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cryptpad/www/whiteboard/fabric.js

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Make Canvas Work Again
8 years ago
/* 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("<!DOCTYPE html><html><head></head><body></body></html>");
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 <a href="http://stackoverflow.com/questions/4576724/dotted-stroke-in-canvas">dotted stroke in canvas</a>
*
* @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 <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/Trim">String#trim on MDN</a>
*/
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, '&amp;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&apos;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;');
}
/**
* 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 <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/bind">Function#bind on MDN</a>
* @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 <a href="http://gizma.com/easing/">Easing Equations by Robert Penner</a>
* @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 <g> 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<pattern x="0" y="0" id="', property, 'Pattern" ',
'width="', canvas[property].source.width,
'" height="', canvas[property].source.height,
'" patternUnits="userSpaceOnUse">\n',
'\t\t<image x="0" y="0" ',
'width="', canvas[property].source.width,
'" height="', canvas[property].source.height,
'" xlink:href="', canvas[property].source.src,
'"></image>\n\t</pattern>\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(/<!DOCTYPE[\s\S]*?(\[[\s\S]*\])*?>/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(/<!DOCTYPE[\s\S]*?(\[[\s\S]*\])*?>/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<style type="text/css">',
'<![CDATA[\n',
markup,
']]>',
'</style>\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 <a href="https://rawgithub.com/mjijackson/mjijackson.github.com/master/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript.html">https://github.com/mjijackson</a>
* @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 <a href="https://rawgithub.com/mjijackson/mjijackson.github.com/master/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript.html">https://github.com/mjijackson</a>
* @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 = [
'<linearGradient ',
commonAttributes,
' x1="', coords.x1,
'" y1="', coords.y1,
'" x2="', coords.x2,
'" y2="', coords.y2,
'">\n'
];
}
else if (this.type === 'radial') {
markup = [
'<radialGradient ',
commonAttributes,
' cx="', coords.x2,
'" cy="', coords.y2,
'" r="', coords.r2,
'" fx="', coords.x1,
'" fy="', coords.y1,
'">\n'
];
}
for (var i = 0; i < this.colorStops.length; i++) {
markup.push(
'<stop ',
'offset="', (this.colorStops[i].offset * 100) + '%',
'" style="stop-color:', this.colorStops[i].color,
(this.colorStops[i].opacity !== null ? ';stop-opacity: ' + this.colorStops[i].opacity : ';'),
'"/>\n'
);
}
markup.push((this.type === 'linear' ? '</linearGradient>\n' : '</radialGradient>\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:
*
* <linearGradient id="linearGrad1">
* <stop offset="0%" stop-color="white"/>
* <stop offset="100%" stop-color="black"/>
* </linearGradient>
*
* OR
*
* <linearGradient id="linearGrad2">
* <stop offset="0" style="stop-color:rgb(255,255,255)"/>
* <stop offset="1" style="stop-color:rgb(0,0,0)"/>
* </linearGradient>
*
* OR
*
* <radialGradient id="radialGrad1">
* <stop offset="0%" stop-color="white" stop-opacity="1" />
* <stop offset="50%" stop-color="black" stop-opacity="0.5" />
* <stop offset="100%" stop-color="white" stop-opacity="1" />
* </radialGradient>
*
* OR
*
* <radialGradient id="radialGrad2">
* <stop offset="0" stop-color="rgb(255,255,255)" />
* <stop offset="0.5" stop-color="rgb(0,0,0)" />
* <stop offset="1" stop-color="rgb(255,255,255)" />
* </radialGradient>
*
*/
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);
}
// <img> element
else if (typeof this.source.src === 'string') {
source = this.source.src;
}
// <canvas> 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 '<pattern id="SVGID_' + this.id +
'" x="' + patternOffsetX +
'" y="' + patternOffsetY +
'" width="' + patternWidth +
'" height="' + patternHeight + '">\n' +
'<image x="0" y="0"' +
' width="' + patternSource.width +
'" height="' + patternSource.height +
'" xlink:href="' + patternImgSrc +
'"></image>\n' +
'</pattern>\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 (
'<filter id="SVGID_' + this.id + '" y="-' + fBoxY + '%" height="' + (100 + 2 * fBoxY) + '%" ' +
'x="-' + fBoxX + '%" width="' + (100 + 2 * fBoxX) + '%" ' + '>\n' +
'\t<feGaussianBlur in="SourceAlpha" stdDeviation="' +
toFixed(this.blur ? this.blur / 2 : 0, NUM_FRACTION_DIGITS) + '"></feGaussianBlur>\n' +
'\t<feOffset dx="' + toFixed(offset.x, NUM_FRACTION_DIGITS) +
'" dy="' + toFixed(offset.y, NUM_FRACTION_DIGITS) + '" result="oBlur" ></feOffset>\n' +
'\t<feFlood flood-color="' + this.color + '"/>\n' +
'\t<feComposite in2="oBlur" operator="in" />\n' +
'\t<feMerge>\n' +
'\t\t<feMergeNode></feMergeNode>\n' +
'\t\t<feMergeNode in="SourceGraphic"></feMergeNode>\n' +
'\t</feMerge>\n' +
'</filter>\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 &lt;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}.
* <b>Backwards incompatibility note:</b> 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}.
* <b>Backwards incompatibility note:</b> 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 &lt;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 <caption>Normal overlayImage with left/top = 0</caption>
* 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 <caption>overlayImage with different properties</caption>
* 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 <caption>Stretched overlayImage #1 - width/height correspond to canvas width/height</caption>
* 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 <caption>Stretched overlayImage #2 - width/height correspond to canvas width/height</caption>
* 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 <caption>overlayImage loaded from cross-origin</caption>
* 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 <caption>Normal backgroundImage with left/top = 0</caption>
* 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 <caption>backgroundImage with different properties</caption>
* 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 <caption>Stretched backgroundImage #1 - width/height correspond to canvas width/height</caption>
* 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 <caption>Stretched backgroundImage #2 - width/height correspond to canvas width/height</caption>
* 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 <caption>backgroundImage loaded from cross-origin</caption>
* 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 <caption>Normal overlayColor - color value</caption>
* canvas.setOverlayColor('rgba(255, 73, 64, 0.6)', canvas.renderAll.bind(canvas));
* @example <caption>fabric.Pattern used as overlayColor</caption>
* canvas.setOverlayColor({
* source: 'http://fabricjs.com/assets/escheresque_ste.png'
* }, canvas.renderAll.bind(canvas));
* @example <caption>fabric.Pattern used as overlayColor with repeat and offset</caption>
* 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 <caption>Normal backgroundColor - color value</caption>
* canvas.setBackgroundColor('rgba(255, 73, 64, 0.6)', canvas.renderAll.bind(canvas));
* @example <caption>fabric.Pattern used as backgroundColor</caption>
* canvas.setBackgroundColor({
* source: 'http://fabricjs.com/assets/escheresque_ste.png'
* }, canvas.renderAll.bind(canvas));
* @example <caption>fabric.Pattern used as backgroundColor with repeat and offset</caption>
* 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 &lt;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 <caption>Normal SVG output</caption>
* var svg = canvas.toSVG();
* @example <caption>SVG output without preamble (without &lt;?xml ../>)</caption>
* var svg = canvas.toSVG({suppressPreamble: true});
* @example <caption>SVG output with viewBox attribute</caption>
* var svg = canvas.toSVG({
* viewBox: {
* x: 100,
* y: 100,
* width: 200,
* height: 300
* }
* });
* @example <caption>SVG output with different encoding (default: UTF-8)</caption>
* var svg = canvas.toSVG({encoding: 'ISO-8859-1'});
* @example <caption>Modify SVG output with reviver function</caption>
* 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('</svg>');
return markup.join('');
},
/**
* @private
*/
_setSVGPreamble: function(markup, options) {
if (options.suppressPreamble) {
return;
}
markup.push(
'<?xml version="1.0" encoding="', (options.encoding || 'UTF-8'), '" standalone="no" ?>\n',
'<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" ',
'"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\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(
'<svg ',
'xmlns="http://www.w3.org/2000/svg" ',
'xmlns:xlink="http://www.w3.org/1999/xlink" ',
'version="1.1" ',
'width="', width, '" ',
'height="', height, '" ',
(this.backgroundColor && !this.backgroundColor.toLive
? 'style="background-color: ' + this.backgroundColor + '" '
: null),
viewBox,
'xml:space="preserve">\n',
'<desc>Created with Fabric.js ', fabric.version, '</desc>\n',
'<defs>',
fabric.createSVGFontFacesMarkup(this.getObjects()),
fabric.createSVGRefElementsMarkup(this),
'</defs>\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(
'<rect x="', this[property].offsetX, '" y="', this[property].offsetY, '" ',
'width="',
(this[property].repeat === 'repeat-y' || this[property].repeat === 'no-repeat'
? this[property].source.width
: this.width),
'" height="',
(this[property].repeat === 'repeat-x' || this[property].repeat === 'no-repeat'
? this[property].source.height
: this.height),
'" fill="url(#' + property + 'Pattern)"',
'></rect>\n'
);
}
else if (this[property] && property === 'overlayColor') {
markup.push(
'<rect x="0" y="0" ',
'width="', this.width,
'" height="', this.height,
'" fill="', this[property], '"',
'></rect>\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 '#<fabric.Canvas (' + this.complexity() + '): ' +
'{ objects: ' + this.getObjects().length + ' }>';
}
});
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 <caption>JSON without additional properties</caption>
* var json = canvas.toJSON();
* @example <caption>JSON with additional properties included</caption>
* var json = canvas.toJSON(['lockMovementX', 'lockMovementY', 'lockRotation', 'lockScalingX', 'lockScalingY', 'lockUniScaling']);
* @example <caption>JSON without default values</caption>
* 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.
* <b>Backwards incompatibility note:</b> 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 &lt;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.
* <b>Backwards incompatibility note:</b> 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.
* <b>Backwards incompatibility note:</b> 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 &lt;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 <caption>Generate jpeg dataURL with lower quality</caption>
* var dataURL = canvas.toDataURL({
* format: 'jpeg',
* quality: 0.8
* });
* @example <caption>Generate cropped png dataURL (clipping of canvas)</caption>
* var dataURL = canvas.toDataURL({
* format: 'png',
* left: 100,
* top: 100,
* width: 200,
* height: 200
* });
* @example <caption>Generate double scaled png dataURL</caption>
* 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 <caption>loadFromJSON</caption>
* canvas.loadFromJSON(json, canvas.renderAll.bind(canvas));
* @example <caption>loadFromJSON with reviver</caption>
* 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.
* <b>Backwards incompatibility note:</b> 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.
* <b>Backwards incompatibility note:</b> 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
* <b>Backwards incompatibility note:</b> 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 '#<fabric.' + capitalize(this.type) + '>';
},
/**
* 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
* <b>Backwards incompatibility note:</b> 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 <caption>Set linear gradient</caption>
* 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 <caption>Set radial gradient</caption>
* 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 <caption>Set pattern</caption>
* 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 <caption>Set shadow with string notation</caption>
* object.setShadow('2px 2px 10px rgba(0,0,0,0.2)');
* canvas.renderAll();
* @example <caption>Set shadow with object notation</caption>
* 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', &hellip;)`)
* @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(
'<line ', this.getSvgId(),
'x1="', p.x1,
'" y1="', p.y1,
'" x2="', p.x2,
'" y2="', p.y2,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
this.getSvgTransformMatrix(),
'"/>\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(
'<circle ', this.getSvgId(),
'cx="' + x + '" cy="' + y + '" ',
'r="', this.radius,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
' ', this.getSvgTransformMatrix(),
'"/>\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(
'<path d="M ' + startX + ' ' + startY,
' A ' + this.radius + ' ' + this.radius,
' 0 ', +largeFlag + ' 1', ' ' + endX + ' ' + endY,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
' ', this.getSvgTransformMatrix(),
'"/>\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(
'<polygon ', this.getSvgId(),
'points="', points,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
'"/>'
);
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(
'<ellipse ', this.getSvgId(),
'cx="', x, '" cy="', y, '" ',
'rx="', this.rx,
'" ry="', this.ry,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
this.getSvgTransformMatrix(),
'"/>\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(
'<rect ', this.getSvgId(),
'x="', x, '" y="', y,
'" rx="', this.get('rx'), '" ry="', this.get('ry'),
'" width="', this.width, '" height="', this.height,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
this.getSvgTransformMatrix(),
'"/>\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 '#<fabric.Path (' + this.complexity() +
'): { "top": ' + this.top + ', "left": ' + this.left + ' }>';
},
/**
* 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(
'<path ', this.getSvgId(),
'd="', path,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(), addTransform,
this.getSvgTransformMatrix(), '" stroke-linecap="round" ',
'/>\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 <path> 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(
'<g ', this.getSvgId(),
'style="', this.getSvgStyles(), '" ',
'transform="', this.getSvgTransformMatrix(), translatePart, this.getSvgTransform(), '" ',
'>\n'
);
for (var i = 0, len = objects.length; i < len; i++) {
markup.push('\t', objects[i].toSVG(reviver));
}
markup.push('</g>\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 '#<fabric.PathGroup (' + this.complexity() +
'): { top: ' + this.top + ', left: ' + this.left + ' }>';
},
/**
* 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 '#<fabric.Group: (' + this.complexity() + ')>';
},
/**
* 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(
'<g ', this.getSvgId(), 'transform="',
/* avoiding styles intentionally */
this.getSvgTransform(),
this.getSvgTransformMatrix(),
'" style="',
this.getSvgFilter(),
'">\n'
);
for (var i = 0, len = this._objects.length; i < len; i++) {
markup.push('\t', this._objects[i].toSVG(reviver));
}
markup.push('</g>\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(
'<g transform="', this.getSvgTransform(), this.getSvgTransformMatrix(), '">\n',
'<image ', this.getSvgId(), 'xlink:href="', this.getSvgSrc(filtered),
'" x="', x, '" y="', y,
'" style="', this.getSvgStyles(),
// we're essentially moving origin of transformation from top/left corner to the center of the shape
// by wrapping it in container <g> element with actual transformation, then offsetting object to the top/left
// so that object's center aligns with container's left/top
'" width="', this.width,
'" height="', this.height,
'" preserveAspectRatio="', preserveAspectRatio, '"',
'></image>\n'
);
if (this.stroke || this.strokeDashArray) {
var origFill = this.fill;
this.fill = null;
markup.push(
'<rect ',
'x="', x, '" y="', y,
'" width="', this.width, '" height="', this.height,
'" style="', this.getSvgStyles(),
'"/>\n'
);
this.fill = origFill;
}
markup.push('</g>\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 '#<fabric.Image: { src: "' + this.getSrc() + '" }>';
},
/**
* 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 <a href="http://www.html5rocks.com/en/tutorials/canvas/imagefilters/">html5rocks article</a>
* @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 <caption>Sharpen filter</caption>
* 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 <caption>Blur filter</caption>
* 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 <caption>Emboss filter</caption>
* 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 <caption>Emboss filter with opaqueness</caption>
* 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 <a href="https://github.com/mezzoblue/PaintbrushJS">https://github.com/mezzoblue/PaintbrushJS</a>
* @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 <caption>Tint filter with hex color and opacity</caption>
* var filter = new fabric.Image.filters.Tint({
* color: '#3513B0',
* opacity: 0.5
* });
* object.filters.push(filter);
* object.applyFilters(canvas.renderAll.bind(canvas));
* @example <caption>Tint filter with rgba color</caption>
* 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 <a href="http://www.laurenscorijn.com/articles/colormath-basics">http://www.laurenscorijn.com/articles/colormath-basics</a>
* @class fabric.Image.filters.Multiply
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @example <caption>Multiply filter with hex color</caption>
* var filter = new fabric.Image.filters.Multiply({
* color: '#F0F'
* });
* object.filters.push(filter);
* object.applyFilters(canvas.renderAll.bind(canvas));
* @example <caption>Multiply filter with rgb color</caption>
* 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 <caption>Kodachrome filter</caption>
* 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.
* <b>Backwards incompatibility note:</b> This property was named "strokeStyle" until v1.1.6
* @type String
* @default
*/
stroke: null,
/**
* Shadow object representing shadow of this shape.
* <b>Backwards incompatibility note:</b> 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 '#<fabric.Text (' + this.complexity() +
'): { "text": "' + this.text + '", "fontFamily": "' + this.fontFamily + '" }>';
},
/**
* @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<g ', this.getSvgId(), 'transform="', this.getSvgTransform(), this.getSvgTransformMatrix(), '"',
style, '>\n',
textAndBg.textBgRects.join(''),
'\t\t<text ',
(this.fontFamily ? 'font-family="' + this.fontFamily.replace(/"/g, '\'') + '" ' : ''),
(this.fontSize ? 'font-size="' + this.fontSize + '" ' : ''),
(this.fontStyle ? 'font-style="' + this.fontStyle + '" ' : ''),
(this.fontWeight ? 'font-weight="' + this.fontWeight + '" ' : ''),
(this.textDecoration ? 'text-decoration="' + this.textDecoration + '" ' : ''),
'style="', this.getSvgStyles(noShadow), '" >\n',
textAndBg.textSpans.join(''),
'\t\t</text>\n',
'\t</g>\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<tspan x="',
toFixed(textLeftOffset + this._getLineLeftOffset(this._getLineWidth(this.ctx, i)), NUM_FRACTION_DIGITS), '" ',
'y="',
toFixed(yPos, NUM_FRACTION_DIGITS),
'" ',
// doing this on <tspan> elements since setting opacity
// on containing <text> one doesn't work in Illustrator
this._getFillAttributes(this.fill), '>',
fabric.util.string.escapeXml(this._textLines[i]),
'</tspan>\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<tspan x="',
toFixed(textLeftOffset, NUM_FRACTION_DIGITS), '" ',
'y="',
toFixed(yPos, NUM_FRACTION_DIGITS),
'" ',
// doing this on <tspan> elements since setting opacity
// on containing <text> one doesn't work in Illustrator
attributes, '>',
fabric.util.string.escapeXml(word),
'</tspan>\n'
);
textLeftOffset += this._getWidthOfWords(ctx, word) + spaceWidth;
}
},
_setSVGTextLineBg: function(textBgRects, i, textLeftOffset, textTopOffset, height) {
textBgRects.push(
'\t\t<rect ',
this._getFillAttributes(this.textBackgroundColor),
' x="',
toFixed(textLeftOffset + this._getLineLeftOffset(this._getLineWidth(this.ctx, i)), NUM_FRACTION_DIGITS),
'" y="',
toFixed(height - this.height / 2, NUM_FRACTION_DIGITS),
'" width="',
toFixed(this._getLineWidth(this.ctx, i), NUM_FRACTION_DIGITS),
'" height="',
toFixed(this._getHeightOfLine(this.ctx, i) / this.lineHeight, NUM_FRACTION_DIGITS),
'"></rect>\n');
},
_setSVGBg: function(textBgRects) {
if (this.backgroundColor) {
textBgRects.push(
'\t\t<rect ',
this._getFillAttributes(this.backgroundColor),
' x="',
toFixed(-this.width / 2, NUM_FRACTION_DIGITS),
'" y="',
toFixed(-this.height / 2, NUM_FRACTION_DIGITS),
'" width="',
toFixed(this.width, NUM_FRACTION_DIGITS),
'" height="',
toFixed(this.height, NUM_FRACTION_DIGITS),
'"></rect>\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 (<b>not yet implemented</b>)
* @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 <b>v1.4</b>) 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
*
* <p>Supported key combinations:</p>
* <pre>
* 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
* </pre>
*
* <p>Supported mouse/touch combination</p>
* <pre>
* Position cursor: click/touch
* Create selection: click/touch & drag
* Create selection: click & shift + click
* Select word: double click
* Select line: triple click
* </pre>
*/
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<rect fill="', styleDecl.textBackgroundColor,
'" x="', toFixed(lineLeftOffset + charOffset, NUM_FRACTION_DIGITS),
'" y="', toFixed(lineTopOffset - this.height / 2, NUM_FRACTION_DIGITS),
'" width="', toFixed(charWidth, NUM_FRACTION_DIGITS),
'" height="', toFixed(heightOfLine / this.lineHeight, NUM_FRACTION_DIGITS),
'"></rect>\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<tspan x="', toFixed(lineLeftOffset + charOffset, NUM_FRACTION_DIGITS), '" y="',
toFixed(lineTopOffset - this.height / 2, NUM_FRACTION_DIGITS), '" ',
(styleDecl.fontFamily ? 'font-family="' + styleDecl.fontFamily.replace(/"/g, '\'') + '" ' : ''),
(styleDecl.fontSize ? 'font-size="' + styleDecl.fontSize + '" ' : ''),
(styleDecl.fontStyle ? 'font-style="' + styleDecl.fontStyle + '" ' : ''),
(styleDecl.fontWeight ? 'font-weight="' + styleDecl.fontWeight + '" ' : ''),
(styleDecl.textDecoration ? 'text-decoration="' + styleDecl.textDecoration + '" ' : ''),
'style="', fillStyles, '">',
fabric.util.string.escapeXml(_char),
'</tspan>\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;
}
})();