pdfjs-dist/lib/display/api.js

/* Copyright 2017 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.
 */
'use strict';
var sharedUtil = require('../shared/util.js');
var displayFontLoader = require('./font_loader.js');
var displayCanvas = require('./canvas.js');
var displayMetadata = require('./metadata.js');
var displayDOMUtils = require('./dom_utils.js');
var amdRequire;
var InvalidPDFException = sharedUtil.InvalidPDFException;
var MessageHandler = sharedUtil.MessageHandler;
var MissingPDFException = sharedUtil.MissingPDFException;
var PageViewport = sharedUtil.PageViewport;
var PasswordException = sharedUtil.PasswordException;
var StatTimer = sharedUtil.StatTimer;
var UnexpectedResponseException = sharedUtil.UnexpectedResponseException;
var UnknownErrorException = sharedUtil.UnknownErrorException;
var Util = sharedUtil.Util;
var createPromiseCapability = sharedUtil.createPromiseCapability;
var error = sharedUtil.error;
var deprecated = sharedUtil.deprecated;
var getVerbosityLevel = sharedUtil.getVerbosityLevel;
var info = sharedUtil.info;
var isInt = sharedUtil.isInt;
var isArray = sharedUtil.isArray;
var isArrayBuffer = sharedUtil.isArrayBuffer;
var isSameOrigin = sharedUtil.isSameOrigin;
var loadJpegStream = sharedUtil.loadJpegStream;
var stringToBytes = sharedUtil.stringToBytes;
var globalScope = sharedUtil.globalScope;
var warn = sharedUtil.warn;
var FontFaceObject = displayFontLoader.FontFaceObject;
var FontLoader = displayFontLoader.FontLoader;
var CanvasGraphics = displayCanvas.CanvasGraphics;
var Metadata = displayMetadata.Metadata;
var getDefaultSetting = displayDOMUtils.getDefaultSetting;
var DOMCanvasFactory = displayDOMUtils.DOMCanvasFactory;
var DOMCMapReaderFactory = displayDOMUtils.DOMCMapReaderFactory;
var DEFAULT_RANGE_CHUNK_SIZE = 65536;
var isWorkerDisabled = false;
var workerSrc;
var isPostMessageTransfersDisabled = false;
var pdfjsFilePath = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : null;
var fakeWorkerFilesLoader = null;
var useRequireEnsure = false;
if (typeof __pdfjsdev_webpack__ === 'undefined') {
 if (typeof window === 'undefined') {
  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 = require('./pdf.worker.js');
   callback(worker.WorkerMessageHandler);
  });
 } : dynamicLoaderSupported ? function (callback) {
  requirejs(['pdfjs-dist/build/pdf.worker'], function (worker) {
   callback(worker.WorkerMessageHandler);
  });
 } : null;
}
function getDocument(src, pdfDataRangeTransport, passwordCallback, progressCallback) {
 var task = new PDFDocumentLoadingTask();
 if (arguments.length > 1) {
  deprecated('getDocument is called with pdfDataRangeTransport, ' + 'passwordCallback or progressCallback argument');
 }
 if (pdfDataRangeTransport) {
  if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
   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') {
   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)) {
   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.disableNativeImageDecoder = params.disableNativeImageDecoder === true;
 var CMapReaderFactory = params.CMapReaderFactory || DOMCMapReaderFactory;
 if (!worker) {
  var workerPort = getDefaultSetting('workerPort');
  worker = workerPort ? new PDFWorker(null, 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;
}
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: docId,
  source: source,
  disableRange: getDefaultSetting('disableRange'),
  maxImageSize: getDefaultSetting('maxImageSize'),
  disableFontFace: getDefaultSetting('disableFontFace'),
  disableCreateObjectURL: getDefaultSetting('disableCreateObjectURL'),
  postMessageTransfers: getDefaultSetting('postMessageTransfers') && !isPostMessageTransfersDisabled,
  docBaseUrl: source.docBaseUrl,
  disableNativeImageDecoder: source.disableNativeImageDecoder
 }).then(function (workerId) {
  if (worker.destroyed) {
   throw new Error('Worker was destroyed');
  }
  return workerId;
 });
}
var PDFDocumentLoadingTask = function PDFDocumentLoadingTaskClosure() {
 var nextDocumentId = 0;
 function PDFDocumentLoadingTask() {
  this._capability = createPromiseCapability();
  this._transport = null;
  this._worker = null;
  this.docId = 'd' + nextDocumentId++;
  this.destroyed = false;
  this.onPassword = null;
  this.onProgress = null;
  this.onUnsupportedFeature = null;
 }
 PDFDocumentLoadingTask.prototype = {
  get promise() {
   return this._capability.promise;
  },
  destroy: function () {
   this.destroyed = true;
   var transportDestroyed = !this._transport ? Promise.resolve() : this._transport.destroy();
   return transportDestroyed.then(function () {
    this._transport = null;
    if (this._worker) {
     this._worker.destroy();
     this._worker = null;
    }
   }.bind(this));
  },
  then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
   return this.promise.then.apply(this.promise, arguments);
  }
 };
 return PDFDocumentLoadingTask;
}();
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 = {
  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(function () {
    var listeners = this._progressListeners;
    for (var i = 0, n = listeners.length; i < n; ++i) {
     listeners[i](loaded);
    }
   }.bind(this));
  },
  onDataProgressiveRead: function PDFDataRangeTransport_onDataProgress(chunk) {
   this._readyCapability.promise.then(function () {
    var listeners = this._progressiveReadListeners;
    for (var i = 0, n = listeners.length; i < n; ++i) {
     listeners[i](chunk);
    }
   }.bind(this));
  },
  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;
}();
var PDFDocumentProxy = function PDFDocumentProxyClosure() {
 function PDFDocumentProxy(pdfInfo, transport, loadingTask) {
  this.pdfInfo = pdfInfo;
  this.transport = transport;
  this.loadingTask = loadingTask;
 }
 PDFDocumentProxy.prototype = {
  get numPages() {
   return this.pdfInfo.numPages;
  },
  get fingerprint() {
   return this.pdfInfo.fingerprint;
  },
  getPage: function PDFDocumentProxy_getPage(pageNumber) {
   return this.transport.getPage(pageNumber);
  },
  getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
   return this.transport.getPageIndex(ref);
  },
  getDestinations: function PDFDocumentProxy_getDestinations() {
   return this.transport.getDestinations();
  },
  getDestination: function PDFDocumentProxy_getDestination(id) {
   return this.transport.getDestination(id);
  },
  getPageLabels: function PDFDocumentProxy_getPageLabels() {
   return this.transport.getPageLabels();
  },
  getAttachments: function PDFDocumentProxy_getAttachments() {
   return this.transport.getAttachments();
  },
  getJavaScript: function PDFDocumentProxy_getJavaScript() {
   return this.transport.getJavaScript();
  },
  getOutline: function PDFDocumentProxy_getOutline() {
   return this.transport.getOutline();
  },
  getMetadata: function PDFDocumentProxy_getMetadata() {
   return this.transport.getMetadata();
  },
  getData: function PDFDocumentProxy_getData() {
   return this.transport.getData();
  },
  getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() {
   return this.transport.downloadInfoCapability.promise;
  },
  getStats: function PDFDocumentProxy_getStats() {
   return this.transport.getStats();
  },
  cleanup: function PDFDocumentProxy_cleanup() {
   this.transport.startCleanup();
  },
  destroy: function PDFDocumentProxy_destroy() {
   return this.loadingTask.destroy();
  }
 };
 return PDFDocumentProxy;
}();
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 = {
  get pageNumber() {
   return this.pageIndex + 1;
  },
  get rotate() {
   return this.pageInfo.rotate;
  },
  get ref() {
   return this.pageInfo.ref;
  },
  get userUnit() {
   return this.pageInfo.userUnit;
  },
  get view() {
   return this.pageInfo.view;
  },
  getViewport: function PDFPageProxy_getViewport(scale, rotate) {
   if (arguments.length < 2) {
    rotate = this.rotate;
   }
   return new PageViewport(this.view, scale, rotate, 0, 0);
  },
  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;
  },
  render: function PDFPageProxy_render(params) {
   var stats = this.stats;
   stats.time('Overall');
   this.pendingCleanup = false;
   var renderingIntent = params.intent === 'print' ? 'print' : 'display';
   var renderInteractiveForms = params.renderInteractiveForms === true ? true : false;
   var canvasFactory = params.canvasFactory || new DOMCanvasFactory();
   if (!this.intentStates[renderingIntent]) {
    this.intentStates[renderingIntent] = Object.create(null);
   }
   var intentState = this.intentStates[renderingIntent];
   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: renderInteractiveForms
    });
   }
   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;
   if (params.continueCallback) {
    deprecated('render is used with continueCallback parameter');
    renderTask.onContinue = params.continueCallback;
   }
   var self = this;
   intentState.displayReadyCapability.promise.then(function pageDisplayReadyPromise(transparency) {
    if (self.pendingCleanup) {
     complete();
     return;
    }
    stats.time('Rendering');
    internalRenderTask.initializeGraphics(transparency);
    internalRenderTask.operatorListChanged();
   }, function pageDisplayReadPromiseError(reason) {
    complete(reason);
   });
   function complete(error) {
    var i = intentState.renderTasks.indexOf(internalRenderTask);
    if (i >= 0) {
     intentState.renderTasks.splice(i, 1);
    }
    if (self.cleanupAfterRender) {
     self.pendingCleanup = true;
    }
    self._tryCleanup();
    if (error) {
     internalRenderTask.capability.reject(error);
    } else {
     internalRenderTask.capability.resolve();
    }
    stats.timeEnd('Rendering');
    stats.timeEnd('Overall');
   }
   return renderTask;
  },
  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;
  },
  getTextContent: function PDFPageProxy_getTextContent(params) {
   return this.transport.messageHandler.sendWithPromise('GetTextContent', {
    pageIndex: this.pageNumber - 1,
    normalizeWhitespace: params && params.normalizeWhitespace === true ? true : false,
    combineTextItems: params && params.disableCombineTextItems === true ? false : true
   });
  },
  _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') {
     return;
    }
    var intentState = this.intentStates[intent];
    intentState.renderTasks.forEach(function (renderTask) {
     var renderCompleted = renderTask.capability.promise.catch(function () {
     });
     waitOn.push(renderCompleted);
     renderTask.cancel();
    });
   }, this);
   this.objs.clear();
   this.annotationsPromise = null;
   this.pendingCleanup = false;
   return Promise.all(waitOn);
  },
  destroy: function () {
   deprecated('page destroy method, use cleanup() instead');
   this.cleanup();
  },
  cleanup: function PDFPageProxy_cleanup() {
   this.pendingCleanup = true;
   this._tryCleanup();
  },
  _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;
  },
  _startRenderPage: function PDFPageProxy_startRenderPage(transparency, intent) {
   var intentState = this.intentStates[intent];
   if (intentState.displayReadyCapability) {
    intentState.displayReadyCapability.resolve(transparency);
   }
  },
  _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk, intent) {
   var intentState = this.intentStates[intent];
   var i, ii;
   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;
   for (i = 0; i < intentState.renderTasks.length; i++) {
    intentState.renderTasks[i].operatorListChanged();
   }
   if (operatorListChunk.lastChunk) {
    intentState.receivingOperatorList = false;
    this._tryCleanup();
   }
  }
 };
 return PDFPageProxy;
}();
var PDFWorker = function PDFWorkerClosure() {
 var nextFakeWorkerId = 0;
 function getWorkerSrc() {
  if (typeof workerSrc !== 'undefined') {
   return workerSrc;
  }
  if (getDefaultSetting('workerSrc')) {
   return getDefaultSetting('workerSrc');
  }
  if (pdfjsFilePath) {
   return pdfjsFilePath.replace(/\.js$/i, '.worker.js');
  }
  error('No PDFJS.workerSrc specified');
 }
 var fakeWorkerFilesLoadedCapability;
 function setupFakeWorkerGlobal() {
  var WorkerMessageHandler;
  if (fakeWorkerFilesLoadedCapability) {
   return fakeWorkerFilesLoadedCapability.promise;
  }
  fakeWorkerFilesLoadedCapability = createPromiseCapability();
  var loader = fakeWorkerFilesLoader || function (callback) {
   Util.loadScript(getWorkerSrc(), function () {
    callback(window.pdfjsDistBuildPdfWorker.WorkerMessageHandler);
   });
  };
  loader(fakeWorkerFilesLoadedCapability.resolve);
  return fakeWorkerFilesLoadedCapability.promise;
 }
 function FakeWorkerPort(defer) {
  this._listeners = [];
  this._defer = defer;
  this._deferred = Promise.resolve(undefined);
 }
 FakeWorkerPort.prototype = {
  postMessage: function (obj, transfers) {
   function cloneValue(value) {
    if (typeof value !== 'object' || value === null) {
     return value;
    }
    if (cloned.has(value)) {
     return cloned.get(value);
    }
    var result;
    var buffer;
    if ((buffer = value.buffer) && isArrayBuffer(buffer)) {
     var transferable = transfers && transfers.indexOf(buffer) >= 0;
     if (value === buffer) {
      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);
    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(function () {
    this._listeners.forEach(function (listener) {
     listener.call(this, e);
    }, this);
   }.bind(this));
  },
  addEventListener: function (name, listener) {
   this._listeners.push(listener);
  },
  removeEventListener: function (name, listener) {
   var i = this._listeners.indexOf(listener);
   this._listeners.splice(i, 1);
  },
  terminate: function () {
   this._listeners = [];
  }
 };
 function createCDNWrapper(url) {
  var wrapper = 'importScripts(\'' + url + '\');';
  return URL.createObjectURL(new Blob([wrapper]));
 }
 function PDFWorker(name, port) {
  this.name = name;
  this.destroyed = false;
  this._readyCapability = createPromiseCapability();
  this._port = null;
  this._webWorker = null;
  this._messageHandler = null;
  if (port) {
   this._initializeFromPort(port);
   return;
  }
  this._initialize();
 }
 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 () {
   });
   this._readyCapability.resolve();
  },
  _initialize: function PDFWorker_initialize() {
   if (!isWorkerDisabled && !getDefaultSetting('disableWorker') && typeof Worker !== 'undefined') {
    var workerSrc = getWorkerSrc();
    try {
     if (!isSameOrigin(window.location.href, workerSrc)) {
      workerSrc = createCDNWrapper(new URL(workerSrc, window.location).href);
     }
     var worker = new Worker(workerSrc);
     var messageHandler = new MessageHandler('main', 'worker', worker);
     var terminateEarly = function () {
      worker.removeEventListener('error', onWorkerError);
      messageHandler.destroy();
      worker.terminate();
      if (this.destroyed) {
       this._readyCapability.reject(new Error('Worker was destroyed'));
      } else {
       this._setupFakeWorker();
      }
     }.bind(this);
     var onWorkerError = function (event) {
      if (!this._webWorker) {
       terminateEarly();
      }
     }.bind(this);
     worker.addEventListener('error', onWorkerError);
     messageHandler.on('test', function PDFWorker_test(data) {
      worker.removeEventListener('error', onWorkerError);
      if (this.destroyed) {
       terminateEarly();
       return;
      }
      var supportTypedArray = data && data.supportTypedArray;
      if (supportTypedArray) {
       this._messageHandler = messageHandler;
       this._port = worker;
       this._webWorker = worker;
       if (!data.supportTransfers) {
        isPostMessageTransfersDisabled = true;
       }
       this._readyCapability.resolve();
       messageHandler.send('configure', { verbosity: getVerbosityLevel() });
      } else {
       this._setupFakeWorker();
       messageHandler.destroy();
       worker.terminate();
      }
     }.bind(this));
     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', function (data) {
      worker.removeEventListener('error', onWorkerError);
      if (this.destroyed) {
       terminateEarly();
       return;
      }
      try {
       sendTest();
      } catch (e) {
       this._setupFakeWorker();
      }
     }.bind(this));
     var sendTest = function () {
      var postMessageTransfers = getDefaultSetting('postMessageTransfers') && !isPostMessageTransfersDisabled;
      var testObj = new Uint8Array([postMessageTransfers ? 255 : 0]);
      try {
       messageHandler.send('test', testObj, [testObj.buffer]);
      } catch (ex) {
       info('Cannot use postMessage transfers');
       testObj[0] = 0;
       messageHandler.send('test', testObj);
      }
     };
     sendTest();
     return;
    } catch (e) {
     info('The worker has been disabled.');
    }
   }
   this._setupFakeWorker();
  },
  _setupFakeWorker: function PDFWorker_setupFakeWorker() {
   if (!isWorkerDisabled && !getDefaultSetting('disableWorker')) {
    warn('Setting up fake worker.');
    isWorkerDisabled = true;
   }
   setupFakeWorkerGlobal().then(function (WorkerMessageHandler) {
    if (this.destroyed) {
     this._readyCapability.reject(new Error('Worker was destroyed'));
     return;
    }
    var isTypedArraysPresent = Uint8Array !== Float32Array;
    var port = new FakeWorkerPort(isTypedArraysPresent);
    this._port = port;
    var id = 'fake' + nextFakeWorkerId++;
    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();
   }.bind(this));
  },
  destroy: function PDFWorker_destroy() {
   this.destroyed = true;
   if (this._webWorker) {
    this._webWorker.terminate();
    this._webWorker = null;
   }
   this._port = null;
   if (this._messageHandler) {
    this._messageHandler.destroy();
    this._messageHandler = null;
   }
  }
 };
 return PDFWorker;
}();
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 = [];
   this.pageCache.forEach(function (page) {
    if (page) {
     waitOn.push(page._destroy());
    }
   });
   this.pageCache = [];
   this.pagePromises = [];
   var self = this;
   var terminated = this.messageHandler.sendWithPromise('Terminate', null);
   waitOn.push(terminated);
   Promise.all(waitOn).then(function () {
    self.fontLoader.clear();
    if (self.pdfDataRangeTransport) {
     self.pdfDataRangeTransport.abort();
     self.pdfDataRangeTransport = null;
    }
    if (self.messageHandler) {
     self.messageHandler.destroy();
     self.messageHandler = null;
    }
    self.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: begin,
      chunk: chunk
     });
    });
    pdfDataRangeTransport.addProgressListener(function (loaded) {
     messageHandler.send('OnDataProgress', { loaded: loaded });
    });
    pdfDataRangeTransport.addProgressiveReadListener(function (chunk) {
     messageHandler.send('OnDataRange', { chunk: 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 = function (password) {
      this._passwordCapability.resolve({ password: password });
     }.bind(this);
     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;
    }
    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;
    }
    var page = this.pageCache[data.pageIndex];
    page._renderPageChunk(data.operatorList, data.intent);
   }, this);
   messageHandler.on('commonobj', function transportObj(data) {
    if (this.destroyed) {
     return;
    }
    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: function (font, url) {
        globalScope['FontInspector'].fontAdded(font, url);
       }
      };
     }
     var font = new FontFaceObject(exportedData, {
      isEvalSuported: getDefaultSetting('isEvalSupported'),
      disableFontFace: getDefaultSetting('disableFontFace'),
      fontRegistry: fontRegistry
     });
     this.fontLoader.bind([font], function fontReady(fontObjs) {
      this.commonObjs.resolve(id, font);
     }.bind(this));
     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;
    }
    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);
     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;
    }
    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;
    }
    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) {
     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;
    }
    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') {
     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: width,
       height: 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: pageIndex }).then(function (pageInfo) {
    if (this.destroyed) {
     throw new Error('Transport destroyed');
    }
    var page = new PDFPageProxy(pageIndex, pageInfo, this);
    this.pageCache[pageIndex] = page;
    return page;
   }.bind(this));
   this.pagePromises[pageIndex] = promise;
   return promise;
  },
  getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
   return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref }).catch(function (reason) {
    return Promise.reject(new Error(reason));
   });
  },
  getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) {
   return this.messageHandler.sendWithPromise('GetAnnotations', {
    pageIndex: pageIndex,
    intent: intent
   });
  },
  getDestinations: function WorkerTransport_getDestinations() {
   return this.messageHandler.sendWithPromise('GetDestinations', null);
  },
  getDestination: function WorkerTransport_getDestination(id) {
   return this.messageHandler.sendWithPromise('GetDestination', { id: 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(function endCleanup() {
    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();
   }.bind(this));
  }
 };
 return WorkerTransport;
}();
var PDFObjects = function PDFObjectsClosure() {
 function PDFObjects() {
  this.objs = Object.create(null);
 }
 PDFObjects.prototype = {
  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;
  },
  get: function PDFObjects_get(objId, callback) {
   if (callback) {
    this.ensureObj(objId).capability.promise.then(callback);
    return null;
   }
   var obj = this.objs[objId];
   if (!obj || !obj.resolved) {
    error('Requesting object that isn\'t resolved yet ' + objId);
   }
   return obj.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);
  },
  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;
}();
var RenderTask = function RenderTaskClosure() {
 function RenderTask(internalRenderTask) {
  this._internalRenderTask = internalRenderTask;
  this.onContinue = null;
 }
 RenderTask.prototype = {
  get promise() {
   return this._internalRenderTask.capability.promise;
  },
  cancel: function RenderTask_cancel() {
   this._internalRenderTask.cancel();
  },
  then: function RenderTask_then(onFulfilled, onRejected) {
   return this.promise.then.apply(this.promise, arguments);
  }
 };
 return RenderTask;
}();
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);
  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(params.transform, params.viewport, transparency);
   this.operatorListIdx = 0;
   this.graphicsReady = true;
   if (this.graphicsReadyCallback) {
    this.graphicsReadyCallback();
   }
  },
  cancel: function InternalRenderTask_cancel() {
   this.running = false;
   this.cancelled = true;
   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;
}();
var _UnsupportedManager = function UnsupportedManagerClosure() {
 var listeners = [];
 return {
  listen: function (cb) {
   deprecated('Global UnsupportedManager.listen is used: ' + ' use PDFDocumentLoadingTask.onUnsupportedFeature instead');
   listeners.push(cb);
  },
  notify: function (featureId) {
   for (var i = 0, ii = listeners.length; i < ii; i++) {
    listeners[i](featureId);
   }
  }
 };
}();
exports.version = '1.7.344';
exports.build = 'c2905614';
exports.getDocument = getDocument;
exports.PDFDataRangeTransport = PDFDataRangeTransport;
exports.PDFWorker = PDFWorker;
exports.PDFDocumentProxy = PDFDocumentProxy;
exports.PDFPageProxy = PDFPageProxy;
exports._UnsupportedManager = _UnsupportedManager;