; + for (var i = factories.length; i--; ) { + try { + var req = factories[i](); + if (req) { + return factories[i]; + } + } + catch (err) { } + } + })(); + + function emptyFn() { } + + /** + * Cross-browser abstraction for sending XMLHttpRequest + * @memberOf fabric.util + * @param {String} url URL to send XMLHttpRequest to + * @param {Object} [options] Options object + * @param {String} [options.method="GET"] + * @param {String} [options.parameters] parameters to append to url in GET or in body + * @param {String} [options.body] body to send with POST or PUT request + * @param {Function} options.onComplete Callback to invoke when request is completed + * @return {XMLHttpRequest} request + */ + function request(url, options) { + + options || (options = { }); + + var method = options.method ? options.method.toUpperCase() : 'GET', + onComplete = options.onComplete || function() { }, + xhr = makeXHR(), + body = options.body || options.parameters; + + /** @ignore */ + xhr.onreadystatechange = function() { + if (xhr.readyState === 4) { + onComplete(xhr); + xhr.onreadystatechange = emptyFn; + } + }; + + if (method === 'GET') { + body = null; + if (typeof options.parameters === 'string') { + url = addParamToUrl(url, options.parameters); + } + } + + xhr.open(method, url, true); + + if (method === 'POST' || method === 'PUT') { + xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); + } + + xhr.send(body); + return xhr; + } + + fabric.util.request = request; +})(); + + +/** + * Wrapper around `console.log` (when available) + * @param {*} [values] Values to log + */ +fabric.log = function() { }; + +/** + * Wrapper around `console.warn` (when available) + * @param {*} [values] Values to log as a warning + */ +fabric.warn = function() { }; + +/* eslint-disable */ +if (typeof console !== 'undefined') { + + ['log', 'warn'].forEach(function(methodName) { + + if (typeof console[methodName] !== 'undefined' && + typeof console[methodName].apply === 'function') { + + fabric[methodName] = function() { + return console[methodName].apply(console, arguments); + }; + } + }); +} +/* eslint-enable */ + + +(function() { + + /** + * Changes value from one to another within certain period of time, invoking callbacks as value is being changed. + * @memberOf fabric.util + * @param {Object} [options] Animation options + * @param {Function} [options.onChange] Callback; invoked on every value change + * @param {Function} [options.onComplete] Callback; invoked when value change is completed + * @param {Number} [options.startValue=0] Starting value + * @param {Number} [options.endValue=100] Ending value + * @param {Number} [options.byValue=100] Value to modify the property by + * @param {Function} [options.easing] Easing function + * @param {Number} [options.duration=500] Duration of change (in ms) + */ + function animate(options) { + + requestAnimFrame(function(timestamp) { + options || (options = { }); + + var start = timestamp || +new Date(), + duration = options.duration || 500, + finish = start + duration, time, + onChange = options.onChange || function() { }, + abort = options.abort || function() { return false; }, + easing = options.easing || function(t, b, c, d) {return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;}, + startValue = 'startValue' in options ? options.startValue : 0, + endValue = 'endValue' in options ? options.endValue : 100, + byValue = options.byValue || endValue - startValue; + + options.onStart && options.onStart(); + + (function tick(ticktime) { + time = ticktime || +new Date(); + var currentTime = time > finish ? duration : (time - start); + if (abort()) { + options.onComplete && options.onComplete(); + return; + } + onChange(easing(currentTime, startValue, byValue, duration)); + if (time > finish) { + options.onComplete && options.onComplete(); + return; + } + requestAnimFrame(tick); + })(start); + }); + + } + + var _requestAnimFrame = fabric.window.requestAnimationFrame || + fabric.window.webkitRequestAnimationFrame || + fabric.window.mozRequestAnimationFrame || + fabric.window.oRequestAnimationFrame || + fabric.window.msRequestAnimationFrame || + function(callback) { + fabric.window.setTimeout(callback, 1000 / 60); + }; + + /** + * requestAnimationFrame polyfill based on http://paulirish.com/2011/requestanimationframe-for-smart-animating/ + * In order to get a precise start time, `requestAnimFrame` should be called as an entry into the method + * @memberOf fabric.util + * @param {Function} callback Callback to invoke + * @param {DOMElement} element optional Element to associate with animation + */ + function requestAnimFrame() { + return _requestAnimFrame.apply(fabric.window, arguments); + } + + fabric.util.animate = animate; + fabric.util.requestAnimFrame = requestAnimFrame; + +})(); + + +(function() { + + function normalize(a, c, p, s) { + if (a < Math.abs(c)) { + a = c; + s = p / 4; + } + else { + //handle the 0/0 case: + if (c === 0 && a === 0) { + s = p / (2 * Math.PI) * Math.asin(1); + } + else { + s = p / (2 * Math.PI) * Math.asin(c / a); + } + } + return { a: a, c: c, p: p, s: s }; + } + + function elastic(opts, t, d) { + return opts.a * + Math.pow(2, 10 * (t -= 1)) * + Math.sin( (t * d - opts.s) * (2 * Math.PI) / opts.p ); + } + + /** + * Cubic easing out + * @memberOf fabric.util.ease + */ + function easeOutCubic(t, b, c, d) { + return c * ((t = t / d - 1) * t * t + 1) + b; + } + + /** + * Cubic easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutCubic(t, b, c, d) { + t /= d / 2; + if (t < 1) { + return c / 2 * t * t * t + b; + } + return c / 2 * ((t -= 2) * t * t + 2) + b; + } + + /** + * Quartic easing in + * @memberOf fabric.util.ease + */ + function easeInQuart(t, b, c, d) { + return c * (t /= d) * t * t * t + b; + } + + /** + * Quartic easing out + * @memberOf fabric.util.ease + */ + function easeOutQuart(t, b, c, d) { + return -c * ((t = t / d - 1) * t * t * t - 1) + b; + } + + /** + * Quartic easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutQuart(t, b, c, d) { + t /= d / 2; + if (t < 1) { + return c / 2 * t * t * t * t + b; + } + return -c / 2 * ((t -= 2) * t * t * t - 2) + b; + } + + /** + * Quintic easing in + * @memberOf fabric.util.ease + */ + function easeInQuint(t, b, c, d) { + return c * (t /= d) * t * t * t * t + b; + } + + /** + * Quintic easing out + * @memberOf fabric.util.ease + */ + function easeOutQuint(t, b, c, d) { + return c * ((t = t / d - 1) * t * t * t * t + 1) + b; + } + + /** + * Quintic easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutQuint(t, b, c, d) { + t /= d / 2; + if (t < 1) { + return c / 2 * t * t * t * t * t + b; + } + return c / 2 * ((t -= 2) * t * t * t * t + 2) + b; + } + + /** + * Sinusoidal easing in + * @memberOf fabric.util.ease + */ + function easeInSine(t, b, c, d) { + return -c * Math.cos(t / d * (Math.PI / 2)) + c + b; + } + + /** + * Sinusoidal easing out + * @memberOf fabric.util.ease + */ + function easeOutSine(t, b, c, d) { + return c * Math.sin(t / d * (Math.PI / 2)) + b; + } + + /** + * Sinusoidal easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutSine(t, b, c, d) { + return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b; + } + + /** + * Exponential easing in + * @memberOf fabric.util.ease + */ + function easeInExpo(t, b, c, d) { + return (t === 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b; + } + + /** + * Exponential easing out + * @memberOf fabric.util.ease + */ + function easeOutExpo(t, b, c, d) { + return (t === d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b; + } + + /** + * Exponential easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutExpo(t, b, c, d) { + if (t === 0) { + return b; + } + if (t === d) { + return b + c; + } + t /= d / 2; + if (t < 1) { + return c / 2 * Math.pow(2, 10 * (t - 1)) + b; + } + return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b; + } + + /** + * Circular easing in + * @memberOf fabric.util.ease + */ + function easeInCirc(t, b, c, d) { + return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b; + } + + /** + * Circular easing out + * @memberOf fabric.util.ease + */ + function easeOutCirc(t, b, c, d) { + return c * Math.sqrt(1 - (t = t / d - 1) * t) + b; + } + + /** + * Circular easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutCirc(t, b, c, d) { + t /= d / 2; + if (t < 1) { + return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b; + } + return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b; + } + + /** + * Elastic easing in + * @memberOf fabric.util.ease + */ + function easeInElastic(t, b, c, d) { + var s = 1.70158, p = 0, a = c; + if (t === 0) { + return b; + } + t /= d; + if (t === 1) { + return b + c; + } + if (!p) { + p = d * 0.3; + } + var opts = normalize(a, c, p, s); + return -elastic(opts, t, d) + b; + } + + /** + * Elastic easing out + * @memberOf fabric.util.ease + */ + function easeOutElastic(t, b, c, d) { + var s = 1.70158, p = 0, a = c; + if (t === 0) { + return b; + } + t /= d; + if (t === 1) { + return b + c; + } + if (!p) { + p = d * 0.3; + } + var opts = normalize(a, c, p, s); + return opts.a * Math.pow(2, -10 * t) * Math.sin((t * d - opts.s) * (2 * Math.PI) / opts.p ) + opts.c + b; + } + + /** + * Elastic easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutElastic(t, b, c, d) { + var s = 1.70158, p = 0, a = c; + if (t === 0) { + return b; + } + t /= d / 2; + if (t === 2) { + return b + c; + } + if (!p) { + p = d * (0.3 * 1.5); + } + var opts = normalize(a, c, p, s); + if (t < 1) { + return -0.5 * elastic(opts, t, d) + b; + } + return opts.a * Math.pow(2, -10 * (t -= 1)) * + Math.sin((t * d - opts.s) * (2 * Math.PI) / opts.p ) * 0.5 + opts.c + b; + } + + /** + * Backwards easing in + * @memberOf fabric.util.ease + */ + function easeInBack(t, b, c, d, s) { + if (s === undefined) { + s = 1.70158; + } + return c * (t /= d) * t * ((s + 1) * t - s) + b; + } + + /** + * Backwards easing out + * @memberOf fabric.util.ease + */ + function easeOutBack(t, b, c, d, s) { + if (s === undefined) { + s = 1.70158; + } + return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b; + } + + /** + * Backwards easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutBack(t, b, c, d, s) { + if (s === undefined) { + s = 1.70158; + } + t /= d / 2; + if (t < 1) { + return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b; + } + return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b; + } + + /** + * Bouncing easing in + * @memberOf fabric.util.ease + */ + function easeInBounce(t, b, c, d) { + return c - easeOutBounce (d - t, 0, c, d) + b; + } + + /** + * Bouncing easing out + * @memberOf fabric.util.ease + */ + function easeOutBounce(t, b, c, d) { + if ((t /= d) < (1 / 2.75)) { + return c * (7.5625 * t * t) + b; + } + else if (t < (2 / 2.75)) { + return c * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75) + b; + } + else if (t < (2.5 / 2.75)) { + return c * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375) + b; + } + else { + return c * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375) + b; + } + } + + /** + * Bouncing easing in and out + * @memberOf fabric.util.ease + */ + function easeInOutBounce(t, b, c, d) { + if (t < d / 2) { + return easeInBounce (t * 2, 0, c, d) * 0.5 + b; + } + return easeOutBounce(t * 2 - d, 0, c, d) * 0.5 + c * 0.5 + b; + } + + /** + * Easing functions + * See Easing Equations by Robert Penner + * @namespace fabric.util.ease + */ + fabric.util.ease = { + + /** + * Quadratic easing in + * @memberOf fabric.util.ease + */ + easeInQuad: function(t, b, c, d) { + return c * (t /= d) * t + b; + }, + + /** + * Quadratic easing out + * @memberOf fabric.util.ease + */ + easeOutQuad: function(t, b, c, d) { + return -c * (t /= d) * (t - 2) + b; + }, + + /** + * Quadratic easing in and out + * @memberOf fabric.util.ease + */ + easeInOutQuad: function(t, b, c, d) { + t /= (d / 2); + if (t < 1) { + return c / 2 * t * t + b; + } + return -c / 2 * ((--t) * (t - 2) - 1) + b; + }, + + /** + * Cubic easing in + * @memberOf fabric.util.ease + */ + easeInCubic: function(t, b, c, d) { + return c * (t /= d) * t * t + b; + }, + + easeOutCubic: easeOutCubic, + easeInOutCubic: easeInOutCubic, + easeInQuart: easeInQuart, + easeOutQuart: easeOutQuart, + easeInOutQuart: easeInOutQuart, + easeInQuint: easeInQuint, + easeOutQuint: easeOutQuint, + easeInOutQuint: easeInOutQuint, + easeInSine: easeInSine, + easeOutSine: easeOutSine, + easeInOutSine: easeInOutSine, + easeInExpo: easeInExpo, + easeOutExpo: easeOutExpo, + easeInOutExpo: easeInOutExpo, + easeInCirc: easeInCirc, + easeOutCirc: easeOutCirc, + easeInOutCirc: easeInOutCirc, + easeInElastic: easeInElastic, + easeOutElastic: easeOutElastic, + easeInOutElastic: easeInOutElastic, + easeInBack: easeInBack, + easeOutBack: easeOutBack, + easeInOutBack: easeInOutBack, + easeInBounce: easeInBounce, + easeOutBounce: easeOutBounce, + easeInOutBounce: easeInOutBounce + }; + +})(); + + +(function(global) { + + 'use strict'; + + /** + * @name fabric + * @namespace + */ + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + capitalize = fabric.util.string.capitalize, + clone = fabric.util.object.clone, + toFixed = fabric.util.toFixed, + parseUnit = fabric.util.parseUnit, + multiplyTransformMatrices = fabric.util.multiplyTransformMatrices, + + reAllowedSVGTagNames = /^(path|circle|polygon|polyline|ellipse|rect|line|image|text)$/i, + reViewBoxTagNames = /^(symbol|image|marker|pattern|view|svg)$/i, + reNotAllowedAncestors = /^(?:pattern|defs|symbol|metadata)$/i, + reAllowedParents = /^(symbol|g|a|svg)$/i, + + attributesMap = { + cx: 'left', + x: 'left', + r: 'radius', + cy: 'top', + y: 'top', + display: 'visible', + visibility: 'visible', + transform: 'transformMatrix', + 'fill-opacity': 'fillOpacity', + 'fill-rule': 'fillRule', + 'font-family': 'fontFamily', + 'font-size': 'fontSize', + 'font-style': 'fontStyle', + 'font-weight': 'fontWeight', + 'stroke-dasharray': 'strokeDashArray', + 'stroke-linecap': 'strokeLineCap', + 'stroke-linejoin': 'strokeLineJoin', + 'stroke-miterlimit': 'strokeMiterLimit', + 'stroke-opacity': 'strokeOpacity', + 'stroke-width': 'strokeWidth', + 'text-decoration': 'textDecoration', + 'text-anchor': 'originX' + }, + + colorAttributes = { + stroke: 'strokeOpacity', + fill: 'fillOpacity' + }; + + fabric.cssRules = { }; + fabric.gradientDefs = { }; + + function normalizeAttr(attr) { + // transform attribute names + if (attr in attributesMap) { + return attributesMap[attr]; + } + return attr; + } + + function normalizeValue(attr, value, parentAttributes, fontSize) { + var isArray = Object.prototype.toString.call(value) === '[object Array]', + parsed; + + if ((attr === 'fill' || attr === 'stroke') && value === 'none') { + value = ''; + } + else if (attr === 'strokeDashArray') { + value = value.replace(/,/g, ' ').split(/\s+/).map(function(n) { + return parseFloat(n); + }); + } + else if (attr === 'transformMatrix') { + if (parentAttributes && parentAttributes.transformMatrix) { + value = multiplyTransformMatrices( + parentAttributes.transformMatrix, fabric.parseTransformAttribute(value)); + } + else { + value = fabric.parseTransformAttribute(value); + } + } + else if (attr === 'visible') { + value = (value === 'none' || value === 'hidden') ? false : true; + // display=none on parent element always takes precedence over child element + if (parentAttributes && parentAttributes.visible === false) { + value = false; + } + } + else if (attr === 'originX' /* text-anchor */) { + value = value === 'start' ? 'left' : value === 'end' ? 'right' : 'center'; + } + else { + parsed = isArray ? value.map(parseUnit) : parseUnit(value, fontSize); + } + + return (!isArray && isNaN(parsed) ? value : parsed); + } + + /** + * @private + * @param {Object} attributes Array of attributes to parse + */ + function _setStrokeFillOpacity(attributes) { + for (var attr in colorAttributes) { + + if (typeof attributes[colorAttributes[attr]] === 'undefined' || attributes[attr] === '') { + continue; + } + + if (typeof attributes[attr] === 'undefined') { + if (!fabric.Object.prototype[attr]) { + continue; + } + attributes[attr] = fabric.Object.prototype[attr]; + } + + if (attributes[attr].indexOf('url(') === 0) { + continue; + } + + var color = new fabric.Color(attributes[attr]); + attributes[attr] = color.setAlpha(toFixed(color.getAlpha() * attributes[colorAttributes[attr]], 2)).toRgba(); + } + return attributes; + } + + /** + * @private + */ + function _getMultipleNodes(doc, nodeNames) { + var nodeName, nodeArray = [], nodeList; + for (var i = 0; i < nodeNames.length; i++) { + nodeName = nodeNames[i]; + nodeList = doc.getElementsByTagName(nodeName); + nodeArray = nodeArray.concat(Array.prototype.slice.call(nodeList)); + } + return nodeArray; + } + + /** + * Parses "transform" attribute, returning an array of values + * @static + * @function + * @memberOf fabric + * @param {String} attributeValue String containing attribute value + * @return {Array} Array of 6 elements representing transformation matrix + */ + fabric.parseTransformAttribute = (function() { + function rotateMatrix(matrix, args) { + var angle = args[0], + x = (args.length === 3) ? args[1] : 0, + y = (args.length === 3) ? args[2] : 0; + + matrix[0] = Math.cos(angle); + matrix[1] = Math.sin(angle); + matrix[2] = -Math.sin(angle); + matrix[3] = Math.cos(angle); + matrix[4] = x - (matrix[0] * x + matrix[2] * y); + matrix[5] = y - (matrix[1] * x + matrix[3] * y); + } + + function scaleMatrix(matrix, args) { + var multiplierX = args[0], + multiplierY = (args.length === 2) ? args[1] : args[0]; + + matrix[0] = multiplierX; + matrix[3] = multiplierY; + } + + function skewXMatrix(matrix, args) { + matrix[2] = Math.tan(fabric.util.degreesToRadians(args[0])); + } + + function skewYMatrix(matrix, args) { + matrix[1] = Math.tan(fabric.util.degreesToRadians(args[0])); + } + + function translateMatrix(matrix, args) { + matrix[4] = args[0]; + if (args.length === 2) { + matrix[5] = args[1]; + } + } + + // identity matrix + var iMatrix = [ + 1, // a + 0, // b + 0, // c + 1, // d + 0, // e + 0 // f + ], + + // == begin transform regexp + number = fabric.reNum, + + commaWsp = '(?:\\s+,?\\s*|,\\s*)', + + skewX = '(?:(skewX)\\s*\\(\\s*(' + number + ')\\s*\\))', + + skewY = '(?:(skewY)\\s*\\(\\s*(' + number + ')\\s*\\))', + + rotate = '(?:(rotate)\\s*\\(\\s*(' + number + ')(?:' + + commaWsp + '(' + number + ')' + + commaWsp + '(' + number + '))?\\s*\\))', + + scale = '(?:(scale)\\s*\\(\\s*(' + number + ')(?:' + + commaWsp + '(' + number + '))?\\s*\\))', + + translate = '(?:(translate)\\s*\\(\\s*(' + number + ')(?:' + + commaWsp + '(' + number + '))?\\s*\\))', + + matrix = '(?:(matrix)\\s*\\(\\s*' + + '(' + number + ')' + commaWsp + + '(' + number + ')' + commaWsp + + '(' + number + ')' + commaWsp + + '(' + number + ')' + commaWsp + + '(' + number + ')' + commaWsp + + '(' + number + ')' + + '\\s*\\))', + + transform = '(?:' + + matrix + '|' + + translate + '|' + + scale + '|' + + rotate + '|' + + skewX + '|' + + skewY + + ')', + + transforms = '(?:' + transform + '(?:' + commaWsp + '*' + transform + ')*' + ')', + + transformList = '^\\s*(?:' + transforms + '?)\\s*$', + + // http://www.w3.org/TR/SVG/coords.html#TransformAttribute + reTransformList = new RegExp(transformList), + // == end transform regexp + + reTransform = new RegExp(transform, 'g'); + + return function(attributeValue) { + + // start with identity matrix + var matrix = iMatrix.concat(), + matrices = []; + + // return if no argument was given or + // an argument does not match transform attribute regexp + if (!attributeValue || (attributeValue && !reTransformList.test(attributeValue))) { + return matrix; + } + + attributeValue.replace(reTransform, function(match) { + + var m = new RegExp(transform).exec(match).filter(function (match) { + // match !== '' && match != null + return (!!match); + }), + operation = m[1], + args = m.slice(2).map(parseFloat); + + switch (operation) { + case 'translate': + translateMatrix(matrix, args); + break; + case 'rotate': + args[0] = fabric.util.degreesToRadians(args[0]); + rotateMatrix(matrix, args); + break; + case 'scale': + scaleMatrix(matrix, args); + break; + case 'skewX': + skewXMatrix(matrix, args); + break; + case 'skewY': + skewYMatrix(matrix, args); + break; + case 'matrix': + matrix = args; + break; + } + + // snapshot current matrix into matrices array + matrices.push(matrix.concat()); + // reset + matrix = iMatrix.concat(); + }); + + var combinedMatrix = matrices[0]; + while (matrices.length > 1) { + matrices.shift(); + combinedMatrix = fabric.util.multiplyTransformMatrices(combinedMatrix, matrices[0]); + } + return combinedMatrix; + }; + })(); + + /** + * @private + */ + function parseStyleString(style, oStyle) { + var attr, value; + style.replace(/;\s*$/, '').split(';').forEach(function (chunk) { + var pair = chunk.split(':'); + + attr = normalizeAttr(pair[0].trim().toLowerCase()); + value = normalizeValue(attr, pair[1].trim()); + + oStyle[attr] = value; + }); + } + + /** + * @private + */ + function parseStyleObject(style, oStyle) { + var attr, value; + for (var prop in style) { + if (typeof style[prop] === 'undefined') { + continue; + } + + attr = normalizeAttr(prop.toLowerCase()); + value = normalizeValue(attr, style[prop]); + + oStyle[attr] = value; + } + } + + /** + * @private + */ + function getGlobalStylesForElement(element, svgUid) { + var styles = { }; + for (var rule in fabric.cssRules[svgUid]) { + if (elementMatchesRule(element, rule.split(' '))) { + for (var property in fabric.cssRules[svgUid][rule]) { + styles[property] = fabric.cssRules[svgUid][rule][property]; + } + } + } + return styles; + } + + /** + * @private + */ + function elementMatchesRule(element, selectors) { + var firstMatching, parentMatching = true; + //start from rightmost selector. + firstMatching = selectorMatches(element, selectors.pop()); + if (firstMatching && selectors.length) { + parentMatching = doesSomeParentMatch(element, selectors); + } + return firstMatching && parentMatching && (selectors.length === 0); + } + + function doesSomeParentMatch(element, selectors) { + var selector, parentMatching = true; + while (element.parentNode && element.parentNode.nodeType === 1 && selectors.length) { + if (parentMatching) { + selector = selectors.pop(); + } + element = element.parentNode; + parentMatching = selectorMatches(element, selector); + } + return selectors.length === 0; + } + + /** + * @private + */ + function selectorMatches(element, selector) { + var nodeName = element.nodeName, + classNames = element.getAttribute('class'), + id = element.getAttribute('id'), matcher; + // i check if a selector matches slicing away part from it. + // if i get empty string i should match + matcher = new RegExp('^' + nodeName, 'i'); + selector = selector.replace(matcher, ''); + if (id && selector.length) { + matcher = new RegExp('#' + id + '(?![a-zA-Z\\-]+)', 'i'); + selector = selector.replace(matcher, ''); + } + if (classNames && selector.length) { + classNames = classNames.split(' '); + for (var i = classNames.length; i--;) { + matcher = new RegExp('\\.' + classNames[i] + '(?![a-zA-Z\\-]+)', 'i'); + selector = selector.replace(matcher, ''); + } + } + return selector.length === 0; + } + + /** + * @private + * to support IE8 missing getElementById on SVGdocument + */ + function elementById(doc, id) { + var el; + doc.getElementById && (el = doc.getElementById(id)); + if (el) { + return el; + } + var node, i, nodelist = doc.getElementsByTagName('*'); + for (i = 0; i < nodelist.length; i++) { + node = nodelist[i]; + if (id === node.getAttribute('id')) { + return node; + } + } + } + + /** + * @private + */ + function parseUseDirectives(doc) { + var nodelist = _getMultipleNodes(doc, ['use', 'svg:use']), i = 0; + + while (nodelist.length && i < nodelist.length) { + var el = nodelist[i], + xlink = el.getAttribute('xlink:href').substr(1), + x = el.getAttribute('x') || 0, + y = el.getAttribute('y') || 0, + el2 = elementById(doc, xlink).cloneNode(true), + currentTrans = (el2.getAttribute('transform') || '') + ' translate(' + x + ', ' + y + ')', + parentNode, oldLength = nodelist.length, attr, j, attrs, l; + + applyViewboxTransform(el2); + if (/^svg$/i.test(el2.nodeName)) { + var el3 = el2.ownerDocument.createElement('g'); + for (j = 0, attrs = el2.attributes, l = attrs.length; j < l; j++) { + attr = attrs.item(j); + el3.setAttribute(attr.nodeName, attr.nodeValue); + } + // el2.firstChild != null + while (el2.firstChild) { + el3.appendChild(el2.firstChild); + } + el2 = el3; + } + + for (j = 0, attrs = el.attributes, l = attrs.length; j < l; j++) { + attr = attrs.item(j); + if (attr.nodeName === 'x' || attr.nodeName === 'y' || attr.nodeName === 'xlink:href') { + continue; + } + + if (attr.nodeName === 'transform') { + currentTrans = attr.nodeValue + ' ' + currentTrans; + } + else { + el2.setAttribute(attr.nodeName, attr.nodeValue); + } + } + + el2.setAttribute('transform', currentTrans); + el2.setAttribute('instantiated_by_use', '1'); + el2.removeAttribute('id'); + parentNode = el.parentNode; + parentNode.replaceChild(el2, el); + // some browsers do not shorten nodelist after replaceChild (IE8) + if (nodelist.length === oldLength) { + i++; + } + } + } + + // http://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute + // matches, e.g.: +14.56e-12, etc. + var reViewBoxAttrValue = new RegExp( + '^' + + '\\s*(' + fabric.reNum + '+)\\s*,?' + + '\\s*(' + fabric.reNum + '+)\\s*,?' + + '\\s*(' + fabric.reNum + '+)\\s*,?' + + '\\s*(' + fabric.reNum + '+)\\s*' + + '$' + ); + + /** + * Add a element that envelop all child elements and makes the viewbox transformMatrix descend on all elements + */ + function applyViewboxTransform(element) { + + var viewBoxAttr = element.getAttribute('viewBox'), + scaleX = 1, + scaleY = 1, + minX = 0, + minY = 0, + viewBoxWidth, viewBoxHeight, matrix, el, + widthAttr = element.getAttribute('width'), + heightAttr = element.getAttribute('height'), + x = element.getAttribute('x') || 0, + y = element.getAttribute('y') || 0, + preserveAspectRatio = element.getAttribute('preserveAspectRatio') || '', + missingViewBox = (!viewBoxAttr || !reViewBoxTagNames.test(element.nodeName) + || !(viewBoxAttr = viewBoxAttr.match(reViewBoxAttrValue))), + missingDimAttr = (!widthAttr || !heightAttr || widthAttr === '100%' || heightAttr === '100%'), + toBeParsed = missingViewBox && missingDimAttr, + parsedDim = { }, translateMatrix = ''; + + parsedDim.width = 0; + parsedDim.height = 0; + parsedDim.toBeParsed = toBeParsed; + + if (toBeParsed) { + return parsedDim; + } + + if (missingViewBox) { + parsedDim.width = parseUnit(widthAttr); + parsedDim.height = parseUnit(heightAttr); + return parsedDim; + } + + minX = -parseFloat(viewBoxAttr[1]); + minY = -parseFloat(viewBoxAttr[2]); + viewBoxWidth = parseFloat(viewBoxAttr[3]); + viewBoxHeight = parseFloat(viewBoxAttr[4]); + + if (!missingDimAttr) { + parsedDim.width = parseUnit(widthAttr); + parsedDim.height = parseUnit(heightAttr); + scaleX = parsedDim.width / viewBoxWidth; + scaleY = parsedDim.height / viewBoxHeight; + } + else { + parsedDim.width = viewBoxWidth; + parsedDim.height = viewBoxHeight; + } + + // default is to preserve aspect ratio + preserveAspectRatio = fabric.util.parsePreserveAspectRatioAttribute(preserveAspectRatio); + if (preserveAspectRatio.alignX !== 'none') { + //translate all container for the effect of Mid, Min, Max + scaleY = scaleX = (scaleX > scaleY ? scaleY : scaleX); + } + + if (scaleX === 1 && scaleY === 1 && minX === 0 && minY === 0 && x === 0 && y === 0) { + return parsedDim; + } + + if (x || y) { + translateMatrix = ' translate(' + parseUnit(x) + ' ' + parseUnit(y) + ') '; + } + + matrix = translateMatrix + ' matrix(' + scaleX + + ' 0' + + ' 0 ' + + scaleY + ' ' + + (minX * scaleX) + ' ' + + (minY * scaleY) + ') '; + + if (element.nodeName === 'svg') { + el = element.ownerDocument.createElement('g'); + // element.firstChild != null + while (element.firstChild) { + el.appendChild(element.firstChild); + } + element.appendChild(el); + } + else { + el = element; + matrix = el.getAttribute('transform') + matrix; + } + + el.setAttribute('transform', matrix); + return parsedDim; + } + + /** + * Parses an SVG document, converts it to an array of corresponding fabric.* instances and passes them to a callback + * @static + * @function + * @memberOf fabric + * @param {SVGDocument} doc SVG document to parse + * @param {Function} callback Callback to call when parsing is finished; + * It's being passed an array of elements (parsed from a document). + * @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created. + */ + fabric.parseSVGDocument = (function() { + + function hasAncestorWithNodeName(element, nodeName) { + while (element && (element = element.parentNode)) { + if (element.nodeName && nodeName.test(element.nodeName.replace('svg:', '')) + && !element.getAttribute('instantiated_by_use')) { + return true; + } + } + return false; + } + + return function(doc, callback, reviver) { + if (!doc) { + return; + } + + parseUseDirectives(doc); + + var startTime = new Date(), + svgUid = fabric.Object.__uid++, + options = applyViewboxTransform(doc), + descendants = fabric.util.toArray(doc.getElementsByTagName('*')); + + options.svgUid = svgUid; + + if (descendants.length === 0 && fabric.isLikelyNode) { + // we're likely in node, where "o3-xml" library fails to gEBTN("*") + // https://github.com/ajaxorg/node-o3-xml/issues/21 + descendants = doc.selectNodes('//*[name(.)!="svg"]'); + var arr = []; + for (var i = 0, len = descendants.length; i < len; i++) { + arr[i] = descendants[i]; + } + descendants = arr; + } + + var elements = descendants.filter(function(el) { + applyViewboxTransform(el); + return reAllowedSVGTagNames.test(el.nodeName.replace('svg:', '')) && + !hasAncestorWithNodeName(el, reNotAllowedAncestors); // http://www.w3.org/TR/SVG/struct.html#DefsElement + }); + + if (!elements || (elements && !elements.length)) { + callback && callback([], {}); + return; + } + + fabric.gradientDefs[svgUid] = fabric.getGradientDefs(doc); + fabric.cssRules[svgUid] = fabric.getCSSRules(doc); + // Precedence of rules: style > class > attribute + fabric.parseElements(elements, function(instances) { + fabric.documentParsingTime = new Date() - startTime; + if (callback) { + callback(instances, options); + } + }, clone(options), reviver); + }; + })(); + + /** + * Used for caching SVG documents (loaded via `fabric.Canvas#loadSVGFromURL`) + * @namespace + */ + var svgCache = { + + /** + * @param {String} name + * @param {Function} callback + */ + has: function (name, callback) { + callback(false); + }, + + get: function () { + /* NOOP */ + }, + + set: function () { + /* NOOP */ + } + }; + + /** + * @private + */ + function _enlivenCachedObject(cachedObject) { + + var objects = cachedObject.objects, + options = cachedObject.options; + + objects = objects.map(function (o) { + return fabric[capitalize(o.type)].fromObject(o); + }); + + return ({ objects: objects, options: options }); + } + + /** + * @private + */ + function _createSVGPattern(markup, canvas, property) { + if (canvas[property] && canvas[property].toSVG) { + markup.push( + '\t\n', + '\t\t\n\t\n' + ); + } + } + + var reFontDeclaration = new RegExp( + '(normal|italic)?\\s*(normal|small-caps)?\\s*' + + '(normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900)?\\s*(' + + fabric.reNum + + '(?:px|cm|mm|em|pt|pc|in)*)(?:\\/(normal|' + fabric.reNum + '))?\\s+(.*)'); + + extend(fabric, { + /** + * Parses a short font declaration, building adding its properties to a style object + * @static + * @function + * @memberOf fabric + * @param {String} value font declaration + * @param {Object} oStyle definition + */ + parseFontDeclaration: function(value, oStyle) { + var match = value.match(reFontDeclaration); + + if (!match) { + return; + } + var fontStyle = match[1], + // font variant is not used + // fontVariant = match[2], + fontWeight = match[3], + fontSize = match[4], + lineHeight = match[5], + fontFamily = match[6]; + + if (fontStyle) { + oStyle.fontStyle = fontStyle; + } + if (fontWeight) { + oStyle.fontWeight = isNaN(parseFloat(fontWeight)) ? fontWeight : parseFloat(fontWeight); + } + if (fontSize) { + oStyle.fontSize = parseUnit(fontSize); + } + if (fontFamily) { + oStyle.fontFamily = fontFamily; + } + if (lineHeight) { + oStyle.lineHeight = lineHeight === 'normal' ? 1 : lineHeight; + } + }, + + /** + * Parses an SVG document, returning all of the gradient declarations found in it + * @static + * @function + * @memberOf fabric + * @param {SVGDocument} doc SVG document to parse + * @return {Object} Gradient definitions; key corresponds to element id, value -- to gradient definition element + */ + getGradientDefs: function(doc) { + var tagArray = [ + 'linearGradient', + 'radialGradient', + 'svg:linearGradient', + 'svg:radialGradient'], + elList = _getMultipleNodes(doc, tagArray), + el, j = 0, id, xlink, + gradientDefs = { }, idsToXlinkMap = { }; + + j = elList.length; + + while (j--) { + el = elList[j]; + xlink = el.getAttribute('xlink:href'); + id = el.getAttribute('id'); + if (xlink) { + idsToXlinkMap[id] = xlink.substr(1); + } + gradientDefs[id] = el; + } + + for (id in idsToXlinkMap) { + var el2 = gradientDefs[idsToXlinkMap[id]].cloneNode(true); + el = gradientDefs[id]; + while (el2.firstChild) { + el.appendChild(el2.firstChild); + } + } + return gradientDefs; + }, + + /** + * Returns an object of attributes' name/value, given element and an array of attribute names; + * Parses parent "g" nodes recursively upwards. + * @static + * @memberOf fabric + * @param {DOMElement} element Element to parse + * @param {Array} attributes Array of attributes to parse + * @return {Object} object containing parsed attributes' names/values + */ + parseAttributes: function(element, attributes, svgUid) { + + if (!element) { + return; + } + + var value, + parentAttributes = { }, + fontSize; + + if (typeof svgUid === 'undefined') { + svgUid = element.getAttribute('svgUid'); + } + // if there's a parent container (`g` or `a` or `symbol` node), parse its attributes recursively upwards + if (element.parentNode && reAllowedParents.test(element.parentNode.nodeName)) { + parentAttributes = fabric.parseAttributes(element.parentNode, attributes, svgUid); + } + fontSize = (parentAttributes && parentAttributes.fontSize ) || + element.getAttribute('font-size') || fabric.Text.DEFAULT_SVG_FONT_SIZE; + + var ownAttributes = attributes.reduce(function(memo, attr) { + value = element.getAttribute(attr); + if (value) { + attr = normalizeAttr(attr); + value = normalizeValue(attr, value, parentAttributes, fontSize); + + memo[attr] = value; + } + return memo; + }, { }); + + // add values parsed from style, which take precedence over attributes + // (see: http://www.w3.org/TR/SVG/styling.html#UsingPresentationAttributes) + ownAttributes = extend(ownAttributes, + extend(getGlobalStylesForElement(element, svgUid), fabric.parseStyleAttribute(element))); + if (ownAttributes.font) { + fabric.parseFontDeclaration(ownAttributes.font, ownAttributes); + } + return _setStrokeFillOpacity(extend(parentAttributes, ownAttributes)); + }, + + /** + * Transforms an array of svg elements to corresponding fabric.* instances + * @static + * @memberOf fabric + * @param {Array} elements Array of elements to parse + * @param {Function} callback Being passed an array of fabric instances (transformed from SVG elements) + * @param {Object} [options] Options object + * @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created. + */ + parseElements: function(elements, callback, options, reviver) { + new fabric.ElementsParser(elements, callback, options, reviver).parse(); + }, + + /** + * Parses "style" attribute, retuning an object with values + * @static + * @memberOf fabric + * @param {SVGElement} element Element to parse + * @return {Object} Objects with values parsed from style attribute of an element + */ + parseStyleAttribute: function(element) { + var oStyle = { }, + style = element.getAttribute('style'); + + if (!style) { + return oStyle; + } + + if (typeof style === 'string') { + parseStyleString(style, oStyle); + } + else { + parseStyleObject(style, oStyle); + } + + return oStyle; + }, + + /** + * Parses "points" attribute, returning an array of values + * @static + * @memberOf fabric + * @param {String} points points attribute string + * @return {Array} array of points + */ + parsePointsAttribute: function(points) { + + // points attribute is required and must not be empty + if (!points) { + return null; + } + + // replace commas with whitespace and remove bookending whitespace + points = points.replace(/,/g, ' ').trim(); + + points = points.split(/\s+/); + var parsedPoints = [], i, len; + + i = 0; + len = points.length; + for (; i < len; i += 2) { + parsedPoints.push({ + x: parseFloat(points[i]), + y: parseFloat(points[i + 1]) + }); + } + + // odd number of points is an error + // if (parsedPoints.length % 2 !== 0) { + // return null; + // } + + return parsedPoints; + }, + + /** + * Returns CSS rules for a given SVG document + * @static + * @function + * @memberOf fabric + * @param {SVGDocument} doc SVG document to parse + * @return {Object} CSS rules of this document + */ + getCSSRules: function(doc) { + var styles = doc.getElementsByTagName('style'), + allRules = { }, rules; + + // very crude parsing of style contents + for (var i = 0, len = styles.length; i < len; i++) { + // IE9 doesn't support textContent, but provides text instead. + var styleContents = styles[i].textContent || styles[i].text; + + // remove comments + styleContents = styleContents.replace(/\/\*[\s\S]*?\*\//g, ''); + if (styleContents.trim() === '') { + continue; + } + rules = styleContents.match(/[^{]*\{[\s\S]*?\}/g); + rules = rules.map(function(rule) { return rule.trim(); }); + rules.forEach(function(rule) { + + var match = rule.match(/([\s\S]*?)\s*\{([^}]*)\}/), + ruleObj = { }, declaration = match[2].trim(), + propertyValuePairs = declaration.replace(/;$/, '').split(/\s*;\s*/); + + for (var i = 0, len = propertyValuePairs.length; i < len; i++) { + var pair = propertyValuePairs[i].split(/\s*:\s*/), + property = normalizeAttr(pair[0]), + value = normalizeValue(property, pair[1], pair[0]); + ruleObj[property] = value; + } + rule = match[1]; + rule.split(',').forEach(function(_rule) { + _rule = _rule.replace(/^svg/i, '').trim(); + if (_rule === '') { + return; + } + if (allRules[_rule]) { + fabric.util.object.extend(allRules[_rule], ruleObj); + } + else { + allRules[_rule] = fabric.util.object.clone(ruleObj); + } + }); + }); + } + return allRules; + }, + + /** + * Takes url corresponding to an SVG document, and parses it into a set of fabric objects. + * Note that SVG is fetched via XMLHttpRequest, so it needs to conform to SOP (Same Origin Policy) + * @memberOf fabric + * @param {String} url + * @param {Function} callback + * @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created. + */ + loadSVGFromURL: function(url, callback, reviver) { + + url = url.replace(/^\n\s*/, '').trim(); + svgCache.has(url, function (hasUrl) { + if (hasUrl) { + svgCache.get(url, function (value) { + var enlivedRecord = _enlivenCachedObject(value); + callback(enlivedRecord.objects, enlivedRecord.options); + }); + } + else { + new fabric.util.request(url, { + method: 'get', + onComplete: onComplete + }); + } + }); + + function onComplete(r) { + + var xml = r.responseXML; + if (xml && !xml.documentElement && fabric.window.ActiveXObject && r.responseText) { + xml = new ActiveXObject('Microsoft.XMLDOM'); + xml.async = 'false'; + //IE chokes on DOCTYPE + xml.loadXML(r.responseText.replace(//i, '')); + } + if (!xml || !xml.documentElement) { + callback && callback(null); + } + + fabric.parseSVGDocument(xml.documentElement, function (results, options) { + svgCache.set(url, { + objects: fabric.util.array.invoke(results, 'toObject'), + options: options + }); + callback && callback(results, options); + }, reviver); + } + }, + + /** + * Takes string corresponding to an SVG document, and parses it into a set of fabric objects + * @memberOf fabric + * @param {String} string + * @param {Function} callback + * @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created. + */ + loadSVGFromString: function(string, callback, reviver) { + string = string.trim(); + var doc; + if (typeof DOMParser !== 'undefined') { + var parser = new DOMParser(); + if (parser && parser.parseFromString) { + doc = parser.parseFromString(string, 'text/xml'); + } + } + else if (fabric.window.ActiveXObject) { + doc = new ActiveXObject('Microsoft.XMLDOM'); + doc.async = 'false'; + // IE chokes on DOCTYPE + doc.loadXML(string.replace(//i, '')); + } + + fabric.parseSVGDocument(doc.documentElement, function (results, options) { + callback(results, options); + }, reviver); + }, + + /** + * Creates markup containing SVG font faces, + * font URLs for font faces must be collected by developers + * and are not extracted from the DOM by fabricjs + * @param {Array} objects Array of fabric objects + * @return {String} + */ + createSVGFontFacesMarkup: function(objects) { + var markup = '', fontList = { }, obj, fontFamily, + style, row, rowIndex, _char, charIndex, + fontPaths = fabric.fontPaths; + + for (var i = 0, len = objects.length; i < len; i++) { + obj = objects[i]; + fontFamily = obj.fontFamily; + if (obj.type.indexOf('text') === -1 || fontList[fontFamily] || !fontPaths[fontFamily]) { + continue; + } + fontList[fontFamily] = true; + if (!obj.styles) { + continue; + } + style = obj.styles; + for (rowIndex in style) { + row = style[rowIndex]; + for (charIndex in row) { + _char = row[charIndex]; + fontFamily = _char.fontFamily; + if (!fontList[fontFamily] && fontPaths[fontFamily]) { + fontList[fontFamily] = true; + } + } + } + } + + for (var j in fontList) { + markup += [ + '\t\t@font-face {\n', + '\t\t\tfont-family: \'', j, '\';\n', + '\t\t\tsrc: url(\'', fontPaths[j], '\');\n', + '\t\t}\n' + ].join(''); + } + + if (markup) { + markup = [ + '\t\n' + ].join(''); + } + + return markup; + }, + + /** + * Creates markup containing SVG referenced elements like patterns, gradients etc. + * @param {fabric.Canvas} canvas instance of fabric.Canvas + * @return {String} + */ + createSVGRefElementsMarkup: function(canvas) { + var markup = []; + + _createSVGPattern(markup, canvas, 'backgroundColor'); + _createSVGPattern(markup, canvas, 'overlayColor'); + + return markup.join(''); + } + }); + +})(typeof exports !== 'undefined' ? exports : this); + + +fabric.ElementsParser = function(elements, callback, options, reviver) { + this.elements = elements; + this.callback = callback; + this.options = options; + this.reviver = reviver; + this.svgUid = (options && options.svgUid) || 0; +}; + +fabric.ElementsParser.prototype.parse = function() { + this.instances = new Array(this.elements.length); + this.numElements = this.elements.length; + + this.createObjects(); +}; + +fabric.ElementsParser.prototype.createObjects = function() { + for (var i = 0, len = this.elements.length; i < len; i++) { + this.elements[i].setAttribute('svgUid', this.svgUid); + (function(_obj, i) { + setTimeout(function() { + _obj.createObject(_obj.elements[i], i); + }, 0); + })(this, i); + } +}; + +fabric.ElementsParser.prototype.createObject = function(el, index) { + var klass = fabric[fabric.util.string.capitalize(el.tagName.replace('svg:', ''))]; + if (klass && klass.fromElement) { + try { + this._createObject(klass, el, index); + } + catch (err) { + fabric.log(err); + } + } + else { + this.checkIfDone(); + } +}; + +fabric.ElementsParser.prototype._createObject = function(klass, el, index) { + if (klass.async) { + klass.fromElement(el, this.createCallback(index, el), this.options); + } + else { + var obj = klass.fromElement(el, this.options); + this.resolveGradient(obj, 'fill'); + this.resolveGradient(obj, 'stroke'); + this.reviver && this.reviver(el, obj); + this.instances[index] = obj; + this.checkIfDone(); + } +}; + +fabric.ElementsParser.prototype.createCallback = function(index, el) { + var _this = this; + return function(obj) { + _this.resolveGradient(obj, 'fill'); + _this.resolveGradient(obj, 'stroke'); + _this.reviver && _this.reviver(el, obj); + _this.instances[index] = obj; + _this.checkIfDone(); + }; +}; + +fabric.ElementsParser.prototype.resolveGradient = function(obj, property) { + + var instanceFillValue = obj.get(property); + if (!(/^url\(/).test(instanceFillValue)) { + return; + } + var gradientId = instanceFillValue.slice(5, instanceFillValue.length - 1); + if (fabric.gradientDefs[this.svgUid][gradientId]) { + obj.set(property, + fabric.Gradient.fromElement(fabric.gradientDefs[this.svgUid][gradientId], obj)); + } +}; + +fabric.ElementsParser.prototype.checkIfDone = function() { + if (--this.numElements === 0) { + this.instances = this.instances.filter(function(el) { + // eslint-disable-next-line no-eq-null, eqeqeq + return el != null; + }); + this.callback(this.instances); + } +}; + + +(function(global) { + + 'use strict'; + + /* Adaptation of work of Kevin Lindsey (kevin@kevlindev.com) */ + + var fabric = global.fabric || (global.fabric = { }); + + if (fabric.Point) { + fabric.warn('fabric.Point is already defined'); + return; + } + + fabric.Point = Point; + + /** + * Point class + * @class fabric.Point + * @memberOf fabric + * @constructor + * @param {Number} x + * @param {Number} y + * @return {fabric.Point} thisArg + */ + function Point(x, y) { + this.x = x; + this.y = y; + } + + Point.prototype = /** @lends fabric.Point.prototype */ { + + type: 'point', + + constructor: Point, + + /** + * Adds another point to this one and returns another one + * @param {fabric.Point} that + * @return {fabric.Point} new Point instance with added values + */ + add: function (that) { + return new Point(this.x + that.x, this.y + that.y); + }, + + /** + * Adds another point to this one + * @param {fabric.Point} that + * @return {fabric.Point} thisArg + * @chainable + */ + addEquals: function (that) { + this.x += that.x; + this.y += that.y; + return this; + }, + + /** + * Adds value to this point and returns a new one + * @param {Number} scalar + * @return {fabric.Point} new Point with added value + */ + scalarAdd: function (scalar) { + return new Point(this.x + scalar, this.y + scalar); + }, + + /** + * Adds value to this point + * @param {Number} scalar + * @return {fabric.Point} thisArg + * @chainable + */ + scalarAddEquals: function (scalar) { + this.x += scalar; + this.y += scalar; + return this; + }, + + /** + * Subtracts another point from this point and returns a new one + * @param {fabric.Point} that + * @return {fabric.Point} new Point object with subtracted values + */ + subtract: function (that) { + return new Point(this.x - that.x, this.y - that.y); + }, + + /** + * Subtracts another point from this point + * @param {fabric.Point} that + * @return {fabric.Point} thisArg + * @chainable + */ + subtractEquals: function (that) { + this.x -= that.x; + this.y -= that.y; + return this; + }, + + /** + * Subtracts value from this point and returns a new one + * @param {Number} scalar + * @return {fabric.Point} + */ + scalarSubtract: function (scalar) { + return new Point(this.x - scalar, this.y - scalar); + }, + + /** + * Subtracts value from this point + * @param {Number} scalar + * @return {fabric.Point} thisArg + * @chainable + */ + scalarSubtractEquals: function (scalar) { + this.x -= scalar; + this.y -= scalar; + return this; + }, + + /** + * Miltiplies this point by a value and returns a new one + * TODO: rename in scalarMultiply in 2.0 + * @param {Number} scalar + * @return {fabric.Point} + */ + multiply: function (scalar) { + return new Point(this.x * scalar, this.y * scalar); + }, + + /** + * Miltiplies this point by a value + * TODO: rename in scalarMultiplyEquals in 2.0 + * @param {Number} scalar + * @return {fabric.Point} thisArg + * @chainable + */ + multiplyEquals: function (scalar) { + this.x *= scalar; + this.y *= scalar; + return this; + }, + + /** + * Divides this point by a value and returns a new one + * TODO: rename in scalarDivide in 2.0 + * @param {Number} scalar + * @return {fabric.Point} + */ + divide: function (scalar) { + return new Point(this.x / scalar, this.y / scalar); + }, + + /** + * Divides this point by a value + * TODO: rename in scalarDivideEquals in 2.0 + * @param {Number} scalar + * @return {fabric.Point} thisArg + * @chainable + */ + divideEquals: function (scalar) { + this.x /= scalar; + this.y /= scalar; + return this; + }, + + /** + * Returns true if this point is equal to another one + * @param {fabric.Point} that + * @return {Boolean} + */ + eq: function (that) { + return (this.x === that.x && this.y === that.y); + }, + + /** + * Returns true if this point is less than another one + * @param {fabric.Point} that + * @return {Boolean} + */ + lt: function (that) { + return (this.x < that.x && this.y < that.y); + }, + + /** + * Returns true if this point is less than or equal to another one + * @param {fabric.Point} that + * @return {Boolean} + */ + lte: function (that) { + return (this.x <= that.x && this.y <= that.y); + }, + + /** + + * Returns true if this point is greater another one + * @param {fabric.Point} that + * @return {Boolean} + */ + gt: function (that) { + return (this.x > that.x && this.y > that.y); + }, + + /** + * Returns true if this point is greater than or equal to another one + * @param {fabric.Point} that + * @return {Boolean} + */ + gte: function (that) { + return (this.x >= that.x && this.y >= that.y); + }, + + /** + * Returns new point which is the result of linear interpolation with this one and another one + * @param {fabric.Point} that + * @param {Number} t , position of interpolation, between 0 and 1 default 0.5 + * @return {fabric.Point} + */ + lerp: function (that, t) { + if (typeof t === 'undefined') { + t = 0.5; + } + t = Math.max(Math.min(1, t), 0); + return new Point(this.x + (that.x - this.x) * t, this.y + (that.y - this.y) * t); + }, + + /** + * Returns distance from this point and another one + * @param {fabric.Point} that + * @return {Number} + */ + distanceFrom: function (that) { + var dx = this.x - that.x, + dy = this.y - that.y; + return Math.sqrt(dx * dx + dy * dy); + }, + + /** + * Returns the point between this point and another one + * @param {fabric.Point} that + * @return {fabric.Point} + */ + midPointFrom: function (that) { + return this.lerp(that); + }, + + /** + * Returns a new point which is the min of this and another one + * @param {fabric.Point} that + * @return {fabric.Point} + */ + min: function (that) { + return new Point(Math.min(this.x, that.x), Math.min(this.y, that.y)); + }, + + /** + * Returns a new point which is the max of this and another one + * @param {fabric.Point} that + * @return {fabric.Point} + */ + max: function (that) { + return new Point(Math.max(this.x, that.x), Math.max(this.y, that.y)); + }, + + /** + * Returns string representation of this point + * @return {String} + */ + toString: function () { + return this.x + ',' + this.y; + }, + + /** + * Sets x/y of this point + * @param {Number} x + * @param {Number} y + * @chainable + */ + setXY: function (x, y) { + this.x = x; + this.y = y; + return this; + }, + + /** + * Sets x of this point + * @param {Number} x + * @chainable + */ + setX: function (x) { + this.x = x; + return this; + }, + + /** + * Sets y of this point + * @param {Number} y + * @chainable + */ + setY: function (y) { + this.y = y; + return this; + }, + + /** + * Sets x/y of this point from another point + * @param {fabric.Point} that + * @chainable + */ + setFromPoint: function (that) { + this.x = that.x; + this.y = that.y; + return this; + }, + + /** + * Swaps x/y of this point and another point + * @param {fabric.Point} that + */ + swap: function (that) { + var x = this.x, + y = this.y; + this.x = that.x; + this.y = that.y; + that.x = x; + that.y = y; + }, + + /** + * return a cloned instance of the point + * @return {fabric.Point} + */ + clone: function () { + return new Point(this.x, this.y); + } + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + /* Adaptation of work of Kevin Lindsey (kevin@kevlindev.com) */ + var fabric = global.fabric || (global.fabric = { }); + + if (fabric.Intersection) { + fabric.warn('fabric.Intersection is already defined'); + return; + } + + /** + * Intersection class + * @class fabric.Intersection + * @memberOf fabric + * @constructor + */ + function Intersection(status) { + this.status = status; + this.points = []; + } + + fabric.Intersection = Intersection; + + fabric.Intersection.prototype = /** @lends fabric.Intersection.prototype */ { + + constructor: Intersection, + + /** + * Appends a point to intersection + * @param {fabric.Point} point + * @return {fabric.Intersection} thisArg + * @chainable + */ + appendPoint: function (point) { + this.points.push(point); + return this; + }, + + /** + * Appends points to intersection + * @param {Array} points + * @return {fabric.Intersection} thisArg + * @chainable + */ + appendPoints: function (points) { + this.points = this.points.concat(points); + return this; + } + }; + + /** + * Checks if one line intersects another + * TODO: rename in intersectSegmentSegment + * @static + * @param {fabric.Point} a1 + * @param {fabric.Point} a2 + * @param {fabric.Point} b1 + * @param {fabric.Point} b2 + * @return {fabric.Intersection} + */ + fabric.Intersection.intersectLineLine = function (a1, a2, b1, b2) { + var result, + uaT = (b2.x - b1.x) * (a1.y - b1.y) - (b2.y - b1.y) * (a1.x - b1.x), + ubT = (a2.x - a1.x) * (a1.y - b1.y) - (a2.y - a1.y) * (a1.x - b1.x), + uB = (b2.y - b1.y) * (a2.x - a1.x) - (b2.x - b1.x) * (a2.y - a1.y); + if (uB !== 0) { + var ua = uaT / uB, + ub = ubT / uB; + if (0 <= ua && ua <= 1 && 0 <= ub && ub <= 1) { + result = new Intersection('Intersection'); + result.appendPoint(new fabric.Point(a1.x + ua * (a2.x - a1.x), a1.y + ua * (a2.y - a1.y))); + } + else { + result = new Intersection(); + } + } + else { + if (uaT === 0 || ubT === 0) { + result = new Intersection('Coincident'); + } + else { + result = new Intersection('Parallel'); + } + } + return result; + }; + + /** + * Checks if line intersects polygon + * TODO: rename in intersectSegmentPolygon + * fix detection of coincident + * @static + * @param {fabric.Point} a1 + * @param {fabric.Point} a2 + * @param {Array} points + * @return {fabric.Intersection} + */ + fabric.Intersection.intersectLinePolygon = function(a1, a2, points) { + var result = new Intersection(), + length = points.length, + b1, b2, inter; + + for (var i = 0; i < length; i++) { + b1 = points[i]; + b2 = points[(i + 1) % length]; + inter = Intersection.intersectLineLine(a1, a2, b1, b2); + + result.appendPoints(inter.points); + } + if (result.points.length > 0) { + result.status = 'Intersection'; + } + return result; + }; + + /** + * Checks if polygon intersects another polygon + * @static + * @param {Array} points1 + * @param {Array} points2 + * @return {fabric.Intersection} + */ + fabric.Intersection.intersectPolygonPolygon = function (points1, points2) { + var result = new Intersection(), + length = points1.length; + + for (var i = 0; i < length; i++) { + var a1 = points1[i], + a2 = points1[(i + 1) % length], + inter = Intersection.intersectLinePolygon(a1, a2, points2); + + result.appendPoints(inter.points); + } + if (result.points.length > 0) { + result.status = 'Intersection'; + } + return result; + }; + + /** + * Checks if polygon intersects rectangle + * @static + * @param {Array} points + * @param {fabric.Point} r1 + * @param {fabric.Point} r2 + * @return {fabric.Intersection} + */ + fabric.Intersection.intersectPolygonRectangle = function (points, r1, r2) { + var min = r1.min(r2), + max = r1.max(r2), + topRight = new fabric.Point(max.x, min.y), + bottomLeft = new fabric.Point(min.x, max.y), + inter1 = Intersection.intersectLinePolygon(min, topRight, points), + inter2 = Intersection.intersectLinePolygon(topRight, max, points), + inter3 = Intersection.intersectLinePolygon(max, bottomLeft, points), + inter4 = Intersection.intersectLinePolygon(bottomLeft, min, points), + result = new Intersection(); + + result.appendPoints(inter1.points); + result.appendPoints(inter2.points); + result.appendPoints(inter3.points); + result.appendPoints(inter4.points); + + if (result.points.length > 0) { + result.status = 'Intersection'; + } + return result; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }); + + if (fabric.Color) { + fabric.warn('fabric.Color is already defined.'); + return; + } + + /** + * Color class + * The purpose of {@link fabric.Color} is to abstract and encapsulate common color operations; + * {@link fabric.Color} is a constructor and creates instances of {@link fabric.Color} objects. + * + * @class fabric.Color + * @param {String} color optional in hex or rgb(a) or hsl format or from known color list + * @return {fabric.Color} thisArg + * @tutorial {@link http://fabricjs.com/fabric-intro-part-2/#colors} + */ + function Color(color) { + if (!color) { + this.setSource([0, 0, 0, 1]); + } + else { + this._tryParsingColor(color); + } + } + + fabric.Color = Color; + + fabric.Color.prototype = /** @lends fabric.Color.prototype */ { + + /** + * @private + * @param {String|Array} color Color value to parse + */ + _tryParsingColor: function(color) { + var source; + + if (color in Color.colorNameMap) { + color = Color.colorNameMap[color]; + } + + if (color === 'transparent') { + source = [255, 255, 255, 0]; + } + + if (!source) { + source = Color.sourceFromHex(color); + } + if (!source) { + source = Color.sourceFromRgb(color); + } + if (!source) { + source = Color.sourceFromHsl(color); + } + if (!source) { + //if color is not recognize let's make black as canvas does + source = [0, 0, 0, 1]; + } + if (source) { + this.setSource(source); + } + }, + + /** + * Adapted from https://github.com/mjijackson + * @private + * @param {Number} r Red color value + * @param {Number} g Green color value + * @param {Number} b Blue color value + * @return {Array} Hsl color + */ + _rgbToHsl: function(r, g, b) { + r /= 255; g /= 255; b /= 255; + + var h, s, l, + max = fabric.util.array.max([r, g, b]), + min = fabric.util.array.min([r, g, b]); + + l = (max + min) / 2; + + if (max === min) { + h = s = 0; // achromatic + } + else { + var d = max - min; + s = l > 0.5 ? d / (2 - max - min) : d / (max + min); + switch (max) { + case r: + h = (g - b) / d + (g < b ? 6 : 0); + break; + case g: + h = (b - r) / d + 2; + break; + case b: + h = (r - g) / d + 4; + break; + } + h /= 6; + } + + return [ + Math.round(h * 360), + Math.round(s * 100), + Math.round(l * 100) + ]; + }, + + /** + * Returns source of this color (where source is an array representation; ex: [200, 200, 100, 1]) + * @return {Array} + */ + getSource: function() { + return this._source; + }, + + /** + * Sets source of this color (where source is an array representation; ex: [200, 200, 100, 1]) + * @param {Array} source + */ + setSource: function(source) { + this._source = source; + }, + + /** + * Returns color represenation in RGB format + * @return {String} ex: rgb(0-255,0-255,0-255) + */ + toRgb: function() { + var source = this.getSource(); + return 'rgb(' + source[0] + ',' + source[1] + ',' + source[2] + ')'; + }, + + /** + * Returns color represenation in RGBA format + * @return {String} ex: rgba(0-255,0-255,0-255,0-1) + */ + toRgba: function() { + var source = this.getSource(); + return 'rgba(' + source[0] + ',' + source[1] + ',' + source[2] + ',' + source[3] + ')'; + }, + + /** + * Returns color represenation in HSL format + * @return {String} ex: hsl(0-360,0%-100%,0%-100%) + */ + toHsl: function() { + var source = this.getSource(), + hsl = this._rgbToHsl(source[0], source[1], source[2]); + + return 'hsl(' + hsl[0] + ',' + hsl[1] + '%,' + hsl[2] + '%)'; + }, + + /** + * Returns color represenation in HSLA format + * @return {String} ex: hsla(0-360,0%-100%,0%-100%,0-1) + */ + toHsla: function() { + var source = this.getSource(), + hsl = this._rgbToHsl(source[0], source[1], source[2]); + + return 'hsla(' + hsl[0] + ',' + hsl[1] + '%,' + hsl[2] + '%,' + source[3] + ')'; + }, + + /** + * Returns color represenation in HEX format + * @return {String} ex: FF5555 + */ + toHex: function() { + var source = this.getSource(), r, g, b; + + r = source[0].toString(16); + r = (r.length === 1) ? ('0' + r) : r; + + g = source[1].toString(16); + g = (g.length === 1) ? ('0' + g) : g; + + b = source[2].toString(16); + b = (b.length === 1) ? ('0' + b) : b; + + return r.toUpperCase() + g.toUpperCase() + b.toUpperCase(); + }, + + /** + * Gets value of alpha channel for this color + * @return {Number} 0-1 + */ + getAlpha: function() { + return this.getSource()[3]; + }, + + /** + * Sets value of alpha channel for this color + * @param {Number} alpha Alpha value 0-1 + * @return {fabric.Color} thisArg + */ + setAlpha: function(alpha) { + var source = this.getSource(); + source[3] = alpha; + this.setSource(source); + return this; + }, + + /** + * Transforms color to its grayscale representation + * @return {fabric.Color} thisArg + */ + toGrayscale: function() { + var source = this.getSource(), + average = parseInt((source[0] * 0.3 + source[1] * 0.59 + source[2] * 0.11).toFixed(0), 10), + currentAlpha = source[3]; + this.setSource([average, average, average, currentAlpha]); + return this; + }, + + /** + * Transforms color to its black and white representation + * @param {Number} threshold + * @return {fabric.Color} thisArg + */ + toBlackWhite: function(threshold) { + var source = this.getSource(), + average = (source[0] * 0.3 + source[1] * 0.59 + source[2] * 0.11).toFixed(0), + currentAlpha = source[3]; + + threshold = threshold || 127; + + average = (Number(average) < Number(threshold)) ? 0 : 255; + this.setSource([average, average, average, currentAlpha]); + return this; + }, + + /** + * Overlays color with another color + * @param {String|fabric.Color} otherColor + * @return {fabric.Color} thisArg + */ + overlayWith: function(otherColor) { + if (!(otherColor instanceof Color)) { + otherColor = new Color(otherColor); + } + + var result = [], + alpha = this.getAlpha(), + otherAlpha = 0.5, + source = this.getSource(), + otherSource = otherColor.getSource(); + + for (var i = 0; i < 3; i++) { + result.push(Math.round((source[i] * (1 - otherAlpha)) + (otherSource[i] * otherAlpha))); + } + + result[3] = alpha; + this.setSource(result); + return this; + } + }; + + /** + * Regex matching color in RGB or RGBA formats (ex: rgb(0, 0, 0), rgba(255, 100, 10, 0.5), rgba( 255 , 100 , 10 , 0.5 ), rgb(1,1,1), rgba(100%, 60%, 10%, 0.5)) + * @static + * @field + * @memberOf fabric.Color + */ + // eslint-disable-next-line max-len + fabric.Color.reRGBa = /^rgba?\(\s*(\d{1,3}(?:\.\d+)?\%?)\s*,\s*(\d{1,3}(?:\.\d+)?\%?)\s*,\s*(\d{1,3}(?:\.\d+)?\%?)\s*(?:\s*,\s*(\d+(?:\.\d+)?)\s*)?\)$/; + + /** + * Regex matching color in HSL or HSLA formats (ex: hsl(200, 80%, 10%), hsla(300, 50%, 80%, 0.5), hsla( 300 , 50% , 80% , 0.5 )) + * @static + * @field + * @memberOf fabric.Color + */ + fabric.Color.reHSLa = /^hsla?\(\s*(\d{1,3})\s*,\s*(\d{1,3}\%)\s*,\s*(\d{1,3}\%)\s*(?:\s*,\s*(\d+(?:\.\d+)?)\s*)?\)$/; + + /** + * Regex matching color in HEX format (ex: #FF5544CC, #FF5555, 010155, aff) + * @static + * @field + * @memberOf fabric.Color + */ + fabric.Color.reHex = /^#?([0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{4}|[0-9a-f]{3})$/i; + + /** + * Map of the 17 basic color names with HEX code + * @static + * @field + * @memberOf fabric.Color + * @see: http://www.w3.org/TR/CSS2/syndata.html#color-units + */ + fabric.Color.colorNameMap = { + aqua: '#00FFFF', + black: '#000000', + blue: '#0000FF', + fuchsia: '#FF00FF', + gray: '#808080', + grey: '#808080', + green: '#008000', + lime: '#00FF00', + maroon: '#800000', + navy: '#000080', + olive: '#808000', + orange: '#FFA500', + purple: '#800080', + red: '#FF0000', + silver: '#C0C0C0', + teal: '#008080', + white: '#FFFFFF', + yellow: '#FFFF00' + }; + + /** + * @private + * @param {Number} p + * @param {Number} q + * @param {Number} t + * @return {Number} + */ + function hue2rgb(p, q, t) { + if (t < 0) { + t += 1; + } + if (t > 1) { + t -= 1; + } + if (t < 1 / 6) { + return p + (q - p) * 6 * t; + } + if (t < 1 / 2) { + return q; + } + if (t < 2 / 3) { + return p + (q - p) * (2 / 3 - t) * 6; + } + return p; + } + + /** + * Returns new color object, when given a color in RGB format + * @memberOf fabric.Color + * @param {String} color Color value ex: rgb(0-255,0-255,0-255) + * @return {fabric.Color} + */ + fabric.Color.fromRgb = function(color) { + return Color.fromSource(Color.sourceFromRgb(color)); + }; + + /** + * Returns array representation (ex: [100, 100, 200, 1]) of a color that's in RGB or RGBA format + * @memberOf fabric.Color + * @param {String} color Color value ex: rgb(0-255,0-255,0-255), rgb(0%-100%,0%-100%,0%-100%) + * @return {Array} source + */ + fabric.Color.sourceFromRgb = function(color) { + var match = color.match(Color.reRGBa); + if (match) { + var r = parseInt(match[1], 10) / (/%$/.test(match[1]) ? 100 : 1) * (/%$/.test(match[1]) ? 255 : 1), + g = parseInt(match[2], 10) / (/%$/.test(match[2]) ? 100 : 1) * (/%$/.test(match[2]) ? 255 : 1), + b = parseInt(match[3], 10) / (/%$/.test(match[3]) ? 100 : 1) * (/%$/.test(match[3]) ? 255 : 1); + + return [ + parseInt(r, 10), + parseInt(g, 10), + parseInt(b, 10), + match[4] ? parseFloat(match[4]) : 1 + ]; + } + }; + + /** + * Returns new color object, when given a color in RGBA format + * @static + * @function + * @memberOf fabric.Color + * @param {String} color + * @return {fabric.Color} + */ + fabric.Color.fromRgba = Color.fromRgb; + + /** + * Returns new color object, when given a color in HSL format + * @param {String} color Color value ex: hsl(0-260,0%-100%,0%-100%) + * @memberOf fabric.Color + * @return {fabric.Color} + */ + fabric.Color.fromHsl = function(color) { + return Color.fromSource(Color.sourceFromHsl(color)); + }; + + /** + * Returns array representation (ex: [100, 100, 200, 1]) of a color that's in HSL or HSLA format. + * Adapted from https://github.com/mjijackson + * @memberOf fabric.Color + * @param {String} color Color value ex: hsl(0-360,0%-100%,0%-100%) or hsla(0-360,0%-100%,0%-100%, 0-1) + * @return {Array} source + * @see http://http://www.w3.org/TR/css3-color/#hsl-color + */ + fabric.Color.sourceFromHsl = function(color) { + var match = color.match(Color.reHSLa); + if (!match) { + return; + } + + var h = (((parseFloat(match[1]) % 360) + 360) % 360) / 360, + s = parseFloat(match[2]) / (/%$/.test(match[2]) ? 100 : 1), + l = parseFloat(match[3]) / (/%$/.test(match[3]) ? 100 : 1), + r, g, b; + + if (s === 0) { + r = g = b = l; + } + else { + var q = l <= 0.5 ? l * (s + 1) : l + s - l * s, + p = l * 2 - q; + + r = hue2rgb(p, q, h + 1 / 3); + g = hue2rgb(p, q, h); + b = hue2rgb(p, q, h - 1 / 3); + } + + return [ + Math.round(r * 255), + Math.round(g * 255), + Math.round(b * 255), + match[4] ? parseFloat(match[4]) : 1 + ]; + }; + + /** + * Returns new color object, when given a color in HSLA format + * @static + * @function + * @memberOf fabric.Color + * @param {String} color + * @return {fabric.Color} + */ + fabric.Color.fromHsla = Color.fromHsl; + + /** + * Returns new color object, when given a color in HEX format + * @static + * @memberOf fabric.Color + * @param {String} color Color value ex: FF5555 + * @return {fabric.Color} + */ + fabric.Color.fromHex = function(color) { + return Color.fromSource(Color.sourceFromHex(color)); + }; + + /** + * Returns array representation (ex: [100, 100, 200, 1]) of a color that's in HEX format + * @static + * @memberOf fabric.Color + * @param {String} color ex: FF5555 or FF5544CC (RGBa) + * @return {Array} source + */ + fabric.Color.sourceFromHex = function(color) { + if (color.match(Color.reHex)) { + var value = color.slice(color.indexOf('#') + 1), + isShortNotation = (value.length === 3 || value.length === 4), + isRGBa = (value.length === 8 || value.length === 4), + r = isShortNotation ? (value.charAt(0) + value.charAt(0)) : value.substring(0, 2), + g = isShortNotation ? (value.charAt(1) + value.charAt(1)) : value.substring(2, 4), + b = isShortNotation ? (value.charAt(2) + value.charAt(2)) : value.substring(4, 6), + a = isRGBa ? (isShortNotation ? (value.charAt(3) + value.charAt(3)) : value.substring(6, 8)) : 'FF'; + + return [ + parseInt(r, 16), + parseInt(g, 16), + parseInt(b, 16), + parseFloat((parseInt(a, 16) / 255).toFixed(2)) + ]; + } + }; + + /** + * Returns new color object, when given color in array representation (ex: [200, 100, 100, 0.5]) + * @static + * @memberOf fabric.Color + * @param {Array} source + * @return {fabric.Color} + */ + fabric.Color.fromSource = function(source) { + var oColor = new Color(); + oColor.setSource(source); + return oColor; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function() { + + /* _FROM_SVG_START_ */ + function getColorStop(el) { + var style = el.getAttribute('style'), + offset = el.getAttribute('offset') || 0, + color, colorAlpha, opacity; + + // convert percents to absolute values + offset = parseFloat(offset) / (/%$/.test(offset) ? 100 : 1); + offset = offset < 0 ? 0 : offset > 1 ? 1 : offset; + if (style) { + var keyValuePairs = style.split(/\s*;\s*/); + + if (keyValuePairs[keyValuePairs.length - 1] === '') { + keyValuePairs.pop(); + } + + for (var i = keyValuePairs.length; i--; ) { + + var split = keyValuePairs[i].split(/\s*:\s*/), + key = split[0].trim(), + value = split[1].trim(); + + if (key === 'stop-color') { + color = value; + } + else if (key === 'stop-opacity') { + opacity = value; + } + } + } + + if (!color) { + color = el.getAttribute('stop-color') || 'rgb(0,0,0)'; + } + if (!opacity) { + opacity = el.getAttribute('stop-opacity'); + } + + color = new fabric.Color(color); + colorAlpha = color.getAlpha(); + opacity = isNaN(parseFloat(opacity)) ? 1 : parseFloat(opacity); + opacity *= colorAlpha; + + return { + offset: offset, + color: color.toRgb(), + opacity: opacity + }; + } + + function getLinearCoords(el) { + return { + x1: el.getAttribute('x1') || 0, + y1: el.getAttribute('y1') || 0, + x2: el.getAttribute('x2') || '100%', + y2: el.getAttribute('y2') || 0 + }; + } + + function getRadialCoords(el) { + return { + x1: el.getAttribute('fx') || el.getAttribute('cx') || '50%', + y1: el.getAttribute('fy') || el.getAttribute('cy') || '50%', + r1: 0, + x2: el.getAttribute('cx') || '50%', + y2: el.getAttribute('cy') || '50%', + r2: el.getAttribute('r') || '50%' + }; + } + /* _FROM_SVG_END_ */ + + /** + * Gradient class + * @class fabric.Gradient + * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#gradients} + * @see {@link fabric.Gradient#initialize} for constructor definition + */ + fabric.Gradient = fabric.util.createClass(/** @lends fabric.Gradient.prototype */ { + + /** + * Horizontal offset for aligning gradients coming from SVG when outside pathgroups + * @type Number + * @default 0 + */ + offsetX: 0, + + /** + * Vertical offset for aligning gradients coming from SVG when outside pathgroups + * @type Number + * @default 0 + */ + offsetY: 0, + + /** + * Constructor + * @param {Object} [options] Options object with type, coords, gradientUnits and colorStops + * @return {fabric.Gradient} thisArg + */ + initialize: function(options) { + options || (options = { }); + + var coords = { }; + + this.id = fabric.Object.__uid++; + this.type = options.type || 'linear'; + + coords = { + x1: options.coords.x1 || 0, + y1: options.coords.y1 || 0, + x2: options.coords.x2 || 0, + y2: options.coords.y2 || 0 + }; + + if (this.type === 'radial') { + coords.r1 = options.coords.r1 || 0; + coords.r2 = options.coords.r2 || 0; + } + this.coords = coords; + this.colorStops = options.colorStops.slice(); + if (options.gradientTransform) { + this.gradientTransform = options.gradientTransform; + } + this.offsetX = options.offsetX || this.offsetX; + this.offsetY = options.offsetY || this.offsetY; + }, + + /** + * Adds another colorStop + * @param {Object} colorStop Object with offset and color + * @return {fabric.Gradient} thisArg + */ + addColorStop: function(colorStop) { + for (var position in colorStop) { + var color = new fabric.Color(colorStop[position]); + this.colorStops.push({ + offset: position, + color: color.toRgb(), + opacity: color.getAlpha() + }); + } + return this; + }, + + /** + * Returns object representation of a gradient + * @return {Object} + */ + toObject: function() { + return { + type: this.type, + coords: this.coords, + colorStops: this.colorStops, + offsetX: this.offsetX, + offsetY: this.offsetY, + gradientTransform: this.gradientTransform ? this.gradientTransform.concat() : this.gradientTransform + }; + }, + + /* _TO_SVG_START_ */ + /** + * Returns SVG representation of an gradient + * @param {Object} object Object to create a gradient for + * @return {String} SVG representation of an gradient (linear/radial) + */ + toSVG: function(object) { + var coords = fabric.util.object.clone(this.coords), + markup, commonAttributes; + + // colorStops must be sorted ascending + this.colorStops.sort(function(a, b) { + return a.offset - b.offset; + }); + + if (!(object.group && object.group.type === 'path-group')) { + for (var prop in coords) { + if (prop === 'x1' || prop === 'x2' || prop === 'r2') { + coords[prop] += this.offsetX - object.width / 2; + } + else if (prop === 'y1' || prop === 'y2') { + coords[prop] += this.offsetY - object.height / 2; + } + } + } + + commonAttributes = 'id="SVGID_' + this.id + + '" gradientUnits="userSpaceOnUse"'; + if (this.gradientTransform) { + commonAttributes += ' gradientTransform="matrix(' + this.gradientTransform.join(' ') + ')" '; + } + if (this.type === 'linear') { + markup = [ + '\n' + ]; + } + else if (this.type === 'radial') { + markup = [ + '\n' + ]; + } + + for (var i = 0; i < this.colorStops.length; i++) { + markup.push( + '\n' + ); + } + + markup.push((this.type === 'linear' ? '\n' : '\n')); + + return markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * Returns an instance of CanvasGradient + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Object} object + * @return {CanvasGradient} + */ + toLive: function(ctx, object) { + var gradient, prop, coords = fabric.util.object.clone(this.coords); + + if (!this.type) { + return; + } + + if (object.group && object.group.type === 'path-group') { + for (prop in coords) { + if (prop === 'x1' || prop === 'x2') { + coords[prop] += -this.offsetX + object.width / 2; + } + else if (prop === 'y1' || prop === 'y2') { + coords[prop] += -this.offsetY + object.height / 2; + } + } + } + + if (this.type === 'linear') { + gradient = ctx.createLinearGradient( + coords.x1, coords.y1, coords.x2, coords.y2); + } + else if (this.type === 'radial') { + gradient = ctx.createRadialGradient( + coords.x1, coords.y1, coords.r1, coords.x2, coords.y2, coords.r2); + } + + for (var i = 0, len = this.colorStops.length; i < len; i++) { + var color = this.colorStops[i].color, + opacity = this.colorStops[i].opacity, + offset = this.colorStops[i].offset; + + if (typeof opacity !== 'undefined') { + color = new fabric.Color(color).setAlpha(opacity).toRgba(); + } + gradient.addColorStop(parseFloat(offset), color); + } + + return gradient; + } + }); + + fabric.util.object.extend(fabric.Gradient, { + + /* _FROM_SVG_START_ */ + /** + * Returns {@link fabric.Gradient} instance from an SVG element + * @static + * @memberOf fabric.Gradient + * @param {SVGGradientElement} el SVG gradient element + * @param {fabric.Object} instance + * @return {fabric.Gradient} Gradient instance + * @see http://www.w3.org/TR/SVG/pservers.html#LinearGradientElement + * @see http://www.w3.org/TR/SVG/pservers.html#RadialGradientElement + */ + fromElement: function(el, instance) { + + /** + * @example: + * + * + * + * + * + * + * OR + * + * + * + * + * + * + * OR + * + * + * + * + * + * + * + * OR + * + * + * + * + * + * + * + */ + + var colorStopEls = el.getElementsByTagName('stop'), + type, + gradientUnits = el.getAttribute('gradientUnits') || 'objectBoundingBox', + gradientTransform = el.getAttribute('gradientTransform'), + colorStops = [], + coords, ellipseMatrix; + + if (el.nodeName === 'linearGradient' || el.nodeName === 'LINEARGRADIENT') { + type = 'linear'; + } + else { + type = 'radial'; + } + + if (type === 'linear') { + coords = getLinearCoords(el); + } + else if (type === 'radial') { + coords = getRadialCoords(el); + } + + for (var i = colorStopEls.length; i--; ) { + colorStops.push(getColorStop(colorStopEls[i])); + } + + ellipseMatrix = _convertPercentUnitsToValues(instance, coords, gradientUnits); + + var gradient = new fabric.Gradient({ + type: type, + coords: coords, + colorStops: colorStops, + offsetX: -instance.left, + offsetY: -instance.top + }); + + if (gradientTransform || ellipseMatrix !== '') { + gradient.gradientTransform = fabric.parseTransformAttribute((gradientTransform || '') + ellipseMatrix); + } + return gradient; + }, + /* _FROM_SVG_END_ */ + + /** + * Returns {@link fabric.Gradient} instance from its object representation + * @static + * @memberOf fabric.Gradient + * @param {Object} obj + * @param {Object} [options] Options object + */ + forObject: function(obj, options) { + options || (options = { }); + _convertPercentUnitsToValues(obj, options.coords, 'userSpaceOnUse'); + return new fabric.Gradient(options); + } + }); + + /** + * @private + */ + function _convertPercentUnitsToValues(object, options, gradientUnits) { + var propValue, addFactor = 0, multFactor = 1, ellipseMatrix = ''; + for (var prop in options) { + if (options[prop] === 'Infinity') { + options[prop] = 1; + } + else if (options[prop] === '-Infinity') { + options[prop] = 0; + } + propValue = parseFloat(options[prop], 10); + if (typeof options[prop] === 'string' && /^\d+%$/.test(options[prop])) { + multFactor = 0.01; + } + else { + multFactor = 1; + } + if (prop === 'x1' || prop === 'x2' || prop === 'r2') { + multFactor *= gradientUnits === 'objectBoundingBox' ? object.width : 1; + addFactor = gradientUnits === 'objectBoundingBox' ? object.left || 0 : 0; + } + else if (prop === 'y1' || prop === 'y2') { + multFactor *= gradientUnits === 'objectBoundingBox' ? object.height : 1; + addFactor = gradientUnits === 'objectBoundingBox' ? object.top || 0 : 0; + } + options[prop] = propValue * multFactor + addFactor; + } + if (object.type === 'ellipse' && + options.r2 !== null && + gradientUnits === 'objectBoundingBox' && + object.rx !== object.ry) { + + var scaleFactor = object.ry / object.rx; + ellipseMatrix = ' scale(1, ' + scaleFactor + ')'; + if (options.y1) { + options.y1 /= scaleFactor; + } + if (options.y2) { + options.y2 /= scaleFactor; + } + } + return ellipseMatrix; + } +})(); + + +/** + * Pattern class + * @class fabric.Pattern + * @see {@link http://fabricjs.com/patterns|Pattern demo} + * @see {@link http://fabricjs.com/dynamic-patterns|DynamicPattern demo} + * @see {@link fabric.Pattern#initialize} for constructor definition + */ +fabric.Pattern = fabric.util.createClass(/** @lends fabric.Pattern.prototype */ { + + /** + * Repeat property of a pattern (one of repeat, repeat-x, repeat-y or no-repeat) + * @type String + * @default + */ + repeat: 'repeat', + + /** + * Pattern horizontal offset from object's left/top corner + * @type Number + * @default + */ + offsetX: 0, + + /** + * Pattern vertical offset from object's left/top corner + * @type Number + * @default + */ + offsetY: 0, + + /** + * Constructor + * @param {Object} [options] Options object + * @return {fabric.Pattern} thisArg + */ + initialize: function(options) { + options || (options = { }); + + this.id = fabric.Object.__uid++; + + if (options.source) { + if (typeof options.source === 'string') { + // function string + if (typeof fabric.util.getFunctionBody(options.source) !== 'undefined') { + this.source = new Function(fabric.util.getFunctionBody(options.source)); + } + else { + // img src string + var _this = this; + this.source = fabric.util.createImage(); + fabric.util.loadImage(options.source, function(img) { + _this.source = img; + }); + } + } + else { + // img element + this.source = options.source; + } + } + if (options.repeat) { + this.repeat = options.repeat; + } + if (options.offsetX) { + this.offsetX = options.offsetX; + } + if (options.offsetY) { + this.offsetY = options.offsetY; + } + }, + + /** + * Returns object representation of a pattern + * @return {Object} Object representation of a pattern instance + */ + toObject: function() { + + var source; + + // callback + if (typeof this.source === 'function') { + source = String(this.source); + } + // element + else if (typeof this.source.src === 'string') { + source = this.source.src; + } + // element + else if (typeof this.source === 'object' && this.source.toDataURL) { + source = this.source.toDataURL(); + } + + return { + source: source, + repeat: this.repeat, + offsetX: this.offsetX, + offsetY: this.offsetY + }; + }, + + /* _TO_SVG_START_ */ + /** + * Returns SVG representation of a pattern + * @param {fabric.Object} object + * @return {String} SVG representation of a pattern + */ + toSVG: function(object) { + var patternSource = typeof this.source === 'function' ? this.source() : this.source, + patternWidth = patternSource.width / object.getWidth(), + patternHeight = patternSource.height / object.getHeight(), + patternOffsetX = this.offsetX / object.getWidth(), + patternOffsetY = this.offsetY / object.getHeight(), + patternImgSrc = ''; + if (this.repeat === 'repeat-x' || this.repeat === 'no-repeat') { + patternHeight = 1; + } + if (this.repeat === 'repeat-y' || this.repeat === 'no-repeat') { + patternWidth = 1; + } + if (patternSource.src) { + patternImgSrc = patternSource.src; + } + else if (patternSource.toDataURL) { + patternImgSrc = patternSource.toDataURL(); + } + + return '\n' + + '\n' + + '\n'; + }, + /* _TO_SVG_END_ */ + + /** + * Returns an instance of CanvasPattern + * @param {CanvasRenderingContext2D} ctx Context to create pattern + * @return {CanvasPattern} + */ + toLive: function(ctx) { + var source = typeof this.source === 'function' + ? this.source() + : this.source; + + // if the image failed to load, return, and allow rest to continue loading + if (!source) { + return ''; + } + + // if an image + if (typeof source.src !== 'undefined') { + if (!source.complete) { + return ''; + } + if (source.naturalWidth === 0 || source.naturalHeight === 0) { + return ''; + } + } + return ctx.createPattern(source, this.repeat); + } +}); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + toFixed = fabric.util.toFixed; + + if (fabric.Shadow) { + fabric.warn('fabric.Shadow is already defined.'); + return; + } + + /** + * Shadow class + * @class fabric.Shadow + * @see {@link http://fabricjs.com/shadows|Shadow demo} + * @see {@link fabric.Shadow#initialize} for constructor definition + */ + fabric.Shadow = fabric.util.createClass(/** @lends fabric.Shadow.prototype */ { + + /** + * Shadow color + * @type String + * @default + */ + color: 'rgb(0,0,0)', + + /** + * Shadow blur + * @type Number + */ + blur: 0, + + /** + * Shadow horizontal offset + * @type Number + * @default + */ + offsetX: 0, + + /** + * Shadow vertical offset + * @type Number + * @default + */ + offsetY: 0, + + /** + * Whether the shadow should affect stroke operations + * @type Boolean + * @default + */ + affectStroke: false, + + /** + * Indicates whether toObject should include default values + * @type Boolean + * @default + */ + includeDefaultValues: true, + + /** + * Constructor + * @param {Object|String} [options] Options object with any of color, blur, offsetX, offsetX properties or string (e.g. "rgba(0,0,0,0.2) 2px 2px 10px, "2px 2px 10px rgba(0,0,0,0.2)") + * @return {fabric.Shadow} thisArg + */ + initialize: function(options) { + + if (typeof options === 'string') { + options = this._parseShadow(options); + } + + for (var prop in options) { + this[prop] = options[prop]; + } + + this.id = fabric.Object.__uid++; + }, + + /** + * @private + * @param {String} shadow Shadow value to parse + * @return {Object} Shadow object with color, offsetX, offsetY and blur + */ + _parseShadow: function(shadow) { + var shadowStr = shadow.trim(), + offsetsAndBlur = fabric.Shadow.reOffsetsAndBlur.exec(shadowStr) || [], + color = shadowStr.replace(fabric.Shadow.reOffsetsAndBlur, '') || 'rgb(0,0,0)'; + + return { + color: color.trim(), + offsetX: parseInt(offsetsAndBlur[1], 10) || 0, + offsetY: parseInt(offsetsAndBlur[2], 10) || 0, + blur: parseInt(offsetsAndBlur[3], 10) || 0 + }; + }, + + /** + * Returns a string representation of an instance + * @see http://www.w3.org/TR/css-text-decor-3/#text-shadow + * @return {String} Returns CSS3 text-shadow declaration + */ + toString: function() { + return [this.offsetX, this.offsetY, this.blur, this.color].join('px '); + }, + + /* _TO_SVG_START_ */ + /** + * Returns SVG representation of a shadow + * @param {fabric.Object} object + * @return {String} SVG representation of a shadow + */ + toSVG: function(object) { + var fBoxX = 40, fBoxY = 40, NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS, + offset = fabric.util.rotateVector( + { x: this.offsetX, y: this.offsetY }, + fabric.util.degreesToRadians(-object.angle)), + BLUR_BOX = 20; + + if (object.width && object.height) { + //http://www.w3.org/TR/SVG/filters.html#FilterEffectsRegion + // we add some extra space to filter box to contain the blur ( 20 ) + fBoxX = toFixed((Math.abs(offset.x) + this.blur) / object.width, NUM_FRACTION_DIGITS) * 100 + BLUR_BOX; + fBoxY = toFixed((Math.abs(offset.y) + this.blur) / object.height, NUM_FRACTION_DIGITS) * 100 + BLUR_BOX; + } + if (object.flipX) { + offset.x *= -1; + } + if (object.flipY) { + offset.y *= -1; + } + return ( + '\n' + + '\t\n' + + '\t\n' + + '\t\n' + + '\t\n' + + '\t\n' + + '\t\t\n' + + '\t\t\n' + + '\t\n' + + '\n'); + }, + /* _TO_SVG_END_ */ + + /** + * Returns object representation of a shadow + * @return {Object} Object representation of a shadow instance + */ + toObject: function() { + if (this.includeDefaultValues) { + return { + color: this.color, + blur: this.blur, + offsetX: this.offsetX, + offsetY: this.offsetY, + affectStroke: this.affectStroke + }; + } + var obj = { }, proto = fabric.Shadow.prototype; + + ['color', 'blur', 'offsetX', 'offsetY', 'affectStroke'].forEach(function(prop) { + if (this[prop] !== proto[prop]) { + obj[prop] = this[prop]; + } + }, this); + + return obj; + } + }); + + /** + * Regex matching shadow offsetX, offsetY and blur (ex: "2px 2px 10px rgba(0,0,0,0.2)", "rgb(0,255,0) 2px 2px") + * @static + * @field + * @memberOf fabric.Shadow + */ + // eslint-disable-next-line max-len + fabric.Shadow.reOffsetsAndBlur = /(?:\s|^)(-?\d+(?:px)?(?:\s?|$))?(-?\d+(?:px)?(?:\s?|$))?(\d+(?:px)?)?(?:\s?|$)(?:$|\s)/; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function () { + + 'use strict'; + + if (fabric.StaticCanvas) { + fabric.warn('fabric.StaticCanvas is already defined.'); + return; + } + + // aliases for faster resolution + var extend = fabric.util.object.extend, + getElementOffset = fabric.util.getElementOffset, + removeFromArray = fabric.util.removeFromArray, + toFixed = fabric.util.toFixed, + + CANVAS_INIT_ERROR = new Error('Could not initialize `canvas` element'); + + /** + * Static canvas class + * @class fabric.StaticCanvas + * @mixes fabric.Collection + * @mixes fabric.Observable + * @see {@link http://fabricjs.com/static_canvas|StaticCanvas demo} + * @see {@link fabric.StaticCanvas#initialize} for constructor definition + * @fires before:render + * @fires after:render + * @fires canvas:cleared + * @fires object:added + * @fires object:removed + */ + fabric.StaticCanvas = fabric.util.createClass(/** @lends fabric.StaticCanvas.prototype */ { + + /** + * Constructor + * @param {HTMLElement | String} el <canvas> element to initialize instance on + * @param {Object} [options] Options object + * @return {Object} thisArg + */ + initialize: function(el, options) { + options || (options = { }); + + this._initStatic(el, options); + }, + + /** + * Background color of canvas instance. + * Should be set via {@link fabric.StaticCanvas#setBackgroundColor}. + * @type {(String|fabric.Pattern)} + * @default + */ + backgroundColor: '', + + /** + * Background image of canvas instance. + * Should be set via {@link fabric.StaticCanvas#setBackgroundImage}. + * Backwards incompatibility note: The "backgroundImageOpacity" + * and "backgroundImageStretch" properties are deprecated since 1.3.9. + * Use {@link fabric.Image#opacity}, {@link fabric.Image#width} and {@link fabric.Image#height}. + * @type fabric.Image + * @default + */ + backgroundImage: null, + + /** + * Overlay color of canvas instance. + * Should be set via {@link fabric.StaticCanvas#setOverlayColor} + * @since 1.3.9 + * @type {(String|fabric.Pattern)} + * @default + */ + overlayColor: '', + + /** + * Overlay image of canvas instance. + * Should be set via {@link fabric.StaticCanvas#setOverlayImage}. + * Backwards incompatibility note: The "overlayImageLeft" + * and "overlayImageTop" properties are deprecated since 1.3.9. + * Use {@link fabric.Image#left} and {@link fabric.Image#top}. + * @type fabric.Image + * @default + */ + overlayImage: null, + + /** + * Indicates whether toObject/toDatalessObject should include default values + * @type Boolean + * @default + */ + includeDefaultValues: true, + + /** + * Indicates whether objects' state should be saved + * @type Boolean + * @default + */ + stateful: true, + + /** + * Indicates whether {@link fabric.Collection.add}, {@link fabric.Collection.insertAt} and {@link fabric.Collection.remove} should also re-render canvas. + * Disabling this option could give a great performance boost when adding/removing a lot of objects to/from canvas at once + * (followed by a manual rendering after addition/deletion) + * @type Boolean + * @default + */ + renderOnAddRemove: true, + + /** + * Function that determines clipping of entire canvas area + * Being passed context as first argument. See clipping canvas area in {@link https://github.com/kangax/fabric.js/wiki/FAQ} + * @type Function + * @default + */ + clipTo: null, + + /** + * Indicates whether object controls (borders/controls) are rendered above overlay image + * @type Boolean + * @default + */ + controlsAboveOverlay: false, + + /** + * Indicates whether the browser can be scrolled when using a touchscreen and dragging on the canvas + * @type Boolean + * @default + */ + allowTouchScrolling: false, + + /** + * Indicates whether this canvas will use image smoothing, this is on by default in browsers + * @type Boolean + * @default + */ + imageSmoothingEnabled: true, + + /** + * The transformation (in the format of Canvas transform) which focuses the viewport + * @type Array + * @default + */ + viewportTransform: [1, 0, 0, 1, 0, 0], + + /** + * if set to false background image is not affected by viewport transform + * @since 1.6.3 + * @type Boolean + * @default + */ + backgroundVpt: true, + + /** + * if set to false overlya image is not affected by viewport transform + * @since 1.6.3 + * @type Boolean + * @default + */ + overlayVpt: true, + + /** + * Callback; invoked right before object is about to be scaled/rotated + */ + onBeforeScaleRotate: function () { + /* NOOP */ + }, + + /** + * When true, canvas is scaled by devicePixelRatio for better rendering on retina screens + */ + enableRetinaScaling: true, + + /** + * @private + * @param {HTMLElement | String} el <canvas> element to initialize instance on + * @param {Object} [options] Options object + */ + _initStatic: function(el, options) { + var cb = fabric.StaticCanvas.prototype.renderAll.bind(this); + this._objects = []; + this._createLowerCanvas(el); + this._initOptions(options); + this._setImageSmoothing(); + // only initialize retina scaling once + if (!this.interactive) { + this._initRetinaScaling(); + } + + if (options.overlayImage) { + this.setOverlayImage(options.overlayImage, cb); + } + if (options.backgroundImage) { + this.setBackgroundImage(options.backgroundImage, cb); + } + if (options.backgroundColor) { + this.setBackgroundColor(options.backgroundColor, cb); + } + if (options.overlayColor) { + this.setOverlayColor(options.overlayColor, cb); + } + this.calcOffset(); + }, + + /** + * @private + */ + _isRetinaScaling: function() { + return (fabric.devicePixelRatio !== 1 && this.enableRetinaScaling); + }, + + /** + * @private + * @return {Number} retinaScaling if applied, otherwise 1; + */ + getRetinaScaling: function() { + return this._isRetinaScaling() ? fabric.devicePixelRatio : 1; + }, + + /** + * @private + */ + _initRetinaScaling: function() { + if (!this._isRetinaScaling()) { + return; + } + this.lowerCanvasEl.setAttribute('width', this.width * fabric.devicePixelRatio); + this.lowerCanvasEl.setAttribute('height', this.height * fabric.devicePixelRatio); + + this.contextContainer.scale(fabric.devicePixelRatio, fabric.devicePixelRatio); + }, + + /** + * Calculates canvas element offset relative to the document + * This method is also attached as "resize" event handler of window + * @return {fabric.Canvas} instance + * @chainable + */ + calcOffset: function () { + this._offset = getElementOffset(this.lowerCanvasEl); + return this; + }, + + /** + * Sets {@link fabric.StaticCanvas#overlayImage|overlay image} for this canvas + * @param {(fabric.Image|String)} image fabric.Image instance or URL of an image to set overlay to + * @param {Function} callback callback to invoke when image is loaded and set as an overlay + * @param {Object} [options] Optional options to set for the {@link fabric.Image|overlay image}. + * @return {fabric.Canvas} thisArg + * @chainable + * @see {@link http://jsfiddle.net/fabricjs/MnzHT/|jsFiddle demo} + * @example Normal overlayImage with left/top = 0 + * canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), { + * // Needed to position overlayImage at 0/0 + * originX: 'left', + * originY: 'top' + * }); + * @example overlayImage with different properties + * canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), { + * opacity: 0.5, + * angle: 45, + * left: 400, + * top: 400, + * originX: 'left', + * originY: 'top' + * }); + * @example Stretched overlayImage #1 - width/height correspond to canvas width/height + * fabric.Image.fromURL('http://fabricjs.com/assets/jail_cell_bars.png', function(img) { + * img.set({width: canvas.width, height: canvas.height, originX: 'left', originY: 'top'}); + * canvas.setOverlayImage(img, canvas.renderAll.bind(canvas)); + * }); + * @example Stretched overlayImage #2 - width/height correspond to canvas width/height + * canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), { + * width: canvas.width, + * height: canvas.height, + * // Needed to position overlayImage at 0/0 + * originX: 'left', + * originY: 'top' + * }); + * @example overlayImage loaded from cross-origin + * canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), { + * opacity: 0.5, + * angle: 45, + * left: 400, + * top: 400, + * originX: 'left', + * originY: 'top', + * crossOrigin: 'anonymous' + * }); + */ + setOverlayImage: function (image, callback, options) { + return this.__setBgOverlayImage('overlayImage', image, callback, options); + }, + + /** + * Sets {@link fabric.StaticCanvas#backgroundImage|background image} for this canvas + * @param {(fabric.Image|String)} image fabric.Image instance or URL of an image to set background to + * @param {Function} callback Callback to invoke when image is loaded and set as background + * @param {Object} [options] Optional options to set for the {@link fabric.Image|background image}. + * @return {fabric.Canvas} thisArg + * @chainable + * @see {@link http://jsfiddle.net/fabricjs/YH9yD/|jsFiddle demo} + * @example Normal backgroundImage with left/top = 0 + * canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), { + * // Needed to position backgroundImage at 0/0 + * originX: 'left', + * originY: 'top' + * }); + * @example backgroundImage with different properties + * canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), { + * opacity: 0.5, + * angle: 45, + * left: 400, + * top: 400, + * originX: 'left', + * originY: 'top' + * }); + * @example Stretched backgroundImage #1 - width/height correspond to canvas width/height + * fabric.Image.fromURL('http://fabricjs.com/assets/honey_im_subtle.png', function(img) { + * img.set({width: canvas.width, height: canvas.height, originX: 'left', originY: 'top'}); + * canvas.setBackgroundImage(img, canvas.renderAll.bind(canvas)); + * }); + * @example Stretched backgroundImage #2 - width/height correspond to canvas width/height + * canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), { + * width: canvas.width, + * height: canvas.height, + * // Needed to position backgroundImage at 0/0 + * originX: 'left', + * originY: 'top' + * }); + * @example backgroundImage loaded from cross-origin + * canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), { + * opacity: 0.5, + * angle: 45, + * left: 400, + * top: 400, + * originX: 'left', + * originY: 'top', + * crossOrigin: 'anonymous' + * }); + */ + setBackgroundImage: function (image, callback, options) { + return this.__setBgOverlayImage('backgroundImage', image, callback, options); + }, + + /** + * Sets {@link fabric.StaticCanvas#overlayColor|background color} for this canvas + * @param {(String|fabric.Pattern)} overlayColor Color or pattern to set background color to + * @param {Function} callback Callback to invoke when background color is set + * @return {fabric.Canvas} thisArg + * @chainable + * @see {@link http://jsfiddle.net/fabricjs/pB55h/|jsFiddle demo} + * @example Normal overlayColor - color value + * canvas.setOverlayColor('rgba(255, 73, 64, 0.6)', canvas.renderAll.bind(canvas)); + * @example fabric.Pattern used as overlayColor + * canvas.setOverlayColor({ + * source: 'http://fabricjs.com/assets/escheresque_ste.png' + * }, canvas.renderAll.bind(canvas)); + * @example fabric.Pattern used as overlayColor with repeat and offset + * canvas.setOverlayColor({ + * source: 'http://fabricjs.com/assets/escheresque_ste.png', + * repeat: 'repeat', + * offsetX: 200, + * offsetY: 100 + * }, canvas.renderAll.bind(canvas)); + */ + setOverlayColor: function(overlayColor, callback) { + return this.__setBgOverlayColor('overlayColor', overlayColor, callback); + }, + + /** + * Sets {@link fabric.StaticCanvas#backgroundColor|background color} for this canvas + * @param {(String|fabric.Pattern)} backgroundColor Color or pattern to set background color to + * @param {Function} callback Callback to invoke when background color is set + * @return {fabric.Canvas} thisArg + * @chainable + * @see {@link http://jsfiddle.net/fabricjs/hXzvk/|jsFiddle demo} + * @example Normal backgroundColor - color value + * canvas.setBackgroundColor('rgba(255, 73, 64, 0.6)', canvas.renderAll.bind(canvas)); + * @example fabric.Pattern used as backgroundColor + * canvas.setBackgroundColor({ + * source: 'http://fabricjs.com/assets/escheresque_ste.png' + * }, canvas.renderAll.bind(canvas)); + * @example fabric.Pattern used as backgroundColor with repeat and offset + * canvas.setBackgroundColor({ + * source: 'http://fabricjs.com/assets/escheresque_ste.png', + * repeat: 'repeat', + * offsetX: 200, + * offsetY: 100 + * }, canvas.renderAll.bind(canvas)); + */ + setBackgroundColor: function(backgroundColor, callback) { + return this.__setBgOverlayColor('backgroundColor', backgroundColor, callback); + }, + + /** + * @private + * @see {@link http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-imagesmoothingenabled|WhatWG Canvas Standard} + */ + _setImageSmoothing: function() { + var ctx = this.getContext(); + + ctx.imageSmoothingEnabled = ctx.imageSmoothingEnabled || ctx.webkitImageSmoothingEnabled + || ctx.mozImageSmoothingEnabled || ctx.msImageSmoothingEnabled || ctx.oImageSmoothingEnabled; + ctx.imageSmoothingEnabled = this.imageSmoothingEnabled; + }, + + /** + * @private + * @param {String} property Property to set ({@link fabric.StaticCanvas#backgroundImage|backgroundImage} + * or {@link fabric.StaticCanvas#overlayImage|overlayImage}) + * @param {(fabric.Image|String|null)} image fabric.Image instance, URL of an image or null to set background or overlay to + * @param {Function} callback Callback to invoke when image is loaded and set as background or overlay + * @param {Object} [options] Optional options to set for the {@link fabric.Image|image}. + */ + __setBgOverlayImage: function(property, image, callback, options) { + if (typeof image === 'string') { + fabric.util.loadImage(image, function(img) { + img && (this[property] = new fabric.Image(img, options)); + callback && callback(img); + }, this, options && options.crossOrigin); + } + else { + options && image.setOptions(options); + this[property] = image; + callback && callback(image); + } + + return this; + }, + + /** + * @private + * @param {String} property Property to set ({@link fabric.StaticCanvas#backgroundColor|backgroundColor} + * or {@link fabric.StaticCanvas#overlayColor|overlayColor}) + * @param {(Object|String|null)} color Object with pattern information, color value or null + * @param {Function} [callback] Callback is invoked when color is set + */ + __setBgOverlayColor: function(property, color, callback) { + if (color && color.source) { + var _this = this; + fabric.util.loadImage(color.source, function(img) { + _this[property] = new fabric.Pattern({ + source: img, + repeat: color.repeat, + offsetX: color.offsetX, + offsetY: color.offsetY + }); + callback && callback(); + }); + } + else { + this[property] = color; + callback && callback(); + } + + return this; + }, + + /** + * @private + */ + _createCanvasElement: function(canvasEl) { + var element = fabric.util.createCanvasElement(canvasEl) + if (!element.style) { + element.style = { }; + } + if (!element) { + throw CANVAS_INIT_ERROR; + } + if (typeof element.getContext === 'undefined') { + throw CANVAS_INIT_ERROR; + } + return element; + }, + + /** + * @private + * @param {Object} [options] Options object + */ + _initOptions: function (options) { + for (var prop in options) { + this[prop] = options[prop]; + } + + this.width = this.width || parseInt(this.lowerCanvasEl.width, 10) || 0; + this.height = this.height || parseInt(this.lowerCanvasEl.height, 10) || 0; + + if (!this.lowerCanvasEl.style) { + return; + } + + this.lowerCanvasEl.width = this.width; + this.lowerCanvasEl.height = this.height; + + this.lowerCanvasEl.style.width = this.width + 'px'; + this.lowerCanvasEl.style.height = this.height + 'px'; + + this.viewportTransform = this.viewportTransform.slice(); + }, + + /** + * Creates a bottom canvas + * @private + * @param {HTMLElement} [canvasEl] + */ + _createLowerCanvas: function (canvasEl) { + this.lowerCanvasEl = fabric.util.getById(canvasEl) || this._createCanvasElement(canvasEl); + + fabric.util.addClass(this.lowerCanvasEl, 'lower-canvas'); + + if (this.interactive) { + this._applyCanvasStyle(this.lowerCanvasEl); + } + + this.contextContainer = this.lowerCanvasEl.getContext('2d'); + }, + + /** + * Returns canvas width (in px) + * @return {Number} + */ + getWidth: function () { + return this.width; + }, + + /** + * Returns canvas height (in px) + * @return {Number} + */ + getHeight: function () { + return this.height; + }, + + /** + * Sets width of this canvas instance + * @param {Number|String} value Value to set width to + * @param {Object} [options] Options object + * @param {Boolean} [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions + * @param {Boolean} [options.cssOnly=false] Set the given dimensions only as css dimensions + * @return {fabric.Canvas} instance + * @chainable true + */ + setWidth: function (value, options) { + return this.setDimensions({ width: value }, options); + }, + + /** + * Sets height of this canvas instance + * @param {Number|String} value Value to set height to + * @param {Object} [options] Options object + * @param {Boolean} [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions + * @param {Boolean} [options.cssOnly=false] Set the given dimensions only as css dimensions + * @return {fabric.Canvas} instance + * @chainable true + */ + setHeight: function (value, options) { + return this.setDimensions({ height: value }, options); + }, + + /** + * Sets dimensions (width, height) of this canvas instance. when options.cssOnly flag active you should also supply the unit of measure (px/%/em) + * @param {Object} dimensions Object with width/height properties + * @param {Number|String} [dimensions.width] Width of canvas element + * @param {Number|String} [dimensions.height] Height of canvas element + * @param {Object} [options] Options object + * @param {Boolean} [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions + * @param {Boolean} [options.cssOnly=false] Set the given dimensions only as css dimensions + * @return {fabric.Canvas} thisArg + * @chainable + */ + setDimensions: function (dimensions, options) { + var cssValue; + + options = options || {}; + + for (var prop in dimensions) { + cssValue = dimensions[prop]; + + if (!options.cssOnly) { + this._setBackstoreDimension(prop, dimensions[prop]); + cssValue += 'px'; + } + + if (!options.backstoreOnly) { + this._setCssDimension(prop, cssValue); + } + } + this._initRetinaScaling(); + this._setImageSmoothing(); + this.calcOffset(); + + if (!options.cssOnly) { + this.renderAll(); + } + + return this; + }, + + /** + * Helper for setting width/height + * @private + * @param {String} prop property (width|height) + * @param {Number} value value to set property to + * @return {fabric.Canvas} instance + * @chainable true + */ + _setBackstoreDimension: function (prop, value) { + this.lowerCanvasEl[prop] = value; + + if (this.upperCanvasEl) { + this.upperCanvasEl[prop] = value; + } + + if (this.cacheCanvasEl) { + this.cacheCanvasEl[prop] = value; + } + + this[prop] = value; + + return this; + }, + + /** + * Helper for setting css width/height + * @private + * @param {String} prop property (width|height) + * @param {String} value value to set property to + * @return {fabric.Canvas} instance + * @chainable true + */ + _setCssDimension: function (prop, value) { + this.lowerCanvasEl.style[prop] = value; + + if (this.upperCanvasEl) { + this.upperCanvasEl.style[prop] = value; + } + + if (this.wrapperEl) { + this.wrapperEl.style[prop] = value; + } + + return this; + }, + + /** + * Returns canvas zoom level + * @return {Number} + */ + getZoom: function () { + return Math.sqrt(this.viewportTransform[0] * this.viewportTransform[3]); + }, + + /** + * Sets viewport transform of this canvas instance + * @param {Array} vpt the transform in the form of context.transform + * @return {fabric.Canvas} instance + * @chainable true + */ + setViewportTransform: function (vpt) { + var activeGroup = this._activeGroup, object; + this.viewportTransform = vpt; + for (var i = 0, len = this._objects.length; i < len; i++) { + object = this._objects[i]; + object.group || object.setCoords(); + } + if (activeGroup) { + activeGroup.setCoords(); + } + this.renderAll(); + return this; + }, + + /** + * Sets zoom level of this canvas instance, zoom centered around point + * @param {fabric.Point} point to zoom with respect to + * @param {Number} value to set zoom to, less than 1 zooms out + * @return {fabric.Canvas} instance + * @chainable true + */ + zoomToPoint: function (point, value) { + // TODO: just change the scale, preserve other transformations + var before = point, vpt = this.viewportTransform.slice(0); + point = fabric.util.transformPoint(point, fabric.util.invertTransform(this.viewportTransform)); + vpt[0] = value; + vpt[3] = value; + var after = fabric.util.transformPoint(point, vpt); + vpt[4] += before.x - after.x; + vpt[5] += before.y - after.y; + return this.setViewportTransform(vpt); + }, + + /** + * Sets zoom level of this canvas instance + * @param {Number} value to set zoom to, less than 1 zooms out + * @return {fabric.Canvas} instance + * @chainable true + */ + setZoom: function (value) { + this.zoomToPoint(new fabric.Point(0, 0), value); + return this; + }, + + /** + * Pan viewport so as to place point at top left corner of canvas + * @param {fabric.Point} point to move to + * @return {fabric.Canvas} instance + * @chainable true + */ + absolutePan: function (point) { + var vpt = this.viewportTransform.slice(0); + vpt[4] = -point.x; + vpt[5] = -point.y; + return this.setViewportTransform(vpt); + }, + + /** + * Pans viewpoint relatively + * @param {fabric.Point} point (position vector) to move by + * @return {fabric.Canvas} instance + * @chainable true + */ + relativePan: function (point) { + return this.absolutePan(new fabric.Point( + -point.x - this.viewportTransform[4], + -point.y - this.viewportTransform[5] + )); + }, + + /** + * Returns <canvas> element corresponding to this instance + * @return {HTMLCanvasElement} + */ + getElement: function () { + return this.lowerCanvasEl; + }, + + /** + * @private + * @param {fabric.Object} obj Object that was added + */ + _onObjectAdded: function(obj) { + this.stateful && obj.setupState(); + obj._set('canvas', this); + obj.setCoords(); + this.fire('object:added', { target: obj }); + obj.fire('added'); + }, + + /** + * @private + * @param {fabric.Object} obj Object that was removed + */ + _onObjectRemoved: function(obj) { + this.fire('object:removed', { target: obj }); + obj.fire('removed'); + delete obj.canvas; + }, + + /** + * Clears specified context of canvas element + * @param {CanvasRenderingContext2D} ctx Context to clear + * @return {fabric.Canvas} thisArg + * @chainable + */ + clearContext: function(ctx) { + ctx.clearRect(0, 0, this.width, this.height); + return this; + }, + + /** + * Returns context of canvas where objects are drawn + * @return {CanvasRenderingContext2D} + */ + getContext: function () { + return this.contextContainer; + }, + + /** + * Clears all contexts (background, main, top) of an instance + * @return {fabric.Canvas} thisArg + * @chainable + */ + clear: function () { + this._objects.length = 0; + this.backgroundImage = null; + this.overlayImage = null; + this.backgroundColor = ''; + this.overlayColor = '' + if (this._hasITextHandlers) { + this.off('selection:cleared', this._canvasITextSelectionClearedHanlder); + this.off('object:selected', this._canvasITextSelectionClearedHanlder); + this.off('mouse:up', this._mouseUpITextHandler); + this._iTextInstances = null; + this._hasITextHandlers = false; + } + this.clearContext(this.contextContainer); + this.fire('canvas:cleared'); + this.renderAll(); + return this; + }, + + /** + * Renders both the canvas. + * @return {fabric.Canvas} instance + * @chainable + */ + renderAll: function () { + var canvasToDrawOn = this.contextContainer; + this.renderCanvas(canvasToDrawOn, this._objects); + return this; + }, + + /** + * Renders background, objects, overlay and controls. + * @param {CanvasRenderingContext2D} ctx + * @param {Array} objects to render + * @return {fabric.Canvas} instance + * @chainable + */ + renderCanvas: function(ctx, objects) { + this.clearContext(ctx); + this.fire('before:render'); + if (this.clipTo) { + fabric.util.clipContext(this, ctx); + } + this._renderBackground(ctx); + + ctx.save(); + //apply viewport transform once for all rendering process + ctx.transform.apply(ctx, this.viewportTransform); + this._renderObjects(ctx, objects); + ctx.restore(); + if (!this.controlsAboveOverlay && this.interactive) { + this.drawControls(ctx); + } + if (this.clipTo) { + ctx.restore(); + } + this._renderOverlay(ctx); + if (this.controlsAboveOverlay && this.interactive) { + this.drawControls(ctx); + } + this.fire('after:render'); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Array} objects to render + */ + _renderObjects: function(ctx, objects) { + for (var i = 0, length = objects.length; i < length; ++i) { + objects[i] && objects[i].render(ctx); + } + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {string} property 'background' or 'overlay' + */ + _renderBackgroundOrOverlay: function(ctx, property) { + var object = this[property + 'Color']; + if (object) { + ctx.fillStyle = object.toLive + ? object.toLive(ctx) + : object; + + ctx.fillRect( + object.offsetX || 0, + object.offsetY || 0, + this.width, + this.height); + } + object = this[property + 'Image']; + if (object) { + if (this[property + 'Vpt']) { + ctx.save(); + ctx.transform.apply(ctx, this.viewportTransform); + } + object.render(ctx); + this[property + 'Vpt'] && ctx.restore(); + } + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderBackground: function(ctx) { + this._renderBackgroundOrOverlay(ctx, 'background'); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderOverlay: function(ctx) { + this._renderBackgroundOrOverlay(ctx, 'overlay'); + }, + + /** + * Returns coordinates of a center of canvas. + * Returned value is an object with top and left properties + * @return {Object} object with "top" and "left" number values + */ + getCenter: function () { + return { + top: this.getHeight() / 2, + left: this.getWidth() / 2 + }; + }, + + /** + * Centers object horizontally in the canvas + * You might need to call `setCoords` on an object after centering, to update controls area. + * @param {fabric.Object} object Object to center horizontally + * @return {fabric.Canvas} thisArg + */ + centerObjectH: function (object) { + return this._centerObject(object, new fabric.Point(this.getCenter().left, object.getCenterPoint().y)); + }, + + /** + * Centers object vertically in the canvas + * You might need to call `setCoords` on an object after centering, to update controls area. + * @param {fabric.Object} object Object to center vertically + * @return {fabric.Canvas} thisArg + * @chainable + */ + centerObjectV: function (object) { + return this._centerObject(object, new fabric.Point(object.getCenterPoint().x, this.getCenter().top)); + }, + + /** + * Centers object vertically and horizontally in the canvas + * You might need to call `setCoords` on an object after centering, to update controls area. + * @param {fabric.Object} object Object to center vertically and horizontally + * @return {fabric.Canvas} thisArg + * @chainable + */ + centerObject: function(object) { + var center = this.getCenter(); + + return this._centerObject(object, new fabric.Point(center.left, center.top)); + }, + + /** + * Centers object vertically and horizontally in the viewport + * You might need to call `setCoords` on an object after centering, to update controls area. + * @param {fabric.Object} object Object to center vertically and horizontally + * @return {fabric.Canvas} thisArg + * @chainable + */ + viewportCenterObject: function(object) { + var vpCenter = this.getVpCenter(); + + return this._centerObject(object, vpCenter); + }, + + /** + * Centers object horizontally in the viewport, object.top is unchanged + * You might need to call `setCoords` on an object after centering, to update controls area. + * @param {fabric.Object} object Object to center vertically and horizontally + * @return {fabric.Canvas} thisArg + * @chainable + */ + viewportCenterObjectH: function(object) { + var vpCenter = this.getVpCenter(); + this._centerObject(object, new fabric.Point(vpCenter.x, object.getCenterPoint().y)); + return this; + }, + + /** + * Centers object Vertically in the viewport, object.top is unchanged + * You might need to call `setCoords` on an object after centering, to update controls area. + * @param {fabric.Object} object Object to center vertically and horizontally + * @return {fabric.Canvas} thisArg + * @chainable + */ + viewportCenterObjectV: function(object) { + var vpCenter = this.getVpCenter(); + + return this._centerObject(object, new fabric.Point(object.getCenterPoint().x, vpCenter.y)); + }, + + /** + * Calculate the point in canvas that correspond to the center of actual viewport. + * @return {fabric.Point} vpCenter, viewport center + * @chainable + */ + getVpCenter: function() { + var center = this.getCenter(), + iVpt = fabric.util.invertTransform(this.viewportTransform); + return fabric.util.transformPoint({ x: center.left, y: center.top }, iVpt); + }, + + /** + * @private + * @param {fabric.Object} object Object to center + * @param {fabric.Point} center Center point + * @return {fabric.Canvas} thisArg + * @chainable + */ + _centerObject: function(object, center) { + object.setPositionByOrigin(center, 'center', 'center'); + this.renderAll(); + return this; + }, + + /** + * Returs dataless JSON representation of canvas + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {String} json string + */ + toDatalessJSON: function (propertiesToInclude) { + return this.toDatalessObject(propertiesToInclude); + }, + + /** + * Returns object representation of canvas + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function (propertiesToInclude) { + return this._toObjectMethod('toObject', propertiesToInclude); + }, + + /** + * Returns dataless object representation of canvas + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toDatalessObject: function (propertiesToInclude) { + return this._toObjectMethod('toDatalessObject', propertiesToInclude); + }, + + /** + * @private + */ + _toObjectMethod: function (methodName, propertiesToInclude) { + + var data = { + objects: this._toObjects(methodName, propertiesToInclude) + }; + + extend(data, this.__serializeBgOverlay(methodName, propertiesToInclude)); + + fabric.util.populateWithProperties(this, data, propertiesToInclude); + + return data; + }, + + /** + * @private + */ + _toObjects: function(methodName, propertiesToInclude) { + return this.getObjects().filter(function(object) { + return !object.excludeFromExport; + }).map(function(instance) { + return this._toObject(instance, methodName, propertiesToInclude); + }, this); + }, + + /** + * @private + */ + _toObject: function(instance, methodName, propertiesToInclude) { + var originalValue; + + if (!this.includeDefaultValues) { + originalValue = instance.includeDefaultValues; + instance.includeDefaultValues = false; + } + + var object = instance[methodName](propertiesToInclude); + if (!this.includeDefaultValues) { + instance.includeDefaultValues = originalValue; + } + return object; + }, + + /** + * @private + */ + __serializeBgOverlay: function(methodName, propertiesToInclude) { + var data = { + background: (this.backgroundColor && this.backgroundColor.toObject) + ? this.backgroundColor.toObject(propertiesToInclude) + : this.backgroundColor + }; + + if (this.overlayColor) { + data.overlay = this.overlayColor.toObject + ? this.overlayColor.toObject(propertiesToInclude) + : this.overlayColor; + } + if (this.backgroundImage) { + data.backgroundImage = this._toObject(this.backgroundImage, methodName, propertiesToInclude); + } + if (this.overlayImage) { + data.overlayImage = this._toObject(this.overlayImage, methodName, propertiesToInclude); + } + + return data; + }, + + /* _TO_SVG_START_ */ + /** + * When true, getSvgTransform() will apply the StaticCanvas.viewportTransform to the SVG transformation. When true, + * a zoomed canvas will then produce zoomed SVG output. + * @type Boolean + * @default + */ + svgViewportTransformation: true, + + /** + * Returns SVG representation of canvas + * @function + * @param {Object} [options] Options object for SVG output + * @param {Boolean} [options.suppressPreamble=false] If true xml tag is not included + * @param {Object} [options.viewBox] SVG viewbox object + * @param {Number} [options.viewBox.x] x-cooridnate of viewbox + * @param {Number} [options.viewBox.y] y-coordinate of viewbox + * @param {Number} [options.viewBox.width] Width of viewbox + * @param {Number} [options.viewBox.height] Height of viewbox + * @param {String} [options.encoding=UTF-8] Encoding of SVG output + * @param {String} [options.width] desired width of svg with or without units + * @param {String} [options.height] desired height of svg with or without units + * @param {Function} [reviver] Method for further parsing of svg elements, called after each fabric object converted into svg representation. + * @return {String} SVG string + * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#serialization} + * @see {@link http://jsfiddle.net/fabricjs/jQ3ZZ/|jsFiddle demo} + * @example Normal SVG output + * var svg = canvas.toSVG(); + * @example SVG output without preamble (without <?xml ../>) + * var svg = canvas.toSVG({suppressPreamble: true}); + * @example SVG output with viewBox attribute + * var svg = canvas.toSVG({ + * viewBox: { + * x: 100, + * y: 100, + * width: 200, + * height: 300 + * } + * }); + * @example SVG output with different encoding (default: UTF-8) + * var svg = canvas.toSVG({encoding: 'ISO-8859-1'}); + * @example Modify SVG output with reviver function + * var svg = canvas.toSVG(null, function(svg) { + * return svg.replace('stroke-dasharray: ; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 10; ', ''); + * }); + */ + toSVG: function(options, reviver) { + options || (options = { }); + + var markup = []; + + this._setSVGPreamble(markup, options); + this._setSVGHeader(markup, options); + + this._setSVGBgOverlayColor(markup, 'backgroundColor'); + this._setSVGBgOverlayImage(markup, 'backgroundImage', reviver); + + this._setSVGObjects(markup, reviver); + + this._setSVGBgOverlayColor(markup, 'overlayColor'); + this._setSVGBgOverlayImage(markup, 'overlayImage', reviver); + + markup.push(''); + + return markup.join(''); + }, + + /** + * @private + */ + _setSVGPreamble: function(markup, options) { + if (options.suppressPreamble) { + return; + } + markup.push( + '\n', + '\n' + ); + }, + + /** + * @private + */ + _setSVGHeader: function(markup, options) { + var width = options.width || this.width, + height = options.height || this.height, + vpt, viewBox = 'viewBox="0 0 ' + this.width + ' ' + this.height + '" ', + NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS; + + if (options.viewBox) { + viewBox = 'viewBox="' + + options.viewBox.x + ' ' + + options.viewBox.y + ' ' + + options.viewBox.width + ' ' + + options.viewBox.height + '" '; + } + else { + if (this.svgViewportTransformation) { + vpt = this.viewportTransform; + viewBox = 'viewBox="' + + toFixed(-vpt[4] / vpt[0], NUM_FRACTION_DIGITS) + ' ' + + toFixed(-vpt[5] / vpt[3], NUM_FRACTION_DIGITS) + ' ' + + toFixed(this.width / vpt[0], NUM_FRACTION_DIGITS) + ' ' + + toFixed(this.height / vpt[3], NUM_FRACTION_DIGITS) + '" '; + } + } + + markup.push( + '\n', + 'Created with Fabric.js ', fabric.version, '\n', + '', + fabric.createSVGFontFacesMarkup(this.getObjects()), + fabric.createSVGRefElementsMarkup(this), + '\n' + ); + }, + + /** + * @private + */ + _setSVGObjects: function(markup, reviver) { + var instance; + for (var i = 0, objects = this.getObjects(), len = objects.length; i < len; i++) { + instance = objects[i]; + if (instance.excludeFromExport) { + continue; + } + this._setSVGObject(markup, instance, reviver); + } + }, + + /** + * push single object svg representation in the markup + * @private + */ + _setSVGObject: function(markup, instance, reviver) { + markup.push(instance.toSVG(reviver)); + }, + + /** + * @private + */ + _setSVGBgOverlayImage: function(markup, property, reviver) { + if (this[property] && this[property].toSVG) { + markup.push(this[property].toSVG(reviver)); + } + }, + + /** + * @private + */ + _setSVGBgOverlayColor: function(markup, property) { + if (this[property] && this[property].source) { + markup.push( + '\n' + ); + } + else if (this[property] && property === 'overlayColor') { + markup.push( + '\n' + ); + } + }, + /* _TO_SVG_END_ */ + + /** + * Moves an object or the objects of a multiple selection + * to the bottom of the stack of drawn objects + * @param {fabric.Object} object Object to send to back + * @return {fabric.Canvas} thisArg + * @chainable + */ + sendToBack: function (object) { + if (!object) { + return this; + } + var activeGroup = this._activeGroup, + i, obj, objs; + if (object === activeGroup) { + objs = activeGroup._objects; + for (i = objs.length; i--;) { + obj = objs[i]; + removeFromArray(this._objects, obj); + this._objects.unshift(obj); + } + } + else { + removeFromArray(this._objects, object); + this._objects.unshift(object); + } + return this.renderAll && this.renderAll(); + }, + + /** + * Moves an object or the objects of a multiple selection + * to the top of the stack of drawn objects + * @param {fabric.Object} object Object to send + * @return {fabric.Canvas} thisArg + * @chainable + */ + bringToFront: function (object) { + if (!object) { + return this; + } + var activeGroup = this._activeGroup, + i, obj, objs; + if (object === activeGroup) { + objs = activeGroup._objects; + for (i = 0; i < objs.length; i++) { + obj = objs[i]; + removeFromArray(this._objects, obj); + this._objects.push(obj); + } + } + else { + removeFromArray(this._objects, object); + this._objects.push(object); + } + return this.renderAll && this.renderAll(); + }, + + /** + * Moves an object or a selection down in stack of drawn objects + * @param {fabric.Object} object Object to send + * @param {Boolean} [intersecting] If `true`, send object behind next lower intersecting object + * @return {fabric.Canvas} thisArg + * @chainable + */ + sendBackwards: function (object, intersecting) { + if (!object) { + return this; + } + var activeGroup = this._activeGroup, + i, obj, idx, newIdx, objs; + + if (object === activeGroup) { + objs = activeGroup._objects; + for (i = 0; i < objs.length; i++) { + obj = objs[i]; + idx = this._objects.indexOf(obj); + if (idx !== 0) { + newIdx = idx - 1; + removeFromArray(this._objects, obj); + this._objects.splice(newIdx, 0, obj); + } + } + } + else { + idx = this._objects.indexOf(object); + if (idx !== 0) { + // if object is not on the bottom of stack + newIdx = this._findNewLowerIndex(object, idx, intersecting); + removeFromArray(this._objects, object); + this._objects.splice(newIdx, 0, object); + } + } + this.renderAll && this.renderAll(); + return this; + }, + + /** + * @private + */ + _findNewLowerIndex: function(object, idx, intersecting) { + var newIdx; + + if (intersecting) { + newIdx = idx; + + // traverse down the stack looking for the nearest intersecting object + for (var i = idx - 1; i >= 0; --i) { + + var isIntersecting = object.intersectsWithObject(this._objects[i]) || + object.isContainedWithinObject(this._objects[i]) || + this._objects[i].isContainedWithinObject(object); + + if (isIntersecting) { + newIdx = i; + break; + } + } + } + else { + newIdx = idx - 1; + } + + return newIdx; + }, + + /** + * Moves an object or a selection up in stack of drawn objects + * @param {fabric.Object} object Object to send + * @param {Boolean} [intersecting] If `true`, send object in front of next upper intersecting object + * @return {fabric.Canvas} thisArg + * @chainable + */ + bringForward: function (object, intersecting) { + if (!object) { + return this; + } + var activeGroup = this._activeGroup, + i, obj, idx, newIdx, objs; + + if (object === activeGroup) { + objs = activeGroup._objects; + for (i = objs.length; i--;) { + obj = objs[i]; + idx = this._objects.indexOf(obj); + if (idx !== this._objects.length - 1) { + newIdx = idx + 1; + removeFromArray(this._objects, obj); + this._objects.splice(newIdx, 0, obj); + } + } + } + else { + idx = this._objects.indexOf(object); + if (idx !== this._objects.length - 1) { + // if object is not on top of stack (last item in an array) + newIdx = this._findNewUpperIndex(object, idx, intersecting); + removeFromArray(this._objects, object); + this._objects.splice(newIdx, 0, object); + } + } + this.renderAll && this.renderAll(); + return this; + }, + + /** + * @private + */ + _findNewUpperIndex: function(object, idx, intersecting) { + var newIdx; + + if (intersecting) { + newIdx = idx; + + // traverse up the stack looking for the nearest intersecting object + for (var i = idx + 1; i < this._objects.length; ++i) { + + var isIntersecting = object.intersectsWithObject(this._objects[i]) || + object.isContainedWithinObject(this._objects[i]) || + this._objects[i].isContainedWithinObject(object); + + if (isIntersecting) { + newIdx = i; + break; + } + } + } + else { + newIdx = idx + 1; + } + + return newIdx; + }, + + /** + * Moves an object to specified level in stack of drawn objects + * @param {fabric.Object} object Object to send + * @param {Number} index Position to move to + * @return {fabric.Canvas} thisArg + * @chainable + */ + moveTo: function (object, index) { + removeFromArray(this._objects, object); + this._objects.splice(index, 0, object); + return this.renderAll && this.renderAll(); + }, + + /** + * Clears a canvas element and removes all event listeners + * @return {fabric.Canvas} thisArg + * @chainable + */ + dispose: function () { + this.clear(); + return this; + }, + + /** + * Returns a string representation of an instance + * @return {String} string representation of an instance + */ + toString: function () { + return '#'; + } + }); + + extend(fabric.StaticCanvas.prototype, fabric.Observable); + extend(fabric.StaticCanvas.prototype, fabric.Collection); + extend(fabric.StaticCanvas.prototype, fabric.DataURLExporter); + + extend(fabric.StaticCanvas, /** @lends fabric.StaticCanvas */ { + + /** + * @static + * @type String + * @default + */ + EMPTY_JSON: '{"objects": [], "background": "white"}', + + /** + * Provides a way to check support of some of the canvas methods + * (either those of HTMLCanvasElement itself, or rendering context) + * + * @param {String} methodName Method to check support for; + * Could be one of "getImageData", "toDataURL", "toDataURLWithQuality" or "setLineDash" + * @return {Boolean | null} `true` if method is supported (or at least exists), + * `null` if canvas element or context can not be initialized + */ + supports: function (methodName) { + var el = fabric.util.createCanvasElement(); + + if (!el || !el.getContext) { + return null; + } + + var ctx = el.getContext('2d'); + if (!ctx) { + return null; + } + + switch (methodName) { + + case 'getImageData': + return typeof ctx.getImageData !== 'undefined'; + + case 'setLineDash': + return typeof ctx.setLineDash !== 'undefined'; + + case 'toDataURL': + return typeof el.toDataURL !== 'undefined'; + + case 'toDataURLWithQuality': + try { + el.toDataURL('image/jpeg', 0); + return true; + } + catch (e) { } + return false; + + default: + return null; + } + } + }); + + /** + * Returns JSON representation of canvas + * @function + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {String} JSON string + * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#serialization} + * @see {@link http://jsfiddle.net/fabricjs/pec86/|jsFiddle demo} + * @example JSON without additional properties + * var json = canvas.toJSON(); + * @example JSON with additional properties included + * var json = canvas.toJSON(['lockMovementX', 'lockMovementY', 'lockRotation', 'lockScalingX', 'lockScalingY', 'lockUniScaling']); + * @example JSON without default values + * canvas.includeDefaultValues = false; + * var json = canvas.toJSON(); + */ + fabric.StaticCanvas.prototype.toJSON = fabric.StaticCanvas.prototype.toObject; + +})(); + + +/** + * BaseBrush class + * @class fabric.BaseBrush + * @see {@link http://fabricjs.com/freedrawing|Freedrawing demo} + */ +fabric.BaseBrush = fabric.util.createClass(/** @lends fabric.BaseBrush.prototype */ { + + /** + * Color of a brush + * @type String + * @default + */ + color: 'rgb(0, 0, 0)', + + /** + * Width of a brush + * @type Number + * @default + */ + width: 1, + + /** + * Shadow object representing shadow of this shape. + * Backwards incompatibility note: This property replaces "shadowColor" (String), "shadowOffsetX" (Number), + * "shadowOffsetY" (Number) and "shadowBlur" (Number) since v1.2.12 + * @type fabric.Shadow + * @default + */ + shadow: null, + + /** + * Line endings style of a brush (one of "butt", "round", "square") + * @type String + * @default + */ + strokeLineCap: 'round', + + /** + * Corner style of a brush (one of "bevil", "round", "miter") + * @type String + * @default + */ + strokeLineJoin: 'round', + + /** + * Stroke Dash Array. + * @type Array + * @default + */ + strokeDashArray: null, + + /** + * Sets shadow of an object + * @param {Object|String} [options] Options object or string (e.g. "2px 2px 10px rgba(0,0,0,0.2)") + * @return {fabric.Object} thisArg + * @chainable + */ + setShadow: function(options) { + this.shadow = new fabric.Shadow(options); + return this; + }, + + /** + * Sets brush styles + * @private + */ + _setBrushStyles: function() { + var ctx = this.canvas.contextTop; + + ctx.strokeStyle = this.color; + ctx.lineWidth = this.width; + ctx.lineCap = this.strokeLineCap; + ctx.lineJoin = this.strokeLineJoin; + if (this.strokeDashArray && fabric.StaticCanvas.supports('setLineDash')) { + ctx.setLineDash(this.strokeDashArray); + } + }, + + /** + * Sets brush shadow styles + * @private + */ + _setShadow: function() { + if (!this.shadow) { + return; + } + + var ctx = this.canvas.contextTop; + + ctx.shadowColor = this.shadow.color; + ctx.shadowBlur = this.shadow.blur; + ctx.shadowOffsetX = this.shadow.offsetX; + ctx.shadowOffsetY = this.shadow.offsetY; + }, + + /** + * Removes brush shadow styles + * @private + */ + _resetShadow: function() { + var ctx = this.canvas.contextTop; + + ctx.shadowColor = ''; + ctx.shadowBlur = ctx.shadowOffsetX = ctx.shadowOffsetY = 0; + } +}); + + +(function() { + + /** + * PencilBrush class + * @class fabric.PencilBrush + * @extends fabric.BaseBrush + */ + fabric.PencilBrush = fabric.util.createClass(fabric.BaseBrush, /** @lends fabric.PencilBrush.prototype */ { + + /** + * Constructor + * @param {fabric.Canvas} canvas + * @return {fabric.PencilBrush} Instance of a pencil brush + */ + initialize: function(canvas) { + this.canvas = canvas; + this._points = []; + }, + + /** + * Inovoked on mouse down + * @param {Object} pointer + */ + onMouseDown: function(pointer) { + this._prepareForDrawing(pointer); + // capture coordinates immediately + // this allows to draw dots (when movement never occurs) + this._captureDrawingPath(pointer); + this._render(); + }, + + /** + * Inovoked on mouse move + * @param {Object} pointer + */ + onMouseMove: function(pointer) { + this._captureDrawingPath(pointer); + // redraw curve + // clear top canvas + this.canvas.clearContext(this.canvas.contextTop); + this._render(); + }, + + /** + * Invoked on mouse up + */ + onMouseUp: function() { + this._finalizeAndAddPath(); + }, + + /** + * @private + * @param {Object} pointer Actual mouse position related to the canvas. + */ + _prepareForDrawing: function(pointer) { + + var p = new fabric.Point(pointer.x, pointer.y); + + this._reset(); + this._addPoint(p); + + this.canvas.contextTop.moveTo(p.x, p.y); + }, + + /** + * @private + * @param {fabric.Point} point Point to be added to points array + */ + _addPoint: function(point) { + this._points.push(point); + }, + + /** + * Clear points array and set contextTop canvas style. + * @private + */ + _reset: function() { + this._points.length = 0; + + this._setBrushStyles(); + this._setShadow(); + }, + + /** + * @private + * @param {Object} pointer Actual mouse position related to the canvas. + */ + _captureDrawingPath: function(pointer) { + var pointerPoint = new fabric.Point(pointer.x, pointer.y); + this._addPoint(pointerPoint); + }, + + /** + * Draw a smooth path on the topCanvas using quadraticCurveTo + * @private + */ + _render: function() { + var ctx = this.canvas.contextTop, + v = this.canvas.viewportTransform, + p1 = this._points[0], + p2 = this._points[1]; + + ctx.save(); + ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]); + ctx.beginPath(); + + //if we only have 2 points in the path and they are the same + //it means that the user only clicked the canvas without moving the mouse + //then we should be drawing a dot. A path isn't drawn between two identical dots + //that's why we set them apart a bit + if (this._points.length === 2 && p1.x === p2.x && p1.y === p2.y) { + p1.x -= 0.5; + p2.x += 0.5; + } + ctx.moveTo(p1.x, p1.y); + + for (var i = 1, len = this._points.length; i < len; i++) { + // we pick the point between pi + 1 & pi + 2 as the + // end point and p1 as our control point. + var midPoint = p1.midPointFrom(p2); + ctx.quadraticCurveTo(p1.x, p1.y, midPoint.x, midPoint.y); + + p1 = this._points[i]; + p2 = this._points[i + 1]; + } + // Draw last line as a straight line while + // we wait for the next point to be able to calculate + // the bezier control point + ctx.lineTo(p1.x, p1.y); + ctx.stroke(); + ctx.restore(); + }, + + /** + * Converts points to SVG path + * @param {Array} points Array of points + * @return {String} SVG path + */ + convertPointsToSVGPath: function(points) { + var path = [], + p1 = new fabric.Point(points[0].x, points[0].y), + p2 = new fabric.Point(points[1].x, points[1].y); + + path.push('M ', points[0].x, ' ', points[0].y, ' '); + for (var i = 1, len = points.length; i < len; i++) { + var midPoint = p1.midPointFrom(p2); + // p1 is our bezier control point + // midpoint is our endpoint + // start point is p(i-1) value. + path.push('Q ', p1.x, ' ', p1.y, ' ', midPoint.x, ' ', midPoint.y, ' '); + p1 = new fabric.Point(points[i].x, points[i].y); + if ((i + 1) < points.length) { + p2 = new fabric.Point(points[i + 1].x, points[i + 1].y); + } + } + path.push('L ', p1.x, ' ', p1.y, ' '); + return path; + }, + + /** + * Creates fabric.Path object to add on canvas + * @param {String} pathData Path data + * @return {fabric.Path} Path to add on canvas + */ + createPath: function(pathData) { + var path = new fabric.Path(pathData, { + fill: null, + stroke: this.color, + strokeWidth: this.width, + strokeLineCap: this.strokeLineCap, + strokeLineJoin: this.strokeLineJoin, + strokeDashArray: this.strokeDashArray, + originX: 'center', + originY: 'center' + }); + + if (this.shadow) { + this.shadow.affectStroke = true; + path.setShadow(this.shadow); + } + + return path; + }, + + /** + * On mouseup after drawing the path on contextTop canvas + * we use the points captured to create an new fabric path object + * and add it to the fabric canvas. + */ + _finalizeAndAddPath: function() { + var ctx = this.canvas.contextTop; + ctx.closePath(); + + var pathData = this.convertPointsToSVGPath(this._points).join(''); + if (pathData === 'M 0 0 Q 0 0 0 0 L 0 0') { + // do not create 0 width/height paths, as they are + // rendered inconsistently across browsers + // Firefox 4, for example, renders a dot, + // whereas Chrome 10 renders nothing + this.canvas.renderAll(); + return; + } + + var path = this.createPath(pathData); + + this.canvas.add(path); + path.setCoords(); + + this.canvas.clearContext(this.canvas.contextTop); + this._resetShadow(); + this.canvas.renderAll(); + + // fire event 'path' created + this.canvas.fire('path:created', { path: path }); + } + }); +})(); + + +/** + * CircleBrush class + * @class fabric.CircleBrush + */ +fabric.CircleBrush = fabric.util.createClass(fabric.BaseBrush, /** @lends fabric.CircleBrush.prototype */ { + + /** + * Width of a brush + * @type Number + * @default + */ + width: 10, + + /** + * Constructor + * @param {fabric.Canvas} canvas + * @return {fabric.CircleBrush} Instance of a circle brush + */ + initialize: function(canvas) { + this.canvas = canvas; + this.points = []; + }, + + /** + * Invoked inside on mouse down and mouse move + * @param {Object} pointer + */ + drawDot: function(pointer) { + var point = this.addPoint(pointer), + ctx = this.canvas.contextTop, + v = this.canvas.viewportTransform; + ctx.save(); + ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]); + + ctx.fillStyle = point.fill; + ctx.beginPath(); + ctx.arc(point.x, point.y, point.radius, 0, Math.PI * 2, false); + ctx.closePath(); + ctx.fill(); + + ctx.restore(); + }, + + /** + * Invoked on mouse down + */ + onMouseDown: function(pointer) { + this.points.length = 0; + this.canvas.clearContext(this.canvas.contextTop); + this._setShadow(); + this.drawDot(pointer); + }, + + /** + * Invoked on mouse move + * @param {Object} pointer + */ + onMouseMove: function(pointer) { + this.drawDot(pointer); + }, + + /** + * Invoked on mouse up + */ + onMouseUp: function() { + var originalRenderOnAddRemove = this.canvas.renderOnAddRemove; + this.canvas.renderOnAddRemove = false; + + var circles = []; + + for (var i = 0, len = this.points.length; i < len; i++) { + var point = this.points[i], + circle = new fabric.Circle({ + radius: point.radius, + left: point.x, + top: point.y, + originX: 'center', + originY: 'center', + fill: point.fill + }); + + this.shadow && circle.setShadow(this.shadow); + + circles.push(circle); + } + var group = new fabric.Group(circles, { originX: 'center', originY: 'center' }); + group.canvas = this.canvas; + + this.canvas.add(group); + this.canvas.fire('path:created', { path: group }); + + this.canvas.clearContext(this.canvas.contextTop); + this._resetShadow(); + this.canvas.renderOnAddRemove = originalRenderOnAddRemove; + this.canvas.renderAll(); + }, + + /** + * @param {Object} pointer + * @return {fabric.Point} Just added pointer point + */ + addPoint: function(pointer) { + var pointerPoint = new fabric.Point(pointer.x, pointer.y), + + circleRadius = fabric.util.getRandomInt( + Math.max(0, this.width - 20), this.width + 20) / 2, + + circleColor = new fabric.Color(this.color) + .setAlpha(fabric.util.getRandomInt(0, 100) / 100) + .toRgba(); + + pointerPoint.radius = circleRadius; + pointerPoint.fill = circleColor; + + this.points.push(pointerPoint); + + return pointerPoint; + } +}); + + +/** + * SprayBrush class + * @class fabric.SprayBrush + */ +fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric.SprayBrush.prototype */ { + + /** + * Width of a spray + * @type Number + * @default + */ + width: 10, + + /** + * Density of a spray (number of dots per chunk) + * @type Number + * @default + */ + density: 20, + + /** + * Width of spray dots + * @type Number + * @default + */ + dotWidth: 1, + + /** + * Width variance of spray dots + * @type Number + * @default + */ + dotWidthVariance: 1, + + /** + * Whether opacity of a dot should be random + * @type Boolean + * @default + */ + randomOpacity: false, + + /** + * Whether overlapping dots (rectangles) should be removed (for performance reasons) + * @type Boolean + * @default + */ + optimizeOverlapping: true, + + /** + * Constructor + * @param {fabric.Canvas} canvas + * @return {fabric.SprayBrush} Instance of a spray brush + */ + initialize: function(canvas) { + this.canvas = canvas; + this.sprayChunks = []; + }, + + /** + * Invoked on mouse down + * @param {Object} pointer + */ + onMouseDown: function(pointer) { + this.sprayChunks.length = 0; + this.canvas.clearContext(this.canvas.contextTop); + this._setShadow(); + + this.addSprayChunk(pointer); + this.render(); + }, + + /** + * Invoked on mouse move + * @param {Object} pointer + */ + onMouseMove: function(pointer) { + this.addSprayChunk(pointer); + this.render(); + }, + + /** + * Invoked on mouse up + */ + onMouseUp: function() { + var originalRenderOnAddRemove = this.canvas.renderOnAddRemove; + this.canvas.renderOnAddRemove = false; + + var rects = []; + + for (var i = 0, ilen = this.sprayChunks.length; i < ilen; i++) { + var sprayChunk = this.sprayChunks[i]; + + for (var j = 0, jlen = sprayChunk.length; j < jlen; j++) { + + var rect = new fabric.Rect({ + width: sprayChunk[j].width, + height: sprayChunk[j].width, + left: sprayChunk[j].x + 1, + top: sprayChunk[j].y + 1, + originX: 'center', + originY: 'center', + fill: this.color + }); + + this.shadow && rect.setShadow(this.shadow); + rects.push(rect); + } + } + + if (this.optimizeOverlapping) { + rects = this._getOptimizedRects(rects); + } + + var group = new fabric.Group(rects, { originX: 'center', originY: 'center' }); + group.canvas = this.canvas; + + this.canvas.add(group); + this.canvas.fire('path:created', { path: group }); + + this.canvas.clearContext(this.canvas.contextTop); + this._resetShadow(); + this.canvas.renderOnAddRemove = originalRenderOnAddRemove; + this.canvas.renderAll(); + }, + + /** + * @private + * @param {Array} rects + */ + _getOptimizedRects: function(rects) { + + // avoid creating duplicate rects at the same coordinates + var uniqueRects = { }, key; + + for (var i = 0, len = rects.length; i < len; i++) { + key = rects[i].left + '' + rects[i].top; + if (!uniqueRects[key]) { + uniqueRects[key] = rects[i]; + } + } + var uniqueRectsArray = []; + for (key in uniqueRects) { + uniqueRectsArray.push(uniqueRects[key]); + } + + return uniqueRectsArray; + }, + + /** + * Renders brush + */ + render: function() { + var ctx = this.canvas.contextTop; + ctx.fillStyle = this.color; + + var v = this.canvas.viewportTransform; + ctx.save(); + ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]); + + for (var i = 0, len = this.sprayChunkPoints.length; i < len; i++) { + var point = this.sprayChunkPoints[i]; + if (typeof point.opacity !== 'undefined') { + ctx.globalAlpha = point.opacity; + } + ctx.fillRect(point.x, point.y, point.width, point.width); + } + ctx.restore(); + }, + + /** + * @param {Object} pointer + */ + addSprayChunk: function(pointer) { + this.sprayChunkPoints = []; + + var x, y, width, radius = this.width / 2; + + for (var i = 0; i < this.density; i++) { + + x = fabric.util.getRandomInt(pointer.x - radius, pointer.x + radius); + y = fabric.util.getRandomInt(pointer.y - radius, pointer.y + radius); + + if (this.dotWidthVariance) { + width = fabric.util.getRandomInt( + // bottom clamp width to 1 + Math.max(1, this.dotWidth - this.dotWidthVariance), + this.dotWidth + this.dotWidthVariance); + } + else { + width = this.dotWidth; + } + + var point = new fabric.Point(x, y); + point.width = width; + + if (this.randomOpacity) { + point.opacity = fabric.util.getRandomInt(0, 100) / 100; + } + + this.sprayChunkPoints.push(point); + } + + this.sprayChunks.push(this.sprayChunkPoints); + } +}); + + +/** + * PatternBrush class + * @class fabric.PatternBrush + * @extends fabric.BaseBrush + */ +fabric.PatternBrush = fabric.util.createClass(fabric.PencilBrush, /** @lends fabric.PatternBrush.prototype */ { + + getPatternSrc: function() { + + var dotWidth = 20, + dotDistance = 5, + patternCanvas = fabric.document.createElement('canvas'), + patternCtx = patternCanvas.getContext('2d'); + + patternCanvas.width = patternCanvas.height = dotWidth + dotDistance; + + patternCtx.fillStyle = this.color; + patternCtx.beginPath(); + patternCtx.arc(dotWidth / 2, dotWidth / 2, dotWidth / 2, 0, Math.PI * 2, false); + patternCtx.closePath(); + patternCtx.fill(); + + return patternCanvas; + }, + + getPatternSrcFunction: function() { + return String(this.getPatternSrc).replace('this.color', '"' + this.color + '"'); + }, + + /** + * Creates "pattern" instance property + */ + getPattern: function() { + return this.canvas.contextTop.createPattern(this.source || this.getPatternSrc(), 'repeat'); + }, + + /** + * Sets brush styles + */ + _setBrushStyles: function() { + this.callSuper('_setBrushStyles'); + this.canvas.contextTop.strokeStyle = this.getPattern(); + }, + + /** + * Creates path + */ + createPath: function(pathData) { + var path = this.callSuper('createPath', pathData), + topLeft = path._getLeftTopCoords().scalarAdd(path.strokeWidth / 2); + + path.stroke = new fabric.Pattern({ + source: this.source || this.getPatternSrcFunction(), + offsetX: -topLeft.x, + offsetY: -topLeft.y + }); + return path; + } +}); + + +(function() { + + var getPointer = fabric.util.getPointer, + degreesToRadians = fabric.util.degreesToRadians, + radiansToDegrees = fabric.util.radiansToDegrees, + atan2 = Math.atan2, + abs = Math.abs, + supportLineDash = fabric.StaticCanvas.supports('setLineDash'), + + STROKE_OFFSET = 0.5; + + /** + * Canvas class + * @class fabric.Canvas + * @extends fabric.StaticCanvas + * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#canvas} + * @see {@link fabric.Canvas#initialize} for constructor definition + * + * @fires object:added + * @fires object:modified + * @fires object:rotating + * @fires object:scaling + * @fires object:moving + * @fires object:selected + * + * @fires before:selection:cleared + * @fires selection:cleared + * @fires selection:created + * + * @fires path:created + * @fires mouse:down + * @fires mouse:move + * @fires mouse:up + * @fires mouse:over + * @fires mouse:out + * + */ + fabric.Canvas = fabric.util.createClass(fabric.StaticCanvas, /** @lends fabric.Canvas.prototype */ { + + /** + * Constructor + * @param {HTMLElement | String} el <canvas> element to initialize instance on + * @param {Object} [options] Options object + * @return {Object} thisArg + */ + initialize: function(el, options) { + options || (options = { }); + + this._initStatic(el, options); + this._initInteractive(); + this._createCacheCanvas(); + }, + + /** + * When true, objects can be transformed by one side (unproportionally) + * @type Boolean + * @default + */ + uniScaleTransform: false, + + /** + * Indicates which key enable unproportional scaling + * values: 'altKey', 'shiftKey', 'ctrlKey'. + * If `null` or 'none' or any other string that is not a modifier key + * feature is disabled feature disabled. + * @since 1.6.2 + * @type String + * @default + */ + uniScaleKey: 'shiftKey', + + /** + * When true, objects use center point as the origin of scale transformation. + * Backwards incompatibility note: This property replaces "centerTransform" (Boolean). + * @since 1.3.4 + * @type Boolean + * @default + */ + centeredScaling: false, + + /** + * When true, objects use center point as the origin of rotate transformation. + * Backwards incompatibility note: This property replaces "centerTransform" (Boolean). + * @since 1.3.4 + * @type Boolean + * @default + */ + centeredRotation: false, + + /** + * Indicates which key enable centered Transfrom + * values: 'altKey', 'shiftKey', 'ctrlKey'. + * If `null` or 'none' or any other string that is not a modifier key + * feature is disabled feature disabled. + * @since 1.6.2 + * @type String + * @default + */ + centeredKey: 'altKey', + + /** + * Indicates which key enable alternate action on corner + * values: 'altKey', 'shiftKey', 'ctrlKey'. + * If `null` or 'none' or any other string that is not a modifier key + * feature is disabled feature disabled. + * @since 1.6.2 + * @type String + * @default + */ + altActionKey: 'shiftKey', + + /** + * Indicates that canvas is interactive. This property should not be changed. + * @type Boolean + * @default + */ + interactive: true, + + /** + * Indicates whether group selection should be enabled + * @type Boolean + * @default + */ + selection: true, + + /** + * Indicates which key enable multiple click selection + * values: 'altKey', 'shiftKey', 'ctrlKey'. + * If `null` or 'none' or any other string that is not a modifier key + * feature is disabled feature disabled. + * @since 1.6.2 + * @type String + * @default + */ + selectionKey: 'shiftKey', + + /** + * Indicates which key enable alternative selection + * in case of target overlapping with active object + * values: 'altKey', 'shiftKey', 'ctrlKey'. + * If `null` or 'none' or any other string that is not a modifier key + * feature is disabled feature disabled. + * @since 1.6.5 + * @type null|String + * @default + */ + altSelectionKey: null, + + /** + * Color of selection + * @type String + * @default + */ + selectionColor: 'rgba(100, 100, 255, 0.3)', // blue + + /** + * Default dash array pattern + * If not empty the selection border is dashed + * @type Array + */ + selectionDashArray: [], + + /** + * Color of the border of selection (usually slightly darker than color of selection itself) + * @type String + * @default + */ + selectionBorderColor: 'rgba(255, 255, 255, 0.3)', + + /** + * Width of a line used in object/group selection + * @type Number + * @default + */ + selectionLineWidth: 1, + + /** + * Default cursor value used when hovering over an object on canvas + * @type String + * @default + */ + hoverCursor: 'move', + + /** + * Default cursor value used when moving an object on canvas + * @type String + * @default + */ + moveCursor: 'move', + + /** + * Default cursor value used for the entire canvas + * @type String + * @default + */ + defaultCursor: 'default', + + /** + * Cursor value used during free drawing + * @type String + * @default + */ + freeDrawingCursor: 'crosshair', + + /** + * Cursor value used for rotation point + * @type String + * @default + */ + rotationCursor: 'crosshair', + + /** + * Default element class that's given to wrapper (div) element of canvas + * @type String + * @default + */ + containerClass: 'canvas-container', + + /** + * When true, object detection happens on per-pixel basis rather than on per-bounding-box + * @type Boolean + * @default + */ + perPixelTargetFind: false, + + /** + * Number of pixels around target pixel to tolerate (consider active) during object detection + * @type Number + * @default + */ + targetFindTolerance: 0, + + /** + * When true, target detection is skipped when hovering over canvas. This can be used to improve performance. + * @type Boolean + * @default + */ + skipTargetFind: false, + + /** + * When true, mouse events on canvas (mousedown/mousemove/mouseup) result in free drawing. + * After mousedown, mousemove creates a shape, + * and then mouseup finalizes it and adds an instance of `fabric.Path` onto canvas. + * @tutorial {@link http://fabricjs.com/fabric-intro-part-4#free_drawing} + * @type Boolean + * @default + */ + isDrawingMode: false, + + /** + * Indicates whether objects should remain in current stack position when selected. + * When false objects are brought to top and rendered as part of the selection group + * @type Boolean + * @default + */ + preserveObjectStacking: false, + + /** + * Indicates the angle that an object will lock to while rotating. + * @type Number + * @since 1.6.7 + * @default + */ + snapAngle: 0, + + /** + * Indicates the distance from the snapAngle the rotation will lock to the snapAngle. + * When `null`, the snapThreshold will default to the snapAngle. + * @type null|Number + * @since 1.6.7 + * @default + */ + snapThreshold: null, + + /** + * Indicates if the right click on canvas can output the context menu or not + * @type Boolean + * @since 1.6.5 + * @default + */ + stopContextMenu: false, + + /** + * Indicates if the canvas can fire right click events + * @type Boolean + * @since 1.6.5 + * @default + */ + fireRightClick: false, + + /** + * @private + */ + _initInteractive: function() { + this._currentTransform = null; + this._groupSelector = null; + this._initWrapperElement(); + this._createUpperCanvas(); + this._initEventListeners(); + + this._initRetinaScaling(); + + this.freeDrawingBrush = fabric.PencilBrush && new fabric.PencilBrush(this); + + this.calcOffset(); + }, + + /** + * Divides objects in two groups, one to render immediately + * and one to render as activeGroup. + * @return {Array} objects to render immediately and pushes the other in the activeGroup. + */ + _chooseObjectsToRender: function() { + var activeGroup = this.getActiveGroup(), + activeObject = this.getActiveObject(), + object, objsToRender = [], activeGroupObjects = []; + + if ((activeGroup || activeObject) && !this.preserveObjectStacking) { + for (var i = 0, length = this._objects.length; i < length; i++) { + object = this._objects[i]; + if ((!activeGroup || !activeGroup.contains(object)) && object !== activeObject) { + objsToRender.push(object); + } + else { + activeGroupObjects.push(object); + } + } + if (activeGroup) { + activeGroup._set('_objects', activeGroupObjects); + objsToRender.push(activeGroup); + } + activeObject && objsToRender.push(activeObject); + } + else { + objsToRender = this._objects; + } + return objsToRender; + }, + + /** + * Renders both the top canvas and the secondary container canvas. + * @return {fabric.Canvas} instance + * @chainable + */ + renderAll: function () { + if (this.contextTopDirty && !this._groupSelector && !this.isDrawingMode) { + this.clearContext(this.contextTop); + this.contextTopDirty = false; + } + var canvasToDrawOn = this.contextContainer; + this.renderCanvas(canvasToDrawOn, this._chooseObjectsToRender()); + return this; + }, + + /** + * Method to render only the top canvas. + * Also used to render the group selection box. + * @return {fabric.Canvas} thisArg + * @chainable + */ + renderTop: function () { + var ctx = this.contextTop; + this.clearContext(ctx); + + // we render the top context - last object + if (this.selection && this._groupSelector) { + this._drawSelection(ctx); + } + + this.fire('after:render'); + this.contextTopDirty = true; + return this; + }, + + /** + * Resets the current transform to its original values and chooses the type of resizing based on the event + * @private + */ + _resetCurrentTransform: function() { + var t = this._currentTransform; + + t.target.set({ + scaleX: t.original.scaleX, + scaleY: t.original.scaleY, + skewX: t.original.skewX, + skewY: t.original.skewY, + left: t.original.left, + top: t.original.top + }); + + if (this._shouldCenterTransform(t.target)) { + if (t.action === 'rotate') { + this._setOriginToCenter(t.target); + } + else { + if (t.originX !== 'center') { + if (t.originX === 'right') { + t.mouseXSign = -1; + } + else { + t.mouseXSign = 1; + } + } + if (t.originY !== 'center') { + if (t.originY === 'bottom') { + t.mouseYSign = -1; + } + else { + t.mouseYSign = 1; + } + } + + t.originX = 'center'; + t.originY = 'center'; + } + } + else { + t.originX = t.original.originX; + t.originY = t.original.originY; + } + }, + + /** + * Checks if point is contained within an area of given object + * @param {Event} e Event object + * @param {fabric.Object} target Object to test against + * @param {Object} [point] x,y object of point coordinates we want to check. + * @return {Boolean} true if point is contained within an area of given object + */ + containsPoint: function (e, target, point) { + var ignoreZoom = true, + pointer = point || this.getPointer(e, ignoreZoom), + xy; + + if (target.group && target.group === this.getActiveGroup()) { + xy = this._normalizePointer(target.group, pointer); + } + else { + xy = { x: pointer.x, y: pointer.y }; + } + // http://www.geog.ubc.ca/courses/klink/gis.notes/ncgia/u32.html + // http://idav.ucdavis.edu/~okreylos/TAship/Spring2000/PointInPolygon.html + return (target.containsPoint(xy) || target._findTargetCorner(pointer)); + }, + + /** + * @private + */ + _normalizePointer: function (object, pointer) { + var m = object.calcTransformMatrix(), + invertedM = fabric.util.invertTransform(m), + vpt = this.viewportTransform, + vptPointer = this.restorePointerVpt(pointer), + p = fabric.util.transformPoint(vptPointer, invertedM); + return fabric.util.transformPoint(p, vpt); + }, + + /** + * Returns true if object is transparent at a certain location + * @param {fabric.Object} target Object to check + * @param {Number} x Left coordinate + * @param {Number} y Top coordinate + * @return {Boolean} + */ + isTargetTransparent: function (target, x, y) { + var hasBorders = target.hasBorders, + transparentCorners = target.transparentCorners, + ctx = this.contextCache, + originalColor = target.selectionBackgroundColor; + + target.hasBorders = target.transparentCorners = false; + target.selectionBackgroundColor = ''; + + ctx.save(); + ctx.transform.apply(ctx, this.viewportTransform); + target.render(ctx); + ctx.restore(); + + target.active && target._renderControls(ctx); + + target.hasBorders = hasBorders; + target.transparentCorners = transparentCorners; + target.selectionBackgroundColor = originalColor; + + var isTransparent = fabric.util.isTransparent( + ctx, x, y, this.targetFindTolerance); + + this.clearContext(ctx); + + return isTransparent; + }, + + /** + * @private + * @param {Event} e Event object + * @param {fabric.Object} target + */ + _shouldClearSelection: function (e, target) { + var activeGroup = this.getActiveGroup(), + activeObject = this.getActiveObject(); + + return ( + !target + || + (target && + activeGroup && + !activeGroup.contains(target) && + activeGroup !== target && + !e[this.selectionKey]) + || + (target && !target.evented) + || + (target && + !target.selectable && + activeObject && + activeObject !== target) + ); + }, + + /** + * @private + * @param {fabric.Object} target + */ + _shouldCenterTransform: function (target) { + if (!target) { + return; + } + + var t = this._currentTransform, + centerTransform; + + if (t.action === 'scale' || t.action === 'scaleX' || t.action === 'scaleY') { + centerTransform = this.centeredScaling || target.centeredScaling; + } + else if (t.action === 'rotate') { + centerTransform = this.centeredRotation || target.centeredRotation; + } + + return centerTransform ? !t.altKey : t.altKey; + }, + + /** + * @private + */ + _getOriginFromCorner: function(target, corner) { + var origin = { + x: target.originX, + y: target.originY + }; + + if (corner === 'ml' || corner === 'tl' || corner === 'bl') { + origin.x = 'right'; + } + else if (corner === 'mr' || corner === 'tr' || corner === 'br') { + origin.x = 'left'; + } + + if (corner === 'tl' || corner === 'mt' || corner === 'tr') { + origin.y = 'bottom'; + } + else if (corner === 'bl' || corner === 'mb' || corner === 'br') { + origin.y = 'top'; + } + + return origin; + }, + + /** + * @private + */ + _getActionFromCorner: function(target, corner, e) { + if (!corner) { + return 'drag'; + } + + switch (corner) { + case 'mtr': + return 'rotate'; + case 'ml': + case 'mr': + return e[this.altActionKey] ? 'skewY' : 'scaleX'; + case 'mt': + case 'mb': + return e[this.altActionKey] ? 'skewX' : 'scaleY'; + default: + return 'scale'; + } + }, + + /** + * @private + * @param {Event} e Event object + * @param {fabric.Object} target + */ + _setupCurrentTransform: function (e, target) { + if (!target) { + return; + } + + var pointer = this.getPointer(e), + corner = target._findTargetCorner(this.getPointer(e, true)), + action = this._getActionFromCorner(target, corner, e), + origin = this._getOriginFromCorner(target, corner); + + this._currentTransform = { + target: target, + action: action, + corner: corner, + scaleX: target.scaleX, + scaleY: target.scaleY, + skewX: target.skewX, + skewY: target.skewY, + offsetX: pointer.x - target.left, + offsetY: pointer.y - target.top, + originX: origin.x, + originY: origin.y, + ex: pointer.x, + ey: pointer.y, + lastX: pointer.x, + lastY: pointer.y, + left: target.left, + top: target.top, + theta: degreesToRadians(target.angle), + width: target.width * target.scaleX, + mouseXSign: 1, + mouseYSign: 1, + shiftKey: e.shiftKey, + altKey: e[this.centeredKey] + }; + + this._currentTransform.original = { + left: target.left, + top: target.top, + scaleX: target.scaleX, + scaleY: target.scaleY, + skewX: target.skewX, + skewY: target.skewY, + originX: origin.x, + originY: origin.y + }; + + this._resetCurrentTransform(); + }, + + /** + * Translates object by "setting" its left/top + * @private + * @param {Number} x pointer's x coordinate + * @param {Number} y pointer's y coordinate + * @return {Boolean} true if the translation occurred + */ + _translateObject: function (x, y) { + var transform = this._currentTransform, + target = transform.target, + newLeft = x - transform.offsetX, + newTop = y - transform.offsetY, + moveX = !target.get('lockMovementX') && target.left !== newLeft, + moveY = !target.get('lockMovementY') && target.top !== newTop; + + moveX && target.set('left', newLeft); + moveY && target.set('top', newTop); + return moveX || moveY; + }, + + /** + * Check if we are increasing a positive skew or lower it, + * checking mouse direction and pressed corner. + * @private + */ + _changeSkewTransformOrigin: function(mouseMove, t, by) { + var property = 'originX', origins = { 0: 'center' }, + skew = t.target.skewX, originA = 'left', originB = 'right', + corner = t.corner === 'mt' || t.corner === 'ml' ? 1 : -1, + flipSign = 1; + + mouseMove = mouseMove > 0 ? 1 : -1; + if (by === 'y') { + skew = t.target.skewY; + originA = 'top'; + originB = 'bottom'; + property = 'originY'; + } + origins[-1] = originA; + origins[1] = originB; + + t.target.flipX && (flipSign *= -1); + t.target.flipY && (flipSign *= -1); + + if (skew === 0) { + t.skewSign = -corner * mouseMove * flipSign; + t[property] = origins[-mouseMove]; + } + else { + skew = skew > 0 ? 1 : -1; + t.skewSign = skew; + t[property] = origins[skew * corner * flipSign]; + } + }, + + /** + * Skew object by mouse events + * @private + * @param {Number} x pointer's x coordinate + * @param {Number} y pointer's y coordinate + * @param {String} by Either 'x' or 'y' + * @return {Boolean} true if the skewing occurred + */ + _skewObject: function (x, y, by) { + var t = this._currentTransform, + target = t.target, skewed = false, + lockSkewingX = target.get('lockSkewingX'), + lockSkewingY = target.get('lockSkewingY'); + + if ((lockSkewingX && by === 'x') || (lockSkewingY && by === 'y')) { + return false; + } + + // Get the constraint point + var center = target.getCenterPoint(), + actualMouseByCenter = target.toLocalPoint(new fabric.Point(x, y), 'center', 'center')[by], + lastMouseByCenter = target.toLocalPoint(new fabric.Point(t.lastX, t.lastY), 'center', 'center')[by], + actualMouseByOrigin, constraintPosition, dim = target._getTransformedDimensions(); + + this._changeSkewTransformOrigin(actualMouseByCenter - lastMouseByCenter, t, by); + actualMouseByOrigin = target.toLocalPoint(new fabric.Point(x, y), t.originX, t.originY)[by]; + constraintPosition = target.translateToOriginPoint(center, t.originX, t.originY); + // Actually skew the object + skewed = this._setObjectSkew(actualMouseByOrigin, t, by, dim); + t.lastX = x; + t.lastY = y; + // Make sure the constraints apply + target.setPositionByOrigin(constraintPosition, t.originX, t.originY); + return skewed; + }, + + /** + * Set object skew + * @private + * @return {Boolean} true if the skewing occurred + */ + _setObjectSkew: function(localMouse, transform, by, _dim) { + var target = transform.target, newValue, skewed = false, + skewSign = transform.skewSign, newDim, dimNoSkew, + otherBy, _otherBy, _by, newDimMouse, skewX, skewY; + + if (by === 'x') { + otherBy = 'y'; + _otherBy = 'Y'; + _by = 'X'; + skewX = 0; + skewY = target.skewY; + } + else { + otherBy = 'x'; + _otherBy = 'X'; + _by = 'Y'; + skewX = target.skewX; + skewY = 0; + } + + dimNoSkew = target._getTransformedDimensions(skewX, skewY); + newDimMouse = 2 * Math.abs(localMouse) - dimNoSkew[by]; + if (newDimMouse <= 2) { + newValue = 0; + } + else { + newValue = skewSign * Math.atan((newDimMouse / target['scale' + _by]) / + (dimNoSkew[otherBy] / target['scale' + _otherBy])); + newValue = fabric.util.radiansToDegrees(newValue); + } + skewed = target['skew' + _by] !== newValue; + target.set('skew' + _by, newValue); + if (target['skew' + _otherBy] !== 0) { + newDim = target._getTransformedDimensions(); + newValue = (_dim[otherBy] / newDim[otherBy]) * target['scale' + _otherBy]; + target.set('scale' + _otherBy, newValue); + } + return skewed; + }, + + /** + * Scales object by invoking its scaleX/scaleY methods + * @private + * @param {Number} x pointer's x coordinate + * @param {Number} y pointer's y coordinate + * @param {String} by Either 'x' or 'y' - specifies dimension constraint by which to scale an object. + * When not provided, an object is scaled by both dimensions equally + * @return {Boolean} true if the scaling occurred + */ + _scaleObject: function (x, y, by) { + var t = this._currentTransform, + target = t.target, + lockScalingX = target.get('lockScalingX'), + lockScalingY = target.get('lockScalingY'), + lockScalingFlip = target.get('lockScalingFlip'); + + if (lockScalingX && lockScalingY) { + return false; + } + + // Get the constraint point + var constraintPosition = target.translateToOriginPoint(target.getCenterPoint(), t.originX, t.originY), + localMouse = target.toLocalPoint(new fabric.Point(x, y), t.originX, t.originY), + dim = target._getTransformedDimensions(), scaled = false; + + this._setLocalMouse(localMouse, t); + + // Actually scale the object + scaled = this._setObjectScale(localMouse, t, lockScalingX, lockScalingY, by, lockScalingFlip, dim); + + // Make sure the constraints apply + target.setPositionByOrigin(constraintPosition, t.originX, t.originY); + return scaled; + }, + + /** + * @private + * @return {Boolean} true if the scaling occurred + */ + _setObjectScale: function(localMouse, transform, lockScalingX, lockScalingY, by, lockScalingFlip, _dim) { + var target = transform.target, forbidScalingX = false, forbidScalingY = false, scaled = false, + changeX, changeY, scaleX, scaleY; + + scaleX = localMouse.x * target.scaleX / _dim.x; + scaleY = localMouse.y * target.scaleY / _dim.y; + changeX = target.scaleX !== scaleX; + changeY = target.scaleY !== scaleY; + + if (lockScalingFlip && scaleX <= 0 && scaleX < target.scaleX) { + forbidScalingX = true; + } + + if (lockScalingFlip && scaleY <= 0 && scaleY < target.scaleY) { + forbidScalingY = true; + } + + if (by === 'equally' && !lockScalingX && !lockScalingY) { + forbidScalingX || forbidScalingY || (scaled = this._scaleObjectEqually(localMouse, target, transform, _dim)); + } + else if (!by) { + forbidScalingX || lockScalingX || (target.set('scaleX', scaleX) && (scaled = scaled || changeX)); + forbidScalingY || lockScalingY || (target.set('scaleY', scaleY) && (scaled = scaled || changeY)); + } + else if (by === 'x' && !target.get('lockUniScaling')) { + forbidScalingX || lockScalingX || (target.set('scaleX', scaleX) && (scaled = scaled || changeX)); + } + else if (by === 'y' && !target.get('lockUniScaling')) { + forbidScalingY || lockScalingY || (target.set('scaleY', scaleY) && (scaled = scaled || changeY)); + } + transform.newScaleX = scaleX; + transform.newScaleY = scaleY; + forbidScalingX || forbidScalingY || this._flipObject(transform, by); + return scaled; + }, + + /** + * @private + * @return {Boolean} true if the scaling occurred + */ + _scaleObjectEqually: function(localMouse, target, transform, _dim) { + + var dist = localMouse.y + localMouse.x, + lastDist = _dim.y * transform.original.scaleY / target.scaleY + + _dim.x * transform.original.scaleX / target.scaleX, + scaled; + + // We use transform.scaleX/Y instead of target.scaleX/Y + // because the object may have a min scale and we'll loose the proportions + transform.newScaleX = transform.original.scaleX * dist / lastDist; + transform.newScaleY = transform.original.scaleY * dist / lastDist; + scaled = transform.newScaleX !== target.scaleX || transform.newScaleY !== target.scaleY; + target.set('scaleX', transform.newScaleX); + target.set('scaleY', transform.newScaleY); + return scaled; + }, + + /** + * @private + */ + _flipObject: function(transform, by) { + if (transform.newScaleX < 0 && by !== 'y') { + if (transform.originX === 'left') { + transform.originX = 'right'; + } + else if (transform.originX === 'right') { + transform.originX = 'left'; + } + } + + if (transform.newScaleY < 0 && by !== 'x') { + if (transform.originY === 'top') { + transform.originY = 'bottom'; + } + else if (transform.originY === 'bottom') { + transform.originY = 'top'; + } + } + }, + + /** + * @private + */ + _setLocalMouse: function(localMouse, t) { + var target = t.target; + + if (t.originX === 'right') { + localMouse.x *= -1; + } + else if (t.originX === 'center') { + localMouse.x *= t.mouseXSign * 2; + if (localMouse.x < 0) { + t.mouseXSign = -t.mouseXSign; + } + } + + if (t.originY === 'bottom') { + localMouse.y *= -1; + } + else if (t.originY === 'center') { + localMouse.y *= t.mouseYSign * 2; + if (localMouse.y < 0) { + t.mouseYSign = -t.mouseYSign; + } + } + + // adjust the mouse coordinates when dealing with padding + if (abs(localMouse.x) > target.padding) { + if (localMouse.x < 0) { + localMouse.x += target.padding; + } + else { + localMouse.x -= target.padding; + } + } + else { // mouse is within the padding, set to 0 + localMouse.x = 0; + } + + if (abs(localMouse.y) > target.padding) { + if (localMouse.y < 0) { + localMouse.y += target.padding; + } + else { + localMouse.y -= target.padding; + } + } + else { + localMouse.y = 0; + } + }, + + /** + * Rotates object by invoking its rotate method + * @private + * @param {Number} x pointer's x coordinate + * @param {Number} y pointer's y coordinate + * @return {Boolean} true if the rotation occurred + */ + _rotateObject: function (x, y) { + + var t = this._currentTransform; + + if (t.target.get('lockRotation')) { + return false; + } + + var lastAngle = atan2(t.ey - t.top, t.ex - t.left), + curAngle = atan2(y - t.top, x - t.left), + angle = radiansToDegrees(curAngle - lastAngle + t.theta), + hasRoated = true; + + // normalize angle to positive value + if (angle < 0) { + angle = 360 + angle; + } + + angle %= 360 + + if (t.target.snapAngle > 0) { + var snapAngle = t.target.snapAngle, + snapThreshold = t.target.snapThreshold || snapAngle, + rightAngleLocked = Math.ceil(angle / snapAngle) * snapAngle, + leftAngleLocked = Math.floor(angle / snapAngle) * snapAngle; + + if (Math.abs(angle - leftAngleLocked) < snapThreshold) { + angle = leftAngleLocked; + } + else if (Math.abs(angle - rightAngleLocked) < snapThreshold) { + angle = rightAngleLocked; + } + + if (t.target.angle === angle) { + hasRoated = false + } + } + + t.target.angle = angle; + return hasRoated; + }, + + /** + * Set the cursor type of the canvas element + * @param {String} value Cursor type of the canvas element. + * @see http://www.w3.org/TR/css3-ui/#cursor + */ + setCursor: function (value) { + this.upperCanvasEl.style.cursor = value; + }, + + /** + * @param {fabric.Object} target to reset transform + * @private + */ + _resetObjectTransform: function (target) { + target.scaleX = 1; + target.scaleY = 1; + target.skewX = 0; + target.skewY = 0; + target.setAngle(0); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx to draw the selection on + */ + _drawSelection: function (ctx) { + var groupSelector = this._groupSelector, + left = groupSelector.left, + top = groupSelector.top, + aleft = abs(left), + atop = abs(top); + + if (this.selectionColor) { + ctx.fillStyle = this.selectionColor; + + ctx.fillRect( + groupSelector.ex - ((left > 0) ? 0 : -left), + groupSelector.ey - ((top > 0) ? 0 : -top), + aleft, + atop + ); + } + + if (!this.selectionLineWidth || !this.selectionBorderColor) { + return; + } + ctx.lineWidth = this.selectionLineWidth; + ctx.strokeStyle = this.selectionBorderColor; + + // selection border + if (this.selectionDashArray.length > 1 && !supportLineDash) { + + var px = groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0 : aleft), + py = groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0 : atop); + + ctx.beginPath(); + + fabric.util.drawDashedLine(ctx, px, py, px + aleft, py, this.selectionDashArray); + fabric.util.drawDashedLine(ctx, px, py + atop - 1, px + aleft, py + atop - 1, this.selectionDashArray); + fabric.util.drawDashedLine(ctx, px, py, px, py + atop, this.selectionDashArray); + fabric.util.drawDashedLine(ctx, px + aleft - 1, py, px + aleft - 1, py + atop, this.selectionDashArray); + + ctx.closePath(); + ctx.stroke(); + } + else { + fabric.Object.prototype._setLineDash.call(this, ctx, this.selectionDashArray); + ctx.strokeRect( + groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0 : aleft), + groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0 : atop), + aleft, + atop + ); + } + }, + + /** + * Method that determines what object we are clicking on + * @param {Event} e mouse event + * @param {Boolean} skipGroup when true, activeGroup is skipped and only objects are traversed through + */ + findTarget: function (e, skipGroup) { + if (this.skipTargetFind) { + return; + } + + var ignoreZoom = true, + pointer = this.getPointer(e, ignoreZoom), + activeGroup = this.getActiveGroup(), + activeObject = this.getActiveObject(), + activeTarget; + + // first check current group (if one exists) + // active group does not check sub targets like normal groups. + // if active group just exits. + if (activeGroup && !skipGroup && this._checkTarget(pointer, activeGroup)) { + this._fireOverOutEvents(activeGroup, e); + return activeGroup; + } + // if we hit the corner of an activeObject, let's return that. + if (activeObject && activeObject._findTargetCorner(pointer)) { + this._fireOverOutEvents(activeObject, e); + return activeObject; + } + if (activeObject && this._checkTarget(pointer, activeObject)) { + if (!this.preserveObjectStacking) { + this._fireOverOutEvents(activeObject, e); + return activeObject; + } + else { + activeTarget = activeObject; + } + } + + this.targets = []; + + var target = this._searchPossibleTargets(this._objects, pointer); + if (e[this.altSelectionKey] && target && activeTarget && target !== activeTarget) { + target = activeTarget; + } + this._fireOverOutEvents(target, e); + return target; + }, + + /** + * @private + */ + _fireOverOutEvents: function(target, e) { + if (target) { + if (this._hoveredTarget !== target) { + if (this._hoveredTarget) { + this.fire('mouse:out', { target: this._hoveredTarget, e: e }); + this._hoveredTarget.fire('mouseout'); + } + this.fire('mouse:over', { target: target, e: e }); + target.fire('mouseover'); + this._hoveredTarget = target; + } + } + else if (this._hoveredTarget) { + this.fire('mouse:out', { target: this._hoveredTarget, e: e }); + this._hoveredTarget.fire('mouseout'); + this._hoveredTarget = null; + } + }, + + /** + * @private + */ + _checkTarget: function(pointer, obj) { + if (obj && + obj.visible && + obj.evented && + this.containsPoint(null, obj, pointer)){ + if ((this.perPixelTargetFind || obj.perPixelTargetFind) && !obj.isEditing) { + var isTransparent = this.isTargetTransparent(obj, pointer.x, pointer.y); + if (!isTransparent) { + return true; + } + } + else { + return true; + } + } + }, + + /** + * @private + */ + _searchPossibleTargets: function(objects, pointer) { + + // Cache all targets where their bounding box contains point. + var target, i = objects.length, normalizedPointer, subTarget; + // Do not check for currently grouped objects, since we check the parent group itself. + // untill we call this function specifically to search inside the activeGroup + while (i--) { + if (this._checkTarget(pointer, objects[i])) { + target = objects[i]; + if (target.type === 'group' && target.subTargetCheck) { + normalizedPointer = this._normalizePointer(target, pointer); + subTarget = this._searchPossibleTargets(target._objects, normalizedPointer); + subTarget && this.targets.push(subTarget); + } + break; + } + } + return target; + }, + + /** + * Returns pointer coordinates without the effect of the viewport + * @param {Object} pointer with "x" and "y" number values + * @return {Object} object with "x" and "y" number values + */ + restorePointerVpt: function(pointer) { + return fabric.util.transformPoint( + pointer, + fabric.util.invertTransform(this.viewportTransform) + ); + }, + + /** + * Returns pointer coordinates relative to canvas. + * @param {Event} e + * @param {Boolean} ignoreZoom + * @return {Object} object with "x" and "y" number values + */ + getPointer: function (e, ignoreZoom, upperCanvasEl) { + if (!upperCanvasEl) { + upperCanvasEl = this.upperCanvasEl; + } + var pointer = getPointer(e), + bounds = upperCanvasEl.getBoundingClientRect(), + boundsWidth = bounds.width || 0, + boundsHeight = bounds.height || 0, + cssScale; + + if (!boundsWidth || !boundsHeight ) { + if ('top' in bounds && 'bottom' in bounds) { + boundsHeight = Math.abs( bounds.top - bounds.bottom ); + } + if ('right' in bounds && 'left' in bounds) { + boundsWidth = Math.abs( bounds.right - bounds.left ); + } + } + + this.calcOffset(); + + pointer.x = pointer.x - this._offset.left; + pointer.y = pointer.y - this._offset.top; + if (!ignoreZoom) { + pointer = this.restorePointerVpt(pointer); + } + + if (boundsWidth === 0 || boundsHeight === 0) { + // If bounds are not available (i.e. not visible), do not apply scale. + cssScale = { width: 1, height: 1 }; + } + else { + cssScale = { + width: upperCanvasEl.width / boundsWidth, + height: upperCanvasEl.height / boundsHeight + }; + } + + return { + x: pointer.x * cssScale.width, + y: pointer.y * cssScale.height + }; + }, + + /** + * @private + * @throws {CANVAS_INIT_ERROR} If canvas can not be initialized + */ + _createUpperCanvas: function () { + var lowerCanvasClass = this.lowerCanvasEl.className.replace(/\s*lower-canvas\s*/, ''); + + this.upperCanvasEl = this._createCanvasElement(); + fabric.util.addClass(this.upperCanvasEl, 'upper-canvas ' + lowerCanvasClass); + + this.wrapperEl.appendChild(this.upperCanvasEl); + + this._copyCanvasStyle(this.lowerCanvasEl, this.upperCanvasEl); + this._applyCanvasStyle(this.upperCanvasEl); + this.contextTop = this.upperCanvasEl.getContext('2d'); + }, + + /** + * @private + */ + _createCacheCanvas: function () { + this.cacheCanvasEl = this._createCanvasElement(); + this.cacheCanvasEl.setAttribute('width', this.width); + this.cacheCanvasEl.setAttribute('height', this.height); + this.contextCache = this.cacheCanvasEl.getContext('2d'); + }, + + /** + * @private + */ + _initWrapperElement: function () { + this.wrapperEl = fabric.util.wrapElement(this.lowerCanvasEl, 'div', { + 'class': this.containerClass + }); + fabric.util.setStyle(this.wrapperEl, { + width: this.getWidth() + 'px', + height: this.getHeight() + 'px', + position: 'relative' + }); + fabric.util.makeElementUnselectable(this.wrapperEl); + }, + + /** + * @private + * @param {HTMLElement} element canvas element to apply styles on + */ + _applyCanvasStyle: function (element) { + var width = this.getWidth() || element.width, + height = this.getHeight() || element.height; + + fabric.util.setStyle(element, { + position: 'absolute', + width: width + 'px', + height: height + 'px', + left: 0, + top: 0 + }); + element.width = width; + element.height = height; + fabric.util.makeElementUnselectable(element); + }, + + /** + * Copys the the entire inline style from one element (fromEl) to another (toEl) + * @private + * @param {Element} fromEl Element style is copied from + * @param {Element} toEl Element copied style is applied to + */ + _copyCanvasStyle: function (fromEl, toEl) { + toEl.style.cssText = fromEl.style.cssText; + }, + + /** + * Returns context of canvas where object selection is drawn + * @return {CanvasRenderingContext2D} + */ + getSelectionContext: function() { + return this.contextTop; + }, + + /** + * Returns <canvas> element on which object selection is drawn + * @return {HTMLCanvasElement} + */ + getSelectionElement: function () { + return this.upperCanvasEl; + }, + + /** + * @private + * @param {Object} object + */ + _setActiveObject: function(object) { + if (this._activeObject) { + this._activeObject.set('active', false); + } + this._activeObject = object; + object.set('active', true); + }, + + /** + * Sets given object as the only active object on canvas + * @param {fabric.Object} object Object to set as an active one + * @param {Event} [e] Event (passed along when firing "object:selected") + * @return {fabric.Canvas} thisArg + * @chainable + */ + setActiveObject: function (object, e) { + this._setActiveObject(object); + this.renderAll(); + this.fire('object:selected', { target: object, e: e }); + object.fire('selected', { e: e }); + return this; + }, + + /** + * Returns currently active object + * @return {fabric.Object} active object + */ + getActiveObject: function () { + return this._activeObject; + }, + + /** + * @private + * @param {fabric.Object} obj Object that was removed + */ + _onObjectRemoved: function(obj) { + // removing active object should fire "selection:cleared" events + if (this.getActiveObject() === obj) { + this.fire('before:selection:cleared', { target: obj }); + this._discardActiveObject(); + this.fire('selection:cleared', { target: obj }); + obj.fire('deselected'); + } + this.callSuper('_onObjectRemoved', obj); + }, + + /** + * @private + */ + _discardActiveObject: function() { + if (this._activeObject) { + this._activeObject.set('active', false); + } + this._activeObject = null; + }, + + /** + * Discards currently active object and fire events + * @param {event} e + * @return {fabric.Canvas} thisArg + * @chainable + */ + discardActiveObject: function (e) { + var activeObject = this._activeObject; + this.fire('before:selection:cleared', { target: activeObject, e: e }); + this._discardActiveObject(); + this.fire('selection:cleared', { e: e }); + activeObject && activeObject.fire('deselected', { e: e }); + return this; + }, + + /** + * @private + * @param {fabric.Group} group + */ + _setActiveGroup: function(group) { + this._activeGroup = group; + if (group) { + group.set('active', true); + } + }, + + /** + * Sets active group to a specified one + * @param {fabric.Group} group Group to set as a current one + * @param {Event} e Event object + * @return {fabric.Canvas} thisArg + * @chainable + */ + setActiveGroup: function (group, e) { + this._setActiveGroup(group); + if (group) { + this.fire('object:selected', { target: group, e: e }); + group.fire('selected', { e: e }); + } + return this; + }, + + /** + * Returns currently active group + * @return {fabric.Group} Current group + */ + getActiveGroup: function () { + return this._activeGroup; + }, + + /** + * @private + */ + _discardActiveGroup: function() { + var g = this.getActiveGroup(); + if (g) { + g.destroy(); + } + this.setActiveGroup(null); + }, + + /** + * Discards currently active group and fire events + * @return {fabric.Canvas} thisArg + * @chainable + */ + discardActiveGroup: function (e) { + var g = this.getActiveGroup(); + this.fire('before:selection:cleared', { e: e, target: g }); + this._discardActiveGroup(); + this.fire('selection:cleared', { e: e }); + return this; + }, + + /** + * Deactivates all objects on canvas, removing any active group or object + * @return {fabric.Canvas} thisArg + * @chainable + */ + deactivateAll: function () { + var allObjects = this.getObjects(), + i = 0, + len = allObjects.length; + for ( ; i < len; i++) { + allObjects[i].set('active', false); + } + this._discardActiveGroup(); + this._discardActiveObject(); + return this; + }, + + /** + * Deactivates all objects and dispatches appropriate events + * @return {fabric.Canvas} thisArg + * @chainable + */ + deactivateAllWithDispatch: function (e) { + var activeGroup = this.getActiveGroup(), + activeObject = this.getActiveObject(); + if (activeObject || activeGroup) { + this.fire('before:selection:cleared', { target: activeObject || activeGroup, e: e }); + } + this.deactivateAll(); + if (activeObject || activeGroup) { + this.fire('selection:cleared', { e: e, target: activeObject }); + activeObject && activeObject.fire('deselected'); + } + return this; + }, + + /** + * Clears a canvas element and removes all event listeners + * @return {fabric.Canvas} thisArg + * @chainable + */ + dispose: function () { + this.callSuper('dispose'); + var wrapper = this.wrapperEl; + this.removeListeners(); + wrapper.removeChild(this.upperCanvasEl); + wrapper.removeChild(this.lowerCanvasEl); + delete this.upperCanvasEl; + if (wrapper.parentNode) { + wrapper.parentNode.replaceChild(this.lowerCanvasEl, this.wrapperEl); + } + delete this.wrapperEl; + return this; + }, + + /** + * Clears all contexts (background, main, top) of an instance + * @return {fabric.Canvas} thisArg + * @chainable + */ + clear: function () { + this.discardActiveGroup(); + this.discardActiveObject(); + this.clearContext(this.contextTop); + return this.callSuper('clear'); + }, + + /** + * Draws objects' controls (borders/controls) + * @param {CanvasRenderingContext2D} ctx Context to render controls on + */ + drawControls: function(ctx) { + var activeGroup = this.getActiveGroup(); + + if (activeGroup) { + activeGroup._renderControls(ctx); + } + else { + this._drawObjectsControls(ctx); + } + }, + + /** + * @private + */ + _drawObjectsControls: function(ctx) { + for (var i = 0, len = this._objects.length; i < len; ++i) { + if (!this._objects[i] || !this._objects[i].active) { + continue; + } + this._objects[i]._renderControls(ctx); + } + }, + + /** + * @private + */ + _toObject: function(instance, methodName, propertiesToInclude) { + //If the object is part of the current selection group, it should + //be transformed appropriately + //i.e. it should be serialised as it would appear if the selection group + //were to be destroyed. + var originalProperties = this._realizeGroupTransformOnObject(instance), + object = this.callSuper('_toObject', instance, methodName, propertiesToInclude); + //Undo the damage we did by changing all of its properties + this._unwindGroupTransformOnObject(instance, originalProperties); + return object; + }, + + /** + * Realises an object's group transformation on it + * @private + * @param {fabric.Object} [instance] the object to transform (gets mutated) + * @returns the original values of instance which were changed + */ + _realizeGroupTransformOnObject: function(instance) { + var layoutProps = ['angle', 'flipX', 'flipY', 'height', 'left', 'scaleX', 'scaleY', 'top', 'width']; + if (instance.group && instance.group === this.getActiveGroup()) { + //Copy all the positionally relevant properties across now + var originalValues = {}; + layoutProps.forEach(function(prop) { + originalValues[prop] = instance[prop]; + }); + this.getActiveGroup().realizeTransform(instance); + return originalValues; + } + else { + return null; + } + }, + + /** + * Restores the changed properties of instance + * @private + * @param {fabric.Object} [instance] the object to un-transform (gets mutated) + * @param {Object} [originalValues] the original values of instance, as returned by _realizeGroupTransformOnObject + */ + _unwindGroupTransformOnObject: function(instance, originalValues) { + if (originalValues) { + instance.set(originalValues); + } + }, + + /** + * @private + */ + _setSVGObject: function(markup, instance, reviver) { + var originalProperties; + //If the object is in a selection group, simulate what would happen to that + //object when the group is deselected + originalProperties = this._realizeGroupTransformOnObject(instance); + this.callSuper('_setSVGObject', markup, instance, reviver); + this._unwindGroupTransformOnObject(instance, originalProperties); + }, + }); + + // copying static properties manually to work around Opera's bug, + // where "prototype" property is enumerable and overrides existing prototype + for (var prop in fabric.StaticCanvas) { + if (prop !== 'prototype') { + fabric.Canvas[prop] = fabric.StaticCanvas[prop]; + } + } + + if (fabric.isTouchSupported) { + /** @ignore */ + fabric.Canvas.prototype._setCursorFromEvent = function() { }; + } + + /** + * @ignore + * @class fabric.Element + * @alias fabric.Canvas + * @deprecated Use {@link fabric.Canvas} instead. + * @constructor + */ + fabric.Element = fabric.Canvas; +})(); + + +(function() { + + var cursorOffset = { + mt: 0, // n + tr: 1, // ne + mr: 2, // e + br: 3, // se + mb: 4, // s + bl: 5, // sw + ml: 6, // w + tl: 7 // nw + }, + addListener = fabric.util.addListener, + removeListener = fabric.util.removeListener; + + fabric.util.object.extend(fabric.Canvas.prototype, /** @lends fabric.Canvas.prototype */ { + + /** + * Map of cursor style values for each of the object controls + * @private + */ + cursorMap: [ + 'n-resize', + 'ne-resize', + 'e-resize', + 'se-resize', + 's-resize', + 'sw-resize', + 'w-resize', + 'nw-resize' + ], + + /** + * Adds mouse listeners to canvas + * @private + */ + _initEventListeners: function () { + + this._bindEvents(); + + addListener(fabric.window, 'resize', this._onResize); + + // mouse events + addListener(this.upperCanvasEl, 'mousedown', this._onMouseDown); + addListener(this.upperCanvasEl, 'mousemove', this._onMouseMove); + addListener(this.upperCanvasEl, 'mouseout', this._onMouseOut); + addListener(this.upperCanvasEl, 'mouseenter', this._onMouseEnter); + addListener(this.upperCanvasEl, 'wheel', this._onMouseWheel); + addListener(this.upperCanvasEl, 'contextmenu', this._onContextMenu); + + // touch events + addListener(this.upperCanvasEl, 'touchstart', this._onMouseDown); + addListener(this.upperCanvasEl, 'touchmove', this._onMouseMove); + + if (typeof eventjs !== 'undefined' && 'add' in eventjs) { + eventjs.add(this.upperCanvasEl, 'gesture', this._onGesture); + eventjs.add(this.upperCanvasEl, 'drag', this._onDrag); + eventjs.add(this.upperCanvasEl, 'orientation', this._onOrientationChange); + eventjs.add(this.upperCanvasEl, 'shake', this._onShake); + eventjs.add(this.upperCanvasEl, 'longpress', this._onLongPress); + } + }, + + /** + * @private + */ + _bindEvents: function() { + this._onMouseDown = this._onMouseDown.bind(this); + this._onMouseMove = this._onMouseMove.bind(this); + this._onMouseUp = this._onMouseUp.bind(this); + this._onResize = this._onResize.bind(this); + this._onGesture = this._onGesture.bind(this); + this._onDrag = this._onDrag.bind(this); + this._onShake = this._onShake.bind(this); + this._onLongPress = this._onLongPress.bind(this); + this._onOrientationChange = this._onOrientationChange.bind(this); + this._onMouseWheel = this._onMouseWheel.bind(this); + this._onMouseOut = this._onMouseOut.bind(this); + this._onMouseEnter = this._onMouseEnter.bind(this); + this._onContextMenu = this._onContextMenu.bind(this); + }, + + /** + * Removes all event listeners + */ + removeListeners: function() { + removeListener(fabric.window, 'resize', this._onResize); + + removeListener(this.upperCanvasEl, 'mousedown', this._onMouseDown); + removeListener(this.upperCanvasEl, 'mousemove', this._onMouseMove); + removeListener(this.upperCanvasEl, 'mouseout', this._onMouseOut); + removeListener(this.upperCanvasEl, 'mouseenter', this._onMouseEnter); + removeListener(this.upperCanvasEl, 'wheel', this._onMouseWheel); + removeListener(this.upperCanvasEl, 'contextmenu', this._onContextMenu); + + removeListener(this.upperCanvasEl, 'touchstart', this._onMouseDown); + removeListener(this.upperCanvasEl, 'touchmove', this._onMouseMove); + + if (typeof eventjs !== 'undefined' && 'remove' in eventjs) { + eventjs.remove(this.upperCanvasEl, 'gesture', this._onGesture); + eventjs.remove(this.upperCanvasEl, 'drag', this._onDrag); + eventjs.remove(this.upperCanvasEl, 'orientation', this._onOrientationChange); + eventjs.remove(this.upperCanvasEl, 'shake', this._onShake); + eventjs.remove(this.upperCanvasEl, 'longpress', this._onLongPress); + } + }, + + /** + * @private + * @param {Event} [e] Event object fired on Event.js gesture + * @param {Event} [self] Inner Event object + */ + _onGesture: function(e, self) { + this.__onTransformGesture && this.__onTransformGesture(e, self); + }, + + /** + * @private + * @param {Event} [e] Event object fired on Event.js drag + * @param {Event} [self] Inner Event object + */ + _onDrag: function(e, self) { + this.__onDrag && this.__onDrag(e, self); + }, + + /** + * @private + * @param {Event} [e] Event object fired on wheel event + */ + _onMouseWheel: function(e) { + this.__onMouseWheel(e); + }, + + /** + * @private + * @param {Event} e Event object fired on mousedown + */ + _onMouseOut: function(e) { + var target = this._hoveredTarget; + this.fire('mouse:out', { target: target, e: e }); + this._hoveredTarget = null; + target && target.fire('mouseout', { e: e }); + }, + + /** + * @private + * @param {Event} e Event object fired on mouseenter + */ + _onMouseEnter: function(e) { + if (!this.findTarget(e)) { + this.fire('mouse:over', { target: null, e: e }); + this._hoveredTarget = null; + } + }, + + /** + * @private + * @param {Event} [e] Event object fired on Event.js orientation change + * @param {Event} [self] Inner Event object + */ + _onOrientationChange: function(e, self) { + this.__onOrientationChange && this.__onOrientationChange(e, self); + }, + + /** + * @private + * @param {Event} [e] Event object fired on Event.js shake + * @param {Event} [self] Inner Event object + */ + _onShake: function(e, self) { + this.__onShake && this.__onShake(e, self); + }, + + /** + * @private + * @param {Event} [e] Event object fired on Event.js shake + * @param {Event} [self] Inner Event object + */ + _onLongPress: function(e, self) { + this.__onLongPress && this.__onLongPress(e, self); + }, + + /** + * @private + * @param {Event} e Event object fired on mousedown + */ + _onContextMenu: function (e) { + if (this.stopContextMenu) { + e.stopPropagation() + e.preventDefault(); + } + return false; + }, + + /** + * @private + * @param {Event} e Event object fired on mousedown + */ + _onMouseDown: function (e) { + this.__onMouseDown(e); + + addListener(fabric.document, 'touchend', this._onMouseUp); + addListener(fabric.document, 'touchmove', this._onMouseMove); + + removeListener(this.upperCanvasEl, 'mousemove', this._onMouseMove); + removeListener(this.upperCanvasEl, 'touchmove', this._onMouseMove); + + if (e.type === 'touchstart') { + // Unbind mousedown to prevent double triggers from touch devices + removeListener(this.upperCanvasEl, 'mousedown', this._onMouseDown); + } + else { + addListener(fabric.document, 'mouseup', this._onMouseUp); + addListener(fabric.document, 'mousemove', this._onMouseMove); + } + }, + + /** + * @private + * @param {Event} e Event object fired on mouseup + */ + _onMouseUp: function (e) { + this.__onMouseUp(e); + + removeListener(fabric.document, 'mouseup', this._onMouseUp); + removeListener(fabric.document, 'touchend', this._onMouseUp); + + removeListener(fabric.document, 'mousemove', this._onMouseMove); + removeListener(fabric.document, 'touchmove', this._onMouseMove); + + addListener(this.upperCanvasEl, 'mousemove', this._onMouseMove); + addListener(this.upperCanvasEl, 'touchmove', this._onMouseMove); + + if (e.type === 'touchend') { + // Wait 400ms before rebinding mousedown to prevent double triggers + // from touch devices + var _this = this; + setTimeout(function() { + addListener(_this.upperCanvasEl, 'mousedown', _this._onMouseDown); + }, 400); + } + }, + + /** + * @private + * @param {Event} e Event object fired on mousemove + */ + _onMouseMove: function (e) { + !this.allowTouchScrolling && e.preventDefault && e.preventDefault(); + this.__onMouseMove(e); + }, + + /** + * @private + */ + _onResize: function () { + this.calcOffset(); + }, + + /** + * Decides whether the canvas should be redrawn in mouseup and mousedown events. + * @private + * @param {Object} target + * @param {Object} pointer + */ + _shouldRender: function(target, pointer) { + var activeObject = this.getActiveGroup() || this.getActiveObject(); + + return !!( + (target && ( + target.isMoving || + target !== activeObject)) + || + (!target && !!activeObject) + || + (!target && !activeObject && !this._groupSelector) + || + (pointer && + this._previousPointer && + this.selection && ( + pointer.x !== this._previousPointer.x || + pointer.y !== this._previousPointer.y)) + ); + }, + + /** + * Method that defines the actions when mouse is released on canvas. + * The method resets the currentTransform parameters, store the image corner + * position in the image object and render the canvas on top. + * @private + * @param {Event} e Event object fired on mouseup + */ + __onMouseUp: function (e) { + var target, searchTarget = true, transform = this._currentTransform, + groupSelector = this._groupSelector, + isClick = (!groupSelector || (groupSelector.left === 0 && groupSelector.top === 0)); + + if (this.isDrawingMode && this._isCurrentlyDrawing) { + this._onMouseUpInDrawingMode(e); + return; + } + + if (transform) { + this._finalizeCurrentTransform(); + searchTarget = !transform.actionPerformed; + } + + target = searchTarget ? this.findTarget(e, true) : transform.target; + + var shouldRender = this._shouldRender(target, this.getPointer(e)); + + if (target || !isClick) { + this._maybeGroupObjects(e); + } + else { + // those are done by default on mouse up + // by _maybeGroupObjects, we are skipping it in case of no target find + this._groupSelector = null; + this._currentTransform = null; + } + + if (target) { + target.isMoving = false; + } + + this._handleCursorAndEvent(e, target, 'up'); + target && (target.__corner = 0); + shouldRender && this.renderAll(); + }, + + /** + * set cursor for mouse up and handle mouseUp event + * @param {Event} e event from mouse + * @param {fabric.Object} target receiving event + * @param {String} eventType event to fire (up, down or move) + */ + _handleCursorAndEvent: function(e, target, eventType) { + this._setCursorFromEvent(e, target); + this._handleEvent(e, eventType, target ? target : null); + }, + + /** + * Handle event firing for target and subtargets + * @param {Event} e event from mouse + * @param {String} eventType event to fire (up, down or move) + * @param {fabric.Object} targetObj receiving event + */ + _handleEvent: function(e, eventType, targetObj) { + var target = typeof targetObj === undefined ? this.findTarget(e) : targetObj, + targets = this.targets || [], + options = { e: e, target: target, subTargets: targets }; + + this.fire('mouse:' + eventType, options); + target && target.fire('mouse' + eventType, options); + for (var i = 0; i < targets.length; i++) { + targets[i].fire('mouse' + eventType, options); + } + }, + + /** + * @private + */ + _finalizeCurrentTransform: function() { + + var transform = this._currentTransform, + target = transform.target; + + if (target._scaling) { + target._scaling = false; + } + + target.setCoords(); + this._restoreOriginXY(target); + + if (transform.actionPerformed || (this.stateful && target.hasStateChanged())) { + this.fire('object:modified', { target: target }); + target.fire('modified'); + } + }, + + /** + * @private + * @param {Object} target Object to restore + */ + _restoreOriginXY: function(target) { + if (this._previousOriginX && this._previousOriginY) { + + var originPoint = target.translateToOriginPoint( + target.getCenterPoint(), + this._previousOriginX, + this._previousOriginY); + + target.originX = this._previousOriginX; + target.originY = this._previousOriginY; + + target.left = originPoint.x; + target.top = originPoint.y; + + this._previousOriginX = null; + this._previousOriginY = null; + } + }, + + /** + * @private + * @param {Event} e Event object fired on mousedown + */ + _onMouseDownInDrawingMode: function(e) { + this._isCurrentlyDrawing = true; + this.discardActiveObject(e).renderAll(); + if (this.clipTo) { + fabric.util.clipContext(this, this.contextTop); + } + var pointer = this.getPointer(e); + this.freeDrawingBrush.onMouseDown(pointer); + this._handleEvent(e, 'down'); + }, + + /** + * @private + * @param {Event} e Event object fired on mousemove + */ + _onMouseMoveInDrawingMode: function(e) { + if (this._isCurrentlyDrawing) { + var pointer = this.getPointer(e); + this.freeDrawingBrush.onMouseMove(pointer); + } + this.setCursor(this.freeDrawingCursor); + this._handleEvent(e, 'move'); + }, + + /** + * @private + * @param {Event} e Event object fired on mouseup + */ + _onMouseUpInDrawingMode: function(e) { + this._isCurrentlyDrawing = false; + if (this.clipTo) { + this.contextTop.restore(); + } + this.freeDrawingBrush.onMouseUp(); + this._handleEvent(e, 'up'); + }, + + /** + * Method that defines the actions when mouse is clic ked on canvas. + * The method inits the currentTransform parameters and renders all the + * canvas so the current image can be placed on the top canvas and the rest + * in on the container one. + * @private + * @param {Event} e Event object fired on mousedown + */ + __onMouseDown: function (e) { + + var target = this.findTarget(e), + pointer = this.getPointer(e, true); + + // if right click just fire events + var isRightClick = 'which' in e ? e.which === 3 : e.button === 2; + if (isRightClick) { + if (this.fireRightClick) { + this._handleEvent(e, 'down', target ? target : null); + } + return; + } + + if (this.isDrawingMode) { + this._onMouseDownInDrawingMode(e); + return; + } + + // ignore if some object is being transformed at this moment + if (this._currentTransform) { + return; + } + + // save pointer for check in __onMouseUp event + this._previousPointer = pointer; + + var shouldRender = this._shouldRender(target, pointer), + shouldGroup = this._shouldGroup(e, target); + + if (this._shouldClearSelection(e, target)) { + this._clearSelection(e, target, pointer); + } + else if (shouldGroup) { + this._handleGrouping(e, target); + target = this.getActiveGroup(); + } + + if (target) { + if (target.selectable && (target.__corner || !shouldGroup)) { + this._beforeTransform(e, target); + this._setupCurrentTransform(e, target); + } + + if (target !== this.getActiveGroup() && target !== this.getActiveObject()) { + this.deactivateAll(); + target.selectable && this.setActiveObject(target, e); + } + } + this._handleEvent(e, 'down', target ? target : null); + // we must renderAll so that we update the visuals + shouldRender && this.renderAll(); + }, + + /** + * @private + */ + _beforeTransform: function(e, target) { + this.stateful && target.saveState(); + + // determine if it's a drag or rotate case + if (target._findTargetCorner(this.getPointer(e))) { + this.onBeforeScaleRotate(target); + } + + }, + + /** + * @private + */ + _clearSelection: function(e, target, pointer) { + this.deactivateAllWithDispatch(e); + + if (target && target.selectable) { + this.setActiveObject(target, e); + } + else if (this.selection) { + this._groupSelector = { + ex: pointer.x, + ey: pointer.y, + top: 0, + left: 0 + }; + } + }, + + /** + * @private + * @param {Object} target Object for that origin is set to center + */ + _setOriginToCenter: function(target) { + this._previousOriginX = this._currentTransform.target.originX; + this._previousOriginY = this._currentTransform.target.originY; + + var center = target.getCenterPoint(); + + target.originX = 'center'; + target.originY = 'center'; + + target.left = center.x; + target.top = center.y; + + this._currentTransform.left = target.left; + this._currentTransform.top = target.top; + }, + + /** + * @private + * @param {Object} target Object for that center is set to origin + */ + _setCenterToOrigin: function(target) { + var originPoint = target.translateToOriginPoint( + target.getCenterPoint(), + this._previousOriginX, + this._previousOriginY); + + target.originX = this._previousOriginX; + target.originY = this._previousOriginY; + + target.left = originPoint.x; + target.top = originPoint.y; + + this._previousOriginX = null; + this._previousOriginY = null; + }, + + /** + * Method that defines the actions when mouse is hovering the canvas. + * The currentTransform parameter will definde whether the user is rotating/scaling/translating + * an image or neither of them (only hovering). A group selection is also possible and would cancel + * all any other type of action. + * In case of an image transformation only the top canvas will be rendered. + * @private + * @param {Event} e Event object fired on mousemove + */ + __onMouseMove: function (e) { + + var target, pointer; + + if (this.isDrawingMode) { + this._onMouseMoveInDrawingMode(e); + return; + } + if (typeof e.touches !== 'undefined' && e.touches.length > 1) { + return; + } + + var groupSelector = this._groupSelector; + + // We initially clicked in an empty area, so we draw a box for multiple selection + if (groupSelector) { + pointer = this.getPointer(e, true); + + groupSelector.left = pointer.x - groupSelector.ex; + groupSelector.top = pointer.y - groupSelector.ey; + + this.renderTop(); + } + else if (!this._currentTransform) { + target = this.findTarget(e); + this._setCursorFromEvent(e, target); + } + else { + this._transformObject(e); + } + this._handleEvent(e, 'move', target ? target : null); + }, + + /** + * Method that defines actions when an Event Mouse Wheel + * @param {Event} e Event object fired on mouseup + */ + __onMouseWheel: function(e) { + this.fire('mouse:wheel', { + e: e + }); + }, + + /** + * @private + * @param {Event} e Event fired on mousemove + */ + _transformObject: function(e) { + var pointer = this.getPointer(e), + transform = this._currentTransform; + + transform.reset = false; + transform.target.isMoving = true; + + this._beforeScaleTransform(e, transform); + this._performTransformAction(e, transform, pointer); + + transform.actionPerformed && this.renderAll(); + }, + + /** + * @private + */ + _performTransformAction: function(e, transform, pointer) { + var x = pointer.x, + y = pointer.y, + target = transform.target, + action = transform.action, + actionPerformed = false; + + if (action === 'rotate') { + (actionPerformed = this._rotateObject(x, y)) && this._fire('rotating', target, e); + } + else if (action === 'scale') { + (actionPerformed = this._onScale(e, transform, x, y)) && this._fire('scaling', target, e); + } + else if (action === 'scaleX') { + (actionPerformed = this._scaleObject(x, y, 'x')) && this._fire('scaling', target, e); + } + else if (action === 'scaleY') { + (actionPerformed = this._scaleObject(x, y, 'y')) && this._fire('scaling', target, e); + } + else if (action === 'skewX') { + (actionPerformed = this._skewObject(x, y, 'x')) && this._fire('skewing', target, e); + } + else if (action === 'skewY') { + (actionPerformed = this._skewObject(x, y, 'y')) && this._fire('skewing', target, e); + } + else { + actionPerformed = this._translateObject(x, y); + if (actionPerformed) { + this._fire('moving', target, e); + this.setCursor(target.moveCursor || this.moveCursor); + } + } + transform.actionPerformed = actionPerformed; + }, + + /** + * @private + */ + _fire: function(eventName, target, e) { + this.fire('object:' + eventName, { target: target, e: e }); + target.fire(eventName, { e: e }); + }, + + /** + * @private + */ + _beforeScaleTransform: function(e, transform) { + if (transform.action === 'scale' || transform.action === 'scaleX' || transform.action === 'scaleY') { + var centerTransform = this._shouldCenterTransform(transform.target); + + // Switch from a normal resize to center-based + if ((centerTransform && (transform.originX !== 'center' || transform.originY !== 'center')) || + // Switch from center-based resize to normal one + (!centerTransform && transform.originX === 'center' && transform.originY === 'center') + ) { + this._resetCurrentTransform(); + transform.reset = true; + } + } + }, + + /** + * @private + * @param {Event} e Event object + * @param {Object} transform current tranform + * @param {Number} x mouse position x from origin + * @param {Number} y mouse poistion y from origin + * @return {Boolean} true if the scaling occurred + */ + _onScale: function(e, transform, x, y) { + if ((e[this.uniScaleKey] || this.uniScaleTransform) && !transform.target.get('lockUniScaling')) { + transform.currentAction = 'scale'; + return this._scaleObject(x, y); + } + else { + // Switch from a normal resize to proportional + if (!transform.reset && transform.currentAction === 'scale') { + this._resetCurrentTransform(); + } + + transform.currentAction = 'scaleEqually'; + return this._scaleObject(x, y, 'equally'); + } + }, + + /** + * Sets the cursor depending on where the canvas is being hovered. + * Note: very buggy in Opera + * @param {Event} e Event object + * @param {Object} target Object that the mouse is hovering, if so. + */ + _setCursorFromEvent: function (e, target) { + if (!target) { + this.setCursor(this.defaultCursor); + return false; + } + + var hoverCursor = target.hoverCursor || this.hoverCursor; + if (!target.selectable) { + //let's skip _findTargetCorner if object is not selectable + this.setCursor(hoverCursor); + } + else { + var activeGroup = this.getActiveGroup(), + // only show proper corner when group selection is not active + corner = target._findTargetCorner + && (!activeGroup || !activeGroup.contains(target)) + && target._findTargetCorner(this.getPointer(e, true)); + + if (!corner) { + this.setCursor(hoverCursor); + } + else { + this._setCornerCursor(corner, target, e); + } + } + //actually unclear why it should return something + //is never evaluated + return true; + }, + + /** + * @private + */ + _setCornerCursor: function(corner, target, e) { + if (corner in cursorOffset) { + this.setCursor(this._getRotatedCornerCursor(corner, target, e)); + } + else if (corner === 'mtr' && target.hasRotatingPoint) { + this.setCursor(this.rotationCursor); + } + else { + this.setCursor(this.defaultCursor); + return false; + } + }, + + /** + * @private + */ + _getRotatedCornerCursor: function(corner, target, e) { + var n = Math.round((target.getAngle() % 360) / 45); + + if (n < 0) { + n += 8; // full circle ahead + } + n += cursorOffset[corner]; + if (e[this.altActionKey] && cursorOffset[corner] % 2 === 0) { + //if we are holding shift and we are on a mx corner... + n += 2; + } + // normalize n to be from 0 to 7 + n %= 8; + + return this.cursorMap[n]; + } + }); +})(); + + +(function() { + + var min = Math.min, + max = Math.max; + + fabric.util.object.extend(fabric.Canvas.prototype, /** @lends fabric.Canvas.prototype */ { + + /** + * @private + * @param {Event} e Event object + * @param {fabric.Object} target + * @return {Boolean} + */ + _shouldGroup: function(e, target) { + var activeObject = this.getActiveObject(); + return e[this.selectionKey] && target && target.selectable && + (this.getActiveGroup() || (activeObject && activeObject !== target)) + && this.selection; + }, + + /** + * @private + * @param {Event} e Event object + * @param {fabric.Object} target + */ + _handleGrouping: function (e, target) { + var activeGroup = this.getActiveGroup(); + + if (target === activeGroup) { + // if it's a group, find target again, using activeGroup objects + target = this.findTarget(e, true); + // if even object is not found, bail out + if (!target) { + return; + } + } + if (activeGroup) { + this._updateActiveGroup(target, e); + } + else { + this._createActiveGroup(target, e); + } + + if (this._activeGroup) { + this._activeGroup.saveCoords(); + } + }, + + /** + * @private + */ + _updateActiveGroup: function(target, e) { + var activeGroup = this.getActiveGroup(); + + if (activeGroup.contains(target)) { + + activeGroup.removeWithUpdate(target); + target.set('active', false); + + if (activeGroup.size() === 1) { + // remove group alltogether if after removal it only contains 1 object + this.discardActiveGroup(e); + // activate last remaining object + this.setActiveObject(activeGroup.item(0)); + return; + } + } + else { + activeGroup.addWithUpdate(target); + } + this.fire('selection:created', { target: activeGroup, e: e }); + activeGroup.set('active', true); + }, + + /** + * @private + */ + _createActiveGroup: function(target, e) { + + if (this._activeObject && target !== this._activeObject) { + + var group = this._createGroup(target); + group.addWithUpdate(); + + this.setActiveGroup(group); + this._activeObject = null; + + this.fire('selection:created', { target: group, e: e }); + } + + target.set('active', true); + }, + + /** + * @private + * @param {Object} target + */ + _createGroup: function(target) { + + var objects = this.getObjects(), + isActiveLower = objects.indexOf(this._activeObject) < objects.indexOf(target), + groupObjects = isActiveLower + ? [this._activeObject, target] + : [target, this._activeObject]; + this._activeObject.isEditing && this._activeObject.exitEditing(); + return new fabric.Group(groupObjects, { + canvas: this + }); + }, + + /** + * @private + * @param {Event} e mouse event + */ + _groupSelectedObjects: function (e) { + + var group = this._collectObjects(); + + // do not create group for 1 element only + if (group.length === 1) { + this.setActiveObject(group[0], e); + } + else if (group.length > 1) { + group = new fabric.Group(group.reverse(), { + canvas: this + }); + group.addWithUpdate(); + this.setActiveGroup(group, e); + group.saveCoords(); + this.fire('selection:created', { target: group }); + this.renderAll(); + } + }, + + /** + * @private + */ + _collectObjects: function() { + var group = [], + currentObject, + x1 = this._groupSelector.ex, + y1 = this._groupSelector.ey, + x2 = x1 + this._groupSelector.left, + y2 = y1 + this._groupSelector.top, + selectionX1Y1 = new fabric.Point(min(x1, x2), min(y1, y2)), + selectionX2Y2 = new fabric.Point(max(x1, x2), max(y1, y2)), + isClick = x1 === x2 && y1 === y2; + + for (var i = this._objects.length; i--; ) { + currentObject = this._objects[i]; + + if (!currentObject || !currentObject.selectable || !currentObject.visible) { + continue; + } + + if (currentObject.intersectsWithRect(selectionX1Y1, selectionX2Y2) || + currentObject.isContainedWithinRect(selectionX1Y1, selectionX2Y2) || + currentObject.containsPoint(selectionX1Y1) || + currentObject.containsPoint(selectionX2Y2) + ) { + currentObject.set('active', true); + group.push(currentObject); + + // only add one object if it's a click + if (isClick) { + break; + } + } + } + + return group; + }, + + /** + * @private + */ + _maybeGroupObjects: function(e) { + if (this.selection && this._groupSelector) { + this._groupSelectedObjects(e); + } + + var activeGroup = this.getActiveGroup(); + if (activeGroup) { + activeGroup.setObjectsCoords().setCoords(); + activeGroup.isMoving = false; + this.setCursor(this.defaultCursor); + } + + // clear selection and current transformation + this._groupSelector = null; + this._currentTransform = null; + } + }); + +})(); + + +(function () { + + var supportQuality = fabric.StaticCanvas.supports('toDataURLWithQuality'); + + fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ { + + /** + * Exports canvas element to a dataurl image. Note that when multiplier is used, cropping is scaled appropriately + * @param {Object} [options] Options object + * @param {String} [options.format=png] The format of the output image. Either "jpeg" or "png" + * @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg. + * @param {Number} [options.multiplier=1] Multiplier to scale by + * @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14 + * @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14 + * @param {Number} [options.width] Cropping width. Introduced in v1.2.14 + * @param {Number} [options.height] Cropping height. Introduced in v1.2.14 + * @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format + * @see {@link http://jsfiddle.net/fabricjs/NfZVb/|jsFiddle demo} + * @example Generate jpeg dataURL with lower quality + * var dataURL = canvas.toDataURL({ + * format: 'jpeg', + * quality: 0.8 + * }); + * @example Generate cropped png dataURL (clipping of canvas) + * var dataURL = canvas.toDataURL({ + * format: 'png', + * left: 100, + * top: 100, + * width: 200, + * height: 200 + * }); + * @example Generate double scaled png dataURL + * var dataURL = canvas.toDataURL({ + * format: 'png', + * multiplier: 2 + * }); + */ + toDataURL: function (options) { + options || (options = { }); + + var format = options.format || 'png', + quality = options.quality || 1, + multiplier = options.multiplier || 1, + cropping = { + left: options.left || 0, + top: options.top || 0, + width: options.width || 0, + height: options.height || 0, + }; + return this.__toDataURLWithMultiplier(format, quality, cropping, multiplier); + }, + + /** + * @private + */ + __toDataURLWithMultiplier: function(format, quality, cropping, multiplier) { + + var origWidth = this.getWidth(), + origHeight = this.getHeight(), + scaledWidth = (cropping.width || this.getWidth()) * multiplier, + scaledHeight = (cropping.height || this.getHeight()) * multiplier, + zoom = this.getZoom(), + newZoom = zoom * multiplier, + vp = this.viewportTransform, + translateX = (vp[4] - cropping.left) * multiplier, + translateY = (vp[5] - cropping.top) * multiplier, + newVp = [newZoom, 0, 0, newZoom, translateX, translateY], + originalInteractive = this.interactive; + + this.viewportTransform = newVp; + // setting interactive to false avoid exporting controls + this.interactive && (this.interactive = false); + if (origWidth !== scaledWidth || origHeight !== scaledHeight) { + // this.setDimensions is going to renderAll also; + this.setDimensions({ width: scaledWidth, height: scaledHeight }); + } + else { + this.renderAll(); + } + var data = this.__toDataURL(format, quality, cropping); + originalInteractive && (this.interactive = originalInteractive); + this.viewportTransform = vp; + //setDimensions with no option object is taking care of: + //this.width, this.height, this.renderAll() + this.setDimensions({ width: origWidth, height: origHeight }); + return data; + }, + + /** + * @private + */ + __toDataURL: function(format, quality) { + + var canvasEl = this.contextContainer.canvas; + // to avoid common confusion https://github.com/kangax/fabric.js/issues/806 + if (format === 'jpg') { + format = 'jpeg'; + } + + var data = supportQuality + ? canvasEl.toDataURL('image/' + format, quality) + : canvasEl.toDataURL('image/' + format); + + return data; + }, + + /** + * Exports canvas element to a dataurl image (allowing to change image size via multiplier). + * @deprecated since 1.0.13 + * @param {String} format (png|jpeg) + * @param {Number} multiplier + * @param {Number} quality (0..1) + * @return {String} + */ + toDataURLWithMultiplier: function (format, multiplier, quality) { + return this.toDataURL({ + format: format, + multiplier: multiplier, + quality: quality + }); + }, + }); + +})(); + + +fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ { + + /** + * Populates canvas with data from the specified dataless JSON. + * JSON format must conform to the one of {@link fabric.Canvas#toDatalessJSON} + * @deprecated since 1.2.2 + * @param {String|Object} json JSON string or object + * @param {Function} callback Callback, invoked when json is parsed + * and corresponding objects (e.g: {@link fabric.Image}) + * are initialized + * @param {Function} [reviver] Method for further parsing of JSON elements, called after each fabric object created. + * @return {fabric.Canvas} instance + * @chainable + * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#deserialization} + */ + loadFromDatalessJSON: function (json, callback, reviver) { + return this.loadFromJSON(json, callback, reviver); + }, + + /** + * Populates canvas with data from the specified JSON. + * JSON format must conform to the one of {@link fabric.Canvas#toJSON} + * @param {String|Object} json JSON string or object + * @param {Function} callback Callback, invoked when json is parsed + * and corresponding objects (e.g: {@link fabric.Image}) + * are initialized + * @param {Function} [reviver] Method for further parsing of JSON elements, called after each fabric object created. + * @return {fabric.Canvas} instance + * @chainable + * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#deserialization} + * @see {@link http://jsfiddle.net/fabricjs/fmgXt/|jsFiddle demo} + * @example loadFromJSON + * canvas.loadFromJSON(json, canvas.renderAll.bind(canvas)); + * @example loadFromJSON with reviver + * canvas.loadFromJSON(json, canvas.renderAll.bind(canvas), function(o, object) { + * // `o` = json object + * // `object` = fabric.Object instance + * // ... do some stuff ... + * }); + */ + loadFromJSON: function (json, callback, reviver) { + if (!json) { + return; + } + + // serialize if it wasn't already + var serialized = (typeof json === 'string') + ? JSON.parse(json) + : fabric.util.object.clone(json); + + this.clear(); + + var _this = this; + this._enlivenObjects(serialized.objects, function () { + _this._setBgOverlay(serialized, function () { + // remove parts i cannot set as options + delete serialized.objects; + delete serialized.backgroundImage; + delete serialized.overlayImage; + delete serialized.background; + delete serialized.overlay; + // this._initOptions does too many things to just + // call it. Normally loading an Object from JSON + // create the Object instance. Here the Canvas is + // already an instance and we are just loading things over it + for (var prop in serialized) { + _this[prop] = serialized[prop]; + } + callback && callback(); + }); + }, reviver); + return this; + }, + + /** + * @private + * @param {Object} serialized Object with background and overlay information + * @param {Function} callback Invoked after all background and overlay images/patterns loaded + */ + _setBgOverlay: function(serialized, callback) { + var _this = this, + loaded = { + backgroundColor: false, + overlayColor: false, + backgroundImage: false, + overlayImage: false + }; + + if (!serialized.backgroundImage && !serialized.overlayImage && !serialized.background && !serialized.overlay) { + callback && callback(); + return; + } + + var cbIfLoaded = function () { + if (loaded.backgroundImage && loaded.overlayImage && loaded.backgroundColor && loaded.overlayColor) { + _this.renderAll(); + callback && callback(); + } + }; + + this.__setBgOverlay('backgroundImage', serialized.backgroundImage, loaded, cbIfLoaded); + this.__setBgOverlay('overlayImage', serialized.overlayImage, loaded, cbIfLoaded); + this.__setBgOverlay('backgroundColor', serialized.background, loaded, cbIfLoaded); + this.__setBgOverlay('overlayColor', serialized.overlay, loaded, cbIfLoaded); + + cbIfLoaded(); + }, + + /** + * @private + * @param {String} property Property to set (backgroundImage, overlayImage, backgroundColor, overlayColor) + * @param {(Object|String)} value Value to set + * @param {Object} loaded Set loaded property to true if property is set + * @param {Object} callback Callback function to invoke after property is set + */ + __setBgOverlay: function(property, value, loaded, callback) { + var _this = this; + + if (!value) { + loaded[property] = true; + return; + } + + if (property === 'backgroundImage' || property === 'overlayImage') { + fabric.Image.fromObject(value, function(img) { + _this[property] = img; + loaded[property] = true; + callback && callback(); + }); + } + else { + this['set' + fabric.util.string.capitalize(property, true)](value, function() { + loaded[property] = true; + callback && callback(); + }); + } + }, + + /** + * @private + * @param {Array} objects + * @param {Function} callback + * @param {Function} [reviver] + */ + _enlivenObjects: function (objects, callback, reviver) { + var _this = this; + + if (!objects || objects.length === 0) { + callback && callback(); + return; + } + + var renderOnAddRemove = this.renderOnAddRemove; + this.renderOnAddRemove = false; + + fabric.util.enlivenObjects(objects, function(enlivenedObjects) { + enlivenedObjects.forEach(function(obj, index) { + // we splice the array just in case some custom classes restored from JSON + // will add more object to canvas at canvas init. + _this.insertAt(obj, index); + }); + + _this.renderOnAddRemove = renderOnAddRemove; + callback && callback(); + }, null, reviver); + }, + + /** + * @private + * @param {String} format + * @param {Function} callback + */ + _toDataURL: function (format, callback) { + this.clone(function (clone) { + callback(clone.toDataURL(format)); + }); + }, + + /** + * @private + * @param {String} format + * @param {Number} multiplier + * @param {Function} callback + */ + _toDataURLWithMultiplier: function (format, multiplier, callback) { + this.clone(function (clone) { + callback(clone.toDataURLWithMultiplier(format, multiplier)); + }); + }, + + /** + * Clones canvas instance + * @param {Object} [callback] Receives cloned instance as a first argument + * @param {Array} [properties] Array of properties to include in the cloned canvas and children + */ + clone: function (callback, properties) { + var data = JSON.stringify(this.toJSON(properties)); + this.cloneWithoutData(function(clone) { + clone.loadFromJSON(data, function() { + callback && callback(clone); + }); + }); + }, + + /** + * Clones canvas instance without cloning existing data. + * This essentially copies canvas dimensions, clipping properties, etc. + * but leaves data empty (so that you can populate it with your own) + * @param {Object} [callback] Receives cloned instance as a first argument + */ + cloneWithoutData: function(callback) { + var el = fabric.document.createElement('canvas'); + + el.width = this.getWidth(); + el.height = this.getHeight(); + + var clone = new fabric.Canvas(el); + clone.clipTo = this.clipTo; + if (this.backgroundImage) { + clone.setBackgroundImage(this.backgroundImage.src, function() { + clone.renderAll(); + callback && callback(clone); + }); + clone.backgroundImageOpacity = this.backgroundImageOpacity; + clone.backgroundImageStretch = this.backgroundImageStretch; + } + else { + callback && callback(clone); + } + } +}); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + toFixed = fabric.util.toFixed, + capitalize = fabric.util.string.capitalize, + degreesToRadians = fabric.util.degreesToRadians, + supportsLineDash = fabric.StaticCanvas.supports('setLineDash'); + + if (fabric.Object) { + return; + } + + /** + * Root object class from which all 2d shape classes inherit from + * @class fabric.Object + * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#objects} + * @see {@link fabric.Object#initialize} for constructor definition + * + * @fires added + * @fires removed + * + * @fires selected + * @fires deselected + * @fires modified + * @fires rotating + * @fires scaling + * @fires moving + * @fires skewing + * + * @fires mousedown + * @fires mouseup + * @fires mouseover + * @fires mouseout + */ + fabric.Object = fabric.util.createClass(/** @lends fabric.Object.prototype */ { + + /** + * Retrieves object's {@link fabric.Object#clipTo|clipping function} + * @method getClipTo + * @memberOf fabric.Object.prototype + * @return {Function} + */ + + /** + * Sets object's {@link fabric.Object#clipTo|clipping function} + * @method setClipTo + * @memberOf fabric.Object.prototype + * @param {Function} clipTo Clipping function + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#transformMatrix|transformMatrix} + * @method getTransformMatrix + * @memberOf fabric.Object.prototype + * @return {Array} transformMatrix + */ + + /** + * Sets object's {@link fabric.Object#transformMatrix|transformMatrix} + * @method setTransformMatrix + * @memberOf fabric.Object.prototype + * @param {Array} transformMatrix + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#visible|visible} state + * @method getVisible + * @memberOf fabric.Object.prototype + * @return {Boolean} True if visible + */ + + /** + * Sets object's {@link fabric.Object#visible|visible} state + * @method setVisible + * @memberOf fabric.Object.prototype + * @param {Boolean} value visible value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#shadow|shadow} + * @method getShadow + * @memberOf fabric.Object.prototype + * @return {Object} Shadow instance + */ + + /** + * Retrieves object's {@link fabric.Object#stroke|stroke} + * @method getStroke + * @memberOf fabric.Object.prototype + * @return {String} stroke value + */ + + /** + * Sets object's {@link fabric.Object#stroke|stroke} + * @method setStroke + * @memberOf fabric.Object.prototype + * @param {String} value stroke value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#strokeWidth|strokeWidth} + * @method getStrokeWidth + * @memberOf fabric.Object.prototype + * @return {Number} strokeWidth value + */ + + /** + * Sets object's {@link fabric.Object#strokeWidth|strokeWidth} + * @method setStrokeWidth + * @memberOf fabric.Object.prototype + * @param {Number} value strokeWidth value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#originX|originX} + * @method getOriginX + * @memberOf fabric.Object.prototype + * @return {String} originX value + */ + + /** + * Sets object's {@link fabric.Object#originX|originX} + * @method setOriginX + * @memberOf fabric.Object.prototype + * @param {String} value originX value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#originY|originY} + * @method getOriginY + * @memberOf fabric.Object.prototype + * @return {String} originY value + */ + + /** + * Sets object's {@link fabric.Object#originY|originY} + * @method setOriginY + * @memberOf fabric.Object.prototype + * @param {String} value originY value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#fill|fill} + * @method getFill + * @memberOf fabric.Object.prototype + * @return {String} Fill value + */ + + /** + * Sets object's {@link fabric.Object#fill|fill} + * @method setFill + * @memberOf fabric.Object.prototype + * @param {String} value Fill value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#opacity|opacity} + * @method getOpacity + * @memberOf fabric.Object.prototype + * @return {Number} Opacity value (0-1) + */ + + /** + * Sets object's {@link fabric.Object#opacity|opacity} + * @method setOpacity + * @memberOf fabric.Object.prototype + * @param {Number} value Opacity value (0-1) + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#angle|angle} (in degrees) + * @method getAngle + * @memberOf fabric.Object.prototype + * @return {Number} + */ + + /** + * Retrieves object's {@link fabric.Object#top|top position} + * @method getTop + * @memberOf fabric.Object.prototype + * @return {Number} Top value (in pixels) + */ + + /** + * Sets object's {@link fabric.Object#top|top position} + * @method setTop + * @memberOf fabric.Object.prototype + * @param {Number} value Top value (in pixels) + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#left|left position} + * @method getLeft + * @memberOf fabric.Object.prototype + * @return {Number} Left value (in pixels) + */ + + /** + * Sets object's {@link fabric.Object#left|left position} + * @method setLeft + * @memberOf fabric.Object.prototype + * @param {Number} value Left value (in pixels) + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#scaleX|scaleX} value + * @method getScaleX + * @memberOf fabric.Object.prototype + * @return {Number} scaleX value + */ + + /** + * Sets object's {@link fabric.Object#scaleX|scaleX} value + * @method setScaleX + * @memberOf fabric.Object.prototype + * @param {Number} value scaleX value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#scaleY|scaleY} value + * @method getScaleY + * @memberOf fabric.Object.prototype + * @return {Number} scaleY value + */ + + /** + * Sets object's {@link fabric.Object#scaleY|scaleY} value + * @method setScaleY + * @memberOf fabric.Object.prototype + * @param {Number} value scaleY value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#flipX|flipX} value + * @method getFlipX + * @memberOf fabric.Object.prototype + * @return {Boolean} flipX value + */ + + /** + * Sets object's {@link fabric.Object#flipX|flipX} value + * @method setFlipX + * @memberOf fabric.Object.prototype + * @param {Boolean} value flipX value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Retrieves object's {@link fabric.Object#flipY|flipY} value + * @method getFlipY + * @memberOf fabric.Object.prototype + * @return {Boolean} flipY value + */ + + /** + * Sets object's {@link fabric.Object#flipY|flipY} value + * @method setFlipY + * @memberOf fabric.Object.prototype + * @param {Boolean} value flipY value + * @return {fabric.Object} thisArg + * @chainable + */ + + /** + * Type of an object (rect, circle, path, etc.). + * Note that this property is meant to be read-only and not meant to be modified. + * If you modify, certain parts of Fabric (such as JSON loading) won't work correctly. + * @type String + * @default + */ + type: 'object', + + /** + * Horizontal origin of transformation of an object (one of "left", "right", "center") + * See http://jsfiddle.net/1ow02gea/40/ on how originX/originY affect objects in groups + * @type String + * @default + */ + originX: 'left', + + /** + * Vertical origin of transformation of an object (one of "top", "bottom", "center") + * See http://jsfiddle.net/1ow02gea/40/ on how originX/originY affect objects in groups + * @type String + * @default + */ + originY: 'top', + + /** + * Top position of an object. Note that by default it's relative to object top. You can change this by setting originY={top/center/bottom} + * @type Number + * @default + */ + top: 0, + + /** + * Left position of an object. Note that by default it's relative to object left. You can change this by setting originX={left/center/right} + * @type Number + * @default + */ + left: 0, + + /** + * Object width + * @type Number + * @default + */ + width: 0, + + /** + * Object height + * @type Number + * @default + */ + height: 0, + + /** + * Object scale factor (horizontal) + * @type Number + * @default + */ + scaleX: 1, + + /** + * Object scale factor (vertical) + * @type Number + * @default + */ + scaleY: 1, + + /** + * When true, an object is rendered as flipped horizontally + * @type Boolean + * @default + */ + flipX: false, + + /** + * When true, an object is rendered as flipped vertically + * @type Boolean + * @default + */ + flipY: false, + + /** + * Opacity of an object + * @type Number + * @default + */ + opacity: 1, + + /** + * Angle of rotation of an object (in degrees) + * @type Number + * @default + */ + angle: 0, + + /** + * Angle of skew on x axes of an object (in degrees) + * @type Number + * @default + */ + skewX: 0, + + /** + * Angle of skew on y axes of an object (in degrees) + * @type Number + * @default + */ + skewY: 0, + + /** + * Size of object's controlling corners (in pixels) + * @type Number + * @default + */ + cornerSize: 13, + + /** + * When true, object's controlling corners are rendered as transparent inside (i.e. stroke instead of fill) + * @type Boolean + * @default + */ + transparentCorners: true, + + /** + * Default cursor value used when hovering over this object on canvas + * @type String + * @default + */ + hoverCursor: null, + + /** + * Default cursor value used when moving this object on canvas + * @type String + * @default + */ + moveCursor: null, + + /** + * Padding between object and its controlling borders (in pixels) + * @type Number + * @default + */ + padding: 0, + + /** + * Color of controlling borders of an object (when it's active) + * @type String + * @default + */ + borderColor: 'rgba(102,153,255,0.75)', + + /** + * Array specifying dash pattern of an object's borders (hasBorder must be true) + * @since 1.6.2 + * @type Array + */ + borderDashArray: null, + + /** + * Color of controlling corners of an object (when it's active) + * @type String + * @default + */ + cornerColor: 'rgba(102,153,255,0.5)', + + /** + * Color of controlling corners of an object (when it's active and transparentCorners false) + * @since 1.6.2 + * @type String + * @default + */ + cornerStrokeColor: null, + + /** + * Specify style of control, 'rect' or 'circle' + * @since 1.6.2 + * @type String + */ + cornerStyle: 'rect', + + /** + * Array specifying dash pattern of an object's control (hasBorder must be true) + * @since 1.6.2 + * @type Array + */ + cornerDashArray: null, + + /** + * When true, this object will use center point as the origin of transformation + * when being scaled via the controls. + * Backwards incompatibility note: This property replaces "centerTransform" (Boolean). + * @since 1.3.4 + * @type Boolean + * @default + */ + centeredScaling: false, + + /** + * When true, this object will use center point as the origin of transformation + * when being rotated via the controls. + * Backwards incompatibility note: This property replaces "centerTransform" (Boolean). + * @since 1.3.4 + * @type Boolean + * @default + */ + centeredRotation: true, + + /** + * Color of object's fill + * @type String + * @default + */ + fill: 'rgb(0,0,0)', + + /** + * Fill rule used to fill an object + * accepted values are nonzero, evenodd + * Backwards incompatibility note: This property was used for setting globalCompositeOperation until v1.4.12 (use `fabric.Object#globalCompositeOperation` instead) + * @type String + * @default + */ + fillRule: 'nonzero', + + /** + * Composite rule used for canvas globalCompositeOperation + * @type String + * @default + */ + globalCompositeOperation: 'source-over', + + /** + * Background color of an object. Only works with text objects at the moment. + * @type String + * @default + */ + backgroundColor: '', + + /** + * Selection Background color of an object. colored layer behind the object when it is active. + * does not mix good with globalCompositeOperation methods. + * @type String + * @default + */ + selectionBackgroundColor: '', + + /** + * When defined, an object is rendered via stroke and this property specifies its color + * @type String + * @default + */ + stroke: null, + + /** + * Width of a stroke used to render this object + * @type Number + * @default + */ + strokeWidth: 1, + + /** + * Array specifying dash pattern of an object's stroke (stroke must be defined) + * @type Array + */ + strokeDashArray: null, + + /** + * Line endings style of an object's stroke (one of "butt", "round", "square") + * @type String + * @default + */ + strokeLineCap: 'butt', + + /** + * Corner style of an object's stroke (one of "bevil", "round", "miter") + * @type String + * @default + */ + strokeLineJoin: 'miter', + + /** + * Maximum miter length (used for strokeLineJoin = "miter") of an object's stroke + * @type Number + * @default + */ + strokeMiterLimit: 10, + + /** + * Shadow object representing shadow of this shape + * @type fabric.Shadow + * @default + */ + shadow: null, + + /** + * Opacity of object's controlling borders when object is active and moving + * @type Number + * @default + */ + borderOpacityWhenMoving: 0.4, + + /** + * Scale factor of object's controlling borders + * @type Number + * @default + */ + borderScaleFactor: 1, + + /** + * Transform matrix (similar to SVG's transform matrix) + * @type Array + */ + transformMatrix: null, + + /** + * Minimum allowed scale value of an object + * @type Number + * @default + */ + minScaleLimit: 0.01, + + /** + * When set to `false`, an object can not be selected for modification (using either point-click-based or group-based selection). + * But events still fire on it. + * @type Boolean + * @default + */ + selectable: true, + + /** + * When set to `false`, an object can not be a target of events. All events propagate through it. Introduced in v1.3.4 + * @type Boolean + * @default + */ + evented: true, + + /** + * When set to `false`, an object is not rendered on canvas + * @type Boolean + * @default + */ + visible: true, + + /** + * When set to `false`, object's controls are not displayed and can not be used to manipulate object + * @type Boolean + * @default + */ + hasControls: true, + + /** + * When set to `false`, object's controlling borders are not rendered + * @type Boolean + * @default + */ + hasBorders: true, + + /** + * When set to `false`, object's controlling rotating point will not be visible or selectable + * @type Boolean + * @default + */ + hasRotatingPoint: true, + + /** + * Offset for object's controlling rotating point (when enabled via `hasRotatingPoint`) + * @type Number + * @default + */ + rotatingPointOffset: 40, + + /** + * When set to `true`, objects are "found" on canvas on per-pixel basis rather than according to bounding box + * @type Boolean + * @default + */ + perPixelTargetFind: false, + + /** + * When `false`, default object's values are not included in its serialization + * @type Boolean + * @default + */ + includeDefaultValues: true, + + /** + * Function that determines clipping of an object (context is passed as a first argument) + * Note that context origin is at the object's center point (not left/top corner) + * @type Function + */ + clipTo: null, + + /** + * When `true`, object horizontal movement is locked + * @type Boolean + * @default + */ + lockMovementX: false, + + /** + * When `true`, object vertical movement is locked + * @type Boolean + * @default + */ + lockMovementY: false, + + /** + * When `true`, object rotation is locked + * @type Boolean + * @default + */ + lockRotation: false, + + /** + * When `true`, object horizontal scaling is locked + * @type Boolean + * @default + */ + lockScalingX: false, + + /** + * When `true`, object vertical scaling is locked + * @type Boolean + * @default + */ + lockScalingY: false, + + /** + * When `true`, object non-uniform scaling is locked + * @type Boolean + * @default + */ + lockUniScaling: false, + + /** + * When `true`, object horizontal skewing is locked + * @type Boolean + * @default + */ + lockSkewingX: false, + + /** + * When `true`, object vertical skewing is locked + * @type Boolean + * @default + */ + lockSkewingY: false, + + /** + * When `true`, object cannot be flipped by scaling into negative values + * @type Boolean + * @default + */ + + lockScalingFlip: false, + + /** + * When `true`, object is not exported in SVG or OBJECT/JSON + * since 1.6.3 + * @type Boolean + * @default + */ + + excludeFromExport: false, + + /** + * List of properties to consider when checking if state + * of an object is changed (fabric.Object#hasStateChanged) + * as well as for history (undo/redo) purposes + * @type Array + */ + stateProperties: ( + 'top left width height scaleX scaleY flipX flipY originX originY transformMatrix ' + + 'stroke strokeWidth strokeDashArray strokeLineCap strokeLineJoin strokeMiterLimit ' + + 'angle opacity fill fillRule globalCompositeOperation shadow clipTo visible backgroundColor ' + + 'skewX skewY' + ).split(' '), + + /** + * Constructor + * @param {Object} [options] Options object + */ + initialize: function(options) { + if (options) { + this.setOptions(options); + } + }, + + /** + * @private + * @param {Object} [options] Options object + */ + _initGradient: function(options) { + if (options.fill && options.fill.colorStops && !(options.fill instanceof fabric.Gradient)) { + this.set('fill', new fabric.Gradient(options.fill)); + } + if (options.stroke && options.stroke.colorStops && !(options.stroke instanceof fabric.Gradient)) { + this.set('stroke', new fabric.Gradient(options.stroke)); + } + }, + + /** + * @private + * @param {Object} [options] Options object + */ + _initPattern: function(options) { + if (options.fill && options.fill.source && !(options.fill instanceof fabric.Pattern)) { + this.set('fill', new fabric.Pattern(options.fill)); + } + if (options.stroke && options.stroke.source && !(options.stroke instanceof fabric.Pattern)) { + this.set('stroke', new fabric.Pattern(options.stroke)); + } + }, + + /** + * @private + * @param {Object} [options] Options object + */ + _initClipping: function(options) { + if (!options.clipTo || typeof options.clipTo !== 'string') { + return; + } + + var functionBody = fabric.util.getFunctionBody(options.clipTo); + if (typeof functionBody !== 'undefined') { + this.clipTo = new Function('ctx', functionBody); + } + }, + + /** + * Sets object's properties from options + * @param {Object} [options] Options object + */ + setOptions: function(options) { + for (var prop in options) { + this.set(prop, options[prop]); + } + this._initGradient(options); + this._initPattern(options); + this._initClipping(options); + }, + + /** + * Transforms context when rendering an object + * @param {CanvasRenderingContext2D} ctx Context + * @param {Boolean} fromLeft When true, context is transformed to object's top/left corner. This is used when rendering text on Node + */ + transform: function(ctx, fromLeft) { + if (this.group && !this.group._transformDone && this.group === this.canvas._activeGroup) { + this.group.transform(ctx); + } + var center = fromLeft ? this._getLeftTopCoords() : this.getCenterPoint(); + ctx.translate(center.x, center.y); + ctx.rotate(degreesToRadians(this.angle)); + ctx.scale( + this.scaleX * (this.flipX ? -1 : 1), + this.scaleY * (this.flipY ? -1 : 1) + ); + ctx.transform(1, 0, Math.tan(degreesToRadians(this.skewX)), 1, 0, 0); + ctx.transform(1, Math.tan(degreesToRadians(this.skewY)), 0, 1, 0, 0); + }, + + /** + * Returns an object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} Object representation of an instance + */ + toObject: function(propertiesToInclude) { + var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS, + + object = { + type: this.type, + originX: this.originX, + originY: this.originY, + left: toFixed(this.left, NUM_FRACTION_DIGITS), + top: toFixed(this.top, NUM_FRACTION_DIGITS), + width: toFixed(this.width, NUM_FRACTION_DIGITS), + height: toFixed(this.height, NUM_FRACTION_DIGITS), + fill: (this.fill && this.fill.toObject) ? this.fill.toObject() : this.fill, + stroke: (this.stroke && this.stroke.toObject) ? this.stroke.toObject() : this.stroke, + strokeWidth: toFixed(this.strokeWidth, NUM_FRACTION_DIGITS), + strokeDashArray: this.strokeDashArray ? this.strokeDashArray.concat() : this.strokeDashArray, + strokeLineCap: this.strokeLineCap, + strokeLineJoin: this.strokeLineJoin, + strokeMiterLimit: toFixed(this.strokeMiterLimit, NUM_FRACTION_DIGITS), + scaleX: toFixed(this.scaleX, NUM_FRACTION_DIGITS), + scaleY: toFixed(this.scaleY, NUM_FRACTION_DIGITS), + angle: toFixed(this.getAngle(), NUM_FRACTION_DIGITS), + flipX: this.flipX, + flipY: this.flipY, + opacity: toFixed(this.opacity, NUM_FRACTION_DIGITS), + shadow: (this.shadow && this.shadow.toObject) ? this.shadow.toObject() : this.shadow, + visible: this.visible, + clipTo: this.clipTo && String(this.clipTo), + backgroundColor: this.backgroundColor, + fillRule: this.fillRule, + globalCompositeOperation: this.globalCompositeOperation, + transformMatrix: this.transformMatrix ? this.transformMatrix.concat() : this.transformMatrix, + skewX: toFixed(this.skewX, NUM_FRACTION_DIGITS), + skewY: toFixed(this.skewY, NUM_FRACTION_DIGITS) + }; + + fabric.util.populateWithProperties(this, object, propertiesToInclude); + + if (!this.includeDefaultValues) { + object = this._removeDefaultValues(object); + } + + return object; + }, + + /** + * Returns (dataless) object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} Object representation of an instance + */ + toDatalessObject: function(propertiesToInclude) { + // will be overwritten by subclasses + return this.toObject(propertiesToInclude); + }, + + /** + * @private + * @param {Object} object + */ + _removeDefaultValues: function(object) { + var prototype = fabric.util.getKlass(object.type).prototype, + stateProperties = prototype.stateProperties; + stateProperties.forEach(function(prop) { + if (object[prop] === prototype[prop]) { + delete object[prop]; + } + var isArray = Object.prototype.toString.call(object[prop]) === '[object Array]' && + Object.prototype.toString.call(prototype[prop]) === '[object Array]'; + + // basically a check for [] === [] + if (isArray && object[prop].length === 0 && prototype[prop].length === 0) { + delete object[prop]; + } + }); + + return object; + }, + + /** + * Returns a string representation of an instance + * @return {String} + */ + toString: function() { + return '#'; + }, + + /** + * Basic getter + * @param {String} property Property name + * @return {*} value of a property + */ + get: function(property) { + return this[property]; + }, + + /** + * Return the object scale factor counting also the group scaling + * @return {Object} object with scaleX and scaleY properties + */ + getObjectScaling: function() { + var scaleX = this.scaleX, scaleY = this.scaleY; + if (this.group) { + var scaling = this.group.getObjectScaling(); + scaleX *= scaling.scaleX; + scaleY *= scaling.scaleY; + } + return { scaleX: scaleX, scaleY: scaleY }; + }, + + /** + * @private + */ + _setObject: function(obj) { + for (var prop in obj) { + this._set(prop, obj[prop]); + } + }, + + /** + * Sets property to a given value. When changing position/dimension -related properties (left, top, scale, angle, etc.) `set` does not update position of object's borders/controls. If you need to update those, call `setCoords()`. + * @param {String|Object} key Property name or object (if object, iterate over the object properties) + * @param {Object|Function} value Property value (if function, the value is passed into it and its return value is used as a new one) + * @return {fabric.Object} thisArg + * @chainable + */ + set: function(key, value) { + if (typeof key === 'object') { + this._setObject(key); + } + else { + if (typeof value === 'function' && key !== 'clipTo') { + this._set(key, value(this.get(key))); + } + else { + this._set(key, value); + } + } + return this; + }, + + /** + * @private + * @param {String} key + * @param {*} value + * @return {fabric.Object} thisArg + */ + _set: function(key, value) { + var shouldConstrainValue = (key === 'scaleX' || key === 'scaleY'); + + if (shouldConstrainValue) { + value = this._constrainScale(value); + } + if (key === 'scaleX' && value < 0) { + this.flipX = !this.flipX; + value *= -1; + } + else if (key === 'scaleY' && value < 0) { + this.flipY = !this.flipY; + value *= -1; + } + else if (key === 'shadow' && value && !(value instanceof fabric.Shadow)) { + value = new fabric.Shadow(value); + } + + this[key] = value; + + if (key === 'width' || key === 'height') { + this.minScaleLimit = Math.min(0.1, 1 / Math.max(this.width, this.height)); + } + + return this; + }, + + /** + * This callback function is called by the parent group of an object every + * time a non-delegated property changes on the group. It is passed the key + * and value as parameters. Not adding in this function's signature to avoid + * Travis build error about unused variables. + */ + setOnGroup: function() { + // implemented by sub-classes, as needed. + }, + + /** + * Toggles specified property from `true` to `false` or from `false` to `true` + * @param {String} property Property to toggle + * @return {fabric.Object} thisArg + * @chainable + */ + toggle: function(property) { + var value = this.get(property); + if (typeof value === 'boolean') { + this.set(property, !value); + } + return this; + }, + + /** + * Sets sourcePath of an object + * @param {String} value Value to set sourcePath to + * @return {fabric.Object} thisArg + * @chainable + */ + setSourcePath: function(value) { + this.sourcePath = value; + return this; + }, + + /** + * Retrieves viewportTransform from Object's canvas if possible + * @method getViewportTransform + * @memberOf fabric.Object.prototype + * @return {Boolean} flipY value // TODO + */ + getViewportTransform: function() { + if (this.canvas && this.canvas.viewportTransform) { + return this.canvas.viewportTransform; + } + return [1, 0, 0, 1, 0, 0]; + }, + + /** + * Renders an object on a specified context + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} [noTransform] When true, context is not transformed + */ + render: function(ctx, noTransform) { + // do not render if width/height are zeros or object is not visible + if ((this.width === 0 && this.height === 0) || !this.visible) { + return; + } + + ctx.save(); + + //setup fill rule for current object + this._setupCompositeOperation(ctx); + this.drawSelectionBackground(ctx); + if (!noTransform) { + this.transform(ctx); + } + this._setOpacity(ctx); + this._setShadow(ctx); + this._renderBackground(ctx); + this._setStrokeStyles(ctx); + this._setFillStyles(ctx); + if (this.transformMatrix) { + ctx.transform.apply(ctx, this.transformMatrix); + } + this.clipTo && fabric.util.clipContext(this, ctx); + this._render(ctx, noTransform); + this.clipTo && ctx.restore(); + + ctx.restore(); + }, + + /** + * Draws a background for the object big as its width and height; + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderBackground: function(ctx) { + if (!this.backgroundColor) { + return; + } + + ctx.fillStyle = this.backgroundColor; + + ctx.fillRect( + -this.width / 2, + -this.height / 2, + this.width, + this.height + ); + // if there is background color no other shadows + // should be casted + this._removeShadow(ctx); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _setOpacity: function(ctx) { + if (this.group) { + this.group._setOpacity(ctx); + } + ctx.globalAlpha *= this.opacity; + }, + + _setStrokeStyles: function(ctx) { + if (this.stroke) { + ctx.lineWidth = this.strokeWidth; + ctx.lineCap = this.strokeLineCap; + ctx.lineJoin = this.strokeLineJoin; + ctx.miterLimit = this.strokeMiterLimit; + ctx.strokeStyle = this.stroke.toLive + ? this.stroke.toLive(ctx, this) + : this.stroke; + } + }, + + _setFillStyles: function(ctx) { + if (this.fill) { + ctx.fillStyle = this.fill.toLive + ? this.fill.toLive(ctx, this) + : this.fill; + } + }, + + /** + * @private + * Sets line dash + * @param {CanvasRenderingContext2D} ctx Context to set the dash line on + * @param {Array} dashArray array representing dashes + * @param {Function} alternative function to call if browaser does not support lineDash + */ + _setLineDash: function(ctx, dashArray, alternative) { + if (!dashArray) { + return; + } + // Spec requires the concatenation of two copies the dash list when the number of elements is odd + if (1 & dashArray.length) { + dashArray.push.apply(dashArray, dashArray); + } + if (supportsLineDash) { + ctx.setLineDash(dashArray); + } + else { + alternative && alternative(ctx); + } + }, + + /** + * Renders controls and borders for the object + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} [noTransform] When true, context is not transformed + */ + _renderControls: function(ctx, noTransform) { + if (!this.active || noTransform + || (this.group && this.group !== this.canvas.getActiveGroup())) { + return; + } + + var vpt = this.getViewportTransform(), + matrix = this.calcTransformMatrix(), + options; + matrix = fabric.util.multiplyTransformMatrices(vpt, matrix); + options = fabric.util.qrDecompose(matrix); + + ctx.save(); + ctx.translate(options.translateX, options.translateY); + ctx.lineWidth = 1 * this.borderScaleFactor; + ctx.globalAlpha = this.isMoving ? this.borderOpacityWhenMoving : 1; + + if (this.group && this.group === this.canvas.getActiveGroup()) { + ctx.rotate(degreesToRadians(options.angle)); + this.drawBordersInGroup(ctx, options); + } + else { + ctx.rotate(degreesToRadians(this.angle)); + this.drawBorders(ctx); + } + this.drawControls(ctx); + ctx.restore(); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _setShadow: function(ctx) { + if (!this.shadow) { + return; + } + + var multX = (this.canvas && this.canvas.viewportTransform[0]) || 1, + multY = (this.canvas && this.canvas.viewportTransform[3]) || 1, + scaling = this.getObjectScaling(); + if (this.canvas && this.canvas._isRetinaScaling()) { + multX *= fabric.devicePixelRatio; + multY *= fabric.devicePixelRatio; + } + ctx.shadowColor = this.shadow.color; + ctx.shadowBlur = this.shadow.blur * (multX + multY) * (scaling.scaleX + scaling.scaleY) / 4; + ctx.shadowOffsetX = this.shadow.offsetX * multX * scaling.scaleX; + ctx.shadowOffsetY = this.shadow.offsetY * multY * scaling.scaleY; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _removeShadow: function(ctx) { + if (!this.shadow) { + return; + } + + ctx.shadowColor = ''; + ctx.shadowBlur = ctx.shadowOffsetX = ctx.shadowOffsetY = 0; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderFill: function(ctx) { + if (!this.fill) { + return; + } + + ctx.save(); + if (this.fill.gradientTransform) { + var g = this.fill.gradientTransform; + ctx.transform.apply(ctx, g); + } + if (this.fill.toLive) { + ctx.translate( + -this.width / 2 + this.fill.offsetX || 0, + -this.height / 2 + this.fill.offsetY || 0); + } + if (this.fillRule === 'evenodd') { + ctx.fill('evenodd'); + } + else { + ctx.fill(); + } + ctx.restore(); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderStroke: function(ctx) { + if (!this.stroke || this.strokeWidth === 0) { + return; + } + + if (this.shadow && !this.shadow.affectStroke) { + this._removeShadow(ctx); + } + + ctx.save(); + + this._setLineDash(ctx, this.strokeDashArray, this._renderDashedStroke); + if (this.stroke.gradientTransform) { + var g = this.stroke.gradientTransform; + ctx.transform.apply(ctx, g); + } + if (this.stroke.toLive) { + ctx.translate( + -this.width / 2 + this.stroke.offsetX || 0, + -this.height / 2 + this.stroke.offsetY || 0); + } + ctx.stroke(); + ctx.restore(); + }, + + /** + * Clones an instance, some objects are async, so using callback method will work for every object. + * Using the direct return does not work for images and groups. + * @param {Function} callback Callback is invoked with a clone as a first argument + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {fabric.Object} clone of an instance + */ + clone: function(callback, propertiesToInclude) { + if (this.constructor.fromObject) { + return this.constructor.fromObject(this.toObject(propertiesToInclude), callback); + } + return new fabric.Object(this.toObject(propertiesToInclude)); + }, + + /** + * Creates an instance of fabric.Image out of an object + * @param {Function} callback callback, invoked with an instance as a first argument + * @param {Object} [options] for clone as image, passed to toDataURL + * @param {Boolean} [options.enableRetinaScaling] enable retina scaling for the cloned image + * @return {fabric.Object} thisArg + */ + cloneAsImage: function(callback, options) { + var dataUrl = this.toDataURL(options); + fabric.util.loadImage(dataUrl, function(img) { + if (callback) { + callback(new fabric.Image(img)); + } + }); + return this; + }, + + /** + * Converts an object into a data-url-like string + * @param {Object} options Options object + * @param {String} [options.format=png] The format of the output image. Either "jpeg" or "png" + * @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg. + * @param {Number} [options.multiplier=1] Multiplier to scale by + * @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14 + * @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14 + * @param {Number} [options.width] Cropping width. Introduced in v1.2.14 + * @param {Number} [options.height] Cropping height. Introduced in v1.2.14 + * @param {Boolean} [options.enableRetina] Enable retina scaling for clone image. Introduce in 1.6.4 + * @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format + */ + toDataURL: function(options) { + options || (options = { }); + + var el = fabric.util.createCanvasElement(), + boundingRect = this.getBoundingRect(); + + el.width = boundingRect.width; + el.height = boundingRect.height; + fabric.util.wrapElement(el, 'div'); + var canvas = new fabric.StaticCanvas(el, { enableRetinaScaling: options.enableRetinaScaling }); + // to avoid common confusion https://github.com/kangax/fabric.js/issues/806 + if (options.format === 'jpg') { + options.format = 'jpeg'; + } + + if (options.format === 'jpeg') { + canvas.backgroundColor = '#fff'; + } + + var origParams = { + active: this.get('active'), + left: this.getLeft(), + top: this.getTop() + }; + + this.set('active', false); + this.setPositionByOrigin(new fabric.Point(canvas.getWidth() / 2, canvas.getHeight() / 2), 'center', 'center'); + + var originalCanvas = this.canvas; + canvas.add(this); + var data = canvas.toDataURL(options); + + this.set(origParams).setCoords(); + this.canvas = originalCanvas; + + canvas.dispose(); + canvas = null; + + return data; + }, + + /** + * Returns true if specified type is identical to the type of an instance + * @param {String} type Type to check against + * @return {Boolean} + */ + isType: function(type) { + return this.type === type; + }, + + /** + * Returns complexity of an instance + * @return {Number} complexity of this instance + */ + complexity: function() { + return 0; + }, + + /** + * Returns a JSON representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} JSON + */ + toJSON: function(propertiesToInclude) { + // delegate, not alias + return this.toObject(propertiesToInclude); + }, + + /** + * Sets gradient (fill or stroke) of an object + * Backwards incompatibility note: This method was named "setGradientFill" until v1.1.0 + * @param {String} property Property name 'stroke' or 'fill' + * @param {Object} [options] Options object + * @param {String} [options.type] Type of gradient 'radial' or 'linear' + * @param {Number} [options.x1=0] x-coordinate of start point + * @param {Number} [options.y1=0] y-coordinate of start point + * @param {Number} [options.x2=0] x-coordinate of end point + * @param {Number} [options.y2=0] y-coordinate of end point + * @param {Number} [options.r1=0] Radius of start point (only for radial gradients) + * @param {Number} [options.r2=0] Radius of end point (only for radial gradients) + * @param {Object} [options.colorStops] Color stops object eg. {0: 'ff0000', 1: '000000'} + * @param {Object} [options.gradientTransform] transforMatrix for gradient + * @return {fabric.Object} thisArg + * @chainable + * @see {@link http://jsfiddle.net/fabricjs/58y8b/|jsFiddle demo} + * @example Set linear gradient + * object.setGradient('fill', { + * type: 'linear', + * x1: -object.width / 2, + * y1: 0, + * x2: object.width / 2, + * y2: 0, + * colorStops: { + * 0: 'red', + * 0.5: '#005555', + * 1: 'rgba(0,0,255,0.5)' + * } + * }); + * canvas.renderAll(); + * @example Set radial gradient + * object.setGradient('fill', { + * type: 'radial', + * x1: 0, + * y1: 0, + * x2: 0, + * y2: 0, + * r1: object.width / 2, + * r2: 10, + * colorStops: { + * 0: 'red', + * 0.5: '#005555', + * 1: 'rgba(0,0,255,0.5)' + * } + * }); + * canvas.renderAll(); + */ + setGradient: function(property, options) { + options || (options = { }); + + var gradient = { colorStops: [] }; + + gradient.type = options.type || (options.r1 || options.r2 ? 'radial' : 'linear'); + gradient.coords = { + x1: options.x1, + y1: options.y1, + x2: options.x2, + y2: options.y2 + }; + + if (options.r1 || options.r2) { + gradient.coords.r1 = options.r1; + gradient.coords.r2 = options.r2; + } + + options.gradientTransform && (gradient.gradientTransform = options.gradientTransform); + + for (var position in options.colorStops) { + var color = new fabric.Color(options.colorStops[position]); + gradient.colorStops.push({ + offset: position, + color: color.toRgb(), + opacity: color.getAlpha() + }); + } + + return this.set(property, fabric.Gradient.forObject(this, gradient)); + }, + + /** + * Sets pattern fill of an object + * @param {Object} options Options object + * @param {(String|HTMLImageElement)} options.source Pattern source + * @param {String} [options.repeat=repeat] Repeat property of a pattern (one of repeat, repeat-x, repeat-y or no-repeat) + * @param {Number} [options.offsetX=0] Pattern horizontal offset from object's left/top corner + * @param {Number} [options.offsetY=0] Pattern vertical offset from object's left/top corner + * @return {fabric.Object} thisArg + * @chainable + * @see {@link http://jsfiddle.net/fabricjs/QT3pa/|jsFiddle demo} + * @example Set pattern + * fabric.util.loadImage('http://fabricjs.com/assets/escheresque_ste.png', function(img) { + * object.setPatternFill({ + * source: img, + * repeat: 'repeat' + * }); + * canvas.renderAll(); + * }); + */ + setPatternFill: function(options) { + return this.set('fill', new fabric.Pattern(options)); + }, + + /** + * Sets {@link fabric.Object#shadow|shadow} of an object + * @param {Object|String} [options] Options object or string (e.g. "2px 2px 10px rgba(0,0,0,0.2)") + * @param {String} [options.color=rgb(0,0,0)] Shadow color + * @param {Number} [options.blur=0] Shadow blur + * @param {Number} [options.offsetX=0] Shadow horizontal offset + * @param {Number} [options.offsetY=0] Shadow vertical offset + * @return {fabric.Object} thisArg + * @chainable + * @see {@link http://jsfiddle.net/fabricjs/7gvJG/|jsFiddle demo} + * @example Set shadow with string notation + * object.setShadow('2px 2px 10px rgba(0,0,0,0.2)'); + * canvas.renderAll(); + * @example Set shadow with object notation + * object.setShadow({ + * color: 'red', + * blur: 10, + * offsetX: 20, + * offsetY: 20 + * }); + * canvas.renderAll(); + */ + setShadow: function(options) { + return this.set('shadow', options ? new fabric.Shadow(options) : null); + }, + + /** + * Sets "color" of an instance (alias of `set('fill', …)`) + * @param {String} color Color value + * @return {fabric.Object} thisArg + * @chainable + */ + setColor: function(color) { + this.set('fill', color); + return this; + }, + + /** + * Sets "angle" of an instance + * @param {Number} angle Angle value (in degrees) + * @return {fabric.Object} thisArg + * @chainable + */ + setAngle: function(angle) { + var shouldCenterOrigin = (this.originX !== 'center' || this.originY !== 'center') && this.centeredRotation; + + if (shouldCenterOrigin) { + this._setOriginToCenter(); + } + + this.set('angle', angle); + + if (shouldCenterOrigin) { + this._resetOrigin(); + } + + return this; + }, + + /** + * Centers object horizontally on canvas to which it was added last. + * You might need to call `setCoords` on an object after centering, to update controls area. + * @return {fabric.Object} thisArg + * @chainable + */ + centerH: function () { + this.canvas && this.canvas.centerObjectH(this); + return this; + }, + + /** + * Centers object horizontally on current viewport of canvas to which it was added last. + * You might need to call `setCoords` on an object after centering, to update controls area. + * @return {fabric.Object} thisArg + * @chainable + */ + viewportCenterH: function () { + this.canvas && this.canvas.viewportCenterObjectH(this); + return this; + }, + + /** + * Centers object vertically on canvas to which it was added last. + * You might need to call `setCoords` on an object after centering, to update controls area. + * @return {fabric.Object} thisArg + * @chainable + */ + centerV: function () { + this.canvas && this.canvas.centerObjectV(this); + return this; + }, + + /** + * Centers object vertically on current viewport of canvas to which it was added last. + * You might need to call `setCoords` on an object after centering, to update controls area. + * @return {fabric.Object} thisArg + * @chainable + */ + viewportCenterV: function () { + this.canvas && this.canvas.viewportCenterObjectV(this); + return this; + }, + + /** + * Centers object vertically and horizontally on canvas to which is was added last + * You might need to call `setCoords` on an object after centering, to update controls area. + * @return {fabric.Object} thisArg + * @chainable + */ + center: function () { + this.canvas && this.canvas.centerObject(this); + return this; + }, + + /** + * Centers object on current viewport of canvas to which it was added last. + * You might need to call `setCoords` on an object after centering, to update controls area. + * @return {fabric.Object} thisArg + * @chainable + */ + viewportCenter: function () { + this.canvas && this.canvas.viewportCenterObject(this); + return this; + }, + + /** + * Removes object from canvas to which it was added last + * @return {fabric.Object} thisArg + * @chainable + */ + remove: function() { + this.canvas && this.canvas.remove(this); + return this; + }, + + /** + * Returns coordinates of a pointer relative to an object + * @param {Event} e Event to operate upon + * @param {Object} [pointer] Pointer to operate upon (instead of event) + * @return {Object} Coordinates of a pointer (x, y) + */ + getLocalPointer: function(e, pointer) { + pointer = pointer || this.canvas.getPointer(e); + var pClicked = new fabric.Point(pointer.x, pointer.y), + objectLeftTop = this._getLeftTopCoords(); + if (this.angle) { + pClicked = fabric.util.rotatePoint( + pClicked, objectLeftTop, fabric.util.degreesToRadians(-this.angle)); + } + return { + x: pClicked.x - objectLeftTop.x, + y: pClicked.y - objectLeftTop.y + }; + }, + + /** + * Sets canvas globalCompositeOperation for specific object + * custom composition operation for the particular object can be specifed using globalCompositeOperation property + * @param {CanvasRenderingContext2D} ctx Rendering canvas context + */ + _setupCompositeOperation: function (ctx) { + if (this.globalCompositeOperation) { + ctx.globalCompositeOperation = this.globalCompositeOperation; + } + } + }); + + fabric.util.createAccessors(fabric.Object); + + /** + * Alias for {@link fabric.Object.prototype.setAngle} + * @alias rotate -> setAngle + * @memberOf fabric.Object + */ + fabric.Object.prototype.rotate = fabric.Object.prototype.setAngle; + + extend(fabric.Object.prototype, fabric.Observable); + + /** + * Defines the number of fraction digits to use when serializing object values. + * You can use it to increase/decrease precision of such values like left, top, scaleX, scaleY, etc. + * @static + * @memberOf fabric.Object + * @constant + * @type Number + */ + fabric.Object.NUM_FRACTION_DIGITS = 2; + + /** + * Unique id used internally when creating SVG elements + * @static + * @memberOf fabric.Object + * @type Number + */ + fabric.Object.__uid = 0; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function() { + + var degreesToRadians = fabric.util.degreesToRadians, + originXOffset = { + left: -0.5, + center: 0, + right: 0.5 + }, + originYOffset = { + top: -0.5, + center: 0, + bottom: 0.5 + }; + + fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ { + + /** + * Translates the coordinates from origin to center coordinates (based on the object's dimensions) + * @param {fabric.Point} point The point which corresponds to the originX and originY params + * @param {String} fromOriginX Horizontal origin: 'left', 'center' or 'right' + * @param {String} fromOriginY Vertical origin: 'top', 'center' or 'bottom' + * @param {String} toOriginX Horizontal origin: 'left', 'center' or 'right' + * @param {String} toOriginY Vertical origin: 'top', 'center' or 'bottom' + * @return {fabric.Point} + */ + translateToGivenOrigin: function(point, fromOriginX, fromOriginY, toOriginX, toOriginY) { + var x = point.x, + y = point.y, + offsetX, offsetY, dim; + + if (typeof fromOriginX === 'string') { + fromOriginX = originXOffset[fromOriginX]; + } + else { + fromOriginX -= 0.5; + } + + if (typeof toOriginX === 'string') { + toOriginX = originXOffset[toOriginX]; + } + else { + toOriginX -= 0.5; + } + + offsetX = toOriginX - fromOriginX; + + if (typeof fromOriginY === 'string') { + fromOriginY = originYOffset[fromOriginY]; + } + else { + fromOriginY -= 0.5; + } + + if (typeof toOriginY === 'string') { + toOriginY = originYOffset[toOriginY]; + } + else { + toOriginY -= 0.5; + } + + offsetY = toOriginY - fromOriginY; + + if (offsetX || offsetY) { + dim = this._getTransformedDimensions(); + x = point.x + offsetX * dim.x; + y = point.y + offsetY * dim.y; + } + + return new fabric.Point(x, y); + }, + + /** + * Translates the coordinates from origin to center coordinates (based on the object's dimensions) + * @param {fabric.Point} point The point which corresponds to the originX and originY params + * @param {String} originX Horizontal origin: 'left', 'center' or 'right' + * @param {String} originY Vertical origin: 'top', 'center' or 'bottom' + * @return {fabric.Point} + */ + translateToCenterPoint: function(point, originX, originY) { + var p = this.translateToGivenOrigin(point, originX, originY, 'center', 'center'); + if (this.angle) { + return fabric.util.rotatePoint(p, point, degreesToRadians(this.angle)); + } + return p; + }, + + /** + * Translates the coordinates from center to origin coordinates (based on the object's dimensions) + * @param {fabric.Point} center The point which corresponds to center of the object + * @param {String} originX Horizontal origin: 'left', 'center' or 'right' + * @param {String} originY Vertical origin: 'top', 'center' or 'bottom' + * @return {fabric.Point} + */ + translateToOriginPoint: function(center, originX, originY) { + var p = this.translateToGivenOrigin(center, 'center', 'center', originX, originY); + if (this.angle) { + return fabric.util.rotatePoint(p, center, degreesToRadians(this.angle)); + } + return p; + }, + + /** + * Returns the real center coordinates of the object + * @return {fabric.Point} + */ + getCenterPoint: function() { + var leftTop = new fabric.Point(this.left, this.top); + return this.translateToCenterPoint(leftTop, this.originX, this.originY); + }, + + /** + * Returns the coordinates of the object based on center coordinates + * @param {fabric.Point} point The point which corresponds to the originX and originY params + * @return {fabric.Point} + */ + // getOriginPoint: function(center) { + // return this.translateToOriginPoint(center, this.originX, this.originY); + // }, + + /** + * Returns the coordinates of the object as if it has a different origin + * @param {String} originX Horizontal origin: 'left', 'center' or 'right' + * @param {String} originY Vertical origin: 'top', 'center' or 'bottom' + * @return {fabric.Point} + */ + getPointByOrigin: function(originX, originY) { + var center = this.getCenterPoint(); + return this.translateToOriginPoint(center, originX, originY); + }, + + /** + * Returns the point in local coordinates + * @param {fabric.Point} point The point relative to the global coordinate system + * @param {String} originX Horizontal origin: 'left', 'center' or 'right' + * @param {String} originY Vertical origin: 'top', 'center' or 'bottom' + * @return {fabric.Point} + */ + toLocalPoint: function(point, originX, originY) { + var center = this.getCenterPoint(), + p, p2; + + if (typeof originX !== 'undefined' && typeof originY !== 'undefined' ) { + p = this.translateToGivenOrigin(center, 'center', 'center', originX, originY); + } + else { + p = new fabric.Point(this.left, this.top); + } + + p2 = new fabric.Point(point.x, point.y); + if (this.angle) { + p2 = fabric.util.rotatePoint(p2, center, -degreesToRadians(this.angle)); + } + return p2.subtractEquals(p); + }, + + /** + * Returns the point in global coordinates + * @param {fabric.Point} The point relative to the local coordinate system + * @return {fabric.Point} + */ + // toGlobalPoint: function(point) { + // return fabric.util.rotatePoint(point, this.getCenterPoint(), degreesToRadians(this.angle)).addEquals(new fabric.Point(this.left, this.top)); + // }, + + /** + * Sets the position of the object taking into consideration the object's origin + * @param {fabric.Point} pos The new position of the object + * @param {String} originX Horizontal origin: 'left', 'center' or 'right' + * @param {String} originY Vertical origin: 'top', 'center' or 'bottom' + * @return {void} + */ + setPositionByOrigin: function(pos, originX, originY) { + var center = this.translateToCenterPoint(pos, originX, originY), + position = this.translateToOriginPoint(center, this.originX, this.originY); + + this.set('left', position.x); + this.set('top', position.y); + }, + + /** + * @param {String} to One of 'left', 'center', 'right' + */ + adjustPosition: function(to) { + var angle = degreesToRadians(this.angle), + hypotFull = this.getWidth(), + xFull = Math.cos(angle) * hypotFull, + yFull = Math.sin(angle) * hypotFull, + offsetFrom, offsetTo; + + //TODO: this function does not consider mixed situation like top, center. + if (typeof this.originX === 'string') { + offsetFrom = originXOffset[this.originX]; + } + else { + offsetFrom = this.originX - 0.5; + } + if (typeof to === 'string') { + offsetTo = originXOffset[to]; + } + else { + offsetTo = to - 0.5; + } + this.left += xFull * (offsetTo - offsetFrom); + this.top += yFull * (offsetTo - offsetFrom); + this.setCoords(); + this.originX = to; + }, + + /** + * Sets the origin/position of the object to it's center point + * @private + * @return {void} + */ + _setOriginToCenter: function() { + this._originalOriginX = this.originX; + this._originalOriginY = this.originY; + + var center = this.getCenterPoint(); + + this.originX = 'center'; + this.originY = 'center'; + + this.left = center.x; + this.top = center.y; + }, + + /** + * Resets the origin/position of the object to it's original origin + * @private + * @return {void} + */ + _resetOrigin: function() { + var originPoint = this.translateToOriginPoint( + this.getCenterPoint(), + this._originalOriginX, + this._originalOriginY); + + this.originX = this._originalOriginX; + this.originY = this._originalOriginY; + + this.left = originPoint.x; + this.top = originPoint.y; + + this._originalOriginX = null; + this._originalOriginY = null; + }, + + /** + * @private + */ + _getLeftTopCoords: function() { + return this.translateToOriginPoint(this.getCenterPoint(), 'left', 'top'); + } + }); + +})(); + + +(function() { + + function getCoords(oCoords) { + return [ + new fabric.Point(oCoords.tl.x, oCoords.tl.y), + new fabric.Point(oCoords.tr.x, oCoords.tr.y), + new fabric.Point(oCoords.br.x, oCoords.br.y), + new fabric.Point(oCoords.bl.x, oCoords.bl.y) + ]; + } + + var degreesToRadians = fabric.util.degreesToRadians, + multiplyMatrices = fabric.util.multiplyTransformMatrices; + + fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ { + + /** + * Object containing coordinates of object's controls + * @type Object + * @default + */ + oCoords: null, + + /** + * Checks if object intersects with an area formed by 2 points + * @param {Object} pointTL top-left point of area + * @param {Object} pointBR bottom-right point of area + * @return {Boolean} true if object intersects with an area formed by 2 points + */ + intersectsWithRect: function(pointTL, pointBR) { + var oCoords = getCoords(this.oCoords), + intersection = fabric.Intersection.intersectPolygonRectangle( + oCoords, + pointTL, + pointBR + ); + return intersection.status === 'Intersection'; + }, + + /** + * Checks if object intersects with another object + * @param {Object} other Object to test + * @return {Boolean} true if object intersects with another object + */ + intersectsWithObject: function(other) { + var intersection = fabric.Intersection.intersectPolygonPolygon( + getCoords(this.oCoords), + getCoords(other.oCoords) + ); + + return intersection.status === 'Intersection' + || other.isContainedWithinObject(this) + || this.isContainedWithinObject(other); + }, + + /** + * Checks if object is fully contained within area of another object + * @param {Object} other Object to test + * @return {Boolean} true if object is fully contained within area of another object + */ + isContainedWithinObject: function(other) { + var points = getCoords(this.oCoords), + i = 0; + for (; i < 4; i++) { + if (!other.containsPoint(points[i])) { + return false; + } + } + return true; + }, + + /** + * Checks if object is fully contained within area formed by 2 points + * @param {Object} pointTL top-left point of area + * @param {Object} pointBR bottom-right point of area + * @return {Boolean} true if object is fully contained within area formed by 2 points + */ + isContainedWithinRect: function(pointTL, pointBR) { + var boundingRect = this.getBoundingRect(); + + return ( + boundingRect.left >= pointTL.x && + boundingRect.left + boundingRect.width <= pointBR.x && + boundingRect.top >= pointTL.y && + boundingRect.top + boundingRect.height <= pointBR.y + ); + }, + + /** + * Checks if point is inside the object + * @param {fabric.Point} point Point to check against + * @return {Boolean} true if point is inside the object + */ + containsPoint: function(point) { + if (!this.oCoords) { + this.setCoords(); + } + var lines = this._getImageLines(this.oCoords), + xPoints = this._findCrossPoints(point, lines); + + // if xPoints is odd then point is inside the object + return (xPoints !== 0 && xPoints % 2 === 1); + }, + + /** + * Method that returns an object with the object edges in it, given the coordinates of the corners + * @private + * @param {Object} oCoords Coordinates of the object corners + */ + _getImageLines: function(oCoords) { + return { + topline: { + o: oCoords.tl, + d: oCoords.tr + }, + rightline: { + o: oCoords.tr, + d: oCoords.br + }, + bottomline: { + o: oCoords.br, + d: oCoords.bl + }, + leftline: { + o: oCoords.bl, + d: oCoords.tl + } + }; + }, + + /** + * Helper method to determine how many cross points are between the 4 object edges + * and the horizontal line determined by a point on canvas + * @private + * @param {fabric.Point} point Point to check + * @param {Object} oCoords Coordinates of the object being evaluated + */ + // remove yi, not used but left code here just in case. + _findCrossPoints: function(point, oCoords) { + var b1, b2, a1, a2, xi, // yi, + xcount = 0, + iLine; + + for (var lineKey in oCoords) { + iLine = oCoords[lineKey]; + // optimisation 1: line below point. no cross + if ((iLine.o.y < point.y) && (iLine.d.y < point.y)) { + continue; + } + // optimisation 2: line above point. no cross + if ((iLine.o.y >= point.y) && (iLine.d.y >= point.y)) { + continue; + } + // optimisation 3: vertical line case + if ((iLine.o.x === iLine.d.x) && (iLine.o.x >= point.x)) { + xi = iLine.o.x; + // yi = point.y; + } + // calculate the intersection point + else { + b1 = 0; + b2 = (iLine.d.y - iLine.o.y) / (iLine.d.x - iLine.o.x); + a1 = point.y - b1 * point.x; + a2 = iLine.o.y - b2 * iLine.o.x; + + xi = -(a1 - a2) / (b1 - b2); + // yi = a1 + b1 * xi; + } + // dont count xi < point.x cases + if (xi >= point.x) { + xcount += 1; + } + // optimisation 4: specific for square images + if (xcount === 2) { + break; + } + } + return xcount; + }, + + /** + * Returns width of an object's bounding rectangle + * @deprecated since 1.0.4 + * @return {Number} width value + */ + getBoundingRectWidth: function() { + return this.getBoundingRect().width; + }, + + /** + * Returns height of an object's bounding rectangle + * @deprecated since 1.0.4 + * @return {Number} height value + */ + getBoundingRectHeight: function() { + return this.getBoundingRect().height; + }, + + /** + * Returns coordinates of object's bounding rectangle (left, top, width, height) + * @return {Object} Object with left, top, width, height properties + */ + getBoundingRect: function() { + this.oCoords || this.setCoords(); + return fabric.util.makeBoundingBoxFromPoints([ + this.oCoords.tl, + this.oCoords.tr, + this.oCoords.br, + this.oCoords.bl + ]); + }, + + /** + * Returns width of an object bounding box counting transformations + * @return {Number} width value + */ + getWidth: function() { + return this._getTransformedDimensions().x; + }, + + /** + * Returns height of an object bounding box counting transformations + * to be renamed in 2.0 + * @return {Number} height value + */ + getHeight: function() { + return this._getTransformedDimensions().y; + }, + + /** + * Makes sure the scale is valid and modifies it if necessary + * @private + * @param {Number} value + * @return {Number} + */ + _constrainScale: function(value) { + if (Math.abs(value) < this.minScaleLimit) { + if (value < 0) { + return -this.minScaleLimit; + } + else { + return this.minScaleLimit; + } + } + return value; + }, + + /** + * Scales an object (equally by x and y) + * @param {Number} value Scale factor + * @return {fabric.Object} thisArg + * @chainable + */ + scale: function(value) { + value = this._constrainScale(value); + + if (value < 0) { + this.flipX = !this.flipX; + this.flipY = !this.flipY; + value *= -1; + } + + this.scaleX = value; + this.scaleY = value; + this.setCoords(); + return this; + }, + + /** + * Scales an object to a given width, with respect to bounding box (scaling by x/y equally) + * @param {Number} value New width value + * @return {fabric.Object} thisArg + * @chainable + */ + scaleToWidth: function(value) { + // adjust to bounding rect factor so that rotated shapes would fit as well + var boundingRectFactor = this.getBoundingRect().width / this.getWidth(); + return this.scale(value / this.width / boundingRectFactor); + }, + + /** + * Scales an object to a given height, with respect to bounding box (scaling by x/y equally) + * @param {Number} value New height value + * @return {fabric.Object} thisArg + * @chainable + */ + scaleToHeight: function(value) { + // adjust to bounding rect factor so that rotated shapes would fit as well + var boundingRectFactor = this.getBoundingRect().height / this.getHeight(); + return this.scale(value / this.height / boundingRectFactor); + }, + + /** + * Sets corner position coordinates based on current angle, width and height + * See https://github.com/kangax/fabric.js/wiki/When-to-call-setCoords + * @return {fabric.Object} thisArg + * @chainable + */ + setCoords: function() { + var theta = degreesToRadians(this.angle), + vpt = this.getViewportTransform(), + dim = this._calculateCurrentDimensions(), + currentWidth = dim.x, currentHeight = dim.y; + + // If width is negative, make postive. Fixes path selection issue + if (currentWidth < 0) { + currentWidth = Math.abs(currentWidth); + } + + var sinTh = Math.sin(theta), + cosTh = Math.cos(theta), + _angle = currentWidth > 0 ? Math.atan(currentHeight / currentWidth) : 0, + _hypotenuse = (currentWidth / Math.cos(_angle)) / 2, + offsetX = Math.cos(_angle + theta) * _hypotenuse, + offsetY = Math.sin(_angle + theta) * _hypotenuse, + + // offset added for rotate and scale actions + coords = fabric.util.transformPoint(this.getCenterPoint(), vpt), + tl = new fabric.Point(coords.x - offsetX, coords.y - offsetY), + tr = new fabric.Point(tl.x + (currentWidth * cosTh), tl.y + (currentWidth * sinTh)), + bl = new fabric.Point(tl.x - (currentHeight * sinTh), tl.y + (currentHeight * cosTh)), + br = new fabric.Point(coords.x + offsetX, coords.y + offsetY), + ml = new fabric.Point((tl.x + bl.x) / 2, (tl.y + bl.y) / 2), + mt = new fabric.Point((tr.x + tl.x) / 2, (tr.y + tl.y) / 2), + mr = new fabric.Point((br.x + tr.x) / 2, (br.y + tr.y) / 2), + mb = new fabric.Point((br.x + bl.x) / 2, (br.y + bl.y) / 2), + mtr = new fabric.Point(mt.x + sinTh * this.rotatingPointOffset, mt.y - cosTh * this.rotatingPointOffset); + // debugging + + /* setTimeout(function() { + canvas.contextTop.fillStyle = 'green'; + canvas.contextTop.fillRect(mb.x, mb.y, 3, 3); + canvas.contextTop.fillRect(bl.x, bl.y, 3, 3); + canvas.contextTop.fillRect(br.x, br.y, 3, 3); + canvas.contextTop.fillRect(tl.x, tl.y, 3, 3); + canvas.contextTop.fillRect(tr.x, tr.y, 3, 3); + canvas.contextTop.fillRect(ml.x, ml.y, 3, 3); + canvas.contextTop.fillRect(mr.x, mr.y, 3, 3); + canvas.contextTop.fillRect(mt.x, mt.y, 3, 3); + canvas.contextTop.fillRect(mtr.x, mtr.y, 3, 3); + }, 50); */ + + this.oCoords = { + // corners + tl: tl, tr: tr, br: br, bl: bl, + // middle + ml: ml, mt: mt, mr: mr, mb: mb, + // rotating point + mtr: mtr + }; + + // set coordinates of the draggable boxes in the corners used to scale/rotate the image + this._setCornerCoords && this._setCornerCoords(); + + return this; + }, + + /* + * calculate rotation matrix of an object + * @return {Array} rotation matrix for the object + */ + _calcRotateMatrix: function() { + if (this.angle) { + var theta = degreesToRadians(this.angle), cos = Math.cos(theta), sin = Math.sin(theta); + return [cos, sin, -sin, cos, 0, 0]; + } + return [1, 0, 0, 1, 0, 0]; + }, + + /* + * calculate trasform Matrix that represent current transformation from + * object properties. + * @return {Array} matrix Transform Matrix for the object + */ + calcTransformMatrix: function() { + var center = this.getCenterPoint(), + translateMatrix = [1, 0, 0, 1, center.x, center.y], + rotateMatrix = this._calcRotateMatrix(), + dimensionMatrix = this._calcDimensionsTransformMatrix(this.skewX, this.skewY, true), + matrix = this.group ? this.group.calcTransformMatrix() : [1, 0, 0, 1, 0, 0]; + matrix = multiplyMatrices(matrix, translateMatrix); + matrix = multiplyMatrices(matrix, rotateMatrix); + matrix = multiplyMatrices(matrix, dimensionMatrix); + return matrix; + }, + + _calcDimensionsTransformMatrix: function(skewX, skewY, flipping) { + var skewMatrixX = [1, 0, Math.tan(degreesToRadians(skewX)), 1], + skewMatrixY = [1, Math.tan(degreesToRadians(skewY)), 0, 1], + scaleX = this.scaleX * (flipping && this.flipX ? -1 : 1), + scaleY = this.scaleY * (flipping && this.flipY ? -1 : 1), + scaleMatrix = [scaleX, 0, 0, scaleY], + m = multiplyMatrices(scaleMatrix, skewMatrixX, true); + return multiplyMatrices(m, skewMatrixY, true); + } + }); +})(); + + +fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ { + + /** + * Moves an object to the bottom of the stack of drawn objects + * @return {fabric.Object} thisArg + * @chainable + */ + sendToBack: function() { + if (this.group) { + fabric.StaticCanvas.prototype.sendToBack.call(this.group, this); + } + else { + this.canvas.sendToBack(this); + } + return this; + }, + + /** + * Moves an object to the top of the stack of drawn objects + * @return {fabric.Object} thisArg + * @chainable + */ + bringToFront: function() { + if (this.group) { + fabric.StaticCanvas.prototype.bringToFront.call(this.group, this); + } + else { + this.canvas.bringToFront(this); + } + return this; + }, + + /** + * Moves an object down in stack of drawn objects + * @param {Boolean} [intersecting] If `true`, send object behind next lower intersecting object + * @return {fabric.Object} thisArg + * @chainable + */ + sendBackwards: function(intersecting) { + if (this.group) { + fabric.StaticCanvas.prototype.sendBackwards.call(this.group, this, intersecting); + } + else { + this.canvas.sendBackwards(this, intersecting); + } + return this; + }, + + /** + * Moves an object up in stack of drawn objects + * @param {Boolean} [intersecting] If `true`, send object in front of next upper intersecting object + * @return {fabric.Object} thisArg + * @chainable + */ + bringForward: function(intersecting) { + if (this.group) { + fabric.StaticCanvas.prototype.bringForward.call(this.group, this, intersecting); + } + else { + this.canvas.bringForward(this, intersecting); + } + return this; + }, + + /** + * Moves an object to specified level in stack of drawn objects + * @param {Number} index New position of object + * @return {fabric.Object} thisArg + * @chainable + */ + moveTo: function(index) { + if (this.group) { + fabric.StaticCanvas.prototype.moveTo.call(this.group, this, index); + } + else { + this.canvas.moveTo(this, index); + } + return this; + } +}); + + +/* _TO_SVG_START_ */ +(function() { + + function getSvgColorString(prop, value) { + if (!value) { + return prop + ': none; '; + } + else if (value.toLive) { + return prop + ': url(#SVGID_' + value.id + '); '; + } + else { + var color = new fabric.Color(value), + str = prop + ': ' + color.toRgb() + '; ', + opacity = color.getAlpha(); + if (opacity !== 1) { + //change the color in rgb + opacity + str += prop + '-opacity: ' + opacity.toString() + '; '; + } + return str; + } + } + + fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ { + /** + * Returns styles-string for svg-export + * @param {Boolean} skipShadow a boolean to skip shadow filter output + * @return {String} + */ + getSvgStyles: function(skipShadow) { + + var fillRule = this.fillRule, + strokeWidth = this.strokeWidth ? this.strokeWidth : '0', + strokeDashArray = this.strokeDashArray ? this.strokeDashArray.join(' ') : 'none', + strokeLineCap = this.strokeLineCap ? this.strokeLineCap : 'butt', + strokeLineJoin = this.strokeLineJoin ? this.strokeLineJoin : 'miter', + strokeMiterLimit = this.strokeMiterLimit ? this.strokeMiterLimit : '4', + opacity = typeof this.opacity !== 'undefined' ? this.opacity : '1', + visibility = this.visible ? '' : ' visibility: hidden;', + filter = skipShadow ? '' : this.getSvgFilter(), + fill = getSvgColorString('fill', this.fill), + stroke = getSvgColorString('stroke', this.stroke); + + return [ + stroke, + 'stroke-width: ', strokeWidth, '; ', + 'stroke-dasharray: ', strokeDashArray, '; ', + 'stroke-linecap: ', strokeLineCap, '; ', + 'stroke-linejoin: ', strokeLineJoin, '; ', + 'stroke-miterlimit: ', strokeMiterLimit, '; ', + fill, + 'fill-rule: ', fillRule, '; ', + 'opacity: ', opacity, ';', + filter, + visibility + ].join(''); + }, + + /** + * Returns filter for svg shadow + * @return {String} + */ + getSvgFilter: function() { + return this.shadow ? 'filter: url(#SVGID_' + this.shadow.id + ');' : ''; + }, + + /** + * Returns id attribute for svg output + * @return {String} + */ + getSvgId: function() { + return this.id ? 'id="' + this.id + '" ' : ''; + }, + + /** + * Returns transform-string for svg-export + * @return {String} + */ + getSvgTransform: function() { + if (this.group && this.group.type === 'path-group') { + return ''; + } + var toFixed = fabric.util.toFixed, + angle = this.getAngle(), + skewX = (this.getSkewX() % 360), + skewY = (this.getSkewY() % 360), + center = this.getCenterPoint(), + + NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS, + + translatePart = this.type === 'path-group' ? '' : 'translate(' + + toFixed(center.x, NUM_FRACTION_DIGITS) + + ' ' + + toFixed(center.y, NUM_FRACTION_DIGITS) + + ')', + + anglePart = angle !== 0 + ? (' rotate(' + toFixed(angle, NUM_FRACTION_DIGITS) + ')') + : '', + + scalePart = (this.scaleX === 1 && this.scaleY === 1) + ? '' : + (' scale(' + + toFixed(this.scaleX, NUM_FRACTION_DIGITS) + + ' ' + + toFixed(this.scaleY, NUM_FRACTION_DIGITS) + + ')'), + + skewXPart = skewX !== 0 ? ' skewX(' + toFixed(skewX, NUM_FRACTION_DIGITS) + ')' : '', + + skewYPart = skewY !== 0 ? ' skewY(' + toFixed(skewY, NUM_FRACTION_DIGITS) + ')' : '', + + addTranslateX = this.type === 'path-group' ? this.width : 0, + + flipXPart = this.flipX ? ' matrix(-1 0 0 1 ' + addTranslateX + ' 0) ' : '', + + addTranslateY = this.type === 'path-group' ? this.height : 0, + + flipYPart = this.flipY ? ' matrix(1 0 0 -1 0 ' + addTranslateY + ')' : ''; + + return [ + translatePart, anglePart, scalePart, flipXPart, flipYPart, skewXPart, skewYPart + ].join(''); + }, + + /** + * Returns transform-string for svg-export from the transform matrix of single elements + * @return {String} + */ + getSvgTransformMatrix: function() { + return this.transformMatrix ? ' matrix(' + this.transformMatrix.join(' ') + ') ' : ''; + }, + + /** + * @private + */ + _createBaseSVGMarkup: function() { + var markup = []; + + if (this.fill && this.fill.toLive) { + markup.push(this.fill.toSVG(this, false)); + } + if (this.stroke && this.stroke.toLive) { + markup.push(this.stroke.toSVG(this, false)); + } + if (this.shadow) { + markup.push(this.shadow.toSVG(this)); + } + return markup; + } + }); +})(); +/* _TO_SVG_END_ */ + + +(function() { + + var extend = fabric.util.object.extend; + + /* + Depends on `stateProperties` + */ + function saveProps(origin, destination, props) { + var tmpObj = { }, deep = true; + props.forEach(function(prop) { + tmpObj[prop] = origin[prop]; + }); + extend(origin[destination], tmpObj, deep); + } + + function _isEqual(origValue, currentValue) { + if (!fabric.isLikelyNode && origValue instanceof Element) { + // avoid checking deep html elements + return origValue === currentValue; + } + else if (origValue instanceof Array) { + if (origValue.length !== currentValue.length) { + return false + } + var _currentValue = currentValue.concat().sort(), + _origValue = origValue.concat().sort(); + return !_origValue.some(function(v, i) { + return !_isEqual(_currentValue[i], v); + }); + } + else if (origValue instanceof Object) { + for (var key in origValue) { + if (!_isEqual(origValue[key], currentValue[key])) { + return false; + } + } + return true; + } + else { + return origValue === currentValue; + } + } + + + fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ { + + /** + * Returns true if object state (one of its state properties) was changed + * @return {Boolean} true if instance' state has changed since `{@link fabric.Object#saveState}` was called + */ + hasStateChanged: function() { + return !_isEqual(this.originalState, this); + }, + + /** + * Saves state of an object + * @param {Object} [options] Object with additional `stateProperties` array to include when saving state + * @return {fabric.Object} thisArg + */ + saveState: function(options) { + saveProps(this, 'originalState', this.stateProperties); + if (options && options.stateProperties) { + saveProps(this, 'originalState', options.stateProperties); + } + return this; + }, + + /** + * Setups state of an object + * @param {Object} [options] Object with additional `stateProperties` array to include when saving state + * @return {fabric.Object} thisArg + */ + setupState: function(options) { + this.originalState = { }; + this.saveState(options); + return this; + } + }); +})(); + + +(function() { + + var degreesToRadians = fabric.util.degreesToRadians, + /* eslint-disable camelcase */ + isVML = function() { return typeof G_vmlCanvasManager !== 'undefined'; }; + /* eslint-enable camelcase */ + fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ { + + /** + * The object interactivity controls. + * @private + */ + _controlsVisibility: null, + + /** + * Determines which corner has been clicked + * @private + * @param {Object} pointer The pointer indicating the mouse position + * @return {String|Boolean} corner code (tl, tr, bl, br, etc.), or false if nothing is found + */ + _findTargetCorner: function(pointer) { + if (!this.hasControls || !this.active) { + return false; + } + + var ex = pointer.x, + ey = pointer.y, + xPoints, + lines; + this.__corner = 0; + for (var i in this.oCoords) { + + if (!this.isControlVisible(i)) { + continue; + } + + if (i === 'mtr' && !this.hasRotatingPoint) { + continue; + } + + if (this.get('lockUniScaling') && + (i === 'mt' || i === 'mr' || i === 'mb' || i === 'ml')) { + continue; + } + + lines = this._getImageLines(this.oCoords[i].corner); + + // debugging + + // canvas.contextTop.fillRect(lines.bottomline.d.x, lines.bottomline.d.y, 2, 2); + // canvas.contextTop.fillRect(lines.bottomline.o.x, lines.bottomline.o.y, 2, 2); + + // canvas.contextTop.fillRect(lines.leftline.d.x, lines.leftline.d.y, 2, 2); + // canvas.contextTop.fillRect(lines.leftline.o.x, lines.leftline.o.y, 2, 2); + + // canvas.contextTop.fillRect(lines.topline.d.x, lines.topline.d.y, 2, 2); + // canvas.contextTop.fillRect(lines.topline.o.x, lines.topline.o.y, 2, 2); + + // canvas.contextTop.fillRect(lines.rightline.d.x, lines.rightline.d.y, 2, 2); + // canvas.contextTop.fillRect(lines.rightline.o.x, lines.rightline.o.y, 2, 2); + + xPoints = this._findCrossPoints({ x: ex, y: ey }, lines); + if (xPoints !== 0 && xPoints % 2 === 1) { + this.__corner = i; + return i; + } + } + return false; + }, + + /** + * Sets the coordinates of the draggable boxes in the corners of + * the image used to scale/rotate it. + * @private + */ + _setCornerCoords: function() { + var coords = this.oCoords, + newTheta = degreesToRadians(45 - this.angle), + /* Math.sqrt(2 * Math.pow(this.cornerSize, 2)) / 2, */ + /* 0.707106 stands for sqrt(2)/2 */ + cornerHypotenuse = this.cornerSize * 0.707106, + cosHalfOffset = cornerHypotenuse * Math.cos(newTheta), + sinHalfOffset = cornerHypotenuse * Math.sin(newTheta), + x, y; + + for (var point in coords) { + x = coords[point].x; + y = coords[point].y; + coords[point].corner = { + tl: { + x: x - sinHalfOffset, + y: y - cosHalfOffset + }, + tr: { + x: x + cosHalfOffset, + y: y - sinHalfOffset + }, + bl: { + x: x - cosHalfOffset, + y: y + sinHalfOffset + }, + br: { + x: x + sinHalfOffset, + y: y + cosHalfOffset + } + }; + } + }, + + /* + * Calculate object dimensions from its properties + * @private + */ + _getNonTransformedDimensions: function() { + var strokeWidth = this.strokeWidth, + w = this.width, + h = this.height, + addStrokeToW = true, + addStrokeToH = true; + + if (this.type === 'line' && this.strokeLineCap === 'butt') { + addStrokeToH = w; + addStrokeToW = h; + } + + if (addStrokeToH) { + h += h < 0 ? -strokeWidth : strokeWidth; + } + + if (addStrokeToW) { + w += w < 0 ? -strokeWidth : strokeWidth; + } + + return { x: w, y: h }; + }, + + /* + * @private + */ + _getTransformedDimensions: function(skewX, skewY) { + if (typeof skewX === 'undefined') { + skewX = this.skewX; + } + if (typeof skewY === 'undefined') { + skewY = this.skewY; + } + var dimensions = this._getNonTransformedDimensions(), + dimX = dimensions.x / 2, dimY = dimensions.y / 2, + points = [ + { + x: -dimX, + y: -dimY + }, + { + x: dimX, + y: -dimY + }, + { + x: -dimX, + y: dimY + }, + { + x: dimX, + y: dimY + }], + i, transformMatrix = this._calcDimensionsTransformMatrix(skewX, skewY, false), + bbox; + for (i = 0; i < points.length; i++) { + points[i] = fabric.util.transformPoint(points[i], transformMatrix); + } + bbox = fabric.util.makeBoundingBoxFromPoints(points); + return { x: bbox.width, y: bbox.height }; + }, + + /* + * private + */ + _calculateCurrentDimensions: function() { + var vpt = this.getViewportTransform(), + dim = this._getTransformedDimensions(), + w = dim.x, h = dim.y, + p = fabric.util.transformPoint(new fabric.Point(w, h), vpt, true); + + return p.scalarAdd(2 * this.padding); + }, + + /** + * Draws a colored layer behind the object, inside its selection borders. + * Requires public options: padding, selectionBackgroundColor + * this function is called when the context is transformed + * @param {CanvasRenderingContext2D} ctx Context to draw on + * @return {fabric.Object} thisArg + * @chainable + */ + drawSelectionBackground: function(ctx) { + if (!this.selectionBackgroundColor || this.group || !this.active) { + return this; + } + ctx.save(); + var center = this.getCenterPoint(), wh = this._calculateCurrentDimensions(), + vpt = this.canvas.viewportTransform; + ctx.translate(center.x, center.y); + ctx.scale(1 / vpt[0], 1 / vpt[3]); + ctx.rotate(degreesToRadians(this.angle)); + ctx.fillStyle = this.selectionBackgroundColor; + ctx.fillRect(-wh.x / 2, -wh.y / 2, wh.x, wh.y); + ctx.restore(); + return this; + }, + + /** + * Draws borders of an object's bounding box. + * Requires public properties: width, height + * Requires public options: padding, borderColor + * @param {CanvasRenderingContext2D} ctx Context to draw on + * @return {fabric.Object} thisArg + * @chainable + */ + drawBorders: function(ctx) { + if (!this.hasBorders) { + return this; + } + + var wh = this._calculateCurrentDimensions(), + strokeWidth = 1 / this.borderScaleFactor, + width = wh.x + strokeWidth, + height = wh.y + strokeWidth; + + ctx.save(); + ctx.strokeStyle = this.borderColor; + this._setLineDash(ctx, this.borderDashArray, null); + + ctx.strokeRect( + -width / 2, + -height / 2, + width, + height + ); + + if (this.hasRotatingPoint && this.isControlVisible('mtr') && !this.get('lockRotation') && this.hasControls) { + + var rotateHeight = -height / 2; + + ctx.beginPath(); + ctx.moveTo(0, rotateHeight); + ctx.lineTo(0, rotateHeight - this.rotatingPointOffset); + ctx.closePath(); + ctx.stroke(); + } + + ctx.restore(); + return this; + }, + + /** + * Draws borders of an object's bounding box when it is inside a group. + * Requires public properties: width, height + * Requires public options: padding, borderColor + * @param {CanvasRenderingContext2D} ctx Context to draw on + * @param {object} options object representing current object parameters + * @return {fabric.Object} thisArg + * @chainable + */ + drawBordersInGroup: function(ctx, options) { + if (!this.hasBorders) { + return this; + } + + var p = this._getNonTransformedDimensions(), + matrix = fabric.util.customTransformMatrix(options.scaleX, options.scaleY, options.skewX), + wh = fabric.util.transformPoint(p, matrix), + strokeWidth = 1 / this.borderScaleFactor, + width = wh.x + strokeWidth + 2 * this.padding, + height = wh.y + strokeWidth + 2 * this.padding; + + ctx.save(); + this._setLineDash(ctx, this.borderDashArray, null); + ctx.strokeStyle = this.borderColor; + + ctx.strokeRect( + -width / 2, + -height / 2, + width, + height + ); + + ctx.restore(); + return this; + }, + + /** + * Draws corners of an object's bounding box. + * Requires public properties: width, height + * Requires public options: cornerSize, padding + * @param {CanvasRenderingContext2D} ctx Context to draw on + * @return {fabric.Object} thisArg + * @chainable + */ + drawControls: function(ctx) { + if (!this.hasControls) { + return this; + } + + var wh = this._calculateCurrentDimensions(), + width = wh.x, + height = wh.y, + scaleOffset = this.cornerSize, + left = -(width + scaleOffset) / 2, + top = -(height + scaleOffset) / 2, + methodName = this.transparentCorners ? 'stroke' : 'fill'; + + ctx.save(); + ctx.strokeStyle = ctx.fillStyle = this.cornerColor; + if (!this.transparentCorners) { + ctx.strokeStyle = this.cornerStrokeColor; + } + this._setLineDash(ctx, this.cornerDashArray, null); + + // top-left + this._drawControl('tl', ctx, methodName, + left, + top); + + // top-right + this._drawControl('tr', ctx, methodName, + left + width, + top); + + // bottom-left + this._drawControl('bl', ctx, methodName, + left, + top + height); + + // bottom-right + this._drawControl('br', ctx, methodName, + left + width, + top + height); + + if (!this.get('lockUniScaling')) { + + // middle-top + this._drawControl('mt', ctx, methodName, + left + width / 2, + top); + + // middle-bottom + this._drawControl('mb', ctx, methodName, + left + width / 2, + top + height); + + // middle-right + this._drawControl('mr', ctx, methodName, + left + width, + top + height / 2); + + // middle-left + this._drawControl('ml', ctx, methodName, + left, + top + height / 2); + } + + // middle-top-rotate + if (this.hasRotatingPoint) { + this._drawControl('mtr', ctx, methodName, + left + width / 2, + top - this.rotatingPointOffset); + } + + ctx.restore(); + + return this; + }, + + /** + * @private + */ + _drawControl: function(control, ctx, methodName, left, top) { + if (!this.isControlVisible(control)) { + return; + } + var size = this.cornerSize, stroke = !this.transparentCorners && this.cornerStrokeColor; + switch (this.cornerStyle) { + case 'circle': + ctx.beginPath(); + ctx.arc(left + size / 2, top + size / 2, size / 2, 0, 2 * Math.PI, false); + ctx[methodName](); + if (stroke) { + ctx.stroke(); + } + break; + default: + isVML() || this.transparentCorners || ctx.clearRect(left, top, size, size); + ctx[methodName + 'Rect'](left, top, size, size); + if (stroke) { + ctx.strokeRect(left, top, size, size); + } + } + }, + + /** + * Returns true if the specified control is visible, false otherwise. + * @param {String} controlName The name of the control. Possible values are 'tl', 'tr', 'br', 'bl', 'ml', 'mt', 'mr', 'mb', 'mtr'. + * @returns {Boolean} true if the specified control is visible, false otherwise + */ + isControlVisible: function(controlName) { + return this._getControlsVisibility()[controlName]; + }, + + /** + * Sets the visibility of the specified control. + * @param {String} controlName The name of the control. Possible values are 'tl', 'tr', 'br', 'bl', 'ml', 'mt', 'mr', 'mb', 'mtr'. + * @param {Boolean} visible true to set the specified control visible, false otherwise + * @return {fabric.Object} thisArg + * @chainable + */ + setControlVisible: function(controlName, visible) { + this._getControlsVisibility()[controlName] = visible; + return this; + }, + + /** + * Sets the visibility state of object controls. + * @param {Object} [options] Options object + * @param {Boolean} [options.bl] true to enable the bottom-left control, false to disable it + * @param {Boolean} [options.br] true to enable the bottom-right control, false to disable it + * @param {Boolean} [options.mb] true to enable the middle-bottom control, false to disable it + * @param {Boolean} [options.ml] true to enable the middle-left control, false to disable it + * @param {Boolean} [options.mr] true to enable the middle-right control, false to disable it + * @param {Boolean} [options.mt] true to enable the middle-top control, false to disable it + * @param {Boolean} [options.tl] true to enable the top-left control, false to disable it + * @param {Boolean} [options.tr] true to enable the top-right control, false to disable it + * @param {Boolean} [options.mtr] true to enable the middle-top-rotate control, false to disable it + * @return {fabric.Object} thisArg + * @chainable + */ + setControlsVisibility: function(options) { + options || (options = { }); + + for (var p in options) { + this.setControlVisible(p, options[p]); + } + return this; + }, + + /** + * Returns the instance of the control visibility set for this object. + * @private + * @returns {Object} + */ + _getControlsVisibility: function() { + if (!this._controlsVisibility) { + this._controlsVisibility = { + tl: true, + tr: true, + br: true, + bl: true, + ml: true, + mt: true, + mr: true, + mb: true, + mtr: true + }; + } + return this._controlsVisibility; + } + }); +})(); + + +fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ { + + /** + * Animation duration (in ms) for fx* methods + * @type Number + * @default + */ + FX_DURATION: 500, + + /** + * Centers object horizontally with animation. + * @param {fabric.Object} object Object to center + * @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties + * @param {Function} [callbacks.onComplete] Invoked on completion + * @param {Function} [callbacks.onChange] Invoked on every step of animation + * @return {fabric.Canvas} thisArg + * @chainable + */ + fxCenterObjectH: function (object, callbacks) { + callbacks = callbacks || { }; + + var empty = function() { }, + onComplete = callbacks.onComplete || empty, + onChange = callbacks.onChange || empty, + _this = this; + + fabric.util.animate({ + startValue: object.get('left'), + endValue: this.getCenter().left, + duration: this.FX_DURATION, + onChange: function(value) { + object.set('left', value); + _this.renderAll(); + onChange(); + }, + onComplete: function() { + object.setCoords(); + onComplete(); + } + }); + + return this; + }, + + /** + * Centers object vertically with animation. + * @param {fabric.Object} object Object to center + * @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties + * @param {Function} [callbacks.onComplete] Invoked on completion + * @param {Function} [callbacks.onChange] Invoked on every step of animation + * @return {fabric.Canvas} thisArg + * @chainable + */ + fxCenterObjectV: function (object, callbacks) { + callbacks = callbacks || { }; + + var empty = function() { }, + onComplete = callbacks.onComplete || empty, + onChange = callbacks.onChange || empty, + _this = this; + + fabric.util.animate({ + startValue: object.get('top'), + endValue: this.getCenter().top, + duration: this.FX_DURATION, + onChange: function(value) { + object.set('top', value); + _this.renderAll(); + onChange(); + }, + onComplete: function() { + object.setCoords(); + onComplete(); + } + }); + + return this; + }, + + /** + * Same as `fabric.Canvas#remove` but animated + * @param {fabric.Object} object Object to remove + * @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties + * @param {Function} [callbacks.onComplete] Invoked on completion + * @param {Function} [callbacks.onChange] Invoked on every step of animation + * @return {fabric.Canvas} thisArg + * @chainable + */ + fxRemove: function (object, callbacks) { + callbacks = callbacks || { }; + + var empty = function() { }, + onComplete = callbacks.onComplete || empty, + onChange = callbacks.onChange || empty, + _this = this; + + fabric.util.animate({ + startValue: object.get('opacity'), + endValue: 0, + duration: this.FX_DURATION, + onStart: function() { + object.set('active', false); + }, + onChange: function(value) { + object.set('opacity', value); + _this.renderAll(); + onChange(); + }, + onComplete: function () { + _this.remove(object); + onComplete(); + } + }); + + return this; + } +}); + +fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ { + /** + * Animates object's properties + * @param {String|Object} property Property to animate (if string) or properties to animate (if object) + * @param {Number|Object} value Value to animate property to (if string was given first) or options object + * @return {fabric.Object} thisArg + * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#animation} + * @chainable + * + * As object — multiple properties + * + * object.animate({ left: ..., top: ... }); + * object.animate({ left: ..., top: ... }, { duration: ... }); + * + * As string — one property + * + * object.animate('left', ...); + * object.animate('left', { duration: ... }); + * + */ + animate: function() { + if (arguments[0] && typeof arguments[0] === 'object') { + var propsToAnimate = [], prop, skipCallbacks; + for (prop in arguments[0]) { + propsToAnimate.push(prop); + } + for (var i = 0, len = propsToAnimate.length; i < len; i++) { + prop = propsToAnimate[i]; + skipCallbacks = i !== len - 1; + this._animate(prop, arguments[0][prop], arguments[1], skipCallbacks); + } + } + else { + this._animate.apply(this, arguments); + } + return this; + }, + + /** + * @private + * @param {String} property Property to animate + * @param {String} to Value to animate to + * @param {Object} [options] Options object + * @param {Boolean} [skipCallbacks] When true, callbacks like onchange and oncomplete are not invoked + */ + _animate: function(property, to, options, skipCallbacks) { + var _this = this, propPair; + + to = to.toString(); + + if (!options) { + options = { }; + } + else { + options = fabric.util.object.clone(options); + } + + if (~property.indexOf('.')) { + propPair = property.split('.'); + } + + var currentValue = propPair + ? this.get(propPair[0])[propPair[1]] + : this.get(property); + + if (!('from' in options)) { + options.from = currentValue; + } + + if (~to.indexOf('=')) { + to = currentValue + parseFloat(to.replace('=', '')); + } + else { + to = parseFloat(to); + } + + fabric.util.animate({ + startValue: options.from, + endValue: to, + byValue: options.by, + easing: options.easing, + duration: options.duration, + abort: options.abort && function() { + return options.abort.call(_this); + }, + onChange: function(value) { + if (propPair) { + _this[propPair[0]][propPair[1]] = value; + } + else { + _this.set(property, value); + } + if (skipCallbacks) { + return; + } + options.onChange && options.onChange(); + }, + onComplete: function() { + if (skipCallbacks) { + return; + } + + _this.setCoords(); + options.onComplete && options.onComplete(); + } + }); + } +}); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + coordProps = { x1: 1, x2: 1, y1: 1, y2: 1 }, + supportsLineDash = fabric.StaticCanvas.supports('setLineDash'); + + if (fabric.Line) { + fabric.warn('fabric.Line is already defined'); + return; + } + + /** + * Line class + * @class fabric.Line + * @extends fabric.Object + * @see {@link fabric.Line#initialize} for constructor definition + */ + fabric.Line = fabric.util.createClass(fabric.Object, /** @lends fabric.Line.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'line', + + /** + * x value or first line edge + * @type Number + * @default + */ + x1: 0, + + /** + * y value or first line edge + * @type Number + * @default + */ + y1: 0, + + /** + * x value or second line edge + * @type Number + * @default + */ + x2: 0, + + /** + * y value or second line edge + * @type Number + * @default + */ + y2: 0, + + /** + * Constructor + * @param {Array} [points] Array of points + * @param {Object} [options] Options object + * @return {fabric.Line} thisArg + */ + initialize: function(points, options) { + options = options || { }; + + if (!points) { + points = [0, 0, 0, 0]; + } + + this.callSuper('initialize', options); + + this.set('x1', points[0]); + this.set('y1', points[1]); + this.set('x2', points[2]); + this.set('y2', points[3]); + + this._setWidthHeight(options); + }, + + /** + * @private + * @param {Object} [options] Options + */ + _setWidthHeight: function(options) { + options || (options = { }); + + this.width = Math.abs(this.x2 - this.x1); + this.height = Math.abs(this.y2 - this.y1); + + this.left = 'left' in options + ? options.left + : this._getLeftToOriginX(); + + this.top = 'top' in options + ? options.top + : this._getTopToOriginY(); + }, + + /** + * @private + * @param {String} key + * @param {*} value + */ + _set: function(key, value) { + this.callSuper('_set', key, value); + if (typeof coordProps[key] !== 'undefined') { + this._setWidthHeight(); + } + return this; + }, + + /** + * @private + * @return {Number} leftToOriginX Distance from left edge of canvas to originX of Line. + */ + _getLeftToOriginX: makeEdgeToOriginGetter( + { // property names + origin: 'originX', + axis1: 'x1', + axis2: 'x2', + dimension: 'width' + }, + { // possible values of origin + nearest: 'left', + center: 'center', + farthest: 'right' + } + ), + + /** + * @private + * @return {Number} topToOriginY Distance from top edge of canvas to originY of Line. + */ + _getTopToOriginY: makeEdgeToOriginGetter( + { // property names + origin: 'originY', + axis1: 'y1', + axis2: 'y2', + dimension: 'height' + }, + { // possible values of origin + nearest: 'top', + center: 'center', + farthest: 'bottom' + } + ), + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} noTransform + */ + _render: function(ctx, noTransform) { + ctx.beginPath(); + + if (noTransform) { + // Line coords are distances from left-top of canvas to origin of line. + // To render line in a path-group, we need to translate them to + // distances from center of path-group to center of line. + var cp = this.getCenterPoint(); + ctx.translate( + cp.x - this.strokeWidth / 2, + cp.y - this.strokeWidth / 2 + ); + } + + if (!this.strokeDashArray || this.strokeDashArray && supportsLineDash) { + // move from center (of virtual box) to its left/top corner + // we can't assume x1, y1 is top left and x2, y2 is bottom right + var p = this.calcLinePoints(); + ctx.moveTo(p.x1, p.y1); + ctx.lineTo(p.x2, p.y2); + } + + ctx.lineWidth = this.strokeWidth; + + // TODO: test this + // make sure setting "fill" changes color of a line + // (by copying fillStyle to strokeStyle, since line is stroked, not filled) + var origStrokeStyle = ctx.strokeStyle; + ctx.strokeStyle = this.stroke || ctx.fillStyle; + this.stroke && this._renderStroke(ctx); + ctx.strokeStyle = origStrokeStyle; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderDashedStroke: function(ctx) { + var p = this.calcLinePoints(); + + ctx.beginPath(); + fabric.util.drawDashedLine(ctx, p.x1, p.y1, p.x2, p.y2, this.strokeDashArray); + ctx.closePath(); + }, + + /** + * Returns object representation of an instance + * @methd toObject + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + return extend(this.callSuper('toObject', propertiesToInclude), this.calcLinePoints()); + }, + + /** + * Recalculates line points given width and height + * @private + */ + calcLinePoints: function() { + var xMult = this.x1 <= this.x2 ? -1 : 1, + yMult = this.y1 <= this.y2 ? -1 : 1, + x1 = (xMult * this.width * 0.5), + y1 = (yMult * this.height * 0.5), + x2 = (xMult * this.width * -0.5), + y2 = (yMult * this.height * -0.5); + + return { + x1: x1, + x2: x2, + y1: y1, + y2: y2 + }; + }, + + /* _TO_SVG_START_ */ + /** + * Returns SVG representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var markup = this._createBaseSVGMarkup(), + p = { x1: this.x1, x2: this.x2, y1: this.y1, y2: this.y2 }; + + if (!(this.group && this.group.type === 'path-group')) { + p = this.calcLinePoints(); + } + markup.push( + '\n' + ); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * Returns complexity of an instance + * @return {Number} complexity + */ + complexity: function() { + return 1; + } + }); + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by {@link fabric.Line.fromElement}) + * @static + * @memberOf fabric.Line + * @see http://www.w3.org/TR/SVG/shapes.html#LineElement + */ + fabric.Line.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('x1 y1 x2 y2'.split(' ')); + + /** + * Returns fabric.Line instance from an SVG element + * @static + * @memberOf fabric.Line + * @param {SVGElement} element Element to parse + * @param {Object} [options] Options object + * @return {fabric.Line} instance of fabric.Line + */ + fabric.Line.fromElement = function(element, options) { + var parsedAttributes = fabric.parseAttributes(element, fabric.Line.ATTRIBUTE_NAMES), + points = [ + parsedAttributes.x1 || 0, + parsedAttributes.y1 || 0, + parsedAttributes.x2 || 0, + parsedAttributes.y2 || 0 + ]; + return new fabric.Line(points, extend(parsedAttributes, options)); + }; + /* _FROM_SVG_END_ */ + + /** + * Returns fabric.Line instance from an object representation + * @static + * @memberOf fabric.Line + * @param {Object} object Object to create an instance from + * @param {function} [callback] invoked with new instance as first argument + * @return {fabric.Line} instance of fabric.Line + */ + fabric.Line.fromObject = function(object, callback) { + var points = [object.x1, object.y1, object.x2, object.y2], + line = new fabric.Line(points, object); + callback && callback(line); + return line; + }; + + /** + * Produces a function that calculates distance from canvas edge to Line origin. + */ + function makeEdgeToOriginGetter(propertyNames, originValues) { + var origin = propertyNames.origin, + axis1 = propertyNames.axis1, + axis2 = propertyNames.axis2, + dimension = propertyNames.dimension, + nearest = originValues.nearest, + center = originValues.center, + farthest = originValues.farthest; + + return function() { + switch (this.get(origin)) { + case nearest: + return Math.min(this.get(axis1), this.get(axis2)); + case center: + return Math.min(this.get(axis1), this.get(axis2)) + (0.5 * this.get(dimension)); + case farthest: + return Math.max(this.get(axis1), this.get(axis2)); + } + }; + + } + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + pi = Math.PI, + extend = fabric.util.object.extend; + + if (fabric.Circle) { + fabric.warn('fabric.Circle is already defined.'); + return; + } + + /** + * Circle class + * @class fabric.Circle + * @extends fabric.Object + * @see {@link fabric.Circle#initialize} for constructor definition + */ + fabric.Circle = fabric.util.createClass(fabric.Object, /** @lends fabric.Circle.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'circle', + + /** + * Radius of this circle + * @type Number + * @default + */ + radius: 0, + + /** + * Start angle of the circle, moving clockwise + * @type Number + * @default 0 + */ + startAngle: 0, + + /** + * End angle of the circle + * @type Number + * @default 2Pi + */ + endAngle: pi * 2, + + /** + * Constructor + * @param {Object} [options] Options object + * @return {fabric.Circle} thisArg + */ + initialize: function(options) { + options = options || { }; + + this.callSuper('initialize', options); + this.set('radius', options.radius || 0); + + this.startAngle = options.startAngle || this.startAngle; + this.endAngle = options.endAngle || this.endAngle; + }, + + /** + * @private + * @param {String} key + * @param {*} value + * @return {fabric.Circle} thisArg + */ + _set: function(key, value) { + this.callSuper('_set', key, value); + + if (key === 'radius') { + this.setRadius(value); + } + + return this; + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + return this.callSuper('toObject', ['radius', 'startAngle', 'endAngle'].concat(propertiesToInclude)); + }, + + /* _TO_SVG_START_ */ + /** + * Returns svg representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var markup = this._createBaseSVGMarkup(), x = 0, y = 0, + angle = (this.endAngle - this.startAngle) % ( 2 * pi); + + if (angle === 0) { + if (this.group && this.group.type === 'path-group') { + x = this.left + this.radius; + y = this.top + this.radius; + } + markup.push( + '\n' + ); + } + else { + var startX = Math.cos(this.startAngle) * this.radius, + startY = Math.sin(this.startAngle) * this.radius, + endX = Math.cos(this.endAngle) * this.radius, + endY = Math.sin(this.endAngle) * this.radius, + largeFlag = angle > pi ? '1' : '0'; + + markup.push( + '\n' + ); + } + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * @private + * @param {CanvasRenderingContext2D} ctx context to render on + * @param {Boolean} [noTransform] When true, context is not transformed + */ + _render: function(ctx, noTransform) { + ctx.beginPath(); + ctx.arc(noTransform ? this.left + this.radius : 0, + noTransform ? this.top + this.radius : 0, + this.radius, + this.startAngle, + this.endAngle, false); + this._renderFill(ctx); + this._renderStroke(ctx); + }, + + /** + * Returns horizontal radius of an object (according to how an object is scaled) + * @return {Number} + */ + getRadiusX: function() { + return this.get('radius') * this.get('scaleX'); + }, + + /** + * Returns vertical radius of an object (according to how an object is scaled) + * @return {Number} + */ + getRadiusY: function() { + return this.get('radius') * this.get('scaleY'); + }, + + /** + * Sets radius of an object (and updates width accordingly) + * @return {fabric.Circle} thisArg + */ + setRadius: function(value) { + this.radius = value; + return this.set('width', value * 2).set('height', value * 2); + }, + + /** + * Returns complexity of an instance + * @return {Number} complexity of this instance + */ + complexity: function() { + return 1; + } + }); + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by {@link fabric.Circle.fromElement}) + * @static + * @memberOf fabric.Circle + * @see: http://www.w3.org/TR/SVG/shapes.html#CircleElement + */ + fabric.Circle.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('cx cy r'.split(' ')); + + /** + * Returns {@link fabric.Circle} instance from an SVG element + * @static + * @memberOf fabric.Circle + * @param {SVGElement} element Element to parse + * @param {Object} [options] Options object + * @throws {Error} If value of `r` attribute is missing or invalid + * @return {fabric.Circle} Instance of fabric.Circle + */ + fabric.Circle.fromElement = function(element, options) { + options || (options = { }); + + var parsedAttributes = fabric.parseAttributes(element, fabric.Circle.ATTRIBUTE_NAMES); + + if (!isValidRadius(parsedAttributes)) { + throw new Error('value of `r` attribute is required and can not be negative'); + } + + parsedAttributes.left = parsedAttributes.left || 0; + parsedAttributes.top = parsedAttributes.top || 0; + + var obj = new fabric.Circle(extend(parsedAttributes, options)); + + obj.left -= obj.radius; + obj.top -= obj.radius; + return obj; + }; + + /** + * @private + */ + function isValidRadius(attributes) { + return (('radius' in attributes) && (attributes.radius >= 0)); + } + /* _FROM_SVG_END_ */ + + /** + * Returns {@link fabric.Circle} instance from an object representation + * @static + * @memberOf fabric.Circle + * @param {Object} object Object to create an instance from + * @param {function} [callback] invoked with new instance as first argument + * @return {Object} Instance of fabric.Circle + */ + fabric.Circle.fromObject = function(object, callback) { + var circle = new fabric.Circle(object); + callback && callback(circle); + return circle; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }); + + if (fabric.Triangle) { + fabric.warn('fabric.Triangle is already defined'); + return; + } + + /** + * Triangle class + * @class fabric.Triangle + * @extends fabric.Object + * @return {fabric.Triangle} thisArg + * @see {@link fabric.Triangle#initialize} for constructor definition + */ + fabric.Triangle = fabric.util.createClass(fabric.Object, /** @lends fabric.Triangle.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'triangle', + + /** + * Constructor + * @param {Object} [options] Options object + * @return {Object} thisArg + */ + initialize: function(options) { + options = options || { }; + + this.callSuper('initialize', options); + + this.set('width', options.width || 100) + .set('height', options.height || 100); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _render: function(ctx) { + var widthBy2 = this.width / 2, + heightBy2 = this.height / 2; + + ctx.beginPath(); + ctx.moveTo(-widthBy2, heightBy2); + ctx.lineTo(0, -heightBy2); + ctx.lineTo(widthBy2, heightBy2); + ctx.closePath(); + + this._renderFill(ctx); + this._renderStroke(ctx); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderDashedStroke: function(ctx) { + var widthBy2 = this.width / 2, + heightBy2 = this.height / 2; + + ctx.beginPath(); + fabric.util.drawDashedLine(ctx, -widthBy2, heightBy2, 0, -heightBy2, this.strokeDashArray); + fabric.util.drawDashedLine(ctx, 0, -heightBy2, widthBy2, heightBy2, this.strokeDashArray); + fabric.util.drawDashedLine(ctx, widthBy2, heightBy2, -widthBy2, heightBy2, this.strokeDashArray); + ctx.closePath(); + }, + + /* _TO_SVG_START_ */ + /** + * Returns SVG representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var markup = this._createBaseSVGMarkup(), + widthBy2 = this.width / 2, + heightBy2 = this.height / 2, + points = [ + -widthBy2 + ' ' + heightBy2, + '0 ' + -heightBy2, + widthBy2 + ' ' + heightBy2 + ] + .join(','); + + markup.push( + '' + ); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * Returns complexity of an instance + * @return {Number} complexity of this instance + */ + complexity: function() { + return 1; + } + }); + + /** + * Returns fabric.Triangle instance from an object representation + * @static + * @memberOf fabric.Triangle + * @param {Object} object Object to create an instance from + * @param {Function} [callback] Callback to invoke when an fabric.Triangle instance is created + * @return {Object} instance of Canvas.Triangle + */ + fabric.Triangle.fromObject = function(object, callback) { + var triangle = new fabric.Triangle(object); + callback && callback(triangle); + return triangle; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + piBy2 = Math.PI * 2, + extend = fabric.util.object.extend; + + if (fabric.Ellipse) { + fabric.warn('fabric.Ellipse is already defined.'); + return; + } + + /** + * Ellipse class + * @class fabric.Ellipse + * @extends fabric.Object + * @return {fabric.Ellipse} thisArg + * @see {@link fabric.Ellipse#initialize} for constructor definition + */ + fabric.Ellipse = fabric.util.createClass(fabric.Object, /** @lends fabric.Ellipse.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'ellipse', + + /** + * Horizontal radius + * @type Number + * @default + */ + rx: 0, + + /** + * Vertical radius + * @type Number + * @default + */ + ry: 0, + + /** + * Constructor + * @param {Object} [options] Options object + * @return {fabric.Ellipse} thisArg + */ + initialize: function(options) { + options = options || { }; + + this.callSuper('initialize', options); + + this.set('rx', options.rx || 0); + this.set('ry', options.ry || 0); + }, + + /** + * @private + * @param {String} key + * @param {*} value + * @return {fabric.Ellipse} thisArg + */ + _set: function(key, value) { + this.callSuper('_set', key, value); + switch (key) { + + case 'rx': + this.rx = value; + this.set('width', value * 2); + break; + + case 'ry': + this.ry = value; + this.set('height', value * 2); + break; + + } + return this; + }, + + /** + * Returns horizontal radius of an object (according to how an object is scaled) + * @return {Number} + */ + getRx: function() { + return this.get('rx') * this.get('scaleX'); + }, + + /** + * Returns Vertical radius of an object (according to how an object is scaled) + * @return {Number} + */ + getRy: function() { + return this.get('ry') * this.get('scaleY'); + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + return this.callSuper('toObject', ['rx', 'ry'].concat(propertiesToInclude)); + }, + + /* _TO_SVG_START_ */ + /** + * Returns svg representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var markup = this._createBaseSVGMarkup(), x = 0, y = 0; + if (this.group && this.group.type === 'path-group') { + x = this.left + this.rx; + y = this.top + this.ry; + } + markup.push( + '\n' + ); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * @private + * @param {CanvasRenderingContext2D} ctx context to render on + * @param {Boolean} [noTransform] When true, context is not transformed + */ + _render: function(ctx, noTransform) { + ctx.beginPath(); + ctx.save(); + ctx.transform(1, 0, 0, this.ry / this.rx, 0, 0); + ctx.arc( + noTransform ? this.left + this.rx : 0, + noTransform ? (this.top + this.ry) * this.rx / this.ry : 0, + this.rx, + 0, + piBy2, + false); + ctx.restore(); + this._renderFill(ctx); + this._renderStroke(ctx); + }, + + /** + * Returns complexity of an instance + * @return {Number} complexity + */ + complexity: function() { + return 1; + } + }); + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by {@link fabric.Ellipse.fromElement}) + * @static + * @memberOf fabric.Ellipse + * @see http://www.w3.org/TR/SVG/shapes.html#EllipseElement + */ + fabric.Ellipse.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('cx cy rx ry'.split(' ')); + + /** + * Returns {@link fabric.Ellipse} instance from an SVG element + * @static + * @memberOf fabric.Ellipse + * @param {SVGElement} element Element to parse + * @param {Object} [options] Options object + * @return {fabric.Ellipse} + */ + fabric.Ellipse.fromElement = function(element, options) { + options || (options = { }); + + var parsedAttributes = fabric.parseAttributes(element, fabric.Ellipse.ATTRIBUTE_NAMES); + + parsedAttributes.left = parsedAttributes.left || 0; + parsedAttributes.top = parsedAttributes.top || 0; + + var ellipse = new fabric.Ellipse(extend(parsedAttributes, options)); + + ellipse.top -= ellipse.ry; + ellipse.left -= ellipse.rx; + return ellipse; + }; + /* _FROM_SVG_END_ */ + + /** + * Returns {@link fabric.Ellipse} instance from an object representation + * @static + * @memberOf fabric.Ellipse + * @param {Object} object Object to create an instance from + * @param {function} [callback] invoked with new instance as first argument + * @return {fabric.Ellipse} + */ + fabric.Ellipse.fromObject = function(object, callback) { + var ellipse = new fabric.Ellipse(object); + callback && callback(ellipse); + return ellipse; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend; + + if (fabric.Rect) { + fabric.warn('fabric.Rect is already defined'); + return; + } + + var stateProperties = fabric.Object.prototype.stateProperties.concat(); + stateProperties.push('rx', 'ry', 'x', 'y'); + + /** + * Rectangle class + * @class fabric.Rect + * @extends fabric.Object + * @return {fabric.Rect} thisArg + * @see {@link fabric.Rect#initialize} for constructor definition + */ + fabric.Rect = fabric.util.createClass(fabric.Object, /** @lends fabric.Rect.prototype */ { + + /** + * List of properties to consider when checking if state of an object is changed ({@link fabric.Object#hasStateChanged}) + * as well as for history (undo/redo) purposes + * @type Array + */ + stateProperties: stateProperties, + + /** + * Type of an object + * @type String + * @default + */ + type: 'rect', + + /** + * Horizontal border radius + * @type Number + * @default + */ + rx: 0, + + /** + * Vertical border radius + * @type Number + * @default + */ + ry: 0, + + /** + * Used to specify dash pattern for stroke on this object + * @type Array + */ + strokeDashArray: null, + + /** + * Constructor + * @param {Object} [options] Options object + * @return {Object} thisArg + */ + initialize: function(options) { + options = options || { }; + + this.callSuper('initialize', options); + this._initRxRy(); + + }, + + /** + * Initializes rx/ry attributes + * @private + */ + _initRxRy: function() { + if (this.rx && !this.ry) { + this.ry = this.rx; + } + else if (this.ry && !this.rx) { + this.rx = this.ry; + } + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} noTransform + */ + _render: function(ctx, noTransform) { + + // optimize 1x1 case (used in spray brush) + if (this.width === 1 && this.height === 1) { + ctx.fillRect(-0.5, -0.5, 1, 1); + return; + } + + var rx = this.rx ? Math.min(this.rx, this.width / 2) : 0, + ry = this.ry ? Math.min(this.ry, this.height / 2) : 0, + w = this.width, + h = this.height, + x = noTransform ? this.left : -this.width / 2, + y = noTransform ? this.top : -this.height / 2, + isRounded = rx !== 0 || ry !== 0, + /* "magic number" for bezier approximations of arcs (http://itc.ktu.lt/itc354/Riskus354.pdf) */ + k = 1 - 0.5522847498; + ctx.beginPath(); + + ctx.moveTo(x + rx, y); + + ctx.lineTo(x + w - rx, y); + isRounded && ctx.bezierCurveTo(x + w - k * rx, y, x + w, y + k * ry, x + w, y + ry); + + ctx.lineTo(x + w, y + h - ry); + isRounded && ctx.bezierCurveTo(x + w, y + h - k * ry, x + w - k * rx, y + h, x + w - rx, y + h); + + ctx.lineTo(x + rx, y + h); + isRounded && ctx.bezierCurveTo(x + k * rx, y + h, x, y + h - k * ry, x, y + h - ry); + + ctx.lineTo(x, y + ry); + isRounded && ctx.bezierCurveTo(x, y + k * ry, x + k * rx, y, x + rx, y); + + ctx.closePath(); + + this._renderFill(ctx); + this._renderStroke(ctx); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderDashedStroke: function(ctx) { + var x = -this.width / 2, + y = -this.height / 2, + w = this.width, + h = this.height; + + ctx.beginPath(); + fabric.util.drawDashedLine(ctx, x, y, x + w, y, this.strokeDashArray); + fabric.util.drawDashedLine(ctx, x + w, y, x + w, y + h, this.strokeDashArray); + fabric.util.drawDashedLine(ctx, x + w, y + h, x, y + h, this.strokeDashArray); + fabric.util.drawDashedLine(ctx, x, y + h, x, y, this.strokeDashArray); + ctx.closePath(); + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + return this.callSuper('toObject', ['rx', 'ry'].concat(propertiesToInclude)); + }, + + /* _TO_SVG_START_ */ + /** + * Returns svg representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var markup = this._createBaseSVGMarkup(), x = this.left, y = this.top; + if (!(this.group && this.group.type === 'path-group')) { + x = -this.width / 2; + y = -this.height / 2; + } + markup.push( + '\n'); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * Returns complexity of an instance + * @return {Number} complexity + */ + complexity: function() { + return 1; + } + }); + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by `fabric.Rect.fromElement`) + * @static + * @memberOf fabric.Rect + * @see: http://www.w3.org/TR/SVG/shapes.html#RectElement + */ + fabric.Rect.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('x y rx ry width height'.split(' ')); + + /** + * Returns {@link fabric.Rect} instance from an SVG element + * @static + * @memberOf fabric.Rect + * @param {SVGElement} element Element to parse + * @param {Object} [options] Options object + * @return {fabric.Rect} Instance of fabric.Rect + */ + fabric.Rect.fromElement = function(element, options) { + if (!element) { + return null; + } + options = options || { }; + + var parsedAttributes = fabric.parseAttributes(element, fabric.Rect.ATTRIBUTE_NAMES); + + parsedAttributes.left = parsedAttributes.left || 0; + parsedAttributes.top = parsedAttributes.top || 0; + var rect = new fabric.Rect(extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes)); + rect.visible = rect.visible && rect.width > 0 && rect.height > 0; + return rect; + }; + /* _FROM_SVG_END_ */ + + /** + * Returns {@link fabric.Rect} instance from an object representation + * @static + * @memberOf fabric.Rect + * @param {Object} object Object to create an instance from + * @param {Function} [callback] Callback to invoke when an fabric.Rect instance is created + * @return {Object} instance of fabric.Rect + */ + fabric.Rect.fromObject = function(object, callback) { + var rect = new fabric.Rect(object); + callback && callback(rect); + return rect; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }); + + if (fabric.Polyline) { + fabric.warn('fabric.Polyline is already defined'); + return; + } + + /** + * Polyline class + * @class fabric.Polyline + * @extends fabric.Object + * @see {@link fabric.Polyline#initialize} for constructor definition + */ + fabric.Polyline = fabric.util.createClass(fabric.Object, /** @lends fabric.Polyline.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'polyline', + + /** + * Points array + * @type Array + * @default + */ + points: null, + + /** + * Minimum X from points values, necessary to offset points + * @type Number + * @default + */ + minX: 0, + + /** + * Minimum Y from points values, necessary to offset points + * @type Number + * @default + */ + minY: 0, + + /** + * Constructor + * @param {Array} points Array of points (where each point is an object with x and y) + * @param {Object} [options] Options object + * @return {fabric.Polyline} thisArg + * @example + * var poly = new fabric.Polyline([ + * { x: 10, y: 10 }, + * { x: 50, y: 30 }, + * { x: 40, y: 70 }, + * { x: 60, y: 50 }, + * { x: 100, y: 150 }, + * { x: 40, y: 100 } + * ], { + * stroke: 'red', + * left: 100, + * top: 100 + * }); + */ + initialize: function(points, options) { + return fabric.Polygon.prototype.initialize.call(this, points, options); + }, + + /** + * @private + */ + _calcDimensions: function() { + return fabric.Polygon.prototype._calcDimensions.call(this); + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} Object representation of an instance + */ + toObject: function(propertiesToInclude) { + return fabric.Polygon.prototype.toObject.call(this, propertiesToInclude); + }, + + /* _TO_SVG_START_ */ + /** + * Returns SVG representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + return fabric.Polygon.prototype.toSVG.call(this, reviver); + }, + /* _TO_SVG_END_ */ + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} noTransform + */ + _render: function(ctx, noTransform) { + if (!fabric.Polygon.prototype.commonRender.call(this, ctx, noTransform)) { + return; + } + this._renderFill(ctx); + this._renderStroke(ctx); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderDashedStroke: function(ctx) { + var p1, p2; + + ctx.beginPath(); + for (var i = 0, len = this.points.length; i < len; i++) { + p1 = this.points[i]; + p2 = this.points[i + 1] || p1; + fabric.util.drawDashedLine(ctx, p1.x, p1.y, p2.x, p2.y, this.strokeDashArray); + } + }, + + /** + * Returns complexity of an instance + * @return {Number} complexity of this instance + */ + complexity: function() { + return this.get('points').length; + } + }); + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by {@link fabric.Polyline.fromElement}) + * @static + * @memberOf fabric.Polyline + * @see: http://www.w3.org/TR/SVG/shapes.html#PolylineElement + */ + fabric.Polyline.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat(); + + /** + * Returns fabric.Polyline instance from an SVG element + * @static + * @memberOf fabric.Polyline + * @param {SVGElement} element Element to parse + * @param {Object} [options] Options object + * @return {fabric.Polyline} Instance of fabric.Polyline + */ + fabric.Polyline.fromElement = function(element, options) { + if (!element) { + return null; + } + options || (options = { }); + + var points = fabric.parsePointsAttribute(element.getAttribute('points')), + parsedAttributes = fabric.parseAttributes(element, fabric.Polyline.ATTRIBUTE_NAMES); + + return new fabric.Polyline(points, fabric.util.object.extend(parsedAttributes, options)); + }; + /* _FROM_SVG_END_ */ + + /** + * Returns fabric.Polyline instance from an object representation + * @static + * @memberOf fabric.Polyline + * @param {Object} object Object to create an instance from + * @param {Function} [callback] Callback to invoke when an fabric.Path instance is created + * @return {fabric.Polyline} Instance of fabric.Polyline + */ + fabric.Polyline.fromObject = function(object, callback) { + var polyline = new fabric.Polyline(object.points, object); + callback && callback(polyline); + return polyline; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + min = fabric.util.array.min, + max = fabric.util.array.max, + toFixed = fabric.util.toFixed; + + if (fabric.Polygon) { + fabric.warn('fabric.Polygon is already defined'); + return; + } + + /** + * Polygon class + * @class fabric.Polygon + * @extends fabric.Object + * @see {@link fabric.Polygon#initialize} for constructor definition + */ + fabric.Polygon = fabric.util.createClass(fabric.Object, /** @lends fabric.Polygon.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'polygon', + + /** + * Points array + * @type Array + * @default + */ + points: null, + + /** + * Minimum X from points values, necessary to offset points + * @type Number + * @default + */ + minX: 0, + + /** + * Minimum Y from points values, necessary to offset points + * @type Number + * @default + */ + minY: 0, + + /** + * Constructor + * @param {Array} points Array of points + * @param {Object} [options] Options object + * @return {fabric.Polygon} thisArg + */ + initialize: function(points, options) { + options = options || { }; + this.points = points || []; + this.callSuper('initialize', options); + this._calcDimensions(); + if (!('top' in options)) { + this.top = this.minY; + } + if (!('left' in options)) { + this.left = this.minX; + } + this.pathOffset = { + x: this.minX + this.width / 2, + y: this.minY + this.height / 2 + }; + }, + + /** + * @private + */ + _calcDimensions: function() { + + var points = this.points, + minX = min(points, 'x'), + minY = min(points, 'y'), + maxX = max(points, 'x'), + maxY = max(points, 'y'); + + this.width = (maxX - minX) || 0; + this.height = (maxY - minY) || 0; + this.minX = minX || 0; + this.minY = minY || 0; + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} Object representation of an instance + */ + toObject: function(propertiesToInclude) { + return extend(this.callSuper('toObject', propertiesToInclude), { + points: this.points.concat() + }); + }, + + /* _TO_SVG_START_ */ + /** + * Returns svg representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var points = [], addTransform, + markup = this._createBaseSVGMarkup(); + + for (var i = 0, len = this.points.length; i < len; i++) { + points.push(toFixed(this.points[i].x, 2), ',', toFixed(this.points[i].y, 2), ' '); + } + if (!(this.group && this.group.type === 'path-group')) { + addTransform = ' translate(' + (-this.pathOffset.x) + ', ' + (-this.pathOffset.y) + ') '; + } + markup.push( + '<', this.type, ' ', this.getSvgId(), + 'points="', points.join(''), + '" style="', this.getSvgStyles(), + '" transform="', this.getSvgTransform(), addTransform, + ' ', this.getSvgTransformMatrix(), + '"/>\n' + ); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} noTransform + */ + _render: function(ctx, noTransform) { + if (!this.commonRender(ctx, noTransform)) { + return; + } + this._renderFill(ctx); + if (this.stroke || this.strokeDashArray) { + ctx.closePath(); + this._renderStroke(ctx); + } + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} noTransform + */ + commonRender: function(ctx, noTransform) { + var point, len = this.points.length; + + if (!len || isNaN(this.points[len - 1].y)) { + // do not draw if no points or odd points + // NaN comes from parseFloat of a empty string in parser + return false; + } + + noTransform || ctx.translate(-this.pathOffset.x, -this.pathOffset.y); + ctx.beginPath(); + ctx.moveTo(this.points[0].x, this.points[0].y); + for (var i = 0; i < len; i++) { + point = this.points[i]; + ctx.lineTo(point.x, point.y); + } + return true; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderDashedStroke: function(ctx) { + fabric.Polyline.prototype._renderDashedStroke.call(this, ctx); + ctx.closePath(); + }, + + /** + * Returns complexity of an instance + * @return {Number} complexity of this instance + */ + complexity: function() { + return this.points.length; + } + }); + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by `fabric.Polygon.fromElement`) + * @static + * @memberOf fabric.Polygon + * @see: http://www.w3.org/TR/SVG/shapes.html#PolygonElement + */ + fabric.Polygon.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat(); + + /** + * Returns {@link fabric.Polygon} instance from an SVG element + * @static + * @memberOf fabric.Polygon + * @param {SVGElement} element Element to parse + * @param {Object} [options] Options object + * @return {fabric.Polygon} Instance of fabric.Polygon + */ + fabric.Polygon.fromElement = function(element, options) { + if (!element) { + return null; + } + + options || (options = { }); + + var points = fabric.parsePointsAttribute(element.getAttribute('points')), + parsedAttributes = fabric.parseAttributes(element, fabric.Polygon.ATTRIBUTE_NAMES); + + return new fabric.Polygon(points, extend(parsedAttributes, options)); + }; + /* _FROM_SVG_END_ */ + + /** + * Returns fabric.Polygon instance from an object representation + * @static + * @memberOf fabric.Polygon + * @param {Object} object Object to create an instance from + * @param {Function} [callback] Callback to invoke when an fabric.Path instance is created + * @return {fabric.Polygon} Instance of fabric.Polygon + */ + fabric.Polygon.fromObject = function(object, callback) { + var polygon = new fabric.Polygon(object.points, object); + callback && callback(polygon); + return polygon; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + min = fabric.util.array.min, + max = fabric.util.array.max, + extend = fabric.util.object.extend, + _toString = Object.prototype.toString, + drawArc = fabric.util.drawArc, + commandLengths = { + m: 2, + l: 2, + h: 1, + v: 1, + c: 6, + s: 4, + q: 4, + t: 2, + a: 7 + }, + repeatedCommands = { + m: 'l', + M: 'L' + }; + + if (fabric.Path) { + fabric.warn('fabric.Path is already defined'); + return; + } + + /** + * Path class + * @class fabric.Path + * @extends fabric.Object + * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#path_and_pathgroup} + * @see {@link fabric.Path#initialize} for constructor definition + */ + fabric.Path = fabric.util.createClass(fabric.Object, /** @lends fabric.Path.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'path', + + /** + * Array of path points + * @type Array + * @default + */ + path: null, + + /** + * Minimum X from points values, necessary to offset points + * @type Number + * @default + */ + minX: 0, + + /** + * Minimum Y from points values, necessary to offset points + * @type Number + * @default + */ + minY: 0, + + /** + * Constructor + * @param {Array|String} path Path data (sequence of coordinates and corresponding "command" tokens) + * @param {Object} [options] Options object + * @return {fabric.Path} thisArg + */ + initialize: function(path, options) { + options = options || { }; + + this.setOptions(options); + + if (!path) { + path = []; + } + + var fromArray = _toString.call(path) === '[object Array]'; + + this.path = fromArray + ? path + // one of commands (m,M,l,L,q,Q,c,C,etc.) followed by non-command characters (i.e. command values) + : path.match && path.match(/[mzlhvcsqta][^mzlhvcsqta]*/gi); + + if (!this.path) { + return; + } + + if (!fromArray) { + this.path = this._parsePath(); + } + + this._setPositionDimensions(options); + + if (options.sourcePath) { + this.setSourcePath(options.sourcePath); + } + }, + + /** + * @private + * @param {Object} options Options object + */ + _setPositionDimensions: function(options) { + var calcDim = this._parseDimensions(); + + this.minX = calcDim.left; + this.minY = calcDim.top; + this.width = calcDim.width; + this.height = calcDim.height; + + if (typeof options.left === 'undefined') { + this.left = calcDim.left + (this.originX === 'center' + ? this.width / 2 + : this.originX === 'right' + ? this.width + : 0); + } + + if (typeof options.top === 'undefined') { + this.top = calcDim.top + (this.originY === 'center' + ? this.height / 2 + : this.originY === 'bottom' + ? this.height + : 0); + } + + this.pathOffset = this.pathOffset || { + x: this.minX + this.width / 2, + y: this.minY + this.height / 2 + }; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx context to render path on + */ + _renderPathCommands: function(ctx) { + var current, // current instruction + previous = null, + subpathStartX = 0, + subpathStartY = 0, + x = 0, // current x + y = 0, // current y + controlX = 0, // current control point x + controlY = 0, // current control point y + tempX, + tempY, + l = -this.pathOffset.x, + t = -this.pathOffset.y; + + if (this.group && this.group.type === 'path-group') { + l = 0; + t = 0; + } + + ctx.beginPath(); + + for (var i = 0, len = this.path.length; i < len; ++i) { + + current = this.path[i]; + + switch (current[0]) { // first letter + + case 'l': // lineto, relative + x += current[1]; + y += current[2]; + ctx.lineTo(x + l, y + t); + break; + + case 'L': // lineto, absolute + x = current[1]; + y = current[2]; + ctx.lineTo(x + l, y + t); + break; + + case 'h': // horizontal lineto, relative + x += current[1]; + ctx.lineTo(x + l, y + t); + break; + + case 'H': // horizontal lineto, absolute + x = current[1]; + ctx.lineTo(x + l, y + t); + break; + + case 'v': // vertical lineto, relative + y += current[1]; + ctx.lineTo(x + l, y + t); + break; + + case 'V': // verical lineto, absolute + y = current[1]; + ctx.lineTo(x + l, y + t); + break; + + case 'm': // moveTo, relative + x += current[1]; + y += current[2]; + subpathStartX = x; + subpathStartY = y; + ctx.moveTo(x + l, y + t); + break; + + case 'M': // moveTo, absolute + x = current[1]; + y = current[2]; + subpathStartX = x; + subpathStartY = y; + ctx.moveTo(x + l, y + t); + break; + + case 'c': // bezierCurveTo, relative + tempX = x + current[5]; + tempY = y + current[6]; + controlX = x + current[3]; + controlY = y + current[4]; + ctx.bezierCurveTo( + x + current[1] + l, // x1 + y + current[2] + t, // y1 + controlX + l, // x2 + controlY + t, // y2 + tempX + l, + tempY + t + ); + x = tempX; + y = tempY; + break; + + case 'C': // bezierCurveTo, absolute + x = current[5]; + y = current[6]; + controlX = current[3]; + controlY = current[4]; + ctx.bezierCurveTo( + current[1] + l, + current[2] + t, + controlX + l, + controlY + t, + x + l, + y + t + ); + break; + + case 's': // shorthand cubic bezierCurveTo, relative + + // transform to absolute x,y + tempX = x + current[3]; + tempY = y + current[4]; + + if (previous[0].match(/[CcSs]/) === null) { + // If there is no previous command or if the previous command was not a C, c, S, or s, + // the control point is coincident with the current point + controlX = x; + controlY = y; + } + else { + // calculate reflection of previous control points + controlX = 2 * x - controlX; + controlY = 2 * y - controlY; + } + + ctx.bezierCurveTo( + controlX + l, + controlY + t, + x + current[1] + l, + y + current[2] + t, + tempX + l, + tempY + t + ); + // set control point to 2nd one of this command + // "... the first control point is assumed to be + // the reflection of the second control point on + // the previous command relative to the current point." + controlX = x + current[1]; + controlY = y + current[2]; + + x = tempX; + y = tempY; + break; + + case 'S': // shorthand cubic bezierCurveTo, absolute + tempX = current[3]; + tempY = current[4]; + if (previous[0].match(/[CcSs]/) === null) { + // If there is no previous command or if the previous command was not a C, c, S, or s, + // the control point is coincident with the current point + controlX = x; + controlY = y; + } + else { + // calculate reflection of previous control points + controlX = 2 * x - controlX; + controlY = 2 * y - controlY; + } + ctx.bezierCurveTo( + controlX + l, + controlY + t, + current[1] + l, + current[2] + t, + tempX + l, + tempY + t + ); + x = tempX; + y = tempY; + + // set control point to 2nd one of this command + // "... the first control point is assumed to be + // the reflection of the second control point on + // the previous command relative to the current point." + controlX = current[1]; + controlY = current[2]; + + break; + + case 'q': // quadraticCurveTo, relative + // transform to absolute x,y + tempX = x + current[3]; + tempY = y + current[4]; + + controlX = x + current[1]; + controlY = y + current[2]; + + ctx.quadraticCurveTo( + controlX + l, + controlY + t, + tempX + l, + tempY + t + ); + x = tempX; + y = tempY; + break; + + case 'Q': // quadraticCurveTo, absolute + tempX = current[3]; + tempY = current[4]; + + ctx.quadraticCurveTo( + current[1] + l, + current[2] + t, + tempX + l, + tempY + t + ); + x = tempX; + y = tempY; + controlX = current[1]; + controlY = current[2]; + break; + + case 't': // shorthand quadraticCurveTo, relative + + // transform to absolute x,y + tempX = x + current[1]; + tempY = y + current[2]; + + if (previous[0].match(/[QqTt]/) === null) { + // If there is no previous command or if the previous command was not a Q, q, T or t, + // assume the control point is coincident with the current point + controlX = x; + controlY = y; + } + else { + // calculate reflection of previous control point + controlX = 2 * x - controlX; + controlY = 2 * y - controlY; + } + + ctx.quadraticCurveTo( + controlX + l, + controlY + t, + tempX + l, + tempY + t + ); + x = tempX; + y = tempY; + + break; + + case 'T': + tempX = current[1]; + tempY = current[2]; + + if (previous[0].match(/[QqTt]/) === null) { + // If there is no previous command or if the previous command was not a Q, q, T or t, + // assume the control point is coincident with the current point + controlX = x; + controlY = y; + } + else { + // calculate reflection of previous control point + controlX = 2 * x - controlX; + controlY = 2 * y - controlY; + } + ctx.quadraticCurveTo( + controlX + l, + controlY + t, + tempX + l, + tempY + t + ); + x = tempX; + y = tempY; + break; + + case 'a': + // TODO: optimize this + drawArc(ctx, x + l, y + t, [ + current[1], + current[2], + current[3], + current[4], + current[5], + current[6] + x + l, + current[7] + y + t + ]); + x += current[6]; + y += current[7]; + break; + + case 'A': + // TODO: optimize this + drawArc(ctx, x + l, y + t, [ + current[1], + current[2], + current[3], + current[4], + current[5], + current[6] + l, + current[7] + t + ]); + x = current[6]; + y = current[7]; + break; + + case 'z': + case 'Z': + x = subpathStartX; + y = subpathStartY; + ctx.closePath(); + break; + } + previous = current; + } + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx context to render path on + */ + _render: function(ctx) { + this._renderPathCommands(ctx); + this._renderFill(ctx); + this._renderStroke(ctx); + }, + + /** + * Returns string representation of an instance + * @return {String} string representation of an instance + */ + toString: function() { + return '#'; + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + var o = extend(this.callSuper('toObject', ['sourcePath', 'pathOffset'].concat(propertiesToInclude)), { + path: this.path.map(function(item) { return item.slice() }) + }); + return o; + }, + + /** + * Returns dataless object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toDatalessObject: function(propertiesToInclude) { + var o = this.toObject(propertiesToInclude); + if (this.sourcePath) { + o.path = this.sourcePath; + } + delete o.sourcePath; + return o; + }, + + /* _TO_SVG_START_ */ + /** + * Returns svg representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var chunks = [], + markup = this._createBaseSVGMarkup(), addTransform = ''; + + for (var i = 0, len = this.path.length; i < len; i++) { + chunks.push(this.path[i].join(' ')); + } + var path = chunks.join(' '); + if (!(this.group && this.group.type === 'path-group')) { + addTransform = ' translate(' + (-this.pathOffset.x) + ', ' + (-this.pathOffset.y) + ') '; + } + markup.push( + '\n' + ); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * Returns number representation of an instance complexity + * @return {Number} complexity of this instance + */ + complexity: function() { + return this.path.length; + }, + + /** + * @private + */ + _parsePath: function() { + var result = [], + coords = [], + currentPath, + parsed, + re = /([-+]?((\d+\.\d+)|((\d+)|(\.\d+)))(?:e[-+]?\d+)?)/ig, + match, + coordsStr; + + for (var i = 0, coordsParsed, len = this.path.length; i < len; i++) { + currentPath = this.path[i]; + + coordsStr = currentPath.slice(1).trim(); + coords.length = 0; + + while ((match = re.exec(coordsStr))) { + coords.push(match[0]); + } + + coordsParsed = [currentPath.charAt(0)]; + + for (var j = 0, jlen = coords.length; j < jlen; j++) { + parsed = parseFloat(coords[j]); + if (!isNaN(parsed)) { + coordsParsed.push(parsed); + } + } + + var command = coordsParsed[0], + commandLength = commandLengths[command.toLowerCase()], + repeatedCommand = repeatedCommands[command] || command; + + if (coordsParsed.length - 1 > commandLength) { + for (var k = 1, klen = coordsParsed.length; k < klen; k += commandLength) { + result.push([command].concat(coordsParsed.slice(k, k + commandLength))); + command = repeatedCommand; + } + } + else { + result.push(coordsParsed); + } + } + + return result; + }, + + /** + * @private + */ + _parseDimensions: function() { + + var aX = [], + aY = [], + current, // current instruction + previous = null, + subpathStartX = 0, + subpathStartY = 0, + x = 0, // current x + y = 0, // current y + controlX = 0, // current control point x + controlY = 0, // current control point y + tempX, + tempY, + bounds; + + for (var i = 0, len = this.path.length; i < len; ++i) { + + current = this.path[i]; + + switch (current[0]) { // first letter + + case 'l': // lineto, relative + x += current[1]; + y += current[2]; + bounds = []; + break; + + case 'L': // lineto, absolute + x = current[1]; + y = current[2]; + bounds = []; + break; + + case 'h': // horizontal lineto, relative + x += current[1]; + bounds = []; + break; + + case 'H': // horizontal lineto, absolute + x = current[1]; + bounds = []; + break; + + case 'v': // vertical lineto, relative + y += current[1]; + bounds = []; + break; + + case 'V': // verical lineto, absolute + y = current[1]; + bounds = []; + break; + + case 'm': // moveTo, relative + x += current[1]; + y += current[2]; + subpathStartX = x; + subpathStartY = y; + bounds = []; + break; + + case 'M': // moveTo, absolute + x = current[1]; + y = current[2]; + subpathStartX = x; + subpathStartY = y; + bounds = []; + break; + + case 'c': // bezierCurveTo, relative + tempX = x + current[5]; + tempY = y + current[6]; + controlX = x + current[3]; + controlY = y + current[4]; + bounds = fabric.util.getBoundsOfCurve(x, y, + x + current[1], // x1 + y + current[2], // y1 + controlX, // x2 + controlY, // y2 + tempX, + tempY + ); + x = tempX; + y = tempY; + break; + + case 'C': // bezierCurveTo, absolute + x = current[5]; + y = current[6]; + controlX = current[3]; + controlY = current[4]; + bounds = fabric.util.getBoundsOfCurve(x, y, + current[1], + current[2], + controlX, + controlY, + x, + y + ); + break; + + case 's': // shorthand cubic bezierCurveTo, relative + + // transform to absolute x,y + tempX = x + current[3]; + tempY = y + current[4]; + + if (previous[0].match(/[CcSs]/) === null) { + // If there is no previous command or if the previous command was not a C, c, S, or s, + // the control point is coincident with the current point + controlX = x; + controlY = y; + } + else { + // calculate reflection of previous control points + controlX = 2 * x - controlX; + controlY = 2 * y - controlY; + } + + bounds = fabric.util.getBoundsOfCurve(x, y, + controlX, + controlY, + x + current[1], + y + current[2], + tempX, + tempY + ); + // set control point to 2nd one of this command + // "... the first control point is assumed to be + // the reflection of the second control point on + // the previous command relative to the current point." + controlX = x + current[1]; + controlY = y + current[2]; + x = tempX; + y = tempY; + break; + + case 'S': // shorthand cubic bezierCurveTo, absolute + tempX = current[3]; + tempY = current[4]; + if (previous[0].match(/[CcSs]/) === null) { + // If there is no previous command or if the previous command was not a C, c, S, or s, + // the control point is coincident with the current point + controlX = x; + controlY = y; + } + else { + // calculate reflection of previous control points + controlX = 2 * x - controlX; + controlY = 2 * y - controlY; + } + bounds = fabric.util.getBoundsOfCurve(x, y, + controlX, + controlY, + current[1], + current[2], + tempX, + tempY + ); + x = tempX; + y = tempY; + // set control point to 2nd one of this command + // "... the first control point is assumed to be + // the reflection of the second control point on + // the previous command relative to the current point." + controlX = current[1]; + controlY = current[2]; + break; + + case 'q': // quadraticCurveTo, relative + // transform to absolute x,y + tempX = x + current[3]; + tempY = y + current[4]; + controlX = x + current[1]; + controlY = y + current[2]; + bounds = fabric.util.getBoundsOfCurve(x, y, + controlX, + controlY, + controlX, + controlY, + tempX, + tempY + ); + x = tempX; + y = tempY; + break; + + case 'Q': // quadraticCurveTo, absolute + controlX = current[1]; + controlY = current[2]; + bounds = fabric.util.getBoundsOfCurve(x, y, + controlX, + controlY, + controlX, + controlY, + current[3], + current[4] + ); + x = current[3]; + y = current[4]; + break; + + case 't': // shorthand quadraticCurveTo, relative + // transform to absolute x,y + tempX = x + current[1]; + tempY = y + current[2]; + if (previous[0].match(/[QqTt]/) === null) { + // If there is no previous command or if the previous command was not a Q, q, T or t, + // assume the control point is coincident with the current point + controlX = x; + controlY = y; + } + else { + // calculate reflection of previous control point + controlX = 2 * x - controlX; + controlY = 2 * y - controlY; + } + + bounds = fabric.util.getBoundsOfCurve(x, y, + controlX, + controlY, + controlX, + controlY, + tempX, + tempY + ); + x = tempX; + y = tempY; + + break; + + case 'T': + tempX = current[1]; + tempY = current[2]; + + if (previous[0].match(/[QqTt]/) === null) { + // If there is no previous command or if the previous command was not a Q, q, T or t, + // assume the control point is coincident with the current point + controlX = x; + controlY = y; + } + else { + // calculate reflection of previous control point + controlX = 2 * x - controlX; + controlY = 2 * y - controlY; + } + bounds = fabric.util.getBoundsOfCurve(x, y, + controlX, + controlY, + controlX, + controlY, + tempX, + tempY + ); + x = tempX; + y = tempY; + break; + + case 'a': + // TODO: optimize this + bounds = fabric.util.getBoundsOfArc(x, y, + current[1], + current[2], + current[3], + current[4], + current[5], + current[6] + x, + current[7] + y + ); + x += current[6]; + y += current[7]; + break; + + case 'A': + // TODO: optimize this + bounds = fabric.util.getBoundsOfArc(x, y, + current[1], + current[2], + current[3], + current[4], + current[5], + current[6], + current[7] + ); + x = current[6]; + y = current[7]; + break; + + case 'z': + case 'Z': + x = subpathStartX; + y = subpathStartY; + break; + } + previous = current; + bounds.forEach(function (point) { + aX.push(point.x); + aY.push(point.y); + }); + aX.push(x); + aY.push(y); + } + + var minX = min(aX) || 0, + minY = min(aY) || 0, + maxX = max(aX) || 0, + maxY = max(aY) || 0, + deltaX = maxX - minX, + deltaY = maxY - minY, + + o = { + left: minX, + top: minY, + width: deltaX, + height: deltaY + }; + + return o; + } + }); + + /** + * Creates an instance of fabric.Path from an object + * @static + * @memberOf fabric.Path + * @param {Object} object + * @param {Function} [callback] Callback to invoke when an fabric.Path instance is created + */ + fabric.Path.fromObject = function(object, callback) { + // remove this pattern rom 2.0, accept just object. + var path; + if (typeof object.path === 'string') { + fabric.loadSVGFromURL(object.path, function (elements) { + var pathUrl = object.path; + path = elements[0]; + delete object.path; + + fabric.util.object.extend(path, object); + path.setSourcePath(pathUrl); + + callback && callback(path); + }); + } + else { + path = new fabric.Path(object.path, object); + callback && callback(path); + return path; + } + }; + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by `fabric.Path.fromElement`) + * @static + * @memberOf fabric.Path + * @see http://www.w3.org/TR/SVG/paths.html#PathElement + */ + fabric.Path.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat(['d']); + + /** + * Creates an instance of fabric.Path from an SVG element + * @static + * @memberOf fabric.Path + * @param {SVGElement} element to parse + * @param {Function} callback Callback to invoke when an fabric.Path instance is created + * @param {Object} [options] Options object + */ + fabric.Path.fromElement = function(element, callback, options) { + var parsedAttributes = fabric.parseAttributes(element, fabric.Path.ATTRIBUTE_NAMES); + callback && callback(new fabric.Path(parsedAttributes.d, extend(parsedAttributes, options))); + }; + /* _FROM_SVG_END_ */ + + /** + * Indicates that instances of this type are async + * @static + * @memberOf fabric.Path + * @type Boolean + * @default + */ + fabric.Path.async = true; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + invoke = fabric.util.array.invoke, + parentToObject = fabric.Object.prototype.toObject; + + if (fabric.PathGroup) { + fabric.warn('fabric.PathGroup is already defined'); + return; + } + + /** + * Path group class + * @class fabric.PathGroup + * @extends fabric.Path + * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#path_and_pathgroup} + * @see {@link fabric.PathGroup#initialize} for constructor definition + */ + fabric.PathGroup = fabric.util.createClass(fabric.Path, /** @lends fabric.PathGroup.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'path-group', + + /** + * Fill value + * @type String + * @default + */ + fill: '', + + /** + * Constructor + * @param {Array} paths + * @param {Object} [options] Options object + * @return {fabric.PathGroup} thisArg + */ + initialize: function(paths, options) { + + options = options || { }; + this.paths = paths || []; + + for (var i = this.paths.length; i--;) { + this.paths[i].group = this; + } + + if (options.toBeParsed) { + this.parseDimensionsFromPaths(options); + delete options.toBeParsed; + } + this.setOptions(options); + this.setCoords(); + + if (options.sourcePath) { + this.setSourcePath(options.sourcePath); + } + }, + + /** + * Calculate width and height based on paths contained + */ + parseDimensionsFromPaths: function(options) { + var points, p, xC = [], yC = [], path, height, width, + m; + for (var j = this.paths.length; j--;) { + path = this.paths[j]; + height = path.height + path.strokeWidth; + width = path.width + path.strokeWidth; + points = [ + { x: path.left, y: path.top }, + { x: path.left + width, y: path.top }, + { x: path.left, y: path.top + height }, + { x: path.left + width, y: path.top + height } + ]; + m = this.paths[j].transformMatrix; + for (var i = 0; i < points.length; i++) { + p = points[i]; + if (m) { + p = fabric.util.transformPoint(p, m, false); + } + xC.push(p.x); + yC.push(p.y); + } + } + options.width = Math.max.apply(null, xC); + options.height = Math.max.apply(null, yC); + }, + + /** + * Renders this group on a specified context + * @param {CanvasRenderingContext2D} ctx Context to render this instance on + */ + render: function(ctx) { + // do not render if object is not visible + if (!this.visible) { + return; + } + + ctx.save(); + + if (this.transformMatrix) { + ctx.transform.apply(ctx, this.transformMatrix); + } + this.transform(ctx); + + this._setShadow(ctx); + this.clipTo && fabric.util.clipContext(this, ctx); + ctx.translate(-this.width / 2, -this.height / 2); + for (var i = 0, l = this.paths.length; i < l; ++i) { + this.paths[i].render(ctx, true); + } + this.clipTo && ctx.restore(); + ctx.restore(); + }, + + /** + * Sets certain property to a certain value + * @param {String} prop + * @param {*} value + * @return {fabric.PathGroup} thisArg + */ + _set: function(prop, value) { + + if (prop === 'fill' && value && this.isSameColor()) { + var i = this.paths.length; + while (i--) { + this.paths[i]._set(prop, value); + } + } + + return this.callSuper('_set', prop, value); + }, + + /** + * Returns object representation of this path group + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + var o = extend(parentToObject.call(this, ['sourcePath'].concat(propertiesToInclude)), { + paths: invoke(this.getObjects(), 'toObject', propertiesToInclude) + }); + return o; + }, + + /** + * Returns dataless object representation of this path group + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} dataless object representation of an instance + */ + toDatalessObject: function(propertiesToInclude) { + var o = this.toObject(propertiesToInclude); + if (this.sourcePath) { + o.paths = this.sourcePath; + } + return o; + }, + + /* _TO_SVG_START_ */ + /** + * Returns svg representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var objects = this.getObjects(), + p = this.getPointByOrigin('left', 'top'), + translatePart = 'translate(' + p.x + ' ' + p.y + ')', + markup = this._createBaseSVGMarkup(); + markup.push( + '\n' + ); + + for (var i = 0, len = objects.length; i < len; i++) { + markup.push('\t', objects[i].toSVG(reviver)); + } + markup.push('\n'); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * Returns a string representation of this path group + * @return {String} string representation of an object + */ + toString: function() { + return '#'; + }, + + /** + * Returns true if all paths in this group are of same color + * @return {Boolean} true if all paths are of the same color (`fill`) + */ + isSameColor: function() { + var firstPathFill = this.getObjects()[0].get('fill') || ''; + if (typeof firstPathFill !== 'string') { + return false; + } + firstPathFill = firstPathFill.toLowerCase(); + return this.getObjects().every(function(path) { + var pathFill = path.get('fill') || ''; + return typeof pathFill === 'string' && (pathFill).toLowerCase() === firstPathFill; + }); + }, + + /** + * Returns number representation of object's complexity + * @return {Number} complexity + */ + complexity: function() { + return this.paths.reduce(function(total, path) { + return total + ((path && path.complexity) ? path.complexity() : 0); + }, 0); + }, + + /** + * Returns all paths in this path group + * @return {Array} array of path objects included in this path group + */ + getObjects: function() { + return this.paths; + } + }); + + /** + * Creates fabric.PathGroup instance from an object representation + * @static + * @memberOf fabric.PathGroup + * @param {Object} object Object to create an instance from + * @param {Function} [callback] Callback to invoke when an fabric.PathGroup instance is created + */ + fabric.PathGroup.fromObject = function(object, callback) { + // remove this pattern from 2.0 accepts only object + if (typeof object.paths === 'string') { + fabric.loadSVGFromURL(object.paths, function (elements) { + + var pathUrl = object.paths; + delete object.paths; + + var pathGroup = fabric.util.groupSVGElements(elements, object, pathUrl); + + callback(pathGroup); + }); + } + else { + fabric.util.enlivenObjects(object.paths, function(enlivenedObjects) { + delete object.paths; + callback(new fabric.PathGroup(enlivenedObjects, object)); + }); + } + }; + + /** + * Indicates that instances of this type are async + * @static + * @memberOf fabric.PathGroup + * @type Boolean + * @default + */ + fabric.PathGroup.async = true; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + min = fabric.util.array.min, + max = fabric.util.array.max, + invoke = fabric.util.array.invoke; + + if (fabric.Group) { + return; + } + + // lock-related properties, for use in fabric.Group#get + // to enable locking behavior on group + // when one of its objects has lock-related properties set + var _lockProperties = { + lockMovementX: true, + lockMovementY: true, + lockRotation: true, + lockScalingX: true, + lockScalingY: true, + lockUniScaling: true + }; + + /** + * Group class + * @class fabric.Group + * @extends fabric.Object + * @mixes fabric.Collection + * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#groups} + * @see {@link fabric.Group#initialize} for constructor definition + */ + fabric.Group = fabric.util.createClass(fabric.Object, fabric.Collection, /** @lends fabric.Group.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'group', + + /** + * Width of stroke + * @type Number + * @default + */ + strokeWidth: 0, + + /** + * Indicates if click events should also check for subtargets + * @type Boolean + * @default + */ + subTargetCheck: false, + + /** + * Constructor + * @param {Object} objects Group objects + * @param {Object} [options] Options object + * @param {Boolean} [isAlreadyGrouped] if true, objects have been grouped already. + * @return {Object} thisArg + */ + initialize: function(objects, options, isAlreadyGrouped) { + options = options || { }; + + this._objects = []; + // if objects enclosed in a group have been grouped already, + // we cannot change properties of objects. + // Thus we need to set options to group without objects, + // because delegatedProperties propagate to objects. + isAlreadyGrouped && this.callSuper('initialize', options); + + this._objects = objects || []; + for (var i = this._objects.length; i--; ) { + this._objects[i].group = this; + } + + this.originalState = { }; + + if (options.originX) { + this.originX = options.originX; + } + if (options.originY) { + this.originY = options.originY; + } + + if (isAlreadyGrouped) { + // do not change coordinate of objects enclosed in a group, + // because objects coordinate system have been group coodinate system already. + this._updateObjectsCoords(true); + } + else { + this._calcBounds(); + this._updateObjectsCoords(); + this.callSuper('initialize', options); + } + + this.setCoords(); + this.saveCoords(); + }, + + /** + * @private + * @param {Boolean} [skipCoordsChange] if true, coordinates of objects enclosed in a group do not change + */ + _updateObjectsCoords: function(skipCoordsChange) { + for (var i = this._objects.length; i--; ){ + this._updateObjectCoords(this._objects[i], skipCoordsChange); + } + }, + + /** + * @private + * @param {Object} object + * @param {Boolean} [skipCoordsChange] if true, coordinates of object dose not change + */ + _updateObjectCoords: function(object, skipCoordsChange) { + // do not display corners of objects enclosed in a group + object.__origHasControls = object.hasControls; + object.hasControls = false; + + if (skipCoordsChange) { + return; + } + + var objectLeft = object.getLeft(), + objectTop = object.getTop(), + center = this.getCenterPoint(); + + object.set({ + originalLeft: objectLeft, + originalTop: objectTop, + left: objectLeft - center.x, + top: objectTop - center.y + }); + object.setCoords(); + }, + + /** + * Returns string represenation of a group + * @return {String} + */ + toString: function() { + return '#'; + }, + + /** + * Adds an object to a group; Then recalculates group's dimension, position. + * @param {Object} object + * @return {fabric.Group} thisArg + * @chainable + */ + addWithUpdate: function(object) { + this._restoreObjectsState(); + fabric.util.resetObjectTransform(this); + if (object) { + this._objects.push(object); + object.group = this; + object._set('canvas', this.canvas); + } + // since _restoreObjectsState set objects inactive + this.forEachObject(this._setObjectActive, this); + this._calcBounds(); + this._updateObjectsCoords(); + return this; + }, + + /** + * @private + */ + _setObjectActive: function(object) { + object.set('active', true); + object.group = this; + }, + + /** + * Removes an object from a group; Then recalculates group's dimension, position. + * @param {Object} object + * @return {fabric.Group} thisArg + * @chainable + */ + removeWithUpdate: function(object) { + this._restoreObjectsState(); + fabric.util.resetObjectTransform(this); + // since _restoreObjectsState set objects inactive + this.forEachObject(this._setObjectActive, this); + + this.remove(object); + this._calcBounds(); + this._updateObjectsCoords(); + + return this; + }, + + /** + * @private + */ + _onObjectAdded: function(object) { + object.group = this; + object._set('canvas', this.canvas); + }, + + /** + * @private + */ + _onObjectRemoved: function(object) { + delete object.group; + object.set('active', false); + }, + + /** + * Properties that are delegated to group objects when reading/writing + * @param {Object} delegatedProperties + */ + delegatedProperties: { + fill: true, + stroke: true, + strokeWidth: true, + fontFamily: true, + fontWeight: true, + fontSize: true, + fontStyle: true, + lineHeight: true, + textDecoration: true, + textAlign: true, + backgroundColor: true + }, + + /** + * @private + */ + _set: function(key, value) { + var i = this._objects.length; + + if (this.delegatedProperties[key] || key === 'canvas') { + while (i--) { + this._objects[i].set(key, value); + } + } + else { + while (i--) { + this._objects[i].setOnGroup(key, value); + } + } + + this.callSuper('_set', key, value); + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + return extend(this.callSuper('toObject', propertiesToInclude), { + objects: invoke(this._objects, 'toObject', propertiesToInclude) + }); + }, + + /** + * Renders instance on a given context + * @param {CanvasRenderingContext2D} ctx context to render instance on + */ + render: function(ctx) { + // do not render if object is not visible + if (!this.visible) { + return; + } + + ctx.save(); + if (this.transformMatrix) { + ctx.transform.apply(ctx, this.transformMatrix); + } + this.transform(ctx); + this._setShadow(ctx); + this.clipTo && fabric.util.clipContext(this, ctx); + this._transformDone = true; + // the array is now sorted in order of highest first, so start from end + for (var i = 0, len = this._objects.length; i < len; i++) { + this._renderObject(this._objects[i], ctx); + } + + this.clipTo && ctx.restore(); + ctx.restore(); + this._transformDone = false; + }, + + /** + * Renders controls and borders for the object + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} [noTransform] When true, context is not transformed + */ + _renderControls: function(ctx, noTransform) { + this.callSuper('_renderControls', ctx, noTransform); + for (var i = 0, len = this._objects.length; i < len; i++) { + this._objects[i]._renderControls(ctx); + } + }, + + /** + * @private + */ + _renderObject: function(object, ctx) { + // do not render if object is not visible + if (!object.visible) { + return; + } + + var originalHasRotatingPoint = object.hasRotatingPoint; + object.hasRotatingPoint = false; + object.render(ctx); + object.hasRotatingPoint = originalHasRotatingPoint; + }, + + /** + * Retores original state of each of group objects (original state is that which was before group was created). + * @private + * @return {fabric.Group} thisArg + * @chainable + */ + _restoreObjectsState: function() { + this._objects.forEach(this._restoreObjectState, this); + return this; + }, + + /** + * Realises the transform from this group onto the supplied object + * i.e. it tells you what would happen if the supplied object was in + * the group, and then the group was destroyed. It mutates the supplied + * object. + * @param {fabric.Object} object + * @return {fabric.Object} transformedObject + */ + realizeTransform: function(object) { + var matrix = object.calcTransformMatrix(), + options = fabric.util.qrDecompose(matrix), + center = new fabric.Point(options.translateX, options.translateY); + object.scaleX = options.scaleX; + object.scaleY = options.scaleY; + object.skewX = options.skewX; + object.skewY = options.skewY; + object.angle = options.angle; + object.flipX = false; + object.flipY = false; + object.setPositionByOrigin(center, 'center', 'center'); + return object; + }, + + /** + * Restores original state of a specified object in group + * @private + * @param {fabric.Object} object + * @return {fabric.Group} thisArg + */ + _restoreObjectState: function(object) { + this.realizeTransform(object); + object.setCoords(); + object.hasControls = object.__origHasControls; + delete object.__origHasControls; + object.set('active', false); + delete object.group; + + return this; + }, + + /** + * Destroys a group (restoring state of its objects) + * @return {fabric.Group} thisArg + * @chainable + */ + destroy: function() { + return this._restoreObjectsState(); + }, + + /** + * Saves coordinates of this instance (to be used together with `hasMoved`) + * @saveCoords + * @return {fabric.Group} thisArg + * @chainable + */ + saveCoords: function() { + this._originalLeft = this.get('left'); + this._originalTop = this.get('top'); + return this; + }, + + /** + * Checks whether this group was moved (since `saveCoords` was called last) + * @return {Boolean} true if an object was moved (since fabric.Group#saveCoords was called) + */ + hasMoved: function() { + return this._originalLeft !== this.get('left') || + this._originalTop !== this.get('top'); + }, + + /** + * Sets coordinates of all group objects + * @return {fabric.Group} thisArg + * @chainable + */ + setObjectsCoords: function() { + this.forEachObject(function(object) { + object.setCoords(); + }); + return this; + }, + + /** + * @private + */ + _calcBounds: function(onlyWidthHeight) { + var aX = [], + aY = [], + o, prop, + props = ['tr', 'br', 'bl', 'tl'], + i = 0, iLen = this._objects.length, + j, jLen = props.length; + + for ( ; i < iLen; ++i) { + o = this._objects[i]; + o.setCoords(); + for (j = 0; j < jLen; j++) { + prop = props[j]; + aX.push(o.oCoords[prop].x); + aY.push(o.oCoords[prop].y); + } + } + + this.set(this._getBounds(aX, aY, onlyWidthHeight)); + }, + + /** + * @private + */ + _getBounds: function(aX, aY, onlyWidthHeight) { + var ivt = fabric.util.invertTransform(this.getViewportTransform()), + minXY = fabric.util.transformPoint(new fabric.Point(min(aX), min(aY)), ivt), + maxXY = fabric.util.transformPoint(new fabric.Point(max(aX), max(aY)), ivt), + obj = { + width: (maxXY.x - minXY.x) || 0, + height: (maxXY.y - minXY.y) || 0 + }; + + if (!onlyWidthHeight) { + obj.left = minXY.x || 0; + obj.top = minXY.y || 0; + if (this.originX === 'center') { + obj.left += obj.width / 2; + } + if (this.originX === 'right') { + obj.left += obj.width; + } + if (this.originY === 'center') { + obj.top += obj.height / 2; + } + if (this.originY === 'bottom') { + obj.top += obj.height; + } + } + return obj; + }, + + /* _TO_SVG_START_ */ + /** + * Returns svg representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var markup = this._createBaseSVGMarkup(); + markup.push( + '\n' + ); + + for (var i = 0, len = this._objects.length; i < len; i++) { + markup.push('\t', this._objects[i].toSVG(reviver)); + } + + markup.push('\n'); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * Returns requested property + * @param {String} prop Property to get + * @return {*} + */ + get: function(prop) { + if (prop in _lockProperties) { + if (this[prop]) { + return this[prop]; + } + else { + for (var i = 0, len = this._objects.length; i < len; i++) { + if (this._objects[i][prop]) { + return true; + } + } + return false; + } + } + else { + if (prop in this.delegatedProperties) { + return this._objects[0] && this._objects[0].get(prop); + } + return this[prop]; + } + } + }); + + /** + * Returns {@link fabric.Group} instance from an object representation + * @static + * @memberOf fabric.Group + * @param {Object} object Object to create a group from + * @param {Function} [callback] Callback to invoke when an group instance is created + */ + fabric.Group.fromObject = function(object, callback) { + fabric.util.enlivenObjects(object.objects, function(enlivenedObjects) { + delete object.objects; + callback && callback(new fabric.Group(enlivenedObjects, object, true)); + }); + }; + + /** + * Indicates that instances of this type are async + * @static + * @memberOf fabric.Group + * @type Boolean + * @default + */ + fabric.Group.async = true; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var extend = fabric.util.object.extend; + + if (!global.fabric) { + global.fabric = { }; + } + + if (global.fabric.Image) { + fabric.warn('fabric.Image is already defined.'); + return; + } + + var stateProperties = fabric.Object.prototype.stateProperties.concat(); + stateProperties.push( + 'alignX', + 'alignY', + 'meetOrSlice' + ); + + /** + * Image class + * @class fabric.Image + * @extends fabric.Object + * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#images} + * @see {@link fabric.Image#initialize} for constructor definition + */ + fabric.Image = fabric.util.createClass(fabric.Object, /** @lends fabric.Image.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'image', + + /** + * crossOrigin value (one of "", "anonymous", "use-credentials") + * @see https://developer.mozilla.org/en-US/docs/HTML/CORS_settings_attributes + * @type String + * @default + */ + crossOrigin: '', + + /** + * AlignX value, part of preserveAspectRatio (one of "none", "mid", "min", "max") + * @see http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute + * This parameter defines how the picture is aligned to its viewport when image element width differs from image width. + * @type String + * @default + */ + alignX: 'none', + + /** + * AlignY value, part of preserveAspectRatio (one of "none", "mid", "min", "max") + * @see http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute + * This parameter defines how the picture is aligned to its viewport when image element height differs from image height. + * @type String + * @default + */ + alignY: 'none', + + /** + * meetOrSlice value, part of preserveAspectRatio (one of "meet", "slice"). + * if meet the image is always fully visibile, if slice the viewport is always filled with image. + * @see http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute + * @type String + * @default + */ + meetOrSlice: 'meet', + + /** + * Width of a stroke. + * For image quality a stroke multiple of 2 gives better results. + * @type Number + * @default + */ + strokeWidth: 0, + + /** + * private + * contains last value of scaleX to detect + * if the Image got resized after the last Render + * @type Number + */ + _lastScaleX: 1, + + /** + * private + * contains last value of scaleY to detect + * if the Image got resized after the last Render + * @type Number + */ + _lastScaleY: 1, + + /** + * minimum scale factor under which any resizeFilter is triggered to resize the image + * 0 will disable the automatic resize. 1 will trigger automatically always. + * number bigger than 1 can be used in case we want to scale with some filter above + * the natural image dimensions + * @type Number + */ + minimumScaleTrigger: 0.5, + + /** + * List of properties to consider when checking if + * state of an object is changed ({@link fabric.Object#hasStateChanged}) + * as well as for history (undo/redo) purposes + * @type Array + */ + stateProperties: stateProperties, + + /** + * Constructor + * @param {HTMLImageElement | String} element Image element + * @param {Object} [options] Options object + * @param {function} [callback] callback function to call after eventual filters applied. + * @return {fabric.Image} thisArg + */ + initialize: function(element, options, callback) { + options || (options = { }); + this.filters = []; + this.resizeFilters = []; + this.callSuper('initialize', options); + this._initElement(element, options, callback); + }, + + /** + * Returns image element which this instance if based on + * @return {HTMLImageElement} Image element + */ + getElement: function() { + return this._element; + }, + + /** + * Sets image element for this instance to a specified one. + * If filters defined they are applied to new image. + * You might need to call `canvas.renderAll` and `object.setCoords` after replacing, to render new image and update controls area. + * @param {HTMLImageElement} element + * @param {Function} [callback] Callback is invoked when all filters have been applied and new image is generated + * @param {Object} [options] Options object + * @return {fabric.Image} thisArg + * @chainable + */ + setElement: function(element, callback, options) { + + var _callback, _this; + + this._element = element; + this._originalElement = element; + this._initConfig(options); + + if (this.resizeFilters.length === 0) { + _callback = callback; + } + else { + _this = this; + _callback = function() { + _this.applyFilters(callback, _this.resizeFilters, _this._filteredEl || _this._originalElement, true); + }; + } + + if (this.filters.length !== 0) { + this.applyFilters(_callback); + } + else if (_callback) { + _callback(this); + } + + return this; + }, + + /** + * Sets crossOrigin value (on an instance and corresponding image element) + * @return {fabric.Image} thisArg + * @chainable + */ + setCrossOrigin: function(value) { + this.crossOrigin = value; + this._element.crossOrigin = value; + + return this; + }, + + /** + * Returns original size of an image + * @return {Object} Object with "width" and "height" properties + */ + getOriginalSize: function() { + var element = this.getElement(); + return { + width: element.width, + height: element.height + }; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _stroke: function(ctx) { + if (!this.stroke || this.strokeWidth === 0) { + return; + } + var w = this.width / 2, h = this.height / 2; + ctx.beginPath(); + ctx.moveTo(-w, -h); + ctx.lineTo(w, -h); + ctx.lineTo(w, h); + ctx.lineTo(-w, h); + ctx.lineTo(-w, -h); + ctx.closePath(); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderDashedStroke: function(ctx) { + var x = -this.width / 2, + y = -this.height / 2, + w = this.width, + h = this.height; + + ctx.save(); + this._setStrokeStyles(ctx); + + ctx.beginPath(); + fabric.util.drawDashedLine(ctx, x, y, x + w, y, this.strokeDashArray); + fabric.util.drawDashedLine(ctx, x + w, y, x + w, y + h, this.strokeDashArray); + fabric.util.drawDashedLine(ctx, x + w, y + h, x, y + h, this.strokeDashArray); + fabric.util.drawDashedLine(ctx, x, y + h, x, y, this.strokeDashArray); + ctx.closePath(); + ctx.restore(); + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} Object representation of an instance + */ + toObject: function(propertiesToInclude) { + var filters = [], resizeFilters = [], + scaleX = 1, scaleY = 1; + + this.filters.forEach(function(filterObj) { + if (filterObj) { + if (filterObj.type === 'Resize') { + scaleX *= filterObj.scaleX; + scaleY *= filterObj.scaleY; + } + filters.push(filterObj.toObject()); + } + }); + + this.resizeFilters.forEach(function(filterObj) { + filterObj && resizeFilters.push(filterObj.toObject()); + }); + var object = extend( + this.callSuper( + 'toObject', + ['crossOrigin', 'alignX', 'alignY', 'meetOrSlice'].concat(propertiesToInclude) + ), { + src: this.getSrc(), + filters: filters, + resizeFilters: resizeFilters, + }); + + object.width /= scaleX; + object.height /= scaleY; + + return object; + }, + + /* _TO_SVG_START_ */ + /** + * Returns SVG representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + var markup = this._createBaseSVGMarkup(), x = -this.width / 2, y = -this.height / 2, + preserveAspectRatio = 'none', filtered = true; + if (this.group && this.group.type === 'path-group') { + x = this.left; + y = this.top; + } + if (this.alignX !== 'none' && this.alignY !== 'none') { + preserveAspectRatio = 'x' + this.alignX + 'Y' + this.alignY + ' ' + this.meetOrSlice; + } + markup.push( + '\n', + '\n' + ); + + if (this.stroke || this.strokeDashArray) { + var origFill = this.fill; + this.fill = null; + markup.push( + '\n' + ); + this.fill = origFill; + } + + markup.push('\n'); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + /* _TO_SVG_END_ */ + + /** + * Returns source of an image + * @param {Boolean} filtered indicates if the src is needed for svg + * @return {String} Source of an image + */ + getSrc: function(filtered) { + var element = filtered ? this._element : this._originalElement; + if (element) { + return fabric.isLikelyNode ? element._src : element.src; + } + else { + return this.src || ''; + } + }, + + /** + * Sets source of an image + * @param {String} src Source string (URL) + * @param {Function} [callback] Callback is invoked when image has been loaded (and all filters have been applied) + * @param {Object} [options] Options object + * @return {fabric.Image} thisArg + * @chainable + */ + setSrc: function(src, callback, options) { + fabric.util.loadImage(src, function(img) { + return this.setElement(img, callback, options); + }, this, options && options.crossOrigin); + }, + + /** + * Returns string representation of an instance + * @return {String} String representation of an instance + */ + toString: function() { + return '#'; + }, + + /** + * Applies filters assigned to this image (from "filters" array) + * @method applyFilters + * @param {Function} callback Callback is invoked when all filters have been applied and new image is generated + * @param {Array} filters to be applied + * @param {fabric.Image} imgElement image to filter ( default to this._element ) + * @param {Boolean} forResizing + * @return {CanvasElement} canvasEl to be drawn immediately + * @chainable + */ + applyFilters: function(callback, filters, imgElement, forResizing) { + + filters = filters || this.filters; + imgElement = imgElement || this._originalElement; + + if (!imgElement) { + return; + } + + var replacement = fabric.util.createImage(), + retinaScaling = this.canvas ? this.canvas.getRetinaScaling() : fabric.devicePixelRatio, + minimumScale = this.minimumScaleTrigger / retinaScaling, + _this = this, scaleX, scaleY; + + if (filters.length === 0) { + this._element = imgElement; + callback && callback(this); + return imgElement; + } + + var canvasEl = fabric.util.createCanvasElement(); + canvasEl.width = imgElement.width; + canvasEl.height = imgElement.height; + canvasEl.getContext('2d').drawImage(imgElement, 0, 0, imgElement.width, imgElement.height); + + filters.forEach(function(filter) { + if (!filter) { + return; + } + if (forResizing) { + scaleX = _this.scaleX < minimumScale ? _this.scaleX : 1; + scaleY = _this.scaleY < minimumScale ? _this.scaleY : 1; + if (scaleX * retinaScaling < 1) { + scaleX *= retinaScaling; + } + if (scaleY * retinaScaling < 1) { + scaleY *= retinaScaling; + } + } + else { + scaleX = filter.scaleX; + scaleY = filter.scaleY; + } + filter.applyTo(canvasEl, scaleX, scaleY); + if (!forResizing && filter.type === 'Resize') { + _this.width *= filter.scaleX; + _this.height *= filter.scaleY; + } + }); + + /** @ignore */ + replacement.width = canvasEl.width; + replacement.height = canvasEl.height; + if (fabric.isLikelyNode) { + replacement.src = canvasEl.toBuffer(undefined, fabric.Image.pngCompression); + // onload doesn't fire in some node versions, so we invoke callback manually + _this._element = replacement; + !forResizing && (_this._filteredEl = replacement); + callback && callback(_this); + } + else { + replacement.onload = function() { + _this._element = replacement; + !forResizing && (_this._filteredEl = replacement); + callback && callback(_this); + replacement.onload = canvasEl = null; + }; + replacement.src = canvasEl.toDataURL('image/png'); + } + return canvasEl; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} noTransform + */ + _render: function(ctx, noTransform) { + var x, y, imageMargins = this._findMargins(), elementToDraw; + + x = (noTransform ? this.left : -this.width / 2); + y = (noTransform ? this.top : -this.height / 2); + + if (this.meetOrSlice === 'slice') { + ctx.beginPath(); + ctx.rect(x, y, this.width, this.height); + ctx.clip(); + } + + if (this.isMoving === false && this.resizeFilters.length && this._needsResize()) { + this._lastScaleX = this.scaleX; + this._lastScaleY = this.scaleY; + elementToDraw = this.applyFilters(null, this.resizeFilters, this._filteredEl || this._originalElement, true); + } + else { + elementToDraw = this._element; + } + elementToDraw && ctx.drawImage(elementToDraw, + x + imageMargins.marginX, + y + imageMargins.marginY, + imageMargins.width, + imageMargins.height + ); + + this._stroke(ctx); + this._renderStroke(ctx); + }, + + /** + * @private, needed to check if image needs resize + */ + _needsResize: function() { + return (this.scaleX !== this._lastScaleX || this.scaleY !== this._lastScaleY); + }, + + /** + * @private + */ + _findMargins: function() { + var width = this.width, height = this.height, scales, + scale, marginX = 0, marginY = 0; + + if (this.alignX !== 'none' || this.alignY !== 'none') { + scales = [this.width / this._element.width, this.height / this._element.height]; + scale = this.meetOrSlice === 'meet' + ? Math.min.apply(null, scales) : Math.max.apply(null, scales); + width = this._element.width * scale; + height = this._element.height * scale; + if (this.alignX === 'Mid') { + marginX = (this.width - width) / 2; + } + if (this.alignX === 'Max') { + marginX = this.width - width; + } + if (this.alignY === 'Mid') { + marginY = (this.height - height) / 2; + } + if (this.alignY === 'Max') { + marginY = this.height - height; + } + } + return { + width: width, + height: height, + marginX: marginX, + marginY: marginY + }; + }, + + /** + * @private + */ + _resetWidthHeight: function() { + var element = this.getElement(); + + this.set('width', element.width); + this.set('height', element.height); + }, + + /** + * The Image class's initialization method. This method is automatically + * called by the constructor. + * @private + * @param {HTMLImageElement|String} element The element representing the image + * @param {Object} [options] Options object + */ + _initElement: function(element, options, callback) { + this.setElement(fabric.util.getById(element), callback, options); + fabric.util.addClass(this.getElement(), fabric.Image.CSS_CANVAS); + }, + + /** + * @private + * @param {Object} [options] Options object + */ + _initConfig: function(options) { + options || (options = { }); + this.setOptions(options); + this._setWidthHeight(options); + if (this._element && this.crossOrigin) { + this._element.crossOrigin = this.crossOrigin; + } + }, + + /** + * @private + * @param {Array} filters to be initialized + * @param {Function} callback Callback to invoke when all fabric.Image.filters instances are created + */ + _initFilters: function(filters, callback) { + if (filters && filters.length) { + fabric.util.enlivenObjects(filters, function(enlivenedObjects) { + callback && callback(enlivenedObjects); + }, 'fabric.Image.filters'); + } + else { + callback && callback(); + } + }, + + /** + * @private + * @param {Object} [options] Object with width/height properties + */ + _setWidthHeight: function(options) { + this.width = 'width' in options + ? options.width + : (this.getElement() + ? this.getElement().width || 0 + : 0); + + this.height = 'height' in options + ? options.height + : (this.getElement() + ? this.getElement().height || 0 + : 0); + }, + + /** + * Returns complexity of an instance + * @return {Number} complexity of this instance + */ + complexity: function() { + return 1; + } + }); + + /** + * Default CSS class name for canvas + * @static + * @type String + * @default + */ + fabric.Image.CSS_CANVAS = 'canvas-img'; + + /** + * Alias for getSrc + * @static + */ + fabric.Image.prototype.getSvgSrc = fabric.Image.prototype.getSrc; + + /** + * Creates an instance of fabric.Image from its object representation + * @static + * @param {Object} object Object to create an instance from + * @param {Function} callback Callback to invoke when an image instance is created + */ + fabric.Image.fromObject = function(object, callback) { + fabric.util.loadImage(object.src, function(img) { + fabric.Image.prototype._initFilters.call(object, object.filters, function(filters) { + object.filters = filters || []; + fabric.Image.prototype._initFilters.call(object, object.resizeFilters, function(resizeFilters) { + object.resizeFilters = resizeFilters || []; + return new fabric.Image(img, object, callback); + }); + }); + }, null, object.crossOrigin); + }; + + /** + * Creates an instance of fabric.Image from an URL string + * @static + * @param {String} url URL to create an image from + * @param {Function} [callback] Callback to invoke when image is created (newly created image is passed as a first argument) + * @param {Object} [imgOptions] Options object + */ + fabric.Image.fromURL = function(url, callback, imgOptions) { + fabric.util.loadImage(url, function(img) { + callback && callback(new fabric.Image(img, imgOptions)); + }, null, imgOptions && imgOptions.crossOrigin); + }; + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by {@link fabric.Image.fromElement}) + * @static + * @see {@link http://www.w3.org/TR/SVG/struct.html#ImageElement} + */ + fabric.Image.ATTRIBUTE_NAMES = + fabric.SHARED_ATTRIBUTES.concat('x y width height preserveAspectRatio xlink:href'.split(' ')); + + /** + * Returns {@link fabric.Image} instance from an SVG element + * @static + * @param {SVGElement} element Element to parse + * @param {Function} callback Callback to execute when fabric.Image object is created + * @param {Object} [options] Options object + * @return {fabric.Image} Instance of fabric.Image + */ + fabric.Image.fromElement = function(element, callback, options) { + var parsedAttributes = fabric.parseAttributes(element, fabric.Image.ATTRIBUTE_NAMES), + preserveAR; + + if (parsedAttributes.preserveAspectRatio) { + preserveAR = fabric.util.parsePreserveAspectRatioAttribute(parsedAttributes.preserveAspectRatio); + extend(parsedAttributes, preserveAR); + } + + fabric.Image.fromURL(parsedAttributes['xlink:href'], callback, + extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes)); + }; + /* _FROM_SVG_END_ */ + + /** + * Indicates that instances of this type are async + * @static + * @type Boolean + * @default + */ + fabric.Image.async = true; + + /** + * Indicates compression level used when generating PNG under Node (in applyFilters). Any of 0-9 + * @static + * @type Number + * @default + */ + fabric.Image.pngCompression = 1; + +})(typeof exports !== 'undefined' ? exports : this); + + +fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ { + + /** + * @private + * @return {Number} angle value + */ + _getAngleValueForStraighten: function() { + var angle = this.getAngle() % 360; + if (angle > 0) { + return Math.round((angle - 1) / 90) * 90; + } + return Math.round(angle / 90) * 90; + }, + + /** + * Straightens an object (rotating it from current angle to one of 0, 90, 180, 270, etc. depending on which is closer) + * @return {fabric.Object} thisArg + * @chainable + */ + straighten: function() { + this.setAngle(this._getAngleValueForStraighten()); + return this; + }, + + /** + * Same as {@link fabric.Object.prototype.straighten} but with animation + * @param {Object} callbacks Object with callback functions + * @param {Function} [callbacks.onComplete] Invoked on completion + * @param {Function} [callbacks.onChange] Invoked on every step of animation + * @return {fabric.Object} thisArg + * @chainable + */ + fxStraighten: function(callbacks) { + callbacks = callbacks || { }; + + var empty = function() { }, + onComplete = callbacks.onComplete || empty, + onChange = callbacks.onChange || empty, + _this = this; + + fabric.util.animate({ + startValue: this.get('angle'), + endValue: this._getAngleValueForStraighten(), + duration: this.FX_DURATION, + onChange: function(value) { + _this.setAngle(value); + onChange(); + }, + onComplete: function() { + _this.setCoords(); + onComplete(); + }, + onStart: function() { + _this.set('active', false); + } + }); + + return this; + } +}); + +fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ { + + /** + * Straightens object, then rerenders canvas + * @param {fabric.Object} object Object to straighten + * @return {fabric.Canvas} thisArg + * @chainable + */ + straightenObject: function (object) { + object.straighten(); + this.renderAll(); + return this; + }, + + /** + * Same as {@link fabric.Canvas.prototype.straightenObject}, but animated + * @param {fabric.Object} object Object to straighten + * @return {fabric.Canvas} thisArg + * @chainable + */ + fxStraightenObject: function (object) { + object.fxStraighten({ + onChange: this.renderAll.bind(this) + }); + return this; + } +}); + + +/** + * @namespace fabric.Image.filters + * @memberOf fabric.Image + * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#image_filters} + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + */ +fabric.Image.filters = fabric.Image.filters || { }; + +/** + * Root filter class from which all filter classes inherit from + * @class fabric.Image.filters.BaseFilter + * @memberOf fabric.Image.filters + */ +fabric.Image.filters.BaseFilter = fabric.util.createClass(/** @lends fabric.Image.filters.BaseFilter.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'BaseFilter', + + /** + * Constructor + * @param {Object} [options] Options object + */ + initialize: function(options) { + if (options) { + this.setOptions(options); + } + }, + + /** + * Sets filter's properties from options + * @param {Object} [options] Options object + */ + setOptions: function(options) { + for (var prop in options) { + this[prop] = options[prop]; + } + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return { type: this.type }; + }, + + /** + * Returns a JSON representation of an instance + * @return {Object} JSON + */ + toJSON: function() { + // delegate, not alias + return this.toObject(); + } +}); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Brightness filter class + * @class fabric.Image.filters.Brightness + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.Brightness#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Brightness({ + * brightness: 200 + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Brightness = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Brightness.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Brightness', + + /** + * Constructor + * @memberOf fabric.Image.filters.Brightness.prototype + * @param {Object} [options] Options object + * @param {Number} [options.brightness=0] Value to brighten the image up (-255..255) + */ + initialize: function(options) { + options = options || { }; + this.brightness = options.brightness || 0; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + brightness = this.brightness; + + for (var i = 0, len = data.length; i < len; i += 4) { + data[i] += brightness; + data[i + 1] += brightness; + data[i + 2] += brightness; + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + brightness: this.brightness + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.Brightness} Instance of fabric.Image.filters.Brightness + */ + fabric.Image.filters.Brightness.fromObject = function(object) { + return new fabric.Image.filters.Brightness(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Adapted from html5rocks article + * @class fabric.Image.filters.Convolute + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.Convolute#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example Sharpen filter + * var filter = new fabric.Image.filters.Convolute({ + * matrix: [ 0, -1, 0, + * -1, 5, -1, + * 0, -1, 0 ] + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + * @example Blur filter + * var filter = new fabric.Image.filters.Convolute({ + * matrix: [ 1/9, 1/9, 1/9, + * 1/9, 1/9, 1/9, + * 1/9, 1/9, 1/9 ] + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + * @example Emboss filter + * var filter = new fabric.Image.filters.Convolute({ + * matrix: [ 1, 1, 1, + * 1, 0.7, -1, + * -1, -1, -1 ] + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + * @example Emboss filter with opaqueness + * var filter = new fabric.Image.filters.Convolute({ + * opaque: true, + * matrix: [ 1, 1, 1, + * 1, 0.7, -1, + * -1, -1, -1 ] + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Convolute = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Convolute.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Convolute', + + /** + * Constructor + * @memberOf fabric.Image.filters.Convolute.prototype + * @param {Object} [options] Options object + * @param {Boolean} [options.opaque=false] Opaque value (true/false) + * @param {Array} [options.matrix] Filter matrix + */ + initialize: function(options) { + options = options || { }; + + this.opaque = options.opaque; + this.matrix = options.matrix || [ + 0, 0, 0, + 0, 1, 0, + 0, 0, 0 + ]; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + + var weights = this.matrix, + context = canvasEl.getContext('2d'), + pixels = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + + side = Math.round(Math.sqrt(weights.length)), + halfSide = Math.floor(side / 2), + src = pixels.data, + sw = pixels.width, + sh = pixels.height, + output = context.createImageData(sw, sh), + dst = output.data, + // go through the destination image pixels + alphaFac = this.opaque ? 1 : 0, + r, g, b, a, dstOff, + scx, scy, srcOff, wt; + + for (var y = 0; y < sh; y++) { + for (var x = 0; x < sw; x++) { + dstOff = (y * sw + x) * 4; + // calculate the weighed sum of the source image pixels that + // fall under the convolution matrix + r = 0; g = 0; b = 0; a = 0; + + for (var cy = 0; cy < side; cy++) { + for (var cx = 0; cx < side; cx++) { + scy = y + cy - halfSide; + scx = x + cx - halfSide; + + // eslint-disable-next-line max-depth + if (scy < 0 || scy > sh || scx < 0 || scx > sw) { + continue; + } + + srcOff = (scy * sw + scx) * 4; + wt = weights[cy * side + cx]; + + r += src[srcOff] * wt; + g += src[srcOff + 1] * wt; + b += src[srcOff + 2] * wt; + a += src[srcOff + 3] * wt; + } + } + dst[dstOff] = r; + dst[dstOff + 1] = g; + dst[dstOff + 2] = b; + dst[dstOff + 3] = a + alphaFac * (255 - a); + } + } + + context.putImageData(output, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + opaque: this.opaque, + matrix: this.matrix + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.Convolute} Instance of fabric.Image.filters.Convolute + */ + fabric.Image.filters.Convolute.fromObject = function(object) { + return new fabric.Image.filters.Convolute(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * GradientTransparency filter class + * @class fabric.Image.filters.GradientTransparency + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.GradientTransparency#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.GradientTransparency({ + * threshold: 200 + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + // eslint-disable-next-line max-len + filters.GradientTransparency = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.GradientTransparency.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'GradientTransparency', + + /** + * Constructor + * @memberOf fabric.Image.filters.GradientTransparency.prototype + * @param {Object} [options] Options object + * @param {Number} [options.threshold=100] Threshold value + */ + initialize: function(options) { + options = options || { }; + this.threshold = options.threshold || 100; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + threshold = this.threshold, + total = data.length; + + for (var i = 0, len = data.length; i < len; i += 4) { + data[i + 3] = threshold + 255 * (total - i) / total; + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + threshold: this.threshold + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.GradientTransparency} Instance of fabric.Image.filters.GradientTransparency + */ + fabric.Image.filters.GradientTransparency.fromObject = function(object) { + return new fabric.Image.filters.GradientTransparency(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Grayscale image filter class + * @class fabric.Image.filters.Grayscale + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Grayscale(); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Grayscale = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Grayscale.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Grayscale', + + /** + * Applies filter to canvas element + * @memberOf fabric.Image.filters.Grayscale.prototype + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + len = imageData.width * imageData.height * 4, + index = 0, + average; + + while (index < len) { + average = (data[index] + data[index + 1] + data[index + 2]) / 3; + data[index] = average; + data[index + 1] = average; + data[index + 2] = average; + index += 4; + } + + context.putImageData(imageData, 0, 0); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @return {fabric.Image.filters.Grayscale} Instance of fabric.Image.filters.Grayscale + */ + fabric.Image.filters.Grayscale.fromObject = function() { + return new fabric.Image.filters.Grayscale(); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Invert filter class + * @class fabric.Image.filters.Invert + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Invert(); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Invert = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Invert.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Invert', + + /** + * Applies filter to canvas element + * @memberOf fabric.Image.filters.Invert.prototype + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + iLen = data.length, i; + + for (i = 0; i < iLen; i += 4) { + data[i] = 255 - data[i]; + data[i + 1] = 255 - data[i + 1]; + data[i + 2] = 255 - data[i + 2]; + } + + context.putImageData(imageData, 0, 0); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @return {fabric.Image.filters.Invert} Instance of fabric.Image.filters.Invert + */ + fabric.Image.filters.Invert.fromObject = function() { + return new fabric.Image.filters.Invert(); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Mask filter class + * See http://resources.aleph-1.com/mask/ + * @class fabric.Image.filters.Mask + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.Mask#initialize} for constructor definition + */ + filters.Mask = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Mask.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Mask', + + /** + * Constructor + * @memberOf fabric.Image.filters.Mask.prototype + * @param {Object} [options] Options object + * @param {fabric.Image} [options.mask] Mask image object + * @param {Number} [options.channel=0] Rgb channel (0, 1, 2 or 3) + */ + initialize: function(options) { + options = options || { }; + + this.mask = options.mask; + this.channel = [0, 1, 2, 3].indexOf(options.channel) > -1 ? options.channel : 0; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + if (!this.mask) { + return; + } + + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + maskEl = this.mask.getElement(), + maskCanvasEl = fabric.util.createCanvasElement(), + channel = this.channel, + i, + iLen = imageData.width * imageData.height * 4; + + maskCanvasEl.width = canvasEl.width; + maskCanvasEl.height = canvasEl.height; + + maskCanvasEl.getContext('2d').drawImage(maskEl, 0, 0, canvasEl.width, canvasEl.height); + + var maskImageData = maskCanvasEl.getContext('2d').getImageData(0, 0, canvasEl.width, canvasEl.height), + maskData = maskImageData.data; + + for (i = 0; i < iLen; i += 4) { + data[i + 3] = maskData[i + channel]; + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + mask: this.mask.toObject(), + channel: this.channel + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @param {Function} [callback] Callback to invoke when a mask filter instance is created + */ + fabric.Image.filters.Mask.fromObject = function(object, callback) { + fabric.util.loadImage(object.mask.src, function(img) { + object.mask = new fabric.Image(img, object.mask); + callback && callback(new fabric.Image.filters.Mask(object)); + }); + }; + + /** + * Indicates that instances of this type are async + * @static + * @type Boolean + * @default + */ + fabric.Image.filters.Mask.async = true; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Noise filter class + * @class fabric.Image.filters.Noise + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.Noise#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Noise({ + * noise: 700 + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Noise = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Noise.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Noise', + + /** + * Constructor + * @memberOf fabric.Image.filters.Noise.prototype + * @param {Object} [options] Options object + * @param {Number} [options.noise=0] Noise value + */ + initialize: function(options) { + options = options || { }; + this.noise = options.noise || 0; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + noise = this.noise, rand; + + for (var i = 0, len = data.length; i < len; i += 4) { + + rand = (0.5 - Math.random()) * noise; + + data[i] += rand; + data[i + 1] += rand; + data[i + 2] += rand; + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + noise: this.noise + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.Noise} Instance of fabric.Image.filters.Noise + */ + fabric.Image.filters.Noise.fromObject = function(object) { + return new fabric.Image.filters.Noise(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Pixelate filter class + * @class fabric.Image.filters.Pixelate + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.Pixelate#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Pixelate({ + * blocksize: 8 + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Pixelate = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Pixelate.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Pixelate', + + /** + * Constructor + * @memberOf fabric.Image.filters.Pixelate.prototype + * @param {Object} [options] Options object + * @param {Number} [options.blocksize=4] Blocksize for pixelate + */ + initialize: function(options) { + options = options || { }; + this.blocksize = options.blocksize || 4; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + iLen = imageData.height, + jLen = imageData.width, + index, i, j, r, g, b, a; + + for (i = 0; i < iLen; i += this.blocksize) { + for (j = 0; j < jLen; j += this.blocksize) { + + index = (i * 4) * jLen + (j * 4); + + r = data[index]; + g = data[index + 1]; + b = data[index + 2]; + a = data[index + 3]; + + /* + blocksize: 4 + + [1,x,x,x,1] + [x,x,x,x,1] + [x,x,x,x,1] + [x,x,x,x,1] + [1,1,1,1,1] + */ + + for (var _i = i, _ilen = i + this.blocksize; _i < _ilen; _i++) { + for (var _j = j, _jlen = j + this.blocksize; _j < _jlen; _j++) { + index = (_i * 4) * jLen + (_j * 4); + data[index] = r; + data[index + 1] = g; + data[index + 2] = b; + data[index + 3] = a; + } + } + } + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + blocksize: this.blocksize + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.Pixelate} Instance of fabric.Image.filters.Pixelate + */ + fabric.Image.filters.Pixelate.fromObject = function(object) { + return new fabric.Image.filters.Pixelate(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Remove white filter class + * @class fabric.Image.filters.RemoveWhite + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.RemoveWhite#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.RemoveWhite({ + * threshold: 40, + * distance: 140 + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.RemoveWhite = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.RemoveWhite.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'RemoveWhite', + + /** + * Constructor + * @memberOf fabric.Image.filters.RemoveWhite.prototype + * @param {Object} [options] Options object + * @param {Number} [options.threshold=30] Threshold value + * @param {Number} [options.distance=20] Distance value + */ + initialize: function(options) { + options = options || { }; + this.threshold = options.threshold || 30; + this.distance = options.distance || 20; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + threshold = this.threshold, + distance = this.distance, + limit = 255 - threshold, + abs = Math.abs, + r, g, b; + + for (var i = 0, len = data.length; i < len; i += 4) { + r = data[i]; + g = data[i + 1]; + b = data[i + 2]; + + if (r > limit && + g > limit && + b > limit && + abs(r - g) < distance && + abs(r - b) < distance && + abs(g - b) < distance + ) { + data[i + 3] = 0; + } + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + threshold: this.threshold, + distance: this.distance + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.RemoveWhite} Instance of fabric.Image.filters.RemoveWhite + */ + fabric.Image.filters.RemoveWhite.fromObject = function(object) { + return new fabric.Image.filters.RemoveWhite(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Sepia filter class + * @class fabric.Image.filters.Sepia + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Sepia(); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Sepia = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Sepia.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Sepia', + + /** + * Applies filter to canvas element + * @memberOf fabric.Image.filters.Sepia.prototype + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + iLen = data.length, i, avg; + + for (i = 0; i < iLen; i += 4) { + avg = 0.3 * data[i] + 0.59 * data[i + 1] + 0.11 * data[i + 2]; + data[i] = avg + 100; + data[i + 1] = avg + 50; + data[i + 2] = avg + 255; + } + + context.putImageData(imageData, 0, 0); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @return {fabric.Image.filters.Sepia} Instance of fabric.Image.filters.Sepia + */ + fabric.Image.filters.Sepia.fromObject = function() { + return new fabric.Image.filters.Sepia(); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Sepia2 filter class + * @class fabric.Image.filters.Sepia2 + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Sepia2(); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Sepia2 = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Sepia2.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Sepia2', + + /** + * Applies filter to canvas element + * @memberOf fabric.Image.filters.Sepia.prototype + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + iLen = data.length, i, r, g, b; + + for (i = 0; i < iLen; i += 4) { + r = data[i]; + g = data[i + 1]; + b = data[i + 2]; + + data[i] = (r * 0.393 + g * 0.769 + b * 0.189 ) / 1.351; + data[i + 1] = (r * 0.349 + g * 0.686 + b * 0.168 ) / 1.203; + data[i + 2] = (r * 0.272 + g * 0.534 + b * 0.131 ) / 2.140; + } + + context.putImageData(imageData, 0, 0); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @return {fabric.Image.filters.Sepia2} Instance of fabric.Image.filters.Sepia2 + */ + fabric.Image.filters.Sepia2.fromObject = function() { + return new fabric.Image.filters.Sepia2(); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Tint filter class + * Adapted from https://github.com/mezzoblue/PaintbrushJS + * @class fabric.Image.filters.Tint + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.Tint#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example Tint filter with hex color and opacity + * var filter = new fabric.Image.filters.Tint({ + * color: '#3513B0', + * opacity: 0.5 + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + * @example Tint filter with rgba color + * var filter = new fabric.Image.filters.Tint({ + * color: 'rgba(53, 21, 176, 0.5)' + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Tint = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Tint.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Tint', + + /** + * Constructor + * @memberOf fabric.Image.filters.Tint.prototype + * @param {Object} [options] Options object + * @param {String} [options.color=#000000] Color to tint the image with + * @param {Number} [options.opacity] Opacity value that controls the tint effect's transparency (0..1) + */ + initialize: function(options) { + options = options || { }; + + this.color = options.color || '#000000'; + this.opacity = typeof options.opacity !== 'undefined' + ? options.opacity + : new fabric.Color(this.color).getAlpha(); + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + iLen = data.length, i, + tintR, tintG, tintB, + r, g, b, alpha1, + source; + + source = new fabric.Color(this.color).getSource(); + + tintR = source[0] * this.opacity; + tintG = source[1] * this.opacity; + tintB = source[2] * this.opacity; + + alpha1 = 1 - this.opacity; + + for (i = 0; i < iLen; i += 4) { + r = data[i]; + g = data[i + 1]; + b = data[i + 2]; + + // alpha compositing + data[i] = tintR + r * alpha1; + data[i + 1] = tintG + g * alpha1; + data[i + 2] = tintB + b * alpha1; + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + color: this.color, + opacity: this.opacity + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.Tint} Instance of fabric.Image.filters.Tint + */ + fabric.Image.filters.Tint.fromObject = function(object) { + return new fabric.Image.filters.Tint(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Multiply filter class + * Adapted from http://www.laurenscorijn.com/articles/colormath-basics + * @class fabric.Image.filters.Multiply + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @example Multiply filter with hex color + * var filter = new fabric.Image.filters.Multiply({ + * color: '#F0F' + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + * @example Multiply filter with rgb color + * var filter = new fabric.Image.filters.Multiply({ + * color: 'rgb(53, 21, 176)' + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Multiply = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Multiply.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Multiply', + + /** + * Constructor + * @memberOf fabric.Image.filters.Multiply.prototype + * @param {Object} [options] Options object + * @param {String} [options.color=#000000] Color to multiply the image pixels with + */ + initialize: function(options) { + options = options || { }; + + this.color = options.color || '#000000'; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + iLen = data.length, i, + source; + + source = new fabric.Color(this.color).getSource(); + + for (i = 0; i < iLen; i += 4) { + data[i] *= source[0] / 255; + data[i + 1] *= source[1] / 255; + data[i + 2] *= source[2] / 255; + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + color: this.color + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.Multiply} Instance of fabric.Image.filters.Multiply + */ + fabric.Image.filters.Multiply.fromObject = function(object) { + return new fabric.Image.filters.Multiply(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + 'use strict'; + + var fabric = global.fabric, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Color Blend filter class + * @class fabric.Image.filter.Blend + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @example + * var filter = new fabric.Image.filters.Blend({ + * color: '#000', + * mode: 'multiply' + * }); + * + * var filter = new fabric.Image.filters.Blend({ + * image: fabricImageObject, + * mode: 'multiply', + * alpha: 0.5 + * }); + + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + + filters.Blend = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Blend.prototype */ { + type: 'Blend', + + initialize: function(options) { + options = options || {}; + this.color = options.color || '#000'; + this.image = options.image || false; + this.mode = options.mode || 'multiply'; + this.alpha = options.alpha || 1; + }, + + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + tr, tg, tb, + r, g, b, + _r, _g, _b, + source, + isImage = false; + + if (this.image) { + // Blend images + isImage = true; + + var _el = fabric.util.createCanvasElement(); + _el.width = this.image.width; + _el.height = this.image.height; + + var tmpCanvas = new fabric.StaticCanvas(_el); + tmpCanvas.add(this.image); + var context2 = tmpCanvas.getContext('2d'); + source = context2.getImageData(0, 0, tmpCanvas.width, tmpCanvas.height).data; + } + else { + // Blend color + source = new fabric.Color(this.color).getSource(); + + tr = source[0] * this.alpha; + tg = source[1] * this.alpha; + tb = source[2] * this.alpha; + } + + for (var i = 0, len = data.length; i < len; i += 4) { + + r = data[i]; + g = data[i + 1]; + b = data[i + 2]; + + if (isImage) { + tr = source[i] * this.alpha; + tg = source[i + 1] * this.alpha; + tb = source[i + 2] * this.alpha; + } + + switch (this.mode) { + case 'multiply': + data[i] = r * tr / 255; + data[i + 1] = g * tg / 255; + data[i + 2] = b * tb / 255; + break; + case 'screen': + data[i] = 1 - (1 - r) * (1 - tr); + data[i + 1] = 1 - (1 - g) * (1 - tg); + data[i + 2] = 1 - (1 - b) * (1 - tb); + break; + case 'add': + data[i] = Math.min(255, r + tr); + data[i + 1] = Math.min(255, g + tg); + data[i + 2] = Math.min(255, b + tb); + break; + case 'diff': + case 'difference': + data[i] = Math.abs(r - tr); + data[i + 1] = Math.abs(g - tg); + data[i + 2] = Math.abs(b - tb); + break; + case 'subtract': + _r = r - tr; + _g = g - tg; + _b = b - tb; + + data[i] = (_r < 0) ? 0 : _r; + data[i + 1] = (_g < 0) ? 0 : _g; + data[i + 2] = (_b < 0) ? 0 : _b; + break; + case 'darken': + data[i] = Math.min(r, tr); + data[i + 1] = Math.min(g, tg); + data[i + 2] = Math.min(b, tb); + break; + case 'lighten': + data[i] = Math.max(r, tr); + data[i + 1] = Math.max(g, tg); + data[i + 2] = Math.max(b, tb); + break; + } + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return { + color: this.color, + image: this.image, + mode: this.mode, + alpha: this.alpha + }; + } + }); + + fabric.Image.filters.Blend.fromObject = function(object) { + return new fabric.Image.filters.Blend(object); + }; +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), pow = Math.pow, floor = Math.floor, + sqrt = Math.sqrt, abs = Math.abs, max = Math.max, round = Math.round, sin = Math.sin, + ceil = Math.ceil, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Resize image filter class + * @class fabric.Image.filters.Resize + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Resize(); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Resize = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Resize.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Resize', + + /** + * Resize type + * @param {String} resizeType + * @default + */ + resizeType: 'hermite', + + /** + * Scale factor for resizing, x axis + * @param {Number} scaleX + * @default + */ + scaleX: 0, + + /** + * Scale factor for resizing, y axis + * @param {Number} scaleY + * @default + */ + scaleY: 0, + + /** + * LanczosLobes parameter for lanczos filter + * @param {Number} lanczosLobes + * @default + */ + lanczosLobes: 3, + + /** + * Applies filter to canvas element + * @memberOf fabric.Image.filters.Resize.prototype + * @param {Object} canvasEl Canvas element to apply filter to + * @param {Number} scaleX + * @param {Number} scaleY + */ + applyTo: function(canvasEl, scaleX, scaleY) { + if (scaleX === 1 && scaleY === 1) { + return; + } + + this.rcpScaleX = 1 / scaleX; + this.rcpScaleY = 1 / scaleY; + + var oW = canvasEl.width, oH = canvasEl.height, + dW = round(oW * scaleX), dH = round(oH * scaleY), + imageData; + + if (this.resizeType === 'sliceHack') { + imageData = this.sliceByTwo(canvasEl, oW, oH, dW, dH); + } + if (this.resizeType === 'hermite') { + imageData = this.hermiteFastResize(canvasEl, oW, oH, dW, dH); + } + if (this.resizeType === 'bilinear') { + imageData = this.bilinearFiltering(canvasEl, oW, oH, dW, dH); + } + if (this.resizeType === 'lanczos') { + imageData = this.lanczosResize(canvasEl, oW, oH, dW, dH); + } + canvasEl.width = dW; + canvasEl.height = dH; + canvasEl.getContext('2d').putImageData(imageData, 0, 0); + }, + + /** + * Filter sliceByTwo + * @param {Object} canvasEl Canvas element to apply filter to + * @param {Number} oW Original Width + * @param {Number} oH Original Height + * @param {Number} dW Destination Width + * @param {Number} dH Destination Height + * @returns {ImageData} + */ + sliceByTwo: function(canvasEl, oW, oH, dW, dH) { + var context = canvasEl.getContext('2d'), imageData, + multW = 0.5, multH = 0.5, signW = 1, signH = 1, + doneW = false, doneH = false, stepW = oW, stepH = oH, + tmpCanvas = fabric.util.createCanvasElement(), + tmpCtx = tmpCanvas.getContext('2d'); + dW = floor(dW); + dH = floor(dH); + tmpCanvas.width = max(dW, oW); + tmpCanvas.height = max(dH, oH); + + if (dW > oW) { + multW = 2; + signW = -1; + } + if (dH > oH) { + multH = 2; + signH = -1; + } + imageData = context.getImageData(0, 0, oW, oH); + canvasEl.width = max(dW, oW); + canvasEl.height = max(dH, oH); + context.putImageData(imageData, 0, 0); + + while (!doneW || !doneH) { + oW = stepW; + oH = stepH; + if (dW * signW < floor(stepW * multW * signW)) { + stepW = floor(stepW * multW); + } + else { + stepW = dW; + doneW = true; + } + if (dH * signH < floor(stepH * multH * signH)) { + stepH = floor(stepH * multH); + } + else { + stepH = dH; + doneH = true; + } + imageData = context.getImageData(0, 0, oW, oH); + tmpCtx.putImageData(imageData, 0, 0); + context.clearRect(0, 0, stepW, stepH); + context.drawImage(tmpCanvas, 0, 0, oW, oH, 0, 0, stepW, stepH); + } + return context.getImageData(0, 0, dW, dH); + }, + + /** + * Filter lanczosResize + * @param {Object} canvasEl Canvas element to apply filter to + * @param {Number} oW Original Width + * @param {Number} oH Original Height + * @param {Number} dW Destination Width + * @param {Number} dH Destination Height + * @returns {ImageData} + */ + lanczosResize: function(canvasEl, oW, oH, dW, dH) { + + function lanczosCreate(lobes) { + return function(x) { + if (x > lobes) { + return 0; + } + x *= Math.PI; + if (abs(x) < 1e-16) { + return 1; + } + var xx = x / lobes; + return sin(x) * sin(xx) / x / xx; + }; + } + + function process(u) { + var v, i, weight, idx, a, red, green, + blue, alpha, fX, fY; + center.x = (u + 0.5) * ratioX; + icenter.x = floor(center.x); + for (v = 0; v < dH; v++) { + center.y = (v + 0.5) * ratioY; + icenter.y = floor(center.y); + a = 0; red = 0; green = 0; blue = 0; alpha = 0; + for (i = icenter.x - range2X; i <= icenter.x + range2X; i++) { + if (i < 0 || i >= oW) { + continue; + } + fX = floor(1000 * abs(i - center.x)); + if (!cacheLanc[fX]) { + cacheLanc[fX] = { }; + } + for (var j = icenter.y - range2Y; j <= icenter.y + range2Y; j++) { + if (j < 0 || j >= oH) { + continue; + } + fY = floor(1000 * abs(j - center.y)); + if (!cacheLanc[fX][fY]) { + cacheLanc[fX][fY] = lanczos(sqrt(pow(fX * rcpRatioX, 2) + pow(fY * rcpRatioY, 2)) / 1000); + } + weight = cacheLanc[fX][fY]; + if (weight > 0) { + idx = (j * oW + i) * 4; + a += weight; + red += weight * srcData[idx]; + green += weight * srcData[idx + 1]; + blue += weight * srcData[idx + 2]; + alpha += weight * srcData[idx + 3]; + } + } + } + idx = (v * dW + u) * 4; + destData[idx] = red / a; + destData[idx + 1] = green / a; + destData[idx + 2] = blue / a; + destData[idx + 3] = alpha / a; + } + + if (++u < dW) { + return process(u); + } + else { + return destImg; + } + } + + var context = canvasEl.getContext('2d'), + srcImg = context.getImageData(0, 0, oW, oH), + destImg = context.getImageData(0, 0, dW, dH), + srcData = srcImg.data, destData = destImg.data, + lanczos = lanczosCreate(this.lanczosLobes), + ratioX = this.rcpScaleX, ratioY = this.rcpScaleY, + rcpRatioX = 2 / this.rcpScaleX, rcpRatioY = 2 / this.rcpScaleY, + range2X = ceil(ratioX * this.lanczosLobes / 2), + range2Y = ceil(ratioY * this.lanczosLobes / 2), + cacheLanc = { }, center = { }, icenter = { }; + + return process(0); + }, + + /** + * bilinearFiltering + * @param {Object} canvasEl Canvas element to apply filter to + * @param {Number} oW Original Width + * @param {Number} oH Original Height + * @param {Number} dW Destination Width + * @param {Number} dH Destination Height + * @returns {ImageData} + */ + bilinearFiltering: function(canvasEl, oW, oH, dW, dH) { + var a, b, c, d, x, y, i, j, xDiff, yDiff, chnl, + color, offset = 0, origPix, ratioX = this.rcpScaleX, + ratioY = this.rcpScaleY, context = canvasEl.getContext('2d'), + w4 = 4 * (oW - 1), img = context.getImageData(0, 0, oW, oH), + pixels = img.data, destImage = context.getImageData(0, 0, dW, dH), + destPixels = destImage.data; + for (i = 0; i < dH; i++) { + for (j = 0; j < dW; j++) { + x = floor(ratioX * j); + y = floor(ratioY * i); + xDiff = ratioX * j - x; + yDiff = ratioY * i - y; + origPix = 4 * (y * oW + x); + + for (chnl = 0; chnl < 4; chnl++) { + a = pixels[origPix + chnl]; + b = pixels[origPix + 4 + chnl]; + c = pixels[origPix + w4 + chnl]; + d = pixels[origPix + w4 + 4 + chnl]; + color = a * (1 - xDiff) * (1 - yDiff) + b * xDiff * (1 - yDiff) + + c * yDiff * (1 - xDiff) + d * xDiff * yDiff; + destPixels[offset++] = color; + } + } + } + return destImage; + }, + + /** + * hermiteFastResize + * @param {Object} canvasEl Canvas element to apply filter to + * @param {Number} oW Original Width + * @param {Number} oH Original Height + * @param {Number} dW Destination Width + * @param {Number} dH Destination Height + * @returns {ImageData} + */ + hermiteFastResize: function(canvasEl, oW, oH, dW, dH) { + var ratioW = this.rcpScaleX, ratioH = this.rcpScaleY, + ratioWHalf = ceil(ratioW / 2), + ratioHHalf = ceil(ratioH / 2), + context = canvasEl.getContext('2d'), + img = context.getImageData(0, 0, oW, oH), data = img.data, + img2 = context.getImageData(0, 0, dW, dH), data2 = img2.data; + for (var j = 0; j < dH; j++) { + for (var i = 0; i < dW; i++) { + var x2 = (i + j * dW) * 4, weight = 0, weights = 0, weightsAlpha = 0, + gxR = 0, gxG = 0, gxB = 0, gxA = 0, centerY = (j + 0.5) * ratioH; + for (var yy = floor(j * ratioH); yy < (j + 1) * ratioH; yy++) { + var dy = abs(centerY - (yy + 0.5)) / ratioHHalf, + centerX = (i + 0.5) * ratioW, w0 = dy * dy; + for (var xx = floor(i * ratioW); xx < (i + 1) * ratioW; xx++) { + var dx = abs(centerX - (xx + 0.5)) / ratioWHalf, + w = sqrt(w0 + dx * dx); + /* eslint-disable max-depth */ + if (w > 1 && w < -1) { + continue; + } + //hermite filter + weight = 2 * w * w * w - 3 * w * w + 1; + if (weight > 0) { + dx = 4 * (xx + yy * oW); + //alpha + gxA += weight * data[dx + 3]; + weightsAlpha += weight; + //colors + if (data[dx + 3] < 255) { + weight = weight * data[dx + 3] / 250; + } + gxR += weight * data[dx]; + gxG += weight * data[dx + 1]; + gxB += weight * data[dx + 2]; + weights += weight; + } + /* eslint-enable max-depth */ + } + } + data2[x2] = gxR / weights; + data2[x2 + 1] = gxG / weights; + data2[x2 + 2] = gxB / weights; + data2[x2 + 3] = gxA / weightsAlpha; + } + } + return img2; + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return { + type: this.type, + scaleX: this.scaleX, + scaleY: this.scaleY, + resizeType: this.resizeType, + lanczosLobes: this.lanczosLobes + }; + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @return {fabric.Image.filters.Resize} Instance of fabric.Image.filters.Resize + */ + fabric.Image.filters.Resize.fromObject = function(object) { + return new fabric.Image.filters.Resize(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Color Matrix filter class + * @class fabric.Image.filters.ColorMatrix + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.ColorMatrix#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @see {@Link http://www.webwasp.co.uk/tutorials/219/Color_Matrix_Filter.php} + * @see {@Link http://phoboslab.org/log/2013/11/fast-image-filters-with-webgl} + * @example Kodachrome filter + * var filter = new fabric.Image.filters.ColorMatrix({ + * matrix: [ + 1.1285582396593525, -0.3967382283601348, -0.03992559172921793, 0, 63.72958762196502, + -0.16404339962244616, 1.0835251566291304, -0.05498805115633132, 0, 24.732407896706203, + -0.16786010706155763, -0.5603416277695248, 1.6014850761964943, 0, 35.62982807460946, + 0, 0, 0, 1, 0 + ] + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.ColorMatrix = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.ColorMatrix.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'ColorMatrix', + + /** + * Constructor + * @memberOf fabric.Image.filters.ColorMatrix.prototype + * @param {Object} [options] Options object + * @param {Array} [options.matrix] Color Matrix to modify the image data with + */ + initialize: function( options ) { + options || ( options = {} ); + this.matrix = options.matrix || [ + 1, 0, 0, 0, 0, + 0, 1, 0, 0, 0, + 0, 0, 1, 0, 0, + 0, 0, 0, 1, 0 + ]; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function( canvasEl ) { + var context = canvasEl.getContext( '2d' ), + imageData = context.getImageData( 0, 0, canvasEl.width, canvasEl.height ), + data = imageData.data, + iLen = data.length, + i, + r, + g, + b, + a, + m = this.matrix; + + for ( i = 0; i < iLen; i += 4 ) { + r = data[ i ]; + g = data[ i + 1 ]; + b = data[ i + 2 ]; + a = data[ i + 3 ]; + + data[ i ] = r * m[ 0 ] + g * m[ 1 ] + b * m[ 2 ] + a * m[ 3 ] + m[ 4 ]; + data[ i + 1 ] = r * m[ 5 ] + g * m[ 6 ] + b * m[ 7 ] + a * m[ 8 ] + m[ 9 ]; + data[ i + 2 ] = r * m[ 10 ] + g * m[ 11 ] + b * m[ 12 ] + a * m[ 13 ] + m[ 14 ]; + data[ i + 3 ] = r * m[ 15 ] + g * m[ 16 ] + b * m[ 17 ] + a * m[ 18 ] + m[ 19 ]; + } + + context.putImageData( imageData, 0, 0 ); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + type: this.type, + matrix: this.matrix + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.ColorMatrix} Instance of fabric.Image.filters.ColorMatrix + */ + fabric.Image.filters.ColorMatrix.fromObject = function( object ) { + return new fabric.Image.filters.ColorMatrix( object ); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Contrast filter class + * @class fabric.Image.filters.Contrast + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.Contrast#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Contrast({ + * contrast: 40 + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Contrast = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Contrast.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Contrast', + + /** + * Constructor + * @memberOf fabric.Image.filters.Contrast.prototype + * @param {Object} [options] Options object + * @param {Number} [options.contrast=0] Value to contrast the image up (-255...255) + */ + initialize: function(options) { + options = options || { }; + this.contrast = options.contrast || 0; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + contrastF = 259 * (this.contrast + 255) / (255 * (259 - this.contrast)); + + for (var i = 0, len = data.length; i < len; i += 4) { + data[i] = contrastF * (data[i] - 128) + 128; + data[i + 1] = contrastF * (data[i + 1] - 128) + 128; + data[i + 2] = contrastF * (data[i + 2] - 128) + 128; + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + contrast: this.contrast + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.Contrast} Instance of fabric.Image.filters.Contrast + */ + fabric.Image.filters.Contrast.fromObject = function(object) { + return new fabric.Image.filters.Contrast(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + extend = fabric.util.object.extend, + filters = fabric.Image.filters, + createClass = fabric.util.createClass; + + /** + * Saturate filter class + * @class fabric.Image.filters.Saturate + * @memberOf fabric.Image.filters + * @extends fabric.Image.filters.BaseFilter + * @see {@link fabric.Image.filters.Saturate#initialize} for constructor definition + * @see {@link http://fabricjs.com/image-filters|ImageFilters demo} + * @example + * var filter = new fabric.Image.filters.Saturate({ + * saturate: 100 + * }); + * object.filters.push(filter); + * object.applyFilters(canvas.renderAll.bind(canvas)); + */ + filters.Saturate = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Saturate.prototype */ { + + /** + * Filter type + * @param {String} type + * @default + */ + type: 'Saturate', + + /** + * Constructor + * @memberOf fabric.Image.filters.Saturate.prototype + * @param {Object} [options] Options object + * @param {Number} [options.saturate=0] Value to saturate the image (-100...100) + */ + initialize: function(options) { + options = options || { }; + this.saturate = options.saturate || 0; + }, + + /** + * Applies filter to canvas element + * @param {Object} canvasEl Canvas element to apply filter to + */ + applyTo: function(canvasEl) { + var context = canvasEl.getContext('2d'), + imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height), + data = imageData.data, + max, adjust = -this.saturate * 0.01; + + for (var i = 0, len = data.length; i < len; i += 4) { + max = Math.max(data[i], data[i + 1], data[i + 2]); + data[i] += max !== data[i] ? (max - data[i]) * adjust : 0; + data[i + 1] += max !== data[i + 1] ? (max - data[i + 1]) * adjust : 0; + data[i + 2] += max !== data[i + 2] ? (max - data[i + 2]) * adjust : 0; + } + + context.putImageData(imageData, 0, 0); + }, + + /** + * Returns object representation of an instance + * @return {Object} Object representation of an instance + */ + toObject: function() { + return extend(this.callSuper('toObject'), { + saturate: this.saturate + }); + } + }); + + /** + * Returns filter instance from an object representation + * @static + * @param {Object} object Object to create an instance from + * @return {fabric.Image.filters.Saturate} Instance of fabric.Image.filters.Saturate + */ + fabric.Image.filters.Saturate.fromObject = function(object) { + return new fabric.Image.filters.Saturate(object); + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = { }), + clone = fabric.util.object.clone, + toFixed = fabric.util.toFixed, + NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS, + MIN_TEXT_WIDTH = 2; + + if (fabric.Text) { + fabric.warn('fabric.Text is already defined'); + return; + } + + var stateProperties = fabric.Object.prototype.stateProperties.concat(); + stateProperties.push( + 'fontFamily', + 'fontWeight', + 'fontSize', + 'text', + 'textDecoration', + 'textAlign', + 'fontStyle', + 'lineHeight', + 'textBackgroundColor' + ); + + /** + * Text class + * @class fabric.Text + * @extends fabric.Object + * @return {fabric.Text} thisArg + * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#text} + * @see {@link fabric.Text#initialize} for constructor definition + */ + fabric.Text = fabric.util.createClass(fabric.Object, /** @lends fabric.Text.prototype */ { + + /** + * Properties which when set cause object to change dimensions + * @type Object + * @private + */ + _dimensionAffectingProps: { + fontSize: true, + fontWeight: true, + fontFamily: true, + fontStyle: true, + lineHeight: true, + text: true, + charSpacing: true, + textAlign: true, + strokeWidth: false, + }, + + /** + * @private + */ + _reNewline: /\r?\n/, + + /** + * Use this regular expression to filter for whitespace that is not a new line. + * Mostly used when text is 'justify' aligned. + * @private + */ + _reSpacesAndTabs: /[ \t\r]+/g, + + /** + * Retrieves object's fontSize + * @method getFontSize + * @memberOf fabric.Text.prototype + * @return {String} Font size (in pixels) + */ + + /** + * Sets object's fontSize + * Does not update the object .width and .height, + * call ._initDimensions() to update the values. + * @method setFontSize + * @memberOf fabric.Text.prototype + * @param {Number} fontSize Font size (in pixels) + * @return {fabric.Text} + * @chainable + */ + + /** + * Retrieves object's fontWeight + * @method getFontWeight + * @memberOf fabric.Text.prototype + * @return {(String|Number)} Font weight + */ + + /** + * Sets object's fontWeight + * Does not update the object .width and .height, + * call ._initDimensions() to update the values. + * @method setFontWeight + * @memberOf fabric.Text.prototype + * @param {(Number|String)} fontWeight Font weight + * @return {fabric.Text} + * @chainable + */ + + /** + * Retrieves object's fontFamily + * @method getFontFamily + * @memberOf fabric.Text.prototype + * @return {String} Font family + */ + + /** + * Sets object's fontFamily + * Does not update the object .width and .height, + * call ._initDimensions() to update the values. + * @method setFontFamily + * @memberOf fabric.Text.prototype + * @param {String} fontFamily Font family + * @return {fabric.Text} + * @chainable + */ + + /** + * Retrieves object's text + * @method getText + * @memberOf fabric.Text.prototype + * @return {String} text + */ + + /** + * Sets object's text + * Does not update the object .width and .height, + * call ._initDimensions() to update the values. + * @method setText + * @memberOf fabric.Text.prototype + * @param {String} text Text + * @return {fabric.Text} + * @chainable + */ + + /** + * Retrieves object's textDecoration + * @method getTextDecoration + * @memberOf fabric.Text.prototype + * @return {String} Text decoration + */ + + /** + * Sets object's textDecoration + * @method setTextDecoration + * @memberOf fabric.Text.prototype + * @param {String} textDecoration Text decoration + * @return {fabric.Text} + * @chainable + */ + + /** + * Retrieves object's fontStyle + * @method getFontStyle + * @memberOf fabric.Text.prototype + * @return {String} Font style + */ + + /** + * Sets object's fontStyle + * Does not update the object .width and .height, + * call ._initDimensions() to update the values. + * @method setFontStyle + * @memberOf fabric.Text.prototype + * @param {String} fontStyle Font style + * @return {fabric.Text} + * @chainable + */ + + /** + * Retrieves object's lineHeight + * @method getLineHeight + * @memberOf fabric.Text.prototype + * @return {Number} Line height + */ + + /** + * Sets object's lineHeight + * @method setLineHeight + * @memberOf fabric.Text.prototype + * @param {Number} lineHeight Line height + * @return {fabric.Text} + * @chainable + */ + + /** + * Retrieves object's textAlign + * @method getTextAlign + * @memberOf fabric.Text.prototype + * @return {String} Text alignment + */ + + /** + * Sets object's textAlign + * @method setTextAlign + * @memberOf fabric.Text.prototype + * @param {String} textAlign Text alignment + * @return {fabric.Text} + * @chainable + */ + + /** + * Retrieves object's textBackgroundColor + * @method getTextBackgroundColor + * @memberOf fabric.Text.prototype + * @return {String} Text background color + */ + + /** + * Sets object's textBackgroundColor + * @method setTextBackgroundColor + * @memberOf fabric.Text.prototype + * @param {String} textBackgroundColor Text background color + * @return {fabric.Text} + * @chainable + */ + + /** + * Type of an object + * @type String + * @default + */ + type: 'text', + + /** + * Font size (in pixels) + * @type Number + * @default + */ + fontSize: 40, + + /** + * Font weight (e.g. bold, normal, 400, 600, 800) + * @type {(Number|String)} + * @default + */ + fontWeight: 'normal', + + /** + * Font family + * @type String + * @default + */ + fontFamily: 'Times New Roman', + + /** + * Text decoration Possible values: "", "underline", "overline" or "line-through". + * @type String + * @default + */ + textDecoration: '', + + /** + * Text alignment. Possible values: "left", "center", "right" or "justify". + * @type String + * @default + */ + textAlign: 'left', + + /** + * Font style . Possible values: "", "normal", "italic" or "oblique". + * @type String + * @default + */ + fontStyle: '', + + /** + * Line height + * @type Number + * @default + */ + lineHeight: 1.16, + + /** + * Background color of text lines + * @type String + * @default + */ + textBackgroundColor: '', + + /** + * List of properties to consider when checking if + * state of an object is changed ({@link fabric.Object#hasStateChanged}) + * as well as for history (undo/redo) purposes + * @type Array + */ + stateProperties: stateProperties, + + /** + * When defined, an object is rendered via stroke and this property specifies its color. + * Backwards incompatibility note: This property was named "strokeStyle" until v1.1.6 + * @type String + * @default + */ + stroke: null, + + /** + * Shadow object representing shadow of this shape. + * Backwards incompatibility note: This property was named "textShadow" (String) until v1.2.11 + * @type fabric.Shadow + * @default + */ + shadow: null, + + /** + * @private + */ + _fontSizeFraction: 0.25, + + /** + * Text Line proportion to font Size (in pixels) + * @type Number + * @default + */ + _fontSizeMult: 1.13, + + /** + * additional space between characters + * expressed in thousands of em unit + * @type Number + * @default + */ + charSpacing: 0, + + /** + * Constructor + * @param {String} text Text string + * @param {Object} [options] Options object + * @return {fabric.Text} thisArg + */ + initialize: function(text, options) { + options = options || { }; + this.text = text; + this.__skipDimension = true; + this.setOptions(options); + this.__skipDimension = false; + this._initDimensions(); + }, + + /** + * Initialize text dimensions. Render all text on given context + * or on a offscreen canvas to get the text width with measureText. + * Updates this.width and this.height with the proper values. + * Does not return dimensions. + * @param {CanvasRenderingContext2D} [ctx] Context to render on + * @private + */ + _initDimensions: function(ctx) { + if (this.__skipDimension) { + return; + } + if (!ctx) { + ctx = fabric.util.createCanvasElement().getContext('2d'); + this._setTextStyles(ctx); + } + this._textLines = this._splitTextIntoLines(); + this._clearCache(); + this.width = this._getTextWidth(ctx) || this.cursorWidth || MIN_TEXT_WIDTH; + this.height = this._getTextHeight(ctx); + }, + + /** + * Returns string representation of an instance + * @return {String} String representation of text object + */ + toString: function() { + return '#'; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _render: function(ctx) { + this.clipTo && fabric.util.clipContext(this, ctx); + this._setOpacity(ctx); + this._setShadow(ctx); + this._setupCompositeOperation(ctx); + this._renderTextBackground(ctx); + this._setStrokeStyles(ctx); + this._setFillStyles(ctx); + this._renderText(ctx); + this._renderTextDecoration(ctx); + this.clipTo && ctx.restore(); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderText: function(ctx) { + this._renderTextFill(ctx); + this._renderTextStroke(ctx); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _setTextStyles: function(ctx) { + ctx.textBaseline = 'alphabetic'; + ctx.font = this._getFontDeclaration(); + }, + + /** + * @private + * @return {Number} Height of fabric.Text object + */ + _getTextHeight: function() { + return this._getHeightOfSingleLine() + (this._textLines.length - 1) * this._getHeightOfLine(); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @return {Number} Maximum width of fabric.Text object + */ + _getTextWidth: function(ctx) { + var maxWidth = this._getLineWidth(ctx, 0); + + for (var i = 1, len = this._textLines.length; i < len; i++) { + var currentLineWidth = this._getLineWidth(ctx, i); + if (currentLineWidth > maxWidth) { + maxWidth = currentLineWidth; + } + } + return maxWidth; + }, + + /* + * Calculate object dimensions from its properties + * @override + * @private + */ + _getNonTransformedDimensions: function() { + return { x: this.width, y: this.height }; + }, + + /** + * @private + * @param {String} method Method name ("fillText" or "strokeText") + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} chars Chars to render + * @param {Number} left Left position of text + * @param {Number} top Top position of text + */ + _renderChars: function(method, ctx, chars, left, top) { + // remove Text word from method var + var shortM = method.slice(0, -4), char, width; + if (this[shortM].toLive) { + var offsetX = -this.width / 2 + this[shortM].offsetX || 0, + offsetY = -this.height / 2 + this[shortM].offsetY || 0; + ctx.save(); + ctx.translate(offsetX, offsetY); + left -= offsetX; + top -= offsetY; + } + if (this.charSpacing !== 0) { + var additionalSpace = this._getWidthOfCharSpacing(); + chars = chars.split(''); + for (var i = 0, len = chars.length; i < len; i++) { + char = chars[i]; + width = ctx.measureText(char).width + additionalSpace; + ctx[method](char, left, top); + left += width > 0 ? width : 0; + } + } + else { + ctx[method](chars, left, top); + } + this[shortM].toLive && ctx.restore(); + }, + + /** + * @private + * @param {String} method Method name ("fillText" or "strokeText") + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} line Text to render + * @param {Number} left Left position of text + * @param {Number} top Top position of text + * @param {Number} lineIndex Index of a line in a text + */ + _renderTextLine: function(method, ctx, line, left, top, lineIndex) { + // lift the line by quarter of fontSize + top -= this.fontSize * this._fontSizeFraction; + + // short-circuit + var lineWidth = this._getLineWidth(ctx, lineIndex); + if (this.textAlign !== 'justify' || this.width < lineWidth) { + this._renderChars(method, ctx, line, left, top, lineIndex); + return; + } + + // stretch the line + var words = line.split(/\s+/), + charOffset = 0, + wordsWidth = this._getWidthOfWords(ctx, words.join(' '), lineIndex, 0), + widthDiff = this.width - wordsWidth, + numSpaces = words.length - 1, + spaceWidth = numSpaces > 0 ? widthDiff / numSpaces : 0, + leftOffset = 0, word; + + for (var i = 0, len = words.length; i < len; i++) { + while (line[charOffset] === ' ' && charOffset < line.length) { + charOffset++; + } + word = words[i]; + this._renderChars(method, ctx, word, left + leftOffset, top, lineIndex, charOffset); + leftOffset += this._getWidthOfWords(ctx, word, lineIndex, charOffset) + spaceWidth; + charOffset += word.length; + } + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} word + */ + _getWidthOfWords: function (ctx, word) { + var width = ctx.measureText(word).width, charCount, additionalSpace; + if (this.charSpacing !== 0) { + charCount = word.split('').length; + additionalSpace = charCount * this._getWidthOfCharSpacing(); + width += additionalSpace; + } + return width > 0 ? width : 0; + }, + + /** + * @private + * @return {Number} Left offset + */ + _getLeftOffset: function() { + return -this.width / 2; + }, + + /** + * @private + * @return {Number} Top offset + */ + _getTopOffset: function() { + return -this.height / 2; + }, + + /** + * Returns true because text has no style + */ + isEmptyStyles: function() { + return true; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} method Method name ("fillText" or "strokeText") + */ + _renderTextCommon: function(ctx, method) { + + var lineHeights = 0, left = this._getLeftOffset(), top = this._getTopOffset(); + + for (var i = 0, len = this._textLines.length; i < len; i++) { + var heightOfLine = this._getHeightOfLine(ctx, i), + maxHeight = heightOfLine / this.lineHeight, + lineWidth = this._getLineWidth(ctx, i), + leftOffset = this._getLineLeftOffset(lineWidth); + this._renderTextLine( + method, + ctx, + this._textLines[i], + left + leftOffset, + top + lineHeights + maxHeight, + i + ); + lineHeights += heightOfLine; + } + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderTextFill: function(ctx) { + if (!this.fill && this.isEmptyStyles()) { + return; + } + + this._renderTextCommon(ctx, 'fillText'); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderTextStroke: function(ctx) { + if ((!this.stroke || this.strokeWidth === 0) && this.isEmptyStyles()) { + return; + } + + if (this.shadow && !this.shadow.affectStroke) { + this._removeShadow(ctx); + } + + ctx.save(); + this._setLineDash(ctx, this.strokedashArray); + ctx.beginPath(); + this._renderTextCommon(ctx, 'strokeText'); + ctx.closePath(); + ctx.restore(); + }, + + /** + * @private + * @return {Number} height of line + */ + _getHeightOfLine: function() { + return this._getHeightOfSingleLine() * this.lineHeight; + }, + + /** + * @private + * @return {Number} height of line without lineHeight + */ + _getHeightOfSingleLine: function() { + return this.fontSize * this._fontSizeMult; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderTextBackground: function(ctx) { + this._renderBackground(ctx); + this._renderTextLinesBackground(ctx); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderTextLinesBackground: function(ctx) { + if (!this.textBackgroundColor) { + return; + } + var lineTopOffset = 0, heightOfLine, + lineWidth, lineLeftOffset; + + ctx.fillStyle = this.textBackgroundColor; + for (var i = 0, len = this._textLines.length; i < len; i++) { + heightOfLine = this._getHeightOfLine(ctx, i); + lineWidth = this._getLineWidth(ctx, i); + if (lineWidth > 0) { + lineLeftOffset = this._getLineLeftOffset(lineWidth); + ctx.fillRect( + this._getLeftOffset() + lineLeftOffset, + this._getTopOffset() + lineTopOffset, + lineWidth, + heightOfLine / this.lineHeight + ); + } + lineTopOffset += heightOfLine; + } + // if there is text background color no + // other shadows should be casted + this._removeShadow(ctx); + }, + + /** + * @private + * @param {Number} lineWidth Width of text line + * @return {Number} Line left offset + */ + _getLineLeftOffset: function(lineWidth) { + if (this.textAlign === 'center') { + return (this.width - lineWidth) / 2; + } + if (this.textAlign === 'right') { + return this.width - lineWidth; + } + return 0; + }, + + /** + * @private + */ + _clearCache: function() { + this.__lineWidths = []; + this.__lineHeights = []; + }, + + /** + * @private + */ + _shouldClearCache: function() { + var shouldClear = false; + if (this._forceClearCache) { + this._forceClearCache = false; + return true; + } + for (var prop in this._dimensionAffectingProps) { + if (this['__' + prop] !== this[prop]) { + this['__' + prop] = this[prop]; + shouldClear = true; + } + } + return shouldClear; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Number} lineIndex line number + * @return {Number} Line width + */ + _getLineWidth: function(ctx, lineIndex) { + if (this.__lineWidths[lineIndex]) { + return this.__lineWidths[lineIndex] === -1 ? this.width : this.__lineWidths[lineIndex]; + } + + var width, wordCount, line = this._textLines[lineIndex]; + + if (line === '') { + width = 0; + } + else { + width = this._measureLine(ctx, lineIndex); + } + this.__lineWidths[lineIndex] = width; + + if (width && this.textAlign === 'justify') { + wordCount = line.split(/\s+/); + if (wordCount.length > 1) { + this.__lineWidths[lineIndex] = -1; + } + } + return width; + }, + + _getWidthOfCharSpacing: function() { + if (this.charSpacing !== 0) { + return this.fontSize * this.charSpacing / 1000; + } + return 0; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Number} lineIndex line number + * @return {Number} Line width + */ + _measureLine: function(ctx, lineIndex) { + var line = this._textLines[lineIndex], + width = ctx.measureText(line).width, + additionalSpace = 0, charCount, finalWidth; + if (this.charSpacing !== 0) { + charCount = line.split('').length; + additionalSpace = (charCount - 1) * this._getWidthOfCharSpacing(); + } + finalWidth = width + additionalSpace; + return finalWidth > 0 ? finalWidth : 0; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderTextDecoration: function(ctx) { + if (!this.textDecoration) { + return; + } + var halfOfVerticalBox = this.height / 2, + _this = this, offsets = []; + + /** @ignore */ + function renderLinesAtOffset(offsets) { + var i, lineHeight = 0, len, j, oLen, lineWidth, + lineLeftOffset, heightOfLine; + + for (i = 0, len = _this._textLines.length; i < len; i++) { + + lineWidth = _this._getLineWidth(ctx, i); + lineLeftOffset = _this._getLineLeftOffset(lineWidth); + heightOfLine = _this._getHeightOfLine(ctx, i); + + for (j = 0, oLen = offsets.length; j < oLen; j++) { + ctx.fillRect( + _this._getLeftOffset() + lineLeftOffset, + lineHeight + (_this._fontSizeMult - 1 + offsets[j] ) * _this.fontSize - halfOfVerticalBox, + lineWidth, + _this.fontSize / 15); + } + lineHeight += heightOfLine; + } + } + + if (this.textDecoration.indexOf('underline') > -1) { + offsets.push(0.85); // 1 - 3/16 + } + if (this.textDecoration.indexOf('line-through') > -1) { + offsets.push(0.43); + } + if (this.textDecoration.indexOf('overline') > -1) { + offsets.push(-0.12); + } + if (offsets.length > 0) { + renderLinesAtOffset(offsets); + } + }, + + /** + * return font declaration string for canvas context + * @returns {String} font declaration formatted for canvas context. + */ + _getFontDeclaration: function() { + return [ + // node-canvas needs "weight style", while browsers need "style weight" + (fabric.isLikelyNode ? this.fontWeight : this.fontStyle), + (fabric.isLikelyNode ? this.fontStyle : this.fontWeight), + this.fontSize + 'px', + (fabric.isLikelyNode ? ('"' + this.fontFamily + '"') : this.fontFamily) + ].join(' '); + }, + + /** + * Renders text instance on a specified context + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} noTransform + */ + render: function(ctx, noTransform) { + // do not render if object is not visible + if (!this.visible) { + return; + } + + ctx.save(); + this._setTextStyles(ctx); + + if (this._shouldClearCache()) { + this._initDimensions(ctx); + } + this.drawSelectionBackground(ctx); + if (!noTransform) { + this.transform(ctx); + } + if (this.transformMatrix) { + ctx.transform.apply(ctx, this.transformMatrix); + } + if (this.group && this.group.type === 'path-group') { + ctx.translate(this.left, this.top); + } + this._render(ctx); + ctx.restore(); + }, + + /** + * Returns the text as an array of lines. + * @returns {Array} Lines in the text + */ + _splitTextIntoLines: function() { + return this.text.split(this._reNewline); + }, + + /** + * Returns object representation of an instance + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} Object representation of an instance + */ + toObject: function(propertiesToInclude) { + var additionalProperties = [ + 'text', + 'fontSize', + 'fontWeight', + 'fontFamily', + 'fontStyle', + 'lineHeight', + 'textDecoration', + 'textAlign', + 'textBackgroundColor', + 'charSpacing' + ].concat(propertiesToInclude); + return this.callSuper('toObject', additionalProperties); + }, + + /* _TO_SVG_START_ */ + /** + * Returns SVG representation of an instance + * @param {Function} [reviver] Method for further parsing of svg representation. + * @return {String} svg representation of an instance + */ + toSVG: function(reviver) { + if (!this.ctx) { + this.ctx = fabric.util.createCanvasElement().getContext('2d'); + } + var markup = this._createBaseSVGMarkup(), + offsets = this._getSVGLeftTopOffsets(this.ctx), + textAndBg = this._getSVGTextAndBg(offsets.textTop, offsets.textLeft); + this._wrapSVGTextAndBg(markup, textAndBg); + + return reviver ? reviver(markup.join('')) : markup.join(''); + }, + + /** + * @private + */ + _getSVGLeftTopOffsets: function(ctx) { + var lineTop = this._getHeightOfLine(ctx, 0), + textLeft = -this.width / 2, + textTop = 0; + + return { + textLeft: textLeft + (this.group && this.group.type === 'path-group' ? this.left : 0), + textTop: textTop + (this.group && this.group.type === 'path-group' ? -this.top : 0), + lineTop: lineTop + }; + }, + + /** + * @private + */ + _wrapSVGTextAndBg: function(markup, textAndBg) { + var noShadow = true, filter = this.getSvgFilter(), + style = filter === '' ? '' : ' style="' + filter + '"'; + + markup.push( + '\t\n', + textAndBg.textBgRects.join(''), + '\t\t\n', + textAndBg.textSpans.join(''), + '\t\t\n', + '\t\n' + ); + }, + + /** + * @private + * @param {Number} textTopOffset Text top offset + * @param {Number} textLeftOffset Text left offset + * @return {Object} + */ + _getSVGTextAndBg: function(textTopOffset, textLeftOffset) { + var textSpans = [], + textBgRects = [], + height = 0; + // bounding-box background + this._setSVGBg(textBgRects); + + // text and text-background + for (var i = 0, len = this._textLines.length; i < len; i++) { + if (this.textBackgroundColor) { + this._setSVGTextLineBg(textBgRects, i, textLeftOffset, textTopOffset, height); + } + this._setSVGTextLineText(i, textSpans, height, textLeftOffset, textTopOffset, textBgRects); + height += this._getHeightOfLine(this.ctx, i); + } + + return { + textSpans: textSpans, + textBgRects: textBgRects + }; + }, + + _setSVGTextLineText: function(i, textSpans, height, textLeftOffset, textTopOffset) { + var yPos = this.fontSize * (this._fontSizeMult - this._fontSizeFraction) + - textTopOffset + height - this.height / 2; + if (this.textAlign === 'justify') { + // i call from here to do not intefere with IText + this._setSVGTextLineJustifed(i, textSpans, yPos, textLeftOffset); + return; + } + textSpans.push( + '\t\t\t elements since setting opacity + // on containing one doesn't work in Illustrator + this._getFillAttributes(this.fill), '>', + fabric.util.string.escapeXml(this._textLines[i]), + '\n' + ); + }, + + _setSVGTextLineJustifed: function(i, textSpans, yPos, textLeftOffset) { + var ctx = fabric.util.createCanvasElement().getContext('2d'); + + this._setTextStyles(ctx); + + var line = this._textLines[i], + words = line.split(/\s+/), + wordsWidth = this._getWidthOfWords(ctx, words.join('')), + widthDiff = this.width - wordsWidth, + numSpaces = words.length - 1, + spaceWidth = numSpaces > 0 ? widthDiff / numSpaces : 0, + word, attributes = this._getFillAttributes(this.fill), + len; + + textLeftOffset += this._getLineLeftOffset(this._getLineWidth(ctx, i)); + + for (i = 0, len = words.length; i < len; i++) { + word = words[i]; + textSpans.push( + '\t\t\t elements since setting opacity + // on containing one doesn't work in Illustrator + attributes, '>', + fabric.util.string.escapeXml(word), + '\n' + ); + textLeftOffset += this._getWidthOfWords(ctx, word) + spaceWidth; + } + }, + + _setSVGTextLineBg: function(textBgRects, i, textLeftOffset, textTopOffset, height) { + textBgRects.push( + '\t\t\n'); + }, + + _setSVGBg: function(textBgRects) { + if (this.backgroundColor) { + textBgRects.push( + '\t\t\n'); + } + }, + + /** + * Adobe Illustrator (at least CS5) is unable to render rgba()-based fill values + * we work around it by "moving" alpha channel into opacity attribute and setting fill's alpha to 1 + * + * @private + * @param {*} value + * @return {String} + */ + _getFillAttributes: function(value) { + var fillColor = (value && typeof value === 'string') ? new fabric.Color(value) : ''; + if (!fillColor || !fillColor.getSource() || fillColor.getAlpha() === 1) { + return 'fill="' + value + '"'; + } + return 'opacity="' + fillColor.getAlpha() + '" fill="' + fillColor.setAlpha(1).toRgb() + '"'; + }, + /* _TO_SVG_END_ */ + + /** + * Sets specified property to a specified value + * @param {String} key + * @param {*} value + * @return {fabric.Text} thisArg + * @chainable + */ + _set: function(key, value) { + this.callSuper('_set', key, value); + + if (key in this._dimensionAffectingProps) { + this._initDimensions(); + this.setCoords(); + } + }, + + /** + * Returns complexity of an instance + * @return {Number} complexity + */ + complexity: function() { + return 1; + } + }); + + /* _FROM_SVG_START_ */ + /** + * List of attribute names to account for when parsing SVG element (used by {@link fabric.Text.fromElement}) + * @static + * @memberOf fabric.Text + * @see: http://www.w3.org/TR/SVG/text.html#TextElement + */ + fabric.Text.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat( + 'x y dx dy font-family font-style font-weight font-size text-decoration text-anchor'.split(' ')); + + /** + * Default SVG font size + * @static + * @memberOf fabric.Text + */ + fabric.Text.DEFAULT_SVG_FONT_SIZE = 16; + + /** + * Returns fabric.Text instance from an SVG element (not yet implemented) + * @static + * @memberOf fabric.Text + * @param {SVGElement} element Element to parse + * @param {Object} [options] Options object + * @return {fabric.Text} Instance of fabric.Text + */ + fabric.Text.fromElement = function(element, options) { + if (!element) { + return null; + } + + var parsedAttributes = fabric.parseAttributes(element, fabric.Text.ATTRIBUTE_NAMES); + options = fabric.util.object.extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes); + + options.top = options.top || 0; + options.left = options.left || 0; + if ('dx' in parsedAttributes) { + options.left += parsedAttributes.dx; + } + if ('dy' in parsedAttributes) { + options.top += parsedAttributes.dy; + } + if (!('fontSize' in options)) { + options.fontSize = fabric.Text.DEFAULT_SVG_FONT_SIZE; + } + + if (!options.originX) { + options.originX = 'left'; + } + + var textContent = ''; + + // The XML is not properly parsed in IE9 so a workaround to get + // textContent is through firstChild.data. Another workaround would be + // to convert XML loaded from a file to be converted using DOMParser (same way loadSVGFromString() does) + if (!('textContent' in element)) { + if ('firstChild' in element && element.firstChild !== null) { + if ('data' in element.firstChild && element.firstChild.data !== null) { + textContent = element.firstChild.data; + } + } + } + else { + textContent = element.textContent; + } + + textContent = textContent.replace(/^\s+|\s+$|\n+/g, '').replace(/\s+/g, ' '); + + var text = new fabric.Text(textContent, options), + textHeightScaleFactor = text.getHeight() / text.height, + lineHeightDiff = (text.height + text.strokeWidth) * text.lineHeight - text.height, + scaledDiff = lineHeightDiff * textHeightScaleFactor, + textHeight = text.getHeight() + scaledDiff, + offX = 0; + /* + Adjust positioning: + x/y attributes in SVG correspond to the bottom-left corner of text bounding box + top/left properties in Fabric correspond to center point of text bounding box + */ + if (text.originX === 'left') { + offX = text.getWidth() / 2; + } + if (text.originX === 'right') { + offX = -text.getWidth() / 2; + } + text.set({ + left: text.getLeft() + offX, + top: text.getTop() - textHeight / 2 + text.fontSize * (0.18 + text._fontSizeFraction) / text.lineHeight /* 0.3 is the old lineHeight */ + }); + + return text; + }; + /* _FROM_SVG_END_ */ + + /** + * Returns fabric.Text instance from an object representation + * @static + * @memberOf fabric.Text + * @param {Object} object Object to create an instance from + * @param {Function} [callback] Callback to invoke when an fabric.Text instance is created + * @return {fabric.Text} Instance of fabric.Text + */ + fabric.Text.fromObject = function(object, callback) { + var text = new fabric.Text(object.text, clone(object)); + callback && callback(text); + return text; + }; + + fabric.util.createAccessors(fabric.Text); + +})(typeof exports !== 'undefined' ? exports : this); + + +(function() { + + var clone = fabric.util.object.clone; + + /** + * IText class (introduced in v1.4) Events are also fired with "text:" + * prefix when observing canvas. + * @class fabric.IText + * @extends fabric.Text + * @mixes fabric.Observable + * + * @fires changed + * @fires selection:changed + * @fires editing:entered + * @fires editing:exited + * + * @return {fabric.IText} thisArg + * @see {@link fabric.IText#initialize} for constructor definition + * + *

Supported key combinations:

+ *
+   *   Move cursor:                    left, right, up, down
+   *   Select character:               shift + left, shift + right
+   *   Select text vertically:         shift + up, shift + down
+   *   Move cursor by word:            alt + left, alt + right
+   *   Select words:                   shift + alt + left, shift + alt + right
+   *   Move cursor to line start/end:  cmd + left, cmd + right or home, end
+   *   Select till start/end of line:  cmd + shift + left, cmd + shift + right or shift + home, shift + end
+   *   Jump to start/end of text:      cmd + up, cmd + down
+   *   Select till start/end of text:  cmd + shift + up, cmd + shift + down or shift + pgUp, shift + pgDown
+   *   Delete character:               backspace
+   *   Delete word:                    alt + backspace
+   *   Delete line:                    cmd + backspace
+   *   Forward delete:                 delete
+   *   Copy text:                      ctrl/cmd + c
+   *   Paste text:                     ctrl/cmd + v
+   *   Cut text:                       ctrl/cmd + x
+   *   Select entire text:             ctrl/cmd + a
+   *   Quit editing                    tab or esc
+   * 
+ * + *

Supported mouse/touch combination

+ *
+   *   Position cursor:                click/touch
+   *   Create selection:               click/touch & drag
+   *   Create selection:               click & shift + click
+   *   Select word:                    double click
+   *   Select line:                    triple click
+   * 
+ */ + fabric.IText = fabric.util.createClass(fabric.Text, fabric.Observable, /** @lends fabric.IText.prototype */ { + + /** + * Type of an object + * @type String + * @default + */ + type: 'i-text', + + /** + * Index where text selection starts (or where cursor is when there is no selection) + * @type Number + * @default + */ + selectionStart: 0, + + /** + * Index where text selection ends + * @type Number + * @default + */ + selectionEnd: 0, + + /** + * Color of text selection + * @type String + * @default + */ + selectionColor: 'rgba(17,119,255,0.3)', + + /** + * Indicates whether text is in editing mode + * @type Boolean + * @default + */ + isEditing: false, + + /** + * Indicates whether a text can be edited + * @type Boolean + * @default + */ + editable: true, + + /** + * Border color of text object while it's in editing mode + * @type String + * @default + */ + editingBorderColor: 'rgba(102,153,255,0.25)', + + /** + * Width of cursor (in px) + * @type Number + * @default + */ + cursorWidth: 2, + + /** + * Color of default cursor (when not overwritten by character style) + * @type String + * @default + */ + cursorColor: '#333', + + /** + * Delay between cursor blink (in ms) + * @type Number + * @default + */ + cursorDelay: 1000, + + /** + * Duration of cursor fadein (in ms) + * @type Number + * @default + */ + cursorDuration: 600, + + /** + * Object containing character styles + * (where top-level properties corresponds to line number and 2nd-level properties -- to char number in a line) + * @type Object + * @default + */ + styles: null, + + /** + * Indicates whether internal text char widths can be cached + * @type Boolean + * @default + */ + caching: true, + + /** + * @private + */ + _reSpace: /\s|\n/, + + /** + * @private + */ + _currentCursorOpacity: 0, + + /** + * @private + */ + _selectionDirection: null, + + /** + * @private + */ + _abortCursorAnimation: false, + + /** + * @private + */ + __widthOfSpace: [], + + /** + * Constructor + * @param {String} text Text string + * @param {Object} [options] Options object + * @return {fabric.IText} thisArg + */ + initialize: function(text, options) { + this.styles = options ? (options.styles || { }) : { }; + this.callSuper('initialize', text, options); + this.initBehavior(); + }, + + /** + * @private + */ + _clearCache: function() { + this.callSuper('_clearCache'); + this.__widthOfSpace = []; + }, + + /** + * Returns true if object has no styling + */ + isEmptyStyles: function() { + if (!this.styles) { + return true; + } + var obj = this.styles; + + for (var p1 in obj) { + for (var p2 in obj[p1]) { + // eslint-disable-next-line no-unused-vars + for (var p3 in obj[p1][p2]) { + return false; + } + } + } + return true; + }, + + /** + * Sets selection start (left boundary of a selection) + * @param {Number} index Index to set selection start to + */ + setSelectionStart: function(index) { + index = Math.max(index, 0); + this._updateAndFire('selectionStart', index); + }, + + /** + * Sets selection end (right boundary of a selection) + * @param {Number} index Index to set selection end to + */ + setSelectionEnd: function(index) { + index = Math.min(index, this.text.length); + this._updateAndFire('selectionEnd', index); + }, + + /** + * @private + * @param {String} property 'selectionStart' or 'selectionEnd' + * @param {Number} index new position of property + */ + _updateAndFire: function(property, index) { + if (this[property] !== index) { + this._fireSelectionChanged(); + this[property] = index; + } + this._updateTextarea(); + }, + + /** + * Fires the even of selection changed + * @private + */ + _fireSelectionChanged: function() { + this.fire('selection:changed'); + this.canvas && this.canvas.fire('text:selection:changed', { target: this }); + }, + + /** + * Gets style of a current selection/cursor (at the start position) + * @param {Number} [startIndex] Start index to get styles at + * @param {Number} [endIndex] End index to get styles at + * @return {Object} styles Style object at a specified (or current) index + */ + getSelectionStyles: function(startIndex, endIndex) { + + if (arguments.length === 2) { + var styles = []; + for (var i = startIndex; i < endIndex; i++) { + styles.push(this.getSelectionStyles(i)); + } + return styles; + } + + var loc = this.get2DCursorLocation(startIndex), + style = this._getStyleDeclaration(loc.lineIndex, loc.charIndex); + + return style || {}; + }, + + /** + * Sets style of a current selection + * @param {Object} [styles] Styles object + * @return {fabric.IText} thisArg + * @chainable + */ + setSelectionStyles: function(styles) { + if (this.selectionStart === this.selectionEnd) { + this._extendStyles(this.selectionStart, styles); + } + else { + for (var i = this.selectionStart; i < this.selectionEnd; i++) { + this._extendStyles(i, styles); + } + } + /* not included in _extendStyles to avoid clearing cache more than once */ + this._forceClearCache = true; + return this; + }, + + /** + * @private + */ + _extendStyles: function(index, styles) { + var loc = this.get2DCursorLocation(index); + + if (!this._getLineStyle(loc.lineIndex)) { + this._setLineStyle(loc.lineIndex, {}); + } + + if (!this._getStyleDeclaration(loc.lineIndex, loc.charIndex)) { + this._setStyleDeclaration(loc.lineIndex, loc.charIndex, {}); + } + + fabric.util.object.extend(this._getStyleDeclaration(loc.lineIndex, loc.charIndex), styles); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Boolean} noTransform + */ + render: function(ctx, noTransform) { + this.clearContextTop(); + this.callSuper('render', ctx, noTransform); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _render: function(ctx) { + this.callSuper('_render', ctx); + this.ctx = ctx; + // clear the cursorOffsetCache, so we ensure to calculate once per renderCursor + // the correct position but not at every cursor animation. + this.cursorOffsetCache = { }; + this.renderCursorOrSelection(); + }, + + /** + * Prepare and clean the contextTop + */ + clearContextTop: function() { + if (!this.active || !this.isEditing) { + return; + } + if (this.canvas && this.canvas.contextTop) { + var ctx = this.canvas.contextTop; + ctx.save(); + ctx.transform.apply(ctx, this.canvas.viewportTransform); + this.transform(ctx); + this.transformMatrix && ctx.transform.apply(ctx, this.transformMatrix); + this._clearTextArea(ctx); + ctx.restore(); + } + }, + + /** + * Renders cursor or selection (depending on what exists) + */ + renderCursorOrSelection: function() { + if (!this.active || !this.isEditing) { + return; + } + var chars = this.text.split(''), + boundaries, ctx; + if (this.canvas && this.canvas.contextTop) { + ctx = this.canvas.contextTop; + ctx.save(); + ctx.transform.apply(ctx, this.canvas.viewportTransform); + this.transform(ctx); + this.transformMatrix && ctx.transform.apply(ctx, this.transformMatrix); + this._clearTextArea(ctx); + } + else { + ctx = this.ctx; + ctx.save(); + } + if (this.selectionStart === this.selectionEnd) { + boundaries = this._getCursorBoundaries(chars, 'cursor'); + this.renderCursor(boundaries, ctx); + } + else { + boundaries = this._getCursorBoundaries(chars, 'selection'); + this.renderSelection(chars, boundaries, ctx); + } + ctx.restore(); + }, + + _clearTextArea: function(ctx) { + // we add 4 pixel, to be sure to do not leave any pixel out + var width = this.width + 4, height = this.height + 4; + ctx.clearRect(-width / 2, -height / 2, width, height); + }, + /** + * Returns 2d representation (lineIndex and charIndex) of cursor (or selection start) + * @param {Number} [selectionStart] Optional index. When not given, current selectionStart is used. + */ + get2DCursorLocation: function(selectionStart) { + if (typeof selectionStart === 'undefined') { + selectionStart = this.selectionStart; + } + var len = this._textLines.length; + for (var i = 0; i < len; i++) { + if (selectionStart <= this._textLines[i].length) { + return { + lineIndex: i, + charIndex: selectionStart + }; + } + selectionStart -= this._textLines[i].length + 1; + } + return { + lineIndex: i - 1, + charIndex: this._textLines[i - 1].length < selectionStart ? this._textLines[i - 1].length : selectionStart + }; + }, + + /** + * Returns complete style of char at the current cursor + * @param {Number} lineIndex Line index + * @param {Number} charIndex Char index + * @return {Object} Character style + */ + getCurrentCharStyle: function(lineIndex, charIndex) { + var style = this._getStyleDeclaration(lineIndex, charIndex === 0 ? 0 : charIndex - 1); + + return { + fontSize: style && style.fontSize || this.fontSize, + fill: style && style.fill || this.fill, + textBackgroundColor: style && style.textBackgroundColor || this.textBackgroundColor, + textDecoration: style && style.textDecoration || this.textDecoration, + fontFamily: style && style.fontFamily || this.fontFamily, + fontWeight: style && style.fontWeight || this.fontWeight, + fontStyle: style && style.fontStyle || this.fontStyle, + stroke: style && style.stroke || this.stroke, + strokeWidth: style && style.strokeWidth || this.strokeWidth + }; + }, + + /** + * Returns fontSize of char at the current cursor + * @param {Number} lineIndex Line index + * @param {Number} charIndex Char index + * @return {Number} Character font size + */ + getCurrentCharFontSize: function(lineIndex, charIndex) { + var style = this._getStyleDeclaration(lineIndex, charIndex === 0 ? 0 : charIndex - 1); + return style && style.fontSize ? style.fontSize : this.fontSize; + }, + + /** + * Returns color (fill) of char at the current cursor + * @param {Number} lineIndex Line index + * @param {Number} charIndex Char index + * @return {String} Character color (fill) + */ + getCurrentCharColor: function(lineIndex, charIndex) { + var style = this._getStyleDeclaration(lineIndex, charIndex === 0 ? 0 : charIndex - 1); + return style && style.fill ? style.fill : this.cursorColor; + }, + + /** + * Returns cursor boundaries (left, top, leftOffset, topOffset) + * @private + * @param {Array} chars Array of characters + * @param {String} typeOfBoundaries + */ + _getCursorBoundaries: function(chars, typeOfBoundaries) { + + // left/top are left/top of entire text box + // leftOffset/topOffset are offset from that left/top point of a text box + + var left = Math.round(this._getLeftOffset()), + top = this._getTopOffset(), + + offsets = this._getCursorBoundariesOffsets( + chars, typeOfBoundaries); + + return { + left: left, + top: top, + leftOffset: offsets.left + offsets.lineLeft, + topOffset: offsets.top + }; + }, + + /** + * @private + */ + _getCursorBoundariesOffsets: function(chars, typeOfBoundaries) { + if (this.cursorOffsetCache && 'top' in this.cursorOffsetCache) { + return this.cursorOffsetCache; + } + var lineLeftOffset = 0, + lineIndex = 0, + charIndex = 0, + topOffset = 0, + leftOffset = 0, + boundaries; + + for (var i = 0; i < this.selectionStart; i++) { + if (chars[i] === '\n') { + leftOffset = 0; + topOffset += this._getHeightOfLine(this.ctx, lineIndex); + + lineIndex++; + charIndex = 0; + } + else { + leftOffset += this._getWidthOfChar(this.ctx, chars[i], lineIndex, charIndex); + charIndex++; + } + + lineLeftOffset = this._getLineLeftOffset(this._getLineWidth(this.ctx, lineIndex)); + } + if (typeOfBoundaries === 'cursor') { + topOffset += (1 - this._fontSizeFraction) * this._getHeightOfLine(this.ctx, lineIndex) / this.lineHeight + - this.getCurrentCharFontSize(lineIndex, charIndex) * (1 - this._fontSizeFraction); + } + if (this.charSpacing !== 0 && charIndex === this._textLines[lineIndex].length) { + leftOffset -= this._getWidthOfCharSpacing(); + } + boundaries = { + top: topOffset, + left: leftOffset > 0 ? leftOffset : 0, + lineLeft: lineLeftOffset + }; + this.cursorOffsetCache = boundaries; + return this.cursorOffsetCache; + }, + + /** + * Renders cursor + * @param {Object} boundaries + * @param {CanvasRenderingContext2D} ctx transformed context to draw on + */ + renderCursor: function(boundaries, ctx) { + + var cursorLocation = this.get2DCursorLocation(), + lineIndex = cursorLocation.lineIndex, + charIndex = cursorLocation.charIndex, + charHeight = this.getCurrentCharFontSize(lineIndex, charIndex), + leftOffset = (lineIndex === 0 && charIndex === 0) + ? this._getLineLeftOffset(this._getLineWidth(ctx, lineIndex)) + : boundaries.leftOffset, + multiplier = this.scaleX * this.canvas.getZoom(), + cursorWidth = this.cursorWidth / multiplier; + + ctx.fillStyle = this.getCurrentCharColor(lineIndex, charIndex); + ctx.globalAlpha = this.__isMousedown ? 1 : this._currentCursorOpacity; + + ctx.fillRect( + boundaries.left + leftOffset - cursorWidth / 2, + boundaries.top + boundaries.topOffset, + cursorWidth, + charHeight); + }, + + /** + * Renders text selection + * @param {Array} chars Array of characters + * @param {Object} boundaries Object with left/top/leftOffset/topOffset + * @param {CanvasRenderingContext2D} ctx transformed context to draw on + */ + renderSelection: function(chars, boundaries, ctx) { + + ctx.fillStyle = this.selectionColor; + + var start = this.get2DCursorLocation(this.selectionStart), + end = this.get2DCursorLocation(this.selectionEnd), + startLine = start.lineIndex, + endLine = end.lineIndex; + for (var i = startLine; i <= endLine; i++) { + var lineOffset = this._getLineLeftOffset(this._getLineWidth(ctx, i)) || 0, + lineHeight = this._getHeightOfLine(this.ctx, i), + realLineHeight = 0, boxWidth = 0, line = this._textLines[i]; + + if (i === startLine) { + for (var j = 0, len = line.length; j < len; j++) { + if (j >= start.charIndex && (i !== endLine || j < end.charIndex)) { + boxWidth += this._getWidthOfChar(ctx, line[j], i, j); + } + if (j < start.charIndex) { + lineOffset += this._getWidthOfChar(ctx, line[j], i, j); + } + } + if (j === line.length) { + boxWidth -= this._getWidthOfCharSpacing(); + } + } + else if (i > startLine && i < endLine) { + boxWidth += this._getLineWidth(ctx, i) || 5; + } + else if (i === endLine) { + for (var j2 = 0, j2len = end.charIndex; j2 < j2len; j2++) { + boxWidth += this._getWidthOfChar(ctx, line[j2], i, j2); + } + if (end.charIndex === line.length) { + boxWidth -= this._getWidthOfCharSpacing(); + } + } + realLineHeight = lineHeight; + if (this.lineHeight < 1 || (i === endLine && this.lineHeight > 1)) { + lineHeight /= this.lineHeight; + } + ctx.fillRect( + boundaries.left + lineOffset, + boundaries.top + boundaries.topOffset, + boxWidth > 0 ? boxWidth : 0, + lineHeight); + + boundaries.topOffset += realLineHeight; + } + }, + + /** + * @private + * @param {String} method + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} line Content of the line + * @param {Number} left + * @param {Number} top + * @param {Number} lineIndex + * @param {Number} charOffset + */ + _renderChars: function(method, ctx, line, left, top, lineIndex, charOffset) { + + if (this.isEmptyStyles()) { + return this._renderCharsFast(method, ctx, line, left, top); + } + + charOffset = charOffset || 0; + + // set proper line offset + var lineHeight = this._getHeightOfLine(ctx, lineIndex), + prevStyle, + thisStyle, + charsToRender = ''; + + ctx.save(); + top -= lineHeight / this.lineHeight * this._fontSizeFraction; + for (var i = charOffset, len = line.length + charOffset; i <= len; i++) { + prevStyle = prevStyle || this.getCurrentCharStyle(lineIndex, i); + thisStyle = this.getCurrentCharStyle(lineIndex, i + 1); + + if (this._hasStyleChanged(prevStyle, thisStyle) || i === len) { + this._renderChar(method, ctx, lineIndex, i - 1, charsToRender, left, top, lineHeight); + charsToRender = ''; + prevStyle = thisStyle; + } + charsToRender += line[i - charOffset]; + } + ctx.restore(); + }, + + /** + * @private + * @param {String} method + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} line Content of the line + * @param {Number} left Left coordinate + * @param {Number} top Top coordinate + */ + _renderCharsFast: function(method, ctx, line, left, top) { + + if (method === 'fillText' && this.fill) { + this.callSuper('_renderChars', method, ctx, line, left, top); + } + if (method === 'strokeText' && ((this.stroke && this.strokeWidth > 0) || this.skipFillStrokeCheck)) { + this.callSuper('_renderChars', method, ctx, line, left, top); + } + }, + + /** + * @private + * @param {String} method + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Number} lineIndex + * @param {Number} i + * @param {String} _char + * @param {Number} left Left coordinate + * @param {Number} top Top coordinate + * @param {Number} lineHeight Height of the line + */ + _renderChar: function(method, ctx, lineIndex, i, _char, left, top, lineHeight) { + var charWidth, charHeight, shouldFill, shouldStroke, + decl = this._getStyleDeclaration(lineIndex, i), + offset, textDecoration, chars, additionalSpace, _charWidth; + + if (decl) { + charHeight = this._getHeightOfChar(ctx, _char, lineIndex, i); + shouldStroke = decl.stroke; + shouldFill = decl.fill; + textDecoration = decl.textDecoration; + } + else { + charHeight = this.fontSize; + } + + shouldStroke = (shouldStroke || this.stroke) && method === 'strokeText'; + shouldFill = (shouldFill || this.fill) && method === 'fillText'; + + decl && ctx.save(); + + charWidth = this._applyCharStylesGetWidth(ctx, _char, lineIndex, i, decl || null); + textDecoration = textDecoration || this.textDecoration; + + if (decl && decl.textBackgroundColor) { + this._removeShadow(ctx); + } + if (this.charSpacing !== 0) { + additionalSpace = this._getWidthOfCharSpacing(); + chars = _char.split(''); + charWidth = 0; + for (var j = 0, len = chars.length, char; j < len; j++) { + char = chars[j]; + shouldFill && ctx.fillText(char, left + charWidth, top); + shouldStroke && ctx.strokeText(char, left + charWidth, top); + _charWidth = ctx.measureText(char).width + additionalSpace; + charWidth += _charWidth > 0 ? _charWidth : 0; + } + } + else { + shouldFill && ctx.fillText(_char, left, top); + shouldStroke && ctx.strokeText(_char, left, top); + } + + if (textDecoration || textDecoration !== '') { + offset = this._fontSizeFraction * lineHeight / this.lineHeight; + this._renderCharDecoration(ctx, textDecoration, left, top, offset, charWidth, charHeight); + } + + decl && ctx.restore(); + ctx.translate(charWidth, 0); + }, + + /** + * @private + * @param {Object} prevStyle + * @param {Object} thisStyle + */ + _hasStyleChanged: function(prevStyle, thisStyle) { + return (prevStyle.fill !== thisStyle.fill || + prevStyle.fontSize !== thisStyle.fontSize || + prevStyle.textBackgroundColor !== thisStyle.textBackgroundColor || + prevStyle.textDecoration !== thisStyle.textDecoration || + prevStyle.fontFamily !== thisStyle.fontFamily || + prevStyle.fontWeight !== thisStyle.fontWeight || + prevStyle.fontStyle !== thisStyle.fontStyle || + prevStyle.stroke !== thisStyle.stroke || + prevStyle.strokeWidth !== thisStyle.strokeWidth + ); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderCharDecoration: function(ctx, textDecoration, left, top, offset, charWidth, charHeight) { + + if (!textDecoration) { + return; + } + + var decorationWeight = charHeight / 15, + positions = { + underline: top + charHeight / 10, + 'line-through': top - charHeight * (this._fontSizeFraction + this._fontSizeMult - 1) + decorationWeight, + overline: top - (this._fontSizeMult - this._fontSizeFraction) * charHeight + }, + decorations = ['underline', 'line-through', 'overline'], i, decoration; + + for (i = 0; i < decorations.length; i++) { + decoration = decorations[i]; + if (textDecoration.indexOf(decoration) > -1) { + ctx.fillRect(left, positions[decoration], charWidth , decorationWeight); + } + } + }, + + /** + * @private + * @param {String} method + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} line + * @param {Number} left + * @param {Number} top + * @param {Number} lineIndex + */ + _renderTextLine: function(method, ctx, line, left, top, lineIndex) { + // to "cancel" this.fontSize subtraction in fabric.Text#_renderTextLine + // the adding 0.03 is just to align text with itext by overlap test + if (!this.isEmptyStyles()) { + top += this.fontSize * (this._fontSizeFraction + 0.03); + } + this.callSuper('_renderTextLine', method, ctx, line, left, top, lineIndex); + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderTextDecoration: function(ctx) { + if (this.isEmptyStyles()) { + return this.callSuper('_renderTextDecoration', ctx); + } + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _renderTextLinesBackground: function(ctx) { + this.callSuper('_renderTextLinesBackground', ctx); + + var lineTopOffset = 0, heightOfLine, + lineWidth, lineLeftOffset, + leftOffset = this._getLeftOffset(), + topOffset = this._getTopOffset(), + line, _char, style; + + for (var i = 0, len = this._textLines.length; i < len; i++) { + heightOfLine = this._getHeightOfLine(ctx, i); + line = this._textLines[i]; + + if (line === '' || !this.styles || !this._getLineStyle(i)) { + lineTopOffset += heightOfLine; + continue; + } + + lineWidth = this._getLineWidth(ctx, i); + lineLeftOffset = this._getLineLeftOffset(lineWidth); + + for (var j = 0, jlen = line.length; j < jlen; j++) { + style = this._getStyleDeclaration(i, j); + if (!style || !style.textBackgroundColor) { + continue; + } + _char = line[j]; + + ctx.fillStyle = style.textBackgroundColor; + + ctx.fillRect( + leftOffset + lineLeftOffset + this._getWidthOfCharsAt(ctx, i, j), + topOffset + lineTopOffset, + this._getWidthOfChar(ctx, _char, i, j), + heightOfLine / this.lineHeight + ); + } + lineTopOffset += heightOfLine; + } + }, + + /** + * @private + */ + _getCacheProp: function(_char, styleDeclaration) { + return _char + + styleDeclaration.fontSize + + styleDeclaration.fontWeight + + styleDeclaration.fontStyle; + }, + + /** + * @private + * @param {String} fontFamily name + * @return {Object} reference to cache + */ + _getFontCache: function(fontFamily) { + if (!fabric.charWidthsCache[fontFamily]) { + fabric.charWidthsCache[fontFamily] = { }; + } + return fabric.charWidthsCache[fontFamily]; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} _char + * @param {Number} lineIndex + * @param {Number} charIndex + * @param {Object} [decl] + */ + _applyCharStylesGetWidth: function(ctx, _char, lineIndex, charIndex, decl) { + var charDecl = decl || this._getStyleDeclaration(lineIndex, charIndex), + styleDeclaration = clone(charDecl), + width, cacheProp, charWidthsCache; + + this._applyFontStyles(styleDeclaration); + charWidthsCache = this._getFontCache(styleDeclaration.fontFamily); + cacheProp = this._getCacheProp(_char, styleDeclaration); + + // short-circuit if no styles for this char + // global style from object is always applyed and handled by save and restore + if (!charDecl && charWidthsCache[cacheProp] && this.caching) { + return charWidthsCache[cacheProp]; + } + + if (typeof styleDeclaration.shadow === 'string') { + styleDeclaration.shadow = new fabric.Shadow(styleDeclaration.shadow); + } + + var fill = styleDeclaration.fill || this.fill; + ctx.fillStyle = fill.toLive + ? fill.toLive(ctx, this) + : fill; + + if (styleDeclaration.stroke) { + ctx.strokeStyle = (styleDeclaration.stroke && styleDeclaration.stroke.toLive) + ? styleDeclaration.stroke.toLive(ctx, this) + : styleDeclaration.stroke; + } + + ctx.lineWidth = styleDeclaration.strokeWidth || this.strokeWidth; + ctx.font = this._getFontDeclaration.call(styleDeclaration); + + //if we want this._setShadow.call to work with styleDeclarion + //we have to add those references + if (styleDeclaration.shadow) { + styleDeclaration.scaleX = this.scaleX; + styleDeclaration.scaleY = this.scaleY; + styleDeclaration.canvas = this.canvas; + styleDeclaration.getObjectScaling = this.getObjectScaling; + this._setShadow.call(styleDeclaration, ctx); + } + + if (!this.caching || !charWidthsCache[cacheProp]) { + width = ctx.measureText(_char).width; + this.caching && (charWidthsCache[cacheProp] = width); + return width; + } + + return charWidthsCache[cacheProp]; + }, + + /** + * @private + * @param {Object} styleDeclaration + */ + _applyFontStyles: function(styleDeclaration) { + if (!styleDeclaration.fontFamily) { + styleDeclaration.fontFamily = this.fontFamily; + } + if (!styleDeclaration.fontSize) { + styleDeclaration.fontSize = this.fontSize; + } + if (!styleDeclaration.fontWeight) { + styleDeclaration.fontWeight = this.fontWeight; + } + if (!styleDeclaration.fontStyle) { + styleDeclaration.fontStyle = this.fontStyle; + } + }, + + /** + * @param {Number} lineIndex + * @param {Number} charIndex + * @param {Boolean} [returnCloneOrEmpty=false] + * @private + */ + _getStyleDeclaration: function(lineIndex, charIndex, returnCloneOrEmpty) { + if (returnCloneOrEmpty) { + return (this.styles[lineIndex] && this.styles[lineIndex][charIndex]) + ? clone(this.styles[lineIndex][charIndex]) + : { }; + } + + return this.styles[lineIndex] && this.styles[lineIndex][charIndex] ? this.styles[lineIndex][charIndex] : null; + }, + + /** + * @param {Number} lineIndex + * @param {Number} charIndex + * @param {Object} style + * @private + */ + _setStyleDeclaration: function(lineIndex, charIndex, style) { + this.styles[lineIndex][charIndex] = style; + }, + + /** + * + * @param {Number} lineIndex + * @param {Number} charIndex + * @private + */ + _deleteStyleDeclaration: function(lineIndex, charIndex) { + delete this.styles[lineIndex][charIndex]; + }, + + /** + * @param {Number} lineIndex + * @private + */ + _getLineStyle: function(lineIndex) { + return this.styles[lineIndex]; + }, + + /** + * @param {Number} lineIndex + * @param {Object} style + * @private + */ + _setLineStyle: function(lineIndex, style) { + this.styles[lineIndex] = style; + }, + + /** + * @param {Number} lineIndex + * @private + */ + _deleteLineStyle: function(lineIndex) { + delete this.styles[lineIndex]; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _getWidthOfChar: function(ctx, _char, lineIndex, charIndex) { + if (!this._isMeasuring && this.textAlign === 'justify' && this._reSpacesAndTabs.test(_char)) { + return this._getWidthOfSpace(ctx, lineIndex); + } + ctx.save(); + var width = this._applyCharStylesGetWidth(ctx, _char, lineIndex, charIndex); + if (this.charSpacing !== 0) { + width += this._getWidthOfCharSpacing(); + } + ctx.restore(); + return width > 0 ? width : 0 + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Number} lineIndex + * @param {Number} charIndex + */ + _getHeightOfChar: function(ctx, lineIndex, charIndex) { + var style = this._getStyleDeclaration(lineIndex, charIndex); + return style && style.fontSize ? style.fontSize : this.fontSize; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Number} lineIndex + * @param {Number} charIndex + */ + _getWidthOfCharsAt: function(ctx, lineIndex, charIndex) { + var width = 0, i, _char; + for (i = 0; i < charIndex; i++) { + _char = this._textLines[lineIndex][i]; + width += this._getWidthOfChar(ctx, _char, lineIndex, i); + } + return width; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Number} lineIndex line number + * @return {Number} Line width + */ + _measureLine: function(ctx, lineIndex) { + this._isMeasuring = true; + var width = this._getWidthOfCharsAt(ctx, lineIndex, this._textLines[lineIndex].length); + if (this.charSpacing !== 0) { + width -= this._getWidthOfCharSpacing(); + } + this._isMeasuring = false; + return width > 0 ? width : 0; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {Number} lineIndex + */ + _getWidthOfSpace: function (ctx, lineIndex) { + if (this.__widthOfSpace[lineIndex]) { + return this.__widthOfSpace[lineIndex]; + } + var line = this._textLines[lineIndex], + wordsWidth = this._getWidthOfWords(ctx, line, lineIndex, 0), + widthDiff = this.width - wordsWidth, + numSpaces = line.length - line.replace(this._reSpacesAndTabs, '').length, + width = Math.max(widthDiff / numSpaces, ctx.measureText(' ').width); + this.__widthOfSpace[lineIndex] = width; + return width; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + * @param {String} line + * @param {Number} lineIndex + * @param {Number} charOffset + */ + _getWidthOfWords: function (ctx, line, lineIndex, charOffset) { + var width = 0; + + for (var charIndex = 0; charIndex < line.length; charIndex++) { + var _char = line[charIndex]; + + if (!_char.match(/\s/)) { + width += this._getWidthOfChar(ctx, _char, lineIndex, charIndex + charOffset); + } + } + + return width; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _getHeightOfLine: function(ctx, lineIndex) { + if (this.__lineHeights[lineIndex]) { + return this.__lineHeights[lineIndex]; + } + + var line = this._textLines[lineIndex], + maxHeight = this._getHeightOfChar(ctx, lineIndex, 0); + + for (var i = 1, len = line.length; i < len; i++) { + var currentCharHeight = this._getHeightOfChar(ctx, lineIndex, i); + if (currentCharHeight > maxHeight) { + maxHeight = currentCharHeight; + } + } + this.__lineHeights[lineIndex] = maxHeight * this.lineHeight * this._fontSizeMult; + return this.__lineHeights[lineIndex]; + }, + + /** + * @private + * @param {CanvasRenderingContext2D} ctx Context to render on + */ + _getTextHeight: function(ctx) { + var lineHeight, height = 0; + for (var i = 0, len = this._textLines.length; i < len; i++) { + lineHeight = this._getHeightOfLine(ctx, i); + height += (i === len - 1 ? lineHeight / this.lineHeight : lineHeight); + } + return height; + }, + + /** + * Returns object representation of an instance + * @method toObject + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + return fabric.util.object.extend(this.callSuper('toObject', propertiesToInclude), { + styles: clone(this.styles, true) + }); + } + }); + + /** + * Returns fabric.IText instance from an object representation + * @static + * @memberOf fabric.IText + * @param {Object} object Object to create an instance from + * @param {function} [callback] invoked with new instance as argument + * @return {fabric.IText} instance of fabric.IText + */ + fabric.IText.fromObject = function(object, callback) { + var iText = new fabric.IText(object.text, clone(object)); + callback && callback(iText); + return iText; + }; +})(); + + +(function() { + + var clone = fabric.util.object.clone; + + fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.prototype */ { + + /** + * Initializes all the interactive behavior of IText + */ + initBehavior: function() { + this.initAddedHandler(); + this.initRemovedHandler(); + this.initCursorSelectionHandlers(); + this.initDoubleClickSimulation(); + this.mouseMoveHandler = this.mouseMoveHandler.bind(this); + }, + + /** + * Initializes "selected" event handler + */ + initSelectedHandler: function() { + this.on('selected', function() { + + var _this = this; + setTimeout(function() { + _this.selected = true; + }, 100); + }); + }, + + /** + * Initializes "added" event handler + */ + initAddedHandler: function() { + var _this = this; + this.on('added', function() { + var canvas = _this.canvas; + if (canvas) { + if (!canvas._hasITextHandlers) { + canvas._hasITextHandlers = true; + _this._initCanvasHandlers(canvas); + } + canvas._iTextInstances = canvas._iTextInstances || []; + canvas._iTextInstances.push(_this); + } + }); + }, + + initRemovedHandler: function() { + var _this = this; + this.on('removed', function() { + var canvas = _this.canvas; + if (canvas) { + canvas._iTextInstances = canvas._iTextInstances || []; + fabric.util.removeFromArray(canvas._iTextInstances, _this); + if (canvas._iTextInstances.length === 0) { + canvas._hasITextHandlers = false; + _this._removeCanvasHandlers(canvas); + } + } + }); + }, + + /** + * register canvas event to manage exiting on other instances + * @private + */ + _initCanvasHandlers: function(canvas) { + canvas._canvasITextSelectionClearedHanlder = (function() { + fabric.IText.prototype.exitEditingOnOthers(canvas); + }).bind(this); + canvas._mouseUpITextHandler = (function() { + if (canvas._iTextInstances) { + canvas._iTextInstances.forEach(function(obj) { + obj.__isMousedown = false; + }); + } + }).bind(this); + canvas.on('selection:cleared', canvas._canvasITextSelectionClearedHanlder); + canvas.on('object:selected', canvas._canvasITextSelectionClearedHanlder); + canvas.on('mouse:up', canvas._mouseUpITextHandler); + }, + + /** + * remove canvas event to manage exiting on other instances + * @private + */ + _removeCanvasHandlers: function(canvas) { + canvas.off('selection:cleared', canvas._canvasITextSelectionClearedHanlder); + canvas.off('object:selected', canvas._canvasITextSelectionClearedHanlder); + canvas.off('mouse:up', canvas._mouseUpITextHandler); + }, + + /** + * @private + */ + _tick: function() { + this._currentTickState = this._animateCursor(this, 1, this.cursorDuration, '_onTickComplete'); + }, + + /** + * @private + */ + _animateCursor: function(obj, targetOpacity, duration, completeMethod) { + + var tickState; + + tickState = { + isAborted: false, + abort: function() { + this.isAborted = true; + }, + }; + + obj.animate('_currentCursorOpacity', targetOpacity, { + duration: duration, + onComplete: function() { + if (!tickState.isAborted) { + obj[completeMethod](); + } + }, + onChange: function() { + // we do not want to animate a selection, only cursor + if (obj.canvas && obj.selectionStart === obj.selectionEnd) { + obj.renderCursorOrSelection(); + } + }, + abort: function() { + return tickState.isAborted; + } + }); + return tickState; + }, + + /** + * @private + */ + _onTickComplete: function() { + + var _this = this; + + if (this._cursorTimeout1) { + clearTimeout(this._cursorTimeout1); + } + this._cursorTimeout1 = setTimeout(function() { + _this._currentTickCompleteState = _this._animateCursor(_this, 0, this.cursorDuration / 2, '_tick'); + }, 100); + }, + + /** + * Initializes delayed cursor + */ + initDelayedCursor: function(restart) { + var _this = this, + delay = restart ? 0 : this.cursorDelay; + + this.abortCursorAnimation(); + this._currentCursorOpacity = 1; + this._cursorTimeout2 = setTimeout(function() { + _this._tick(); + }, delay); + }, + + /** + * Aborts cursor animation and clears all timeouts + */ + abortCursorAnimation: function() { + var shouldClear = this._currentTickState || this._currentTickCompleteState; + this._currentTickState && this._currentTickState.abort(); + this._currentTickCompleteState && this._currentTickCompleteState.abort(); + + clearTimeout(this._cursorTimeout1); + clearTimeout(this._cursorTimeout2); + + this._currentCursorOpacity = 0; + // to clear just itext area we need to transform the context + // it may not be worth it + if (shouldClear) { + this.canvas && this.canvas.clearContext(this.canvas.contextTop || this.ctx); + } + + }, + + /** + * Selects entire text + */ + selectAll: function() { + this.selectionStart = 0; + this.selectionEnd = this.text.length; + this._fireSelectionChanged(); + this._updateTextarea(); + }, + + /** + * Returns selected text + * @return {String} + */ + getSelectedText: function() { + return this.text.slice(this.selectionStart, this.selectionEnd); + }, + + /** + * Find new selection index representing start of current word according to current selection index + * @param {Number} startFrom Surrent selection index + * @return {Number} New selection index + */ + findWordBoundaryLeft: function(startFrom) { + var offset = 0, index = startFrom - 1; + + // remove space before cursor first + if (this._reSpace.test(this.text.charAt(index))) { + while (this._reSpace.test(this.text.charAt(index))) { + offset++; + index--; + } + } + while (/\S/.test(this.text.charAt(index)) && index > -1) { + offset++; + index--; + } + + return startFrom - offset; + }, + + /** + * Find new selection index representing end of current word according to current selection index + * @param {Number} startFrom Current selection index + * @return {Number} New selection index + */ + findWordBoundaryRight: function(startFrom) { + var offset = 0, index = startFrom; + + // remove space after cursor first + if (this._reSpace.test(this.text.charAt(index))) { + while (this._reSpace.test(this.text.charAt(index))) { + offset++; + index++; + } + } + while (/\S/.test(this.text.charAt(index)) && index < this.text.length) { + offset++; + index++; + } + + return startFrom + offset; + }, + + /** + * Find new selection index representing start of current line according to current selection index + * @param {Number} startFrom Current selection index + * @return {Number} New selection index + */ + findLineBoundaryLeft: function(startFrom) { + var offset = 0, index = startFrom - 1; + + while (!/\n/.test(this.text.charAt(index)) && index > -1) { + offset++; + index--; + } + + return startFrom - offset; + }, + + /** + * Find new selection index representing end of current line according to current selection index + * @param {Number} startFrom Current selection index + * @return {Number} New selection index + */ + findLineBoundaryRight: function(startFrom) { + var offset = 0, index = startFrom; + + while (!/\n/.test(this.text.charAt(index)) && index < this.text.length) { + offset++; + index++; + } + + return startFrom + offset; + }, + + /** + * Returns number of newlines in selected text + * @return {Number} Number of newlines in selected text + */ + getNumNewLinesInSelectedText: function() { + var selectedText = this.getSelectedText(), + numNewLines = 0; + + for (var i = 0, len = selectedText.length; i < len; i++) { + if (selectedText[i] === '\n') { + numNewLines++; + } + } + return numNewLines; + }, + + /** + * Finds index corresponding to beginning or end of a word + * @param {Number} selectionStart Index of a character + * @param {Number} direction 1 or -1 + * @return {Number} Index of the beginning or end of a word + */ + searchWordBoundary: function(selectionStart, direction) { + var index = this._reSpace.test(this.text.charAt(selectionStart)) ? selectionStart - 1 : selectionStart, + _char = this.text.charAt(index), + reNonWord = /[ \n\.,;!\?\-]/; + + while (!reNonWord.test(_char) && index > 0 && index < this.text.length) { + index += direction; + _char = this.text.charAt(index); + } + if (reNonWord.test(_char) && _char !== '\n') { + index += direction === 1 ? 0 : 1; + } + return index; + }, + + /** + * Selects a word based on the index + * @param {Number} selectionStart Index of a character + */ + selectWord: function(selectionStart) { + selectionStart = selectionStart || this.selectionStart; + var newSelectionStart = this.searchWordBoundary(selectionStart, -1), /* search backwards */ + newSelectionEnd = this.searchWordBoundary(selectionStart, 1); /* search forward */ + + this.selectionStart = newSelectionStart; + this.selectionEnd = newSelectionEnd; + this._fireSelectionChanged(); + this._updateTextarea(); + this.renderCursorOrSelection(); + }, + + /** + * Selects a line based on the index + * @param {Number} selectionStart Index of a character + */ + selectLine: function(selectionStart) { + selectionStart = selectionStart || this.selectionStart; + var newSelectionStart = this.findLineBoundaryLeft(selectionStart), + newSelectionEnd = this.findLineBoundaryRight(selectionStart); + + this.selectionStart = newSelectionStart; + this.selectionEnd = newSelectionEnd; + this._fireSelectionChanged(); + this._updateTextarea(); + }, + + /** + * Enters editing state + * @return {fabric.IText} thisArg + * @chainable + */ + enterEditing: function(e) { + if (this.isEditing || !this.editable) { + return; + } + + if (this.canvas) { + this.exitEditingOnOthers(this.canvas); + } + + this.isEditing = true; + + this.initHiddenTextarea(e); + this.hiddenTextarea.focus(); + this._updateTextarea(); + this._saveEditingProps(); + this._setEditingProps(); + this._textBeforeEdit = this.text; + + this._tick(); + this.fire('editing:entered'); + + if (!this.canvas) { + return this; + } + this.canvas.fire('text:editing:entered', { target: this }); + this.initMouseMoveHandler(); + this.canvas.renderAll(); + return this; + }, + + exitEditingOnOthers: function(canvas) { + if (canvas._iTextInstances) { + canvas._iTextInstances.forEach(function(obj) { + obj.selected = false; + if (obj.isEditing) { + obj.exitEditing(); + } + }); + } + }, + + /** + * Initializes "mousemove" event handler + */ + initMouseMoveHandler: function() { + this.canvas.on('mouse:move', this.mouseMoveHandler); + }, + + /** + * @private + */ + mouseMoveHandler: function(options) { + if (!this.__isMousedown || !this.isEditing) { + return; + } + + var newSelectionStart = this.getSelectionStartFromPointer(options.e), + currentStart = this.selectionStart, + currentEnd = this.selectionEnd; + if (newSelectionStart === this.__selectionStartOnMouseDown) { + return; + } + if (newSelectionStart > this.__selectionStartOnMouseDown) { + this.selectionStart = this.__selectionStartOnMouseDown; + this.selectionEnd = newSelectionStart; + } + else { + this.selectionStart = newSelectionStart; + this.selectionEnd = this.__selectionStartOnMouseDown; + } + if (this.selectionStart !== currentStart || this.selectionEnd !== currentEnd) { + this._fireSelectionChanged(); + this._updateTextarea(); + this.renderCursorOrSelection(); + } + }, + + /** + * @private + */ + _setEditingProps: function() { + this.hoverCursor = 'text'; + + if (this.canvas) { + this.canvas.defaultCursor = this.canvas.moveCursor = 'text'; + } + + this.borderColor = this.editingBorderColor; + + this.hasControls = this.selectable = false; + this.lockMovementX = this.lockMovementY = true; + }, + + /** + * @private + */ + _updateTextarea: function() { + if (!this.hiddenTextarea || this.inCompositionMode) { + return; + } + this.cursorOffsetCache = { }; + this.hiddenTextarea.value = this.text; + this.hiddenTextarea.selectionStart = this.selectionStart; + this.hiddenTextarea.selectionEnd = this.selectionEnd; + if (this.selectionStart === this.selectionEnd) { + var style = this._calcTextareaPosition(); + this.hiddenTextarea.style.left = style.left; + this.hiddenTextarea.style.top = style.top; + this.hiddenTextarea.style.fontSize = style.fontSize; + } + }, + + /** + * @private + * @return {Object} style contains style for hiddenTextarea + */ + _calcTextareaPosition: function() { + if (!this.canvas) { + return { x: 1, y: 1 }; + } + var chars = this.text.split(''), + boundaries = this._getCursorBoundaries(chars, 'cursor'), + cursorLocation = this.get2DCursorLocation(), + lineIndex = cursorLocation.lineIndex, + charIndex = cursorLocation.charIndex, + charHeight = this.getCurrentCharFontSize(lineIndex, charIndex), + leftOffset = (lineIndex === 0 && charIndex === 0) + ? this._getLineLeftOffset(this._getLineWidth(this.ctx, lineIndex)) + : boundaries.leftOffset, + m = this.calcTransformMatrix(), + p = { + x: boundaries.left + leftOffset, + y: boundaries.top + boundaries.topOffset + charHeight + }, + upperCanvas = this.canvas.upperCanvasEl, + maxWidth = upperCanvas.width - charHeight, + maxHeight = upperCanvas.height - charHeight; + + p = fabric.util.transformPoint(p, m); + p = fabric.util.transformPoint(p, this.canvas.viewportTransform); + + if (p.x < 0) { + p.x = 0; + } + if (p.x > maxWidth) { + p.x = maxWidth; + } + if (p.y < 0) { + p.y = 0; + } + if (p.y > maxHeight) { + p.y = maxHeight; + } + + // add canvas offset on document + p.x += this.canvas._offset.left; + p.y += this.canvas._offset.top; + + return { left: p.x + 'px', top: p.y + 'px', fontSize: charHeight }; + }, + + /** + * @private + */ + _saveEditingProps: function() { + this._savedProps = { + hasControls: this.hasControls, + borderColor: this.borderColor, + lockMovementX: this.lockMovementX, + lockMovementY: this.lockMovementY, + hoverCursor: this.hoverCursor, + defaultCursor: this.canvas && this.canvas.defaultCursor, + moveCursor: this.canvas && this.canvas.moveCursor + }; + }, + + /** + * @private + */ + _restoreEditingProps: function() { + if (!this._savedProps) { + return; + } + + this.hoverCursor = this._savedProps.overCursor; + this.hasControls = this._savedProps.hasControls; + this.borderColor = this._savedProps.borderColor; + this.lockMovementX = this._savedProps.lockMovementX; + this.lockMovementY = this._savedProps.lockMovementY; + + if (this.canvas) { + this.canvas.defaultCursor = this._savedProps.defaultCursor; + this.canvas.moveCursor = this._savedProps.moveCursor; + } + }, + + /** + * Exits from editing state + * @return {fabric.IText} thisArg + * @chainable + */ + exitEditing: function() { + var isTextChanged = (this._textBeforeEdit !== this.text); + this.selected = false; + this.isEditing = false; + this.selectable = true; + + this.selectionEnd = this.selectionStart; + this.hiddenTextarea && this.canvas && this.hiddenTextarea.parentNode.removeChild(this.hiddenTextarea); + this.hiddenTextarea = null; + + this.abortCursorAnimation(); + this._restoreEditingProps(); + this._currentCursorOpacity = 0; + + this.fire('editing:exited'); + isTextChanged && this.fire('modified'); + if (this.canvas) { + this.canvas.off('mouse:move', this.mouseMoveHandler); + this.canvas.fire('text:editing:exited', { target: this }); + isTextChanged && this.canvas.fire('object:modified', { target: this }); + } + + return this; + }, + + /** + * @private + */ + _removeExtraneousStyles: function() { + for (var prop in this.styles) { + if (!this._textLines[prop]) { + delete this.styles[prop]; + } + } + }, + + /** + * @private + */ + _removeCharsFromTo: function(start, end) { + while (end !== start) { + this._removeSingleCharAndStyle(start + 1); + end--; + } + this.selectionStart = start; + this.selectionEnd = start; + }, + + _removeSingleCharAndStyle: function(index) { + var isBeginningOfLine = this.text[index - 1] === '\n', + indexStyle = isBeginningOfLine ? index : index - 1; + this.removeStyleObject(isBeginningOfLine, indexStyle); + this.text = this.text.slice(0, index - 1) + + this.text.slice(index); + + this._textLines = this._splitTextIntoLines(); + }, + + /** + * Inserts characters where cursor is (replacing selection if one exists) + * @param {String} _chars Characters to insert + * @param {Boolean} useCopiedStyle use fabric.copiedTextStyle + */ + insertChars: function(_chars, useCopiedStyle) { + var style; + + if (this.selectionEnd - this.selectionStart > 1) { + this._removeCharsFromTo(this.selectionStart, this.selectionEnd); + } + //short circuit for block paste + if (!useCopiedStyle && this.isEmptyStyles()) { + this.insertChar(_chars, false); + return; + } + for (var i = 0, len = _chars.length; i < len; i++) { + if (useCopiedStyle) { + style = fabric.copiedTextStyle[i]; + } + this.insertChar(_chars[i], i < len - 1, style); + } + }, + + /** + * Inserts a character where cursor is + * @param {String} _char Characters to insert + * @param {Boolean} skipUpdate trigger rendering and updates at the end of text insert + * @param {Object} styleObject Style to be inserted for the new char + */ + insertChar: function(_char, skipUpdate, styleObject) { + var isEndOfLine = this.text[this.selectionStart] === '\n'; + this.text = this.text.slice(0, this.selectionStart) + + _char + this.text.slice(this.selectionEnd); + this._textLines = this._splitTextIntoLines(); + this.insertStyleObjects(_char, isEndOfLine, styleObject); + this.selectionStart += _char.length; + this.selectionEnd = this.selectionStart; + if (skipUpdate) { + return; + } + this._updateTextarea(); + this.setCoords(); + this._fireSelectionChanged(); + this.fire('changed'); + this.canvas && this.canvas.fire('text:changed', { target: this }); + this.canvas && this.canvas.renderAll(); + }, + + /** + * Inserts new style object + * @param {Number} lineIndex Index of a line + * @param {Number} charIndex Index of a char + * @param {Boolean} isEndOfLine True if it's end of line + */ + insertNewlineStyleObject: function(lineIndex, charIndex, isEndOfLine) { + + this.shiftLineStyles(lineIndex, +1); + + if (!this.styles[lineIndex + 1]) { + this.styles[lineIndex + 1] = {}; + } + + var currentCharStyle = {}, + newLineStyles = {}; + + if (this.styles[lineIndex] && this.styles[lineIndex][charIndex - 1]) { + currentCharStyle = this.styles[lineIndex][charIndex - 1]; + } + + // if there's nothing after cursor, + // we clone current char style onto the next (otherwise empty) line + if (isEndOfLine) { + newLineStyles[0] = clone(currentCharStyle); + this.styles[lineIndex + 1] = newLineStyles; + } + // otherwise we clone styles of all chars + // after cursor onto the next line, from the beginning + else { + for (var index in this.styles[lineIndex]) { + if (parseInt(index, 10) >= charIndex) { + newLineStyles[parseInt(index, 10) - charIndex] = this.styles[lineIndex][index]; + // remove lines from the previous line since they're on a new line now + delete this.styles[lineIndex][index]; + } + } + this.styles[lineIndex + 1] = newLineStyles; + } + this._forceClearCache = true; + }, + + /** + * Inserts style object for a given line/char index + * @param {Number} lineIndex Index of a line + * @param {Number} charIndex Index of a char + * @param {Object} [style] Style object to insert, if given + */ + insertCharStyleObject: function(lineIndex, charIndex, style) { + + var currentLineStyles = this.styles[lineIndex], + currentLineStylesCloned = clone(currentLineStyles); + + if (charIndex === 0 && !style) { + charIndex = 1; + } + + // shift all char styles by 1 forward + // 0,1,2,3 -> (charIndex=2) -> 0,1,3,4 -> (insert 2) -> 0,1,2,3,4 + for (var index in currentLineStylesCloned) { + var numericIndex = parseInt(index, 10); + + if (numericIndex >= charIndex) { + currentLineStyles[numericIndex + 1] = currentLineStylesCloned[numericIndex]; + + // only delete the style if there was nothing moved there + if (!currentLineStylesCloned[numericIndex - 1]) { + delete currentLineStyles[numericIndex]; + } + } + } + + this.styles[lineIndex][charIndex] = + style || clone(currentLineStyles[charIndex - 1]); + this._forceClearCache = true; + }, + + /** + * Inserts style object(s) + * @param {String} _chars Characters at the location where style is inserted + * @param {Boolean} isEndOfLine True if it's end of line + * @param {Object} [styleObject] Style to insert + */ + insertStyleObjects: function(_chars, isEndOfLine, styleObject) { + // removed shortcircuit over isEmptyStyles + + var cursorLocation = this.get2DCursorLocation(), + lineIndex = cursorLocation.lineIndex, + charIndex = cursorLocation.charIndex; + + if (!this._getLineStyle(lineIndex)) { + this._setLineStyle(lineIndex, {}); + } + + if (_chars === '\n') { + this.insertNewlineStyleObject(lineIndex, charIndex, isEndOfLine); + } + else { + this.insertCharStyleObject(lineIndex, charIndex, styleObject); + } + }, + + /** + * Shifts line styles up or down + * @param {Number} lineIndex Index of a line + * @param {Number} offset Can be -1 or +1 + */ + shiftLineStyles: function(lineIndex, offset) { + // shift all line styles by 1 upward + var clonedStyles = clone(this.styles); + for (var line in this.styles) { + var numericLine = parseInt(line, 10); + if (numericLine > lineIndex) { + this.styles[numericLine + offset] = clonedStyles[numericLine]; + if (!clonedStyles[numericLine - offset]) { + delete this.styles[numericLine]; + } + } + } + //TODO: evaluate if delete old style lines with offset -1 + }, + + /** + * Removes style object + * @param {Boolean} isBeginningOfLine True if cursor is at the beginning of line + * @param {Number} [index] Optional index. When not given, current selectionStart is used. + */ + removeStyleObject: function(isBeginningOfLine, index) { + + var cursorLocation = this.get2DCursorLocation(index), + lineIndex = cursorLocation.lineIndex, + charIndex = cursorLocation.charIndex; + + this._removeStyleObject(isBeginningOfLine, cursorLocation, lineIndex, charIndex); + }, + + _getTextOnPreviousLine: function(lIndex) { + return this._textLines[lIndex - 1]; + }, + + _removeStyleObject: function(isBeginningOfLine, cursorLocation, lineIndex, charIndex) { + + if (isBeginningOfLine) { + var textOnPreviousLine = this._getTextOnPreviousLine(cursorLocation.lineIndex), + newCharIndexOnPrevLine = textOnPreviousLine ? textOnPreviousLine.length : 0; + + if (!this.styles[lineIndex - 1]) { + this.styles[lineIndex - 1] = {}; + } + for (charIndex in this.styles[lineIndex]) { + this.styles[lineIndex - 1][parseInt(charIndex, 10) + newCharIndexOnPrevLine] + = this.styles[lineIndex][charIndex]; + } + this.shiftLineStyles(cursorLocation.lineIndex, -1); + } + else { + var currentLineStyles = this.styles[lineIndex]; + + if (currentLineStyles) { + delete currentLineStyles[charIndex]; + } + var currentLineStylesCloned = clone(currentLineStyles); + // shift all styles by 1 backwards + for (var i in currentLineStylesCloned) { + var numericIndex = parseInt(i, 10); + if (numericIndex >= charIndex && numericIndex !== 0) { + currentLineStyles[numericIndex - 1] = currentLineStylesCloned[numericIndex]; + delete currentLineStyles[numericIndex]; + } + } + } + }, + + /** + * Inserts new line + */ + insertNewline: function() { + this.insertChars('\n'); + }, + + /** + * Set the selectionStart and selectionEnd according to the ne postion of cursor + * mimic the key - mouse navigation when shift is pressed. + */ + setSelectionStartEndWithShift: function(start, end, newSelection) { + if (newSelection <= start) { + if (end === start) { + this._selectionDirection = 'left'; + } + else if (this._selectionDirection === 'right') { + this._selectionDirection = 'left'; + this.selectionEnd = start; + } + this.selectionStart = newSelection; + } + else if (newSelection > start && newSelection < end) { + if (this._selectionDirection === 'right') { + this.selectionEnd = newSelection; + } + else { + this.selectionStart = newSelection; + } + } + else { + // newSelection is > selection start and end + if (end === start) { + this._selectionDirection = 'right'; + } + else if (this._selectionDirection === 'left') { + this._selectionDirection = 'right'; + this.selectionStart = end; + } + this.selectionEnd = newSelection; + } + }, + + setSelectionInBoundaries: function() { + var length = this.text.length; + if (this.selectionStart > length) { + this.selectionStart = length; + } + else if (this.selectionStart < 0) { + this.selectionStart = 0; + } + if (this.selectionEnd > length) { + this.selectionEnd = length; + } + else if (this.selectionEnd < 0) { + this.selectionEnd = 0; + } + } + }); +})(); + + +fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.prototype */ { + /** + * Initializes "dbclick" event handler + */ + initDoubleClickSimulation: function() { + + // for double click + this.__lastClickTime = +new Date(); + + // for triple click + this.__lastLastClickTime = +new Date(); + + this.__lastPointer = { }; + + this.on('mousedown', this.onMouseDown.bind(this)); + }, + + onMouseDown: function(options) { + + this.__newClickTime = +new Date(); + var newPointer = this.canvas.getPointer(options.e); + + if (this.isTripleClick(newPointer)) { + this.fire('tripleclick', options); + this._stopEvent(options.e); + } + else if (this.isDoubleClick(newPointer)) { + this.fire('dblclick', options); + this._stopEvent(options.e); + } + + this.__lastLastClickTime = this.__lastClickTime; + this.__lastClickTime = this.__newClickTime; + this.__lastPointer = newPointer; + this.__lastIsEditing = this.isEditing; + this.__lastSelected = this.selected; + }, + + isDoubleClick: function(newPointer) { + return this.__newClickTime - this.__lastClickTime < 500 && + this.__lastPointer.x === newPointer.x && + this.__lastPointer.y === newPointer.y && this.__lastIsEditing; + }, + + isTripleClick: function(newPointer) { + return this.__newClickTime - this.__lastClickTime < 500 && + this.__lastClickTime - this.__lastLastClickTime < 500 && + this.__lastPointer.x === newPointer.x && + this.__lastPointer.y === newPointer.y; + }, + + /** + * @private + */ + _stopEvent: function(e) { + e.preventDefault && e.preventDefault(); + e.stopPropagation && e.stopPropagation(); + }, + + /** + * Initializes event handlers related to cursor or selection + */ + initCursorSelectionHandlers: function() { + this.initSelectedHandler(); + this.initMousedownHandler(); + this.initMouseupHandler(); + this.initClicks(); + }, + + /** + * Initializes double and triple click event handlers + */ + initClicks: function() { + this.on('dblclick', function(options) { + this.selectWord(this.getSelectionStartFromPointer(options.e)); + }); + this.on('tripleclick', function(options) { + this.selectLine(this.getSelectionStartFromPointer(options.e)); + }); + }, + + /** + * Initializes "mousedown" event handler + */ + initMousedownHandler: function() { + this.on('mousedown', function(options) { + if (!this.editable) { + return; + } + var pointer = this.canvas.getPointer(options.e); + + this.__mousedownX = pointer.x; + this.__mousedownY = pointer.y; + this.__isMousedown = true; + + if (this.selected) { + this.setCursorByClick(options.e); + } + + if (this.isEditing) { + this.__selectionStartOnMouseDown = this.selectionStart; + if (this.selectionStart === this.selectionEnd) { + this.abortCursorAnimation(); + } + this.renderCursorOrSelection(); + } + }); + }, + + /** + * @private + */ + _isObjectMoved: function(e) { + var pointer = this.canvas.getPointer(e); + + return this.__mousedownX !== pointer.x || + this.__mousedownY !== pointer.y; + }, + + /** + * Initializes "mouseup" event handler + */ + initMouseupHandler: function() { + this.on('mouseup', function(options) { + this.__isMousedown = false; + if (!this.editable || this._isObjectMoved(options.e)) { + return; + } + + if (this.__lastSelected && !this.__corner) { + this.enterEditing(options.e); + if (this.selectionStart === this.selectionEnd) { + this.initDelayedCursor(true); + } + else { + this.renderCursorOrSelection(); + } + } + this.selected = true; + }); + }, + + /** + * Changes cursor location in a text depending on passed pointer (x/y) object + * @param {Event} e Event object + */ + setCursorByClick: function(e) { + var newSelection = this.getSelectionStartFromPointer(e), + start = this.selectionStart, end = this.selectionEnd; + if (e.shiftKey) { + this.setSelectionStartEndWithShift(start, end, newSelection); + } + else { + this.selectionStart = newSelection; + this.selectionEnd = newSelection; + } + this._fireSelectionChanged(); + this._updateTextarea(); + }, + + /** + * Returns index of a character corresponding to where an object was clicked + * @param {Event} e Event object + * @return {Number} Index of a character + */ + getSelectionStartFromPointer: function(e) { + var mouseOffset = this.getLocalPointer(e), + prevWidth = 0, + width = 0, + height = 0, + charIndex = 0, + newSelectionStart, + line; + + for (var i = 0, len = this._textLines.length; i < len; i++) { + line = this._textLines[i]; + height += this._getHeightOfLine(this.ctx, i) * this.scaleY; + + var widthOfLine = this._getLineWidth(this.ctx, i), + lineLeftOffset = this._getLineLeftOffset(widthOfLine); + + width = lineLeftOffset * this.scaleX; + + for (var j = 0, jlen = line.length; j < jlen; j++) { + + prevWidth = width; + + width += this._getWidthOfChar(this.ctx, line[j], i, this.flipX ? jlen - j : j) * + this.scaleX; + + if (height <= mouseOffset.y || width <= mouseOffset.x) { + charIndex++; + continue; + } + + return this._getNewSelectionStartFromOffset( + mouseOffset, prevWidth, width, charIndex + i, jlen); + } + + if (mouseOffset.y < height) { + //this happens just on end of lines. + return this._getNewSelectionStartFromOffset( + mouseOffset, prevWidth, width, charIndex + i - 1, jlen); + } + } + + // clicked somewhere after all chars, so set at the end + if (typeof newSelectionStart === 'undefined') { + return this.text.length; + } + }, + + /** + * @private + */ + _getNewSelectionStartFromOffset: function(mouseOffset, prevWidth, width, index, jlen) { + + var distanceBtwLastCharAndCursor = mouseOffset.x - prevWidth, + distanceBtwNextCharAndCursor = width - mouseOffset.x, + offset = distanceBtwNextCharAndCursor > distanceBtwLastCharAndCursor ? 0 : 1, + newSelectionStart = index + offset; + + // if object is horizontally flipped, mirror cursor location from the end + if (this.flipX) { + newSelectionStart = jlen - newSelectionStart; + } + + if (newSelectionStart > this.text.length) { + newSelectionStart = this.text.length; + } + + return newSelectionStart; + } +}); + + +fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.prototype */ { + + /** + * Initializes hidden textarea (needed to bring up keyboard in iOS) + */ + initHiddenTextarea: function() { + this.hiddenTextarea = fabric.document.createElement('textarea'); + this.hiddenTextarea.setAttribute('autocapitalize', 'off'); + var style = this._calcTextareaPosition(); + this.hiddenTextarea.style.cssText = 'position: absolute; top: ' + style.top + '; left: ' + style.left + ';' + + ' opacity: 0; width: 0px; height: 0px; z-index: -999;'; + fabric.document.body.appendChild(this.hiddenTextarea); + + fabric.util.addListener(this.hiddenTextarea, 'keydown', this.onKeyDown.bind(this)); + fabric.util.addListener(this.hiddenTextarea, 'keyup', this.onKeyUp.bind(this)); + fabric.util.addListener(this.hiddenTextarea, 'input', this.onInput.bind(this)); + fabric.util.addListener(this.hiddenTextarea, 'copy', this.copy.bind(this)); + fabric.util.addListener(this.hiddenTextarea, 'cut', this.cut.bind(this)); + fabric.util.addListener(this.hiddenTextarea, 'paste', this.paste.bind(this)); + fabric.util.addListener(this.hiddenTextarea, 'compositionstart', this.onCompositionStart.bind(this)); + fabric.util.addListener(this.hiddenTextarea, 'compositionupdate', this.onCompositionUpdate.bind(this)); + fabric.util.addListener(this.hiddenTextarea, 'compositionend', this.onCompositionEnd.bind(this)); + + if (!this._clickHandlerInitialized && this.canvas) { + fabric.util.addListener(this.canvas.upperCanvasEl, 'click', this.onClick.bind(this)); + this._clickHandlerInitialized = true; + } + }, + + /** + * @private + */ + _keysMap: { + 8: 'removeChars', + 9: 'exitEditing', + 27: 'exitEditing', + 13: 'insertNewline', + 33: 'moveCursorUp', + 34: 'moveCursorDown', + 35: 'moveCursorRight', + 36: 'moveCursorLeft', + 37: 'moveCursorLeft', + 38: 'moveCursorUp', + 39: 'moveCursorRight', + 40: 'moveCursorDown', + 46: 'forwardDelete' + }, + + /** + * @private + */ + _ctrlKeysMapUp: { + 67: 'copy', + 88: 'cut' + }, + + /** + * @private + */ + _ctrlKeysMapDown: { + 65: 'selectAll' + }, + + onClick: function() { + // No need to trigger click event here, focus is enough to have the keyboard appear on Android + this.hiddenTextarea && this.hiddenTextarea.focus(); + }, + + /** + * Handles keyup event + * @param {Event} e Event object + */ + onKeyDown: function(e) { + if (!this.isEditing) { + return; + } + if (e.keyCode in this._keysMap) { + this[this._keysMap[e.keyCode]](e); + } + else if ((e.keyCode in this._ctrlKeysMapDown) && (e.ctrlKey || e.metaKey)) { + this[this._ctrlKeysMapDown[e.keyCode]](e); + } + else { + return; + } + e.stopImmediatePropagation(); + e.preventDefault(); + this.canvas && this.canvas.renderAll(); + }, + + /** + * Handles keyup event + * We handle KeyUp because ie11 and edge have difficulties copy/pasting + * if a copy/cut event fired, keyup is dismissed + * @param {Event} e Event object + */ + onKeyUp: function(e) { + if (!this.isEditing || this._copyDone) { + this._copyDone = false; + return; + } + if ((e.keyCode in this._ctrlKeysMapUp) && (e.ctrlKey || e.metaKey)) { + this[this._ctrlKeysMapUp[e.keyCode]](e); + } + else { + return; + } + e.stopImmediatePropagation(); + e.preventDefault(); + this.canvas && this.canvas.renderAll(); + }, + + /** + * Handles onInput event + * @param {Event} e Event object + */ + onInput: function(e) { + if (!this.isEditing || this.inCompositionMode) { + return; + } + var offset = this.selectionStart || 0, + offsetEnd = this.selectionEnd || 0, + textLength = this.text.length, + newTextLength = this.hiddenTextarea.value.length, + diff, charsToInsert, start; + if (newTextLength > textLength) { + //we added some character + start = this._selectionDirection === 'left' ? offsetEnd : offset; + diff = newTextLength - textLength; + charsToInsert = this.hiddenTextarea.value.slice(start, start + diff); + } + else { + //we selected a portion of text and then input something else. + //Internet explorer does not trigger this else + diff = newTextLength - textLength + offsetEnd - offset; + charsToInsert = this.hiddenTextarea.value.slice(offset, offset + diff); + } + this.insertChars(charsToInsert); + e.stopPropagation(); + }, + + /** + * Composition start + */ + onCompositionStart: function() { + this.inCompositionMode = true; + this.prevCompositionLength = 0; + this.compositionStart = this.selectionStart; + }, + + /** + * Composition end + */ + onCompositionEnd: function() { + this.inCompositionMode = false; + }, + + /** + * Composition update + */ + onCompositionUpdate: function(e) { + var data = e.data; + this.selectionStart = this.compositionStart; + this.selectionEnd = this.selectionEnd === this.selectionStart ? + this.compositionStart + this.prevCompositionLength : this.selectionEnd; + this.insertChars(data, false); + this.prevCompositionLength = data.length; + }, + + /** + * Forward delete + */ + forwardDelete: function(e) { + if (this.selectionStart === this.selectionEnd) { + if (this.selectionStart === this.text.length) { + return; + } + this.moveCursorRight(e); + } + this.removeChars(e); + }, + + /** + * Copies selected text + * @param {Event} e Event object + */ + copy: function(e) { + if (this.selectionStart === this.selectionEnd) { + //do not cut-copy if no selection + return; + } + var selectedText = this.getSelectedText(), + clipboardData = this._getClipboardData(e); + + // Check for backward compatibility with old browsers + if (clipboardData) { + clipboardData.setData('text', selectedText); + } + + fabric.copiedText = selectedText; + fabric.copiedTextStyle = this.getSelectionStyles( + this.selectionStart, + this.selectionEnd); + e.stopImmediatePropagation(); + e.preventDefault(); + this._copyDone = true; + }, + + /** + * Pastes text + * @param {Event} e Event object + */ + paste: function(e) { + var copiedText = null, + clipboardData = this._getClipboardData(e), + useCopiedStyle = true; + + // Check for backward compatibility with old browsers + if (clipboardData) { + copiedText = clipboardData.getData('text').replace(/\r/g, ''); + if (!fabric.copiedTextStyle || fabric.copiedText !== copiedText) { + useCopiedStyle = false; + } + } + else { + copiedText = fabric.copiedText; + } + + if (copiedText) { + this.insertChars(copiedText, useCopiedStyle); + } + e.stopImmediatePropagation(); + e.preventDefault(); + }, + + /** + * Cuts text + * @param {Event} e Event object + */ + cut: function(e) { + if (this.selectionStart === this.selectionEnd) { + return; + } + + this.copy(e); + this.removeChars(e); + }, + + /** + * @private + * @param {Event} e Event object + * @return {Object} Clipboard data object + */ + _getClipboardData: function(e) { + return (e && e.clipboardData) || fabric.window.clipboardData; + }, + + /** + * Finds the width in pixels before the cursor on the same line + * @private + * @param {Number} lineIndex + * @param {Number} charIndex + * @return {Number} widthBeforeCursor width before cursor + */ + _getWidthBeforeCursor: function(lineIndex, charIndex) { + var textBeforeCursor = this._textLines[lineIndex].slice(0, charIndex), + widthOfLine = this._getLineWidth(this.ctx, lineIndex), + widthBeforeCursor = this._getLineLeftOffset(widthOfLine), _char; + + for (var i = 0, len = textBeforeCursor.length; i < len; i++) { + _char = textBeforeCursor[i]; + widthBeforeCursor += this._getWidthOfChar(this.ctx, _char, lineIndex, i); + } + return widthBeforeCursor; + }, + + /** + * Gets start offset of a selection + * @param {Event} e Event object + * @param {Boolean} isRight + * @return {Number} + */ + getDownCursorOffset: function(e, isRight) { + var selectionProp = this._getSelectionForOffset(e, isRight), + cursorLocation = this.get2DCursorLocation(selectionProp), + lineIndex = cursorLocation.lineIndex; + // if on last line, down cursor goes to end of line + if (lineIndex === this._textLines.length - 1 || e.metaKey || e.keyCode === 34) { + // move to the end of a text + return this.text.length - selectionProp; + } + var charIndex = cursorLocation.charIndex, + widthBeforeCursor = this._getWidthBeforeCursor(lineIndex, charIndex), + indexOnOtherLine = this._getIndexOnLine(lineIndex + 1, widthBeforeCursor), + textAfterCursor = this._textLines[lineIndex].slice(charIndex); + + return textAfterCursor.length + indexOnOtherLine + 2; + }, + + /** + * private + * Helps finding if the offset should be counted from Start or End + * @param {Event} e Event object + * @param {Boolean} isRight + * @return {Number} + */ + _getSelectionForOffset: function(e, isRight) { + if (e.shiftKey && this.selectionStart !== this.selectionEnd && isRight) { + return this.selectionEnd; + } + else { + return this.selectionStart; + } + }, + + /** + * @param {Event} e Event object + * @param {Boolean} isRight + * @return {Number} + */ + getUpCursorOffset: function(e, isRight) { + var selectionProp = this._getSelectionForOffset(e, isRight), + cursorLocation = this.get2DCursorLocation(selectionProp), + lineIndex = cursorLocation.lineIndex; + if (lineIndex === 0 || e.metaKey || e.keyCode === 33) { + // if on first line, up cursor goes to start of line + return -selectionProp; + } + var charIndex = cursorLocation.charIndex, + widthBeforeCursor = this._getWidthBeforeCursor(lineIndex, charIndex), + indexOnOtherLine = this._getIndexOnLine(lineIndex - 1, widthBeforeCursor), + textBeforeCursor = this._textLines[lineIndex].slice(0, charIndex); + // return a negative offset + return -this._textLines[lineIndex - 1].length + indexOnOtherLine - textBeforeCursor.length; + }, + + /** + * find for a given width it founds the matching character. + * @private + */ + _getIndexOnLine: function(lineIndex, width) { + + var widthOfLine = this._getLineWidth(this.ctx, lineIndex), + textOnLine = this._textLines[lineIndex], + lineLeftOffset = this._getLineLeftOffset(widthOfLine), + widthOfCharsOnLine = lineLeftOffset, + indexOnLine = 0, + foundMatch; + + for (var j = 0, jlen = textOnLine.length; j < jlen; j++) { + + var _char = textOnLine[j], + widthOfChar = this._getWidthOfChar(this.ctx, _char, lineIndex, j); + + widthOfCharsOnLine += widthOfChar; + + if (widthOfCharsOnLine > width) { + + foundMatch = true; + + var leftEdge = widthOfCharsOnLine - widthOfChar, + rightEdge = widthOfCharsOnLine, + offsetFromLeftEdge = Math.abs(leftEdge - width), + offsetFromRightEdge = Math.abs(rightEdge - width); + + indexOnLine = offsetFromRightEdge < offsetFromLeftEdge ? j : (j - 1); + + break; + } + } + + // reached end + if (!foundMatch) { + indexOnLine = textOnLine.length - 1; + } + + return indexOnLine; + }, + + + /** + * Moves cursor down + * @param {Event} e Event object + */ + moveCursorDown: function(e) { + if (this.selectionStart >= this.text.length && this.selectionEnd >= this.text.length) { + return; + } + this._moveCursorUpOrDown('Down', e); + }, + + /** + * Moves cursor up + * @param {Event} e Event object + */ + moveCursorUp: function(e) { + if (this.selectionStart === 0 && this.selectionEnd === 0) { + return; + } + this._moveCursorUpOrDown('Up', e); + }, + + /** + * Moves cursor up or down, fires the events + * @param {String} direction 'Up' or 'Down' + * @param {Event} e Event object + */ + _moveCursorUpOrDown: function(direction, e) { + // getUpCursorOffset + // getDownCursorOffset + var action = 'get' + direction + 'CursorOffset', + offset = this[action](e, this._selectionDirection === 'right'); + if (e.shiftKey) { + this.moveCursorWithShift(offset); + } + else { + this.moveCursorWithoutShift(offset); + } + if (offset !== 0) { + this.setSelectionInBoundaries(); + this.abortCursorAnimation(); + this._currentCursorOpacity = 1; + this.initDelayedCursor(); + this._fireSelectionChanged(); + this._updateTextarea(); + } + }, + + /** + * Moves cursor with shift + * @param {Number} offset + */ + moveCursorWithShift: function(offset) { + var newSelection = this._selectionDirection === 'left' + ? this.selectionStart + offset + : this.selectionEnd + offset; + this.setSelectionStartEndWithShift(this.selectionStart, this.selectionEnd, newSelection); + return offset !== 0; + }, + + /** + * Moves cursor up without shift + * @param {Number} offset + */ + moveCursorWithoutShift: function(offset) { + if (offset < 0) { + this.selectionStart += offset; + this.selectionEnd = this.selectionStart; + } + else { + this.selectionEnd += offset; + this.selectionStart = this.selectionEnd; + } + return offset !== 0; + }, + + /** + * Moves cursor left + * @param {Event} e Event object + */ + moveCursorLeft: function(e) { + if (this.selectionStart === 0 && this.selectionEnd === 0) { + return; + } + this._moveCursorLeftOrRight('Left', e); + }, + + /** + * @private + * @return {Boolean} true if a change happened + */ + _move: function(e, prop, direction) { + var newValue; + if (e.altKey) { + newValue = this['findWordBoundary' + direction](this[prop]); + } + else if (e.metaKey || e.keyCode === 35 || e.keyCode === 36 ) { + newValue = this['findLineBoundary' + direction](this[prop]); + } + else { + this[prop] += direction === 'Left' ? -1 : 1; + return true; + } + if (typeof newValue !== undefined && this[prop] !== newValue) { + this[prop] = newValue; + return true; + } + }, + + /** + * @private + */ + _moveLeft: function(e, prop) { + return this._move(e, prop, 'Left'); + }, + + /** + * @private + */ + _moveRight: function(e, prop) { + return this._move(e, prop, 'Right'); + }, + + /** + * Moves cursor left without keeping selection + * @param {Event} e + */ + moveCursorLeftWithoutShift: function(e) { + var change = true; + this._selectionDirection = 'left'; + + // only move cursor when there is no selection, + // otherwise we discard it, and leave cursor on same place + if (this.selectionEnd === this.selectionStart && this.selectionStart !== 0) { + change = this._moveLeft(e, 'selectionStart'); + + } + this.selectionEnd = this.selectionStart; + return change; + }, + + /** + * Moves cursor left while keeping selection + * @param {Event} e + */ + moveCursorLeftWithShift: function(e) { + if (this._selectionDirection === 'right' && this.selectionStart !== this.selectionEnd) { + return this._moveLeft(e, 'selectionEnd'); + } + else if (this.selectionStart !== 0){ + this._selectionDirection = 'left'; + return this._moveLeft(e, 'selectionStart'); + } + }, + + /** + * Moves cursor right + * @param {Event} e Event object + */ + moveCursorRight: function(e) { + if (this.selectionStart >= this.text.length && this.selectionEnd >= this.text.length) { + return; + } + this._moveCursorLeftOrRight('Right', e); + }, + + /** + * Moves cursor right or Left, fires event + * @param {String} direction 'Left', 'Right' + * @param {Event} e Event object + */ + _moveCursorLeftOrRight: function(direction, e) { + var actionName = 'moveCursor' + direction + 'With'; + this._currentCursorOpacity = 1; + + if (e.shiftKey) { + actionName += 'Shift'; + } + else { + actionName += 'outShift'; + } + if (this[actionName](e)) { + this.abortCursorAnimation(); + this.initDelayedCursor(); + this._fireSelectionChanged(); + this._updateTextarea(); + } + }, + + /** + * Moves cursor right while keeping selection + * @param {Event} e + */ + moveCursorRightWithShift: function(e) { + if (this._selectionDirection === 'left' && this.selectionStart !== this.selectionEnd) { + return this._moveRight(e, 'selectionStart'); + } + else if (this.selectionEnd !== this.text.length) { + this._selectionDirection = 'right'; + return this._moveRight(e, 'selectionEnd'); + } + }, + + /** + * Moves cursor right without keeping selection + * @param {Event} e Event object + */ + moveCursorRightWithoutShift: function(e) { + var changed = true; + this._selectionDirection = 'right'; + + if (this.selectionStart === this.selectionEnd) { + changed = this._moveRight(e, 'selectionStart'); + this.selectionEnd = this.selectionStart; + } + else { + this.selectionStart = this.selectionEnd; + } + return changed; + }, + + /** + * Removes characters selected by selection + * @param {Event} e Event object + */ + removeChars: function(e) { + if (this.selectionStart === this.selectionEnd) { + this._removeCharsNearCursor(e); + } + else { + this._removeCharsFromTo(this.selectionStart, this.selectionEnd); + } + + this.setSelectionEnd(this.selectionStart); + + this._removeExtraneousStyles(); + + this.canvas && this.canvas.renderAll(); + + this.setCoords(); + this.fire('changed'); + this.canvas && this.canvas.fire('text:changed', { target: this }); + }, + + /** + * @private + * @param {Event} e Event object + */ + _removeCharsNearCursor: function(e) { + if (this.selectionStart === 0) { + return; + } + if (e.metaKey) { + // remove all till the start of current line + var leftLineBoundary = this.findLineBoundaryLeft(this.selectionStart); + + this._removeCharsFromTo(leftLineBoundary, this.selectionStart); + this.setSelectionStart(leftLineBoundary); + } + else if (e.altKey) { + // remove all till the start of current word + var leftWordBoundary = this.findWordBoundaryLeft(this.selectionStart); + + this._removeCharsFromTo(leftWordBoundary, this.selectionStart); + this.setSelectionStart(leftWordBoundary); + } + else { + this._removeSingleCharAndStyle(this.selectionStart); + this.setSelectionStart(this.selectionStart - 1); + } + } +}); + + +/* _TO_SVG_START_ */ +(function() { + var toFixed = fabric.util.toFixed, + NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS; + + fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.prototype */ { + + /** + * @private + */ + _setSVGTextLineText: function(lineIndex, textSpans, height, textLeftOffset, textTopOffset, textBgRects) { + if (!this._getLineStyle(lineIndex)) { + fabric.Text.prototype._setSVGTextLineText.call(this, + lineIndex, textSpans, height, textLeftOffset, textTopOffset); + } + else { + this._setSVGTextLineChars( + lineIndex, textSpans, height, textLeftOffset, textBgRects); + } + }, + + /** + * @private + */ + _setSVGTextLineChars: function(lineIndex, textSpans, height, textLeftOffset, textBgRects) { + + var chars = this._textLines[lineIndex], + charOffset = 0, + lineLeftOffset = this._getLineLeftOffset(this._getLineWidth(this.ctx, lineIndex)) - this.width / 2, + lineOffset = this._getSVGLineTopOffset(lineIndex), + heightOfLine = this._getHeightOfLine(this.ctx, lineIndex); + + for (var i = 0, len = chars.length; i < len; i++) { + var styleDecl = this._getStyleDeclaration(lineIndex, i) || { }; + + textSpans.push( + this._createTextCharSpan( + chars[i], styleDecl, lineLeftOffset, lineOffset.lineTop + lineOffset.offset, charOffset)); + + var charWidth = this._getWidthOfChar(this.ctx, chars[i], lineIndex, i); + + if (styleDecl.textBackgroundColor) { + textBgRects.push( + this._createTextCharBg( + styleDecl, lineLeftOffset, lineOffset.lineTop, heightOfLine, charWidth, charOffset)); + } + + charOffset += charWidth; + } + }, + + /** + * @private + */ + _getSVGLineTopOffset: function(lineIndex) { + var lineTopOffset = 0, lastHeight = 0; + for (var j = 0; j < lineIndex; j++) { + lineTopOffset += this._getHeightOfLine(this.ctx, j); + } + lastHeight = this._getHeightOfLine(this.ctx, j); + return { + lineTop: lineTopOffset, + offset: (this._fontSizeMult - this._fontSizeFraction) * lastHeight / (this.lineHeight * this._fontSizeMult) + }; + }, + + /** + * @private + */ + _createTextCharBg: function(styleDecl, lineLeftOffset, lineTopOffset, heightOfLine, charWidth, charOffset) { + return [ + '\t\t\n' + ].join(''); + }, + + /** + * @private + */ + _createTextCharSpan: function(_char, styleDecl, lineLeftOffset, lineTopOffset, charOffset) { + + var fillStyles = this.getSvgStyles.call(fabric.util.object.extend({ + visible: true, + fill: this.fill, + stroke: this.stroke, + type: 'text', + getSvgFilter: fabric.Object.prototype.getSvgFilter + }, styleDecl)); + + return [ + '\t\t\t', + fabric.util.string.escapeXml(_char), + '\n' + ].join(''); + } + }); +})(); +/* _TO_SVG_END_ */ + + +(function(global) { + + 'use strict'; + + var fabric = global.fabric || (global.fabric = {}), + clone = fabric.util.object.clone; + + /** + * Textbox class, based on IText, allows the user to resize the text rectangle + * and wraps lines automatically. Textboxes have their Y scaling locked, the + * user can only change width. Height is adjusted automatically based on the + * wrapping of lines. + * @class fabric.Textbox + * @extends fabric.IText + * @mixes fabric.Observable + * @return {fabric.Textbox} thisArg + * @see {@link fabric.Textbox#initialize} for constructor definition + */ + fabric.Textbox = fabric.util.createClass(fabric.IText, fabric.Observable, { + + /** + * Type of an object + * @type String + * @default + */ + type: 'textbox', + + /** + * Minimum width of textbox, in pixels. + * @type Number + * @default + */ + minWidth: 20, + + /** + * Minimum calculated width of a textbox, in pixels. + * fixed to 2 so that an empty textbox cannot go to 0 + * and is still selectable without text. + * @type Number + * @default + */ + dynamicMinWidth: 2, + + /** + * Cached array of text wrapping. + * @type Array + */ + __cachedLines: null, + + /** + * Override standard Object class values + */ + lockScalingY: true, + + /** + * Override standard Object class values + */ + lockScalingFlip: true, + + /** + * Constructor. Some scaling related property values are forced. Visibility + * of controls is also fixed; only the rotation and width controls are + * made available. + * @param {String} text Text string + * @param {Object} [options] Options object + * @return {fabric.Textbox} thisArg + */ + initialize: function(text, options) { + this.ctx = fabric.util.createCanvasElement().getContext('2d'); + this.callSuper('initialize', text, options); + this.setControlsVisibility(fabric.Textbox.getTextboxControlVisibility()); + + // add width to this list of props that effect line wrapping. + this._dimensionAffectingProps.width = true; + }, + + /** + * Unlike superclass's version of this function, Textbox does not update + * its width. + * @param {CanvasRenderingContext2D} ctx Context to use for measurements + * @private + * @override + */ + _initDimensions: function(ctx) { + if (this.__skipDimension) { + return; + } + + if (!ctx) { + ctx = fabric.util.createCanvasElement().getContext('2d'); + this._setTextStyles(ctx); + } + + // clear dynamicMinWidth as it will be different after we re-wrap line + this.dynamicMinWidth = 0; + + // wrap lines + this._textLines = this._splitTextIntoLines(); + // if after wrapping, the width is smaller than dynamicMinWidth, change the width and re-wrap + if (this.dynamicMinWidth > this.width) { + this._set('width', this.dynamicMinWidth); + } + + // clear cache and re-calculate height + this._clearCache(); + this.height = this._getTextHeight(ctx); + }, + + /** + * Generate an object that translates the style object so that it is + * broken up by visual lines (new lines and automatic wrapping). + * The original text styles object is broken up by actual lines (new lines only), + * which is only sufficient for Text / IText + * @private + */ + _generateStyleMap: function() { + var realLineCount = 0, + realLineCharCount = 0, + charCount = 0, + map = {}; + + for (var i = 0; i < this._textLines.length; i++) { + if (this.text[charCount] === '\n' && i > 0) { + realLineCharCount = 0; + charCount++; + realLineCount++; + } + else if (this.text[charCount] === ' ' && i > 0) { + // this case deals with space's that are removed from end of lines when wrapping + realLineCharCount++; + charCount++; + } + + map[i] = { line: realLineCount, offset: realLineCharCount }; + + charCount += this._textLines[i].length; + realLineCharCount += this._textLines[i].length; + } + + return map; + }, + + /** + * @param {Number} lineIndex + * @param {Number} charIndex + * @param {Boolean} [returnCloneOrEmpty=false] + * @private + */ + _getStyleDeclaration: function(lineIndex, charIndex, returnCloneOrEmpty) { + if (this._styleMap) { + var map = this._styleMap[lineIndex]; + if (!map) { + return returnCloneOrEmpty ? { } : null; + } + lineIndex = map.line; + charIndex = map.offset + charIndex; + } + return this.callSuper('_getStyleDeclaration', lineIndex, charIndex, returnCloneOrEmpty); + }, + + /** + * @param {Number} lineIndex + * @param {Number} charIndex + * @param {Object} style + * @private + */ + _setStyleDeclaration: function(lineIndex, charIndex, style) { + var map = this._styleMap[lineIndex]; + lineIndex = map.line; + charIndex = map.offset + charIndex; + + this.styles[lineIndex][charIndex] = style; + }, + + /** + * @param {Number} lineIndex + * @param {Number} charIndex + * @private + */ + _deleteStyleDeclaration: function(lineIndex, charIndex) { + var map = this._styleMap[lineIndex]; + lineIndex = map.line; + charIndex = map.offset + charIndex; + + delete this.styles[lineIndex][charIndex]; + }, + + /** + * @param {Number} lineIndex + * @private + */ + _getLineStyle: function(lineIndex) { + var map = this._styleMap[lineIndex]; + return this.styles[map.line]; + }, + + /** + * @param {Number} lineIndex + * @param {Object} style + * @private + */ + _setLineStyle: function(lineIndex, style) { + var map = this._styleMap[lineIndex]; + this.styles[map.line] = style; + }, + + /** + * @param {Number} lineIndex + * @private + */ + _deleteLineStyle: function(lineIndex) { + var map = this._styleMap[lineIndex]; + delete this.styles[map.line]; + }, + + /** + * Wraps text using the 'width' property of Textbox. First this function + * splits text on newlines, so we preserve newlines entered by the user. + * Then it wraps each line using the width of the Textbox by calling + * _wrapLine(). + * @param {CanvasRenderingContext2D} ctx Context to use for measurements + * @param {String} text The string of text that is split into lines + * @returns {Array} Array of lines + */ + _wrapText: function(ctx, text) { + var lines = text.split(this._reNewline), wrapped = [], i; + + for (i = 0; i < lines.length; i++) { + wrapped = wrapped.concat(this._wrapLine(ctx, lines[i], i)); + } + + return wrapped; + }, + + /** + * Helper function to measure a string of text, given its lineIndex and charIndex offset + * + * @param {CanvasRenderingContext2D} ctx + * @param {String} text + * @param {number} lineIndex + * @param {number} charOffset + * @returns {number} + * @private + */ + _measureText: function(ctx, text, lineIndex, charOffset) { + var width = 0; + charOffset = charOffset || 0; + for (var i = 0, len = text.length; i < len; i++) { + width += this._getWidthOfChar(ctx, text[i], lineIndex, i + charOffset); + } + return width; + }, + + /** + * Wraps a line of text using the width of the Textbox and a context. + * @param {CanvasRenderingContext2D} ctx Context to use for measurements + * @param {String} text The string of text to split into lines + * @param {Number} lineIndex + * @returns {Array} Array of line(s) into which the given text is wrapped + * to. + */ + _wrapLine: function(ctx, text, lineIndex) { + var lineWidth = 0, + lines = [], + line = '', + words = text.split(' '), + word = '', + offset = 0, + infix = ' ', + wordWidth = 0, + infixWidth = 0, + largestWordWidth = 0, + lineJustStarted = true, + additionalSpace = this._getWidthOfCharSpacing(); + + for (var i = 0; i < words.length; i++) { + word = words[i]; + wordWidth = this._measureText(ctx, word, lineIndex, offset); + + offset += word.length; + + lineWidth += infixWidth + wordWidth - additionalSpace; + + if (lineWidth >= this.width && !lineJustStarted) { + lines.push(line); + line = ''; + lineWidth = wordWidth; + lineJustStarted = true; + } + else { + lineWidth += additionalSpace; + } + + if (!lineJustStarted) { + line += infix; + } + line += word; + + infixWidth = this._measureText(ctx, infix, lineIndex, offset); + offset++; + lineJustStarted = false; + // keep track of largest word + if (wordWidth > largestWordWidth) { + largestWordWidth = wordWidth; + } + } + + i && lines.push(line); + + if (largestWordWidth > this.dynamicMinWidth) { + this.dynamicMinWidth = largestWordWidth - additionalSpace; + } + + return lines; + }, + /** + * Gets lines of text to render in the Textbox. This function calculates + * text wrapping on the fly everytime it is called. + * @returns {Array} Array of lines in the Textbox. + * @override + */ + _splitTextIntoLines: function() { + var originalAlign = this.textAlign; + this.ctx.save(); + this._setTextStyles(this.ctx); + this.textAlign = 'left'; + var lines = this._wrapText(this.ctx, this.text); + this.textAlign = originalAlign; + this.ctx.restore(); + this._textLines = lines; + this._styleMap = this._generateStyleMap(); + return lines; + }, + + /** + * When part of a group, we don't want the Textbox's scale to increase if + * the group's increases. That's why we reduce the scale of the Textbox by + * the amount that the group's increases. This is to maintain the effective + * scale of the Textbox at 1, so that font-size values make sense. Otherwise + * the same font-size value would result in different actual size depending + * on the value of the scale. + * @param {String} key + * @param {*} value + */ + setOnGroup: function(key, value) { + if (key === 'scaleX') { + this.set('scaleX', Math.abs(1 / value)); + this.set('width', (this.get('width') * value) / + (typeof this.__oldScaleX === 'undefined' ? 1 : this.__oldScaleX)); + this.__oldScaleX = value; + } + }, + + /** + * Returns 2d representation (lineIndex and charIndex) of cursor (or selection start). + * Overrides the superclass function to take into account text wrapping. + * + * @param {Number} [selectionStart] Optional index. When not given, current selectionStart is used. + */ + get2DCursorLocation: function(selectionStart) { + if (typeof selectionStart === 'undefined') { + selectionStart = this.selectionStart; + } + + var numLines = this._textLines.length, + removed = 0; + + for (var i = 0; i < numLines; i++) { + var line = this._textLines[i], + lineLen = line.length; + + if (selectionStart <= removed + lineLen) { + return { + lineIndex: i, + charIndex: selectionStart - removed + }; + } + + removed += lineLen; + + if (this.text[removed] === '\n' || this.text[removed] === ' ') { + removed++; + } + } + + return { + lineIndex: numLines - 1, + charIndex: this._textLines[numLines - 1].length + }; + }, + + /** + * Overrides superclass function and uses text wrapping data to get cursor + * boundary offsets instead of the array of chars. + * @param {Array} chars Unused + * @param {String} typeOfBoundaries Can be 'cursor' or 'selection' + * @returns {Object} Object with 'top', 'left', and 'lineLeft' properties set. + */ + _getCursorBoundariesOffsets: function(chars, typeOfBoundaries) { + var topOffset = 0, + leftOffset = 0, + cursorLocation = this.get2DCursorLocation(), + lineChars = this._textLines[cursorLocation.lineIndex].split(''), + lineLeftOffset = this._getLineLeftOffset(this._getLineWidth(this.ctx, cursorLocation.lineIndex)); + + for (var i = 0; i < cursorLocation.charIndex; i++) { + leftOffset += this._getWidthOfChar(this.ctx, lineChars[i], cursorLocation.lineIndex, i); + } + + for (i = 0; i < cursorLocation.lineIndex; i++) { + topOffset += this._getHeightOfLine(this.ctx, i); + } + + if (typeOfBoundaries === 'cursor') { + topOffset += (1 - this._fontSizeFraction) * this._getHeightOfLine(this.ctx, cursorLocation.lineIndex) + / this.lineHeight - this.getCurrentCharFontSize(cursorLocation.lineIndex, cursorLocation.charIndex) + * (1 - this._fontSizeFraction); + } + + return { + top: topOffset, + left: leftOffset, + lineLeft: lineLeftOffset + }; + }, + + getMinWidth: function() { + return Math.max(this.minWidth, this.dynamicMinWidth); + }, + + /** + * Returns object representation of an instance + * @method toObject + * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output + * @return {Object} object representation of an instance + */ + toObject: function(propertiesToInclude) { + return this.callSuper('toObject', ['minWidth'].concat(propertiesToInclude)); + } + }); + /** + * Returns fabric.Textbox instance from an object representation + * @static + * @memberOf fabric.Textbox + * @param {Object} object Object to create an instance from + * @param {Function} [callback] Callback to invoke when an fabric.Textbox instance is created + * @return {fabric.Textbox} instance of fabric.Textbox + */ + fabric.Textbox.fromObject = function(object, callback) { + var textbox = new fabric.Textbox(object.text, clone(object)); + callback && callback(textbox); + return textbox; + }; + /** + * Returns the default controls visibility required for Textboxes. + * @returns {Object} + */ + fabric.Textbox.getTextboxControlVisibility = function() { + return { + tl: false, + tr: false, + br: false, + bl: false, + ml: true, + mt: false, + mr: true, + mb: false, + mtr: true + }; + }; + +})(typeof exports !== 'undefined' ? exports : this); + + +(function() { + + /** + * Override _setObjectScale and add Textbox specific resizing behavior. Resizing + * a Textbox doesn't scale text, it only changes width and makes text wrap automatically. + */ + var setObjectScaleOverridden = fabric.Canvas.prototype._setObjectScale; + + fabric.Canvas.prototype._setObjectScale = function(localMouse, transform, + lockScalingX, lockScalingY, by, lockScalingFlip, _dim) { + + var t = transform.target; + if (t instanceof fabric.Textbox) { + var w = t.width * ((localMouse.x / transform.scaleX) / (t.width + t.strokeWidth)); + if (w >= t.getMinWidth()) { + t.set('width', w); + return true; + } + } + else { + return setObjectScaleOverridden.call(fabric.Canvas.prototype, localMouse, transform, + lockScalingX, lockScalingY, by, lockScalingFlip, _dim); + } + }; + + /** + * Sets controls of this group to the Textbox's special configuration if + * one is present in the group. Deletes _controlsVisibility otherwise, so that + * it gets initialized to default value at runtime. + */ + fabric.Group.prototype._refreshControlsVisibility = function() { + if (typeof fabric.Textbox === 'undefined') { + return; + } + for (var i = this._objects.length; i--;) { + if (this._objects[i] instanceof fabric.Textbox) { + this.setControlsVisibility(fabric.Textbox.getTextboxControlVisibility()); + return; + } + } + }; + + var clone = fabric.util.object.clone; + + fabric.util.object.extend(fabric.Textbox.prototype, /** @lends fabric.IText.prototype */ { + /** + * @private + */ + _removeExtraneousStyles: function() { + for (var prop in this._styleMap) { + if (!this._textLines[prop]) { + delete this.styles[this._styleMap[prop].line]; + } + } + }, + + /** + * Inserts style object for a given line/char index + * @param {Number} lineIndex Index of a line + * @param {Number} charIndex Index of a char + * @param {Object} [style] Style object to insert, if given + */ + insertCharStyleObject: function(lineIndex, charIndex, style) { + // adjust lineIndex and charIndex + var map = this._styleMap[lineIndex]; + lineIndex = map.line; + charIndex = map.offset + charIndex; + + fabric.IText.prototype.insertCharStyleObject.apply(this, [lineIndex, charIndex, style]); + }, + + /** + * Inserts new style object + * @param {Number} lineIndex Index of a line + * @param {Number} charIndex Index of a char + * @param {Boolean} isEndOfLine True if it's end of line + */ + insertNewlineStyleObject: function(lineIndex, charIndex, isEndOfLine) { + // adjust lineIndex and charIndex + var map = this._styleMap[lineIndex]; + lineIndex = map.line; + charIndex = map.offset + charIndex; + + fabric.IText.prototype.insertNewlineStyleObject.apply(this, [lineIndex, charIndex, isEndOfLine]); + }, + + /** + * Shifts line styles up or down. This function is slightly different than the one in + * itext_behaviour as it takes into account the styleMap. + * + * @param {Number} lineIndex Index of a line + * @param {Number} offset Can be -1 or +1 + */ + shiftLineStyles: function(lineIndex, offset) { + // shift all line styles by 1 upward + var clonedStyles = clone(this.styles), + map = this._styleMap[lineIndex]; + + // adjust line index + lineIndex = map.line; + + for (var line in this.styles) { + var numericLine = parseInt(line, 10); + + if (numericLine > lineIndex) { + this.styles[numericLine + offset] = clonedStyles[numericLine]; + + if (!clonedStyles[numericLine - offset]) { + delete this.styles[numericLine]; + } + } + } + //TODO: evaluate if delete old style lines with offset -1 + }, + + /** + * Figure out programatically the text on previous actual line (actual = separated by \n); + * + * @param {Number} lIndex + * @returns {String} + * @private + */ + _getTextOnPreviousLine: function(lIndex) { + var textOnPreviousLine = this._textLines[lIndex - 1]; + + while (this._styleMap[lIndex - 2] && this._styleMap[lIndex - 2].line === this._styleMap[lIndex - 1].line) { + textOnPreviousLine = this._textLines[lIndex - 2] + textOnPreviousLine; + + lIndex--; + } + + return textOnPreviousLine; + }, + + /** + * Removes style object + * @param {Boolean} isBeginningOfLine True if cursor is at the beginning of line + * @param {Number} [index] Optional index. When not given, current selectionStart is used. + */ + removeStyleObject: function(isBeginningOfLine, index) { + + var cursorLocation = this.get2DCursorLocation(index), + map = this._styleMap[cursorLocation.lineIndex], + lineIndex = map.line, + charIndex = map.offset + cursorLocation.charIndex; + this._removeStyleObject(isBeginningOfLine, cursorLocation, lineIndex, charIndex); + } + }); +})(); + + +(function() { + var override = fabric.IText.prototype._getNewSelectionStartFromOffset; + /** + * Overrides the IText implementation and adjusts character index as there is not always a linebreak + * + * @param {Number} mouseOffset + * @param {Number} prevWidth + * @param {Number} width + * @param {Number} index + * @param {Number} jlen + * @returns {Number} + */ + fabric.IText.prototype._getNewSelectionStartFromOffset = function(mouseOffset, prevWidth, width, index, jlen) { + index = override.call(this, mouseOffset, prevWidth, width, index, jlen); + + // the index passed into the function is padded by the amount of lines from _textLines (to account for \n) + // we need to remove this padding, and pad it by actual lines, and / or spaces that are meant to be there + var tmp = 0, + removed = 0; + + // account for removed characters + for (var i = 0; i < this._textLines.length; i++) { + tmp += this._textLines[i].length; + + if (tmp + removed >= index) { + break; + } + + if (this.text[tmp + removed] === '\n' || this.text[tmp + removed] === ' ') { + removed++; + } + } + + return index - i + removed; + }; +})(); + + +(function() { + + if (typeof document !== 'undefined' && typeof window !== 'undefined') { + return; + } + + var DOMParser = require('xmldom').DOMParser, + URL = require('url'), + HTTP = require('http'), + HTTPS = require('https'), + + Canvas = require('canvas'), + Image = require('canvas').Image; + + /** @private */ + function request(url, encoding, callback) { + var oURL = URL.parse(url); + + // detect if http or https is used + if ( !oURL.port ) { + oURL.port = ( oURL.protocol.indexOf('https:') === 0 ) ? 443 : 80; + } + + // assign request handler based on protocol + var reqHandler = (oURL.protocol.indexOf('https:') === 0 ) ? HTTPS : HTTP, + req = reqHandler.request({ + hostname: oURL.hostname, + port: oURL.port, + path: oURL.path, + method: 'GET' + }, function(response) { + var body = ''; + if (encoding) { + response.setEncoding(encoding); + } + response.on('end', function () { + callback(body); + }); + response.on('data', function (chunk) { + if (response.statusCode === 200) { + body += chunk; + } + }); + }); + + req.on('error', function(err) { + if (err.errno === process.ECONNREFUSED) { + fabric.log('ECONNREFUSED: connection refused to ' + oURL.hostname + ':' + oURL.port); + } + else { + fabric.log(err.message); + } + callback(null); + }); + + req.end(); + } + + /** @private */ + function requestFs(path, callback) { + var fs = require('fs'); + fs.readFile(path, function (err, data) { + if (err) { + fabric.log(err); + throw err; + } + else { + callback(data); + } + }); + } + + fabric.util.loadImage = function(url, callback, context) { + function createImageAndCallBack(data) { + if (data) { + img.src = new Buffer(data, 'binary'); + // preserving original url, which seems to be lost in node-canvas + img._src = url; + callback && callback.call(context, img); + } + else { + img = null; + callback && callback.call(context, null, true); + } + } + var img = new Image(); + if (url && (url instanceof Buffer || url.indexOf('data') === 0)) { + img.src = img._src = url; + callback && callback.call(context, img); + } + else if (url && url.indexOf('http') !== 0) { + requestFs(url, createImageAndCallBack); + } + else if (url) { + request(url, 'binary', createImageAndCallBack); + } + else { + callback && callback.call(context, url); + } + }; + + fabric.loadSVGFromURL = function(url, callback, reviver) { + url = url.replace(/^\n\s*/, '').replace(/\?.*$/, '').trim(); + if (url.indexOf('http') !== 0) { + requestFs(url, function(body) { + fabric.loadSVGFromString(body.toString(), callback, reviver); + }); + } + else { + request(url, '', function(body) { + fabric.loadSVGFromString(body, callback, reviver); + }); + } + }; + + fabric.loadSVGFromString = function(string, callback, reviver) { + var doc = new DOMParser().parseFromString(string); + fabric.parseSVGDocument(doc.documentElement, function(results, options) { + callback && callback(results, options); + }, reviver); + }; + + fabric.util.getScript = function(url, callback) { + request(url, '', function(body) { + // eslint-disable-next-line no-eval + eval(body); + callback && callback(); + }); + }; + + // fabric.util.createCanvasElement = function(_, width, height) { + // return new Canvas(width, height); + // } + + /** + * Only available when running fabric on node.js + * @param {Number} width Canvas width + * @param {Number} height Canvas height + * @param {Object} [options] Options to pass to FabricCanvas. + * @param {Object} [nodeCanvasOptions] Options to pass to NodeCanvas. + * @return {Object} wrapped canvas instance + */ + fabric.createCanvasForNode = function(width, height, options, nodeCanvasOptions) { + nodeCanvasOptions = nodeCanvasOptions || options; + + var canvasEl = fabric.document.createElement('canvas'), + nodeCanvas = new Canvas(width || 600, height || 600, nodeCanvasOptions), + nodeCacheCanvas = new Canvas(width || 600, height || 600, nodeCanvasOptions); + + // jsdom doesn't create style on canvas element, so here be temp. workaround + canvasEl.style = { }; + + canvasEl.width = nodeCanvas.width; + canvasEl.height = nodeCanvas.height; + options = options || { }; + options.nodeCanvas = nodeCanvas; + options.nodeCacheCanvas = nodeCacheCanvas; + var FabricCanvas = fabric.Canvas || fabric.StaticCanvas, + fabricCanvas = new FabricCanvas(canvasEl, options); + fabricCanvas.nodeCanvas = nodeCanvas; + fabricCanvas.nodeCacheCanvas = nodeCacheCanvas; + fabricCanvas.contextContainer = nodeCanvas.getContext('2d'); + fabricCanvas.contextCache = nodeCacheCanvas.getContext('2d'); + fabricCanvas.Font = Canvas.Font; + return fabricCanvas; + }; + + var originaInitStatic = fabric.StaticCanvas.prototype._initStatic; + fabric.StaticCanvas.prototype._initStatic = function(el, options) { + el = el || fabric.document.createElement('canvas'); + this.nodeCanvas = new Canvas(el.width, el.height); + this.nodeCacheCanvas = new Canvas(el.width, el.height); + originaInitStatic.call(this, el, options); + this.contextContainer = this.nodeCanvas.getContext('2d'); + this.contextCache = this.nodeCacheCanvas.getContext('2d'); + this.Font = Canvas.Font; + } + + /** @ignore */ + fabric.StaticCanvas.prototype.createPNGStream = function() { + return this.nodeCanvas.createPNGStream(); + }; + + fabric.StaticCanvas.prototype.createJPEGStream = function(opts) { + return this.nodeCanvas.createJPEGStream(opts); + }; + + fabric.StaticCanvas.prototype._initRetinaScaling = function() { + if (!this._isRetinaScaling()) { + return; + } + + this.lowerCanvasEl.setAttribute('width', this.width * fabric.devicePixelRatio); + this.lowerCanvasEl.setAttribute('height', this.height * fabric.devicePixelRatio); + this.nodeCanvas.width = this.width * fabric.devicePixelRatio; + this.nodeCanvas.height = this.height * fabric.devicePixelRatio; + this.contextContainer.scale(fabric.devicePixelRatio, fabric.devicePixelRatio); + return this; + }; + if (fabric.Canvas) { + fabric.Canvas.prototype._initRetinaScaling = fabric.StaticCanvas.prototype._initRetinaScaling; + } + + var origSetBackstoreDimension = fabric.StaticCanvas.prototype._setBackstoreDimension; + fabric.StaticCanvas.prototype._setBackstoreDimension = function(prop, value) { + origSetBackstoreDimension.call(this, prop, value); + this.nodeCanvas[prop] = value; + return this; + }; + if (fabric.Canvas) { + fabric.Canvas.prototype._setBackstoreDimension = fabric.StaticCanvas.prototype._setBackstoreDimension; + } + +})(); + diff --git a/www/examples/canvas/main.js b/www/examples/canvas/main.js index 114424c18..55c7f4c68 100644 --- a/www/examples/canvas/main.js +++ b/www/examples/canvas/main.js @@ -10,7 +10,7 @@ define([ 'json.sortify', '/bower_components/chainpad-json-validator/json-ot.js', '/common/cryptpad-common.js', - '/bower_components/fabric.js/dist/fabric.min.js', + 'fabric.js', '/bower_components/jquery/dist/jquery.min.js', '/bower_components/file-saver/FileSaver.min.js', //'/customize/pad.js' @@ -76,34 +76,47 @@ define([ var config = module.config = { initialState: '{}', - // TODO initialState ? - websocketURL: Config.websocketURL, - //userName: Crypto.rand64(8), + websocketURL: Cryptpad.getWebsocketURL(), + validateKey: secret.keys.validateKey, + readOnly: false, // TODO channel: secret.channel, - //cryptKey: key, - crypto: Crypto.createEncryptor(secret.key), + crypto: Crypto.createEncryptor(secret.keys), transformFunction: JsonOT.validate, }; + var editHash; var onInit = config.onInit = function (info) { - window.location.hash = info.channel + secret.key; - $(window).on('hashchange', function() { - window.location.reload(); - }); + editHash = Cryptpad.getEditHashFromKeys(info.channel, secret.keys); + + Cryptpad.replaceHash(editHash); + + //window.location.hash = info.channel + secret.key; + //$(window).on('hashchange', function() { window.location.reload(); }); + }; + + var Catch = function (f) { + return function () { + try { + f(); + } catch (e) { + console.error(e); + } + }; }; - var onRemote = config.onRemote = function () { + var onRemote = config.onRemote = Catch(function () { if (initializing) { return; } var userDoc = module.realtime.getUserDoc(); + canvas.loadFromJSON(userDoc); canvas.renderAll(); - }; + }); - var onLocal = config.onLocal = function () { + var onLocal = config.onLocal = Catch(function () { if (initializing) { return; } var content = JSONSortify(canvas.toDatalessJSON()); module.patchText(content); - }; + }); var onReady = config.onReady = function (info) { var realtime = module.realtime = info.realtime;