ngx-extended-pdf-viewer/assets/viewer.js

Embedding PDF files in your Angular application. Highly configurable viewer including the toolbar, sidebar, and all the features you're used to.

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2020 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
 */

/******/ (function(modules) { // webpackBootstrap
/******/ 	// The module cache
/******/ 	var installedModules = {};
/******/
/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {
/******/
/******/ 		// Check if module is in cache
/******/ 		if(installedModules[moduleId]) {
/******/ 			return installedModules[moduleId].exports;
/******/ 		}
/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			i: moduleId,
/******/ 			l: false,
/******/ 			exports: {}
/******/ 		};
/******/
/******/ 		// Execute the module function
/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/
/******/ 		// Flag the module as loaded
/******/ 		module.l = true;
/******/
/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}
/******/
/******/
/******/ 	// expose the modules object (__webpack_modules__)
/******/ 	__webpack_require__.m = modules;
/******/
/******/ 	// expose the module cache
/******/ 	__webpack_require__.c = installedModules;
/******/
/******/ 	// define getter function for harmony exports
/******/ 	__webpack_require__.d = function(exports, name, getter) {
/******/ 		if(!__webpack_require__.o(exports, name)) {
/******/ 			Object.defineProperty(exports, name, { enumerable: true, get: getter });
/******/ 		}
/******/ 	};
/******/
/******/ 	// define __esModule on exports
/******/ 	__webpack_require__.r = function(exports) {
/******/ 		if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ 			Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ 		}
/******/ 		Object.defineProperty(exports, '__esModule', { value: true });
/******/ 	};
/******/
/******/ 	// create a fake namespace object
/******/ 	// mode & 1: value is a module id, require it
/******/ 	// mode & 2: merge all properties of value into the ns
/******/ 	// mode & 4: return value when already ns object
/******/ 	// mode & 8|1: behave like require
/******/ 	__webpack_require__.t = function(value, mode) {
/******/ 		if(mode & 1) value = __webpack_require__(value);
/******/ 		if(mode & 8) return value;
/******/ 		if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
/******/ 		var ns = Object.create(null);
/******/ 		__webpack_require__.r(ns);
/******/ 		Object.defineProperty(ns, 'default', { enumerable: true, value: value });
/******/ 		if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
/******/ 		return ns;
/******/ 	};
/******/
/******/ 	// getDefaultExport function for compatibility with non-harmony modules
/******/ 	__webpack_require__.n = function(module) {
/******/ 		var getter = module && module.__esModule ?
/******/ 			function getDefault() { return module['default']; } :
/******/ 			function getModuleExports() { return module; };
/******/ 		__webpack_require__.d(getter, 'a', getter);
/******/ 		return getter;
/******/ 	};
/******/
/******/ 	// Object.prototype.hasOwnProperty.call
/******/ 	__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
/******/
/******/ 	// __webpack_public_path__
/******/ 	__webpack_require__.p = "";
/******/
/******/
/******/ 	// Load entry module and return exports
/******/ 	return __webpack_require__(__webpack_require__.s = 0);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


;
let pdfjsWebApp, pdfjsWebAppOptions;
{
  pdfjsWebApp = __webpack_require__(1);
  pdfjsWebAppOptions = __webpack_require__(3);
}
;
{
  __webpack_require__(33);
}
;
{
  __webpack_require__(38);
}

function getViewerConfiguration() {
  return {
    appContainer: document.body,
    mainContainer: document.getElementById("viewerContainer"),
    viewerContainer: document.getElementById("viewer"),
    eventBus: null,
    toolbar: {
      container: document.getElementById("toolbarViewer"),
      numPages: document.getElementById("numPages"),
      pageNumber: document.getElementById("pageNumber"),
      scaleSelectContainer: document.getElementById("scaleSelectContainer"),
      scaleSelect: document.getElementById("scaleSelect"),
      customScaleOption: document.getElementById("customScaleOption"),
      previous: document.getElementById("previous"),
      next: document.getElementById("next"),
      zoomIn: document.getElementById("zoomIn"),
      zoomOut: document.getElementById("zoomOut"),
      viewFind: document.getElementById("viewFind"),
      openFile: document.getElementById("openFile"),
      print: document.getElementById("print"),
      presentationModeButton: document.getElementById("presentationMode"),
      download: document.getElementById("download"),
      viewBookmark: document.getElementById("viewBookmark")
    },
    secondaryToolbar: {
      toolbar: document.getElementById("secondaryToolbar"),
      toggleButton: document.getElementById("secondaryToolbarToggle"),
      toolbarButtonContainer: document.getElementById("secondaryToolbarButtonContainer"),
      presentationModeButton: document.getElementById("secondaryPresentationMode"),
      openFileButton: document.getElementById("secondaryOpenFile"),
      printButton: document.getElementById("secondaryPrint"),
      downloadButton: document.getElementById("secondaryDownload"),
      viewBookmarkButton: document.getElementById("secondaryViewBookmark"),
      firstPageButton: document.getElementById("firstPage"),
      lastPageButton: document.getElementById("lastPage"),
      pageRotateCwButton: document.getElementById("pageRotateCw"),
      pageRotateCcwButton: document.getElementById("pageRotateCcw"),
      cursorSelectToolButton: document.getElementById("cursorSelectTool"),
      cursorHandToolButton: document.getElementById("cursorHandTool"),
      scrollVerticalButton: document.getElementById("scrollVertical"),
      scrollHorizontalButton: document.getElementById("scrollHorizontal"),
      scrollWrappedButton: document.getElementById("scrollWrapped"),
      spreadNoneButton: document.getElementById("spreadNone"),
      spreadOddButton: document.getElementById("spreadOdd"),
      spreadEvenButton: document.getElementById("spreadEven"),
      documentPropertiesButton: document.getElementById("documentProperties")
    },
    fullscreen: {
      contextFirstPage: document.getElementById("contextFirstPage"),
      contextLastPage: document.getElementById("contextLastPage"),
      contextPageRotateCw: document.getElementById("contextPageRotateCw"),
      contextPageRotateCcw: document.getElementById("contextPageRotateCcw")
    },
    sidebar: {
      outerContainer: document.getElementById("outerContainer"),
      viewerContainer: document.getElementById("viewerContainer"),
      toggleButton: document.getElementById("sidebarToggle"),
      thumbnailButton: document.getElementById("viewThumbnail"),
      outlineButton: document.getElementById("viewOutline"),
      attachmentsButton: document.getElementById("viewAttachments"),
      thumbnailView: document.getElementById("thumbnailView"),
      outlineView: document.getElementById("outlineView"),
      attachmentsView: document.getElementById("attachmentsView")
    },
    sidebarResizer: {
      outerContainer: document.getElementById("outerContainer"),
      resizer: document.getElementById("sidebarResizer")
    },
    findBar: {
      bar: document.getElementById("findbar"),
      toggleButton: document.getElementById("viewFind"),
      findField: document.getElementById("findInput"),
      findFieldMultiline: document.getElementById('findInputMultiline'), // #201
      highlightAllCheckbox: document.getElementById("findHighlightAll"),
      caseSensitiveCheckbox: document.getElementById("findMatchCase"),
      entireWordCheckbox: document.getElementById("findEntireWord"),
      findMultipleSearchTextsCheckbox: document.getElementById('findMultipleSearchTexts'), // #201
      ignoreAccentsCheckbox: document.getElementById('findIgnoreAccents'), // #177
      findMsg: document.getElementById("findMsg"),
      findResultsCount: document.getElementById("findResultsCount"),
      findPreviousButton: document.getElementById("findPrevious"),
      findNextButton: document.getElementById("findNext")
    },
    passwordOverlay: {
      overlayName: "passwordOverlay",
      container: document.getElementById("passwordOverlay"),
      label: document.getElementById("passwordText"),
      input: document.getElementById("password"),
      submitButton: document.getElementById("passwordSubmit"),
      cancelButton: document.getElementById("passwordCancel")
    },
    documentProperties: {
      overlayName: "documentPropertiesOverlay",
      container: document.getElementById("documentPropertiesOverlay"),
      closeButton: document.getElementById("documentPropertiesClose"),
      fields: {
        fileName: document.getElementById("fileNameField"),
        fileSize: document.getElementById("fileSizeField"),
        title: document.getElementById("titleField"),
        author: document.getElementById("authorField"),
        subject: document.getElementById("subjectField"),
        keywords: document.getElementById("keywordsField"),
        creationDate: document.getElementById("creationDateField"),
        modificationDate: document.getElementById("modificationDateField"),
        creator: document.getElementById("creatorField"),
        producer: document.getElementById("producerField"),
        version: document.getElementById("versionField"),
        pageCount: document.getElementById("pageCountField"),
        pageSize: document.getElementById("pageSizeField"),
        linearized: document.getElementById("linearizedField")
      }
    },
    errorWrapper: {
      container: document.getElementById("errorWrapper"),
      errorMessage: document.getElementById("errorMessage"),
      closeButton: document.getElementById("errorClose"),
      errorMoreInfo: document.getElementById("errorMoreInfo"),
      moreInfoButton: document.getElementById("errorShowMore"),
      lessInfoButton: document.getElementById("errorShowLess")
    },
    printContainer: document.getElementById("printContainer"),
    openFileInputName: "fileInput",
    debuggerScriptPath: "./debugger.js"
  };
}

function webViewerLoad() {
  const config = getViewerConfiguration();
  window.PDFViewerApplication = pdfjsWebApp.PDFViewerApplication;
  window.PDFViewerApplicationOptions = pdfjsWebAppOptions.AppOptions;
  const event = document.createEvent("CustomEvent");
  event.initCustomEvent("webviewerloaded", true, true, {});
  document.dispatchEvent(event);
  pdfjsWebApp.PDFViewerApplication.run(config);
}

window.webViewerLoad = webViewerLoad;

/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PDFPrintServiceFactory = exports.DefaultExternalServices = exports.PDFViewerApplication = void 0;

var _ui_utils = __webpack_require__(2);

var _app_options = __webpack_require__(3);

var _pdfjsLib = __webpack_require__(4);

var _pdf_cursor_tools = __webpack_require__(6);

var _pdf_rendering_queue = __webpack_require__(8);

var _pdf_sidebar = __webpack_require__(9);

var _overlay_manager = __webpack_require__(10);

var _password_prompt = __webpack_require__(11);

var _pdf_attachment_viewer = __webpack_require__(12);

var _pdf_document_properties = __webpack_require__(13);

var _pdf_find_bar = __webpack_require__(14);

var _pdf_find_controller = __webpack_require__(15);

var _pdf_history = __webpack_require__(17);

var _pdf_link_service = __webpack_require__(18);

var _pdf_outline_viewer = __webpack_require__(19);

var _pdf_presentation_mode = __webpack_require__(20);

var _pdf_sidebar_resizer = __webpack_require__(21);

var _pdf_thumbnail_viewer = __webpack_require__(22);

var _pdf_viewer = __webpack_require__(24);

var _secondary_toolbar = __webpack_require__(29);

var _toolbar = __webpack_require__(31);

var _view_history = __webpack_require__(32);

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 ViewOnLoad = {
  UNKNOWN: -1,
  PREVIOUS: 0,
  INITIAL: 1
};

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

  static updateFindControlState(data) {}

  static updateFindMatchesCount(data) {}

  static initPassiveLoading(callbacks) {}

  static fallback(data, callback) {}

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

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

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

}

exports.DefaultExternalServices = DefaultExternalServices;
const PDFViewerApplication = {
  initialBookmark: document.location.hash.substring(1),
  _initializedCapability: (0, _pdfjsLib.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,
  pdfCursorTools: 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: {},
  contentDispositionFilename: null,

  async initialize(appConfig) {
    this.preferences = this.externalServices.createPreferences();
    this.appConfig = appConfig;
    await this._readPreferences();
    await this._parseHashParameters();
    await this._initializeL10n();

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

    try {
      const prefs = await this.preferences.getAll();

      for (const name in prefs) {
        _app_options.AppOptions.set(name, prefs[name]);
      }
    } 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 ('removepageborders' in hashParams) { // #194
      _app_options.AppOptions.set('removePageBorders', hashParams['removepageborders'] === 'true'); // #194
    }

    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);

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

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

    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;
  },

  async _initializeViewerComponents() {
    const appConfig = this.appConfig;
    this.overlayManager = new _overlay_manager.OverlayManager();
    const eventBus = appConfig.eventBus || new _ui_utils.EventBus({
      dispatchToDOM: _app_options.AppOptions.get("eventBusDispatchToDOM")
    });
    this.eventBus = eventBus;
    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({
      disableCreateObjectURL: _app_options.AppOptions.get("disableCreateObjectURL")
    });
    this.downloadManager = downloadManager;
    const findController = new _pdf_find_controller.PDFFindController({
      linkService: pdfLinkService,
      eventBus
    });
    this.findController = findController;
    const container = appConfig.mainContainer;
    const viewer = appConfig.viewerContainer;
    this.pdfViewer = new _pdf_viewer.PDFViewer({
      container,
      viewer,
      eventBus,
      renderingQueue: pdfRenderingQueue,
      linkService: pdfLinkService,
      downloadManager,
      findController,
      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"),
      removePageBorders: _app_options.AppOptions.get('removePageBorders'), // #194
      renderInteractiveForms: _app_options.AppOptions.get("renderInteractiveForms"),
      enablePrintAutoRotate: _app_options.AppOptions.get("enablePrintAutoRotate"),
      useOnlyCssZoom: _app_options.AppOptions.get("useOnlyCssZoom"),
      maxCanvasPixels: _app_options.AppOptions.get("maxCanvasPixels")
    });
    pdfRenderingQueue.setViewer(this.pdfViewer);
    pdfLinkService.setViewer(this.pdfViewer);
    this.pdfThumbnailViewer = new _pdf_thumbnail_viewer.PDFThumbnailViewer({
      container: appConfig.sidebar.thumbnailView,
      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,
        contextMenuItems: appConfig.fullscreen
      });
    }

    this.passwordPrompt = new _password_prompt.PasswordPrompt(appConfig.passwordOverlay, this.overlayManager, this.l10n);
    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.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;
  },

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

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

  get printing() {
    return !!this.printService;
  },

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

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

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

    return (0, _pdfjsLib.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, _pdfjsLib.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, _ui_utils.getPDFFileNameFromURL)(url, "");

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

    this.setTitle(title);
  },

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

    document.title = title;
  },

  async close() {
    const errorWrapper = this.appConfig.errorWrapper.container;
    errorWrapper.setAttribute("hidden", "true");

    if (!this.pdfLoadingTask) {
      return undefined;
    }

    const promise = 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);
    }

    this.store = null;
    this.isInitialViewSet = false;
    this.downloadComplete = false;
    this.url = "";
    this.baseUrl = "";
    this.contentDispositionFilename = null;
    this.pdfSidebar.reset();
    this.pdfOutlineViewer.reset();
    this.pdfAttachmentViewer.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();
    }

    return promise;
  },

  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) {
      _pdfjsLib.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) {
        const value = args[key];

        if (key === "length") {
          this.pdfDocumentProperties.setFileSize(value);
        }

        parameters[key] = value;
      }
    }

    const loadingTask = (0, _pdfjsLib.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;
      }

      const message = exception && exception.message;
      let loadingErrorMessage;

      if (exception instanceof _pdfjsLib.InvalidPDFException) {
        loadingErrorMessage = this.l10n.get("invalid_file_error", null, "Invalid or corrupted PDF file.");
      } else if (exception instanceof _pdfjsLib.MissingPDFException) {
        loadingErrorMessage = this.l10n.get("missing_file_error", null, "Missing PDF file.");
      } else if (exception instanceof _pdfjsLib.UnexpectedResponseException) {
        loadingErrorMessage = this.l10n.get("unexpected_response_error", null, "Unexpected server response.");
      } else {
        loadingErrorMessage = this.l10n.get("loading_error", null, "An error occurred while loading the PDF.");
      }

      return loadingErrorMessage.then(msg => {
        this.error(msg, {
          message
        });
        var error = new Error(msg); // #205
        this.onError(error); // #205
        throw error;
      });
    });
  },

  download() {
    function downloadByUrl() {
      downloadManager.downloadUrl(url, filename);
    }

    const url = this.baseUrl;
    const filename = this.contentDispositionFilename || (0, _ui_utils.getPDFFileNameFromURL)(this.url);
    const downloadManager = this.downloadManager;

    downloadManager.onerror = err => {
      this.error(`PDF failed to download: ${err}`);
    };

    if (!this.pdfDocument || !this.downloadComplete) {
      downloadByUrl();
      return;
    }

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

  fallback(featureId) {
    if (this.fellback) {
      return;
    }

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

      PDFViewerApplication.download();
    });
  },

  error(message, moreInfo) {
    const moreInfoText = [this.l10n.get("error_version_info", {
      version: _pdfjsLib.version || "?",
      build: _pdfjsLib.build || "?"
    }, "PDF.js v{{version}} (build: {{build}})")];

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

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

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

    const errorWrapperConfig = this.appConfig.errorWrapper;
    const errorWrapper = errorWrapperConfig.container;
    errorWrapper.removeAttribute("hidden");
    const errorMessage = errorWrapperConfig.errorMessage;
    errorMessage.textContent = message;
    const closeButton = errorWrapperConfig.closeButton;

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

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

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

    lessInfoButton.onclick = function () {
      errorMoreInfo.setAttribute("hidden", "true");
      moreInfoButton.removeAttribute("hidden");
      lessInfoButton.setAttribute("hidden", "true");
    };

    moreInfoButton.oncontextmenu = _ui_utils.noContextMenuHandler;
    lessInfoButton.oncontextmenu = _ui_utils.noContextMenuHandler;
    closeButton.oncontextmenu = _ui_utils.noContextMenuHandler;
    moreInfoButton.removeAttribute("hidden");
    lessInfoButton.setAttribute("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(() => {
      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);
    const store = this.store = new _view_history.ViewHistory(pdfDocument.fingerprint);
    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);
    firstPagePromise.then(pdfPage => {
      this.loadingBar.setWidth(this.appConfig.viewerContainer);
      const storePromise = store.getMultiple({
        page: null,
        zoom: _ui_utils.DEFAULT_SCALE_VALUE,
        scrollLeft: "0",
        scrollTop: "0",
        rotation: null,
        sidebarView: _pdf_sidebar.SidebarView.UNKNOWN,
        scrollMode: _ui_utils.ScrollMode.UNKNOWN,
        spreadMode: _ui_utils.SpreadMode.UNKNOWN
      }).catch(() => {});
      Promise.all([_ui_utils.animationStarted, storePromise, pageLayoutPromise, pageModePromise, openActionPromise]).then(async ([timeStamp, values = {}, pageLayout, pageMode, openAction]) => {
        const viewOnLoad = _app_options.AppOptions.get("viewOnLoad");

        this._initializePdfHistory({
          fingerprint: pdfDocument.fingerprint,
          viewOnLoad,
          initialDest: openAction && 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 (values.page && viewOnLoad !== ViewOnLoad.INITIAL) {
          hash = `page=${values.page}&zoom=${zoom || values.zoom},` + `${values.scrollLeft},${values.scrollTop}`;
          rotation = parseInt(values.rotation, 10);

          if (sidebarView === _pdf_sidebar.SidebarView.UNKNOWN) {
            sidebarView = values.sidebarView | 0;
          }

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

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

        if (pageMode && sidebarView === _pdf_sidebar.SidebarView.UNKNOWN) {
          sidebarView = apiPageModeToSidebarView(pageMode);
        }

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

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

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

        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();
      });
    });
    pdfDocument.getPageLabels().then(labels => {
      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;
      }

      pdfViewer.setPageLabels(labels);
      pdfThumbnailViewer.setPageLabels(labels);
      this.toolbar.setPagesCount(pdfDocument.numPages, true);
      this.toolbar.setPageNumber(pdfViewer.currentPageNumber, pdfViewer.currentPageLabel);
    });
    pagesPromise.then(async () => {
      const [openAction, javaScript] = await Promise.all([openActionPromise, pdfDocument.getJavaScript()]);
      let triggerAutoPrint = false;

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

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

          console.warn("Warning: JavaScript is not supported");
          this.fallback(_pdfjsLib.UNSUPPORTED_FEATURES.javaScript);
          return true;
        });

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

      if (!this.supportsPrinting) {
        return;
      }

      if (triggerAutoPrint) {
        setTimeout(function () {
          window.printPDF();
        });
      }
    });
    onePageRendered.then(() => {
      pdfDocument.getOutline().then(outline => {
        this.pdfOutlineViewer.render({
          outline
        });
      });
      pdfDocument.getAttachments().then(attachments => {
        this.pdfAttachmentViewer.render({
          attachments
        });
      });
    });
    pdfDocument.getMetadata().then(({
      info,
      metadata,
      contentDispositionFilename
    }) => {
      this.documentInfo = info;
      this.metadata = metadata;
      this.contentDispositionFilename = contentDispositionFilename;
      console.log('PDF viewer: ngx-extended-pdf-viewer running on pdf.js ' + _pdfjsLib.version);
      console.log("PDF " + pdfDocument.fingerprint + " [" + info.PDFFormatVersion + " " + (info.Producer || "-").trim() + " / " + (info.Creator || "-").trim() + "]" + " (PDF.js: " + (_pdfjsLib.version || "-") + (_app_options.AppOptions.get("enableWebGL") ? " [WebGL]" : "") + ")");
      let pdfTitle;
      const infoTitle = info && info["Title"];

      if (infoTitle) {
        pdfTitle = infoTitle;
      }

      const metadataTitle = metadata && 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.IsAcroFormPresent) {
        console.warn("Warning: AcroForm/XFA is not supported");
        this.fallback(_pdfjsLib.UNSUPPORTED_FEATURES.forms);
      }

      let versionId = "other";
      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"];

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

      let generatorId = "other";
      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"];

      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.IsAcroFormPresent) {
        formType = info.IsXFAPresent ? "xfa" : "acroform";
      }

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

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

  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();

    if (this.pdfViewer.renderer !== _ui_utils.RendererType.SVG) {
      this.pdfDocument.cleanup();
    }
  },

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

  beforePrint() {
    if (this.printService) {
      return;
    }

    if (!this.supportsPrinting) {
      this.l10n.get("printing_not_supported", null, "Warning: Printing is not fully supported by this browser.").then(printMessage => {
        this.error(printMessage);
      });
      return;
    }

    if (!this.pdfViewer.pageViewsReady) {
      this.l10n.get("printing_not_ready", null, "Warning: The PDF is not fully loaded for printing.").then(notReadyMessage => {
        window.alert(notReadyMessage);
      });
      return;
    }

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

  afterPrint() {
    if (this.printService) {
document.body.removeAttribute('data-pdfjsprinting');
      this.printService.destroy();
      this.printService = null;
    }

    this.forceRendering();
  },

  rotatePages(delta) {
    if (!this.pdfDocument) {
      return;
    }

    const newRotation = (this.pdfViewer.pagesRotation + 360 + delta) % 360;
    this.pdfViewer.pagesRotation = newRotation;
  },

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

    this.pdfPresentationMode.request();
  },

  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("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._o