+ /* Copyright 2012 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/* globals requirejs, __pdfjsdev_webpack__ */
+
+import {
+ createPromiseCapability, deprecated, error, getVerbosityLevel, globalScope,
+ info, InvalidPDFException, isArray, isArrayBuffer, isInt, isSameOrigin,
+ loadJpegStream, MessageHandler, MissingPDFException, NativeImageDecoding,
+ PageViewport, PasswordException, StatTimer, stringToBytes,
+ UnexpectedResponseException, UnknownErrorException, Util, warn
+} from '../shared/util';
+import {
+ DOMCanvasFactory, DOMCMapReaderFactory, getDefaultSetting,
+ RenderingCancelledException
+} from './dom_utils';
+import { FontFaceObject, FontLoader } from './font_loader';
+import { CanvasGraphics } from './canvas';
+import { Metadata } from './metadata';
+
+var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536
+
+var isWorkerDisabled = false;
+var workerSrc;
+var isPostMessageTransfersDisabled = false;
+
+var pdfjsFilePath =
+ typeof PDFJSDev !== 'undefined' &&
+ PDFJSDev.test('PRODUCTION && !(MOZCENTRAL || FIREFOX)') &&
+ typeof document !== 'undefined' && document.currentScript ?
+ document.currentScript.src : null;
+
+var fakeWorkerFilesLoader = null;
+var useRequireEnsure = false;
+// The if below protected by __pdfjsdev_webpack__ check from webpack parsing.
+if (typeof PDFJSDev !== 'undefined' &&
+ PDFJSDev.test('GENERIC && !SINGLE_FILE') &&
+ typeof __pdfjsdev_webpack__ === 'undefined') {
+ // For GENERIC build we need add support of different fake file loaders
+ // for different frameworks.
+ if (typeof window === 'undefined') {
+ // node.js - disable worker and set require.ensure.
+ isWorkerDisabled = true;
+ if (typeof require.ensure === 'undefined') {
+ require.ensure = require('node-ensure');
+ }
+ useRequireEnsure = true;
+ } else if (typeof require !== 'undefined' &&
+ typeof require.ensure === 'function') {
+ useRequireEnsure = true;
+ }
+ if (typeof requirejs !== 'undefined' && requirejs.toUrl) {
+ workerSrc = requirejs.toUrl('pdfjs-dist/build/pdf.worker.js');
+ }
+ var dynamicLoaderSupported =
+ typeof requirejs !== 'undefined' && requirejs.load;
+ fakeWorkerFilesLoader = useRequireEnsure ? (function (callback) {
+ require.ensure([], function () {
+ var worker;
+ if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('LIB')) {
+ worker = require('../pdf.worker.js');
+ } else {
+ worker = require('./pdf.worker.js');
+ }
+ callback(worker.WorkerMessageHandler);
+ });
+ }) : dynamicLoaderSupported ? (function (callback) {
+ requirejs(['pdfjs-dist/build/pdf.worker'], function (worker) {
+ callback(worker.WorkerMessageHandler);
+ });
+ }) : null;
+}
+
+/**
+ * Document initialization / loading parameters object.
+ *
+ * @typedef {Object} DocumentInitParameters
+ * @property {string} url - The URL of the PDF.
+ * @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
+ * (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
+ * use atob() to convert it to a binary string first.
+ * @property {Object} httpHeaders - Basic authentication headers.
+ * @property {boolean} withCredentials - Indicates whether or not cross-site
+ * Access-Control requests should be made using credentials such as cookies
+ * or authorization headers. The default is false.
+ * @property {string} password - For decrypting password-protected PDFs.
+ * @property {TypedArray} initialData - A typed array with the first portion or
+ * all of the pdf data. Used by the extension since some data is already
+ * loaded before the switch to range requests.
+ * @property {number} length - The PDF file length. It's used for progress
+ * reports and range requests operations.
+ * @property {PDFDataRangeTransport} range
+ * @property {number} rangeChunkSize - Optional parameter to specify
+ * maximum number of bytes fetched per range request. The default value is
+ * 2^16 = 65536.
+ * @property {PDFWorker} worker - The worker that will be used for the loading
+ * and parsing of the PDF data.
+ * @property {string} docBaseUrl - (optional) The base URL of the document,
+ * used when attempting to recover valid absolute URLs for annotations, and
+ * outline items, that (incorrectly) only specify relative URLs.
+ * @property {boolean} disableNativeImageDecoder - (deprecated) Disable decoding
+ * of certain (simple) JPEG images in the browser. This is useful for
+ * environments without DOM image support, such as e.g. Node.js.
+ * The default value is `false`.
+ * @property {string} nativeImageDecoderSupport - (optional) Strategy for
+ * decoding certain (simple) JPEG images in the browser. This is useful for
+ * environments without DOM image and canvas support, such as e.g. Node.js.
+ * Valid values are 'decode', 'display' or 'none'; where 'decode' is intended
+ * for browsers with full image/canvas support, 'display' for environments
+ * with limited image support through stubs (useful for SVG conversion),
+ * and 'none' where JPEG images will be decoded entirely by PDF.js.
+ * The default value is 'decode'.
+ * @property {Object} CMapReaderFactory - (optional) The factory that will be
+ * used when reading built-in CMap files. Providing a custom factory is useful
+ * for environments without `XMLHttpRequest` support, such as e.g. Node.js.
+ * The default value is {DOMCMapReaderFactory}.
+ * @property {boolean} stopAtErrors - (optional) Reject certain promises, e.g.
+ * `getOperatorList`, `getTextContent`, and `RenderTask`, when the associated
+ * PDF data cannot be successfully parsed, instead of attempting to recover
+ * whatever possible of the data. The default value is `false`.
+ */
+
+/**
+ * @typedef {Object} PDFDocumentStats
+ * @property {Array} streamTypes - Used stream types in the document (an item
+ * is set to true if specific stream ID was used in the document).
+ * @property {Array} fontTypes - Used font type in the document (an item is set
+ * to true if specific font ID was used in the document).
+ */
+
+/**
+ * This is the main entry point for loading a PDF and interacting with it.
+ * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
+ * is used, which means it must follow the same origin rules that any XHR does
+ * e.g. No cross domain requests without CORS.
+ *
+ * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src
+ * Can be a url to where a PDF is located, a typed array (Uint8Array)
+ * already populated with data or parameter object.
+ *
+ * @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used
+ * if you want to manually serve range requests for data in the PDF.
+ *
+ * @param {function} passwordCallback (deprecated) It is used to request a
+ * password if wrong or no password was provided. The callback receives two
+ * parameters: function that needs to be called with new password and reason
+ * (see {PasswordResponses}).
+ *
+ * @param {function} progressCallback (deprecated) It is used to be able to
+ * monitor the loading progress of the PDF file (necessary to implement e.g.
+ * a loading bar). The callback receives an {Object} with the properties:
+ * {number} loaded and {number} total.
+ *
+ * @return {PDFDocumentLoadingTask}
+ */
+function getDocument(src, pdfDataRangeTransport,
+ passwordCallback, progressCallback) {
+ var task = new PDFDocumentLoadingTask();
+
+ // Support of the obsolete arguments (for compatibility with API v1.0)
+ if (arguments.length > 1) {
+ deprecated('getDocument is called with pdfDataRangeTransport, ' +
+ 'passwordCallback or progressCallback argument');
+ }
+ if (pdfDataRangeTransport) {
+ if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
+ // Not a PDFDataRangeTransport instance, trying to add missing properties.
+ pdfDataRangeTransport = Object.create(pdfDataRangeTransport);
+ pdfDataRangeTransport.length = src.length;
+ pdfDataRangeTransport.initialData = src.initialData;
+ if (!pdfDataRangeTransport.abort) {
+ pdfDataRangeTransport.abort = function () {};
+ }
+ }
+ src = Object.create(src);
+ src.range = pdfDataRangeTransport;
+ }
+ task.onPassword = passwordCallback || null;
+ task.onProgress = progressCallback || null;
+
+ var source;
+ if (typeof src === 'string') {
+ source = { url: src, };
+ } else if (isArrayBuffer(src)) {
+ source = { data: src, };
+ } else if (src instanceof PDFDataRangeTransport) {
+ source = { range: src, };
+ } else {
+ if (typeof src !== 'object') {
+ error('Invalid parameter in getDocument, need either Uint8Array, ' +
+ 'string or a parameter object');
+ }
+ if (!src.url && !src.data && !src.range) {
+ error('Invalid parameter object: need either .data, .range or .url');
+ }
+
+ source = src;
+ }
+
+ var params = {};
+ var rangeTransport = null;
+ var worker = null;
+ for (var key in source) {
+ if (key === 'url' && typeof window !== 'undefined') {
+ // The full path is required in the 'url' field.
+ params[key] = new URL(source[key], window.location).href;
+ continue;
+ } else if (key === 'range') {
+ rangeTransport = source[key];
+ continue;
+ } else if (key === 'worker') {
+ worker = source[key];
+ continue;
+ } else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
+ // Converting string or array-like data to Uint8Array.
+ var pdfBytes = source[key];
+ if (typeof pdfBytes === 'string') {
+ params[key] = stringToBytes(pdfBytes);
+ } else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
+ !isNaN(pdfBytes.length)) {
+ params[key] = new Uint8Array(pdfBytes);
+ } else if (isArrayBuffer(pdfBytes)) {
+ params[key] = new Uint8Array(pdfBytes);
+ } else {
+ error('Invalid PDF binary data: either typed array, string or ' +
+ 'array-like object is expected in the data property.');
+ }
+ continue;
+ }
+ params[key] = source[key];
+ }
+
+ params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;
+ params.ignoreErrors = params.stopAtErrors !== true;
+ var CMapReaderFactory = params.CMapReaderFactory || DOMCMapReaderFactory;
+
+ if (params.disableNativeImageDecoder !== undefined) {
+ deprecated('parameter disableNativeImageDecoder, ' +
+ 'use nativeImageDecoderSupport instead');
+ }
+ params.nativeImageDecoderSupport = params.nativeImageDecoderSupport ||
+ (params.disableNativeImageDecoder === true ? NativeImageDecoding.NONE :
+ NativeImageDecoding.DECODE);
+ if (params.nativeImageDecoderSupport !== NativeImageDecoding.DECODE &&
+ params.nativeImageDecoderSupport !== NativeImageDecoding.NONE &&
+ params.nativeImageDecoderSupport !== NativeImageDecoding.DISPLAY) {
+ warn('Invalid parameter nativeImageDecoderSupport: ' +
+ 'need a state of enum {NativeImageDecoding}');
+ params.nativeImageDecoderSupport = NativeImageDecoding.DECODE;
+ }
+
+ if (!worker) {
+ // Worker was not provided -- creating and owning our own. If message port
+ // is specified in global settings, using it.
+ var workerPort = getDefaultSetting('workerPort');
+ worker = workerPort ? PDFWorker.fromPort(workerPort) : new PDFWorker();
+ task._worker = worker;
+ }
+ var docId = task.docId;
+ worker.promise.then(function () {
+ if (task.destroyed) {
+ throw new Error('Loading aborted');
+ }
+ return _fetchDocument(worker, params, rangeTransport, docId).then(
+ function (workerId) {
+ if (task.destroyed) {
+ throw new Error('Loading aborted');
+ }
+ var messageHandler = new MessageHandler(docId, workerId, worker.port);
+ var transport = new WorkerTransport(messageHandler, task, rangeTransport,
+ CMapReaderFactory);
+ task._transport = transport;
+ messageHandler.send('Ready', null);
+ });
+ }).catch(task._capability.reject);
+
+ return task;
+}
+
+/**
+ * Starts fetching of specified PDF document/data.
+ * @param {PDFWorker} worker
+ * @param {Object} source
+ * @param {PDFDataRangeTransport} pdfDataRangeTransport
+ * @param {string} docId Unique document id, used as MessageHandler id.
+ * @returns {Promise} The promise, which is resolved when worker id of
+ * MessageHandler is known.
+ * @private
+ */
+function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
+ if (worker.destroyed) {
+ return Promise.reject(new Error('Worker was destroyed'));
+ }
+
+ source.disableAutoFetch = getDefaultSetting('disableAutoFetch');
+ source.disableStream = getDefaultSetting('disableStream');
+ source.chunkedViewerLoading = !!pdfDataRangeTransport;
+ if (pdfDataRangeTransport) {
+ source.length = pdfDataRangeTransport.length;
+ source.initialData = pdfDataRangeTransport.initialData;
+ }
+ return worker.messageHandler.sendWithPromise('GetDocRequest', {
+ docId,
+ source,
+ disableRange: getDefaultSetting('disableRange'),
+ maxImageSize: getDefaultSetting('maxImageSize'),
+ disableFontFace: getDefaultSetting('disableFontFace'),
+ disableCreateObjectURL: getDefaultSetting('disableCreateObjectURL'),
+ postMessageTransfers: getDefaultSetting('postMessageTransfers') &&
+ !isPostMessageTransfersDisabled,
+ docBaseUrl: source.docBaseUrl,
+ nativeImageDecoderSupport: source.nativeImageDecoderSupport,
+ ignoreErrors: source.ignoreErrors,
+ }).then(function (workerId) {
+ if (worker.destroyed) {
+ throw new Error('Worker was destroyed');
+ }
+ return workerId;
+ });
+}
+
+/**
+ * PDF document loading operation.
+ * @class
+ * @alias PDFDocumentLoadingTask
+ */
+var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {
+ var nextDocumentId = 0;
+
+ /** @constructs PDFDocumentLoadingTask */
+ function PDFDocumentLoadingTask() {
+ this._capability = createPromiseCapability();
+ this._transport = null;
+ this._worker = null;
+
+ /**
+ * Unique document loading task id -- used in MessageHandlers.
+ * @type {string}
+ */
+ this.docId = 'd' + (nextDocumentId++);
+
+ /**
+ * Shows if loading task is destroyed.
+ * @type {boolean}
+ */
+ this.destroyed = false;
+
+ /**
+ * Callback to request a password if wrong or no password was provided.
+ * The callback receives two parameters: function that needs to be called
+ * with new password and reason (see {PasswordResponses}).
+ */
+ this.onPassword = null;
+
+ /**
+ * Callback to be able to monitor the loading progress of the PDF file
+ * (necessary to implement e.g. a loading bar). The callback receives
+ * an {Object} with the properties: {number} loaded and {number} total.
+ */
+ this.onProgress = null;
+
+ /**
+ * Callback to when unsupported feature is used. The callback receives
+ * an {UNSUPPORTED_FEATURES} argument.
+ */
+ this.onUnsupportedFeature = null;
+ }
+
+ PDFDocumentLoadingTask.prototype =
+ /** @lends PDFDocumentLoadingTask.prototype */ {
+ /**
+ * @return {Promise}
+ */
+ get promise() {
+ return this._capability.promise;
+ },
+
+ /**
+ * Aborts all network requests and destroys worker.
+ * @return {Promise} A promise that is resolved after destruction activity
+ * is completed.
+ */
+ destroy() {
+ this.destroyed = true;
+
+ var transportDestroyed = !this._transport ? Promise.resolve() :
+ this._transport.destroy();
+ return transportDestroyed.then(() => {
+ this._transport = null;
+ if (this._worker) {
+ this._worker.destroy();
+ this._worker = null;
+ }
+ });
+ },
+
+ /**
+ * Registers callbacks to indicate the document loading completion.
+ *
+ * @param {function} onFulfilled The callback for the loading completion.
+ * @param {function} onRejected The callback for the loading failure.
+ * @return {Promise} A promise that is resolved after the onFulfilled or
+ * onRejected callback.
+ */
+ then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
+ return this.promise.then.apply(this.promise, arguments);
+ },
+ };
+
+ return PDFDocumentLoadingTask;
+})();
+
+/**
+ * Abstract class to support range requests file loading.
+ * @class
+ * @alias PDFDataRangeTransport
+ * @param {number} length
+ * @param {Uint8Array} initialData
+ */
+var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
+ function PDFDataRangeTransport(length, initialData) {
+ this.length = length;
+ this.initialData = initialData;
+
+ this._rangeListeners = [];
+ this._progressListeners = [];
+ this._progressiveReadListeners = [];
+ this._readyCapability = createPromiseCapability();
+ }
+ PDFDataRangeTransport.prototype =
+ /** @lends PDFDataRangeTransport.prototype */ {
+ addRangeListener:
+ function PDFDataRangeTransport_addRangeListener(listener) {
+ this._rangeListeners.push(listener);
+ },
+
+ addProgressListener:
+ function PDFDataRangeTransport_addProgressListener(listener) {
+ this._progressListeners.push(listener);
+ },
+
+ addProgressiveReadListener:
+ function PDFDataRangeTransport_addProgressiveReadListener(listener) {
+ this._progressiveReadListeners.push(listener);
+ },
+
+ onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
+ var listeners = this._rangeListeners;
+ for (var i = 0, n = listeners.length; i < n; ++i) {
+ listeners[i](begin, chunk);
+ }
+ },
+
+ onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
+ this._readyCapability.promise.then(() => {
+ var listeners = this._progressListeners;
+ for (var i = 0, n = listeners.length; i < n; ++i) {
+ listeners[i](loaded);
+ }
+ });
+ },
+
+ onDataProgressiveRead:
+ function PDFDataRangeTransport_onDataProgress(chunk) {
+ this._readyCapability.promise.then(() => {
+ var listeners = this._progressiveReadListeners;
+ for (var i = 0, n = listeners.length; i < n; ++i) {
+ listeners[i](chunk);
+ }
+ });
+ },
+
+ transportReady: function PDFDataRangeTransport_transportReady() {
+ this._readyCapability.resolve();
+ },
+
+ requestDataRange:
+ function PDFDataRangeTransport_requestDataRange(begin, end) {
+ throw new Error('Abstract method PDFDataRangeTransport.requestDataRange');
+ },
+
+ abort: function PDFDataRangeTransport_abort() {
+ },
+ };
+ return PDFDataRangeTransport;
+})();
+
+/**
+ * Proxy to a PDFDocument in the worker thread. Also, contains commonly used
+ * properties that can be read synchronously.
+ * @class
+ * @alias PDFDocumentProxy
+ */
+var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
+ function PDFDocumentProxy(pdfInfo, transport, loadingTask) {
+ this.pdfInfo = pdfInfo;
+ this.transport = transport;
+ this.loadingTask = loadingTask;
+ }
+ PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ {
+ /**
+ * @return {number} Total number of pages the PDF contains.
+ */
+ get numPages() {
+ return this.pdfInfo.numPages;
+ },
+ /**
+ * @return {string} A unique ID to identify a PDF. Not guaranteed to be
+ * unique.
+ */
+ get fingerprint() {
+ return this.pdfInfo.fingerprint;
+ },
+ /**
+ * @param {number} pageNumber The page number to get. The first page is 1.
+ * @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
+ * object.
+ */
+ getPage: function PDFDocumentProxy_getPage(pageNumber) {
+ return this.transport.getPage(pageNumber);
+ },
+ /**
+ * @param {{num: number, gen: number}} ref The page reference. Must have
+ * the 'num' and 'gen' properties.
+ * @return {Promise} A promise that is resolved with the page index that is
+ * associated with the reference.
+ */
+ getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
+ return this.transport.getPageIndex(ref);
+ },
+ /**
+ * @return {Promise} A promise that is resolved with a lookup table for
+ * mapping named destinations to reference numbers.
+ *
+ * This can be slow for large documents: use getDestination instead
+ */
+ getDestinations: function PDFDocumentProxy_getDestinations() {
+ return this.transport.getDestinations();
+ },
+ /**
+ * @param {string} id The named destination to get.
+ * @return {Promise} A promise that is resolved with all information
+ * of the given named destination.
+ */
+ getDestination: function PDFDocumentProxy_getDestination(id) {
+ return this.transport.getDestination(id);
+ },
+ /**
+ * @return {Promise} A promise that is resolved with:
+ * an Array containing the pageLabels that correspond to the pageIndexes,
+ * or `null` when no pageLabels are present in the PDF file.
+ */
+ getPageLabels: function PDFDocumentProxy_getPageLabels() {
+ return this.transport.getPageLabels();
+ },
+ /**
+ * @return {Promise} A promise that is resolved with a lookup table for
+ * mapping named attachments to their content.
+ */
+ getAttachments: function PDFDocumentProxy_getAttachments() {
+ return this.transport.getAttachments();
+ },
+ /**
+ * @return {Promise} A promise that is resolved with an array of all the
+ * JavaScript strings in the name tree.
+ */
+ getJavaScript: function PDFDocumentProxy_getJavaScript() {
+ return this.transport.getJavaScript();
+ },
+ /**
+ * @return {Promise} A promise that is resolved with an {Array} that is a
+ * tree outline (if it has one) of the PDF. The tree is in the format of:
+ * [
+ * {
+ * title: string,
+ * bold: boolean,
+ * italic: boolean,
+ * color: rgb Uint8Array,
+ * dest: dest obj,
+ * url: string,
+ * items: array of more items like this
+ * },
+ * ...
+ * ].
+ */
+ getOutline: function PDFDocumentProxy_getOutline() {
+ return this.transport.getOutline();
+ },
+ /**
+ * @return {Promise} A promise that is resolved with an {Object} that has
+ * info and metadata properties. Info is an {Object} filled with anything
+ * available in the information dictionary and similarly metadata is a
+ * {Metadata} object with information from the metadata section of the PDF.
+ */
+ getMetadata: function PDFDocumentProxy_getMetadata() {
+ return this.transport.getMetadata();
+ },
+ /**
+ * @return {Promise} A promise that is resolved with a TypedArray that has
+ * the raw data from the PDF.
+ */
+ getData: function PDFDocumentProxy_getData() {
+ return this.transport.getData();
+ },
+ /**
+ * @return {Promise} A promise that is resolved when the document's data
+ * is loaded. It is resolved with an {Object} that contains the length
+ * property that indicates size of the PDF data in bytes.
+ */
+ getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() {
+ return this.transport.downloadInfoCapability.promise;
+ },
+ /**
+ * @return {Promise} A promise this is resolved with current stats about
+ * document structures (see {@link PDFDocumentStats}).
+ */
+ getStats: function PDFDocumentProxy_getStats() {
+ return this.transport.getStats();
+ },
+ /**
+ * Cleans up resources allocated by the document, e.g. created @font-face.
+ */
+ cleanup: function PDFDocumentProxy_cleanup() {
+ this.transport.startCleanup();
+ },
+ /**
+ * Destroys current document instance and terminates worker.
+ */
+ destroy: function PDFDocumentProxy_destroy() {
+ return this.loadingTask.destroy();
+ },
+ };
+ return PDFDocumentProxy;
+})();
+
+/**
+ * Page getTextContent parameters.
+ *
+ * @typedef {Object} getTextContentParameters
+ * @property {boolean} normalizeWhitespace - replaces all occurrences of
+ * whitespace with standard spaces (0x20). The default value is `false`.
+ * @property {boolean} disableCombineTextItems - do not attempt to combine
+ * same line {@link TextItem}'s. The default value is `false`.
+ */
+
+/**
+ * Page text content.
+ *
+ * @typedef {Object} TextContent
+ * @property {array} items - array of {@link TextItem}
+ * @property {Object} styles - {@link TextStyles} objects, indexed by font name.
+ */
+
+/**
+ * Page text content part.
+ *
+ * @typedef {Object} TextItem
+ * @property {string} str - text content.
+ * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
+ * @property {array} transform - transformation matrix.
+ * @property {number} width - width in device space.
+ * @property {number} height - height in device space.
+ * @property {string} fontName - font name used by pdf.js for converted font.
+ */
+
+/**
+ * Text style.
+ *
+ * @typedef {Object} TextStyle
+ * @property {number} ascent - font ascent.
+ * @property {number} descent - font descent.
+ * @property {boolean} vertical - text is in vertical mode.
+ * @property {string} fontFamily - possible font family
+ */
+
+/**
+ * Page annotation parameters.
+ *
+ * @typedef {Object} GetAnnotationsParameters
+ * @property {string} intent - Determines the annotations that will be fetched,
+ * can be either 'display' (viewable annotations) or 'print'
+ * (printable annotations).
+ * If the parameter is omitted, all annotations are fetched.
+ */
+
+/**
+ * Page render parameters.
+ *
+ * @typedef {Object} RenderParameters
+ * @property {Object} canvasContext - A 2D context of a DOM Canvas object.
+ * @property {PageViewport} viewport - Rendering viewport obtained by
+ * calling of PDFPage.getViewport method.
+ * @property {string} intent - Rendering intent, can be 'display' or 'print'
+ * (default value is 'display').
+ * @property {boolean} renderInteractiveForms - (optional) Whether or not
+ * interactive form elements are rendered in the display
+ * layer. If so, we do not render them on canvas as well.
+ * @property {Array} transform - (optional) Additional transform, applied
+ * just before viewport transform.
+ * @property {Object} imageLayer - (optional) An object that has beginLayout,
+ * endLayout and appendImage functions.
+ * @property {function} continueCallback - (deprecated) A function that will be
+ * called each time the rendering is paused. To continue
+ * rendering call the function that is the first argument
+ * to the callback.
+ * @property {Object} canvasFactory - (optional) The factory that will be used
+ * when creating canvases. The default value is
+ * {DOMCanvasFactory}.
+ * @property {Object} background - (optional) Background to use for the canvas.
+ * Can use any valid canvas.fillStyle: A DOMString parsed as
+ * CSS <color> value, a CanvasGradient object (a linear or
+ * radial gradient) or a CanvasPattern object (a repetitive
+ * image). The default value is 'rgb(255,255,255)'.
+ */
+
+/**
+ * PDF page operator list.
+ *
+ * @typedef {Object} PDFOperatorList
+ * @property {Array} fnArray - Array containing the operator functions.
+ * @property {Array} argsArray - Array containing the arguments of the
+ * functions.
+ */
+
+/**
+ * Proxy to a PDFPage in the worker thread.
+ * @class
+ * @alias PDFPageProxy
+ */
+var PDFPageProxy = (function PDFPageProxyClosure() {
+ function PDFPageProxy(pageIndex, pageInfo, transport) {
+ this.pageIndex = pageIndex;
+ this.pageInfo = pageInfo;
+ this.transport = transport;
+ this.stats = new StatTimer();
+ this.stats.enabled = getDefaultSetting('enableStats');
+ this.commonObjs = transport.commonObjs;
+ this.objs = new PDFObjects();
+ this.cleanupAfterRender = false;
+ this.pendingCleanup = false;
+ this.intentStates = Object.create(null);
+ this.destroyed = false;
+ }
+ PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
+ /**
+ * @return {number} Page number of the page. First page is 1.
+ */
+ get pageNumber() {
+ return this.pageIndex + 1;
+ },
+ /**
+ * @return {number} The number of degrees the page is rotated clockwise.
+ */
+ get rotate() {
+ return this.pageInfo.rotate;
+ },
+ /**
+ * @return {Object} The reference that points to this page. It has 'num' and
+ * 'gen' properties.
+ */
+ get ref() {
+ return this.pageInfo.ref;
+ },
+ /**
+ * @return {number} The default size of units in 1/72nds of an inch.
+ */
+ get userUnit() {
+ return this.pageInfo.userUnit;
+ },
+ /**
+ * @return {Array} An array of the visible portion of the PDF page in the
+ * user space units - [x1, y1, x2, y2].
+ */
+ get view() {
+ return this.pageInfo.view;
+ },
+ /**
+ * @param {number} scale The desired scale of the viewport.
+ * @param {number} rotate Degrees to rotate the viewport. If omitted this
+ * defaults to the page rotation.
+ * @return {PageViewport} Contains 'width' and 'height' properties
+ * along with transforms required for rendering.
+ */
+ getViewport: function PDFPageProxy_getViewport(scale, rotate) {
+ if (arguments.length < 2) {
+ rotate = this.rotate;
+ }
+ return new PageViewport(this.view, scale, rotate, 0, 0);
+ },
+ /**
+ * @param {GetAnnotationsParameters} params - Annotation parameters.
+ * @return {Promise} A promise that is resolved with an {Array} of the
+ * annotation objects.
+ */
+ getAnnotations: function PDFPageProxy_getAnnotations(params) {
+ var intent = (params && params.intent) || null;
+
+ if (!this.annotationsPromise || this.annotationsIntent !== intent) {
+ this.annotationsPromise = this.transport.getAnnotations(this.pageIndex,
+ intent);
+ this.annotationsIntent = intent;
+ }
+ return this.annotationsPromise;
+ },
+ /**
+ * Begins the process of rendering a page to the desired context.
+ * @param {RenderParameters} params Page render parameters.
+ * @return {RenderTask} An object that contains the promise, which
+ * is resolved when the page finishes rendering.
+ */
+ render: function PDFPageProxy_render(params) {
+ var stats = this.stats;
+ stats.time('Overall');
+
+ // If there was a pending destroy cancel it so no cleanup happens during
+ // this call to render.
+ this.pendingCleanup = false;
+
+ var renderingIntent = (params.intent === 'print' ? 'print' : 'display');
+ var canvasFactory = params.canvasFactory || new DOMCanvasFactory();
+
+ if (!this.intentStates[renderingIntent]) {
+ this.intentStates[renderingIntent] = Object.create(null);
+ }
+ var intentState = this.intentStates[renderingIntent];
+
+ // If there's no displayReadyCapability yet, then the operatorList
+ // was never requested before. Make the request and create the promise.
+ if (!intentState.displayReadyCapability) {
+ intentState.receivingOperatorList = true;
+ intentState.displayReadyCapability = createPromiseCapability();
+ intentState.operatorList = {
+ fnArray: [],
+ argsArray: [],
+ lastChunk: false,
+ };
+
+ this.stats.time('Page Request');
+ this.transport.messageHandler.send('RenderPageRequest', {
+ pageIndex: this.pageNumber - 1,
+ intent: renderingIntent,
+ renderInteractiveForms: (params.renderInteractiveForms === true),
+ });
+ }
+
+ var complete = (error) => {
+ var i = intentState.renderTasks.indexOf(internalRenderTask);
+ if (i >= 0) {
+ intentState.renderTasks.splice(i, 1);
+ }
+
+ if (this.cleanupAfterRender) {
+ this.pendingCleanup = true;
+ }
+ this._tryCleanup();
+
+ if (error) {
+ internalRenderTask.capability.reject(error);
+ } else {
+ internalRenderTask.capability.resolve();
+ }
+ stats.timeEnd('Rendering');
+ stats.timeEnd('Overall');
+ };
+
+ var internalRenderTask = new InternalRenderTask(complete, params,
+ this.objs,
+ this.commonObjs,
+ intentState.operatorList,
+ this.pageNumber,
+ canvasFactory);
+ internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print';
+ if (!intentState.renderTasks) {
+ intentState.renderTasks = [];
+ }
+ intentState.renderTasks.push(internalRenderTask);
+ var renderTask = internalRenderTask.task;
+
+ // Obsolete parameter support
+ if (params.continueCallback) {
+ deprecated('render is used with continueCallback parameter');
+ renderTask.onContinue = params.continueCallback;
+ }
+
+ intentState.displayReadyCapability.promise.then((transparency) => {
+ if (this.pendingCleanup) {
+ complete();
+ return;
+ }
+ stats.time('Rendering');
+ internalRenderTask.initializeGraphics(transparency);
+ internalRenderTask.operatorListChanged();
+ }, complete);
+
+ return renderTask;
+ },
+
+ /**
+ * @return {Promise} A promise resolved with an {@link PDFOperatorList}
+ * object that represents page's operator list.
+ */
+ getOperatorList: function PDFPageProxy_getOperatorList() {
+ function operatorListChanged() {
+ if (intentState.operatorList.lastChunk) {
+ intentState.opListReadCapability.resolve(intentState.operatorList);
+
+ var i = intentState.renderTasks.indexOf(opListTask);
+ if (i >= 0) {
+ intentState.renderTasks.splice(i, 1);
+ }
+ }
+ }
+
+ var renderingIntent = 'oplist';
+ if (!this.intentStates[renderingIntent]) {
+ this.intentStates[renderingIntent] = Object.create(null);
+ }
+ var intentState = this.intentStates[renderingIntent];
+ var opListTask;
+
+ if (!intentState.opListReadCapability) {
+ opListTask = {};
+ opListTask.operatorListChanged = operatorListChanged;
+ intentState.receivingOperatorList = true;
+ intentState.opListReadCapability = createPromiseCapability();
+ intentState.renderTasks = [];
+ intentState.renderTasks.push(opListTask);
+ intentState.operatorList = {
+ fnArray: [],
+ argsArray: [],
+ lastChunk: false,
+ };
+
+ this.transport.messageHandler.send('RenderPageRequest', {
+ pageIndex: this.pageIndex,
+ intent: renderingIntent,
+ });
+ }
+ return intentState.opListReadCapability.promise;
+ },
+
+ /**
+ * @param {getTextContentParameters} params - getTextContent parameters.
+ * @return {Promise} That is resolved a {@link TextContent}
+ * object that represent the page text content.
+ */
+ getTextContent: function PDFPageProxy_getTextContent(params) {
+ params = params || {};
+ return this.transport.messageHandler.sendWithPromise('GetTextContent', {
+ pageIndex: this.pageNumber - 1,
+ normalizeWhitespace: (params.normalizeWhitespace === true),
+ combineTextItems: (params.disableCombineTextItems !== true),
+ });
+ },
+
+ /**
+ * Destroys page object.
+ */
+ _destroy: function PDFPageProxy_destroy() {
+ this.destroyed = true;
+ this.transport.pageCache[this.pageIndex] = null;
+
+ var waitOn = [];
+ Object.keys(this.intentStates).forEach(function(intent) {
+ if (intent === 'oplist') {
+ // Avoid errors below, since the renderTasks are just stubs.
+ return;
+ }
+ var intentState = this.intentStates[intent];
+ intentState.renderTasks.forEach(function(renderTask) {
+ var renderCompleted = renderTask.capability.promise.
+ catch(function () {}); // ignoring failures
+ waitOn.push(renderCompleted);
+ renderTask.cancel();
+ });
+ }, this);
+ this.objs.clear();
+ this.annotationsPromise = null;
+ this.pendingCleanup = false;
+ return Promise.all(waitOn);
+ },
+
+ /**
+ * Cleans up resources allocated by the page. (deprecated)
+ */
+ destroy() {
+ deprecated('page destroy method, use cleanup() instead');
+ this.cleanup();
+ },
+
+ /**
+ * Cleans up resources allocated by the page.
+ */
+ cleanup: function PDFPageProxy_cleanup() {
+ this.pendingCleanup = true;
+ this._tryCleanup();
+ },
+ /**
+ * For internal use only. Attempts to clean up if rendering is in a state
+ * where that's possible.
+ * @ignore
+ */
+ _tryCleanup: function PDFPageProxy_tryCleanup() {
+ if (!this.pendingCleanup ||
+ Object.keys(this.intentStates).some(function(intent) {
+ var intentState = this.intentStates[intent];
+ return (intentState.renderTasks.length !== 0 ||
+ intentState.receivingOperatorList);
+ }, this)) {
+ return;
+ }
+
+ Object.keys(this.intentStates).forEach(function(intent) {
+ delete this.intentStates[intent];
+ }, this);
+ this.objs.clear();
+ this.annotationsPromise = null;
+ this.pendingCleanup = false;
+ },
+ /**
+ * For internal use only.
+ * @ignore
+ */
+ _startRenderPage: function PDFPageProxy_startRenderPage(transparency,
+ intent) {
+ var intentState = this.intentStates[intent];
+ // TODO Refactor RenderPageRequest to separate rendering
+ // and operator list logic
+ if (intentState.displayReadyCapability) {
+ intentState.displayReadyCapability.resolve(transparency);
+ }
+ },
+ /**
+ * For internal use only.
+ * @ignore
+ */
+ _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk,
+ intent) {
+ var intentState = this.intentStates[intent];
+ var i, ii;
+ // Add the new chunk to the current operator list.
+ for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
+ intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
+ intentState.operatorList.argsArray.push(
+ operatorListChunk.argsArray[i]);
+ }
+ intentState.operatorList.lastChunk = operatorListChunk.lastChunk;
+
+ // Notify all the rendering tasks there are more operators to be consumed.
+ for (i = 0; i < intentState.renderTasks.length; i++) {
+ intentState.renderTasks[i].operatorListChanged();
+ }
+
+ if (operatorListChunk.lastChunk) {
+ intentState.receivingOperatorList = false;
+ this._tryCleanup();
+ }
+ },
+ };
+ return PDFPageProxy;
+})();
+
+class LoopbackPort {
+ constructor(defer) {
+ this._listeners = [];
+ this._defer = defer;
+ this._deferred = Promise.resolve(undefined);
+ }
+
+ postMessage(obj, transfers) {
+ function cloneValue(value) {
+ // Trying to perform a structured clone close to the spec, including
+ // transfers.
+ if (typeof value !== 'object' || value === null) {
+ return value;
+ }
+ if (cloned.has(value)) { // already cloned the object
+ return cloned.get(value);
+ }
+ var result;
+ var buffer;
+ if ((buffer = value.buffer) && isArrayBuffer(buffer)) {
+ // We found object with ArrayBuffer (typed array).
+ var transferable = transfers && transfers.indexOf(buffer) >= 0;
+ if (value === buffer) {
+ // Special case when we are faking typed arrays in compatibility.js.
+ result = value;
+ } else if (transferable) {
+ result = new value.constructor(buffer, value.byteOffset,
+ value.byteLength);
+ } else {
+ result = new value.constructor(value);
+ }
+ cloned.set(value, result);
+ return result;
+ }
+ result = isArray(value) ? [] : {};
+ cloned.set(value, result); // adding to cache now for cyclic references
+ // Cloning all value and object properties, however ignoring properties
+ // defined via getter.
+ for (var i in value) {
+ var desc, p = value;
+ while (!(desc = Object.getOwnPropertyDescriptor(p, i))) {
+ p = Object.getPrototypeOf(p);
+ }
+ if (typeof desc.value === 'undefined' ||
+ typeof desc.value === 'function') {
+ continue;
+ }
+ result[i] = cloneValue(desc.value);
+ }
+ return result;
+ }
+
+ if (!this._defer) {
+ this._listeners.forEach(function (listener) {
+ listener.call(this, { data: obj, });
+ }, this);
+ return;
+ }
+
+ var cloned = new WeakMap();
+ var e = { data: cloneValue(obj), };
+ this._deferred.then(() => {
+ this._listeners.forEach(function (listener) {
+ listener.call(this, e);
+ }, this);
+ });
+ }
+
+ addEventListener(name, listener) {
+ this._listeners.push(listener);
+ }
+
+ removeEventListener(name, listener) {
+ var i = this._listeners.indexOf(listener);
+ this._listeners.splice(i, 1);
+ }
+
+ terminate() {
+ this._listeners = [];
+ }
+}
+
+/**
+ * PDF.js web worker abstraction, it controls instantiation of PDF documents and
+ * WorkerTransport for them. If creation of a web worker is not possible,
+ * a "fake" worker will be used instead.
+ * @class
+ */
+var PDFWorker = (function PDFWorkerClosure() {
+ let nextFakeWorkerId = 0;
+
+ function getWorkerSrc() {
+ if (typeof workerSrc !== 'undefined') {
+ return workerSrc;
+ }
+ if (getDefaultSetting('workerSrc')) {
+ return getDefaultSetting('workerSrc');
+ }
+ if (typeof PDFJSDev !== 'undefined' &&
+ PDFJSDev.test('PRODUCTION && !(MOZCENTRAL || FIREFOX)') &&
+ pdfjsFilePath) {
+ return pdfjsFilePath.replace(/(\.(?:min\.)?js)(\?.*)?$/i, '.worker$1$2');
+ }
+ error('No PDFJS.workerSrc specified');
+ }
+
+ let fakeWorkerFilesLoadedCapability;
+
+ // Loads worker code into main thread.
+ function setupFakeWorkerGlobal() {
+ var WorkerMessageHandler;
+ if (fakeWorkerFilesLoadedCapability) {
+ return fakeWorkerFilesLoadedCapability.promise;
+ }
+ fakeWorkerFilesLoadedCapability = createPromiseCapability();
+ // In the developer build load worker_loader which in turn loads all the
+ // other files and resolves the promise. In production only the
+ // pdf.worker.js file is needed.
+ if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {
+ if (typeof SystemJS === 'object') {
+ Promise.all([SystemJS.import('pdfjs/core/network'),
+ SystemJS.import('pdfjs/core/worker')]).then((modules) => {
+ var worker = modules[1];
+ WorkerMessageHandler = worker.WorkerMessageHandler;
+ fakeWorkerFilesLoadedCapability.resolve(WorkerMessageHandler);
+ });
+ } else if (typeof require === 'function') {
+ var worker = require('../core/worker.js');
+ WorkerMessageHandler = worker.WorkerMessageHandler;
+ fakeWorkerFilesLoadedCapability.resolve(WorkerMessageHandler);
+ } else {
+ throw new Error(
+ 'SystemJS or CommonJS must be used to load fake worker.');
+ }
+ } else if (PDFJSDev.test('SINGLE_FILE')) {
+ var pdfjsCoreWorker = require('../core/worker.js');
+ require('../core/network.js');
+ WorkerMessageHandler = pdfjsCoreWorker.WorkerMessageHandler;
+ fakeWorkerFilesLoadedCapability.resolve(WorkerMessageHandler);
+ } else {
+ var loader = fakeWorkerFilesLoader || function (callback) {
+ Util.loadScript(getWorkerSrc(), function () {
+ callback(window.pdfjsDistBuildPdfWorker.WorkerMessageHandler);
+ });
+ };
+ loader(fakeWorkerFilesLoadedCapability.resolve);
+ }
+ return fakeWorkerFilesLoadedCapability.promise;
+ }
+
+ function createCDNWrapper(url) {
+ // We will rely on blob URL's property to specify origin.
+ // We want this function to fail in case if createObjectURL or Blob do not
+ // exist or fail for some reason -- our Worker creation will fail anyway.
+ var wrapper = 'importScripts(\'' + url + '\');';
+ return URL.createObjectURL(new Blob([wrapper]));
+ }
+
+ let pdfWorkerPorts = new WeakMap();
+
+ function PDFWorker(name, port) {
+ if (pdfWorkerPorts.has(port)) {
+ throw new Error('Cannot use more than one PDFWorker per port');
+ }
+
+ this.name = name;
+ this.destroyed = false;
+
+ this._readyCapability = createPromiseCapability();
+ this._port = null;
+ this._webWorker = null;
+ this._messageHandler = null;
+
+ if (port) {
+ pdfWorkerPorts.set(port, this);
+ this._initializeFromPort(port);
+ return;
+ }
+
+ this._initialize();
+ }
+
+ PDFWorker.prototype = /** @lends PDFWorker.prototype */ {
+ get promise() {
+ return this._readyCapability.promise;
+ },
+
+ get port() {
+ return this._port;
+ },
+
+ get messageHandler() {
+ return this._messageHandler;
+ },
+
+ _initializeFromPort: function PDFWorker_initializeFromPort(port) {
+ this._port = port;
+ this._messageHandler = new MessageHandler('main', 'worker', port);
+ this._messageHandler.on('ready', function () {
+ // Ignoring 'ready' event -- MessageHandler shall be already initialized
+ // and ready to accept the messages.
+ });
+ this._readyCapability.resolve();
+ },
+
+ _initialize: function PDFWorker_initialize() {
+ // If worker support isn't disabled explicit and the browser has worker
+ // support, create a new web worker and test if it/the browser fulfills
+ // all requirements to run parts of pdf.js in a web worker.
+ // Right now, the requirement is, that an Uint8Array is still an
+ // Uint8Array as it arrives on the worker. (Chrome added this with v.15.)
+ if ((typeof PDFJSDev === 'undefined' || !PDFJSDev.test('SINGLE_FILE')) &&
+ !isWorkerDisabled && !getDefaultSetting('disableWorker') &&
+ typeof Worker !== 'undefined') {
+ var workerSrc = getWorkerSrc();
+
+ try {
+ // Wraps workerSrc path into blob URL, if the former does not belong
+ // to the same origin.
+ if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('GENERIC') &&
+ !isSameOrigin(window.location.href, workerSrc)) {
+ workerSrc = createCDNWrapper(
+ new URL(workerSrc, window.location).href);
+ }
+
+ // Some versions of FF can't create a worker on localhost, see:
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=683280
+ var worker = new Worker(workerSrc);
+ var messageHandler = new MessageHandler('main', 'worker', worker);
+ var terminateEarly = () => {
+ worker.removeEventListener('error', onWorkerError);
+ messageHandler.destroy();
+ worker.terminate();
+ if (this.destroyed) {
+ this._readyCapability.reject(new Error('Worker was destroyed'));
+ } else {
+ // Fall back to fake worker if the termination is caused by an
+ // error (e.g. NetworkError / SecurityError).
+ this._setupFakeWorker();
+ }
+ };
+
+ var onWorkerError = () => {
+ if (!this._webWorker) {
+ // Worker failed to initialize due to an error. Clean up and fall
+ // back to the fake worker.
+ terminateEarly();
+ }
+ };
+ worker.addEventListener('error', onWorkerError);
+
+ messageHandler.on('test', (data) => {
+ worker.removeEventListener('error', onWorkerError);
+ if (this.destroyed) {
+ terminateEarly();
+ return; // worker was destroyed
+ }
+ var supportTypedArray = data && data.supportTypedArray;
+ if (supportTypedArray) {
+ this._messageHandler = messageHandler;
+ this._port = worker;
+ this._webWorker = worker;
+ if (!data.supportTransfers) {
+ isPostMessageTransfersDisabled = true;
+ }
+ this._readyCapability.resolve();
+ // Send global setting, e.g. verbosity level.
+ messageHandler.send('configure', {
+ verbosity: getVerbosityLevel(),
+ });
+ } else {
+ this._setupFakeWorker();
+ messageHandler.destroy();
+ worker.terminate();
+ }
+ });
+
+ messageHandler.on('console_log', function (data) {
+ console.log.apply(console, data);
+ });
+ messageHandler.on('console_error', function (data) {
+ console.error.apply(console, data);
+ });
+
+ messageHandler.on('ready', (data) => {
+ worker.removeEventListener('error', onWorkerError);
+ if (this.destroyed) {
+ terminateEarly();
+ return; // worker was destroyed
+ }
+ try {
+ sendTest();
+ } catch (e) {
+ // We need fallback to a faked worker.
+ this._setupFakeWorker();
+ }
+ });
+
+ var sendTest = function () {
+ var postMessageTransfers =
+ getDefaultSetting('postMessageTransfers') &&
+ !isPostMessageTransfersDisabled;
+ var testObj = new Uint8Array([postMessageTransfers ? 255 : 0]);
+ // Some versions of Opera throw a DATA_CLONE_ERR on serializing the
+ // typed array. Also, checking if we can use transfers.
+ try {
+ messageHandler.send('test', testObj, [testObj.buffer]);
+ } catch (ex) {
+ info('Cannot use postMessage transfers');
+ testObj[0] = 0;
+ messageHandler.send('test', testObj);
+ }
+ };
+
+ // It might take time for worker to initialize (especially when AMD
+ // loader is used). We will try to send test immediately, and then
+ // when 'ready' message will arrive. The worker shall process only
+ // first received 'test'.
+ sendTest();
+ return;
+ } catch (e) {
+ info('The worker has been disabled.');
+ }
+ }
+ // Either workers are disabled, not supported or have thrown an exception.
+ // Thus, we fallback to a faked worker.
+ this._setupFakeWorker();
+ },
+
+ _setupFakeWorker: function PDFWorker_setupFakeWorker() {
+ if (!isWorkerDisabled && !getDefaultSetting('disableWorker')) {
+ warn('Setting up fake worker.');
+ isWorkerDisabled = true;
+ }
+
+ setupFakeWorkerGlobal().then((WorkerMessageHandler) => {
+ if (this.destroyed) {
+ this._readyCapability.reject(new Error('Worker was destroyed'));
+ return;
+ }
+
+ // We cannot turn on proper fake port simulation (this includes
+ // structured cloning) when typed arrays are not supported. Relying
+ // on a chance that messages will be sent in proper order.
+ var isTypedArraysPresent = Uint8Array !== Float32Array;
+ var port = new LoopbackPort(isTypedArraysPresent);
+ this._port = port;
+
+ // All fake workers use the same port, making id unique.
+ var id = 'fake' + (nextFakeWorkerId++);
+
+ // If the main thread is our worker, setup the handling for the
+ // messages -- the main thread sends to it self.
+ var workerHandler = new MessageHandler(id + '_worker', id, port);
+ WorkerMessageHandler.setup(workerHandler, port);
+
+ var messageHandler = new MessageHandler(id, id + '_worker', port);
+ this._messageHandler = messageHandler;
+ this._readyCapability.resolve();
+ });
+ },
+
+ /**
+ * Destroys the worker instance.
+ */
+ destroy: function PDFWorker_destroy() {
+ this.destroyed = true;
+ if (this._webWorker) {
+ // We need to terminate only web worker created resource.
+ this._webWorker.terminate();
+ this._webWorker = null;
+ }
+ this._port = null;
+ if (this._messageHandler) {
+ this._messageHandler.destroy();
+ this._messageHandler = null;
+ }
+ },
+ };
+
+ PDFWorker.fromPort = function (port) {
+ if (pdfWorkerPorts.has(port)) {
+ return pdfWorkerPorts.get(port);
+ }
+ return new PDFWorker(null, port);
+ };
+
+ return PDFWorker;
+})();
+
+/**
+ * For internal use only.
+ * @ignore
+ */
+var WorkerTransport = (function WorkerTransportClosure() {
+ function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport,
+ CMapReaderFactory) {
+ this.messageHandler = messageHandler;
+ this.loadingTask = loadingTask;
+ this.pdfDataRangeTransport = pdfDataRangeTransport;
+ this.commonObjs = new PDFObjects();
+ this.fontLoader = new FontLoader(loadingTask.docId);
+ this.CMapReaderFactory = new CMapReaderFactory({
+ baseUrl: getDefaultSetting('cMapUrl'),
+ isCompressed: getDefaultSetting('cMapPacked'),
+ });
+
+ this.destroyed = false;
+ this.destroyCapability = null;
+ this._passwordCapability = null;
+
+ this.pageCache = [];
+ this.pagePromises = [];
+ this.downloadInfoCapability = createPromiseCapability();
+
+ this.setupMessageHandler();
+ }
+ WorkerTransport.prototype = {
+ destroy: function WorkerTransport_destroy() {
+ if (this.destroyCapability) {
+ return this.destroyCapability.promise;
+ }
+
+ this.destroyed = true;
+ this.destroyCapability = createPromiseCapability();
+
+ if (this._passwordCapability) {
+ this._passwordCapability.reject(
+ new Error('Worker was destroyed during onPassword callback'));
+ }
+
+ var waitOn = [];
+ // We need to wait for all renderings to be completed, e.g.
+ // timeout/rAF can take a long time.
+ this.pageCache.forEach(function (page) {
+ if (page) {
+ waitOn.push(page._destroy());
+ }
+ });
+ this.pageCache = [];
+ this.pagePromises = [];
+ // We also need to wait for the worker to finish its long running tasks.
+ var terminated = this.messageHandler.sendWithPromise('Terminate', null);
+ waitOn.push(terminated);
+ Promise.all(waitOn).then(() => {
+ this.fontLoader.clear();
+ if (this.pdfDataRangeTransport) {
+ this.pdfDataRangeTransport.abort();
+ this.pdfDataRangeTransport = null;
+ }
+ if (this.messageHandler) {
+ this.messageHandler.destroy();
+ this.messageHandler = null;
+ }
+ this.destroyCapability.resolve();
+ }, this.destroyCapability.reject);
+ return this.destroyCapability.promise;
+ },
+
+ setupMessageHandler: function WorkerTransport_setupMessageHandler() {
+ var messageHandler = this.messageHandler;
+ var loadingTask = this.loadingTask;
+
+ var pdfDataRangeTransport = this.pdfDataRangeTransport;
+ if (pdfDataRangeTransport) {
+ pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
+ messageHandler.send('OnDataRange', {
+ begin,
+ chunk,
+ });
+ });
+
+ pdfDataRangeTransport.addProgressListener(function(loaded) {
+ messageHandler.send('OnDataProgress', {
+ loaded,
+ });
+ });
+
+ pdfDataRangeTransport.addProgressiveReadListener(function(chunk) {
+ messageHandler.send('OnDataRange', {
+ chunk,
+ });
+ });
+
+ messageHandler.on('RequestDataRange',
+ function transportDataRange(data) {
+ pdfDataRangeTransport.requestDataRange(data.begin, data.end);
+ }, this);
+ }
+
+ messageHandler.on('GetDoc', function transportDoc(data) {
+ var pdfInfo = data.pdfInfo;
+ this.numPages = data.pdfInfo.numPages;
+ var loadingTask = this.loadingTask;
+ var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask);
+ this.pdfDocument = pdfDocument;
+ loadingTask._capability.resolve(pdfDocument);
+ }, this);
+
+ messageHandler.on('PasswordRequest',
+ function transportPasswordRequest(exception) {
+ this._passwordCapability = createPromiseCapability();
+
+ if (loadingTask.onPassword) {
+ var updatePassword = (password) => {
+ this._passwordCapability.resolve({
+ password,
+ });
+ };
+ loadingTask.onPassword(updatePassword, exception.code);
+ } else {
+ this._passwordCapability.reject(
+ new PasswordException(exception.message, exception.code));
+ }
+ return this._passwordCapability.promise;
+ }, this);
+
+ messageHandler.on('PasswordException',
+ function transportPasswordException(exception) {
+ loadingTask._capability.reject(
+ new PasswordException(exception.message, exception.code));
+ }, this);
+
+ messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) {
+ this.loadingTask._capability.reject(
+ new InvalidPDFException(exception.message));
+ }, this);
+
+ messageHandler.on('MissingPDF', function transportMissingPDF(exception) {
+ this.loadingTask._capability.reject(
+ new MissingPDFException(exception.message));
+ }, this);
+
+ messageHandler.on('UnexpectedResponse',
+ function transportUnexpectedResponse(exception) {
+ this.loadingTask._capability.reject(
+ new UnexpectedResponseException(exception.message, exception.status));
+ }, this);
+
+ messageHandler.on('UnknownError',
+ function transportUnknownError(exception) {
+ this.loadingTask._capability.reject(
+ new UnknownErrorException(exception.message, exception.details));
+ }, this);
+
+ messageHandler.on('DataLoaded', function transportPage(data) {
+ this.downloadInfoCapability.resolve(data);
+ }, this);
+
+ messageHandler.on('PDFManagerReady', function transportPage(data) {
+ if (this.pdfDataRangeTransport) {
+ this.pdfDataRangeTransport.transportReady();
+ }
+ }, this);
+
+ messageHandler.on('StartRenderPage', function transportRender(data) {
+ if (this.destroyed) {
+ return; // Ignore any pending requests if the worker was terminated.
+ }
+ var page = this.pageCache[data.pageIndex];
+
+ page.stats.timeEnd('Page Request');
+ page._startRenderPage(data.transparency, data.intent);
+ }, this);
+
+ messageHandler.on('RenderPageChunk', function transportRender(data) {
+ if (this.destroyed) {
+ return; // Ignore any pending requests if the worker was terminated.
+ }
+ var page = this.pageCache[data.pageIndex];
+
+ page._renderPageChunk(data.operatorList, data.intent);
+ }, this);
+
+ messageHandler.on('commonobj', function transportObj(data) {
+ if (this.destroyed) {
+ return; // Ignore any pending requests if the worker was terminated.
+ }
+
+ var id = data[0];
+ var type = data[1];
+ if (this.commonObjs.hasData(id)) {
+ return;
+ }
+
+ switch (type) {
+ case 'Font':
+ var exportedData = data[2];
+
+ if ('error' in exportedData) {
+ var exportedError = exportedData.error;
+ warn('Error during font loading: ' + exportedError);
+ this.commonObjs.resolve(id, exportedError);
+ break;
+ }
+ var fontRegistry = null;
+ if (getDefaultSetting('pdfBug') && globalScope.FontInspector &&
+ globalScope['FontInspector'].enabled) {
+ fontRegistry = {
+ registerFont(font, url) {
+ globalScope['FontInspector'].fontAdded(font, url);
+ },
+ };
+ }
+ var font = new FontFaceObject(exportedData, {
+ isEvalSuported: getDefaultSetting('isEvalSupported'),
+ disableFontFace: getDefaultSetting('disableFontFace'),
+ fontRegistry,
+ });
+ var fontReady = (fontObjs) => {
+ this.commonObjs.resolve(id, font);
+ };
+
+ this.fontLoader.bind([font], fontReady);
+ break;
+ case 'FontPath':
+ this.commonObjs.resolve(id, data[2]);
+ break;
+ default:
+ error('Got unknown common object type ' + type);
+ }
+ }, this);
+
+ messageHandler.on('obj', function transportObj(data) {
+ if (this.destroyed) {
+ return; // Ignore any pending requests if the worker was terminated.
+ }
+
+ var id = data[0];
+ var pageIndex = data[1];
+ var type = data[2];
+ var pageProxy = this.pageCache[pageIndex];
+ var imageData;
+ if (pageProxy.objs.hasData(id)) {
+ return;
+ }
+
+ switch (type) {
+ case 'JpegStream':
+ imageData = data[3];
+ loadJpegStream(id, imageData, pageProxy.objs);
+ break;
+ case 'Image':
+ imageData = data[3];
+ pageProxy.objs.resolve(id, imageData);
+
+ // heuristics that will allow not to store large data
+ var MAX_IMAGE_SIZE_TO_STORE = 8000000;
+ if (imageData && 'data' in imageData &&
+ imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
+ pageProxy.cleanupAfterRender = true;
+ }
+ break;
+ default:
+ error('Got unknown object type ' + type);
+ }
+ }, this);
+
+ messageHandler.on('DocProgress', function transportDocProgress(data) {
+ if (this.destroyed) {
+ return; // Ignore any pending requests if the worker was terminated.
+ }
+
+ var loadingTask = this.loadingTask;
+ if (loadingTask.onProgress) {
+ loadingTask.onProgress({
+ loaded: data.loaded,
+ total: data.total,
+ });
+ }
+ }, this);
+
+ messageHandler.on('PageError', function transportError(data) {
+ if (this.destroyed) {
+ return; // Ignore any pending requests if the worker was terminated.
+ }
+
+ var page = this.pageCache[data.pageNum - 1];
+ var intentState = page.intentStates[data.intent];
+
+ if (intentState.displayReadyCapability) {
+ intentState.displayReadyCapability.reject(data.error);
+ } else {
+ error(data.error);
+ }
+
+ if (intentState.operatorList) {
+ // Mark operator list as complete.
+ intentState.operatorList.lastChunk = true;
+ for (var i = 0; i < intentState.renderTasks.length; i++) {
+ intentState.renderTasks[i].operatorListChanged();
+ }
+ }
+ }, this);
+
+ messageHandler.on('UnsupportedFeature',
+ function transportUnsupportedFeature(data) {
+ if (this.destroyed) {
+ return; // Ignore any pending requests if the worker was terminated.
+ }
+ var featureId = data.featureId;
+ var loadingTask = this.loadingTask;
+ if (loadingTask.onUnsupportedFeature) {
+ loadingTask.onUnsupportedFeature(featureId);
+ }
+ _UnsupportedManager.notify(featureId);
+ }, this);
+
+ messageHandler.on('JpegDecode', function(data) {
+ if (this.destroyed) {
+ return Promise.reject(new Error('Worker was destroyed'));
+ }
+
+ if (typeof document === 'undefined') {
+ // Make sure that this code is not executing in node.js, as
+ // it's using DOM image, and there is no library to support that.
+ return Promise.reject(new Error('"document" is not defined.'));
+ }
+
+ var imageUrl = data[0];
+ var components = data[1];
+ if (components !== 3 && components !== 1) {
+ return Promise.reject(
+ new Error('Only 3 components or 1 component can be returned'));
+ }
+
+ return new Promise(function (resolve, reject) {
+ var img = new Image();
+ img.onload = function () {
+ var width = img.width;
+ var height = img.height;
+ var size = width * height;
+ var rgbaLength = size * 4;
+ var buf = new Uint8Array(size * components);
+ var tmpCanvas = document.createElement('canvas');
+ tmpCanvas.width = width;
+ tmpCanvas.height = height;
+ var tmpCtx = tmpCanvas.getContext('2d');
+ tmpCtx.drawImage(img, 0, 0);
+ var data = tmpCtx.getImageData(0, 0, width, height).data;
+ var i, j;
+
+ if (components === 3) {
+ for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
+ buf[j] = data[i];
+ buf[j + 1] = data[i + 1];
+ buf[j + 2] = data[i + 2];
+ }
+ } else if (components === 1) {
+ for (i = 0, j = 0; i < rgbaLength; i += 4, j++) {
+ buf[j] = data[i];
+ }
+ }
+ resolve({ data: buf, width, height, });
+ };
+ img.onerror = function () {
+ reject(new Error('JpegDecode failed to load image'));
+ };
+ img.src = imageUrl;
+ });
+ }, this);
+
+ messageHandler.on('FetchBuiltInCMap', function (data) {
+ if (this.destroyed) {
+ return Promise.reject(new Error('Worker was destroyed'));
+ }
+ return this.CMapReaderFactory.fetch({
+ name: data.name,
+ });
+ }, this);
+ },
+
+ getData: function WorkerTransport_getData() {
+ return this.messageHandler.sendWithPromise('GetData', null);
+ },
+
+ getPage: function WorkerTransport_getPage(pageNumber, capability) {
+ if (!isInt(pageNumber) || pageNumber <= 0 || pageNumber > this.numPages) {
+ return Promise.reject(new Error('Invalid page request'));
+ }
+
+ var pageIndex = pageNumber - 1;
+ if (pageIndex in this.pagePromises) {
+ return this.pagePromises[pageIndex];
+ }
+ var promise = this.messageHandler.sendWithPromise('GetPage', {
+ pageIndex,
+ }).then((pageInfo) => {
+ if (this.destroyed) {
+ throw new Error('Transport destroyed');
+ }
+ var page = new PDFPageProxy(pageIndex, pageInfo, this);
+ this.pageCache[pageIndex] = page;
+ return page;
+ });
+ this.pagePromises[pageIndex] = promise;
+ return promise;
+ },
+
+ getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
+ return this.messageHandler.sendWithPromise('GetPageIndex', {
+ ref,
+ }).catch(function (reason) {
+ return Promise.reject(new Error(reason));
+ });
+ },
+
+ getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) {
+ return this.messageHandler.sendWithPromise('GetAnnotations', {
+ pageIndex,
+ intent,
+ });
+ },
+
+ getDestinations: function WorkerTransport_getDestinations() {
+ return this.messageHandler.sendWithPromise('GetDestinations', null);
+ },
+
+ getDestination: function WorkerTransport_getDestination(id) {
+ return this.messageHandler.sendWithPromise('GetDestination', {
+ id,
+ });
+ },
+
+ getPageLabels: function WorkerTransport_getPageLabels() {
+ return this.messageHandler.sendWithPromise('GetPageLabels', null);
+ },
+
+ getAttachments: function WorkerTransport_getAttachments() {
+ return this.messageHandler.sendWithPromise('GetAttachments', null);
+ },
+
+ getJavaScript: function WorkerTransport_getJavaScript() {
+ return this.messageHandler.sendWithPromise('GetJavaScript', null);
+ },
+
+ getOutline: function WorkerTransport_getOutline() {
+ return this.messageHandler.sendWithPromise('GetOutline', null);
+ },
+
+ getMetadata: function WorkerTransport_getMetadata() {
+ return this.messageHandler.sendWithPromise('GetMetadata', null).
+ then(function transportMetadata(results) {
+ return {
+ info: results[0],
+ metadata: (results[1] ? new Metadata(results[1]) : null),
+ };
+ });
+ },
+
+ getStats: function WorkerTransport_getStats() {
+ return this.messageHandler.sendWithPromise('GetStats', null);
+ },
+
+ startCleanup: function WorkerTransport_startCleanup() {
+ this.messageHandler.sendWithPromise('Cleanup', null).then(() => {
+ for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
+ var page = this.pageCache[i];
+ if (page) {
+ page.cleanup();
+ }
+ }
+ this.commonObjs.clear();
+ this.fontLoader.clear();
+ });
+ },
+ };
+ return WorkerTransport;
+
+})();
+
+/**
+ * A PDF document and page is built of many objects. E.g. there are objects
+ * for fonts, images, rendering code and such. These objects might get processed
+ * inside of a worker. The `PDFObjects` implements some basic functions to
+ * manage these objects.
+ * @ignore
+ */
+var PDFObjects = (function PDFObjectsClosure() {
+ function PDFObjects() {
+ this.objs = Object.create(null);
+ }
+
+ PDFObjects.prototype = {
+ /**
+ * Internal function.
+ * Ensures there is an object defined for `objId`.
+ */
+ ensureObj: function PDFObjects_ensureObj(objId) {
+ if (this.objs[objId]) {
+ return this.objs[objId];
+ }
+
+ var obj = {
+ capability: createPromiseCapability(),
+ data: null,
+ resolved: false,
+ };
+ this.objs[objId] = obj;
+
+ return obj;
+ },
+
+ /**
+ * If called *without* callback, this returns the data of `objId` but the
+ * object needs to be resolved. If it isn't, this function throws.
+ *
+ * If called *with* a callback, the callback is called with the data of the
+ * object once the object is resolved. That means, if you call this
+ * function and the object is already resolved, the callback gets called
+ * right away.
+ */
+ get: function PDFObjects_get(objId, callback) {
+ // If there is a callback, then the get can be async and the object is
+ // not required to be resolved right now
+ if (callback) {
+ this.ensureObj(objId).capability.promise.then(callback);
+ return null;
+ }
+
+ // If there isn't a callback, the user expects to get the resolved data
+ // directly.
+ var obj = this.objs[objId];
+
+ // If there isn't an object yet or the object isn't resolved, then the
+ // data isn't ready yet!
+ if (!obj || !obj.resolved) {
+ error('Requesting object that isn\'t resolved yet ' + objId);
+ }
+
+ return obj.data;
+ },
+
+ /**
+ * Resolves the object `objId` with optional `data`.
+ */
+ resolve: function PDFObjects_resolve(objId, data) {
+ var obj = this.ensureObj(objId);
+
+ obj.resolved = true;
+ obj.data = data;
+ obj.capability.resolve(data);
+ },
+
+ isResolved: function PDFObjects_isResolved(objId) {
+ var objs = this.objs;
+
+ if (!objs[objId]) {
+ return false;
+ }
+ return objs[objId].resolved;
+ },
+
+ hasData: function PDFObjects_hasData(objId) {
+ return this.isResolved(objId);
+ },
+
+ /**
+ * Returns the data of `objId` if object exists, null otherwise.
+ */
+ getData: function PDFObjects_getData(objId) {
+ var objs = this.objs;
+ if (!objs[objId] || !objs[objId].resolved) {
+ return null;
+ }
+ return objs[objId].data;
+ },
+
+ clear: function PDFObjects_clear() {
+ this.objs = Object.create(null);
+ },
+ };
+ return PDFObjects;
+})();
+
+/**
+ * Allows controlling of the rendering tasks.
+ * @class
+ * @alias RenderTask
+ */
+var RenderTask = (function RenderTaskClosure() {
+ function RenderTask(internalRenderTask) {
+ this._internalRenderTask = internalRenderTask;
+
+ /**
+ * Callback for incremental rendering -- a function that will be called
+ * each time the rendering is paused. To continue rendering call the
+ * function that is the first argument to the callback.
+ * @type {function}
+ */
+ this.onContinue = null;
+ }
+
+ RenderTask.prototype = /** @lends RenderTask.prototype */ {
+ /**
+ * Promise for rendering task completion.
+ * @return {Promise}
+ */
+ get promise() {
+ return this._internalRenderTask.capability.promise;
+ },
+
+ /**
+ * Cancels the rendering task. If the task is currently rendering it will
+ * not be cancelled until graphics pauses with a timeout. The promise that
+ * this object extends will be rejected when cancelled.
+ */
+ cancel: function RenderTask_cancel() {
+ this._internalRenderTask.cancel();
+ },
+
+ /**
+ * Registers callbacks to indicate the rendering task completion.
+ *
+ * @param {function} onFulfilled The callback for the rendering completion.
+ * @param {function} onRejected The callback for the rendering failure.
+ * @return {Promise} A promise that is resolved after the onFulfilled or
+ * onRejected callback.
+ */
+ then: function RenderTask_then(onFulfilled, onRejected) {
+ return this.promise.then.apply(this.promise, arguments);
+ },
+ };
+
+ return RenderTask;
+})();
+
+/**
+ * For internal use only.
+ * @ignore
+ */
+var InternalRenderTask = (function InternalRenderTaskClosure() {
+
+ function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
+ pageNumber, canvasFactory) {
+ this.callback = callback;
+ this.params = params;
+ this.objs = objs;
+ this.commonObjs = commonObjs;
+ this.operatorListIdx = null;
+ this.operatorList = operatorList;
+ this.pageNumber = pageNumber;
+ this.canvasFactory = canvasFactory;
+ this.running = false;
+ this.graphicsReadyCallback = null;
+ this.graphicsReady = false;
+ this.useRequestAnimationFrame = false;
+ this.cancelled = false;
+ this.capability = createPromiseCapability();
+ this.task = new RenderTask(this);
+ // caching this-bound methods
+ this._continueBound = this._continue.bind(this);
+ this._scheduleNextBound = this._scheduleNext.bind(this);
+ this._nextBound = this._next.bind(this);
+ }
+
+ InternalRenderTask.prototype = {
+
+ initializeGraphics:
+ function InternalRenderTask_initializeGraphics(transparency) {
+
+ if (this.cancelled) {
+ return;
+ }
+ if (getDefaultSetting('pdfBug') && globalScope.StepperManager &&
+ globalScope.StepperManager.enabled) {
+ this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
+ this.stepper.init(this.operatorList);
+ this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
+ }
+
+ var params = this.params;
+ this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
+ this.objs, this.canvasFactory,
+ params.imageLayer);
+
+ this.gfx.beginDrawing({
+ transform: params.transform,
+ viewport: params.viewport,
+ transparency,
+ background: params.background,
+ });
+ this.operatorListIdx = 0;
+ this.graphicsReady = true;
+ if (this.graphicsReadyCallback) {
+ this.graphicsReadyCallback();
+ }
+ },
+
+ cancel: function InternalRenderTask_cancel() {
+ this.running = false;
+ this.cancelled = true;
+
+ if ((typeof PDFJSDev !== 'undefined' && PDFJSDev.test('PDFJS_NEXT')) ||
+ getDefaultSetting('pdfjsNext')) {
+ this.callback(new RenderingCancelledException(
+ 'Rendering cancelled, page ' + this.pageNumber, 'canvas'));
+ } else {
+ this.callback('cancelled');
+ }
+ },
+
+ operatorListChanged: function InternalRenderTask_operatorListChanged() {
+ if (!this.graphicsReady) {
+ if (!this.graphicsReadyCallback) {
+ this.graphicsReadyCallback = this._continueBound;
+ }
+ return;
+ }
+
+ if (this.stepper) {
+ this.stepper.updateOperatorList(this.operatorList);
+ }
+
+ if (this.running) {
+ return;
+ }
+ this._continue();
+ },
+
+ _continue: function InternalRenderTask__continue() {
+ this.running = true;
+ if (this.cancelled) {
+ return;
+ }
+ if (this.task.onContinue) {
+ this.task.onContinue(this._scheduleNextBound);
+ } else {
+ this._scheduleNext();
+ }
+ },
+
+ _scheduleNext: function InternalRenderTask__scheduleNext() {
+ if (this.useRequestAnimationFrame && typeof window !== 'undefined') {
+ window.requestAnimationFrame(this._nextBound);
+ } else {
+ Promise.resolve(undefined).then(this._nextBound);
+ }
+ },
+
+ _next: function InternalRenderTask__next() {
+ if (this.cancelled) {
+ return;
+ }
+ this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
+ this.operatorListIdx,
+ this._continueBound,
+ this.stepper);
+ if (this.operatorListIdx === this.operatorList.argsArray.length) {
+ this.running = false;
+ if (this.operatorList.lastChunk) {
+ this.gfx.endDrawing();
+ this.callback();
+ }
+ }
+ },
+
+ };
+
+ return InternalRenderTask;
+})();
+
+/**
+ * (Deprecated) Global observer of unsupported feature usages. Use
+ * onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance.
+ */
+var _UnsupportedManager = (function UnsupportedManagerClosure() {
+ var listeners = [];
+ return {
+ listen(cb) {
+ deprecated('Global UnsupportedManager.listen is used: ' +
+ ' use PDFDocumentLoadingTask.onUnsupportedFeature instead');
+ listeners.push(cb);
+ },
+ notify(featureId) {
+ for (var i = 0, ii = listeners.length; i < ii; i++) {
+ listeners[i](featureId);
+ }
+ },
+ };
+})();
+
+var version, build;
+if (typeof PDFJSDev !== 'undefined') {
+ version = PDFJSDev.eval('BUNDLE_VERSION');
+ build = PDFJSDev.eval('BUNDLE_BUILD');
+}
+
+export {
+ getDocument,
+ LoopbackPort,
+ PDFDataRangeTransport,
+ PDFWorker,
+ PDFDocumentProxy,
+ PDFPageProxy,
+ _UnsupportedManager,
+ version,
+ build,
+};
+
+
+