pdfjs-dist/lib/display/api.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2019 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.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getDocument = getDocument;
exports.setPDFNetworkStreamFactory = setPDFNetworkStreamFactory;
exports.build = exports.version = exports.PDFPageProxy = exports.PDFDocumentProxy = exports.PDFWorker = exports.PDFDataRangeTransport = exports.LoopbackPort = void 0;

var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator"));

var _util = require("../shared/util");

var _display_utils = require("./display_utils");

var _font_loader = require("./font_loader");

var _api_compatibility = require("./api_compatibility");

var _canvas = require("./canvas");

var _global_scope = _interopRequireDefault(require("../shared/global_scope"));

var _worker_options = require("./worker_options");

var _message_handler = require("../shared/message_handler");

var _metadata = require("./metadata");

var _transport_stream = require("./transport_stream");

var _webgl = require("./webgl");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }

function _iterableToArrayLimit(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); }

function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance"); }

function _iterableToArray(iter) { if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter); }

function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

var DEFAULT_RANGE_CHUNK_SIZE = 65536;
var isWorkerDisabled = false;
var fallbackWorkerSrc;
var fakeWorkerFilesLoader = null;
{
  var useRequireEnsure = false;

  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) {
    fallbackWorkerSrc = requirejs.toUrl('pdfjs-dist/build/pdf.worker.js');
  }

  var dynamicLoaderSupported = typeof requirejs !== 'undefined' && requirejs.load;
  fakeWorkerFilesLoader = useRequireEnsure ? function () {
    return new Promise(function (resolve, reject) {
      require.ensure([], function () {
        try {
          var worker;
          worker = require('../pdf.worker.js');
          resolve(worker.WorkerMessageHandler);
        } catch (ex) {
          reject(ex);
        }
      }, reject, 'pdfjsWorker');
    });
  } : dynamicLoaderSupported ? function () {
    return new Promise(function (resolve, reject) {
      requirejs(['pdfjs-dist/build/pdf.worker'], function (worker) {
        try {
          resolve(worker.WorkerMessageHandler);
        } catch (ex) {
          reject(ex);
        }
      }, reject);
    });
  } : null;

  if (!fallbackWorkerSrc && (typeof document === "undefined" ? "undefined" : _typeof(document)) === 'object' && 'currentScript' in document) {
    var pdfjsFilePath = document.currentScript && document.currentScript.src;

    if (pdfjsFilePath) {
      fallbackWorkerSrc = pdfjsFilePath.replace(/(\.(?:min\.)?js)(\?.*)?$/i, '.worker$1$2');
    }
  }
}
var createPDFNetworkStream;

function setPDFNetworkStreamFactory(pdfNetworkStreamFactory) {
  createPDFNetworkStream = pdfNetworkStreamFactory;
}

function getDocument(src) {
  var task = new PDFDocumentLoadingTask();
  var source;

  if (typeof src === 'string') {
    source = {
      url: src
    };
  } else if ((0, _util.isArrayBuffer)(src)) {
    source = {
      data: src
    };
  } else if (src instanceof PDFDataRangeTransport) {
    source = {
      range: src
    };
  } else {
    if (_typeof(src) !== 'object') {
      throw new Error('Invalid parameter in getDocument, ' + 'need either Uint8Array, string or a parameter object');
    }

    if (!src.url && !src.data && !src.range) {
      throw new Error('Invalid parameter object: need either .data, .range or .url');
    }

    source = src;
  }

  var params = Object.create(null);
  var rangeTransport = null,
      worker = null;

  for (var key in source) {
    if (key === 'url' && typeof window !== 'undefined') {
      params[key] = new _util.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] = (0, _util.stringToBytes)(pdfBytes);
      } else if (_typeof(pdfBytes) === 'object' && pdfBytes !== null && !isNaN(pdfBytes.length)) {
        params[key] = new Uint8Array(pdfBytes);
      } else if ((0, _util.isArrayBuffer)(pdfBytes)) {
        params[key] = new Uint8Array(pdfBytes);
      } else {
        throw new 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.CMapReaderFactory = params.CMapReaderFactory || _display_utils.DOMCMapReaderFactory;
  params.ignoreErrors = params.stopAtErrors !== true;
  params.pdfBug = params.pdfBug === true;
  var NativeImageDecoderValues = Object.values(_util.NativeImageDecoding);

  if (params.nativeImageDecoderSupport === undefined || !NativeImageDecoderValues.includes(params.nativeImageDecoderSupport)) {
    params.nativeImageDecoderSupport = _api_compatibility.apiCompatibilityParams.nativeImageDecoderSupport || _util.NativeImageDecoding.DECODE;
  }

  if (!Number.isInteger(params.maxImageSize)) {
    params.maxImageSize = -1;
  }

  if (typeof params.isEvalSupported !== 'boolean') {
    params.isEvalSupported = true;
  }

  if (typeof params.disableFontFace !== 'boolean') {
    params.disableFontFace = _api_compatibility.apiCompatibilityParams.disableFontFace || false;
  }

  if (typeof params.disableRange !== 'boolean') {
    params.disableRange = false;
  }

  if (typeof params.disableStream !== 'boolean') {
    params.disableStream = false;
  }

  if (typeof params.disableAutoFetch !== 'boolean') {
    params.disableAutoFetch = false;
  }

  if (typeof params.disableCreateObjectURL !== 'boolean') {
    params.disableCreateObjectURL = _api_compatibility.apiCompatibilityParams.disableCreateObjectURL || false;
  }

  (0, _util.setVerbosityLevel)(params.verbosity);

  if (!worker) {
    var workerParams = {
      postMessageTransfers: params.postMessageTransfers,
      verbosity: params.verbosity,
      port: _worker_options.GlobalWorkerOptions.workerPort
    };
    worker = workerParams.port ? PDFWorker.fromPort(workerParams) : new PDFWorker(workerParams);
    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 networkStream;

      if (rangeTransport) {
        networkStream = new _transport_stream.PDFDataTransportStream({
          length: params.length,
          initialData: params.initialData,
          progressiveDone: params.progressiveDone,
          disableRange: params.disableRange,
          disableStream: params.disableStream
        }, rangeTransport);
      } else if (!params.data) {
        networkStream = createPDFNetworkStream({
          url: params.url,
          length: params.length,
          httpHeaders: params.httpHeaders,
          withCredentials: params.withCredentials,
          rangeChunkSize: params.rangeChunkSize,
          disableRange: params.disableRange,
          disableStream: params.disableStream
        });
      }

      var messageHandler = new _message_handler.MessageHandler(docId, workerId, worker.port);
      messageHandler.postMessageTransfers = worker.postMessageTransfers;
      var transport = new WorkerTransport(messageHandler, task, networkStream, params);
      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'));
  }

  if (pdfDataRangeTransport) {
    source.length = pdfDataRangeTransport.length;
    source.initialData = pdfDataRangeTransport.initialData;
    source.progressiveDone = pdfDataRangeTransport.progressiveDone;
  }

  return worker.messageHandler.sendWithPromise('GetDocRequest', {
    docId: docId,
    apiVersion: '2.2.228',
    source: {
      data: source.data,
      url: source.url,
      password: source.password,
      disableAutoFetch: source.disableAutoFetch,
      rangeChunkSize: source.rangeChunkSize,
      length: source.length
    },
    maxImageSize: source.maxImageSize,
    disableFontFace: source.disableFontFace,
    disableCreateObjectURL: source.disableCreateObjectURL,
    postMessageTransfers: worker.postMessageTransfers,
    docBaseUrl: source.docBaseUrl,
    nativeImageDecoderSupport: source.nativeImageDecoderSupport,
    ignoreErrors: source.ignoreErrors,
    isEvalSupported: source.isEvalSupported
  }).then(function (workerId) {
    if (worker.destroyed) {
      throw new Error('Worker was destroyed');
    }

    return workerId;
  });
}

var PDFDocumentLoadingTask = function PDFDocumentLoadingTaskClosure() {
  var nextDocumentId = 0;

  var PDFDocumentLoadingTask =
  /*#__PURE__*/
  function () {
    function PDFDocumentLoadingTask() {
      _classCallCheck(this, PDFDocumentLoadingTask);

      this._capability = (0, _util.createPromiseCapability)();
      this._transport = null;
      this._worker = null;
      this.docId = 'd' + nextDocumentId++;
      this.destroyed = false;
      this.onPassword = null;
      this.onProgress = null;
      this.onUnsupportedFeature = null;
    }

    _createClass(PDFDocumentLoadingTask, [{
      key: "destroy",
      value: function destroy() {
        var _this = this;

        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;
          }
        });
      }
    }, {
      key: "then",
      value: function then(onFulfilled, onRejected) {
        (0, _display_utils.deprecated)('PDFDocumentLoadingTask.then method, ' + 'use the `promise` getter instead.');
        return this.promise.then.apply(this.promise, arguments);
      }
    }, {
      key: "promise",
      get: function get() {
        return this._capability.promise;
      }
    }]);

    return PDFDocumentLoadingTask;
  }();

  return PDFDocumentLoadingTask;
}();

var PDFDataRangeTransport =
/*#__PURE__*/
function () {
  function PDFDataRangeTransport(length, initialData) {
    var progressiveDone = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;

    _classCallCheck(this, PDFDataRangeTransport);

    this.length = length;
    this.initialData = initialData;
    this.progressiveDone = progressiveDone;
    this._rangeListeners = [];
    this._progressListeners = [];
    this._progressiveReadListeners = [];
    this._progressiveDoneListeners = [];
    this._readyCapability = (0, _util.createPromiseCapability)();
  }

  _createClass(PDFDataRangeTransport, [{
    key: "addRangeListener",
    value: function addRangeListener(listener) {
      this._rangeListeners.push(listener);
    }
  }, {
    key: "addProgressListener",
    value: function addProgressListener(listener) {
      this._progressListeners.push(listener);
    }
  }, {
    key: "addProgressiveReadListener",
    value: function addProgressiveReadListener(listener) {
      this._progressiveReadListeners.push(listener);
    }
  }, {
    key: "addProgressiveDoneListener",
    value: function addProgressiveDoneListener(listener) {
      this._progressiveDoneListeners.push(listener);
    }
  }, {
    key: "onDataRange",
    value: function onDataRange(begin, chunk) {
      var _iteratorNormalCompletion = true;
      var _didIteratorError = false;
      var _iteratorError = undefined;

      try {
        for (var _iterator = this._rangeListeners[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
          var listener = _step.value;
          listener(begin, chunk);
        }
      } catch (err) {
        _didIteratorError = true;
        _iteratorError = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion && _iterator["return"] != null) {
            _iterator["return"]();
          }
        } finally {
          if (_didIteratorError) {
            throw _iteratorError;
          }
        }
      }
    }
  }, {
    key: "onDataProgress",
    value: function onDataProgress(loaded, total) {
      var _this2 = this;

      this._readyCapability.promise.then(function () {
        var _iteratorNormalCompletion2 = true;
        var _didIteratorError2 = false;
        var _iteratorError2 = undefined;

        try {
          for (var _iterator2 = _this2._progressListeners[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
            var listener = _step2.value;
            listener(loaded, total);
          }
        } catch (err) {
          _didIteratorError2 = true;
          _iteratorError2 = err;
        } finally {
          try {
            if (!_iteratorNormalCompletion2 && _iterator2["return"] != null) {
              _iterator2["return"]();
            }
          } finally {
            if (_didIteratorError2) {
              throw _iteratorError2;
            }
          }
        }
      });
    }
  }, {
    key: "onDataProgressiveRead",
    value: function onDataProgressiveRead(chunk) {
      var _this3 = this;

      this._readyCapability.promise.then(function () {
        var _iteratorNormalCompletion3 = true;
        var _didIteratorError3 = false;
        var _iteratorError3 = undefined;

        try {
          for (var _iterator3 = _this3._progressiveReadListeners[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
            var listener = _step3.value;
            listener(chunk);
          }
        } catch (err) {
          _didIteratorError3 = true;
          _iteratorError3 = err;
        } finally {
          try {
            if (!_iteratorNormalCompletion3 && _iterator3["return"] != null) {
              _iterator3["return"]();
            }
          } finally {
            if (_didIteratorError3) {
              throw _iteratorError3;
            }
          }
        }
      });
    }
  }, {
    key: "onDataProgressiveDone",
    value: function onDataProgressiveDone() {
      var _this4 = this;

      this._readyCapability.promise.then(function () {
        var _iteratorNormalCompletion4 = true;
        var _didIteratorError4 = false;
        var _iteratorError4 = undefined;

        try {
          for (var _iterator4 = _this4._progressiveDoneListeners[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
            var listener = _step4.value;
            listener();
          }
        } catch (err) {
          _didIteratorError4 = true;
          _iteratorError4 = err;
        } finally {
          try {
            if (!_iteratorNormalCompletion4 && _iterator4["return"] != null) {
              _iterator4["return"]();
            }
          } finally {
            if (_didIteratorError4) {
              throw _iteratorError4;
            }
          }
        }
      });
    }
  }, {
    key: "transportReady",
    value: function transportReady() {
      this._readyCapability.resolve();
    }
  }, {
    key: "requestDataRange",
    value: function requestDataRange(begin, end) {
      (0, _util.unreachable)('Abstract method PDFDataRangeTransport.requestDataRange');
    }
  }, {
    key: "abort",
    value: function abort() {}
  }]);

  return PDFDataRangeTransport;
}();

exports.PDFDataRangeTransport = PDFDataRangeTransport;

var PDFDocumentProxy =
/*#__PURE__*/
function () {
  function PDFDocumentProxy(pdfInfo, transport) {
    _classCallCheck(this, PDFDocumentProxy);

    this._pdfInfo = pdfInfo;
    this._transport = transport;
  }

  _createClass(PDFDocumentProxy, [{
    key: "getPage",
    value: function getPage(pageNumber) {
      return this._transport.getPage(pageNumber);
    }
  }, {
    key: "getPageIndex",
    value: function getPageIndex(ref) {
      return this._transport.getPageIndex(ref);
    }
  }, {
    key: "getDestinations",
    value: function getDestinations() {
      return this._transport.getDestinations();
    }
  }, {
    key: "getDestination",
    value: function getDestination(id) {
      return this._transport.getDestination(id);
    }
  }, {
    key: "getPageLabels",
    value: function getPageLabels() {
      return this._transport.getPageLabels();
    }
  }, {
    key: "getPageLayout",
    value: function getPageLayout() {
      return this._transport.getPageLayout();
    }
  }, {
    key: "getPageMode",
    value: function getPageMode() {
      return this._transport.getPageMode();
    }
  }, {
    key: "getViewerPreferences",
    value: function getViewerPreferences() {
      return this._transport.getViewerPreferences();
    }
  }, {
    key: "getOpenActionDestination",
    value: function getOpenActionDestination() {
      return this._transport.getOpenActionDestination();
    }
  }, {
    key: "getAttachments",
    value: function getAttachments() {
      return this._transport.getAttachments();
    }
  }, {
    key: "getJavaScript",
    value: function getJavaScript() {
      return this._transport.getJavaScript();
    }
  }, {
    key: "getOutline",
    value: function getOutline() {
      return this._transport.getOutline();
    }
  }, {
    key: "getPermissions",
    value: function getPermissions() {
      return this._transport.getPermissions();
    }
  }, {
    key: "getMetadata",
    value: function getMetadata() {
      return this._transport.getMetadata();
    }
  }, {
    key: "getData",
    value: function getData() {
      return this._transport.getData();
    }
  }, {
    key: "getDownloadInfo",
    value: function getDownloadInfo() {
      return this._transport.downloadInfoCapability.promise;
    }
  }, {
    key: "getStats",
    value: function getStats() {
      return this._transport.getStats();
    }
  }, {
    key: "cleanup",
    value: function cleanup() {
      this._transport.startCleanup();
    }
  }, {
    key: "destroy",
    value: function destroy() {
      return this.loadingTask.destroy();
    }
  }, {
    key: "numPages",
    get: function get() {
      return this._pdfInfo.numPages;
    }
  }, {
    key: "fingerprint",
    get: function get() {
      return this._pdfInfo.fingerprint;
    }
  }, {
    key: "loadingParams",
    get: function get() {
      return this._transport.loadingParams;
    }
  }, {
    key: "loadingTask",
    get: function get() {
      return this._transport.loadingTask;
    }
  }]);

  return PDFDocumentProxy;
}();

exports.PDFDocumentProxy = PDFDocumentProxy;

var PDFPageProxy =
/*#__PURE__*/
function () {
  function PDFPageProxy(pageIndex, pageInfo, transport) {
    var pdfBug = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;

    _classCallCheck(this, PDFPageProxy);

    this.pageIndex = pageIndex;
    this._pageInfo = pageInfo;
    this._transport = transport;
    this._stats = pdfBug ? new _display_utils.StatTimer() : _display_utils.DummyStatTimer;
    this._pdfBug = pdfBug;
    this.commonObjs = transport.commonObjs;
    this.objs = new PDFObjects();
    this.cleanupAfterRender = false;
    this.pendingCleanup = false;
    this.intentStates = Object.create(null);
    this.destroyed = false;
  }

  _createClass(PDFPageProxy, [{
    key: "getViewport",
    value: function getViewport() {
      var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
          scale = _ref.scale,
          _ref$rotation = _ref.rotation,
          rotation = _ref$rotation === void 0 ? this.rotate : _ref$rotation,
          _ref$dontFlip = _ref.dontFlip,
          dontFlip = _ref$dontFlip === void 0 ? false : _ref$dontFlip;

      if (arguments.length > 1 || typeof arguments[0] === 'number') {
        (0, _display_utils.deprecated)('getViewport is called with obsolete arguments.');
        scale = arguments[0];
        rotation = typeof arguments[1] === 'number' ? arguments[1] : this.rotate;
        dontFlip = typeof arguments[2] === 'boolean' ? arguments[2] : false;
      }

      return new _display_utils.PageViewport({
        viewBox: this.view,
        scale: scale,
        rotation: rotation,
        dontFlip: dontFlip
      });
    }
  }, {
    key: "getAnnotations",
    value: function getAnnotations() {
      var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
          _ref2$intent = _ref2.intent,
          intent = _ref2$intent === void 0 ? null : _ref2$intent;

      if (!this.annotationsPromise || this.annotationsIntent !== intent) {
        this.annotationsPromise = this._transport.getAnnotations(this.pageIndex, intent);
        this.annotationsIntent = intent;
      }

      return this.annotationsPromise;
    }
  }, {
    key: "render",
    value: function render(_ref3) {
      var _this5 = this;

      var canvasContext = _ref3.canvasContext,
          viewport = _ref3.viewport,
          _ref3$intent = _ref3.intent,
          intent = _ref3$intent === void 0 ? 'display' : _ref3$intent,
          _ref3$enableWebGL = _ref3.enableWebGL,
          enableWebGL = _ref3$enableWebGL === void 0 ? false : _ref3$enableWebGL,
          _ref3$renderInteracti = _ref3.renderInteractiveForms,
          renderInteractiveForms = _ref3$renderInteracti === void 0 ? false : _ref3$renderInteracti,
          _ref3$transform = _ref3.transform,
          transform = _ref3$transform === void 0 ? null : _ref3$transform,
          _ref3$imageLayer = _ref3.imageLayer,
          imageLayer = _ref3$imageLayer === void 0 ? null : _ref3$imageLayer,
          _ref3$canvasFactory = _ref3.canvasFactory,
          canvasFactory = _ref3$canvasFactory === void 0 ? null : _ref3$canvasFactory,
          _ref3$background = _ref3.background,
          background = _ref3$background === void 0 ? null : _ref3$background;
      var stats = this._stats;
      stats.time('Overall');
      this.pendingCleanup = false;
      var renderingIntent = intent === 'print' ? 'print' : 'display';
      var canvasFactoryInstance = canvasFactory || new _display_utils.DOMCanvasFactory();
      var webGLContext = new _webgl.WebGLContext({
        enable: enableWebGL
      });

      if (!this.intentStates[renderingIntent]) {
        this.intentStates[renderingIntent] = Object.create(null);
      }

      var intentState = this.intentStates[renderingIntent];

      if (!intentState.displayReadyCapability) {
        intentState.receivingOperatorList = true;
        intentState.displayReadyCapability = (0, _util.createPromiseCapability)();
        intentState.operatorList = {
          fnArray: [],
          argsArray: [],
          lastChunk: false
        };
        stats.time('Page Request');

        this._transport.messageHandler.send('RenderPageRequest', {
          pageIndex: this.pageNumber - 1,
          intent: renderingIntent,
          renderInteractiveForms: renderInteractiveForms === true
        });
      }

      var complete = function complete(error) {
        var i = intentState.renderTasks.indexOf(internalRenderTask);

        if (i >= 0) {
          intentState.renderTasks.splice(i, 1);
        }

        if (_this5.cleanupAfterRender || renderingIntent === 'print') {
          _this5.pendingCleanup = true;
        }

        _this5._tryCleanup();

        if (error) {
          internalRenderTask.capability.reject(error);
        } else {
          internalRenderTask.capability.resolve();
        }

        stats.timeEnd('Rendering');
        stats.timeEnd('Overall');
      };

      var internalRenderTask = new InternalRenderTask({
        callback: complete,
        params: {
          canvasContext: canvasContext,
          viewport: viewport,
          transform: transform,
          imageLayer: imageLayer,
          background: background
        },
        objs: this.objs,
        commonObjs: this.commonObjs,
        operatorList: intentState.operatorList,
        pageNumber: this.pageNumber,
        canvasFactory: canvasFactoryInstance,
        webGLContext: webGLContext,
        useRequestAnimationFrame: renderingIntent !== 'print',
        pdfBug: this._pdfBug
      });

      if (!intentState.renderTasks) {
        intentState.renderTasks = [];
      }

      intentState.renderTasks.push(internalRenderTask);
      var renderTask = internalRenderTask.task;
      intentState.displayReadyCapability.promise.then(function (transparency) {
        if (_this5.pendingCleanup) {
          complete();
          return;
        }

        stats.time('Rendering');
        internalRenderTask.initializeGraphics(transparency);
        internalRenderTask.operatorListChanged();
      })["catch"](complete);
      return renderTask;
    }
  }, {
    key: "getOperatorList",
    value: function 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 = (0, _util.createPromiseCapability)();
        intentState.renderTasks = [];
        intentState.renderTasks.push(opListTask);
        intentState.operatorList = {
          fnArray: [],
          argsArray: [],
          lastChunk: false
        };

        this._stats.time('Page Request');

        this._transport.messageHandler.send('RenderPageRequest', {
          pageIndex: this.pageIndex,
          intent: renderingIntent
        });
      }

      return intentState.opListReadCapability.promise;
    }
  }, {
    key: "streamTextContent",
    value: function streamTextContent() {
      var _ref4 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
          _ref4$normalizeWhites = _ref4.normalizeWhitespace,
          normalizeWhitespace = _ref4$normalizeWhites === void 0 ? false : _ref4$normalizeWhites,
          _ref4$disableCombineT = _ref4.disableCombineTextItems,
          disableCombineTextItems = _ref4$disableCombineT === void 0 ? false : _ref4$disableCombineT;

      var TEXT_CONTENT_CHUNK_SIZE = 100;
      return this._transport.messageHandler.sendWithStream('GetTextContent', {
        pageIndex: this.pageNumber - 1,
        normalizeWhitespace: normalizeWhitespace === true,
        combineTextItems: disableCombineTextItems !== true
      }, {
        highWaterMark: TEXT_CONTENT_CHUNK_SIZE,
        size: function size(textContent) {
          return textContent.items.length;
        }
      });
    }
  }, {
    key: "getTextContent",
    value: function getTextContent() {
      var params = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      var readableStream = this.streamTextContent(params);
      return new Promise(function (resolve, reject) {
        function pump() {
          reader.read().then(function (_ref5) {
            var _textContent$items;

            var value = _ref5.value,
                done = _ref5.done;

            if (done) {
              resolve(textContent);
              return;
            }

            Object.assign(textContent.styles, value.styles);

            (_textContent$items = textContent.items).push.apply(_textContent$items, _toConsumableArray(value.items));

            pump();
          }, reject);
        }

        var reader = readableStream.getReader();
        var textContent = {
          items: [],
          styles: Object.create(null)
        };
        pump();
      });
    }
  }, {
    key: "_destroy",
    value: function _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);
    }
  }, {
    key: "cleanup",
    value: function cleanup() {
      var resetStats = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
      this.pendingCleanup = true;

      this._tryCleanup(resetStats);
    }
  }, {
    key: "_tryCleanup",
    value: function _tryCleanup() {
      var resetStats = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

      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;

      if (resetStats && this._stats instanceof _display_utils.StatTimer) {
        this._stats = new _display_utils.StatTimer();
      }

      this.pendingCleanup = false;
    }
  }, {
    key: "_startRenderPage",
    value: function _startRenderPage(transparency, intent) {
      var intentState = this.intentStates[intent];

      if (intentState.displayReadyCapability) {
        intentState.displayReadyCapability.resolve(transparency);
      }
    }
  }, {
    key: "_renderPageChunk",
    value: function _renderPageChunk(operatorListChunk, intent) {
      var intentState = this.intentStates[intent];

      for (var 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 (var _i = 0; _i < intentState.renderTasks.length; _i++) {
        intentState.renderTasks[_i].operatorListChanged();
      }

      if (operatorListChunk.lastChunk) {
        intentState.receivingOperatorList = false;

        this._tryCleanup();
      }
    }
  }, {
    key: "pageNumber",
    get: function get() {
      return this.pageIndex + 1;
    }
  }, {
    key: "rotate",
    get: function get() {
      return this._pageInfo.rotate;
    }
  }, {
    key: "ref",
    get: function get() {
      return this._pageInfo.ref;
    }
  }, {
    key: "userUnit",
    get: function get() {
      return this._pageInfo.userUnit;
    }
  }, {
    key: "view",
    get: function get() {
      return this._pageInfo.view;
    }
  }, {
    key: "stats",
    get: function get() {
      return this._stats instanceof _display_utils.StatTimer ? this._stats : null;
    }
  }]);

  return PDFPageProxy;
}();

exports.PDFPageProxy = PDFPageProxy;

var LoopbackPort =
/*#__PURE__*/
function () {
  function LoopbackPort() {
    var defer = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : true;

    _classCallCheck(this, LoopbackPort);

    this._listeners = [];
    this._defer = defer;
    this._deferred = Promise.resolve(undefined);
  }

  _createClass(LoopbackPort, [{
    key: "postMessage",
    value: function postMessage(obj, transfers) {
      var _this6 = this;

      function cloneValue(value) {
        if (_typeof(value) !== 'object' || value === null) {
          return value;
        }

        if (cloned.has(value)) {
          return cloned.get(value);
        }

        var buffer, result;

        if ((buffer = value.buffer) && (0, _util.isArrayBuffer)(buffer)) {
          var transferable = transfers && transfers.includes(buffer);

          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 = Array.isArray(value) ? [] : {};
        cloned.set(value, result);

        for (var i in value) {
          var desc = void 0,
              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 () {
        _this6._listeners.forEach(function (listener) {
          listener.call(this, e);
        }, _this6);
      });
    }
  }, {
    key: "addEventListener",
    value: function addEventListener(name, listener) {
      this._listeners.push(listener);
    }
  }, {
    key: "removeEventListener",
    value: function removeEventListener(name, listener) {
      var i = this._listeners.indexOf(listener);

      this._listeners.splice(i, 1);
    }
  }, {
    key: "terminate",
    value: function terminate() {
      this._listeners.length = 0;
    }
  }]);

  return LoopbackPort;
}();

exports.LoopbackPort = LoopbackPort;

var PDFWorker = function PDFWorkerClosure() {
  var pdfWorkerPorts = new WeakMap();
  var nextFakeWorkerId = 0;
  var fakeWorkerFilesLoadedCapability;

  function _getWorkerSrc() {
    if (_worker_options.GlobalWorkerOptions.workerSrc) {
      return _worker_options.GlobalWorkerOptions.workerSrc;
    }

    if (typeof fallbackWorkerSrc !== 'undefined') {
      return fallbackWorkerSrc;
    }

    throw new Error('No "GlobalWorkerOptions.workerSrc" specified.');
  }

  function getMainThreadWorkerMessageHandler() {
    try {
      if (typeof window !== 'undefined') {
        return window.pdfjsWorker && window.pdfjsWorker.WorkerMessageHandler;
      }
    } catch (ex) {}

    return null;
  }

  function setupFakeWorkerGlobal() {
    if (fakeWorkerFilesLoadedCapability) {
      return fakeWorkerFilesLoadedCapability.promise;
    }

    fakeWorkerFilesLoadedCapability = (0, _util.createPromiseCapability)();
    var mainWorkerMessageHandler = getMainThreadWorkerMessageHandler();

    if (mainWorkerMessageHandler) {
      fakeWorkerFilesLoadedCapability.resolve(mainWorkerMessageHandler);
      return fakeWorkerFilesLoadedCapability.promise;
    }

    var loader = fakeWorkerFilesLoader || function () {
      return (0, _display_utils.loadScript)(_getWorkerSrc()).then(function () {
        return window.pdfjsWorker.WorkerMessageHandler;
      });
    };

    loader().then(fakeWorkerFilesLoadedCapability.resolve, fakeWorkerFilesLoadedCapability.reject);
    return fakeWorkerFilesLoadedCapability.promise;
  }

  function createCDNWrapper(url) {
    var wrapper = 'importScripts(\'' + url + '\');';
    return _util.URL.createObjectURL(new Blob([wrapper]));
  }

  var PDFWorker =
  /*#__PURE__*/
  function () {
    function PDFWorker() {
      var _ref6 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
          _ref6$name = _ref6.name,
          name = _ref6$name === void 0 ? null : _ref6$name,
          _ref6$port = _ref6.port,
          port = _ref6$port === void 0 ? null : _ref6$port,
          _ref6$postMessageTran = _ref6.postMessageTransfers,
          postMessageTransfers = _ref6$postMessageTran === void 0 ? true : _ref6$postMessageTran,
          _ref6$verbosity = _ref6.verbosity,
          verbosity = _ref6$verbosity === void 0 ? (0, _util.getVerbosityLevel)() : _ref6$verbosity;

      _classCallCheck(this, PDFWorker);

      if (port && pdfWorkerPorts.has(port)) {
        throw new Error('Cannot use more than one PDFWorker per port');
      }

      this.name = name;
      this.destroyed = false;
      this.postMessageTransfers = postMessageTransfers !== false;
      this.verbosity = verbosity;
      this._readyCapability = (0, _util.createPromiseCapability)();
      this._port = null;
      this._webWorker = null;
      this._messageHandler = null;

      if (port) {
        pdfWorkerPorts.set(port, this);

        this._initializeFromPort(port);

        return;
      }

      this._initialize();
    }

    _createClass(PDFWorker, [{
      key: "_initializeFromPort",
      value: function _initializeFromPort(port) {
        this._port = port;
        this._messageHandler = new _message_handler.MessageHandler('main', 'worker', port);

        this._messageHandler.on('ready', function () {});

        this._readyCapability.resolve();
      }
    }, {
      key: "_initialize",
      value: function _initialize() {
        var _this7 = this;

        if (typeof Worker !== 'undefined' && !isWorkerDisabled && !getMainThreadWorkerMessageHandler()) {
          var workerSrc = _getWorkerSrc();

          try {
            if (!(0, _util.isSameOrigin)(window.location.href, workerSrc)) {
              workerSrc = createCDNWrapper(new _util.URL(workerSrc, window.location).href);
            }

            var worker = new Worker(workerSrc);
            var messageHandler = new _message_handler.MessageHandler('main', 'worker', worker);

            var terminateEarly = function terminateEarly() {
              worker.removeEventListener('error', onWorkerError);
              messageHandler.destroy();
              worker.terminate();

              if (_this7.destroyed) {
                _this7._readyCapability.reject(new Error('Worker was destroyed'));
              } else {
                _this7._setupFakeWorker();
              }
            };

            var onWorkerError = function onWorkerError() {
              if (!_this7._webWorker) {
                terminateEarly();
              }
            };

            worker.addEventListener('error', onWorkerError);
            messageHandler.on('test', function (data) {
              worker.removeEventListener('error', onWorkerError);

              if (_this7.destroyed) {
                terminateEarly();
                return;
              }

              if (data && data.supportTypedArray) {
                _this7._messageHandler = messageHandler;
                _this7._port = worker;
                _this7._webWorker = worker;

                if (!data.supportTransfers) {
                  _this7.postMessageTransfers = false;
                }

                _this7._readyCapability.resolve();

                messageHandler.send('configure', {
                  verbosity: _this7.verbosity
                });
              } else {
                _this7._setupFakeWorker();

                messageHandler.destroy();
                worker.terminate();
              }
            });
            messageHandler.on('ready', function (data) {
              worker.removeEventListener('error', onWorkerError);

              if (_this7.destroyed) {
                terminateEarly();
                return;
              }

              try {
                sendTest();
              } catch (e) {
                _this7._setupFakeWorker();
              }
            });

            var sendTest = function sendTest() {
              var testObj = new Uint8Array([_this7.postMessageTransfers ? 255 : 0]);

              try {
                messageHandler.send('test', testObj, [testObj.buffer]);
              } catch (ex) {
                (0, _util.info)('Cannot use postMessage transfers');
                testObj[0] = 0;
                messageHandler.send('test', testObj);
              }
            };

            sendTest();
            return;
          } catch (e) {
            (0, _util.info)('The worker has been disabled.');
          }
        }

        this._setupFakeWorker();
      }
    }, {
      key: "_setupFakeWorker",
      value: function _setupFakeWorker() {
        var _this8 = this;

        if (!isWorkerDisabled) {
          (0, _util.warn)('Setting up fake worker.');
          isWorkerDisabled = true;
        }

        setupFakeWorkerGlobal().then(function (WorkerMessageHandler) {
          if (_this8.destroyed) {
            _this8._readyCapability.reject(new Error('Worker was destroyed'));

            return;
          }

          var port = new LoopbackPort();
          _this8._port = port;
          var id = 'fake' + nextFakeWorkerId++;
          var workerHandler = new _message_handler.MessageHandler(id + '_worker', id, port);
          WorkerMessageHandler.setup(workerHandler, port);
          var messageHandler = new _message_handler.MessageHandler(id, id + '_worker', port);
          _this8._messageHandler = messageHandler;

          _this8._readyCapability.resolve();
        })["catch"](function (reason) {
          _this8._readyCapability.reject(new Error("Setting up fake worker failed: \"".concat(reason.message, "\".")));
        });
      }
    }, {
      key: "destroy",
      value: function destroy() {
        this.destroyed = true;

        if (this._webWorker) {
          this._webWorker.terminate();

          this._webWorker = null;
        }

        pdfWorkerPorts["delete"](this._port);
        this._port = null;

        if (this._messageHandler) {
          this._messageHandler.destroy();

          this._messageHandler = null;
        }
      }
    }, {
      key: "promise",
      get: function get() {
        return this._readyCapability.promise;
      }
    }, {
      key: "port",
      get: function get() {
        return this._port;
      }
    }, {
      key: "messageHandler",
      get: function get() {
        return this._messageHandler;
      }
    }], [{
      key: "fromPort",
      value: function fromPort(params) {
        if (!params || !params.port) {
          throw new Error('PDFWorker.fromPort - invalid method signature.');
        }

        if (pdfWorkerPorts.has(params.port)) {
          return pdfWorkerPorts.get(params.port);
        }

        return new PDFWorker(params);
      }
    }, {
      key: "getWorkerSrc",
      value: function getWorkerSrc() {
        return _getWorkerSrc();
      }
    }]);

    return PDFWorker;
  }();

  return PDFWorker;
}();

exports.PDFWorker = PDFWorker;

var WorkerTransport =
/*#__PURE__*/
function () {
  function WorkerTransport(messageHandler, loadingTask, networkStream, params) {
    _classCallCheck(this, WorkerTransport);

    this.messageHandler = messageHandler;
    this.loadingTask = loadingTask;
    this.commonObjs = new PDFObjects();
    this.fontLoader = new _font_loader.FontLoader({
      docId: loadingTask.docId,
      onUnsupportedFeature: this._onUnsupportedFeature.bind(this)
    });
    this._params = params;
    this.CMapReaderFactory = new params.CMapReaderFactory({
      baseUrl: params.cMapUrl,
      isCompressed: params.cMapPacked
    });
    this.destroyed = false;
    this.destroyCapability = null;
    this._passwordCapability = null;
    this._networkStream = networkStream;
    this._fullReader = null;
    this._lastProgress = null;
    this.pageCache = [];
    this.pagePromises = [];
    this.downloadInfoCapability = (0, _util.createPromiseCapability)();
    this.setupMessageHandler();
  }

  _createClass(WorkerTransport, [{
    key: "destroy",
    value: function destroy() {
      var _this9 = this;

      if (this.destroyCapability) {
        return this.destroyCapability.promise;
      }

      this.destroyed = true;
      this.destroyCapability = (0, _util.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.length = 0;
      this.pagePromises.length = 0;
      var terminated = this.messageHandler.sendWithPromise('Terminate', null);
      waitOn.push(terminated);
      Promise.all(waitOn).then(function () {
        _this9.fontLoader.clear();

        if (_this9._networkStream) {
          _this9._networkStream.cancelAllRequests();
        }

        if (_this9.messageHandler) {
          _this9.messageHandler.destroy();

          _this9.messageHandler = null;
        }

        _this9.destroyCapability.resolve();
      }, this.destroyCapability.reject);
      return this.destroyCapability.promise;
    }
  }, {
    key: "setupMessageHandler",
    value: function setupMessageHandler() {
      var messageHandler = this.messageHandler,
          loadingTask = this.loadingTask;
      messageHandler.on('GetReader', function (data, sink) {
        var _this10 = this;

        (0, _util.assert)(this._networkStream);
        this._fullReader = this._networkStream.getFullReader();

        this._fullReader.onProgress = function (evt) {
          _this10._lastProgress = {
            loaded: evt.loaded,
            total: evt.total
          };
        };

        sink.onPull = function () {
          _this10._fullReader.read().then(function (_ref7) {
            var value = _ref7.value,
                done = _ref7.done;

            if (done) {
              sink.close();
              return;
            }

            (0, _util.assert)((0, _util.isArrayBuffer)(value));
            sink.enqueue(new Uint8Array(value), 1, [value]);
          })["catch"](function (reason) {
            sink.error(reason);
          });
        };

        sink.onCancel = function (reason) {
          _this10._fullReader.cancel(reason);
        };
      }, this);
      messageHandler.on('ReaderHeadersReady', function (data) {
        var _this11 = this;

        var headersCapability = (0, _util.createPromiseCapability)();
        var fullReader = this._fullReader;
        fullReader.headersReady.then(function () {
          if (!fullReader.isStreamingSupported || !fullReader.isRangeSupported) {
            if (_this11._lastProgress && loadingTask.onProgress) {
              loadingTask.onProgress(_this11._lastProgress);
            }

            fullReader.onProgress = function (evt) {
              if (loadingTask.onProgress) {
                loadingTask.onProgress({
                  loaded: evt.loaded,
                  total: evt.total
                });
              }
            };
          }

          headersCapability.resolve({
            isStreamingSupported: fullReader.isStreamingSupported,
            isRangeSupported: fullReader.isRangeSupported,
            contentLength: fullReader.contentLength
          });
        }, headersCapability.reject);
        return headersCapability.promise;
      }, this);
      messageHandler.on('GetRangeReader', function (data, sink) {
        (0, _util.assert)(this._networkStream);

        var rangeReader = this._networkStream.getRangeReader(data.begin, data.end);

        if (!rangeReader) {
          sink.close();
          return;
        }

        sink.onPull = function () {
          rangeReader.read().then(function (_ref8) {
            var value = _ref8.value,
                done = _ref8.done;

            if (done) {
              sink.close();
              return;
            }

            (0, _util.assert)((0, _util.isArrayBuffer)(value));
            sink.enqueue(new Uint8Array(value), 1, [value]);
          })["catch"](function (reason) {
            sink.error(reason);
          });
        };

        sink.onCancel = function (reason) {
          rangeReader.cancel(reason);
        };
      }, this);
      messageHandler.on('GetDoc', function (_ref9) {
        var pdfInfo = _ref9.pdfInfo;
        this._numPages = pdfInfo.numPages;

        loadingTask._capability.resolve(new PDFDocumentProxy(pdfInfo, this));
      }, this);
      messageHandler.on('PasswordRequest', function (exception) {
        var _this12 = this;

        this._passwordCapability = (0, _util.createPromiseCapability)();

        if (loadingTask.onPassword) {
          var updatePassword = function updatePassword(password) {
            _this12._passwordCapability.resolve({
              password: password
            });
          };

          try {
            loadingTask.onPassword(updatePassword, exception.code);
          } catch (ex) {
            this._passwordCapability.reject(ex);
          }
        } else {
          this._passwordCapability.reject(new _util.PasswordException(exception.message, exception.code));
        }

        return this._passwordCapability.promise;
      }, this);
      messageHandler.on('PasswordException', function (exception) {
        loadingTask._capability.reject(new _util.PasswordException(exception.message, exception.code));
      }, this);
      messageHandler.on('InvalidPDF', function (exception) {
        loadingTask._capability.reject(new _util.InvalidPDFException(exception.message));
      }, this);
      messageHandler.on('MissingPDF', function (exception) {
        loadingTask._capability.reject(new _util.MissingPDFException(exception.message));
      }, this);
      messageHandler.on('UnexpectedResponse', function (exception) {
        loadingTask._capability.reject(new _util.UnexpectedResponseException(exception.message, exception.status));
      }, this);
      messageHandler.on('UnknownError', function (exception) {
        loadingTask._capability.reject(new _util.UnknownErrorException(exception.message, exception.details));
      }, this);
      messageHandler.on('DataLoaded', function (data) {
        if (loadingTask.onProgress) {
          loadingTask.onProgress({
            loaded: data.length,
            total: data.length
          });
        }

        this.downloadInfoCapability.resolve(data);
      }, this);
      messageHandler.on('StartRenderPage', function (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 (data) {
        if (this.destroyed) {
          return;
        }

        var page = this.pageCache[data.pageIndex];

        page._renderPageChunk(data.operatorList, data.intent);
      }, this);
      messageHandler.on('commonobj', function (data) {
        var _this13 = this;

        if (this.destroyed) {
          return;
        }

        var _data = _slicedToArray(data, 3),
            id = _data[0],
            type = _data[1],
            exportedData = _data[2];

        if (this.commonObjs.has(id)) {
          return;
        }

        switch (type) {
          case 'Font':
            var params = this._params;

            if ('error' in exportedData) {
              var exportedError = exportedData.error;
              (0, _util.warn)("Error during font loading: ".concat(exportedError));
              this.commonObjs.resolve(id, exportedError);
              break;
            }

            var fontRegistry = null;

            if (params.pdfBug && _global_scope["default"].FontInspector && _global_scope["default"].FontInspector.enabled) {
              fontRegistry = {
                registerFont: function registerFont(font, url) {
                  _global_scope["default"]['FontInspector'].fontAdded(font, url);
                }
              };
            }

            var font = new _font_loader.FontFaceObject(exportedData, {
              isEvalSupported: params.isEvalSupported,
              disableFontFace: params.disableFontFace,
              ignoreErrors: params.ignoreErrors,
              onUnsupportedFeature: this._onUnsupportedFeature.bind(this),
              fontRegistry: fontRegistry
            });
            this.fontLoader.bind(font).then(function () {
              _this13.commonObjs.resolve(id, font);
            }, function (reason) {
              messageHandler.sendWithPromise('FontFallback', {
                id: id
              })["finally"](function () {
                _this13.commonObjs.resolve(id, font);
              });
            });
            break;

          case 'FontPath':
          case 'FontType3Res':
            this.commonObjs.resolve(id, exportedData);
            break;

          default:
            throw new Error("Got unknown common object type ".concat(type));
        }
      }, this);
      messageHandler.on('obj', function (data) {
        if (this.destroyed) {
          return undefined;
        }

        var _data2 = _slicedToArray(data, 4),
            id = _data2[0],
            pageIndex = _data2[1],
            type = _data2[2],
            imageData = _data2[3];

        var pageProxy = this.pageCache[pageIndex];

        if (pageProxy.objs.has(id)) {
          return undefined;
        }

        switch (type) {
          case 'JpegStream':
            return new Promise(function (resolve, reject) {
              var img = new Image();

              img.onload = function () {
                resolve(img);
              };

              img.onerror = function () {
                reject(new Error('Error during JPEG image loading'));
                (0, _display_utils.releaseImageResources)(img);
              };

              img.src = imageData;
            }).then(function (img) {
              pageProxy.objs.resolve(id, img);
            });

          case 'Image':
            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:
            throw new Error("Got unknown object type ".concat(type));
        }

        return undefined;
      }, this);
      messageHandler.on('DocProgress', function (data) {
        if (this.destroyed) {
          return;
        }

        if (loadingTask.onProgress) {
          loadingTask.onProgress({
            loaded: data.loaded,
            total: data.total
          });
        }
      }, this);
      messageHandler.on('PageError', function (data) {
        if (this.destroyed) {
          return;
        }

        var page = this.pageCache[data.pageIndex];
        var intentState = page.intentStates[data.intent];

        if (intentState.displayReadyCapability) {
          intentState.displayReadyCapability.reject(new Error(data.error));
        } else {
          throw new 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', this._onUnsupportedFeature, 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 _data3 = _slicedToArray(data, 2),
            imageUrl = _data3[0],
            components = _data3[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,
                height = img.height;
            var size = width * height;
            var rgbaLength = size * 4;
            var buf = new Uint8ClampedArray(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;

            if (components === 3) {
              for (var 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 (var _i2 = 0, _j = 0; _i2 < rgbaLength; _i2 += 4, _j++) {
                buf[_j] = data[_i2];
              }
            }

            resolve({
              data: buf,
              width: width,
              height: height
            });
            (0, _display_utils.releaseImageResources)(img);
            tmpCanvas.width = 0;
            tmpCanvas.height = 0;
            tmpCanvas = null;
            tmpCtx = null;
          };

          img.onerror = function () {
            reject(new Error('JpegDecode failed to load image'));
            (0, _display_utils.releaseImageResources)(img);
          };

          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);
    }
  }, {
    key: "_onUnsupportedFeature",
    value: function _onUnsupportedFeature(_ref10) {
      var featureId = _ref10.featureId;

      if (this.destroyed) {
        return;
      }

      if (this.loadingTask.onUnsupportedFeature) {
        this.loadingTask.onUnsupportedFeature(featureId);
      }
    }
  }, {
    key: "getData",
    value: function getData() {
      return this.messageHandler.sendWithPromise('GetData', null);
    }
  }, {
    key: "getPage",
    value: function getPage(pageNumber) {
      var _this14 = this;

      if (!Number.isInteger(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 (_this14.destroyed) {
          throw new Error('Transport destroyed');
        }

        var page = new PDFPageProxy(pageIndex, pageInfo, _this14, _this14._params.pdfBug);
        _this14.pageCache[pageIndex] = page;
        return page;
      });
      this.pagePromises[pageIndex] = promise;
      return promise;
    }
  }, {
    key: "getPageIndex",
    value: function getPageIndex(ref) {
      return this.messageHandler.sendWithPromise('GetPageIndex', {
        ref: ref
      })["catch"](function (reason) {
        return Promise.reject(new Error(reason));
      });
    }
  }, {
    key: "getAnnotations",
    value: function getAnnotations(pageIndex, intent) {
      return this.messageHandler.sendWithPromise('GetAnnotations', {
        pageIndex: pageIndex,
        intent: intent
      });
    }
  }, {
    key: "getDestinations",
    value: function getDestinations() {
      return this.messageHandler.sendWithPromise('GetDestinations', null);
    }
  }, {
    key: "getDestination",
    value: function getDestination(id) {
      if (typeof id !== 'string') {
        return Promise.reject(new Error('Invalid destination request.'));
      }

      return this.messageHandler.sendWithPromise('GetDestination', {
        id: id
      });
    }
  }, {
    key: "getPageLabels",
    value: function getPageLabels() {
      return this.messageHandler.sendWithPromise('GetPageLabels', null);
    }
  }, {
    key: "getPageLayout",
    value: function getPageLayout() {
      return this.messageHandler.sendWithPromise('GetPageLayout', null);
    }
  }, {
    key: "getPageMode",
    value: function getPageMode() {
      return this.messageHandler.sendWithPromise('GetPageMode', null);
    }
  }, {
    key: "getViewerPreferences",
    value: function getViewerPreferences() {
      return this.messageHandler.sendWithPromise('GetViewerPreferences', null);
    }
  }, {
    key: "getOpenActionDestination",
    value: function getOpenActionDestination() {
      return this.messageHandler.sendWithPromise('GetOpenActionDestination', null);
    }
  }, {
    key: "getAttachments",
    value: function getAttachments() {
      return this.messageHandler.sendWithPromise('GetAttachments', null);
    }
  }, {
    key: "getJavaScript",
    value: function getJavaScript() {
      return this.messageHandler.sendWithPromise('GetJavaScript', null);
    }
  }, {
    key: "getOutline",
    value: function getOutline() {
      return this.messageHandler.sendWithPromise('GetOutline', null);
    }
  }, {
    key: "getPermissions",
    value: function getPermissions() {
      return this.messageHandler.sendWithPromise('GetPermissions', null);
    }
  }, {
    key: "getMetadata",
    value: function getMetadata() {
      var _this15 = this;

      return this.messageHandler.sendWithPromise('GetMetadata', null).then(function (results) {
        return {
          info: results[0],
          metadata: results[1] ? new _metadata.Metadata(results[1]) : null,
          contentDispositionFilename: _this15._fullReader ? _this15._fullReader.filename : null
        };
      });
    }
  }, {
    key: "getStats",
    value: function getStats() {
      return this.messageHandler.sendWithPromise('GetStats', null);
    }
  }, {
    key: "startCleanup",
    value: function startCleanup() {
      var _this16 = this;

      this.messageHandler.sendWithPromise('Cleanup', null).then(function () {
        for (var i = 0, ii = _this16.pageCache.length; i < ii; i++) {
          var page = _this16.pageCache[i];

          if (page) {
            page.cleanup();
          }
        }

        _this16.commonObjs.clear();

        _this16.fontLoader.clear();
      });
    }
  }, {
    key: "loadingParams",
    get: function get() {
      var params = this._params;
      return (0, _util.shadow)(this, 'loadingParams', {
        disableAutoFetch: params.disableAutoFetch,
        disableCreateObjectURL: params.disableCreateObjectURL,
        disableFontFace: params.disableFontFace,
        nativeImageDecoderSupport: params.nativeImageDecoderSupport
      });
    }
  }]);

  return WorkerTransport;
}();

var PDFObjects =
/*#__PURE__*/
function () {
  function PDFObjects() {
    _classCallCheck(this, PDFObjects);

    this._objs = Object.create(null);
  }

  _createClass(PDFObjects, [{
    key: "_ensureObj",
    value: function _ensureObj(objId) {
      if (this._objs[objId]) {
        return this._objs[objId];
      }

      return this._objs[objId] = {
        capability: (0, _util.createPromiseCapability)(),
        data: null,
        resolved: false
      };
    }
  }, {
    key: "get",
    value: function get(objId) {
      var callback = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;

      if (callback) {
        this._ensureObj(objId).capability.promise.then(callback);

        return null;
      }

      var obj = this._objs[objId];

      if (!obj || !obj.resolved) {
        throw new Error("Requesting object that isn't resolved yet ".concat(objId, "."));
      }

      return obj.data;
    }
  }, {
    key: "has",
    value: function has(objId) {
      var obj = this._objs[objId];
      return obj ? obj.resolved : false;
    }
  }, {
    key: "resolve",
    value: function resolve(objId, data) {
      var obj = this._ensureObj(objId);

      obj.resolved = true;
      obj.data = data;
      obj.capability.resolve(data);
    }
  }, {
    key: "clear",
    value: function clear() {
      for (var objId in this._objs) {
        var data = this._objs[objId].data;

        if (typeof Image !== 'undefined' && data instanceof Image) {
          (0, _display_utils.releaseImageResources)(data);
        }
      }

      this._objs = Object.create(null);
    }
  }]);

  return PDFObjects;
}();

var RenderTask =
/*#__PURE__*/
function () {
  function RenderTask(internalRenderTask) {
    _classCallCheck(this, RenderTask);

    this._internalRenderTask = internalRenderTask;
    this.onContinue = null;
  }

  _createClass(RenderTask, [{
    key: "cancel",
    value: function cancel() {
      this._internalRenderTask.cancel();
    }
  }, {
    key: "then",
    value: function then(onFulfilled, onRejected) {
      (0, _display_utils.deprecated)('RenderTask.then method, use the `promise` getter instead.');
      return this.promise.then.apply(this.promise, arguments);
    }
  }, {
    key: "promise",
    get: function get() {
      return this._internalRenderTask.capability.promise;
    }
  }]);

  return RenderTask;
}();

var InternalRenderTask = function InternalRenderTaskClosure() {
  var canvasInRendering = new WeakSet();

  var InternalRenderTask =
  /*#__PURE__*/
  function () {
    function InternalRenderTask(_ref11) {
      var callback = _ref11.callback,
          params = _ref11.params,
          objs = _ref11.objs,
          commonObjs = _ref11.commonObjs,
          operatorList = _ref11.operatorList,
          pageNumber = _ref11.pageNumber,
          canvasFactory = _ref11.canvasFactory,
          webGLContext = _ref11.webGLContext,
          _ref11$useRequestAnim = _ref11.useRequestAnimationFrame,
          useRequestAnimationFrame = _ref11$useRequestAnim === void 0 ? false : _ref11$useRequestAnim,
          _ref11$pdfBug = _ref11.pdfBug,
          pdfBug = _ref11$pdfBug === void 0 ? false : _ref11$pdfBug;

      _classCallCheck(this, InternalRenderTask);

      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.webGLContext = webGLContext;
      this._pdfBug = pdfBug;
      this.running = false;
      this.graphicsReadyCallback = null;
      this.graphicsReady = false;
      this._useRequestAnimationFrame = useRequestAnimationFrame === true && typeof window !== 'undefined';
      this.cancelled = false;
      this.capability = (0, _util.createPromiseCapability)();
      this.task = new RenderTask(this);
      this._continueBound = this._continue.bind(this);
      this._scheduleNextBound = this._scheduleNext.bind(this);
      this._nextBound = this._next.bind(this);
      this._canvas = params.canvasContext.canvas;
    }

    _createClass(InternalRenderTask, [{
      key: "initializeGraphics",
      value: function initializeGraphics() {
        var transparency = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

        if (this.cancelled) {
          return;
        }

        if (this._canvas) {
          if (canvasInRendering.has(this._canvas)) {
            throw new Error('Cannot use the same canvas during multiple render() operations. ' + 'Use different canvas or ensure previous operations were ' + 'cancelled or completed.');
          }

          canvasInRendering.add(this._canvas);
        }

        if (this._pdfBug && _global_scope["default"].StepperManager && _global_scope["default"].StepperManager.enabled) {
          this.stepper = _global_scope["default"].StepperManager.create(this.pageNumber - 1);
          this.stepper.init(this.operatorList);
          this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
        }

        var _this$params = this.params,
            canvasContext = _this$params.canvasContext,
            viewport = _this$params.viewport,
            transform = _this$params.transform,
            imageLayer = _this$params.imageLayer,
            background = _this$params.background;
        this.gfx = new _canvas.CanvasGraphics(canvasContext, this.commonObjs, this.objs, this.canvasFactory, this.webGLContext, imageLayer);
        this.gfx.beginDrawing({
          transform: transform,
          viewport: viewport,
          transparency: transparency,
          background: background
        });
        this.operatorListIdx = 0;
        this.graphicsReady = true;

        if (this.graphicsReadyCallback) {
          this.graphicsReadyCallback();
        }
      }
    }, {
      key: "cancel",
      value: function cancel() {
        var error = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
        this.running = false;
        this.cancelled = true;

        if (this.gfx) {
          this.gfx.endDrawing();
        }

        if (this._canvas) {
          canvasInRendering["delete"](this._canvas);
        }

        this.callback(error || new _display_utils.RenderingCancelledException("Rendering cancelled, page ".concat(this.pageNumber), 'canvas'));
      }
    }, {
      key: "operatorListChanged",
      value: function 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();
      }
    }, {
      key: "_continue",
      value: function _continue() {
        this.running = true;

        if (this.cancelled) {
          return;
        }

        if (this.task.onContinue) {
          this.task.onContinue(this._scheduleNextBound);
        } else {
          this._scheduleNext();
        }
      }
    }, {
      key: "_scheduleNext",
      value: function _scheduleNext() {
        var _this17 = this;

        if (this._useRequestAnimationFrame) {
          window.requestAnimationFrame(function () {
            _this17._nextBound()["catch"](_this17.cancel.bind(_this17));
          });
        } else {
          Promise.resolve().then(this._nextBound)["catch"](this.cancel.bind(this));
        }
      }
    }, {
      key: "_next",
      value: function () {
        var _next2 = _asyncToGenerator(
        /*#__PURE__*/
        _regenerator["default"].mark(function _callee() {
          return _regenerator["default"].wrap(function _callee$(_context) {
            while (1) {
              switch (_context.prev = _context.next) {
                case 0:
                  if (!this.cancelled) {
                    _context.next = 2;
                    break;
                  }

                  return _context.abrupt("return");

                case 2:
                  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();

                      if (this._canvas) {
                        canvasInRendering["delete"](this._canvas);
                      }

                      this.callback();
                    }
                  }

                case 4:
                case "end":
                  return _context.stop();
              }
            }
          }, _callee, this);
        }));

        function _next() {
          return _next2.apply(this, arguments);
        }

        return _next;
      }()
    }]);

    return InternalRenderTask;
  }();

  return InternalRenderTask;
}();

var version = '2.2.228';
exports.version = version;
var build = 'd7afb74a';
exports.build = build;