pdfjs-dist/lib/web/app.js

Generic build of Mozilla's PDF.js library.

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2021 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.PDFViewerApplication = exports.PDFPrintServiceFactory = exports.DefaultExternalServices = void 0;

var _ui_utils = require("./ui_utils.js");

var _app_options = require("./app_options.js");

var _pdf = require("../pdf");

var _pdf_cursor_tools = require("./pdf_cursor_tools.js");

var _pdf_rendering_queue = require("./pdf_rendering_queue.js");

var _overlay_manager = require("./overlay_manager.js");

var _password_prompt = require("./password_prompt.js");

var _pdf_attachment_viewer = require("./pdf_attachment_viewer.js");

var _pdf_document_properties = require("./pdf_document_properties.js");

var _pdf_find_bar = require("./pdf_find_bar.js");

var _pdf_find_controller = require("./pdf_find_controller.js");

var _pdf_history = require("./pdf_history.js");

var _pdf_layer_viewer = require("./pdf_layer_viewer.js");

var _pdf_link_service = require("./pdf_link_service.js");

var _pdf_outline_viewer = require("./pdf_outline_viewer.js");

var _pdf_presentation_mode = require("./pdf_presentation_mode.js");

var _pdf_scripting_manager = require("./pdf_scripting_manager.js");

var _pdf_sidebar = require("./pdf_sidebar.js");

var _pdf_sidebar_resizer = require("./pdf_sidebar_resizer.js");

var _pdf_thumbnail_viewer = require("./pdf_thumbnail_viewer.js");

var _pdf_viewer = require("./pdf_viewer.js");

var _secondary_toolbar = require("./secondary_toolbar.js");

var _toolbar = require("./toolbar.js");

var _viewer_compatibility = require("./viewer_compatibility.js");

var _view_history = require("./view_history.js");

const DEFAULT_SCALE_DELTA = 1.1;
const DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT = 5000;
const FORCE_PAGES_LOADED_TIMEOUT = 10000;
const WHEEL_ZOOM_DISABLED_TIMEOUT = 1000;
const ENABLE_PERMISSIONS_CLASS = "enablePermissions";
const ViewOnLoad = {
  UNKNOWN: -1,
  PREVIOUS: 0,
  INITIAL: 1
};
const ViewerCssTheme = {
  AUTOMATIC: 0,
  LIGHT: 1,
  DARK: 2
};
const KNOWN_VERSIONS = ["1.0", "1.1", "1.2", "1.3", "1.4", "1.5", "1.6", "1.7", "1.8", "1.9", "2.0", "2.1", "2.2", "2.3"];
const KNOWN_GENERATORS = ["acrobat distiller", "acrobat pdfwriter", "adobe livecycle", "adobe pdf library", "adobe photoshop", "ghostscript", "tcpdf", "cairo", "dvipdfm", "dvips", "pdftex", "pdfkit", "itext", "prince", "quarkxpress", "mac os x", "microsoft", "openoffice", "oracle", "luradocument", "pdf-xchange", "antenna house", "aspose.cells", "fpdf"];

class DefaultExternalServices {
  constructor() {
    throw new Error("Cannot initialize DefaultExternalServices.");
  }

  static updateFindControlState(data) {}

  static updateFindMatchesCount(data) {}

  static initPassiveLoading(callbacks) {}

  static async fallback(data) {}

  static reportTelemetry(data) {}

  static createDownloadManager(options) {
    throw new Error("Not implemented: createDownloadManager");
  }

  static createPreferences() {
    throw new Error("Not implemented: createPreferences");
  }

  static createL10n(options) {
    throw new Error("Not implemented: createL10n");
  }

  static createScripting(options) {
    throw new Error("Not implemented: createScripting");
  }

  static get supportsIntegratedFind() {
    return (0, _pdf.shadow)(this, "supportsIntegratedFind", false);
  }

  static get supportsDocumentFonts() {
    return (0, _pdf.shadow)(this, "supportsDocumentFonts", true);
  }

  static get supportedMouseWheelZoomModifierKeys() {
    return (0, _pdf.shadow)(this, "supportedMouseWheelZoomModifierKeys", {
      ctrlKey: true,
      metaKey: true
    });
  }

  static get isInAutomation() {
    return (0, _pdf.shadow)(this, "isInAutomation", false);
  }

}

exports.DefaultExternalServices = DefaultExternalServices;
const PDFViewerApplication = {
  initialBookmark: document.location.hash.substring(1),
  _initializedCapability: (0, _pdf.createPromiseCapability)(),
  fellback: false,
  appConfig: null,
  pdfDocument: null,
  pdfLoadingTask: null,
  printService: null,
  pdfViewer: null,
  pdfThumbnailViewer: null,
  pdfRenderingQueue: null,
  pdfPresentationMode: null,
  pdfDocumentProperties: null,
  pdfLinkService: null,
  pdfHistory: null,
  pdfSidebar: null,
  pdfSidebarResizer: null,
  pdfOutlineViewer: null,
  pdfAttachmentViewer: null,
  pdfLayerViewer: null,
  pdfCursorTools: null,
  pdfScriptingManager: null,
  store: null,
  downloadManager: null,
  overlayManager: null,
  preferences: null,
  toolbar: null,
  secondaryToolbar: null,
  eventBus: null,
  l10n: null,
  isInitialViewSet: false,
  downloadComplete: false,
  isViewerEmbedded: window.parent !== window,
  url: "",
  baseUrl: "",
  externalServices: DefaultExternalServices,
  _boundEvents: Object.create(null),
  documentInfo: null,
  metadata: null,
  _contentDispositionFilename: null,
  _contentLength: null,
  triggerDelayedFallback: null,
  _saveInProgress: false,
  _wheelUnusedTicks: 0,
  _idleCallbacks: new Set(),

  async initialize(appConfig) {
    this.preferences = this.externalServices.createPreferences();
    this.appConfig = appConfig;
    await this._readPreferences();
    await this._parseHashParameters();

    this._forceCssTheme();

    await this._initializeL10n();

    if (this.isViewerEmbedded && _app_options.AppOptions.get("externalLinkTarget") === _pdf.LinkTarget.NONE) {
      _app_options.AppOptions.set("externalLinkTarget", _pdf.LinkTarget.TOP);
    }

    await this._initializeViewerComponents();
    this.bindEvents();
    this.bindWindowEvents();
    const appContainer = appConfig.appContainer || document.documentElement;
    this.l10n.translate(appContainer).then(() => {
      this.eventBus.dispatch("localized", {
        source: this
      });
    });

    this._initializedCapability.resolve();
  },

  async _readPreferences() {
    if (_app_options.AppOptions.get("disablePreferences")) {
      return;
    }

    try {
      _app_options.AppOptions.setAll(await this.preferences.getAll());
    } catch (reason) {
      console.error(`_readPreferences: "${reason?.message}".`);
    }
  },

  async _parseHashParameters() {
    if (!_app_options.AppOptions.get("pdfBugEnabled")) {
      return undefined;
    }

    const hash = document.location.hash.substring(1);

    if (!hash) {
      return undefined;
    }

    const hashParams = (0, _ui_utils.parseQueryString)(hash),
          waitOn = [];

    if ("disableworker" in hashParams && hashParams.disableworker === "true") {
      waitOn.push(loadFakeWorker());
    }

    if ("disablerange" in hashParams) {
      _app_options.AppOptions.set("disableRange", hashParams.disablerange === "true");
    }

    if ("disablestream" in hashParams) {
      _app_options.AppOptions.set("disableStream", hashParams.disablestream === "true");
    }

    if ("disableautofetch" in hashParams) {
      _app_options.AppOptions.set("disableAutoFetch", hashParams.disableautofetch === "true");
    }

    if ("disablefontface" in hashParams) {
      _app_options.AppOptions.set("disableFontFace", hashParams.disablefontface === "true");
    }

    if ("disablehistory" in hashParams) {
      _app_options.AppOptions.set("disableHistory", hashParams.disablehistory === "true");
    }

    if ("webgl" in hashParams) {
      _app_options.AppOptions.set("enableWebGL", hashParams.webgl === "true");
    }

    if ("verbosity" in hashParams) {
      _app_options.AppOptions.set("verbosity", hashParams.verbosity | 0);
    }

    if ("textlayer" in hashParams) {
      switch (hashParams.textlayer) {
        case "off":
          _app_options.AppOptions.set("textLayerMode", _ui_utils.TextLayerMode.DISABLE);

          break;

        case "visible":
        case "shadow":
        case "hover":
          const viewer = this.appConfig.viewerContainer;
          viewer.classList.add("textLayer-" + hashParams.textlayer);
          break;
      }
    }

    if ("pdfbug" in hashParams) {
      _app_options.AppOptions.set("pdfBug", true);

      _app_options.AppOptions.set("fontExtraProperties", true);

      const enabled = hashParams.pdfbug.split(",");
      waitOn.push(loadAndEnablePDFBug(enabled));
    }

    if ("locale" in hashParams) {
      _app_options.AppOptions.set("locale", hashParams.locale);
    }

    if (waitOn.length === 0) {
      return undefined;
    }

    return Promise.all(waitOn).catch(reason => {
      console.error(`_parseHashParameters: "${reason.message}".`);
    });
  },

  async _initializeL10n() {
    this.l10n = this.externalServices.createL10n({
      locale: _app_options.AppOptions.get("locale")
    });
    const dir = await this.l10n.getDirection();
    document.getElementsByTagName("html")[0].dir = dir;
  },

  _forceCssTheme() {
    const cssTheme = _app_options.AppOptions.get("viewerCssTheme");

    if (cssTheme === ViewerCssTheme.AUTOMATIC || !Object.values(ViewerCssTheme).includes(cssTheme)) {
      return;
    }

    try {
      const styleSheet = document.styleSheets[0];
      const cssRules = styleSheet?.cssRules || [];

      for (let i = 0, ii = cssRules.length; i < ii; i++) {
        const rule = cssRules[i];

        if (rule instanceof CSSMediaRule && rule.media?.[0] === "(prefers-color-scheme: dark)") {
          if (cssTheme === ViewerCssTheme.LIGHT) {
            styleSheet.deleteRule(i);
            return;
          }

          const darkRules = /^@media \(prefers-color-scheme: dark\) {\n\s*([\w\s-.,:;/\\{}()]+)\n}$/.exec(rule.cssText);

          if (darkRules?.[1]) {
            styleSheet.deleteRule(i);
            styleSheet.insertRule(darkRules[1], i);
          }

          return;
        }
      }
    } catch (reason) {
      console.error(`_forceCssTheme: "${reason?.message}".`);
    }
  },

  async _initializeViewerComponents() {
    const appConfig = this.appConfig;
    const eventBus = appConfig.eventBus || new _ui_utils.EventBus({
      isInAutomation: this.externalServices.isInAutomation
    });
    this.eventBus = eventBus;
    this.overlayManager = new _overlay_manager.OverlayManager();
    const pdfRenderingQueue = new _pdf_rendering_queue.PDFRenderingQueue();
    pdfRenderingQueue.onIdle = this._cleanup.bind(this);
    this.pdfRenderingQueue = pdfRenderingQueue;
    const pdfLinkService = new _pdf_link_service.PDFLinkService({
      eventBus,
      externalLinkTarget: _app_options.AppOptions.get("externalLinkTarget"),
      externalLinkRel: _app_options.AppOptions.get("externalLinkRel"),
      ignoreDestinationZoom: _app_options.AppOptions.get("ignoreDestinationZoom")
    });
    this.pdfLinkService = pdfLinkService;
    const downloadManager = this.externalServices.createDownloadManager();
    this.downloadManager = downloadManager;
    const findController = new _pdf_find_controller.PDFFindController({
      linkService: pdfLinkService,
      eventBus
    });
    this.findController = findController;
    const pdfScriptingManager = new _pdf_scripting_manager.PDFScriptingManager({
      eventBus,
      sandboxBundleSrc: _app_options.AppOptions.get("sandboxBundleSrc"),
      scriptingFactory: this.externalServices,
      docPropertiesLookup: this._scriptingDocProperties.bind(this)
    });
    this.pdfScriptingManager = pdfScriptingManager;
    const container = appConfig.mainContainer;
    const viewer = appConfig.viewerContainer;
    this.pdfViewer = new _pdf_viewer.PDFViewer({
      container,
      viewer,
      eventBus,
      renderingQueue: pdfRenderingQueue,
      linkService: pdfLinkService,
      downloadManager,
      findController,
      scriptingManager: pdfScriptingManager,
      renderer: _app_options.AppOptions.get("renderer"),
      enableWebGL: _app_options.AppOptions.get("enableWebGL"),
      l10n: this.l10n,
      textLayerMode: _app_options.AppOptions.get("textLayerMode"),
      imageResourcesPath: _app_options.AppOptions.get("imageResourcesPath"),
      renderInteractiveForms: _app_options.AppOptions.get("renderInteractiveForms"),
      enablePrintAutoRotate: _app_options.AppOptions.get("enablePrintAutoRotate"),
      useOnlyCssZoom: _app_options.AppOptions.get("useOnlyCssZoom"),
      maxCanvasPixels: _app_options.AppOptions.get("maxCanvasPixels"),
      enableScripting: _app_options.AppOptions.get("enableScripting")
    });
    pdfRenderingQueue.setViewer(this.pdfViewer);
    pdfLinkService.setViewer(this.pdfViewer);
    pdfScriptingManager.setViewer(this.pdfViewer);
    this.pdfThumbnailViewer = new _pdf_thumbnail_viewer.PDFThumbnailViewer({
      container: appConfig.sidebar.thumbnailView,
      eventBus,
      renderingQueue: pdfRenderingQueue,
      linkService: pdfLinkService,
      l10n: this.l10n
    });
    pdfRenderingQueue.setThumbnailViewer(this.pdfThumbnailViewer);
    this.pdfHistory = new _pdf_history.PDFHistory({
      linkService: pdfLinkService,
      eventBus
    });
    pdfLinkService.setHistory(this.pdfHistory);

    if (!this.supportsIntegratedFind) {
      this.findBar = new _pdf_find_bar.PDFFindBar(appConfig.findBar, eventBus, this.l10n);
    }

    this.pdfDocumentProperties = new _pdf_document_properties.PDFDocumentProperties(appConfig.documentProperties, this.overlayManager, eventBus, this.l10n);
    this.pdfCursorTools = new _pdf_cursor_tools.PDFCursorTools({
      container,
      eventBus,
      cursorToolOnLoad: _app_options.AppOptions.get("cursorToolOnLoad")
    });
    this.toolbar = new _toolbar.Toolbar(appConfig.toolbar, eventBus, this.l10n);
    this.secondaryToolbar = new _secondary_toolbar.SecondaryToolbar(appConfig.secondaryToolbar, container, eventBus);

    if (this.supportsFullscreen) {
      this.pdfPresentationMode = new _pdf_presentation_mode.PDFPresentationMode({
        container,
        pdfViewer: this.pdfViewer,
        eventBus
      });
    }

    this.passwordPrompt = new _password_prompt.PasswordPrompt(appConfig.passwordOverlay, this.overlayManager, this.l10n, this.isViewerEmbedded);
    this.pdfOutlineViewer = new _pdf_outline_viewer.PDFOutlineViewer({
      container: appConfig.sidebar.outlineView,
      eventBus,
      linkService: pdfLinkService
    });
    this.pdfAttachmentViewer = new _pdf_attachment_viewer.PDFAttachmentViewer({
      container: appConfig.sidebar.attachmentsView,
      eventBus,
      downloadManager
    });
    this.pdfLayerViewer = new _pdf_layer_viewer.PDFLayerViewer({
      container: appConfig.sidebar.layersView,
      eventBus,
      l10n: this.l10n
    });
    this.pdfSidebar = new _pdf_sidebar.PDFSidebar({
      elements: appConfig.sidebar,
      pdfViewer: this.pdfViewer,
      pdfThumbnailViewer: this.pdfThumbnailViewer,
      eventBus,
      l10n: this.l10n
    });
    this.pdfSidebar.onToggled = this.forceRendering.bind(this);
    this.pdfSidebarResizer = new _pdf_sidebar_resizer.PDFSidebarResizer(appConfig.sidebarResizer, eventBus, this.l10n);
  },

  run(config) {
    this.initialize(config).then(webViewerInitialized);
  },

  get initialized() {
    return this._initializedCapability.settled;
  },

  get initializedPromise() {
    return this._initializedCapability.promise;
  },

  zoomIn(ticks) {
    if (this.pdfViewer.isInPresentationMode) {
      return;
    }

    let newScale = this.pdfViewer.currentScale;

    do {
      newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2);
      newScale = Math.ceil(newScale * 10) / 10;
      newScale = Math.min(_ui_utils.MAX_SCALE, newScale);
    } while (--ticks > 0 && newScale < _ui_utils.MAX_SCALE);

    this.pdfViewer.currentScaleValue = newScale;
  },

  zoomOut(ticks) {
    if (this.pdfViewer.isInPresentationMode) {
      return;
    }

    let newScale = this.pdfViewer.currentScale;

    do {
      newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2);
      newScale = Math.floor(newScale * 10) / 10;
      newScale = Math.max(_ui_utils.MIN_SCALE, newScale);
    } while (--ticks > 0 && newScale > _ui_utils.MIN_SCALE);

    this.pdfViewer.currentScaleValue = newScale;
  },

  zoomReset() {
    if (this.pdfViewer.isInPresentationMode) {
      return;
    }

    this.pdfViewer.currentScaleValue = _ui_utils.DEFAULT_SCALE_VALUE;
  },

  get pagesCount() {
    return this.pdfDocument ? this.pdfDocument.numPages : 0;
  },

  get page() {
    return this.pdfViewer.currentPageNumber;
  },

  set page(val) {
    this.pdfViewer.currentPageNumber = val;
  },

  get supportsPrinting() {
    return PDFPrintServiceFactory.instance.supportsPrinting;
  },

  get supportsFullscreen() {
    const doc = document.documentElement;
    let support = !!(doc.requestFullscreen || doc.mozRequestFullScreen || doc.webkitRequestFullScreen);

    if (document.fullscreenEnabled === false || document.mozFullScreenEnabled === false || document.webkitFullscreenEnabled === false) {
      support = false;
    }

    return (0, _pdf.shadow)(this, "supportsFullscreen", support);
  },

  get supportsIntegratedFind() {
    return this.externalServices.supportsIntegratedFind;
  },

  get supportsDocumentFonts() {
    return this.externalServices.supportsDocumentFonts;
  },

  get loadingBar() {
    const bar = new _ui_utils.ProgressBar("#loadingBar");
    return (0, _pdf.shadow)(this, "loadingBar", bar);
  },

  get supportedMouseWheelZoomModifierKeys() {
    return this.externalServices.supportedMouseWheelZoomModifierKeys;
  },

  initPassiveLoading() {
    throw new Error("Not implemented: initPassiveLoading");
  },

  setTitleUsingUrl(url = "") {
    this.url = url;
    this.baseUrl = url.split("#")[0];
    let title = (0, _pdf.getPdfFilenameFromUrl)(url, "");

    if (!title) {
      try {
        title = decodeURIComponent((0, _pdf.getFilenameFromUrl)(url)) || url;
      } catch (ex) {
        title = url;
      }
    }

    this.setTitle(title);
  },

  setTitle(title) {
    if (this.isViewerEmbedded) {
      return;
    }

    document.title = title;
  },

  get _docFilename() {
    return this._contentDispositionFilename || (0, _pdf.getPdfFilenameFromUrl)(this.url);
  },

  _cancelIdleCallbacks() {
    if (!this._idleCallbacks.size) {
      return;
    }

    for (const callback of this._idleCallbacks) {
      window.cancelIdleCallback(callback);
    }

    this._idleCallbacks.clear();
  },

  async close() {
    this._unblockDocumentLoadEvent();

    const {
      container
    } = this.appConfig.errorWrapper;
    container.hidden = true;

    if (!this.pdfLoadingTask) {
      return;
    }

    if (this.pdfDocument?.annotationStorage.size > 0 && this._annotationStorageModified) {
      try {
        await this.save({
          sourceEventType: "save"
        });
      } catch (reason) {}
    }

    const promises = [];
    promises.push(this.pdfLoadingTask.destroy());
    this.pdfLoadingTask = null;

    if (this.pdfDocument) {
      this.pdfDocument = null;
      this.pdfThumbnailViewer.setDocument(null);
      this.pdfViewer.setDocument(null);
      this.pdfLinkService.setDocument(null);
      this.pdfDocumentProperties.setDocument(null);
    }

    webViewerResetPermissions();
    this.store = null;
    this.isInitialViewSet = false;
    this.downloadComplete = false;
    this.url = "";
    this.baseUrl = "";
    this.documentInfo = null;
    this.metadata = null;
    this._contentDispositionFilename = null;
    this._contentLength = null;
    this.triggerDelayedFallback = null;
    this._saveInProgress = false;

    this._cancelIdleCallbacks();

    promises.push(this.pdfScriptingManager.destroyPromise);
    this.pdfSidebar.reset();
    this.pdfOutlineViewer.reset();
    this.pdfAttachmentViewer.reset();
    this.pdfLayerViewer.reset();

    if (this.pdfHistory) {
      this.pdfHistory.reset();
    }

    if (this.findBar) {
      this.findBar.reset();
    }

    this.toolbar.reset();
    this.secondaryToolbar.reset();

    if (typeof PDFBug !== "undefined") {
      PDFBug.cleanup();
    }

    await Promise.all(promises);
  },

  async open(file, args) {
    if (this.pdfLoadingTask) {
      await this.close();
    }

    const workerParameters = _app_options.AppOptions.getAll(_app_options.OptionKind.WORKER);

    for (const key in workerParameters) {
      _pdf.GlobalWorkerOptions[key] = workerParameters[key];
    }

    const parameters = Object.create(null);

    if (typeof file === "string") {
      this.setTitleUsingUrl(file);
      parameters.url = file;
    } else if (file && "byteLength" in file) {
      parameters.data = file;
    } else if (file.url && file.originalUrl) {
      this.setTitleUsingUrl(file.originalUrl);
      parameters.url = file.url;
    }

    const apiParameters = _app_options.AppOptions.getAll(_app_options.OptionKind.API);

    for (const key in apiParameters) {
      let value = apiParameters[key];

      if (key === "docBaseUrl" && !value) {}

      parameters[key] = value;
    }

    if (args) {
      for (const key in args) {
        parameters[key] = args[key];
      }
    }

    const loadingTask = (0, _pdf.getDocument)(parameters);
    this.pdfLoadingTask = loadingTask;

    loadingTask.onPassword = (updateCallback, reason) => {
      this.pdfLinkService.externalLinkEnabled = false;
      this.passwordPrompt.setUpdateCallback(updateCallback, reason);
      this.passwordPrompt.open();
    };

    loadingTask.onProgress = ({
      loaded,
      total
    }) => {
      this.progress(loaded / total);
    };

    loadingTask.onUnsupportedFeature = this.fallback.bind(this);
    return loadingTask.promise.then(pdfDocument => {
      this.load(pdfDocument);
    }, exception => {
      if (loadingTask !== this.pdfLoadingTask) {
        return undefined;
      }

      let key = "loading_error";

      if (exception instanceof _pdf.InvalidPDFException) {
        key = "invalid_file_error";
      } else if (exception instanceof _pdf.MissingPDFException) {
        key = "missing_file_error";
      } else if (exception instanceof _pdf.UnexpectedResponseException) {
        key = "unexpected_response_error";
      }

      return this.l10n.get(key).then(msg => {
        this._documentError(msg, {
          message: exception?.message
        });

        throw exception;
      });
    });
  },

  _ensureDownloadComplete() {
    if (this.pdfDocument && this.downloadComplete) {
      return;
    }

    throw new Error("PDF document not downloaded.");
  },

  async download({
    sourceEventType = "download"
  } = {}) {
    const url = this.baseUrl,
          filename = this._docFilename;

    try {
      this._ensureDownloadComplete();

      const data = await this.pdfDocument.getData();
      const blob = new Blob([data], {
        type: "application/pdf"
      });
      await this.downloadManager.download(blob, url, filename, sourceEventType);
    } catch (reason) {
      await this.downloadManager.downloadUrl(url, filename);
    }
  },

  async save({
    sourceEventType = "download"
  } = {}) {
    if (this._saveInProgress) {
      return;
    }

    this._saveInProgress = true;
    await this.pdfScriptingManager.dispatchWillSave();
    const url = this.baseUrl,
          filename = this._docFilename;

    try {
      this._ensureDownloadComplete();

      const data = await this.pdfDocument.saveDocument(this.pdfDocument.annotationStorage);
      const blob = new Blob([data], {
        type: "application/pdf"
      });
      await this.downloadManager.download(blob, url, filename, sourceEventType);
    } catch (reason) {
      await this.download({
        sourceEventType
      });
    } finally {
      await this.pdfScriptingManager.dispatchDidSave();
      this._saveInProgress = false;
    }
  },

  downloadOrSave(options) {
    if (this.pdfDocument?.annotationStorage.size > 0) {
      this.save(options);
    } else {
      this.download(options);
    }
  },

  _delayedFallback(featureId) {
    this.externalServices.reportTelemetry({
      type: "unsupportedFeature",
      featureId
    });

    if (!this.triggerDelayedFallback) {
      this.triggerDelayedFallback = () => {
        this.fallback(featureId);
        this.triggerDelayedFallback = null;
      };
    }
  },

  fallback(featureId) {
    this.externalServices.reportTelemetry({
      type: "unsupportedFeature",
      featureId
    });

    switch (featureId) {
      case _pdf.UNSUPPORTED_FEATURES.errorFontLoadNative:
      case _pdf.UNSUPPORTED_FEATURES.errorFontMissing:
        return;
    }

    if (this.fellback) {
      return;
    }

    this.fellback = true;
    this.externalServices.fallback({
      featureId,
      url: this.baseUrl
    }).then(download => {
      if (!download) {
        return;
      }

      this.download({
        sourceEventType: "download"
      });
    });
  },

  _documentError(message, moreInfo = null) {
    this._unblockDocumentLoadEvent();

    this._otherError(message, moreInfo);
  },

  _otherError(message, moreInfo = null) {
    const moreInfoText = [this.l10n.get("error_version_info", {
      version: _pdf.version || "?",
      build: _pdf.build || "?"
    })];

    if (moreInfo) {
      moreInfoText.push(this.l10n.get("error_message", {
        message: moreInfo.message
      }));

      if (moreInfo.stack) {
        moreInfoText.push(this.l10n.get("error_stack", {
          stack: moreInfo.stack
        }));
      } else {
        if (moreInfo.filename) {
          moreInfoText.push(this.l10n.get("error_file", {
            file: moreInfo.filename
          }));
        }

        if (moreInfo.lineNumber) {
          moreInfoText.push(this.l10n.get("error_line", {
            line: moreInfo.lineNumber
          }));
        }
      }
    }

    const errorWrapperConfig = this.appConfig.errorWrapper;
    const errorWrapper = errorWrapperConfig.container;
    errorWrapper.hidden = false;
    const errorMessage = errorWrapperConfig.errorMessage;
    errorMessage.textContent = message;
    const closeButton = errorWrapperConfig.closeButton;

    closeButton.onclick = function () {
      errorWrapper.hidden = true;
    };

    const errorMoreInfo = errorWrapperConfig.errorMoreInfo;
    const moreInfoButton = errorWrapperConfig.moreInfoButton;
    const lessInfoButton = errorWrapperConfig.lessInfoButton;

    moreInfoButton.onclick = function () {
      errorMoreInfo.hidden = false;
      moreInfoButton.hidden = true;
      lessInfoButton.hidden = false;
      errorMoreInfo.style.height = errorMoreInfo.scrollHeight + "px";
    };

    lessInfoButton.onclick = function () {
      errorMoreInfo.hidden = true;
      moreInfoButton.hidden = false;
      lessInfoButton.hidden = true;
    };

    moreInfoButton.oncontextmenu = _ui_utils.noContextMenuHandler;
    lessInfoButton.oncontextmenu = _ui_utils.noContextMenuHandler;
    closeButton.oncontextmenu = _ui_utils.noContextMenuHandler;
    moreInfoButton.hidden = false;
    lessInfoButton.hidden = true;
    Promise.all(moreInfoText).then(parts => {
      errorMoreInfo.value = parts.join("\n");
    });
  },

  progress(level) {
    if (this.downloadComplete) {
      return;
    }

    const percent = Math.round(level * 100);

    if (percent > this.loadingBar.percent || isNaN(percent)) {
      this.loadingBar.percent = percent;
      const disableAutoFetch = this.pdfDocument ? this.pdfDocument.loadingParams.disableAutoFetch : _app_options.AppOptions.get("disableAutoFetch");

      if (disableAutoFetch && percent) {
        if (this.disableAutoFetchLoadingBarTimeout) {
          clearTimeout(this.disableAutoFetchLoadingBarTimeout);
          this.disableAutoFetchLoadingBarTimeout = null;
        }

        this.loadingBar.show();
        this.disableAutoFetchLoadingBarTimeout = setTimeout(() => {
          this.loadingBar.hide();
          this.disableAutoFetchLoadingBarTimeout = null;
        }, DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT);
      }
    }
  },

  load(pdfDocument) {
    this.pdfDocument = pdfDocument;
    pdfDocument.getDownloadInfo().then(({
      length
    }) => {
      this._contentLength = length;
      this.downloadComplete = true;
      this.loadingBar.hide();
      firstPagePromise.then(() => {
        this.eventBus.dispatch("documentloaded", {
          source: this
        });
      });
    });
    const pageLayoutPromise = pdfDocument.getPageLayout().catch(function () {});
    const pageModePromise = pdfDocument.getPageMode().catch(function () {});
    const openActionPromise = pdfDocument.getOpenAction().catch(function () {});
    this.toolbar.setPagesCount(pdfDocument.numPages, false);
    this.secondaryToolbar.setPagesCount(pdfDocument.numPages);
    let baseDocumentUrl;
    baseDocumentUrl = null;
    this.pdfLinkService.setDocument(pdfDocument, baseDocumentUrl);
    this.pdfDocumentProperties.setDocument(pdfDocument, this.url);
    const pdfViewer = this.pdfViewer;
    pdfViewer.setDocument(pdfDocument);
    const {
      firstPagePromise,
      onePageRendered,
      pagesPromise
    } = pdfViewer;
    const pdfThumbnailViewer = this.pdfThumbnailViewer;
    pdfThumbnailViewer.setDocument(pdfDocument);
    const storedPromise = (this.store = new _view_history.ViewHistory(pdfDocument.fingerprint)).getMultiple({
      page: null,
      zoom: _ui_utils.DEFAULT_SCALE_VALUE,
      scrollLeft: "0",
      scrollTop: "0",
      rotation: null,
      sidebarView: _ui_utils.SidebarView.UNKNOWN,
      scrollMode: _ui_utils.ScrollMode.UNKNOWN,
      spreadMode: _ui_utils.SpreadMode.UNKNOWN
    }).catch(() => {
      return Object.create(null);
    });
    firstPagePromise.then(pdfPage => {
      this.loadingBar.setWidth(this.appConfig.viewerContainer);

      this._initializeAnnotationStorageCallbacks(pdfDocument);

      Promise.all([_ui_utils.animationStarted, storedPromise, pageLayoutPromise, pageModePromise, openActionPromise]).then(async ([timeStamp, stored, pageLayout, pageMode, openAction]) => {
        const viewOnLoad = _app_options.AppOptions.get("viewOnLoad");

        this._initializePdfHistory({
          fingerprint: pdfDocument.fingerprint,
          viewOnLoad,
          initialDest: openAction?.dest
        });

        const initialBookmark = this.initialBookmark;

        const zoom = _app_options.AppOptions.get("defaultZoomValue");

        let hash = zoom ? `zoom=${zoom}` : null;
        let rotation = null;

        let sidebarView = _app_options.AppOptions.get("sidebarViewOnLoad");

        let scrollMode = _app_options.AppOptions.get("scrollModeOnLoad");

        let spreadMode = _app_options.AppOptions.get("spreadModeOnLoad");

        if (stored.page && viewOnLoad !== ViewOnLoad.INITIAL) {
          hash = `page=${stored.page}&zoom=${zoom || stored.zoom},` + `${stored.scrollLeft},${stored.scrollTop}`;
          rotation = parseInt(stored.rotation, 10);

          if (sidebarView === _ui_utils.SidebarView.UNKNOWN) {
            sidebarView = stored.sidebarView | 0;
          }

          if (scrollMode === _ui_utils.ScrollMode.UNKNOWN) {
            scrollMode = stored.scrollMode | 0;
          }

          if (spreadMode === _ui_utils.SpreadMode.UNKNOWN) {
            spreadMode = stored.spreadMode | 0;
          }
        }

        if (pageMode && sidebarView === _ui_utils.SidebarView.UNKNOWN) {
          sidebarView = (0, _ui_utils.apiPageModeToSidebarView)(pageMode);
        }

        if (pageLayout && spreadMode === _ui_utils.SpreadMode.UNKNOWN) {
          spreadMode = (0, _ui_utils.apiPageLayoutToSpreadMode)(pageLayout);
        }

        this.setInitialView(hash, {
          rotation,
          sidebarView,
          scrollMode,
          spreadMode
        });
        this.eventBus.dispatch("documentinit", {
          source: this
        });

        if (!this.isViewerEmbedded) {
          pdfViewer.focus();
        }

        this._initializePermissions(pdfDocument);

        await Promise.race([pagesPromise, new Promise(resolve => {
          setTimeout(resolve, FORCE_PAGES_LOADED_TIMEOUT);
        })]);

        if (!initialBookmark && !hash) {
          return;
        }

        if (pdfViewer.hasEqualPageSizes) {
          return;
        }

        this.initialBookmark = initialBookmark;
        pdfViewer.currentScaleValue = pdfViewer.currentScaleValue;
        this.setInitialView(hash);
      }).catch(() => {
        this.setInitialView();
      }).then(function () {
        pdfViewer.update();
      });
    });
    pagesPromise.then(() => {
      this._unblockDocumentLoadEvent();

      this._initializeAutoPrint(pdfDocument, openActionPromise);
    });
    onePageRendered.then(() => {
      pdfDocument.getOutline().then(outline => {
        this.pdfOutlineViewer.render({
          outline,
          pdfDocument
        });
      });
      pdfDocument.getAttachments().then(attachments => {
        this.pdfAttachmentViewer.render({
          attachments
        });
      });
      pdfViewer.optionalContentConfigPromise.then(optionalContentConfig => {
        this.pdfLayerViewer.render({
          optionalContentConfig,
          pdfDocument
        });
      });

      if ("requestIdleCallback" in window) {
        const callback = window.requestIdleCallback(() => {
          this._collectTelemetry(pdfDocument);

          this._idleCallbacks.delete(callback);
        }, {
          timeout: 1000
        });

        this._idleCallbacks.add(callback);
      }
    });

    this._initializePageLabels(pdfDocument);

    this._initializeMetadata(pdfDocument);
  },

  async _scriptingDocProperties(pdfDocument) {
    if (!this.documentInfo) {
      await new Promise(resolve => {
        this.eventBus._on("metadataloaded", resolve, {
          once: true
        });
      });

      if (pdfDocument !== this.pdfDocument) {
        return null;
      }
    }

    if (!this._contentLength) {
      await new Promise(resolve => {
        this.eventBus._on("documentloaded", resolve, {
          once: true
        });
      });

      if (pdfDocument !== this.pdfDocument) {
        return null;
      }
    }

    return { ...this.documentInfo,
      baseURL: this.baseUrl,
      filesize: this._contentLength,
      filename: this._docFilename,
      metadata: this.metadata?.getRaw(),
      authors: this.metadata?.get("dc:creator"),
      numPages: this.pagesCount,
      URL: this.url
    };
  },

  async _collectTelemetry(pdfDocument) {
    const markInfo = await this.pdfDocument.getMarkInfo();

    if (pdfDocument !== this.pdfDocument) {
      return;
    }

    const tagged = markInfo?.Marked || false;
    this.externalServices.reportTelemetry({
      type: "tagged",
      tagged
    });
  },

  async _initializeAutoPrint(pdfDocument, openActionPromise) {
    const [openAction, javaScript] = await Promise.all([openActionPromise, !this.pdfViewer.enableScripting ? pdfDocument.getJavaScript() : null]);

    if (pdfDocument !== this.pdfDocument) {
      return;
    }

    let triggerAutoPrint = false;

    if (openAction?.action === "Print") {
      triggerAutoPrint = true;
    }

    if (javaScript) {
      javaScript.some(js => {
        if (!js) {
          return false;
        }

        console.warn("Warning: JavaScript is not supported");

        this._delayedFallback(_pdf.UNSUPPORTED_FEATURES.javaScript);

        return true;
      });

      if (!triggerAutoPrint) {
        for (const js of javaScript) {
          if (js && _ui_utils.AutoPrintRegExp.test(js)) {
            triggerAutoPrint = true;
            break;
          }
        }
      }
    }

    if (triggerAutoPrint) {
      this.triggerPrinting();
    }
  },

  async _initializeMetadata(pdfDocument) {
    const {
      info,
      metadata,
      contentDispositionFilename,
      contentLength
    } = await pdfDocument.getMetadata();

    if (pdfDocument !== this.pdfDocument) {
      return;
    }

    this.documentInfo = info;
    this.metadata = metadata;
    this._contentDispositionFilename ?? (this._contentDispositionFilename = contentDispositionFilename);
    this._contentLength ?? (this._contentLength = contentLength);
    console.log(`PDF ${pdfDocument.fingerprint} [${info.PDFFormatVersion} ` + `${(info.Producer || "-").trim()} / ${(info.Creator || "-").trim()}] ` + `(PDF.js: ${_pdf.version || "-"}` + `${this.pdfViewer.enableWebGL ? " [WebGL]" : ""})`);
    let pdfTitle = info?.Title;
    const metadataTitle = metadata?.get("dc:title");

    if (metadataTitle) {
      if (metadataTitle !== "Untitled" && !/[\uFFF0-\uFFFF]/g.test(metadataTitle)) {
        pdfTitle = metadataTitle;
      }
    }

    if (pdfTitle) {
      this.setTitle(`${pdfTitle} - ${contentDispositionFilename || document.title}`);
    } else if (contentDispositionFilename) {
      this.setTitle(contentDispositionFilename);
    }

    if (info.IsXFAPresent && !info.IsAcroFormPresent && !pdfDocument.isPureXfa) {
      console.warn("Warning: XFA is not supported");

      this._delayedFallback(_pdf.UNSUPPORTED_FEATURES.forms);
    } else if ((info.IsAcroFormPresent || info.IsXFAPresent) && !this.pdfViewer.renderInteractiveForms) {
      console.warn("Warning: Interactive form support is not enabled");

      this._delayedFallback(_pdf.UNSUPPORTED_FEATURES.forms);
    }

    let versionId = "other";

    if (KNOWN_VERSIONS.includes(info.PDFFormatVersion)) {
      versionId = `v${info.PDFFormatVersion.replace(".", "_")}`;
    }

    let generatorId = "other";

    if (info.Producer) {
      const producer = info.Producer.toLowerCase();
      KNOWN_GENERATORS.some(function (generator) {
        if (!producer.includes(generator)) {
          return false;
        }

        generatorId = generator.replace(/[ .-]/g, "_");
        return true;
      });
    }

    let formType = null;

    if (info.IsXFAPresent) {
      formType = "xfa";
    } else if (info.IsAcroFormPresent) {
      formType = "acroform";
    }

    this.externalServices.reportTelemetry({
      type: "documentInfo",
      version: versionId,
      generator: generatorId,
      formType
    });
    this.eventBus.dispatch("metadataloaded", {
      source: this
    });
  },

  async _initializePageLabels(pdfDocument) {
    const labels = await pdfDocument.getPageLabels();

    if (pdfDocument !== this.pdfDocument) {
      return;
    }

    if (!labels || _app_options.AppOptions.get("disablePageLabels")) {
      return;
    }

    const numLabels = labels.length;

    if (numLabels !== this.pagesCount) {
      console.error("The number of Page Labels does not match the number of pages in the document.");
      return;
    }

    let i = 0;

    while (i < numLabels && labels[i] === (i + 1).toString()) {
      i++;
    }

    if (i === numLabels) {
      return;
    }

    const {
      pdfViewer,
      pdfThumbnailViewer,
      toolbar
    } = this;
    pdfViewer.setPageLabels(labels);
    pdfThumbnailViewer.setPageLabels(labels);
    toolbar.setPagesCount(numLabels, true);
    toolbar.setPageNumber(pdfViewer.currentPageNumber, pdfViewer.currentPageLabel);
  },

  _initializePdfHistory({
    fingerprint,
    viewOnLoad,
    initialDest = null
  }) {
    if (this.isViewerEmbedded || _app_options.AppOptions.get("disableHistory")) {
      return;
    }

    this.pdfHistory.initialize({
      fingerprint,
      resetHistory: viewOnLoad === ViewOnLoad.INITIAL,
      updateUrl: _app_options.AppOptions.get("historyUpdateUrl")
    });

    if (this.pdfHistory.initialBookmark) {
      this.initialBookmark = this.pdfHistory.initialBookmark;
      this.initialRotation = this.pdfHistory.initialRotation;
    }

    if (initialDest && !this.initialBookmark && viewOnLoad === ViewOnLoad.UNKNOWN) {
      this.initialBookmark = JSON.stringify(initialDest);
      this.pdfHistory.push({
        explicitDest: initialDest,
        pageNumber: null
      });
    }
  },

  async _initializePermissions(pdfDocument) {
    const permissions = await pdfDocument.getPermissions();

    if (pdfDocument !== this.pdfDocument) {
      return;
    }

    if (!permissions || !_app_options.AppOptions.get("enablePermissions")) {
      return;
    }

    if (!permissions.includes(_pdf.PermissionFlag.COPY)) {
      this.appConfig.viewerContainer.classList.add(ENABLE_PERMISSIONS_CLASS);
    }
  },

  _initializeAnnotationStorageCallbacks(pdfDocument) {
    if (pdfDocument !== this.pdfDocument) {
      return;
    }

    const {
      annotationStorage
    } = pdfDocument;

    annotationStorage.onSetModified = () => {
      window.addEventListener("beforeunload", beforeUnload);
      this._annotationStorageModified = true;
    };

    annotationStorage.onResetModified = () => {
      window.removeEventListener("beforeunload", beforeUnload);
      delete this._annotationStorageModified;
    };
  },

  setInitialView(storedHash, {
    rotation,
    sidebarView,
    scrollMode,
    spreadMode
  } = {}) {
    const setRotation = angle => {
      if ((0, _ui_utils.isValidRotation)(angle)) {
        this.pdfViewer.pagesRotation = angle;
      }
    };

    const setViewerModes = (scroll, spread) => {
      if ((0, _ui_utils.isValidScrollMode)(scroll)) {
        this.pdfViewer.scrollMode = scroll;
      }

      if ((0, _ui_utils.isValidSpreadMode)(spread)) {
        this.pdfViewer.spreadMode = spread;
      }
    };

    this.isInitialViewSet = true;
    this.pdfSidebar.setInitialView(sidebarView);
    setViewerModes(scrollMode, spreadMode);

    if (this.initialBookmark) {
      setRotation(this.initialRotation);
      delete this.initialRotation;
      this.pdfLinkService.setHash(this.initialBookmark);
      this.initialBookmark = null;
    } else if (storedHash) {
      setRotation(rotation);
      this.pdfLinkService.setHash(storedHash);
    }

    this.toolbar.setPageNumber(this.pdfViewer.currentPageNumber, this.pdfViewer.currentPageLabel);
    this.secondaryToolbar.setPageNumber(this.pdfViewer.currentPageNumber);

    if (!this.pdfViewer.currentScaleValue) {
      this.pdfViewer.currentScaleValue = _ui_utils.DEFAULT_SCALE_VALUE;
    }
  },

  _cleanup() {
    if (!this.pdfDocument) {
      return;
    }

    this.pdfViewer.cleanup();
    this.pdfThumbnailViewer.cleanup();
    this.pdfDocument.cleanup(this.pdfViewer.renderer === _ui_utils.RendererType.SVG);
  },

  forceRendering() {
    this.pdfRenderingQueue.printing = !!this.printService;
    this.pdfRenderingQueue.isThumbnailViewEnabled = this.pdfSidebar.isThumbnailViewVisible;
    this.pdfRenderingQueue.renderHighestPriority();
  },

  beforePrint() {
    this.pdfScriptingManager.dispatchWillPrint();

    if (this.printService) {
      return;
    }

    if (!this.supportsPrinting) {
      this.l10n.get("printing_not_supported").then(msg => {
        this._otherError(msg);
      });
      return;
    }

    if (!this.pdfViewer.pageViewsReady) {
      this.l10n.get("printing_not_ready").then(msg => {
        window.alert(msg);
      });
      return;
    }

    const pagesOverview = this.pdfViewer.getPagesOverview();
    const printContainer = this.appConfig.printContainer;

    const printResolution = _app_options.AppOptions.get("printResolution");

    const optionalContentConfigPromise = this.pdfViewer.optionalContentConfigPromise;
    const printService = PDFPrintServiceFactory.instance.createPrintService(this.pdfDocument, pagesOverview, printContainer, printResolution, optionalContentConfigPromise, this.l10n);
    this.printService = printService;
    this.forceRendering();
    printService.layout();
    this.externalServices.reportTelemetry({
      type: "print"
    });
  },

  afterPrint() {
    this.pdfScriptingManager.dispatchDidPrint();

    if (this.printService) {
      this.printService.destroy();
      this.printService = null;

      if (this.pdfDocument) {
        this.pdfDocument.annotationStorage.resetModified();
      }
    }

    this.forceRendering();
  },

  rotatePages(delta) {
    this.pdfViewer.pagesRotation += delta;
  },

  requestPresentationMode() {
    if (!this.pdfPresentationMode) {
      return;
    }

    this.pdfPresentationMode.request();
  },

  triggerPrinting() {
    if (!this.supportsPrinting) {
      return;
    }

    window.print();
  },

  bindEvents() {
    const {
      eventBus,
      _boundEvents
    } = this;
    _boundEvents.beforePrint = this.beforePrint.bind(this);
    _boundEvents.afterPrint = this.afterPrint.bind(this);

    eventBus._on("resize", webViewerResize);

    eventBus._on("hashchange", webViewerHashchange);

    eventBus._on("beforeprint", _boundEvents.beforePrint);

    eventBus._on("afterprint", _boundEvents.afterPrint);

    eventBus._on("pagerendered", webViewerPageRendered);

    eventBus._on("updateviewarea", webViewerUpdateViewarea);

    eventBus._on("pagechanging", webViewerPageChanging);

    eventBus._on("scalechanging", webViewerScaleChanging);

    eventBus._on("rotationchanging", webViewerRotationChanging);

    eventBus._on("sidebarviewchanged", webViewerSidebarViewChanged);

    eventBus._on("pagemode", webViewerPageMode);

    eventBus._on("namedaction", webViewerNamedAction);

    eventBus._on("presentationmodechanged", webViewerPresentationModeChanged);

    eventBus._on("presentationmode", webViewerPresentationMode);

    eventBus._on("print", webViewerPrint);

    eventBus._on("download", webViewerDownload);

    eventBus._on("save", webViewerSave);

    eventBus._on("firstpage", webViewerFirstPage);

    eventBus._on("lastpage", webViewerLastPage);

    eventBus._on("nextpage", webViewerNextPage);

    eventBus._on("previouspage", webViewerPreviousPage);

    eventBus._on("zoomin", webViewerZoomIn);

    eventBus._on("zoomout", webViewerZoomOut);

    eventBus._on("zoomreset", webViewerZoomReset);

    eventBus._on("pagenumberchanged", webViewerPageNumberChanged);

    eventBus._on("scalechanged", webViewerScaleChanged);

    eventBus._on("rotatecw", webViewerRotateCw);

    eventBus._on("rotateccw", webViewerRotateCcw);

    eventBus._on("optionalcontentconfig", webViewerOptionalContentConfig);

    eventBus._on("switchscrollmode", webViewerSwitchScrollMode);

    eventBus._on("scrollmodechanged", webViewerScrollModeChanged);

    eventBus._on("switchspreadmode", webViewerSwitchSpreadMode);

    eventBus._on("spreadmodechanged", webViewerSpreadModeChanged);

    eventBus._on("documentproperties", webViewerDocumentProperties);

    eventBus._on("find", webViewerFind);

    eventBus._on("findfromurlhash", webViewerFindFromUrlHash);

    eventBus._on("updatefindmatchescount", webViewerUpdateFindMatchesCount);

    eventBus._on("updatefindcontrolstate", webViewerUpdateFindControlState);

    if (_app_options.AppOptions.get("pdfBug")) {
      _boundEvents.reportPageStatsPDFBug = reportPageStatsPDFBug;

      eventBus._on("pagerendered", _boundEvents.reportPageStatsPDFBug);

      eventBus._on("pagechanging", _boundEvents.reportPageStatsPDFBug);
    }

    eventBus._on("fileinputchange", webViewerFileInputChange);

    eventBus._on("openfile", webViewerOpenFile);
  },

  bindWindowEvents() {
    const {
      eventBus,
      _boundEvents
    } = this;

    _boundEvents.windowResize = () => {
      eventBus.dispatch("resize", {
        source: window
      });
    };

    _boundEvents.windowHashChange = () => {
      eventBus.dispatch("hashchange", {
        source: window,
        hash: document.location.hash.substring(1)
      });
    };

    _boundEvents.windowBeforePrint = () => {
      eventBus.dispatch("beforeprint", {
        source: window
      });
    };

    _boundEvents.windowAfterPrint = () => {
      eventBus.dispatch("afterprint", {
        source: window
      });
    };

    _boundEvents.windowUpdateFromSandbox = event => {
      eventBus.dispatch("updatefromsandbox", {
        source: window,
        detail: event.detail
      });
    };

    window.addEventListener("visibilitychange", webViewerVisibilityChange);
    window.addEventListener("wheel", webViewerWheel, {
      passive: false
    });
    window.addEventListener("touchstart", webViewerTouchStart, {
      passive: false
    });
    window.addEventListener("click", webViewerClick);
    window.addEventListener("keydown", webViewerKeyDown);
    window.addEventListener("keyup", webViewerKeyUp);
    window.addEventListener("resize", _boundEvents.windowResize);
    window.addEventListener("hashchange", _boundEvents.windowHashChange);
    window.addEventListener("beforeprint", _boundEvents.windowBeforePrint);
    window.addEventListener("afterprint", _boundEvents.windowAfterPrint);
    window.addEventListener("updatefromsandbox", _boundEvents.windowUpdateFromSandbox);
  },

  unbindEvents() {
    const {
      eventBus,
      _boundEvents
    } = this;

    eventBus._off("resize", webViewerResize);

    eventBus._off("hashchange", webViewerHashchange);

    eventBus._off("beforeprint", _boundEvents.beforePrint);

    eventBus._off("afterprint", _boundEvents.afterPrint);

    eventBus._off("pagerendered", webViewerPageRendered);

    eventBus._off("updateviewarea", webViewerUpdateViewarea);

    eventBus._off("pagechanging", webViewerPageChanging);

    eventBus._off("scalechanging", webViewerScaleChanging);

    eventBus._off("rotationchanging", webViewerRotationChanging);

    eventBus._off("sidebarviewchanged", webViewerSidebarViewChanged);

    eventBus._off("pagemode", webViewerPageMode);

    eventBus._off("namedaction", webViewerNamedAction);

    eventBus._off("presentationmodechanged", webViewerPresentationModeChanged);

    eventBus._off("presentationmode", webViewerPresentationMode);

    eventBus._off("print", webViewer