pdfjs-dist/lib/web/app.js

/**
 * @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,
  _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 ("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 || [];
      const mediaMatcher = "prefers-color-scheme";
      const mediaRule = `(${mediaMatcher}: dark)`;
      const mediaRegex = new RegExp(`^@media \\(${mediaMatcher}: dark\\) {\\n\\s*([\\w\\s-.,:;/\\\\{}()]+)\\n}$`);

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

        if (rule instanceof CSSMediaRule && rule.media?.[0] === mediaRule) {
          if (cssTheme === ViewerCssTheme.LIGHT) {
            styleSheet.deleteRule(i);
            return;
          }

          const darkRules = mediaRegex.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"),
      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.pdfLinkService.externalLinkEnabled = true;
    this._fellback = false;
    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._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();
      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);
    }
  },

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

    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.fingerprints[0])).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.fingerprints[0],
          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 => {
        if (pdfDocument !== this.pdfDocument) {
          return;
        }

        this.pdfOutlineViewer.render({
          outline,
          pdfDocument
        });
      });
      pdfDocument.getAttachments().then(attachments => {
        if (pdfDocument !== this.pdfDocument) {
          return;
        }

        this.pdfAttachmentViewer.render({
          attachments
        });
      });
      pdfViewer.optionalContentConfigPromise.then(optionalContentConfig => {
        if (pdfDocument !== this.pdfDocument) {
          return;
        }

        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 support is not enabled");
        this.fallback(_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 ${pdfDocument.fingerprints[0]} [${info.PDFFormatVersion} ` + `${(info.Producer || "-").trim()} / ${(info.Creator || "-").trim()}] ` + `(PDF.js: ${_pdf.version || "-"})`);
    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 support is not enabled");
      this.fallback(_pdf.UNSUPPORTED_FEATURES.forms);
    } else if ((info.IsAcroFormPresent || info.IsXFAPresent) && !this.pdfViewer.renderInteractiveForms) {
      console.warn("Warning: Interactive form support is not enabled");
      this.fallback(_pdf.UNSUPPORTED_FEATURES.forms);
    }

    if (info.IsSignaturesPresent) {
      console.warn("Warning: Digital signatures validation is not supported");
      this.fallback(_pdf.UNSUPPORTED_FEATURES.signatures);
    }

    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("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", webViewerPrint);

    eventBus._off("download", webViewerDownload);

    eventBus._off("save", webViewerSave);

    eventBus._off("firstpage", webViewerFirstPage);

    eventBus._off("lastpage", webViewerLastPage);

    eventBus._off("nextpage", webViewerNextPage);

    eventBus._off("previouspage", webViewerPreviousPage);

    eventBus._off("zoomin", webViewerZoomIn);

    eventBus._off("zoomout", webViewerZoomOut);

    eventBus._off("zoomreset", webViewerZoomReset);

    eventBus._off("pagenumberchanged", webViewerPageNumberChanged);

    eventBus._off("scalechanged", webViewerScaleChanged);

    eventBus._off("rotatecw", webViewerRotateCw);

    eventBus._off("rotateccw", webViewerRotateCcw);

    eventBus._off("optionalcontentconfig", webViewerOptionalContentConfig);

    eventBus._off("switchscrollmode", webViewerSwitchScrollMode);

    eventBus._off("scrollmodechanged", webViewerScrollModeChanged);

    eventBus._off("switchspreadmode", webViewerSwitchSpreadMode);

    eventBus._off("spreadmodechanged", webViewerSpreadModeChanged);

    eventBus._off("documentproperties", webViewerDocumentProperties);

    eventBus._off("find", webViewerFind);

    eventBus._off("findfromurlhash", webViewerFindFromUrlHash);

    eventBus._off("updatefindmatchescount", webViewerUpdateFindMatchesCount);

    eventBus._off("updatefindcontrolstate", webViewerUpdateFindControlState);

    if (_boundEvents.reportPageStatsPDFBug) {
      eventBus._off("pagerendered", _boundEvents.reportPageStatsPDFBug);

      eventBus._off("pagechanging", _boundEvents.reportPageStatsPDFBug);

      _boundEvents.reportPageStatsPDFBug = null;
    }

    eventBus._off("fileinputchange", webViewerFileInputChange);

    eventBus._off("openfile", webViewerOpenFile);

    _boundEvents.beforePrint = null;
    _boundEvents.afterPrint = null;
  },

  unbindWindowEvents() {
    const {
      _boundEvents
    } = this;
    window.removeEventListener("visibilitychange", webViewerVisibilityChange);
    window.removeEventListener("wheel", webViewerWheel, {
      passive: false
    });
    window.removeEventListener("touchstart", webViewerTouchStart, {
      passive: false
    });
    window.removeEventListener("click", webViewerClick);
    window.removeEventListener("keydown", webViewerKeyDown);
    window.removeEventListener("resize", _boundEvents.windowResize);
    window.removeEventListener("hashchange", _boundEvents.windowHashChange);
    window.removeEventListener("beforeprint", _boundEvents.windowBeforePrint);
    window.removeEventListener("afterprint", _boundEvents.windowAfterPrint);
    window.removeEventListener("updatefromsandbox", _boundEvents.windowUpdateFromSandbox);
    _boundEvents.windowResize = null;
    _boundEvents.windowHashChange = null;
    _boundEvents.windowBeforePrint = null;
    _boundEvents.windowAfterPrint = null;
    _boundEvents.windowUpdateFromSandbox = null;
  },

  accumulateWheelTicks(ticks) {
    if (this._wheelUnusedTicks > 0 && ticks < 0 || this._wheelUnusedTicks < 0 && ticks > 0) {
      this._wheelUnusedTicks = 0;
    }

    this._wheelUnusedTicks += ticks;
    const wholeTicks = Math.sign(this._wheelUnusedTicks) * Math.floor(Math.abs(this._wheelUnusedTicks));
    this._wheelUnusedTicks -= wholeTicks;
    return wholeTicks;
  },

  _unblockDocumentLoadEvent() {
    if (document.blockUnblockOnload) {
      document.blockUnblockOnload(false);
    }

    this._unblockDocumentLoadEvent = () => {};
  },

  get scriptingReady() {
    return this.pdfScriptingManager.ready;
  }

};
exports.PDFViewerApplication = PDFViewerApplication;
let validateFileURL;
{
  const HOSTED_VIEWER_ORIGINS = ["null", "http://mozilla.github.io", "https://mozilla.github.io"];

  validateFileURL = function (file) {
    if (file === undefined) {
      return;
    }

    try {
      const viewerOrigin = new URL(window.location.href).origin || "null";

      if (HOSTED_VIEWER_ORIGINS.includes(viewerOrigin)) {
        return;
      }

      const {
        origin,
        protocol
      } = new URL(file, window.location.href);

      if (origin !== viewerOrigin && protocol !== "blob:") {
        throw new Error("file origin does not match viewer's");
      }
    } catch (ex) {
      PDFViewerApplication.l10n.get("loading_error").then(msg => {
        PDFViewerApplication._documentError(msg, {
          message: ex?.message
        });
      });
      throw ex;
    }
  };
}

async function loadFakeWorker() {
  if (!_pdf.GlobalWorkerOptions.workerSrc) {
    _pdf.GlobalWorkerOptions.workerSrc = _app_options.AppOptions.get("workerSrc");
  }

  return (0, _pdf.loadScript)(_pdf.PDFWorker.getWorkerSrc());
}

function loadAndEnablePDFBug(enabledTabs) {
  const appConfig = PDFViewerApplication.appConfig;
  return (0, _pdf.loadScript)(appConfig.debuggerScriptPath).then(function () {
    PDFBug.enable(enabledTabs);
    PDFBug.init({
      OPS: _pdf.OPS
    }, appConfig.mainContainer);
  });
}

function reportPageStatsPDFBug({
  pageNumber
}) {
  if (typeof Stats === "undefined" || !Stats.enabled) {
    return;
  }

  const pageView = PDFViewerApplication.pdfViewer.getPageView(pageNumber - 1);
  const pageStats = pageView?.pdfPage?.stats;

  if (!pageStats) {
    return;
  }

  Stats.add(pageNumber, pageStats);
}

function webViewerInitialized() {
  const appConfig = PDFViewerApplication.appConfig;
  let file;
  const queryString = document.location.search.substring(1);
  const params = (0, _ui_utils.parseQueryString)(queryString);
  file = "file" in params ? params.file : _app_options.AppOptions.get("defaultUrl");
  validateFileURL(file);
  const fileInput = document.createElement("input");
  fileInput.id = appConfig.openFileInputName;
  fileInput.className = "fileInput";
  fileInput.setAttribute("type", "file");
  fileInput.oncontextmenu = _ui_utils.noContextMenuHandler;
  document.body.appendChild(fileInput);

  if (!window.File || !window.FileReader || !window.FileList || !window.Blob) {
    appConfig.toolbar.openFile.hidden = true;
    appConfig.secondaryToolbar.openFileButton.hidden = true;
  } else {
    fileInput.value = null;
  }

  fileInput.addEventListener("change", function (evt) {
    const files = evt.target.files;

    if (!files || files.length === 0) {
      return;
    }

    PDFViewerApplication.eventBus.dispatch("fileinputchange", {
      source: this,
      fileInput: evt.target
    });
  });
  appConfig.mainContainer.addEventListener("dragover", function (evt) {
    evt.preventDefault();
    evt.dataTransfer.dropEffect = "move";
  });
  appConfig.mainContainer.addEventListener("drop", function (evt) {
    evt.preventDefault();
    const files = evt.dataTransfer.files;

    if (!files || files.length === 0) {
      return;
    }

    PDFViewerApplication.eventBus.dispatch("fileinputchange", {
      source: this,
      fileInput: evt.dataTransfer
    });
  });

  if (!PDFViewerApplication.supportsDocumentFonts) {
    _app_options.AppOptions.set("disableFontFace", true);

    PDFViewerApplication.l10n.get("web_fonts_disabled").then(msg => {
      console.warn(msg);
    });
  }

  if (!PDFViewerApplication.supportsPrinting) {
    appConfig.toolbar.print.classList.add("hidden");
    appConfig.secondaryToolbar.printButton.classList.add("hidden");
  }

  if (!PDFViewerApplication.supportsFullscreen) {
    appConfig.toolbar.presentationModeButton.classList.add("hidden");
    appConfig.secondaryToolbar.presentationModeButton.classList.add("hidden");
  }

  if (PDFViewerApplication.supportsIntegratedFind) {
    appConfig.toolbar.viewFind.classList.add("hidden");
  }

  appConfig.mainContainer.addEventListener("transitionend", function (evt) {
    if (evt.target === this) {
      PDFViewerApplication.eventBus.dispatch("resize", {
        source: this
      });
    }
  }, true);

  try {
    webViewerOpenFileViaURL(file);
  } catch (reason) {
    PDFViewerApplication.l10n.get("loading_error").then(msg => {
      PDFViewerApplication._documentError(msg, reason);
    });
  }
}

function webViewerOpenFileViaURL(file) {
  if (file) {
    PDFViewerApplication.open(file);
  }
}

function webViewerResetPermissions() {
  const {
    appConfig
  } = PDFViewerApplication;

  if (!appConfig) {
    return;
  }

  appConfig.viewerContainer.classList.remove(ENABLE_PERMISSIONS_CLASS);
}

function webViewerPageRendered({
  pageNumber,
  timestamp,
  error
}) {
  if (pageNumber === PDFViewerApplication.page) {
    PDFViewerApplication.toolbar.updateLoadingIndicatorState(false);
  }

  if (PDFViewerApplication.pdfSidebar.isThumbnailViewVisible) {
    const pageView = PDFViewerApplication.pdfViewer.getPageView(pageNumber - 1);
    const thumbnailView = PDFViewerApplication.pdfThumbnailViewer.getThumbnail(pageNumber - 1);

    if (pageView && thumbnailView) {
      thumbnailView.setImage(pageView);
    }
  }

  if (error) {
    PDFViewerApplication.l10n.get("rendering_error").then(msg => {
      PDFViewerApplication._otherError(msg, error);
    });
  }

  PDFViewerApplication.externalServices.reportTelemetry({
    type: "pageInfo",
    timestamp
  });
  PDFViewerApplication.pdfDocument.getStats().then(function (stats) {
    PDFViewerApplication.externalServices.reportTelemetry({
      type: "documentStats",
      stats
    });
  });
}

function webViewerPageMode({
  mode
}) {
  let view;

  switch (mode) {
    case "thumbs":
      view = _ui_utils.SidebarView.THUMBS;
      break;

    case "bookmarks":
    case "outline":
      view = _ui_utils.SidebarView.OUTLINE;
      break;

    case "attachments":
      view = _ui_utils.SidebarView.ATTACHMENTS;
      break;

    case "layers":
      view = _ui_utils.SidebarView.LAYERS;
      break;

    case "none":
      view = _ui_utils.SidebarView.NONE;
      break;

    default:
      console.error('Invalid "pagemode" hash parameter: ' + mode);
      return;
  }

  PDFViewerApplication.pdfSidebar.switchView(view, true);
}

function webViewerNamedAction(evt) {
  switch (evt.action) {
    case "GoToPage":
      PDFViewerApplication.appConfig.toolbar.pageNumber.select();
      break;

    case "Find":
      if (!PDFViewerApplication.supportsIntegratedFind) {
        PDFViewerApplication.findBar.toggle();
      }

      break;

    case "Print":
      PDFViewerApplication.triggerPrinting();
      break;

    case "SaveAs":
      webViewerSave();
      break;
  }
}

function webViewerPresentationModeChanged(evt) {
  PDFViewerApplication.pdfViewer.presentationModeState = evt.state;
}

function webViewerSidebarViewChanged(evt) {
  PDFViewerApplication.pdfRenderingQueue.isThumbnailViewEnabled = PDFViewerApplication.pdfSidebar.isThumbnailViewVisible;
  const store = PDFViewerApplication.store;

  if (store && PDFViewerApplication.isInitialViewSet) {
    store.set("sidebarView", evt.view).catch(function () {});
  }
}

function webViewerUpdateViewarea(evt) {
  const location = evt.location,
        store = PDFViewerApplication.store;

  if (store && PDFViewerApplication.isInitialViewSet) {
    store.setMultiple({
      page: location.pageNumber,
      zoom: location.scale,
      scrollLeft: location.left,
      scrollTop: location.top,
      rotation: location.rotation
    }).catch(function () {});
  }

  const href = PDFViewerApplication.pdfLinkService.getAnchorUrl(location.pdfOpenParams);
  PDFViewerApplication.appConfig.toolbar.viewBookmark.href = href;
  PDFViewerApplication.appConfig.secondaryToolbar.viewBookmarkButton.href = href;
  const currentPage = PDFViewerApplication.pdfViewer.getPageView(PDFViewerApplication.page - 1);
  const loading = currentPage?.renderingState !== _pdf_rendering_queue.RenderingStates.FINISHED;
  PDFViewerApplication.toolbar.updateLoadingIndicatorState(loading);
}

function webViewerScrollModeChanged(evt) {
  const store = PDFViewerApplication.store;

  if (store && PDFViewerApplication.isInitialViewSet) {
    store.set("scrollMode", evt.mode).catch(function () {});
  }
}

function webViewerSpreadModeChanged(evt) {
  const store = PDFViewerApplication.store;

  if (store && PDFViewerApplication.isInitialViewSet) {
    store.set("spreadMode", evt.mode).catch(function () {});
  }
}

function webViewerResize() {
  const {
    pdfDocument,
    pdfViewer
  } = PDFViewerApplication;

  if (!pdfDocument) {
    return;
  }

  const currentScaleValue = pdfViewer.currentScaleValue;

  if (currentScaleValue === "auto" || currentScaleValue === "page-fit" || currentScaleValue === "page-width") {
    pdfViewer.currentScaleValue = currentScaleValue;
  }

  pdfViewer.update();
}

function webViewerHashchange(evt) {
  const hash = evt.hash;

  if (!hash) {
    return;
  }

  if (!PDFViewerApplication.isInitialViewSet) {
    PDFViewerApplication.initialBookmark = hash;
  } else if (!PDFViewerApplication.pdfHistory.popStateInProgress) {
    PDFViewerApplication.pdfLinkService.setHash(hash);
  }
}

let webViewerFileInputChange, webViewerOpenFile;
{
  webViewerFileInputChange = function (evt) {
    if (PDFViewerApplication.pdfViewer?.isInPresentationMode) {
      return;
    }

    const file = evt.fileInput.files[0];

    if (!_viewer_compatibility.viewerCompatibilityParams.disableCreateObjectURL) {
      let url = URL.createObjectURL(file);

      if (file.name) {
        url = {
          url,
          originalUrl: file.name
        };
      }

      PDFViewerApplication.open(url);
    } else {
      PDFViewerApplication.setTitleUsingUrl(file.name);
      const fileReader = new FileReader();

      fileReader.onload = function webViewerChangeFileReaderOnload(event) {
        const buffer = event.target.result;
        PDFViewerApplication.open(new Uint8Array(buffer));
      };

      fileReader.readAsArrayBuffer(file);
    }

    const appConfig = PDFViewerApplication.appConfig;
    appConfig.toolbar.viewBookmark.hidden = true;
    appConfig.secondaryToolbar.viewBookmarkButton.hidden = true;
    appConfig.toolbar.download.hidden = true;
    appConfig.secondaryToolbar.downloadButton.hidden = true;
  };

  webViewerOpenFile = function (evt) {
    const openFileInputName = PDFViewerApplication.appConfig.openFileInputName;
    document.getElementById(openFileInputName).click();
  };
}

function webViewerPresentationMode() {
  PDFViewerApplication.requestPresentationMode();
}

function webViewerPrint() {
  PDFViewerApplication.triggerPrinting();
}

function webViewerDownload() {
  PDFViewerApplication.downloadOrSave({
    sourceEventType: "download"
  });
}

function webViewerSave() {
  PDFViewerApplication.downloadOrSave({
    sourceEventType: "save"
  });
}

function webViewerFirstPage() {
  if (PDFViewerApplication.pdfDocument) {
    PDFViewerApplication.page = 1;
  }
}

function webViewerLastPage() {
  if (PDFViewerApplication.pdfDocument) {
    PDFViewerApplication.page = PDFViewerApplication.pagesCount;
  }
}

function webViewerNextPage() {
  PDFViewerApplication.pdfViewer.nextPage();
}

function webViewerPreviousPage() {
  PDFViewerApplication.pdfViewer.previousPage();
}

function webViewerZoomIn() {
  PDFViewerApplication.zoomIn();
}

function webViewerZoomOut() {
  PDFViewerApplication.zoomOut();
}

function webViewerZoomReset() {
  PDFViewerApplication.zoomReset();
}

function webViewerPageNumberChanged(evt) {
  const pdfViewer = PDFViewerApplication.pdfViewer;

  if (evt.value !== "") {
    PDFViewerApplication.pdfLinkService.goToPage(evt.value);
  }

  if (evt.value !== pdfViewer.currentPageNumber.toString() && evt.value !== pdfViewer.currentPageLabel) {
    PDFViewerApplication.toolbar.setPageNumber(pdfViewer.currentPageNumber, pdfViewer.currentPageLabel);
  }
}

function webViewerScaleChanged(evt) {
  PDFViewerApplication.pdfViewer.currentScaleValue = evt.value;
}

function webViewerRotateCw() {
  PDFViewerApplication.rotatePages(90);
}

function webViewerRotateCcw() {
  PDFViewerApplication.rotatePages(-90);
}

function webViewerOptionalContentConfig(evt) {
  PDFViewerApplication.pdfViewer.optionalContentConfigPromise = evt.promise;
}

function webViewerSwitchScrollMode(evt) {
  PDFViewerApplication.pdfViewer.scrollMode = evt.mode;
}

function webViewerSwitchSpreadMode(evt) {
  PDFViewerApplication.pdfViewer.spreadMode = evt.mode;
}

function webViewerDocumentProperties() {
  PDFViewerApplication.pdfDocumentProperties.open();
}

function webViewerFind(evt) {
  PDFViewerApplication.findController.executeCommand("find" + evt.type, {
    query: evt.query,
    phraseSearch: evt.phraseSearch,
    caseSensitive: evt.caseSensitive,
    entireWord: evt.entireWord,
    highlightAll: evt.highlightAll,
    findPrevious: evt.findPrevious
  });
}

function webViewerFindFromUrlHash(evt) {
  PDFViewerApplication.findController.executeCommand("find", {
    query: evt.query,
    phraseSearch: evt.phraseSearch,
    caseSensitive: false,
    entireWord: false,
    highlightAll: true,
    findPrevious: false
  });
}

function webViewerUpdateFindMatchesCount({
  matchesCount
}) {
  if (PDFViewerApplication.supportsIntegratedFind) {
    PDFViewerApplication.externalServices.updateFindMatchesCount(matchesCount);
  } else {
    PDFViewerApplication.findBar.updateResultsCount(matchesCount);
  }
}

function webViewerUpdateFindControlState({
  state,
  previous,
  matchesCount,
  rawQuery
}) {
  if (PDFViewerApplication.supportsIntegratedFind) {
    PDFViewerApplication.externalServices.updateFindControlState({
      result: state,
      findPrevious: previous,
      matchesCount,
      rawQuery
    });
  } else {
    PDFViewerApplication.findBar.updateUIState(state, previous, matchesCount);
  }
}

function webViewerScaleChanging(evt) {
  PDFViewerApplication.toolbar.setPageScale(evt.presetValue, evt.scale);
  PDFViewerApplication.pdfViewer.update();
}

function webViewerRotationChanging(evt) {
  PDFViewerApplication.pdfThumbnailViewer.pagesRotation = evt.pagesRotation;
  PDFViewerApplication.forceRendering();
  PDFViewerApplication.pdfViewer.currentPageNumber = evt.pageNumber;
}

function webViewerPageChanging({
  pageNumber,
  pageLabel
}) {
  PDFViewerApplication.toolbar.setPageNumber(pageNumber, pageLabel);
  PDFViewerApplication.secondaryToolbar.setPageNumber(pageNumber);

  if (PDFViewerApplication.pdfSidebar.isThumbnailViewVisible) {
    PDFViewerApplication.pdfThumbnailViewer.scrollThumbnailIntoView(pageNumber);
  }
}

function webViewerVisibilityChange(evt) {
  if (document.visibilityState === "visible") {
    setZoomDisabledTimeout();
  }
}

let zoomDisabledTimeout = null;

function setZoomDisabledTimeout() {
  if (zoomDisabledTimeout) {
    clearTimeout(zoomDisabledTimeout);
  }

  zoomDisabledTimeout = setTimeout(function () {
    zoomDisabledTimeout = null;
  }, WHEEL_ZOOM_DISABLED_TIMEOUT);
}

function webViewerWheel(evt) {
  const {
    pdfViewer,
    supportedMouseWheelZoomModifierKeys
  } = PDFViewerApplication;

  if (pdfViewer.isInPresentationMode) {
    return;
  }

  if (evt.ctrlKey && supportedMouseWheelZoomModifierKeys.ctrlKey || evt.metaKey && supportedMouseWheelZoomModifierKeys.metaKey) {
    evt.preventDefault();

    if (zoomDisabledTimeout || document.visibilityState === "hidden") {
      return;
    }

    const previousScale = pdfViewer.currentScale;
    const delta = (0, _ui_utils.normalizeWheelEventDirection)(evt);
    let ticks = 0;

    if (evt.deltaMode === WheelEvent.DOM_DELTA_LINE || evt.deltaMode === WheelEvent.DOM_DELTA_PAGE) {
      if (Math.abs(delta) >= 1) {
        ticks = Math.sign(delta);
      } else {
        ticks = PDFViewerApplication.accumulateWheelTicks(delta);
      }
    } else {
      const PIXELS_PER_LINE_SCALE = 30;
      ticks = PDFViewerApplication.accumulateWheelTicks(delta / PIXELS_PER_LINE_SCALE);
    }

    if (ticks < 0) {
      PDFViewerApplication.zoomOut(-ticks);
    } else if (ticks > 0) {
      PDFViewerApplication.zoomIn(ticks);
    }

    const currentScale = pdfViewer.currentScale;

    if (previousScale !== currentScale) {
      const scaleCorrectionFactor = currentScale / previousScale - 1;
      const rect = pdfViewer.container.getBoundingClientRect();
      const dx = evt.clientX - rect.left;
      const dy = evt.clientY - rect.top;
      pdfViewer.container.scrollLeft += dx * scaleCorrectionFactor;
      pdfViewer.container.scrollTop += dy * scaleCorrectionFactor;
    }
  } else {
    setZoomDisabledTimeout();
  }
}

function webViewerTouchStart(evt) {
  if (evt.touches.length > 1) {
    evt.preventDefault();
  }
}

function webViewerClick(evt) {
  if (!PDFViewerApplication.secondaryToolbar.isOpen) {
    return;
  }

  const appConfig = PDFViewerApplication.appConfig;

  if (PDFViewerApplication.pdfViewer.containsElement(evt.target) || appConfig.toolbar.container.contains(evt.target) && evt.target !== appConfig.secondaryToolbar.toggleButton) {
    PDFViewerApplication.secondaryToolbar.close();
  }
}

function webViewerKeyDown(evt) {
  if (PDFViewerApplication.overlayManager.active) {
    return;
  }

  let handled = false,
      ensureViewerFocused = false;
  const cmd = (evt.ctrlKey ? 1 : 0) | (evt.altKey ? 2 : 0) | (evt.shiftKey ? 4 : 0) | (evt.metaKey ? 8 : 0);
  const pdfViewer = PDFViewerApplication.pdfViewer;
  const isViewerInPresentationMode = pdfViewer?.isInPresentationMode;

  if (cmd === 1 || cmd === 8 || cmd === 5 || cmd === 12) {
    switch (evt.keyCode) {
      case 70:
        if (!PDFViewerApplication.supportsIntegratedFind && !evt.shiftKey) {
          PDFViewerApplication.findBar.open();
          handled = true;
        }

        break;

      case 71:
        if (!PDFViewerApplication.supportsIntegratedFind) {
          const findState = PDFViewerApplication.findController.state;

          if (findState) {
            PDFViewerApplication.findController.executeCommand("findagain", {
              query: findState.query,
              phraseSearch: findState.phraseSearch,
              caseSensitive: findState.caseSensitive,
              entireWord: findState.entireWord,
              highlightAll: findState.highlightAll,
              findPrevious: cmd === 5 || cmd === 12
            });
          }

          handled = true;
        }

        break;

      case 61:
      case 107:
      case 187:
      case 171:
        if (!isViewerInPresentationMode) {
          PDFViewerApplication.zoomIn();
        }

        handled = true;
        break;

      case 173:
      case 109:
      case 189:
        if (!isViewerInPresentationMode) {
          PDFViewerApplication.zoomOut();
        }

        handled = true;
        break;

      case 48:
      case 96:
        if (!isViewerInPresentationMode) {
          setTimeout(function () {
            PDFViewerApplication.zoomReset();
          });
          handled = false;
        }

        break;

      case 38:
        if (isViewerInPresentationMode || PDFViewerApplication.page > 1) {
          PDFViewerApplication.page = 1;
          handled = true;
          ensureViewerFocused = true;
        }

        break;

      case 40:
        if (isViewerInPresentationMode || PDFViewerApplication.page < PDFViewerApplication.pagesCount) {
          PDFViewerApplication.page = PDFViewerApplication.pagesCount;
          handled = true;
          ensureViewerFocused = true;
        }

        break;
    }
  }

  const {
    eventBus
  } = PDFViewerApplication;

  if (cmd === 1 || cmd === 8) {
    switch (evt.keyCode) {
      case 83:
        eventBus.dispatch("download", {
          source: window
        });
        handled = true;
        break;

      case 79:
        {
          eventBus.dispatch("openfile", {
            source: window
          });
          handled = true;
        }
        break;
    }
  }

  if (cmd === 3 || cmd === 10) {
    switch (evt.keyCode) {
      case 80:
        PDFViewerApplication.requestPresentationMode();
        handled = true;
        break;

      case 71:
        PDFViewerApplication.appConfig.toolbar.pageNumber.select();
        handled = true;
        break;
    }
  }

  if (handled) {
    if (ensureViewerFocused && !isViewerInPresentationMode) {
      pdfViewer.focus();
    }

    evt.preventDefault();
    return;
  }

  const curElement = (0, _ui_utils.getActiveOrFocusedElement)();
  const curElementTagName = curElement?.tagName.toUpperCase();

  if (curElementTagName === "INPUT" || curElementTagName === "TEXTAREA" || curElementTagName === "SELECT" || curElement?.isContentEditable) {
    if (evt.keyCode !== 27) {
      return;
    }
  }

  if (cmd === 0) {
    let turnPage = 0,
        turnOnlyIfPageFit = false;

    switch (evt.keyCode) {
      case 38:
      case 33:
        if (pdfViewer.isVerticalScrollbarEnabled) {
          turnOnlyIfPageFit = true;
        }

        turnPage = -1;
        break;

      case 8:
        if (!isViewerInPresentationMode) {
          turnOnlyIfPageFit = true;
        }

        turnPage = -1;
        break;

      case 37:
        if (pdfViewer.isHorizontalScrollbarEnabled) {
          turnOnlyIfPageFit = true;
        }

      case 75:
      case 80:
        turnPage = -1;
        break;

      case 27:
        if (PDFViewerApplication.secondaryToolbar.isOpen) {
          PDFViewerApplication.secondaryToolbar.close();
          handled = true;
        }

        if (!PDFViewerApplication.supportsIntegratedFind && PDFViewerApplication.findBar.opened) {
          PDFViewerApplication.findBar.close();
          handled = true;
        }

        break;

      case 40:
      case 34:
        if (pdfViewer.isVerticalScrollbarEnabled) {
          turnOnlyIfPageFit = true;
        }

        turnPage = 1;
        break;

      case 13:
      case 32:
        if (!isViewerInPresentationMode) {
          turnOnlyIfPageFit = true;
        }

        turnPage = 1;
        break;

      case 39:
        if (pdfViewer.isHorizontalScrollbarEnabled) {
          turnOnlyIfPageFit = true;
        }

      case 74:
      case 78:
        turnPage = 1;
        break;

      case 36:
        if (isViewerInPresentationMode || PDFViewerApplication.page > 1) {
          PDFViewerApplication.page = 1;
          handled = true;
          ensureViewerFocused = true;
        }

        break;

      case 35:
        if (isViewerInPresentationMode || PDFViewerApplication.page < PDFViewerApplication.pagesCount) {
          PDFViewerApplication.page = PDFViewerApplication.pagesCount;
          handled = true;
          ensureViewerFocused = true;
        }

        break;

      case 83:
        PDFViewerApplication.pdfCursorTools.switchTool(_pdf_cursor_tools.CursorTool.SELECT);
        break;

      case 72:
        PDFViewerApplication.pdfCursorTools.switchTool(_pdf_cursor_tools.CursorTool.HAND);
        break;

      case 82:
        PDFViewerApplication.rotatePages(90);
        break;

      case 115:
        PDFViewerApplication.pdfSidebar.toggle();
        break;
    }

    if (turnPage !== 0 && (!turnOnlyIfPageFit || pdfViewer.currentScaleValue === "page-fit")) {
      if (turnPage > 0) {
        pdfViewer.nextPage();
      } else {
        pdfViewer.previousPage();
      }

      handled = true;
    }
  }

  if (cmd === 4) {
    switch (evt.keyCode) {
      case 13:
      case 32:
        if (!isViewerInPresentationMode && pdfViewer.currentScaleValue !== "page-fit") {
          break;
        }

        if (PDFViewerApplication.page > 1) {
          PDFViewerApplication.page--;
        }

        handled = true;
        break;

      case 82:
        PDFViewerApplication.rotatePages(-90);
        break;
    }
  }

  if (!handled && !isViewerInPresentationMode) {
    if (evt.keyCode >= 33 && evt.keyCode <= 40 || evt.keyCode === 32 && curElementTagName !== "BUTTON") {
      ensureViewerFocused = true;
    }
  }

  if (ensureViewerFocused && !pdfViewer.containsElement(curElement)) {
    pdfViewer.focus();
  }

  if (handled) {
    evt.preventDefault();
  }
}

function beforeUnload(evt) {
  evt.preventDefault();
  evt.returnValue = "";
  return false;
}

const PDFPrintServiceFactory = {
  instance: {
    supportsPrinting: false,

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

  }
};
exports.PDFPrintServiceFactory = PDFPrintServiceFactory;