path: root/browser/extensions/pdfjs/content/web/viewer.js

/* Copyright 2016 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
'use strict';
var DEFAULT_URL = 'compressed.tracemonkey-pldi-09.pdf';
;
var pdfjsWebLibs;
{
  pdfjsWebLibs = { pdfjsWebPDFJS: window.pdfjsDistBuildPdf };
  (function () {
    (function (root, factory) {
      factory(root.pdfjsWebGrabToPan = {});
    }(this, function (exports) {
      /**
       * Construct a GrabToPan instance for a given HTML element.
       * @param options.element {Element}
       * @param options.ignoreTarget {function} optional. See `ignoreTarget(node)`
       * @param options.onActiveChanged {function(boolean)} optional. Called
       *  when grab-to-pan is (de)activated. The first argument is a boolean that
       *  shows whether grab-to-pan is activated.
       */
      function GrabToPan(options) {
        this.element = options.element;
        this.document = options.element.ownerDocument;
        if (typeof options.ignoreTarget === 'function') {
          this.ignoreTarget = options.ignoreTarget;
        }
        this.onActiveChanged = options.onActiveChanged;
        // Bind the contexts to ensure that `this` always points to
        // the GrabToPan instance.
        this.activate = this.activate.bind(this);
        this.deactivate = this.deactivate.bind(this);
        this.toggle = this.toggle.bind(this);
        this._onmousedown = this._onmousedown.bind(this);
        this._onmousemove = this._onmousemove.bind(this);
        this._endPan = this._endPan.bind(this);
        // This overlay will be inserted in the document when the mouse moves during
        // a grab operation, to ensure that the cursor has the desired appearance.
        var overlay = this.overlay = document.createElement('div');
        overlay.className = 'grab-to-pan-grabbing';
      }
      GrabToPan.prototype = {
        /**
         * Class name of element which can be grabbed
         */
        CSS_CLASS_GRAB: 'grab-to-pan-grab',
        /**
         * Bind a mousedown event to the element to enable grab-detection.
         */
        activate: function GrabToPan_activate() {
          if (!this.active) {
            this.active = true;
            this.element.addEventListener('mousedown', this._onmousedown, true);
            this.element.classList.add(this.CSS_CLASS_GRAB);
            if (this.onActiveChanged) {
              this.onActiveChanged(true);
            }
          }
        },
        /**
         * Removes all events. Any pending pan session is immediately stopped.
         */
        deactivate: function GrabToPan_deactivate() {
          if (this.active) {
            this.active = false;
            this.element.removeEventListener('mousedown', this._onmousedown, true);
            this._endPan();
            this.element.classList.remove(this.CSS_CLASS_GRAB);
            if (this.onActiveChanged) {
              this.onActiveChanged(false);
            }
          }
        },
        toggle: function GrabToPan_toggle() {
          if (this.active) {
            this.deactivate();
          } else {
            this.activate();
          }
        },
        /**
         * Whether to not pan if the target element is clicked.
         * Override this method to change the default behaviour.
         *
         * @param node {Element} The target of the event
         * @return {boolean} Whether to not react to the click event.
         */
        ignoreTarget: function GrabToPan_ignoreTarget(node) {
          // Use matchesSelector to check whether the clicked element
          // is (a child of) an input element / link
          return node[matchesSelector]('a[href], a[href] *, input, textarea, button, button *, select, option');
        },
        /**
         * @private
         */
        _onmousedown: function GrabToPan__onmousedown(event) {
          if (event.button !== 0 || this.ignoreTarget(event.target)) {
            return;
          }
          if (event.originalTarget) {
            try {
              event.originalTarget.tagName;
            } catch (e) {
              // Mozilla-specific: element is a scrollbar (XUL element)
              return;
            }
          }
          this.scrollLeftStart = this.element.scrollLeft;
          this.scrollTopStart = this.element.scrollTop;
          this.clientXStart = event.clientX;
          this.clientYStart = event.clientY;
          this.document.addEventListener('mousemove', this._onmousemove, true);
          this.document.addEventListener('mouseup', this._endPan, true);
          // When a scroll event occurs before a mousemove, assume that the user
          // dragged a scrollbar (necessary for Opera Presto, Safari and IE)
          // (not needed for Chrome/Firefox)
          this.element.addEventListener('scroll', this._endPan, true);
          event.preventDefault();
          event.stopPropagation();
          var focusedElement = document.activeElement;
          if (focusedElement && !focusedElement.contains(event.target)) {
            focusedElement.blur();
          }
        },
        /**
         * @private
         */
        _onmousemove: function GrabToPan__onmousemove(event) {
          this.element.removeEventListener('scroll', this._endPan, true);
          if (isLeftMouseReleased(event)) {
            this._endPan();
            return;
          }
          var xDiff = event.clientX - this.clientXStart;
          var yDiff = event.clientY - this.clientYStart;
          var scrollTop = this.scrollTopStart - yDiff;
          var scrollLeft = this.scrollLeftStart - xDiff;
          if (this.element.scrollTo) {
            this.element.scrollTo({
              top: scrollTop,
              left: scrollLeft,
              behavior: 'instant'
            });
          } else {
            this.element.scrollTop = scrollTop;
            this.element.scrollLeft = scrollLeft;
          }
          if (!this.overlay.parentNode) {
            document.body.appendChild(this.overlay);
          }
        },
        /**
         * @private
         */
        _endPan: function GrabToPan__endPan() {
          this.element.removeEventListener('scroll', this._endPan, true);
          this.document.removeEventListener('mousemove', this._onmousemove, true);
          this.document.removeEventListener('mouseup', this._endPan, true);
          if (this.overlay.parentNode) {
            this.overlay.parentNode.removeChild(this.overlay);
          }
        }
      };
      // Get the correct (vendor-prefixed) name of the matches method.
      var matchesSelector;
      [
        'webkitM',
        'mozM',
        'msM',
        'oM',
        'm'
      ].some(function (prefix) {
        var name = prefix + 'atches';
        if (name in document.documentElement) {
          matchesSelector = name;
        }
        name += 'Selector';
        if (name in document.documentElement) {
          matchesSelector = name;
        }
        return matchesSelector;
      });
      // If found, then truthy, and [].some() ends.
      // Browser sniffing because it's impossible to feature-detect
      // whether event.which for onmousemove is reliable
      var isNotIEorIsIE10plus = !document.documentMode || document.documentMode > 9;
      var chrome = window.chrome;
      var isChrome15OrOpera15plus = chrome && (chrome.webstore || chrome.app);
      //                                       ^ Chrome 15+       ^ Opera 15+
      var isSafari6plus = /Apple/.test(navigator.vendor) && /Version\/([6-9]\d*|[1-5]\d+)/.test(navigator.userAgent);
      /**
       * Whether the left mouse is not pressed.
       * @param event {MouseEvent}
       * @return {boolean} True if the left mouse button is not pressed.
       *                   False if unsure or if the left mouse button is pressed.
       */
      function isLeftMouseReleased(event) {
        if ('buttons' in event && isNotIEorIsIE10plus) {
          // http://www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-buttons
          // Firefox 15+
          // Internet Explorer 10+
          return !(event.buttons & 1);
        }
        if (isChrome15OrOpera15plus || isSafari6plus) {
          // Chrome 14+
          // Opera 15+
          // Safari 6.0+
          return event.which === 0;
        }
      }
      exports.GrabToPan = GrabToPan;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebOverlayManager = {});
    }(this, function (exports) {
      var OverlayManager = {
        overlays: {},
        active: null,
        /**
         * @param {string} name The name of the overlay that is registered.
         * @param {HTMLDivElement} element The overlay's DOM element.
         * @param {function} callerCloseMethod (optional) The method that, if present,
         *                   will call OverlayManager.close from the Object
         *                   registering the overlay. Access to this method is
         *                   necessary in order to run cleanup code when e.g.
         *                   the overlay is force closed. The default is null.
         * @param {boolean} canForceClose (optional) Indicates if opening the overlay
         *                  will close an active overlay. The default is false.
         * @returns {Promise} A promise that is resolved when the overlay has been
         *                    registered.
         */
        register: function overlayManagerRegister(name, element, callerCloseMethod, canForceClose) {
          return new Promise(function (resolve) {
            var container;
            if (!name || !element || !(container = element.parentNode)) {
              throw new Error('Not enough parameters.');
            } else if (this.overlays[name]) {
              throw new Error('The overlay is already registered.');
            }
            this.overlays[name] = {
              element: element,
              container: container,
              callerCloseMethod: callerCloseMethod || null,
              canForceClose: canForceClose || false
            };
            resolve();
          }.bind(this));
        },
        /**
         * @param {string} name The name of the overlay that is unregistered.
         * @returns {Promise} A promise that is resolved when the overlay has been
         *                    unregistered.
         */
        unregister: function overlayManagerUnregister(name) {
          return new Promise(function (resolve) {
            if (!this.overlays[name]) {
              throw new Error('The overlay does not exist.');
            } else if (this.active === name) {
              throw new Error('The overlay cannot be removed while it is active.');
            }
            delete this.overlays[name];
            resolve();
          }.bind(this));
        },
        /**
         * @param {string} name The name of the overlay that should be opened.
         * @returns {Promise} A promise that is resolved when the overlay has been
         *                    opened.
         */
        open: function overlayManagerOpen(name) {
          return new Promise(function (resolve) {
            if (!this.overlays[name]) {
              throw new Error('The overlay does not exist.');
            } else if (this.active) {
              if (this.overlays[name].canForceClose) {
                this._closeThroughCaller();
              } else if (this.active === name) {
                throw new Error('The overlay is already active.');
              } else {
                throw new Error('Another overlay is currently active.');
              }
            }
            this.active = name;
            this.overlays[this.active].element.classList.remove('hidden');
            this.overlays[this.active].container.classList.remove('hidden');
            window.addEventListener('keydown', this._keyDown);
            resolve();
          }.bind(this));
        },
        /**
         * @param {string} name The name of the overlay that should be closed.
         * @returns {Promise} A promise that is resolved when the overlay has been
         *                    closed.
         */
        close: function overlayManagerClose(name) {
          return new Promise(function (resolve) {
            if (!this.overlays[name]) {
              throw new Error('The overlay does not exist.');
            } else if (!this.active) {
              throw new Error('The overlay is currently not active.');
            } else if (this.active !== name) {
              throw new Error('Another overlay is currently active.');
            }
            this.overlays[this.active].container.classList.add('hidden');
            this.overlays[this.active].element.classList.add('hidden');
            this.active = null;
            window.removeEventListener('keydown', this._keyDown);
            resolve();
          }.bind(this));
        },
        /**
         * @private
         */
        _keyDown: function overlayManager_keyDown(evt) {
          var self = OverlayManager;
          if (self.active && evt.keyCode === 27) {
            // Esc key.
            self._closeThroughCaller();
            evt.preventDefault();
          }
        },
        /**
         * @private
         */
        _closeThroughCaller: function overlayManager_closeThroughCaller() {
          if (this.overlays[this.active].callerCloseMethod) {
            this.overlays[this.active].callerCloseMethod();
          }
          if (this.active) {
            this.close(this.active);
          }
        }
      };
      exports.OverlayManager = OverlayManager;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFRenderingQueue = {});
    }(this, function (exports) {
      var CLEANUP_TIMEOUT = 30000;
      var RenderingStates = {
        INITIAL: 0,
        RUNNING: 1,
        PAUSED: 2,
        FINISHED: 3
      };
      /**
       * Controls rendering of the views for pages and thumbnails.
       * @class
       */
      var PDFRenderingQueue = function PDFRenderingQueueClosure() {
        /**
         * @constructs
         */
        function PDFRenderingQueue() {
          this.pdfViewer = null;
          this.pdfThumbnailViewer = null;
          this.onIdle = null;
          this.highestPriorityPage = null;
          this.idleTimeout = null;
          this.printing = false;
          this.isThumbnailViewEnabled = false;
        }
        PDFRenderingQueue.prototype = /** @lends PDFRenderingQueue.prototype */
        {
          /**
           * @param {PDFViewer} pdfViewer
           */
          setViewer: function PDFRenderingQueue_setViewer(pdfViewer) {
            this.pdfViewer = pdfViewer;
          },
          /**
           * @param {PDFThumbnailViewer} pdfThumbnailViewer
           */
          setThumbnailViewer: function PDFRenderingQueue_setThumbnailViewer(pdfThumbnailViewer) {
            this.pdfThumbnailViewer = pdfThumbnailViewer;
          },
          /**
           * @param {IRenderableView} view
           * @returns {boolean}
           */
          isHighestPriority: function PDFRenderingQueue_isHighestPriority(view) {
            return this.highestPriorityPage === view.renderingId;
          },
          renderHighestPriority: function PDFRenderingQueue_renderHighestPriority(currentlyVisiblePages) {
            if (this.idleTimeout) {
              clearTimeout(this.idleTimeout);
              this.idleTimeout = null;
            }
            // Pages have a higher priority than thumbnails, so check them first.
            if (this.pdfViewer.forceRendering(currentlyVisiblePages)) {
              return;
            }
            // No pages needed rendering so check thumbnails.
            if (this.pdfThumbnailViewer && this.isThumbnailViewEnabled) {
              if (this.pdfThumbnailViewer.forceRendering()) {
                return;
              }
            }
            if (this.printing) {
              // If printing is currently ongoing do not reschedule cleanup.
              return;
            }
            if (this.onIdle) {
              this.idleTimeout = setTimeout(this.onIdle.bind(this), CLEANUP_TIMEOUT);
            }
          },
          getHighestPriority: function PDFRenderingQueue_getHighestPriority(visible, views, scrolledDown) {
            // The state has changed figure out which page has the highest priority to
            // render next (if any).
            // Priority:
            // 1 visible pages
            // 2 if last scrolled down page after the visible pages
            // 2 if last scrolled up page before the visible pages
            var visibleViews = visible.views;
            var numVisible = visibleViews.length;
            if (numVisible === 0) {
              return false;
            }
            for (var i = 0; i < numVisible; ++i) {
              var view = visibleViews[i].view;
              if (!this.isViewFinished(view)) {
                return view;
              }
            }
            // All the visible views have rendered, try to render next/previous pages.
            if (scrolledDown) {
              var nextPageIndex = visible.last.id;
              // ID's start at 1 so no need to add 1.
              if (views[nextPageIndex] && !this.isViewFinished(views[nextPageIndex])) {
                return views[nextPageIndex];
              }
            } else {
              var previousPageIndex = visible.first.id - 2;
              if (views[previousPageIndex] && !this.isViewFinished(views[previousPageIndex])) {
                return views[previousPageIndex];
              }
            }
            // Everything that needs to be rendered has been.
            return null;
          },
          /**
           * @param {IRenderableView} view
           * @returns {boolean}
           */
          isViewFinished: function PDFRenderingQueue_isViewFinished(view) {
            return view.renderingState === RenderingStates.FINISHED;
          },
          /**
           * Render a page or thumbnail view. This calls the appropriate function
           * based on the views state. If the view is already rendered it will return
           * false.
           * @param {IRenderableView} view
           */
          renderView: function PDFRenderingQueue_renderView(view) {
            var state = view.renderingState;
            switch (state) {
            case RenderingStates.FINISHED:
              return false;
            case RenderingStates.PAUSED:
              this.highestPriorityPage = view.renderingId;
              view.resume();
              break;
            case RenderingStates.RUNNING:
              this.highestPriorityPage = view.renderingId;
              break;
            case RenderingStates.INITIAL:
              this.highestPriorityPage = view.renderingId;
              var continueRendering = function () {
                this.renderHighestPriority();
              }.bind(this);
              view.draw().then(continueRendering, continueRendering);
              break;
            }
            return true;
          }
        };
        return PDFRenderingQueue;
      }();
      exports.RenderingStates = RenderingStates;
      exports.PDFRenderingQueue = PDFRenderingQueue;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPreferences = {});
    }(this, function (exports) {
      var defaultPreferences;
      defaultPreferences = Promise.resolve({
        "showPreviousViewOnLoad": true,
        "defaultZoomValue": "",
        "sidebarViewOnLoad": 0,
        "enableHandToolOnLoad": false,
        "enableWebGL": false,
        "pdfBugEnabled": false,
        "disableRange": false,
        "disableStream": false,
        "disableAutoFetch": false,
        "disableFontFace": false,
        "disableTextLayer": false,
        "useOnlyCssZoom": false,
        "externalLinkTarget": 0,
        "enhanceTextSelection": false,
        "renderInteractiveForms": false,
        "disablePageLabels": false
      });
      function cloneObj(obj) {
        var result = {};
        for (var i in obj) {
          if (Object.prototype.hasOwnProperty.call(obj, i)) {
            result[i] = obj[i];
          }
        }
        return result;
      }
      /**
       * Preferences - Utility for storing persistent settings.
       *   Used for settings that should be applied to all opened documents,
       *   or every time the viewer is loaded.
       */
      var Preferences = {
        prefs: null,
        isInitializedPromiseResolved: false,
        initializedPromise: null,
        /**
         * Initialize and fetch the current preference values from storage.
         * @return {Promise} A promise that is resolved when the preferences
         *                   have been initialized.
         */
        initialize: function preferencesInitialize() {
          return this.initializedPromise = defaultPreferences.then(function (defaults) {
            Object.defineProperty(this, 'defaults', {
              value: Object.freeze(defaults),
              writable: false,
              enumerable: true,
              configurable: false
            });
            this.prefs = cloneObj(defaults);
            return this._readFromStorage(defaults);
          }.bind(this)).then(function (prefObj) {
            this.isInitializedPromiseResolved = true;
            if (prefObj) {
              this.prefs = prefObj;
            }
          }.bind(this));
        },
        /**
         * Stub function for writing preferences to storage.
         * NOTE: This should be overridden by a build-specific function defined below.
         * @param {Object} prefObj The preferences that should be written to storage.
         * @return {Promise} A promise that is resolved when the preference values
         *                   have been written.
         */
        _writeToStorage: function preferences_writeToStorage(prefObj) {
          return Promise.resolve();
        },
        /**
         * Stub function for reading preferences from storage.
         * NOTE: This should be overridden by a build-specific function defined below.
         * @param {Object} prefObj The preferences that should be read from storage.
         * @return {Promise} A promise that is resolved with an {Object} containing
         *                   the preferences that have been read.
         */
        _readFromStorage: function preferences_readFromStorage(prefObj) {
          return Promise.resolve();
        },
        /**
         * Reset the preferences to their default values and update storage.
         * @return {Promise} A promise that is resolved when the preference values
         *                   have been reset.
         */
        reset: function preferencesReset() {
          return this.initializedPromise.then(function () {
            this.prefs = cloneObj(this.defaults);
            return this._writeToStorage(this.defaults);
          }.bind(this));
        },
        /**
         * Replace the current preference values with the ones from storage.
         * @return {Promise} A promise that is resolved when the preference values
         *                   have been updated.
         */
        reload: function preferencesReload() {
          return this.initializedPromise.then(function () {
            this._readFromStorage(this.defaults).then(function (prefObj) {
              if (prefObj) {
                this.prefs = prefObj;
              }
            }.bind(this));
          }.bind(this));
        },
        /**
         * Set the value of a preference.
         * @param {string} name The name of the preference that should be changed.
         * @param {boolean|number|string} value The new value of the preference.
         * @return {Promise} A promise that is resolved when the value has been set,
         *                   provided that the preference exists and the types match.
         */
        set: function preferencesSet(name, value) {
          return this.initializedPromise.then(function () {
            if (this.defaults[name] === undefined) {
              throw new Error('preferencesSet: \'' + name + '\' is undefined.');
            } else if (value === undefined) {
              throw new Error('preferencesSet: no value is specified.');
            }
            var valueType = typeof value;
            var defaultType = typeof this.defaults[name];
            if (valueType !== defaultType) {
              if (valueType === 'number' && defaultType === 'string') {
                value = value.toString();
              } else {
                throw new Error('Preferences_set: \'' + value + '\' is a \"' + valueType + '\", expected \"' + defaultType + '\".');
              }
            } else {
              if (valueType === 'number' && (value | 0) !== value) {
                throw new Error('Preferences_set: \'' + value + '\' must be an \"integer\".');
              }
            }
            this.prefs[name] = value;
            return this._writeToStorage(this.prefs);
          }.bind(this));
        },
        /**
         * Get the value of a preference.
         * @param {string} name The name of the preference whose value is requested.
         * @return {Promise} A promise that is resolved with a {boolean|number|string}
         *                   containing the value of the preference.
         */
        get: function preferencesGet(name) {
          return this.initializedPromise.then(function () {
            var defaultValue = this.defaults[name];
            if (defaultValue === undefined) {
              throw new Error('preferencesGet: \'' + name + '\' is undefined.');
            } else {
              var prefValue = this.prefs[name];
              if (prefValue !== undefined) {
                return prefValue;
              }
            }
            return defaultValue;
          }.bind(this));
        }
      };
      exports.Preferences = Preferences;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebViewHistory = {});
    }(this, function (exports) {
      var DEFAULT_VIEW_HISTORY_CACHE_SIZE = 20;
      /**
       * View History - This is a utility for saving various view parameters for
       *                recently opened files.
       *
       * The way that the view parameters are stored depends on how PDF.js is built,
       * for 'gulp <flag>' the following cases exist:
       *  - FIREFOX or MOZCENTRAL - uses sessionStorage.
       *  - GENERIC or CHROME     - uses localStorage, if it is available.
       */
      var ViewHistory = function ViewHistoryClosure() {
        function ViewHistory(fingerprint, cacheSize) {
          this.fingerprint = fingerprint;
          this.cacheSize = cacheSize || DEFAULT_VIEW_HISTORY_CACHE_SIZE;
          this.isInitializedPromiseResolved = false;
          this.initializedPromise = this._readFromStorage().then(function (databaseStr) {
            this.isInitializedPromiseResolved = true;
            var database = JSON.parse(databaseStr || '{}');
            if (!('files' in database)) {
              database.files = [];
            }
            if (database.files.length >= this.cacheSize) {
              database.files.shift();
            }
            var index;
            for (var i = 0, length = database.files.length; i < length; i++) {
              var branch = database.files[i];
              if (branch.fingerprint === this.fingerprint) {
                index = i;
                break;
              }
            }
            if (typeof index !== 'number') {
              index = database.files.push({ fingerprint: this.fingerprint }) - 1;
            }
            this.file = database.files[index];
            this.database = database;
          }.bind(this));
        }
        ViewHistory.prototype = {
          _writeToStorage: function ViewHistory_writeToStorage() {
            return new Promise(function (resolve) {
              var databaseStr = JSON.stringify(this.database);
              sessionStorage.setItem('pdfjsHistory', databaseStr);
              resolve();
            }.bind(this));
          },
          _readFromStorage: function ViewHistory_readFromStorage() {
            return new Promise(function (resolve) {
              resolve(sessionStorage.getItem('pdfjsHistory'));
            });
          },
          set: function ViewHistory_set(name, val) {
            if (!this.isInitializedPromiseResolved) {
              return;
            }
            this.file[name] = val;
            return this._writeToStorage();
          },
          setMultiple: function ViewHistory_setMultiple(properties) {
            if (!this.isInitializedPromiseResolved) {
              return;
            }
            for (var name in properties) {
              this.file[name] = properties[name];
            }
            return this._writeToStorage();
          },
          get: function ViewHistory_get(name, defaultValue) {
            if (!this.isInitializedPromiseResolved) {
              return defaultValue;
            }
            return this.file[name] || defaultValue;
          }
        };
        return ViewHistory;
      }();
      exports.ViewHistory = ViewHistory;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebDownloadManager = {}, root.pdfjsWebPDFJS);
    }(this, function (exports, pdfjsLib) {
    }));
    (function (root, factory) {
      factory(root.pdfjsWebHandTool = {}, root.pdfjsWebGrabToPan, root.pdfjsWebPreferences);
    }(this, function (exports, grabToPan, preferences) {
      var GrabToPan = grabToPan.GrabToPan;
      var Preferences = preferences.Preferences;
      /**
       * @typedef {Object} HandToolOptions
       * @property {HTMLDivElement} container - The document container.
       * @property {EventBus} eventBus - The application event bus.
       */
      /**
       * @class
       */
      var HandTool = function HandToolClosure() {
        /**
         * @constructs HandTool
         * @param {HandToolOptions} options
         */
        function HandTool(options) {
          this.container = options.container;
          this.eventBus = options.eventBus;
          this.wasActive = false;
          this.handTool = new GrabToPan({
            element: this.container,
            onActiveChanged: function (isActive) {
              this.eventBus.dispatch('handtoolchanged', { isActive: isActive });
            }.bind(this)
          });
          this.eventBus.on('togglehandtool', this.toggle.bind(this));
          this.eventBus.on('localized', function (e) {
            Preferences.get('enableHandToolOnLoad').then(function resolved(value) {
              if (value) {
                this.handTool.activate();
              }
            }.bind(this), function rejected(reason) {
            });
          }.bind(this));
          this.eventBus.on('presentationmodechanged', function (e) {
            if (e.switchInProgress) {
              return;
            }
            if (e.active) {
              this.enterPresentationMode();
            } else {
              this.exitPresentationMode();
            }
          }.bind(this));
        }
        HandTool.prototype = {
          /**
           * @return {boolean}
           */
          get isActive() {
            return !!this.handTool.active;
          },
          toggle: function HandTool_toggle() {
            this.handTool.toggle();
          },
          enterPresentationMode: function HandTool_enterPresentationMode() {
            if (this.isActive) {
              this.wasActive = true;
              this.handTool.deactivate();
            }
          },
          exitPresentationMode: function HandTool_exitPresentationMode() {
            if (this.wasActive) {
              this.wasActive = false;
              this.handTool.activate();
            }
          }
        };
        return HandTool;
      }();
      exports.HandTool = HandTool;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFAttachmentViewer = {}, root.pdfjsWebPDFJS);
    }(this, function (exports, pdfjsLib) {
      /**
       * @typedef {Object} PDFAttachmentViewerOptions
       * @property {HTMLDivElement} container - The viewer element.
       * @property {EventBus} eventBus - The application event bus.
       * @property {DownloadManager} downloadManager - The download manager.
       */
      /**
       * @typedef {Object} PDFAttachmentViewerRenderParameters
       * @property {Array|null} attachments - An array of attachment objects.
       */
      /**
       * @class
       */
      var PDFAttachmentViewer = function PDFAttachmentViewerClosure() {
        /**
         * @constructs PDFAttachmentViewer
         * @param {PDFAttachmentViewerOptions} options
         */
        function PDFAttachmentViewer(options) {
          this.attachments = null;
          this.container = options.container;
          this.eventBus = options.eventBus;
          this.downloadManager = options.downloadManager;
        }
        PDFAttachmentViewer.prototype = {
          reset: function PDFAttachmentViewer_reset() {
            this.attachments = null;
            var container = this.container;
            while (container.firstChild) {
              container.removeChild(container.firstChild);
            }
          },
          /**
           * @private
           */
          _dispatchEvent: function PDFAttachmentViewer_dispatchEvent(attachmentsCount) {
            this.eventBus.dispatch('attachmentsloaded', {
              source: this,
              attachmentsCount: attachmentsCount
            });
          },
          /**
           * @private
           */
          _bindLink: function PDFAttachmentViewer_bindLink(button, content, filename) {
            button.onclick = function downloadFile(e) {
              this.downloadManager.downloadData(content, filename, '');
              return false;
            }.bind(this);
          },
          /**
           * @param {PDFAttachmentViewerRenderParameters} params
           */
          render: function PDFAttachmentViewer_render(params) {
            var attachments = params && params.attachments || null;
            var attachmentsCount = 0;
            if (this.attachments) {
              this.reset();
            }
            this.attachments = attachments;
            if (!attachments) {
              this._dispatchEvent(attachmentsCount);
              return;
            }
            var names = Object.keys(attachments).sort(function (a, b) {
              return a.toLowerCase().localeCompare(b.toLowerCase());
            });
            attachmentsCount = names.length;
            for (var i = 0; i < attachmentsCount; i++) {
              var item = attachments[names[i]];
              var filename = pdfjsLib.getFilenameFromUrl(item.filename);
              var div = document.createElement('div');
              div.className = 'attachmentsItem';
              var button = document.createElement('button');
              this._bindLink(button, item.content, filename);
              button.textContent = pdfjsLib.removeNullCharacters(filename);
              div.appendChild(button);
              this.container.appendChild(div);
            }
            this._dispatchEvent(attachmentsCount);
          }
        };
        return PDFAttachmentViewer;
      }();
      exports.PDFAttachmentViewer = PDFAttachmentViewer;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFOutlineViewer = {}, root.pdfjsWebPDFJS);
    }(this, function (exports, pdfjsLib) {
      var PDFJS = pdfjsLib.PDFJS;
      var DEFAULT_TITLE = '\u2013';
      /**
       * @typedef {Object} PDFOutlineViewerOptions
       * @property {HTMLDivElement} container - The viewer element.
       * @property {IPDFLinkService} linkService - The navigation/linking service.
       * @property {EventBus} eventBus - The application event bus.
       */
      /**
       * @typedef {Object} PDFOutlineViewerRenderParameters
       * @property {Array|null} outline - An array of outline objects.
       */
      /**
       * @class
       */
      var PDFOutlineViewer = function PDFOutlineViewerClosure() {
        /**
         * @constructs PDFOutlineViewer
         * @param {PDFOutlineViewerOptions} options
         */
        function PDFOutlineViewer(options) {
          this.outline = null;
          this.lastToggleIsShow = true;
          this.container = options.container;
          this.linkService = options.linkService;
          this.eventBus = options.eventBus;
        }
        PDFOutlineViewer.prototype = {
          reset: function PDFOutlineViewer_reset() {
            this.outline = null;
            this.lastToggleIsShow = true;
            var container = this.container;
            while (container.firstChild) {
              container.removeChild(container.firstChild);
            }
          },
          /**
           * @private
           */
          _dispatchEvent: function PDFOutlineViewer_dispatchEvent(outlineCount) {
            this.eventBus.dispatch('outlineloaded', {
              source: this,
              outlineCount: outlineCount
            });
          },
          /**
           * @private
           */
          _bindLink: function PDFOutlineViewer_bindLink(element, item) {
            if (item.url) {
              pdfjsLib.addLinkAttributes(element, {
                url: item.url,
                target: item.newWindow ? PDFJS.LinkTarget.BLANK : undefined
              });
              return;
            }
            var self = this, destination = item.dest;
            element.href = self.linkService.getDestinationHash(destination);
            element.onclick = function () {
              if (destination) {
                self.linkService.navigateTo(destination);
              }
              return false;
            };
          },
          /**
           * @private
           */
          _setStyles: function PDFOutlineViewer_setStyles(element, item) {
            var styleStr = '';
            if (item.bold) {
              styleStr += 'font-weight: bold;';
            }
            if (item.italic) {
              styleStr += 'font-style: italic;';
            }
            if (styleStr) {
              element.setAttribute('style', styleStr);
            }
          },
          /**
           * Prepend a button before an outline item which allows the user to toggle
           * the visibility of all outline items at that level.
           *
           * @private
           */
          _addToggleButton: function PDFOutlineViewer_addToggleButton(div) {
            var toggler = document.createElement('div');
            toggler.className = 'outlineItemToggler';
            toggler.onclick = function (event) {
              event.stopPropagation();
              toggler.classList.toggle('outlineItemsHidden');
              if (event.shiftKey) {
                var shouldShowAll = !toggler.classList.contains('outlineItemsHidden');
                this._toggleOutlineItem(div, shouldShowAll);
              }
            }.bind(this);
            div.insertBefore(toggler, div.firstChild);
          },
          /**
           * Toggle the visibility of the subtree of an outline item.
           *
           * @param {Element} root - the root of the outline (sub)tree.
           * @param {boolean} show - whether to show the outline (sub)tree. If false,
           *   the outline subtree rooted at |root| will be collapsed.
           *
           * @private
           */
          _toggleOutlineItem: function PDFOutlineViewer_toggleOutlineItem(root, show) {
            this.lastToggleIsShow = show;
            var togglers = root.querySelectorAll('.outlineItemToggler');
            for (var i = 0, ii = togglers.length; i < ii; ++i) {
              togglers[i].classList[show ? 'remove' : 'add']('outlineItemsHidden');
            }
          },
          /**
           * Collapse or expand all subtrees of the outline.
           */
          toggleOutlineTree: function PDFOutlineViewer_toggleOutlineTree() {
            if (!this.outline) {
              return;
            }
            this._toggleOutlineItem(this.container, !this.lastToggleIsShow);
          },
          /**
           * @param {PDFOutlineViewerRenderParameters} params
           */
          render: function PDFOutlineViewer_render(params) {
            var outline = params && params.outline || null;
            var outlineCount = 0;
            if (this.outline) {
              this.reset();
            }
            this.outline = outline;
            if (!outline) {
              this._dispatchEvent(outlineCount);
              return;
            }
            var fragment = document.createDocumentFragment();
            var queue = [{
                parent: fragment,
                items: this.outline
              }];
            var hasAnyNesting = false;
            while (queue.length > 0) {
              var levelData = queue.shift();
              for (var i = 0, len = levelData.items.length; i < len; i++) {
                var item = levelData.items[i];
                var div = document.createElement('div');
                div.className = 'outlineItem';
                var element = document.createElement('a');
                this._bindLink(element, item);
                this._setStyles(element, item);
                element.textContent = pdfjsLib.removeNullCharacters(item.title) || DEFAULT_TITLE;
                div.appendChild(element);
                if (item.items.length > 0) {
                  hasAnyNesting = true;
                  this._addToggleButton(div);
                  var itemsDiv = document.createElement('div');
                  itemsDiv.className = 'outlineItems';
                  div.appendChild(itemsDiv);
                  queue.push({
                    parent: itemsDiv,
                    items: item.items
                  });
                }
                levelData.parent.appendChild(div);
                outlineCount++;
              }
            }
            if (hasAnyNesting) {
              this.container.classList.add('outlineWithDeepNesting');
            }
            this.container.appendChild(fragment);
            this._dispatchEvent(outlineCount);
          }
        };
        return PDFOutlineViewer;
      }();
      exports.PDFOutlineViewer = PDFOutlineViewer;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFSidebar = {}, root.pdfjsWebPDFRenderingQueue);
    }(this, function (exports, pdfRenderingQueue) {
      var RenderingStates = pdfRenderingQueue.RenderingStates;
      var SidebarView = {
        NONE: 0,
        THUMBS: 1,
        OUTLINE: 2,
        ATTACHMENTS: 3
      };
      /**
       * @typedef {Object} PDFSidebarOptions
       * @property {PDFViewer} pdfViewer - The document viewer.
       * @property {PDFThumbnailViewer} pdfThumbnailViewer - The thumbnail viewer.
       * @property {PDFOutlineViewer} pdfOutlineViewer - The outline viewer.
       * @property {HTMLDivElement} mainContainer - The main container
       *   (in which the viewer element is placed).
       * @property {HTMLDivElement} outerContainer - The outer container
       *   (encasing both the viewer and sidebar elements).
       * @property {EventBus} eventBus - The application event bus.
       * @property {HTMLButtonElement} toggleButton - The button used for
       *   opening/closing the sidebar.
       * @property {HTMLButtonElement} thumbnailButton - The button used to show
       *   the thumbnail view.
       * @property {HTMLButtonElement} outlineButton - The button used to show
       *   the outline view.
       * @property {HTMLButtonElement} attachmentsButton - The button used to show
       *   the attachments view.
       * @property {HTMLDivElement} thumbnailView - The container in which
       *   the thumbnails are placed.
       * @property {HTMLDivElement} outlineView - The container in which
       *   the outline is placed.
       * @property {HTMLDivElement} attachmentsView - The container in which
       *   the attachments are placed.
       */
      /**
       * @class
       */
      var PDFSidebar = function PDFSidebarClosure() {
        /**
         * @constructs PDFSidebar
         * @param {PDFSidebarOptions} options
         */
        function PDFSidebar(options) {
          this.isOpen = false;
          this.active = SidebarView.THUMBS;
          this.isInitialViewSet = false;
          /**
           * Callback used when the sidebar has been opened/closed, to ensure that
           * the viewers (PDFViewer/PDFThumbnailViewer) are updated correctly.
           */
          this.onToggled = null;
          this.pdfViewer = options.pdfViewer;
          this.pdfThumbnailViewer = options.pdfThumbnailViewer;
          this.pdfOutlineViewer = options.pdfOutlineViewer;
          this.mainContainer = options.mainContainer;
          this.outerContainer = options.outerContainer;
          this.eventBus = options.eventBus;
          this.toggleButton = options.toggleButton;
          this.thumbnailButton = options.thumbnailButton;
          this.outlineButton = options.outlineButton;
          this.attachmentsButton = options.attachmentsButton;
          this.thumbnailView = options.thumbnailView;
          this.outlineView = options.outlineView;
          this.attachmentsView = options.attachmentsView;
          this._addEventListeners();
        }
        PDFSidebar.prototype = {
          reset: function PDFSidebar_reset() {
            this.isInitialViewSet = false;
            this.close();
            this.switchView(SidebarView.THUMBS);
            this.outlineButton.disabled = false;
            this.attachmentsButton.disabled = false;
          },
          /**
           * @returns {number} One of the values in {SidebarView}.
           */
          get visibleView() {
            return this.isOpen ? this.active : SidebarView.NONE;
          },
          get isThumbnailViewVisible() {
            return this.isOpen && this.active === SidebarView.THUMBS;
          },
          get isOutlineViewVisible() {
            return this.isOpen && this.active === SidebarView.OUTLINE;
          },
          get isAttachmentsViewVisible() {
            return this.isOpen && this.active === SidebarView.ATTACHMENTS;
          },
          /**
           * @param {number} view - The sidebar view that should become visible,
           *                        must be one of the values in {SidebarView}.
           */
          setInitialView: function PDFSidebar_setInitialView(view) {
            if (this.isInitialViewSet) {
              return;
            }
            this.isInitialViewSet = true;
            if (this.isOpen && view === SidebarView.NONE) {
              this._dispatchEvent();
              // If the user has already manually opened the sidebar,
              // immediately closing it would be bad UX.
              return;
            }
            var isViewPreserved = view === this.visibleView;
            this.switchView(view, /* forceOpen */
            true);
            if (isViewPreserved) {
              // Prevent dispatching two back-to-back `sidebarviewchanged` events,
              // since `this.switchView` dispatched the event if the view changed.
              this._dispatchEvent();
            }
          },
          /**
           * @param {number} view - The sidebar view that should be switched to,
           *                        must be one of the values in {SidebarView}.
           * @param {boolean} forceOpen - (optional) Ensure that the sidebar is open.
           *                              The default value is false.
           */
          switchView: function PDFSidebar_switchView(view, forceOpen) {
            if (view === SidebarView.NONE) {
              this.close();
              return;
            }
            var isViewChanged = view !== this.active;
            var shouldForceRendering = false;
            switch (view) {
            case SidebarView.THUMBS:
              this.thumbnailButton.classList.add('toggled');
              this.outlineButton.classList.remove('toggled');
              this.attachmentsButton.classList.remove('toggled');
              this.thumbnailView.classList.remove('hidden');
              this.outlineView.classList.add('hidden');
              this.attachmentsView.classList.add('hidden');
              if (this.isOpen && isViewChanged) {
                this._updateThumbnailViewer();
                shouldForceRendering = true;
              }
              break;
            case SidebarView.OUTLINE:
              if (this.outlineButton.disabled) {
                return;
              }
              this.thumbnailButton.classList.remove('toggled');
              this.outlineButton.classList.add('toggled');
              this.attachmentsButton.classList.remove('toggled');
              this.thumbnailView.classList.add('hidden');
              this.outlineView.classList.remove('hidden');
              this.attachmentsView.classList.add('hidden');
              break;
            case SidebarView.ATTACHMENTS:
              if (this.attachmentsButton.disabled) {
                return;
              }
              this.thumbnailButton.classList.remove('toggled');
              this.outlineButton.classList.remove('toggled');
              this.attachmentsButton.classList.add('toggled');
              this.thumbnailView.classList.add('hidden');
              this.outlineView.classList.add('hidden');
              this.attachmentsView.classList.remove('hidden');
              break;
            default:
              console.error('PDFSidebar_switchView: "' + view + '" is an unsupported value.');
              return;
            }
            // Update the active view *after* it has been validated above,
            // in order to prevent setting it to an invalid state.
            this.active = view | 0;
            if (forceOpen && !this.isOpen) {
              this.open();
              // NOTE: `this.open` will trigger rendering, and dispatch the event.
              return;
            }
            if (shouldForceRendering) {
              this._forceRendering();
            }
            if (isViewChanged) {
              this._dispatchEvent();
            }
          },
          open: function PDFSidebar_open() {
            if (this.isOpen) {
              return;
            }
            this.isOpen = true;
            this.toggleButton.classList.add('toggled');
            this.outerContainer.classList.add('sidebarMoving');
            this.outerContainer.classList.add('sidebarOpen');
            if (this.active === SidebarView.THUMBS) {
              this._updateThumbnailViewer();
            }
            this._forceRendering();
            this._dispatchEvent();
          },
          close: function PDFSidebar_close() {
            if (!this.isOpen) {
              return;
            }
            this.isOpen = false;
            this.toggleButton.classList.remove('toggled');
            this.outerContainer.classList.add('sidebarMoving');
            this.outerContainer.classList.remove('sidebarOpen');
            this._forceRendering();
            this._dispatchEvent();
          },
          toggle: function PDFSidebar_toggle() {
            if (this.isOpen) {
              this.close();
            } else {
              this.open();
            }
          },
          /**
           * @private
           */
          _dispatchEvent: function PDFSidebar_dispatchEvent() {
            this.eventBus.dispatch('sidebarviewchanged', {
              source: this,
              view: this.visibleView
            });
          },
          /**
           * @private
           */
          _forceRendering: function PDFSidebar_forceRendering() {
            if (this.onToggled) {
              this.onToggled();
            } else {
              // Fallback
              this.pdfViewer.forceRendering();
              this.pdfThumbnailViewer.forceRendering();
            }
          },
          /**
           * @private
           */
          _updateThumbnailViewer: function PDFSidebar_updateThumbnailViewer() {
            var pdfViewer = this.pdfViewer;
            var thumbnailViewer = this.pdfThumbnailViewer;
            // Use the rendered pages to set the corresponding thumbnail images.
            var pagesCount = pdfViewer.pagesCount;
            for (var pageIndex = 0; pageIndex < pagesCount; pageIndex++) {
              var pageView = pdfViewer.getPageView(pageIndex);
              if (pageView && pageView.renderingState === RenderingStates.FINISHED) {
                var thumbnailView = thumbnailViewer.getThumbnail(pageIndex);
                thumbnailView.setImage(pageView);
              }
            }
            thumbnailViewer.scrollThumbnailIntoView(pdfViewer.currentPageNumber);
          },
          /**
           * @private
           */
          _addEventListeners: function PDFSidebar_addEventListeners() {
            var self = this;
            self.mainContainer.addEventListener('transitionend', function (evt) {
              if (evt.target === /* mainContainer */
                this) {
                self.outerContainer.classList.remove('sidebarMoving');
              }
            });
            // Buttons for switching views.
            self.thumbnailButton.addEventListener('click', function () {
              self.switchView(SidebarView.THUMBS);
            });
            self.outlineButton.addEventListener('click', function () {
              self.switchView(SidebarView.OUTLINE);
            });
            self.outlineButton.addEventListener('dblclick', function () {
              self.pdfOutlineViewer.toggleOutlineTree();
            });
            self.attachmentsButton.addEventListener('click', function () {
              self.switchView(SidebarView.ATTACHMENTS);
            });
            // Disable/enable views.
            self.eventBus.on('outlineloaded', function (e) {
              var outlineCount = e.outlineCount;
              self.outlineButton.disabled = !outlineCount;
              if (!outlineCount && self.active === SidebarView.OUTLINE) {
                self.switchView(SidebarView.THUMBS);
              }
            });
            self.eventBus.on('attachmentsloaded', function (e) {
              var attachmentsCount = e.attachmentsCount;
              self.attachmentsButton.disabled = !attachmentsCount;
              if (!attachmentsCount && self.active === SidebarView.ATTACHMENTS) {
                self.switchView(SidebarView.THUMBS);
              }
            });
            // Update the thumbnailViewer, if visible, when exiting presentation mode.
            self.eventBus.on('presentationmodechanged', function (e) {
              if (!e.active && !e.switchInProgress && self.isThumbnailViewVisible) {
                self._updateThumbnailViewer();
              }
            });
          }
        };
        return PDFSidebar;
      }();
      exports.SidebarView = SidebarView;
      exports.PDFSidebar = PDFSidebar;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebUIUtils = {}, root.pdfjsWebPDFJS);
    }(this, function (exports, pdfjsLib) {
      var CSS_UNITS = 96.0 / 72.0;
      var DEFAULT_SCALE_VALUE = 'auto';
      var DEFAULT_SCALE = 1.0;
      var UNKNOWN_SCALE = 0;
      var MAX_AUTO_SCALE = 1.25;
      var SCROLLBAR_PADDING = 40;
      var VERTICAL_PADDING = 5;
      var mozL10n = document.mozL10n || document.webL10n;
      var PDFJS = pdfjsLib.PDFJS;
      /**
       * Disables fullscreen support, and by extension Presentation Mode,
       * in browsers which support the fullscreen API.
       * @var {boolean}
       */
      PDFJS.disableFullscreen = PDFJS.disableFullscreen === undefined ? false : PDFJS.disableFullscreen;
      /**
       * Enables CSS only zooming.
       * @var {boolean}
       */
      PDFJS.useOnlyCssZoom = PDFJS.useOnlyCssZoom === undefined ? false : PDFJS.useOnlyCssZoom;
      /**
       * The maximum supported canvas size in total pixels e.g. width * height.
       * The default value is 4096 * 4096. Use -1 for no limit.
       * @var {number}
       */
      PDFJS.maxCanvasPixels = PDFJS.maxCanvasPixels === undefined ? 16777216 : PDFJS.maxCanvasPixels;
      /**
       * Disables saving of the last position of the viewed PDF.
       * @var {boolean}
       */
      PDFJS.disableHistory = PDFJS.disableHistory === undefined ? false : PDFJS.disableHistory;
      /**
       * Disables creation of the text layer that used for text selection and search.
       * @var {boolean}
       */
      PDFJS.disableTextLayer = PDFJS.disableTextLayer === undefined ? false : PDFJS.disableTextLayer;
      /**
       * Disables maintaining the current position in the document when zooming.
       */
      PDFJS.ignoreCurrentPositionOnZoom = PDFJS.ignoreCurrentPositionOnZoom === undefined ? false : PDFJS.ignoreCurrentPositionOnZoom;
      /**
       * Returns scale factor for the canvas. It makes sense for the HiDPI displays.
       * @return {Object} The object with horizontal (sx) and vertical (sy)
                          scales. The scaled property is set to false if scaling is
                          not required, true otherwise.
       */
      function getOutputScale(ctx) {
        var devicePixelRatio = window.devicePixelRatio || 1;
        var backingStoreRatio = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1;
        var pixelRatio = devicePixelRatio / backingStoreRatio;
        return {
          sx: pixelRatio,
          sy: pixelRatio,
          scaled: pixelRatio !== 1
        };
      }
      /**
       * Scrolls specified element into view of its parent.
       * @param {Object} element - The element to be visible.
       * @param {Object} spot - An object with optional top and left properties,
       *   specifying the offset from the top left edge.
       * @param {boolean} skipOverflowHiddenElements - Ignore elements that have
       *   the CSS rule `overflow: hidden;` set. The default is false.
       */
      function scrollIntoView(element, spot, skipOverflowHiddenElements) {
        // Assuming offsetParent is available (it's not available when viewer is in
        // hidden iframe or object). We have to scroll: if the offsetParent is not set
        // producing the error. See also animationStartedClosure.
        var parent = element.offsetParent;
        if (!parent) {
          console.error('offsetParent is not set -- cannot scroll');
          return;
        }
        var checkOverflow = skipOverflowHiddenElements || false;
        var offsetY = element.offsetTop + element.clientTop;
        var offsetX = element.offsetLeft + element.clientLeft;
        while (parent.clientHeight === parent.scrollHeight || checkOverflow && getComputedStyle(parent).overflow === 'hidden') {
          if (parent.dataset._scaleY) {
            offsetY /= parent.dataset._scaleY;
            offsetX /= parent.dataset._scaleX;
          }
          offsetY += parent.offsetTop;
          offsetX += parent.offsetLeft;
          parent = parent.offsetParent;
          if (!parent) {
            return;
          }
        }
        // no need to scroll
        if (spot) {
          if (spot.top !== undefined) {
            offsetY += spot.top;
          }
          if (spot.left !== undefined) {
            offsetX += spot.left;
            parent.scrollLeft = offsetX;
          }
        }
        parent.scrollTop = offsetY;
      }
      /**
       * Helper function to start monitoring the scroll event and converting them into
       * PDF.js friendly one: with scroll debounce and scroll direction.
       */
      function watchScroll(viewAreaElement, callback) {
        var debounceScroll = function debounceScroll(evt) {
          if (rAF) {
            return;
          }
          // schedule an invocation of scroll for next animation frame.
          rAF = window.requestAnimationFrame(function viewAreaElementScrolled() {
            rAF = null;
            var currentY = viewAreaElement.scrollTop;
            var lastY = state.lastY;
            if (currentY !== lastY) {
              state.down = currentY > lastY;
            }
            state.lastY = currentY;
            callback(state);
          });
        };
        var state = {
          down: true,
          lastY: viewAreaElement.scrollTop,
          _eventHandler: debounceScroll
        };
        var rAF = null;
        viewAreaElement.addEventListener('scroll', debounceScroll, true);
        return state;
      }
      /**
       * Helper function to parse query string (e.g. ?param1=value&parm2=...).
       */
      function parseQueryString(query) {
        var parts = query.split('&');
        var params = {};
        for (var i = 0, ii = parts.length; i < ii; ++i) {
          var param = parts[i].split('=');
          var key = param[0].toLowerCase();
          var value = param.length > 1 ? param[1] : null;
          params[decodeURIComponent(key)] = decodeURIComponent(value);
        }
        return params;
      }
      /**
       * Use binary search to find the index of the first item in a given array which
       * passes a given condition. The items are expected to be sorted in the sense
       * that if the condition is true for one item in the array, then it is also true
       * for all following items.
       *
       * @returns {Number} Index of the first array element to pass the test,
       *                   or |items.length| if no such element exists.
       */
      function binarySearchFirstItem(items, condition) {
        var minIndex = 0;
        var maxIndex = items.length - 1;
        if (items.length === 0 || !condition(items[maxIndex])) {
          return items.length;
        }
        if (condition(items[minIndex])) {
          return minIndex;
        }
        while (minIndex < maxIndex) {
          var currentIndex = minIndex + maxIndex >> 1;
          var currentItem = items[currentIndex];
          if (condition(currentItem)) {
            maxIndex = currentIndex;
          } else {
            minIndex = currentIndex + 1;
          }
        }
        return minIndex;
      }
      /* === maxIndex */
      /**
       *  Approximates float number as a fraction using Farey sequence (max order
       *  of 8).
       *  @param {number} x - Positive float number.
       *  @returns {Array} Estimated fraction: the first array item is a numerator,
       *                   the second one is a denominator.
       */
      function approximateFraction(x) {
        // Fast paths for int numbers or their inversions.
        if (Math.floor(x) === x) {
          return [
            x,
            1
          ];
        }
        var xinv = 1 / x;
        var limit = 8;
        if (xinv > limit) {
          return [
            1,
            limit
          ];
        } else if (Math.floor(xinv) === xinv) {
          return [
            1,
            xinv
          ];
        }
        var x_ = x > 1 ? xinv : x;
        // a/b and c/d are neighbours in Farey sequence.
        var a = 0, b = 1, c = 1, d = 1;
        // Limiting search to order 8.
        while (true) {
          // Generating next term in sequence (order of q).
          var p = a + c, q = b + d;
          if (q > limit) {
            break;
          }
          if (x_ <= p / q) {
            c = p;
            d = q;
          } else {
            a = p;
            b = q;
          }
        }
        // Select closest of the neighbours to x.
        if (x_ - a / b < c / d - x_) {
          return x_ === x ? [
            a,
            b
          ] : [
            b,
            a
          ];
        } else {
          return x_ === x ? [
            c,
            d
          ] : [
            d,
            c
          ];
        }
      }
      function roundToDivide(x, div) {
        var r = x % div;
        return r === 0 ? x : Math.round(x - r + div);
      }
      /**
       * Generic helper to find out what elements are visible within a scroll pane.
       */
      function getVisibleElements(scrollEl, views, sortByVisibility) {
        var top = scrollEl.scrollTop, bottom = top + scrollEl.clientHeight;
        var left = scrollEl.scrollLeft, right = left + scrollEl.clientWidth;
        function isElementBottomBelowViewTop(view) {
          var element = view.div;
          var elementBottom = element.offsetTop + element.clientTop + element.clientHeight;
          return elementBottom > top;
        }
        var visible = [], view, element;
        var currentHeight, viewHeight, hiddenHeight, percentHeight;
        var currentWidth, viewWidth;
        var firstVisibleElementInd = views.length === 0 ? 0 : binarySearchFirstItem(views, isElementBottomBelowViewTop);
        for (var i = firstVisibleElementInd, ii = views.length; i < ii; i++) {
          view = views[i];
          element = view.div;
          currentHeight = element.offsetTop + element.clientTop;
          viewHeight = element.clientHeight;
          if (currentHeight > bottom) {
            break;
          }
          currentWidth = element.offsetLeft + element.clientLeft;
          viewWidth = element.clientWidth;
          if (currentWidth + viewWidth < left || currentWidth > right) {
            continue;
          }
          hiddenHeight = Math.max(0, top - currentHeight) + Math.max(0, currentHeight + viewHeight - bottom);
          percentHeight = (viewHeight - hiddenHeight) * 100 / viewHeight | 0;
          visible.push({
            id: view.id,
            x: currentWidth,
            y: currentHeight,
            view: view,
            percent: percentHeight
          });
        }
        var first = visible[0];
        var last = visible[visible.length - 1];
        if (sortByVisibility) {
          visible.sort(function (a, b) {
            var pc = a.percent - b.percent;
            if (Math.abs(pc) > 0.001) {
              return -pc;
            }
            return a.id - b.id;
          });
        }
        // ensure stability
        return {
          first: first,
          last: last,
          views: visible
        };
      }
      /**
       * Event handler to suppress context menu.
       */
      function noContextMenuHandler(e) {
        e.preventDefault();
      }
      /**
       * Returns the filename or guessed filename from the url (see issue 3455).
       * url {String} The original PDF location.
       * @return {String} Guessed PDF file name.
       */
      function getPDFFileNameFromURL(url) {
        var reURI = /^(?:([^:]+:)?\/\/[^\/]+)?([^?#]*)(\?[^#]*)?(#.*)?$/;
        //            SCHEME      HOST         1.PATH  2.QUERY   3.REF
        // Pattern to get last matching NAME.pdf
        var reFilename = /[^\/?#=]+\.pdf\b(?!.*\.pdf\b)/i;
        var splitURI = reURI.exec(url);
        var suggestedFilename = reFilename.exec(splitURI[1]) || reFilename.exec(splitURI[2]) || reFilename.exec(splitURI[3]);
        if (suggestedFilename) {
          suggestedFilename = suggestedFilename[0];
          if (suggestedFilename.indexOf('%') !== -1) {
            // URL-encoded %2Fpath%2Fto%2Ffile.pdf should be file.pdf
            try {
              suggestedFilename = reFilename.exec(decodeURIComponent(suggestedFilename))[0];
            } catch (e) {
            }
          }
        }
        return suggestedFilename || 'document.pdf';
      }
      function normalizeWheelEventDelta(evt) {
        var delta = Math.sqrt(evt.deltaX * evt.deltaX + evt.deltaY * evt.deltaY);
        var angle = Math.atan2(evt.deltaY, evt.deltaX);
        if (-0.25 * Math.PI < angle && angle < 0.75 * Math.PI) {
          // All that is left-up oriented has to change the sign.
          delta = -delta;
        }
        var MOUSE_DOM_DELTA_PIXEL_MODE = 0;
        var MOUSE_DOM_DELTA_LINE_MODE = 1;
        var MOUSE_PIXELS_PER_LINE = 30;
        var MOUSE_LINES_PER_PAGE = 30;
        // Converts delta to per-page units
        if (evt.deltaMode === MOUSE_DOM_DELTA_PIXEL_MODE) {
          delta /= MOUSE_PIXELS_PER_LINE * MOUSE_LINES_PER_PAGE;
        } else if (evt.deltaMode === MOUSE_DOM_DELTA_LINE_MODE) {
          delta /= MOUSE_LINES_PER_PAGE;
        }
        return delta;
      }
      /**
       * Simple event bus for an application. Listeners are attached using the
       * `on` and `off` methods. To raise an event, the `dispatch` method shall be
       * used.
       */
      var EventBus = function EventBusClosure() {
        function EventBus() {
          this._listeners = Object.create(null);
        }
        EventBus.prototype = {
          on: function EventBus_on(eventName, listener) {
            var eventListeners = this._listeners[eventName];
            if (!eventListeners) {
              eventListeners = [];
              this._listeners[eventName] = eventListeners;
            }
            eventListeners.push(listener);
          },
          off: function EventBus_on(eventName, listener) {
            var eventListeners = this._listeners[eventName];
            var i;
            if (!eventListeners || (i = eventListeners.indexOf(listener)) < 0) {
              return;
            }
            eventListeners.splice(i, 1);
          },
          dispatch: function EventBus_dispath(eventName) {
            var eventListeners = this._listeners[eventName];
            if (!eventListeners || eventListeners.length === 0) {
              return;
            }
            // Passing all arguments after the eventName to the listeners.
            var args = Array.prototype.slice.call(arguments, 1);
            // Making copy of the listeners array in case if it will be modified
            // during dispatch.
            eventListeners.slice(0).forEach(function (listener) {
              listener.apply(null, args);
            });
          }
        };
        return EventBus;
      }();
      var ProgressBar = function ProgressBarClosure() {
        function clamp(v, min, max) {
          return Math.min(Math.max(v, min), max);
        }
        function ProgressBar(id, opts) {
          this.visible = true;
          // Fetch the sub-elements for later.
          this.div = document.querySelector(id + ' .progress');
          // Get the loading bar element, so it can be resized to fit the viewer.
          this.bar = this.div.parentNode;
          // Get options, with sensible defaults.
          this.height = opts.height || 100;
          this.width = opts.width || 100;
          this.units = opts.units || '%';
          // Initialize heights.
          this.div.style.height = this.height + this.units;
          this.percent = 0;
        }
        ProgressBar.prototype = {
          updateBar: function ProgressBar_updateBar() {
            if (this._indeterminate) {
              this.div.classList.add('indeterminate');
              this.div.style.width = this.width + this.units;
              return;
            }
            this.div.classList.remove('indeterminate');
            var progressSize = this.width * this._percent / 100;
            this.div.style.width = progressSize + this.units;
          },
          get percent() {
            return this._percent;
          },
          set percent(val) {
            this._indeterminate = isNaN(val);
            this._percent = clamp(val, 0, 100);
            this.updateBar();
          },
          setWidth: function ProgressBar_setWidth(viewer) {
            if (viewer) {
              var container = viewer.parentNode;
              var scrollbarWidth = container.offsetWidth - viewer.offsetWidth;
              if (scrollbarWidth > 0) {
                this.bar.setAttribute('style', 'width: calc(100% - ' + scrollbarWidth + 'px);');
              }
            }
          },
          hide: function ProgressBar_hide() {
            if (!this.visible) {
              return;
            }
            this.visible = false;
            this.bar.classList.add('hidden');
            document.body.classList.remove('loadingInProgress');
          },
          show: function ProgressBar_show() {
            if (this.visible) {
              return;
            }
            this.visible = true;
            document.body.classList.add('loadingInProgress');
            this.bar.classList.remove('hidden');
          }
        };
        return ProgressBar;
      }();
      exports.CSS_UNITS = CSS_UNITS;
      exports.DEFAULT_SCALE_VALUE = DEFAULT_SCALE_VALUE;
      exports.DEFAULT_SCALE = DEFAULT_SCALE;
      exports.UNKNOWN_SCALE = UNKNOWN_SCALE;
      exports.MAX_AUTO_SCALE = MAX_AUTO_SCALE;
      exports.SCROLLBAR_PADDING = SCROLLBAR_PADDING;
      exports.VERTICAL_PADDING = VERTICAL_PADDING;
      exports.mozL10n = mozL10n;
      exports.EventBus = EventBus;
      exports.ProgressBar = ProgressBar;
      exports.getPDFFileNameFromURL = getPDFFileNameFromURL;
      exports.noContextMenuHandler = noContextMenuHandler;
      exports.parseQueryString = parseQueryString;
      exports.getVisibleElements = getVisibleElements;
      exports.roundToDivide = roundToDivide;
      exports.approximateFraction = approximateFraction;
      exports.getOutputScale = getOutputScale;
      exports.scrollIntoView = scrollIntoView;
      exports.watchScroll = watchScroll;
      exports.binarySearchFirstItem = binarySearchFirstItem;
      exports.normalizeWheelEventDelta = normalizeWheelEventDelta;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebDOMEvents = {}, root.pdfjsWebUIUtils);
    }(this, function (exports, uiUtils) {
      var EventBus = uiUtils.EventBus;
      // Attaching to the application event bus to dispatch events to the DOM for
      // backwards viewer API compatibility.
      function attachDOMEventsToEventBus(eventBus) {
        eventBus.on('documentload', function () {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('documentload', true, true, {});
          window.dispatchEvent(event);
        });
        eventBus.on('pagerendered', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('pagerendered', true, true, {
            pageNumber: e.pageNumber,
            cssTransform: e.cssTransform
          });
          e.source.div.dispatchEvent(event);
        });
        eventBus.on('textlayerrendered', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('textlayerrendered', true, true, { pageNumber: e.pageNumber });
          e.source.textLayerDiv.dispatchEvent(event);
        });
        eventBus.on('pagechange', function (e) {
          var event = document.createEvent('UIEvents');
          event.initUIEvent('pagechange', true, true, window, 0);
          event.pageNumber = e.pageNumber;
          e.source.container.dispatchEvent(event);
        });
        eventBus.on('pagesinit', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('pagesinit', true, true, null);
          e.source.container.dispatchEvent(event);
        });
        eventBus.on('pagesloaded', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('pagesloaded', true, true, { pagesCount: e.pagesCount });
          e.source.container.dispatchEvent(event);
        });
        eventBus.on('scalechange', function (e) {
          var event = document.createEvent('UIEvents');
          event.initUIEvent('scalechange', true, true, window, 0);
          event.scale = e.scale;
          event.presetValue = e.presetValue;
          e.source.container.dispatchEvent(event);
        });
        eventBus.on('updateviewarea', function (e) {
          var event = document.createEvent('UIEvents');
          event.initUIEvent('updateviewarea', true, true, window, 0);
          event.location = e.location;
          e.source.container.dispatchEvent(event);
        });
        eventBus.on('find', function (e) {
          if (e.source === window) {
            return;
          }
          // event comes from FirefoxCom, no need to replicate
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('find' + e.type, true, true, {
            query: e.query,
            phraseSearch: e.phraseSearch,
            caseSensitive: e.caseSensitive,
            highlightAll: e.highlightAll,
            findPrevious: e.findPrevious
          });
          window.dispatchEvent(event);
        });
        eventBus.on('attachmentsloaded', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('attachmentsloaded', true, true, { attachmentsCount: e.attachmentsCount });
          e.source.container.dispatchEvent(event);
        });
        eventBus.on('sidebarviewchanged', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('sidebarviewchanged', true, true, { view: e.view });
          e.source.outerContainer.dispatchEvent(event);
        });
        eventBus.on('pagemode', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('pagemode', true, true, { mode: e.mode });
          e.source.pdfViewer.container.dispatchEvent(event);
        });
        eventBus.on('namedaction', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('namedaction', true, true, { action: e.action });
          e.source.pdfViewer.container.dispatchEvent(event);
        });
        eventBus.on('presentationmodechanged', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('presentationmodechanged', true, true, {
            active: e.active,
            switchInProgress: e.switchInProgress
          });
          window.dispatchEvent(event);
        });
        eventBus.on('outlineloaded', function (e) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('outlineloaded', true, true, { outlineCount: e.outlineCount });
          e.source.container.dispatchEvent(event);
        });
      }
      var globalEventBus = null;
      function getGlobalEventBus() {
        if (globalEventBus) {
          return globalEventBus;
        }
        globalEventBus = new EventBus();
        attachDOMEventsToEventBus(globalEventBus);
        return globalEventBus;
      }
      exports.attachDOMEventsToEventBus = attachDOMEventsToEventBus;
      exports.getGlobalEventBus = getGlobalEventBus;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPasswordPrompt = {}, root.pdfjsWebUIUtils, root.pdfjsWebOverlayManager, root.pdfjsWebPDFJS);
    }(this, function (exports, uiUtils, overlayManager, pdfjsLib) {
      var mozL10n = uiUtils.mozL10n;
      var OverlayManager = overlayManager.OverlayManager;
      /**
       * @typedef {Object} PasswordPromptOptions
       * @property {string} overlayName - Name of the overlay for the overlay manager.
       * @property {HTMLDivElement} container - Div container for the overlay.
       * @property {HTMLParagraphElement} label - Label containing instructions for
       *                                          entering the password.
       * @property {HTMLInputElement} input - Input field for entering the password.
       * @property {HTMLButtonElement} submitButton - Button for submitting the
       *                                              password.
       * @property {HTMLButtonElement} cancelButton - Button for cancelling password
       *                                              entry.
       */
      /**
       * @class
       */
      var PasswordPrompt = function PasswordPromptClosure() {
        /**
         * @constructs PasswordPrompt
         * @param {PasswordPromptOptions} options
         */
        function PasswordPrompt(options) {
          this.overlayName = options.overlayName;
          this.container = options.container;
          this.label = options.label;
          this.input = options.input;
          this.submitButton = options.submitButton;
          this.cancelButton = options.cancelButton;
          this.updateCallback = null;
          this.reason = null;
          // Attach the event listeners.
          this.submitButton.addEventListener('click', this.verify.bind(this));
          this.cancelButton.addEventListener('click', this.close.bind(this));
          this.input.addEventListener('keydown', function (e) {
            if (e.keyCode === 13) {
              // Enter key
              this.verify();
            }
          }.bind(this));
          OverlayManager.register(this.overlayName, this.container, this.close.bind(this), true);
        }
        PasswordPrompt.prototype = {
          open: function PasswordPrompt_open() {
            OverlayManager.open(this.overlayName).then(function () {
              this.input.type = 'password';
              this.input.focus();
              var promptString = mozL10n.get('password_label', null, 'Enter the password to open this PDF file.');
              if (this.reason === pdfjsLib.PasswordResponses.INCORRECT_PASSWORD) {
                promptString = mozL10n.get('password_invalid', null, 'Invalid password. Please try again.');
              }
              this.label.textContent = promptString;
            }.bind(this));
          },
          close: function PasswordPrompt_close() {
            OverlayManager.close(this.overlayName).then(function () {
              this.input.value = '';
              this.input.type = '';
            }.bind(this));
          },
          verify: function PasswordPrompt_verify() {
            var password = this.input.value;
            if (password && password.length > 0) {
              this.close();
              return this.updateCallback(password);
            }
          },
          setUpdateCallback: function PasswordPrompt_setUpdateCallback(updateCallback, reason) {
            this.updateCallback = updateCallback;
            this.reason = reason;
          }
        };
        return PasswordPrompt;
      }();
      exports.PasswordPrompt = PasswordPrompt;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFDocumentProperties = {}, root.pdfjsWebUIUtils, root.pdfjsWebOverlayManager);
    }(this, function (exports, uiUtils, overlayManager) {
      var getPDFFileNameFromURL = uiUtils.getPDFFileNameFromURL;
      var mozL10n = uiUtils.mozL10n;
      var OverlayManager = overlayManager.OverlayManager;
      /**
       * @typedef {Object} PDFDocumentPropertiesOptions
       * @property {string} overlayName - Name/identifier for the overlay.
       * @property {Object} fields - Names and elements of the overlay's fields.
       * @property {HTMLButtonElement} closeButton - Button for closing the overlay.
       */
      /**
       * @class
       */
      var PDFDocumentProperties = function PDFDocumentPropertiesClosure() {
        /**
         * @constructs PDFDocumentProperties
         * @param {PDFDocumentPropertiesOptions} options
         */
        function PDFDocumentProperties(options) {
          this.fields = options.fields;
          this.overlayName = options.overlayName;
          this.container = options.container;
          this.rawFileSize = 0;
          this.url = null;
          this.pdfDocument = null;
          // Bind the event listener for the Close button.
          if (options.closeButton) {
            options.closeButton.addEventListener('click', this.close.bind(this));
          }
          this.dataAvailablePromise = new Promise(function (resolve) {
            this.resolveDataAvailable = resolve;
          }.bind(this));
          OverlayManager.register(this.overlayName, this.container, this.close.bind(this));
        }
        PDFDocumentProperties.prototype = {
          /**
           * Open the document properties overlay.
           */
          open: function PDFDocumentProperties_open() {
            Promise.all([
              OverlayManager.open(this.overlayName),
              this.dataAvailablePromise
            ]).then(function () {
              this._getProperties();
            }.bind(this));
          },
          /**
           * Close the document properties overlay.
           */
          close: function PDFDocumentProperties_close() {
            OverlayManager.close(this.overlayName);
          },
          /**
           * Set the file size of the PDF document. This method is used to
           * update the file size in the document properties overlay once it
           * is known so we do not have to wait until the entire file is loaded.
           *
           * @param {number} fileSize - The file size of the PDF document.
           */
          setFileSize: function PDFDocumentProperties_setFileSize(fileSize) {
            if (fileSize > 0) {
              this.rawFileSize = fileSize;
            }
          },
          /**
           * Set a reference to the PDF document and the URL in order
           * to populate the overlay fields with the document properties.
           * Note that the overlay will contain no information if this method
           * is not called.
           *
           * @param {Object} pdfDocument - A reference to the PDF document.
           * @param {string} url - The URL of the document.
           */
          setDocumentAndUrl: function PDFDocumentProperties_setDocumentAndUrl(pdfDocument, url) {
            this.pdfDocument = pdfDocument;
            this.url = url;
            this.resolveDataAvailable();
          },
          /**
           * @private
           */
          _getProperties: function PDFDocumentProperties_getProperties() {
            if (!OverlayManager.active) {
              // If the dialog was closed before dataAvailablePromise was resolved,
              // don't bother updating the properties.
              return;
            }
            // Get the file size (if it hasn't already been set).
            this.pdfDocument.getDownloadInfo().then(function (data) {
              if (data.length === this.rawFileSize) {
                return;
              }
              this.setFileSize(data.length);
              this._updateUI(this.fields['fileSize'], this._parseFileSize());
            }.bind(this));
            // Get the document properties.
            this.pdfDocument.getMetadata().then(function (data) {
              var content = {
                'fileName': getPDFFileNameFromURL(this.url),
                'fileSize': this._parseFileSize(),
                'title': data.info.Title,
                'author': data.info.Author,
                'subject': data.info.Subject,
                'keywords': data.info.Keywords,
                'creationDate': this._parseDate(data.info.CreationDate),
                'modificationDate': this._parseDate(data.info.ModDate),
                'creator': data.info.Creator,
                'producer': data.info.Producer,
                'version': data.info.PDFFormatVersion,
                'pageCount': this.pdfDocument.numPages
              };
              // Show the properties in the dialog.
              for (var identifier in content) {
                this._updateUI(this.fields[identifier], content[identifier]);
              }
            }.bind(this));
          },
          /**
           * @private
           */
          _updateUI: function PDFDocumentProperties_updateUI(field, content) {
            if (field && content !== undefined && content !== '') {
              field.textContent = content;
            }
          },
          /**
           * @private
           */
          _parseFileSize: function PDFDocumentProperties_parseFileSize() {
            var fileSize = this.rawFileSize, kb = fileSize / 1024;
            if (!kb) {
              return;
            } else if (kb < 1024) {
              return mozL10n.get('document_properties_kb', {
                size_kb: (+kb.toPrecision(3)).toLocaleString(),
                size_b: fileSize.toLocaleString()
              }, '{{size_kb}} KB ({{size_b}} bytes)');
            } else {
              return mozL10n.get('document_properties_mb', {
                size_mb: (+(kb / 1024).toPrecision(3)).toLocaleString(),
                size_b: fileSize.toLocaleString()
              }, '{{size_mb}} MB ({{size_b}} bytes)');
            }
          },
          /**
           * @private
           */
          _parseDate: function PDFDocumentProperties_parseDate(inputDate) {
            // This is implemented according to the PDF specification, but note that
            // Adobe Reader doesn't handle changing the date to universal time
            // and doesn't use the user's time zone (they're effectively ignoring
            // the HH' and mm' parts of the date string).
            var dateToParse = inputDate;
            if (dateToParse === undefined) {
              return '';
            }
            // Remove the D: prefix if it is available.
            if (dateToParse.substring(0, 2) === 'D:') {
              dateToParse = dateToParse.substring(2);
            }
            // Get all elements from the PDF date string.
            // JavaScript's Date object expects the month to be between
            // 0 and 11 instead of 1 and 12, so we're correcting for this.
            var year = parseInt(dateToParse.substring(0, 4), 10);
            var month = parseInt(dateToParse.substring(4, 6), 10) - 1;
            var day = parseInt(dateToParse.substring(6, 8), 10);
            var hours = parseInt(dateToParse.substring(8, 10), 10);
            var minutes = parseInt(dateToParse.substring(10, 12), 10);
            var seconds = parseInt(dateToParse.substring(12, 14), 10);
            var utRel = dateToParse.substring(14, 15);
            var offsetHours = parseInt(dateToParse.substring(15, 17), 10);
            var offsetMinutes = parseInt(dateToParse.substring(18, 20), 10);
            // As per spec, utRel = 'Z' means equal to universal time.
            // The other cases ('-' and '+') have to be handled here.
            if (utRel === '-') {
              hours += offsetHours;
              minutes += offsetMinutes;
            } else if (utRel === '+') {
              hours -= offsetHours;
              minutes -= offsetMinutes;
            }
            // Return the new date format from the user's locale.
            var date = new Date(Date.UTC(year, month, day, hours, minutes, seconds));
            var dateString = date.toLocaleDateString();
            var timeString = date.toLocaleTimeString();
            return mozL10n.get('document_properties_date_string', {
              date: dateString,
              time: timeString
            }, '{{date}}, {{time}}');
          }
        };
        return PDFDocumentProperties;
      }();
      exports.PDFDocumentProperties = PDFDocumentProperties;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFFindController = {}, root.pdfjsWebUIUtils);
    }(this, function (exports, uiUtils) {
      var scrollIntoView = uiUtils.scrollIntoView;
      var FindStates = {
        FIND_FOUND: 0,
        FIND_NOTFOUND: 1,
        FIND_WRAPPED: 2,
        FIND_PENDING: 3
      };
      var FIND_SCROLL_OFFSET_TOP = -50;
      var FIND_SCROLL_OFFSET_LEFT = -400;
      var CHARACTERS_TO_NORMALIZE = {
        '\u2018': '\'',
        // Left single quotation mark
        '\u2019': '\'',
        // Right single quotation mark
        '\u201A': '\'',
        // Single low-9 quotation mark
        '\u201B': '\'',
        // Single high-reversed-9 quotation mark
        '\u201C': '"',
        // Left double quotation mark
        '\u201D': '"',
        // Right double quotation mark
        '\u201E': '"',
        // Double low-9 quotation mark
        '\u201F': '"',
        // Double high-reversed-9 quotation mark
        '\u00BC': '1/4',
        // Vulgar fraction one quarter
        '\u00BD': '1/2',
        // Vulgar fraction one half
        '\u00BE': '3/4'
      };
      // Vulgar fraction three quarters
      /**
       * Provides "search" or "find" functionality for the PDF.
       * This object actually performs the search for a given string.
       */
      var PDFFindController = function PDFFindControllerClosure() {
        function PDFFindController(options) {
          this.pdfViewer = options.pdfViewer || null;
          this.onUpdateResultsCount = null;
          this.onUpdateState = null;
          this.reset();
          // Compile the regular expression for text normalization once.
          var replace = Object.keys(CHARACTERS_TO_NORMALIZE).join('');
          this.normalizationRegex = new RegExp('[' + replace + ']', 'g');
        }
        PDFFindController.prototype = {
          reset: function PDFFindController_reset() {
            this.startedTextExtraction = false;
            this.extractTextPromises = [];
            this.pendingFindMatches = Object.create(null);
            this.active = false;
            // If active, find results will be highlighted.
            this.pageContents = [];
            // Stores the text for each page.
            this.pageMatches = [];
            this.pageMatchesLength = null;
            this.matchCount = 0;
            this.selected = {
              // Currently selected match.
              pageIdx: -1,
              matchIdx: -1
            };
            this.offset = {
              // Where the find algorithm currently is in the document.
              pageIdx: null,
              matchIdx: null
            };
            this.pagesToSearch = null;
            this.resumePageIdx = null;
            this.state = null;
            this.dirtyMatch = false;
            this.findTimeout = null;
            this.firstPagePromise = new Promise(function (resolve) {
              this.resolveFirstPage = resolve;
            }.bind(this));
          },
          normalize: function PDFFindController_normalize(text) {
            return text.replace(this.normalizationRegex, function (ch) {
              return CHARACTERS_TO_NORMALIZE[ch];
            });
          },
          // Helper for multiple search - fills matchesWithLength array
          // and takes into account cases when one search term
          // include another search term (for example, "tamed tame" or "this is").
          // Looking for intersecting terms in the 'matches' and
          // leave elements with a longer match-length.
          _prepareMatches: function PDFFindController_prepareMatches(matchesWithLength, matches, matchesLength) {
            function isSubTerm(matchesWithLength, currentIndex) {
              var currentElem, prevElem, nextElem;
              currentElem = matchesWithLength[currentIndex];
              nextElem = matchesWithLength[currentIndex + 1];
              // checking for cases like "TAMEd TAME"
              if (currentIndex < matchesWithLength.length - 1 && currentElem.match === nextElem.match) {
                currentElem.skipped = true;
                return true;
              }
              // checking for cases like "thIS IS"
              for (var i = currentIndex - 1; i >= 0; i--) {
                prevElem = matchesWithLength[i];
                if (prevElem.skipped) {
                  continue;
                }
                if (prevElem.match + prevElem.matchLength < currentElem.match) {
                  break;
                }
                if (prevElem.match + prevElem.matchLength >= currentElem.match + currentElem.matchLength) {
                  currentElem.skipped = true;
                  return true;
                }
              }
              return false;
            }
            var i, len;
            // Sorting array of objects { match: <match>, matchLength: <matchLength> }
            // in increasing index first and then the lengths.
            matchesWithLength.sort(function (a, b) {
              return a.match === b.match ? a.matchLength - b.matchLength : a.match - b.match;
            });
            for (i = 0, len = matchesWithLength.length; i < len; i++) {
              if (isSubTerm(matchesWithLength, i)) {
                continue;
              }
              matches.push(matchesWithLength[i].match);
              matchesLength.push(matchesWithLength[i].matchLength);
            }
          },
          calcFindPhraseMatch: function PDFFindController_calcFindPhraseMatch(query, pageIndex, pageContent) {
            var matches = [];
            var queryLen = query.length;
            var matchIdx = -queryLen;
            while (true) {
              matchIdx = pageContent.indexOf(query, matchIdx + queryLen);
              if (matchIdx === -1) {
                break;
              }
              matches.push(matchIdx);
            }
            this.pageMatches[pageIndex] = matches;
          },
          calcFindWordMatch: function PDFFindController_calcFindWordMatch(query, pageIndex, pageContent) {
            var matchesWithLength = [];
            // Divide the query into pieces and search for text on each piece.
            var queryArray = query.match(/\S+/g);
            var subquery, subqueryLen, matchIdx;
            for (var i = 0, len = queryArray.length; i < len; i++) {
              subquery = queryArray[i];
              subqueryLen = subquery.length;
              matchIdx = -subqueryLen;
              while (true) {
                matchIdx = pageContent.indexOf(subquery, matchIdx + subqueryLen);
                if (matchIdx === -1) {
                  break;
                }
                // Other searches do not, so we store the length.
                matchesWithLength.push({
                  match: matchIdx,
                  matchLength: subqueryLen,
                  skipped: false
                });
              }
            }
            // Prepare arrays for store the matches.
            if (!this.pageMatchesLength) {
              this.pageMatchesLength = [];
            }
            this.pageMatchesLength[pageIndex] = [];
            this.pageMatches[pageIndex] = [];
            // Sort matchesWithLength, clean up intersecting terms
            // and put the result into the two arrays.
            this._prepareMatches(matchesWithLength, this.pageMatches[pageIndex], this.pageMatchesLength[pageIndex]);
          },
          calcFindMatch: function PDFFindController_calcFindMatch(pageIndex) {
            var pageContent = this.normalize(this.pageContents[pageIndex]);
            var query = this.normalize(this.state.query);
            var caseSensitive = this.state.caseSensitive;
            var phraseSearch = this.state.phraseSearch;
            var queryLen = query.length;
            if (queryLen === 0) {
              // Do nothing: the matches should be wiped out already.
              return;
            }
            if (!caseSensitive) {
              pageContent = pageContent.toLowerCase();
              query = query.toLowerCase();
            }
            if (phraseSearch) {
              this.calcFindPhraseMatch(query, pageIndex, pageContent);
            } else {
              this.calcFindWordMatch(query, pageIndex, pageContent);
            }
            this.updatePage(pageIndex);
            if (this.resumePageIdx === pageIndex) {
              this.resumePageIdx = null;
              this.nextPageMatch();
            }
            // Update the matches count
            if (this.pageMatches[pageIndex].length > 0) {
              this.matchCount += this.pageMatches[pageIndex].length;
              this.updateUIResultsCount();
            }
          },
          extractText: function PDFFindController_extractText() {
            if (this.startedTextExtraction) {
              return;
            }
            this.startedTextExtraction = true;
            this.pageContents = [];
            var extractTextPromisesResolves = [];
            var numPages = this.pdfViewer.pagesCount;
            for (var i = 0; i < numPages; i++) {
              this.extractTextPromises.push(new Promise(function (resolve) {
                extractTextPromisesResolves.push(resolve);
              }));
            }
            var self = this;
            function extractPageText(pageIndex) {
              self.pdfViewer.getPageTextContent(pageIndex).then(function textContentResolved(textContent) {
                var textItems = textContent.items;
                var str = [];
                for (var i = 0, len = textItems.length; i < len; i++) {
                  str.push(textItems[i].str);
                }
                // Store the pageContent as a string.
                self.pageContents.push(str.join(''));
                extractTextPromisesResolves[pageIndex](pageIndex);
                if (pageIndex + 1 < self.pdfViewer.pagesCount) {
                  extractPageText(pageIndex + 1);
                }
              });
            }
            extractPageText(0);
          },
          executeCommand: function PDFFindController_executeCommand(cmd, state) {
            if (this.state === null || cmd !== 'findagain') {
              this.dirtyMatch = true;
            }
            this.state = state;
            this.updateUIState(FindStates.FIND_PENDING);
            this.firstPagePromise.then(function () {
              this.extractText();
              clearTimeout(this.findTimeout);
              if (cmd === 'find') {
                // Only trigger the find action after 250ms of silence.
                this.findTimeout = setTimeout(this.nextMatch.bind(this), 250);
              } else {
                this.nextMatch();
              }
            }.bind(this));
          },
          updatePage: function PDFFindController_updatePage(index) {
            if (this.selected.pageIdx === index) {
              // If the page is selected, scroll the page into view, which triggers
              // rendering the page, which adds the textLayer. Once the textLayer is
              // build, it will scroll onto the selected match.
              this.pdfViewer.currentPageNumber = index + 1;
            }
            var page = this.pdfViewer.getPageView(index);
            if (page.textLayer) {
              page.textLayer.updateMatches();
            }
          },
          nextMatch: function PDFFindController_nextMatch() {
            var previous = this.state.findPrevious;
            var currentPageIndex = this.pdfViewer.currentPageNumber - 1;
            var numPages = this.pdfViewer.pagesCount;
            this.active = true;
            if (this.dirtyMatch) {
              // Need to recalculate the matches, reset everything.
              this.dirtyMatch = false;
              this.selected.pageIdx = this.selected.matchIdx = -1;
              this.offset.pageIdx = currentPageIndex;
              this.offset.matchIdx = null;
              this.hadMatch = false;
              this.resumePageIdx = null;
              this.pageMatches = [];
              this.matchCount = 0;
              this.pageMatchesLength = null;
              var self = this;
              for (var i = 0; i < numPages; i++) {
                // Wipe out any previous highlighted matches.
                this.updatePage(i);
                // As soon as the text is extracted start finding the matches.
                if (!(i in this.pendingFindMatches)) {
                  this.pendingFindMatches[i] = true;
                  this.extractTextPromises[i].then(function (pageIdx) {
                    delete self.pendingFindMatches[pageIdx];
                    self.calcFindMatch(pageIdx);
                  });
                }
              }
            }
            // If there's no query there's no point in searching.
            if (this.state.query === '') {
              this.updateUIState(FindStates.FIND_FOUND);
              return;
            }
            // If we're waiting on a page, we return since we can't do anything else.
            if (this.resumePageIdx) {
              return;
            }
            var offset = this.offset;
            // Keep track of how many pages we should maximally iterate through.
            this.pagesToSearch = numPages;
            // If there's already a matchIdx that means we are iterating through a
            // page's matches.
            if (offset.matchIdx !== null) {
              var numPageMatches = this.pageMatches[offset.pageIdx].length;
              if (!previous && offset.matchIdx + 1 < numPageMatches || previous && offset.matchIdx > 0) {
                // The simple case; we just have advance the matchIdx to select
                // the next match on the page.
                this.hadMatch = true;
                offset.matchIdx = previous ? offset.matchIdx - 1 : offset.matchIdx + 1;
                this.updateMatch(true);
                return;
              }
              // We went beyond the current page's matches, so we advance to
              // the next page.
              this.advanceOffsetPage(previous);
            }
            // Start searching through the page.
            this.nextPageMatch();
          },
          matchesReady: function PDFFindController_matchesReady(matches) {
            var offset = this.offset;
            var numMatches = matches.length;
            var previous = this.state.findPrevious;
            if (numMatches) {
              // There were matches for the page, so initialize the matchIdx.
              this.hadMatch = true;
              offset.matchIdx = previous ? numMatches - 1 : 0;
              this.updateMatch(true);
              return true;
            } else {
              // No matches, so attempt to search the next page.
              this.advanceOffsetPage(previous);
              if (offset.wrapped) {
                offset.matchIdx = null;
                if (this.pagesToSearch < 0) {
                  // No point in wrapping again, there were no matches.
                  this.updateMatch(false);
                  // while matches were not found, searching for a page
                  // with matches should nevertheless halt.
                  return true;
                }
              }
              // Matches were not found (and searching is not done).
              return false;
            }
          },
          /**
           * The method is called back from the text layer when match presentation
           * is updated.
           * @param {number} pageIndex - page index.
           * @param {number} index - match index.
           * @param {Array} elements - text layer div elements array.
           * @param {number} beginIdx - start index of the div array for the match.
           */
          updateMatchPosition: function PDFFindController_updateMatchPosition(pageIndex, index, elements, beginIdx) {
            if (this.selected.matchIdx === index && this.selected.pageIdx === pageIndex) {
              var spot = {
                top: FIND_SCROLL_OFFSET_TOP,
                left: FIND_SCROLL_OFFSET_LEFT
              };
              scrollIntoView(elements[beginIdx], spot, /* skipOverflowHiddenElements = */
              true);
            }
          },
          nextPageMatch: function PDFFindController_nextPageMatch() {
            if (this.resumePageIdx !== null) {
              console.error('There can only be one pending page.');
            }
            do {
              var pageIdx = this.offset.pageIdx;
              var matches = this.pageMatches[pageIdx];
              if (!matches) {
                // The matches don't exist yet for processing by "matchesReady",
                // so set a resume point for when they do exist.
                this.resumePageIdx = pageIdx;
                break;
              }
            } while (!this.matchesReady(matches));
          },
          advanceOffsetPage: function PDFFindController_advanceOffsetPage(previous) {
            var offset = this.offset;
            var numPages = this.extractTextPromises.length;
            offset.pageIdx = previous ? offset.pageIdx - 1 : offset.pageIdx + 1;
            offset.matchIdx = null;
            this.pagesToSearch--;
            if (offset.pageIdx >= numPages || offset.pageIdx < 0) {
              offset.pageIdx = previous ? numPages - 1 : 0;
              offset.wrapped = true;
            }
          },
          updateMatch: function PDFFindController_updateMatch(found) {
            var state = FindStates.FIND_NOTFOUND;
            var wrapped = this.offset.wrapped;
            this.offset.wrapped = false;
            if (found) {
              var previousPage = this.selected.pageIdx;
              this.selected.pageIdx = this.offset.pageIdx;
              this.selected.matchIdx = this.offset.matchIdx;
              state = wrapped ? FindStates.FIND_WRAPPED : FindStates.FIND_FOUND;
              // Update the currently selected page to wipe out any selected matches.
              if (previousPage !== -1 && previousPage !== this.selected.pageIdx) {
                this.updatePage(previousPage);
              }
            }
            this.updateUIState(state, this.state.findPrevious);
            if (this.selected.pageIdx !== -1) {
              this.updatePage(this.selected.pageIdx);
            }
          },
          updateUIResultsCount: function PDFFindController_updateUIResultsCount() {
            if (this.onUpdateResultsCount) {
              this.onUpdateResultsCount(this.matchCount);
            }
          },
          updateUIState: function PDFFindController_updateUIState(state, previous) {
            if (this.onUpdateState) {
              this.onUpdateState(state, previous, this.matchCount);
            }
          }
        };
        return PDFFindController;
      }();
      exports.FindStates = FindStates;
      exports.PDFFindController = PDFFindController;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFPresentationMode = {}, root.pdfjsWebUIUtils);
    }(this, function (exports, uiUtils) {
      var normalizeWheelEventDelta = uiUtils.normalizeWheelEventDelta;
      var DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS = 1500;
      // in ms
      var DELAY_BEFORE_HIDING_CONTROLS = 3000;
      // in ms
      var ACTIVE_SELECTOR = 'pdfPresentationMode';
      var CONTROLS_SELECTOR = 'pdfPresentationModeControls';
      /**
       * @typedef {Object} PDFPresentationModeOptions
       * @property {HTMLDivElement} container - The container for the viewer element.
       * @property {HTMLDivElement} viewer - (optional) The viewer element.
       * @property {PDFViewer} pdfViewer - The document viewer.
       * @property {EventBus} eventBus - The application event bus.
       * @property {Array} contextMenuItems - (optional) The menuitems that are added
       *   to the context menu in Presentation Mode.
       */
      /**
       * @class
       */
      var PDFPresentationMode = function PDFPresentationModeClosure() {
        /**
         * @constructs PDFPresentationMode
         * @param {PDFPresentationModeOptions} options
         */
        function PDFPresentationMode(options) {
          this.container = options.container;
          this.viewer = options.viewer || options.container.firstElementChild;
          this.pdfViewer = options.pdfViewer;
          this.eventBus = options.eventBus;
          var contextMenuItems = options.contextMenuItems || null;
          this.active = false;
          this.args = null;
          this.contextMenuOpen = false;
          this.mouseScrollTimeStamp = 0;
          this.mouseScrollDelta = 0;
          this.touchSwipeState = null;
          if (contextMenuItems) {
            contextMenuItems.contextFirstPage.addEventListener('click', function PDFPresentationMode_contextFirstPageClick(e) {
              this.contextMenuOpen = false;
              this.eventBus.dispatch('firstpage');
            }.bind(this));
            contextMenuItems.contextLastPage.addEventListener('click', function PDFPresentationMode_contextLastPageClick(e) {
              this.contextMenuOpen = false;
              this.eventBus.dispatch('lastpage');
            }.bind(this));
            contextMenuItems.contextPageRotateCw.addEventListener('click', function PDFPresentationMode_contextPageRotateCwClick(e) {
              this.contextMenuOpen = false;
              this.eventBus.dispatch('rotatecw');
            }.bind(this));
            contextMenuItems.contextPageRotateCcw.addEventListener('click', function PDFPresentationMode_contextPageRotateCcwClick(e) {
              this.contextMenuOpen = false;
              this.eventBus.dispatch('rotateccw');
            }.bind(this));
          }
        }
        PDFPresentationMode.prototype = {
          /**
           * Request the browser to enter fullscreen mode.
           * @returns {boolean} Indicating if the request was successful.
           */
          request: function PDFPresentationMode_request() {
            if (this.switchInProgress || this.active || !this.viewer.hasChildNodes()) {
              return false;
            }
            this._addFullscreenChangeListeners();
            this._setSwitchInProgress();
            this._notifyStateChange();
            if (this.container.requestFullscreen) {
              this.container.requestFullscreen();
            } else if (this.container.mozRequestFullScreen) {
              this.container.mozRequestFullScreen();
            } else if (this.container.webkitRequestFullscreen) {
              this.container.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
            } else if (this.container.msRequestFullscreen) {
              this.container.msRequestFullscreen();
            } else {
              return false;
            }
            this.args = {
              page: this.pdfViewer.currentPageNumber,
              previousScale: this.pdfViewer.currentScaleValue
            };
            return true;
          },
          /**
           * @private
           */
          _mouseWheel: function PDFPresentationMode_mouseWheel(evt) {
            if (!this.active) {
              return;
            }
            evt.preventDefault();
            var delta = normalizeWheelEventDelta(evt);
            var MOUSE_SCROLL_COOLDOWN_TIME = 50;
            var PAGE_SWITCH_THRESHOLD = 0.1;
            var currentTime = new Date().getTime();
            var storedTime = this.mouseScrollTimeStamp;
            // If we've already switched page, avoid accidentally switching again.
            if (currentTime > storedTime && currentTime - storedTime < MOUSE_SCROLL_COOLDOWN_TIME) {
              return;
            }
            // If the scroll direction changed, reset the accumulated scroll delta.
            if (this.mouseScrollDelta > 0 && delta < 0 || this.mouseScrollDelta < 0 && delta > 0) {
              this._resetMouseScrollState();
            }
            this.mouseScrollDelta += delta;
            if (Math.abs(this.mouseScrollDelta) >= PAGE_SWITCH_THRESHOLD) {
              var totalDelta = this.mouseScrollDelta;
              this._resetMouseScrollState();
              var success = totalDelta > 0 ? this._goToPreviousPage() : this._goToNextPage();
              if (success) {
                this.mouseScrollTimeStamp = currentTime;
              }
            }
          },
          get isFullscreen() {
            return !!(document.fullscreenElement || document.mozFullScreen || document.webkitIsFullScreen || document.msFullscreenElement);
          },
          /**
           * @private
           */
          _goToPreviousPage: function PDFPresentationMode_goToPreviousPage() {
            var page = this.pdfViewer.currentPageNumber;
            // If we're at the first page, we don't need to do anything.
            if (page <= 1) {
              return false;
            }
            this.pdfViewer.currentPageNumber = page - 1;
            return true;
          },
          /**
           * @private
           */
          _goToNextPage: function PDFPresentationMode_goToNextPage() {
            var page = this.pdfViewer.currentPageNumber;
            // If we're at the last page, we don't need to do anything.
            if (page >= this.pdfViewer.pagesCount) {
              return false;
            }
            this.pdfViewer.currentPageNumber = page + 1;
            return true;
          },
          /**
           * @private
           */
          _notifyStateChange: function PDFPresentationMode_notifyStateChange() {
            this.eventBus.dispatch('presentationmodechanged', {
              source: this,
              active: this.active,
              switchInProgress: !!this.switchInProgress
            });
          },
          /**
           * Used to initialize a timeout when requesting Presentation Mode,
           * i.e. when the browser is requested to enter fullscreen mode.
           * This timeout is used to prevent the current page from being scrolled
           * partially, or completely, out of view when entering Presentation Mode.
           * NOTE: This issue seems limited to certain zoom levels (e.g. page-width).
           * @private
           */
          _setSwitchInProgress: function PDFPresentationMode_setSwitchInProgress() {
            if (this.switchInProgress) {
              clearTimeout(this.switchInProgress);
            }
            this.switchInProgress = setTimeout(function switchInProgressTimeout() {
              this._removeFullscreenChangeListeners();
              delete this.switchInProgress;
              this._notifyStateChange();
            }.bind(this), DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS);
          },
          /**
           * @private
           */
          _resetSwitchInProgress: function PDFPresentationMode_resetSwitchInProgress() {
            if (this.switchInProgress) {
              clearTimeout(this.switchInProgress);
              delete this.switchInProgress;
            }
          },
          /**
           * @private
           */
          _enter: function PDFPresentationMode_enter() {
            this.active = true;
            this._resetSwitchInProgress();
            this._notifyStateChange();
            this.container.classList.add(ACTIVE_SELECTOR);
            // Ensure that the correct page is scrolled into view when entering
            // Presentation Mode, by waiting until fullscreen mode in enabled.
            setTimeout(function enterPresentationModeTimeout() {
              this.pdfViewer.currentPageNumber = this.args.page;
              this.pdfViewer.currentScaleValue = 'page-fit';
            }.bind(this), 0);
            this._addWindowListeners();
            this._showControls();
            this.contextMenuOpen = false;
            this.container.setAttribute('contextmenu', 'viewerContextMenu');
            // Text selection is disabled in Presentation Mode, thus it's not possible
            // for the user to deselect text that is selected (e.g. with "Select all")
            // when entering Presentation Mode, hence we remove any active selection.
            window.getSelection().removeAllRanges();
          },
          /**
           * @private
           */
          _exit: function PDFPresentationMode_exit() {
            var page = this.pdfViewer.currentPageNumber;
            this.container.classList.remove(ACTIVE_SELECTOR);
            // Ensure that the correct page is scrolled into view when exiting
            // Presentation Mode, by waiting until fullscreen mode is disabled.
            setTimeout(function exitPresentationModeTimeout() {
              this.active = false;
              this._removeFullscreenChangeListeners();
              this._notifyStateChange();
              this.pdfViewer.currentScaleValue = this.args.previousScale;
              this.pdfViewer.currentPageNumber = page;
              this.args = null;
            }.bind(this), 0);
            this._removeWindowListeners();
            this._hideControls();
            this._resetMouseScrollState();
            this.container.removeAttribute('contextmenu');
            this.contextMenuOpen = false;
          },
          /**
           * @private
           */
          _mouseDown: function PDFPresentationMode_mouseDown(evt) {
            if (this.contextMenuOpen) {
              this.contextMenuOpen = false;
              evt.preventDefault();
              return;
            }
            if (evt.button === 0) {
              // Enable clicking of links in presentation mode. Please note:
              // Only links pointing to destinations in the current PDF document work.
              var isInternalLink = evt.target.href && evt.target.classList.contains('internalLink');
              if (!isInternalLink) {
                // Unless an internal link was clicked, advance one page.
                evt.preventDefault();
                this.pdfViewer.currentPageNumber += evt.shiftKey ? -1 : 1;
              }
            }
          },
          /**
           * @private
           */
          _contextMenu: function PDFPresentationMode_contextMenu() {
            this.contextMenuOpen = true;
          },
          /**
           * @private
           */
          _showControls: function PDFPresentationMode_showControls() {
            if (this.controlsTimeout) {
              clearTimeout(this.controlsTimeout);
            } else {
              this.container.classList.add(CONTROLS_SELECTOR);
            }
            this.controlsTimeout = setTimeout(function showControlsTimeout() {
              this.container.classList.remove(CONTROLS_SELECTOR);
              delete this.controlsTimeout;
            }.bind(this), DELAY_BEFORE_HIDING_CONTROLS);
          },
          /**
           * @private
           */
          _hideControls: function PDFPresentationMode_hideControls() {
            if (!this.controlsTimeout) {
              return;
            }
            clearTimeout(this.controlsTimeout);
            this.container.classList.remove(CONTROLS_SELECTOR);
            delete this.controlsTimeout;
          },
          /**
           * Resets the properties used for tracking mouse scrolling events.
           * @private
           */
          _resetMouseScrollState: function PDFPresentationMode_resetMouseScrollState() {
            this.mouseScrollTimeStamp = 0;
            this.mouseScrollDelta = 0;
          },
          /**
           * @private
           */
          _touchSwipe: function PDFPresentationMode_touchSwipe(evt) {
            if (!this.active) {
              return;
            }
            // Must move at least these many CSS pixels for it to count as a swipe
            var SWIPE_MIN_DISTANCE_THRESHOLD = 50;
            // The swipe angle is allowed to deviate from the x or y axis by this much
            // before it is not considered a swipe in that direction any more.
            var SWIPE_ANGLE_THRESHOLD = Math.PI / 6;
            if (evt.touches.length > 1) {
              // Multiple touch points detected, cancel the swipe.
              this.touchSwipeState = null;
              return;
            }
            switch (evt.type) {
            case 'touchstart':
              this.touchSwipeState = {
                startX: evt.touches[0].pageX,
                startY: evt.touches[0].pageY,
                endX: evt.touches[0].pageX,
                endY: evt.touches[0].pageY
              };
              break;
            case 'touchmove':
              if (this.touchSwipeState === null) {
                return;
              }
              this.touchSwipeState.endX = evt.touches[0].pageX;
              this.touchSwipeState.endY = evt.touches[0].pageY;
              // Do a preventDefault to avoid the swipe from triggering browser
              // gestures (Chrome in particular has some sort of swipe gesture in
              // fullscreen mode).
              evt.preventDefault();
              break;
            case 'touchend':
              if (this.touchSwipeState === null) {
                return;
              }
              var delta = 0;
              var dx = this.touchSwipeState.endX - this.touchSwipeState.startX;
              var dy = this.touchSwipeState.endY - this.touchSwipeState.startY;
              var absAngle = Math.abs(Math.atan2(dy, dx));
              if (Math.abs(dx) > SWIPE_MIN_DISTANCE_THRESHOLD && (absAngle <= SWIPE_ANGLE_THRESHOLD || absAngle >= Math.PI - SWIPE_ANGLE_THRESHOLD)) {
                // horizontal swipe
                delta = dx;
              } else if (Math.abs(dy) > SWIPE_MIN_DISTANCE_THRESHOLD && Math.abs(absAngle - Math.PI / 2) <= SWIPE_ANGLE_THRESHOLD) {
                // vertical swipe
                delta = dy;
              }
              if (delta > 0) {
                this._goToPreviousPage();
              } else if (delta < 0) {
                this._goToNextPage();
              }
              break;
            }
          },
          /**
           * @private
           */
          _addWindowListeners: function PDFPresentationMode_addWindowListeners() {
            this.showControlsBind = this._showControls.bind(this);
            this.mouseDownBind = this._mouseDown.bind(this);
            this.mouseWheelBind = this._mouseWheel.bind(this);
            this.resetMouseScrollStateBind = this._resetMouseScrollState.bind(this);
            this.contextMenuBind = this._contextMenu.bind(this);
            this.touchSwipeBind = this._touchSwipe.bind(this);
            window.addEventListener('mousemove', this.showControlsBind);
            window.addEventListener('mousedown', this.mouseDownBind);
            window.addEventListener('wheel', this.mouseWheelBind);
            window.addEventListener('keydown', this.resetMouseScrollStateBind);
            window.addEventListener('contextmenu', this.contextMenuBind);
            window.addEventListener('touchstart', this.touchSwipeBind);
            window.addEventListener('touchmove', this.touchSwipeBind);
            window.addEventListener('touchend', this.touchSwipeBind);
          },
          /**
           * @private
           */
          _removeWindowListeners: function PDFPresentationMode_removeWindowListeners() {
            window.removeEventListener('mousemove', this.showControlsBind);
            window.removeEventListener('mousedown', this.mouseDownBind);
            window.removeEventListener('wheel', this.mouseWheelBind);
            window.removeEventListener('keydown', this.resetMouseScrollStateBind);
            window.removeEventListener('contextmenu', this.contextMenuBind);
            window.removeEventListener('touchstart', this.touchSwipeBind);
            window.removeEventListener('touchmove', this.touchSwipeBind);
            window.removeEventListener('touchend', this.touchSwipeBind);
            delete this.showControlsBind;
            delete this.mouseDownBind;
            delete this.mouseWheelBind;
            delete this.resetMouseScrollStateBind;
            delete this.contextMenuBind;
            delete this.touchSwipeBind;
          },
          /**
           * @private
           */
          _fullscreenChange: function PDFPresentationMode_fullscreenChange() {
            if (this.isFullscreen) {
              this._enter();
            } else {
              this._exit();
            }
          },
          /**
           * @private
           */
          _addFullscreenChangeListeners: function PDFPresentationMode_addFullscreenChangeListeners() {
            this.fullscreenChangeBind = this._fullscreenChange.bind(this);
            window.addEventListener('fullscreenchange', this.fullscreenChangeBind);
            window.addEventListener('mozfullscreenchange', this.fullscreenChangeBind);
          },
          /**
           * @private
           */
          _removeFullscreenChangeListeners: function PDFPresentationMode_removeFullscreenChangeListeners() {
            window.removeEventListener('fullscreenchange', this.fullscreenChangeBind);
            window.removeEventListener('mozfullscreenchange', this.fullscreenChangeBind);
            delete this.fullscreenChangeBind;
          }
        };
        return PDFPresentationMode;
      }();
      exports.PDFPresentationMode = PDFPresentationMode;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFThumbnailView = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFRenderingQueue);
    }(this, function (exports, uiUtils, pdfRenderingQueue) {
      var mozL10n = uiUtils.mozL10n;
      var getOutputScale = uiUtils.getOutputScale;
      var RenderingStates = pdfRenderingQueue.RenderingStates;
      var THUMBNAIL_WIDTH = 98;
      // px
      var THUMBNAIL_CANVAS_BORDER_WIDTH = 1;
      // px
      /**
       * @typedef {Object} PDFThumbnailViewOptions
       * @property {HTMLDivElement} container - The viewer element.
       * @property {number} id - The thumbnail's unique ID (normally its number).
       * @property {PageViewport} defaultViewport - The page viewport.
       * @property {IPDFLinkService} linkService - The navigation/linking service.
       * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
       * @property {boolean} disableCanvasToImageConversion - (optional) Don't convert
       *   the canvas thumbnails to images. This prevents `toDataURL` calls,
       *   but increases the overall memory usage. The default value is false.
       */
      /**
       * @class
       * @implements {IRenderableView}
       */
      var PDFThumbnailView = function PDFThumbnailViewClosure() {
        function getTempCanvas(width, height) {
          var tempCanvas = PDFThumbnailView.tempImageCache;
          if (!tempCanvas) {
            tempCanvas = document.createElement('canvas');
            PDFThumbnailView.tempImageCache = tempCanvas;
          }
          tempCanvas.width = width;
          tempCanvas.height = height;
          tempCanvas.mozOpaque = true;
          var ctx = tempCanvas.getContext('2d', { alpha: false });
          ctx.save();
          ctx.fillStyle = 'rgb(255, 255, 255)';
          ctx.fillRect(0, 0, width, height);
          ctx.restore();
          return tempCanvas;
        }
        /**
         * @constructs PDFThumbnailView
         * @param {PDFThumbnailViewOptions} options
         */
        function PDFThumbnailView(options) {
          var container = options.container;
          var id = options.id;
          var defaultViewport = options.defaultViewport;
          var linkService = options.linkService;
          var renderingQueue = options.renderingQueue;
          var disableCanvasToImageConversion = options.disableCanvasToImageConversion || false;
          this.id = id;
          this.renderingId = 'thumbnail' + id;
          this.pageLabel = null;
          this.pdfPage = null;
          this.rotation = 0;
          this.viewport = defaultViewport;
          this.pdfPageRotate = defaultViewport.rotation;
          this.linkService = linkService;
          this.renderingQueue = renderingQueue;
          this.renderTask = null;
          this.renderingState = RenderingStates.INITIAL;
          this.resume = null;
          this.disableCanvasToImageConversion = disableCanvasToImageConversion;
          this.pageWidth = this.viewport.width;
          this.pageHeight = this.viewport.height;
          this.pageRatio = this.pageWidth / this.pageHeight;
          this.canvasWidth = THUMBNAIL_WIDTH;
          this.canvasHeight = this.canvasWidth / this.pageRatio | 0;
          this.scale = this.canvasWidth / this.pageWidth;
          var anchor = document.createElement('a');
          anchor.href = linkService.getAnchorUrl('#page=' + id);
          anchor.title = mozL10n.get('thumb_page_title', { page: id }, 'Page {{page}}');
          anchor.onclick = function stopNavigation() {
            linkService.page = id;
            return false;
          };
          this.anchor = anchor;
          var div = document.createElement('div');
          div.id = 'thumbnailContainer' + id;
          div.className = 'thumbnail';
          this.div = div;
          if (id === 1) {
            // Highlight the thumbnail of the first page when no page number is
            // specified (or exists in cache) when the document is loaded.
            div.classList.add('selected');
          }
          var ring = document.createElement('div');
          ring.className = 'thumbnailSelectionRing';
          var borderAdjustment = 2 * THUMBNAIL_CANVAS_BORDER_WIDTH;
          ring.style.width = this.canvasWidth + borderAdjustment + 'px';
          ring.style.height = this.canvasHeight + borderAdjustment + 'px';
          this.ring = ring;
          div.appendChild(ring);
          anchor.appendChild(div);
          container.appendChild(anchor);
        }
        PDFThumbnailView.prototype = {
          setPdfPage: function PDFThumbnailView_setPdfPage(pdfPage) {
            this.pdfPage = pdfPage;
            this.pdfPageRotate = pdfPage.rotate;
            var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
            this.viewport = pdfPage.getViewport(1, totalRotation);
            this.reset();
          },
          reset: function PDFThumbnailView_reset() {
            this.cancelRendering();
            this.pageWidth = this.viewport.width;
            this.pageHeight = this.viewport.height;
            this.pageRatio = this.pageWidth / this.pageHeight;
            this.canvasHeight = this.canvasWidth / this.pageRatio | 0;
            this.scale = this.canvasWidth / this.pageWidth;
            this.div.removeAttribute('data-loaded');
            var ring = this.ring;
            var childNodes = ring.childNodes;
            for (var i = childNodes.length - 1; i >= 0; i--) {
              ring.removeChild(childNodes[i]);
            }
            var borderAdjustment = 2 * THUMBNAIL_CANVAS_BORDER_WIDTH;
            ring.style.width = this.canvasWidth + borderAdjustment + 'px';
            ring.style.height = this.canvasHeight + borderAdjustment + 'px';
            if (this.canvas) {
              // Zeroing the width and height causes Firefox to release graphics
              // resources immediately, which can greatly reduce memory consumption.
              this.canvas.width = 0;
              this.canvas.height = 0;
              delete this.canvas;
            }
            if (this.image) {
              this.image.removeAttribute('src');
              delete this.image;
            }
          },
          update: function PDFThumbnailView_update(rotation) {
            if (typeof rotation !== 'undefined') {
              this.rotation = rotation;
            }
            var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
            this.viewport = this.viewport.clone({
              scale: 1,
              rotation: totalRotation
            });
            this.reset();
          },
          cancelRendering: function PDFThumbnailView_cancelRendering() {
            if (this.renderTask) {
              this.renderTask.cancel();
              this.renderTask = null;
            }
            this.renderingState = RenderingStates.INITIAL;
            this.resume = null;
          },
          /**
           * @private
           */
          _getPageDrawContext: function PDFThumbnailView_getPageDrawContext(noCtxScale) {
            var canvas = document.createElement('canvas');
            // Keep the no-thumbnail outline visible, i.e. `data-loaded === false`,
            // until rendering/image conversion is complete, to avoid display issues.
            this.canvas = canvas;
            canvas.mozOpaque = true;
            var ctx = canvas.getContext('2d', { alpha: false });
            var outputScale = getOutputScale(ctx);
            canvas.width = this.canvasWidth * outputScale.sx | 0;
            canvas.height = this.canvasHeight * outputScale.sy | 0;
            canvas.style.width = this.canvasWidth + 'px';
            canvas.style.height = this.canvasHeight + 'px';
            if (!noCtxScale && outputScale.scaled) {
              ctx.scale(outputScale.sx, outputScale.sy);
            }
            return ctx;
          },
          /**
           * @private
           */
          _convertCanvasToImage: function PDFThumbnailView_convertCanvasToImage() {
            if (!this.canvas) {
              return;
            }
            if (this.renderingState !== RenderingStates.FINISHED) {
              return;
            }
            var id = this.renderingId;
            var className = 'thumbnailImage';
            var ariaLabel = mozL10n.get('thumb_page_canvas', { page: this.pageId }, 'Thumbnail of Page {{page}}');
            if (this.disableCanvasToImageConversion) {
              this.canvas.id = id;
              this.canvas.className = className;
              this.canvas.setAttribute('aria-label', ariaLabel);
              this.div.setAttribute('data-loaded', true);
              this.ring.appendChild(this.canvas);
              return;
            }
            var image = document.createElement('img');
            image.id = id;
            image.className = className;
            image.setAttribute('aria-label', ariaLabel);
            image.style.width = this.canvasWidth + 'px';
            image.style.height = this.canvasHeight + 'px';
            image.src = this.canvas.toDataURL();
            this.image = image;
            this.div.setAttribute('data-loaded', true);
            this.ring.appendChild(image);
            // Zeroing the width and height causes Firefox to release graphics
            // resources immediately, which can greatly reduce memory consumption.
            this.canvas.width = 0;
            this.canvas.height = 0;
            delete this.canvas;
          },
          draw: function PDFThumbnailView_draw() {
            if (this.renderingState !== RenderingStates.INITIAL) {
              console.error('Must be in new state before drawing');
              return Promise.resolve(undefined);
            }
            this.renderingState = RenderingStates.RUNNING;
            var resolveRenderPromise, rejectRenderPromise;
            var promise = new Promise(function (resolve, reject) {
              resolveRenderPromise = resolve;
              rejectRenderPromise = reject;
            });
            var self = this;
            function thumbnailDrawCallback(error) {
              // The renderTask may have been replaced by a new one, so only remove
              // the reference to the renderTask if it matches the one that is
              // triggering this callback.
              if (renderTask === self.renderTask) {
                self.renderTask = null;
              }
              if (error === 'cancelled') {
                rejectRenderPromise(error);
                return;
              }
              self.renderingState = RenderingStates.FINISHED;
              self._convertCanvasToImage();
              if (!error) {
                resolveRenderPromise(undefined);
              } else {
                rejectRenderPromise(error);
              }
            }
            var ctx = this._getPageDrawContext();
            var drawViewport = this.viewport.clone({ scale: this.scale });
            var renderContinueCallback = function renderContinueCallback(cont) {
              if (!self.renderingQueue.isHighestPriority(self)) {
                self.renderingState = RenderingStates.PAUSED;
                self.resume = function resumeCallback() {
                  self.renderingState = RenderingStates.RUNNING;
                  cont();
                };
                return;
              }
              cont();
            };
            var renderContext = {
              canvasContext: ctx,
              viewport: drawViewport
            };
            var renderTask = this.renderTask = this.pdfPage.render(renderContext);
            renderTask.onContinue = renderContinueCallback;
            renderTask.promise.then(function pdfPageRenderCallback() {
              thumbnailDrawCallback(null);
            }, function pdfPageRenderError(error) {
              thumbnailDrawCallback(error);
            });
            return promise;
          },
          setImage: function PDFThumbnailView_setImage(pageView) {
            if (this.renderingState !== RenderingStates.INITIAL) {
              return;
            }
            var img = pageView.canvas;
            if (!img) {
              return;
            }
            if (!this.pdfPage) {
              this.setPdfPage(pageView.pdfPage);
            }
            this.renderingState = RenderingStates.FINISHED;
            var ctx = this._getPageDrawContext(true);
            var canvas = ctx.canvas;
            if (img.width <= 2 * canvas.width) {
              ctx.drawImage(img, 0, 0, img.width, img.height, 0, 0, canvas.width, canvas.height);
              this._convertCanvasToImage();
              return;
            }
            // drawImage does an awful job of rescaling the image, doing it gradually.
            var MAX_NUM_SCALING_STEPS = 3;
            var reducedWidth = canvas.width << MAX_NUM_SCALING_STEPS;
            var reducedHeight = canvas.height << MAX_NUM_SCALING_STEPS;
            var reducedImage = getTempCanvas(reducedWidth, reducedHeight);
            var reducedImageCtx = reducedImage.getContext('2d');
            while (reducedWidth > img.width || reducedHeight > img.height) {
              reducedWidth >>= 1;
              reducedHeight >>= 1;
            }
            reducedImageCtx.drawImage(img, 0, 0, img.width, img.height, 0, 0, reducedWidth, reducedHeight);
            while (reducedWidth > 2 * canvas.width) {
              reducedImageCtx.drawImage(reducedImage, 0, 0, reducedWidth, reducedHeight, 0, 0, reducedWidth >> 1, reducedHeight >> 1);
              reducedWidth >>= 1;
              reducedHeight >>= 1;
            }
            ctx.drawImage(reducedImage, 0, 0, reducedWidth, reducedHeight, 0, 0, canvas.width, canvas.height);
            this._convertCanvasToImage();
          },
          get pageId() {
            return this.pageLabel !== null ? this.pageLabel : this.id;
          },
          /**
           * @param {string|null} label
           */
          setPageLabel: function PDFThumbnailView_setPageLabel(label) {
            this.pageLabel = typeof label === 'string' ? label : null;
            this.anchor.title = mozL10n.get('thumb_page_title', { page: this.pageId }, 'Page {{page}}');
            if (this.renderingState !== RenderingStates.FINISHED) {
              return;
            }
            var ariaLabel = mozL10n.get('thumb_page_canvas', { page: this.pageId }, 'Thumbnail of Page {{page}}');
            if (this.image) {
              this.image.setAttribute('aria-label', ariaLabel);
            } else if (this.disableCanvasToImageConversion && this.canvas) {
              this.canvas.setAttribute('aria-label', ariaLabel);
            }
          }
        };
        return PDFThumbnailView;
      }();
      PDFThumbnailView.tempImageCache = null;
      exports.PDFThumbnailView = PDFThumbnailView;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebSecondaryToolbar = {}, root.pdfjsWebUIUtils);
    }(this, function (exports, uiUtils) {
      var SCROLLBAR_PADDING = uiUtils.SCROLLBAR_PADDING;
      var mozL10n = uiUtils.mozL10n;
      /**
       * @typedef {Object} SecondaryToolbarOptions
       * @property {HTMLDivElement} toolbar - Container for the secondary toolbar.
       * @property {HTMLButtonElement} toggleButton - Button to toggle the visibility
       *   of the secondary toolbar.
       * @property {HTMLDivElement} toolbarButtonContainer - Container where all the
       *   toolbar buttons are placed. The maximum height of the toolbar is controlled
       *   dynamically by adjusting the 'max-height' CSS property of this DOM element.
       * @property {HTMLButtonElement} presentationModeButton - Button for entering
       *   presentation mode.
       * @property {HTMLButtonElement} openFileButton - Button to open a file.
       * @property {HTMLButtonElement} printButton - Button to print the document.
       * @property {HTMLButtonElement} downloadButton - Button to download the
       *   document.
       * @property {HTMLLinkElement} viewBookmarkButton - Button to obtain a bookmark
       *   link to the current location in the document.
       * @property {HTMLButtonElement} firstPageButton - Button to go to the first
       *   page in the document.
       * @property {HTMLButtonElement} lastPageButton - Button to go to the last page
       *   in the document.
       * @property {HTMLButtonElement} pageRotateCwButton - Button to rotate the pages
       *   clockwise.
       * @property {HTMLButtonElement} pageRotateCcwButton - Button to rotate the
       *   pages counterclockwise.
       * @property {HTMLButtonElement} toggleHandToolButton - Button to toggle the
       *   hand tool.
       * @property {HTMLButtonElement} documentPropertiesButton - Button for opening
       *   the document properties dialog.
       */
      /**
       * @class
       */
      var SecondaryToolbar = function SecondaryToolbarClosure() {
        /**
         * @constructs SecondaryToolbar
         * @param {SecondaryToolbarOptions} options
         * @param {HTMLDivElement} mainContainer
         * @param {EventBus} eventBus
         */
        function SecondaryToolbar(options, mainContainer, eventBus) {
          this.toolbar = options.toolbar;
          this.toggleButton = options.toggleButton;
          this.toolbarButtonContainer = options.toolbarButtonContainer;
          this.buttons = [
            {
              element: options.presentationModeButton,
              eventName: 'presentationmode',
              close: true
            },
            {
              element: options.openFileButton,
              eventName: 'openfile',
              close: true
            },
            {
              element: options.printButton,
              eventName: 'print',
              close: true
            },
            {
              element: options.downloadButton,
              eventName: 'download',
              close: true
            },
            {
              element: options.viewBookmarkButton,
              eventName: null,
              close: true
            },
            {
              element: options.firstPageButton,
              eventName: 'firstpage',
              close: true
            },
            {
              element: options.lastPageButton,
              eventName: 'lastpage',
              close: true
            },
            {
              element: options.pageRotateCwButton,
              eventName: 'rotatecw',
              close: false
            },
            {
              element: options.pageRotateCcwButton,
              eventName: 'rotateccw',
              close: false
            },
            {
              element: options.toggleHandToolButton,
              eventName: 'togglehandtool',
              close: true
            },
            {
              element: options.documentPropertiesButton,
              eventName: 'documentproperties',
              close: true
            }
          ];
          this.mainContainer = mainContainer;
          this.eventBus = eventBus;
          this.opened = false;
          this.containerHeight = null;
          this.previousContainerHeight = null;
          // Bind the event listeners for click and hand tool actions.
          this._bindClickListeners();
          this._bindHandToolListener(options.toggleHandToolButton);
          // Bind the event listener for adjusting the 'max-height' of the toolbar.
          this.eventBus.on('resize', this._setMaxHeight.bind(this));
        }
        SecondaryToolbar.prototype = {
          /**
           * @return {boolean}
           */
          get isOpen() {
            return this.opened;
          },
          _bindClickListeners: function SecondaryToolbar_bindClickListeners() {
            // Button to toggle the visibility of the secondary toolbar.
            this.toggleButton.addEventListener('click', this.toggle.bind(this));
            // All items within the secondary toolbar.
            for (var button in this.buttons) {
              var element = this.buttons[button].element;
              var eventName = this.buttons[button].eventName;
              var close = this.buttons[button].close;
              element.addEventListener('click', function (eventName, close) {
                if (eventName !== null) {
                  this.eventBus.dispatch(eventName, { source: this });
                }
                if (close) {
                  this.close();
                }
              }.bind(this, eventName, close));
            }
          },
          _bindHandToolListener: function SecondaryToolbar_bindHandToolListener(toggleHandToolButton) {
            var isHandToolActive = false;
            this.eventBus.on('handtoolchanged', function (e) {
              if (isHandToolActive === e.isActive) {
                return;
              }
              isHandToolActive = e.isActive;
              if (isHandToolActive) {
                toggleHandToolButton.title = mozL10n.get('hand_tool_disable.title', null, 'Disable hand tool');
                toggleHandToolButton.firstElementChild.textContent = mozL10n.get('hand_tool_disable_label', null, 'Disable hand tool');
              } else {
                toggleHandToolButton.title = mozL10n.get('hand_tool_enable.title', null, 'Enable hand tool');
                toggleHandToolButton.firstElementChild.textContent = mozL10n.get('hand_tool_enable_label', null, 'Enable hand tool');
              }
            }.bind(this));
          },
          open: function SecondaryToolbar_open() {
            if (this.opened) {
              return;
            }
            this.opened = true;
            this._setMaxHeight();
            this.toggleButton.classList.add('toggled');
            this.toolbar.classList.remove('hidden');
          },
          close: function SecondaryToolbar_close() {
            if (!this.opened) {
              return;
            }
            this.opened = false;
            this.toolbar.classList.add('hidden');
            this.toggleButton.classList.remove('toggled');
          },
          toggle: function SecondaryToolbar_toggle() {
            if (this.opened) {
              this.close();
            } else {
              this.open();
            }
          },
          /**
           * @private
           */
          _setMaxHeight: function SecondaryToolbar_setMaxHeight() {
            if (!this.opened) {
              return;
            }
            // Only adjust the 'max-height' if the toolbar is visible.
            this.containerHeight = this.mainContainer.clientHeight;
            if (this.containerHeight === this.previousContainerHeight) {
              return;
            }
            this.toolbarButtonContainer.setAttribute('style', 'max-height: ' + (this.containerHeight - SCROLLBAR_PADDING) + 'px;');
            this.previousContainerHeight = this.containerHeight;
          }
        };
        return SecondaryToolbar;
      }();
      exports.SecondaryToolbar = SecondaryToolbar;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFFindBar = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFFindController);
    }(this, function (exports, uiUtils, pdfFindController) {
      var mozL10n = uiUtils.mozL10n;
      var FindStates = pdfFindController.FindStates;
      /**
       * Creates a "search bar" given a set of DOM elements that act as controls
       * for searching or for setting search preferences in the UI. This object
       * also sets up the appropriate events for the controls. Actual searching
       * is done by PDFFindController.
       */
      var PDFFindBar = function PDFFindBarClosure() {
        function PDFFindBar(options) {
          this.opened = false;
          this.bar = options.bar || null;
          this.toggleButton = options.toggleButton || null;
          this.findField = options.findField || null;
          this.highlightAll = options.highlightAllCheckbox || null;
          this.caseSensitive = options.caseSensitiveCheckbox || null;
          this.findMsg = options.findMsg || null;
          this.findResultsCount = options.findResultsCount || null;
          this.findStatusIcon = options.findStatusIcon || null;
          this.findPreviousButton = options.findPreviousButton || null;
          this.findNextButton = options.findNextButton || null;
          this.findController = options.findController || null;
          this.eventBus = options.eventBus;
          if (this.findController === null) {
            throw new Error('PDFFindBar cannot be used without a ' + 'PDFFindController instance.');
          }
          // Add event listeners to the DOM elements.
          var self = this;
          this.toggleButton.addEventListener('click', function () {
            self.toggle();
          });
          this.findField.addEventListener('input', function () {
            self.dispatchEvent('');
          });
          this.bar.addEventListener('keydown', function (evt) {
            switch (evt.keyCode) {
            case 13:
              // Enter
              if (evt.target === self.findField) {
                self.dispatchEvent('again', evt.shiftKey);
              }
              break;
            case 27:
              // Escape
              self.close();
              break;
            }
          });
          this.findPreviousButton.addEventListener('click', function () {
            self.dispatchEvent('again', true);
          });
          this.findNextButton.addEventListener('click', function () {
            self.dispatchEvent('again', false);
          });
          this.highlightAll.addEventListener('click', function () {
            self.dispatchEvent('highlightallchange');
          });
          this.caseSensitive.addEventListener('click', function () {
            self.dispatchEvent('casesensitivitychange');
          });
        }
        PDFFindBar.prototype = {
          reset: function PDFFindBar_reset() {
            this.updateUIState();
          },
          dispatchEvent: function PDFFindBar_dispatchEvent(type, findPrev) {
            this.eventBus.dispatch('find', {
              source: this,
              type: type,
              query: this.findField.value,
              caseSensitive: this.caseSensitive.checked,
              phraseSearch: true,
              highlightAll: this.highlightAll.checked,
              findPrevious: findPrev
            });
          },
          updateUIState: function PDFFindBar_updateUIState(state, previous, matchCount) {
            var notFound = false;
            var findMsg = '';
            var status = '';
            switch (state) {
            case FindStates.FIND_FOUND:
              break;
            case FindStates.FIND_PENDING:
              status = 'pending';
              break;
            case FindStates.FIND_NOTFOUND:
              findMsg = mozL10n.get('find_not_found', null, 'Phrase not found');
              notFound = true;
              break;
            case FindStates.FIND_WRAPPED:
              if (previous) {
                findMsg = mozL10n.get('find_reached_top', null, 'Reached top of document, continued from bottom');
              } else {
                findMsg = mozL10n.get('find_reached_bottom', null, 'Reached end of document, continued from top');
              }
              break;
            }
            if (notFound) {
              this.findField.classList.add('notFound');
            } else {
              this.findField.classList.remove('notFound');
            }
            this.findField.setAttribute('data-status', status);
            this.findMsg.textContent = findMsg;
            this.updateResultsCount(matchCount);
          },
          updateResultsCount: function (matchCount) {
            if (!this.findResultsCount) {
              return;
            }
            // no UI control is provided
            // If there are no matches, hide the counter
            if (!matchCount) {
              this.findResultsCount.classList.add('hidden');
              return;
            }
            // Create the match counter
            this.findResultsCount.textContent = matchCount.toLocaleString();
            // Show the counter
            this.findResultsCount.classList.remove('hidden');
          },
          open: function PDFFindBar_open() {
            if (!this.opened) {
              this.opened = true;
              this.toggleButton.classList.add('toggled');
              this.bar.classList.remove('hidden');
            }
            this.findField.select();
            this.findField.focus();
          },
          close: function PDFFindBar_close() {
            if (!this.opened) {
              return;
            }
            this.opened = false;
            this.toggleButton.classList.remove('toggled');
            this.bar.classList.add('hidden');
            this.findController.active = false;
          },
          toggle: function PDFFindBar_toggle() {
            if (this.opened) {
              this.close();
            } else {
              this.open();
            }
          }
        };
        return PDFFindBar;
      }();
      exports.PDFFindBar = PDFFindBar;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFHistory = {}, root.pdfjsWebDOMEvents);
    }(this, function (exports, domEvents) {
      function PDFHistory(options) {
        this.linkService = options.linkService;
        this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
        this.initialized = false;
        this.initialDestination = null;
        this.initialBookmark = null;
      }
      PDFHistory.prototype = {
        /**
         * @param {string} fingerprint
         */
        initialize: function pdfHistoryInitialize(fingerprint) {
          this.initialized = true;
          this.reInitialized = false;
          this.allowHashChange = true;
          this.historyUnlocked = true;
          this.isViewerInPresentationMode = false;
          this.previousHash = window.location.hash.substring(1);
          this.currentBookmark = '';
          this.currentPage = 0;
          this.updatePreviousBookmark = false;
          this.previousBookmark = '';
          this.previousPage = 0;
          this.nextHashParam = '';
          this.fingerprint = fingerprint;
          this.currentUid = this.uid = 0;
          this.current = {};
          var state = window.history.state;
          if (this._isStateObjectDefined(state)) {
            // This corresponds to navigating back to the document
            // from another page in the browser history.
            if (state.target.dest) {
              this.initialDestination = state.target.dest;
            } else {
              this.initialBookmark = state.target.hash;
            }
            this.currentUid = state.uid;
            this.uid = state.uid + 1;
            this.current = state.target;
          } else {
            // This corresponds to the loading of a new document.
            if (state && state.fingerprint && this.fingerprint !== state.fingerprint) {
              // Reinitialize the browsing history when a new document
              // is opened in the web viewer.
              this.reInitialized = true;
            }
            this._pushOrReplaceState({ fingerprint: this.fingerprint }, true);
          }
          var self = this;
          window.addEventListener('popstate', function pdfHistoryPopstate(evt) {
            if (!self.historyUnlocked) {
              return;
            }
            if (evt.state) {
              // Move back/forward in the history.
              self._goTo(evt.state);
              return;
            }
            // If the state is not set, then the user tried to navigate to a
            // different hash by manually editing the URL and pressing Enter, or by
            // clicking on an in-page link (e.g. the "current view" link).
            // Save the current view state to the browser history.
            // Note: In Firefox, history.null could also be null after an in-page
            // navigation to the same URL, and without dispatching the popstate
            // event: https://bugzilla.mozilla.org/show_bug.cgi?id=1183881
            if (self.uid === 0) {
              // Replace the previous state if it was not explicitly set.
              var previousParams = self.previousHash && self.currentBookmark && self.previousHash !== self.currentBookmark ? {
                hash: self.currentBookmark,
                page: self.currentPage
              } : { page: 1 };
              replacePreviousHistoryState(previousParams, function () {
                updateHistoryWithCurrentHash();
              });
            } else {
              updateHistoryWithCurrentHash();
            }
          }, false);
          function updateHistoryWithCurrentHash() {
            self.previousHash = window.location.hash.slice(1);
            self._pushToHistory({ hash: self.previousHash }, false, true);
            self._updatePreviousBookmark();
          }
          function replacePreviousHistoryState(params, callback) {
            // To modify the previous history entry, the following happens:
            // 1. history.back()
            // 2. _pushToHistory, which calls history.replaceState( ... )
            // 3. history.forward()
            // Because a navigation via the history API does not immediately update
            // the history state, the popstate event is used for synchronization.
            self.historyUnlocked = false;
            // Suppress the hashchange event to avoid side effects caused by
            // navigating back and forward.
            self.allowHashChange = false;
            window.addEventListener('popstate', rewriteHistoryAfterBack);
            history.back();
            function rewriteHistoryAfterBack() {
              window.removeEventListener('popstate', rewriteHistoryAfterBack);
              window.addEventListener('popstate', rewriteHistoryAfterForward);
              self._pushToHistory(params, false, true);
              history.forward();
            }
            function rewriteHistoryAfterForward() {
              window.removeEventListener('popstate', rewriteHistoryAfterForward);
              self.allowHashChange = true;
              self.historyUnlocked = true;
              callback();
            }
          }
          function pdfHistoryBeforeUnload() {
            var previousParams = self._getPreviousParams(null, true);
            if (previousParams) {
              var replacePrevious = !self.current.dest && self.current.hash !== self.previousHash;
              self._pushToHistory(previousParams, false, replacePrevious);
              self._updatePreviousBookmark();
            }
            // Remove the event listener when navigating away from the document,
            // since 'beforeunload' prevents Firefox from caching the document.
            window.removeEventListener('beforeunload', pdfHistoryBeforeUnload, false);
          }
          window.addEventListener('beforeunload', pdfHistoryBeforeUnload, false);
          window.addEventListener('pageshow', function pdfHistoryPageShow(evt) {
            // If the entire viewer (including the PDF file) is cached in
            // the browser, we need to reattach the 'beforeunload' event listener
            // since the 'DOMContentLoaded' event is not fired on 'pageshow'.
            window.addEventListener('beforeunload', pdfHistoryBeforeUnload, false);
          }, false);
          self.eventBus.on('presentationmodechanged', function (e) {
            self.isViewerInPresentationMode = e.active;
          });
        },
        clearHistoryState: function pdfHistory_clearHistoryState() {
          this._pushOrReplaceState(null, true);
        },
        _isStateObjectDefined: function pdfHistory_isStateObjectDefined(state) {
          return state && state.uid >= 0 && state.fingerprint && this.fingerprint === state.fingerprint && state.target && state.target.hash ? true : false;
        },
        _pushOrReplaceState: function pdfHistory_pushOrReplaceState(stateObj, replace) {
          if (replace) {
            window.history.replaceState(stateObj, '');
          } else {
            window.history.pushState(stateObj, '');
          }
        },
        get isHashChangeUnlocked() {
          if (!this.initialized) {
            return true;
          }
          return this.allowHashChange;
        },
        _updatePreviousBookmark: function pdfHistory_updatePreviousBookmark() {
          if (this.updatePreviousBookmark && this.currentBookmark && this.currentPage) {
            this.previousBookmark = this.currentBookmark;
            this.previousPage = this.currentPage;
            this.updatePreviousBookmark = false;
          }
        },
        updateCurrentBookmark: function pdfHistoryUpdateCurrentBookmark(bookmark, pageNum) {
          if (this.initialized) {
            this.currentBookmark = bookmark.substring(1);
            this.currentPage = pageNum | 0;
            this._updatePreviousBookmark();
          }
        },
        updateNextHashParam: function pdfHistoryUpdateNextHashParam(param) {
          if (this.initialized) {
            this.nextHashParam = param;
          }
        },
        push: function pdfHistoryPush(params, isInitialBookmark) {
          if (!(this.initialized && this.historyUnlocked)) {
            return;
          }
          if (params.dest && !params.hash) {
            params.hash = this.current.hash && this.current.dest && this.current.dest === params.dest ? this.current.hash : this.linkService.getDestinationHash(params.dest).split('#')[1];
          }
          if (params.page) {
            params.page |= 0;
          }
          if (isInitialBookmark) {
            var target = window.history.state.target;
            if (!target) {
              // Invoked when the user specifies an initial bookmark,
              // thus setting initialBookmark, when the document is loaded.
              this._pushToHistory(params, false);
              this.previousHash = window.location.hash.substring(1);
            }
            this.updatePreviousBookmark = this.nextHashParam ? false : true;
            if (target) {
              // If the current document is reloaded,
              // avoid creating duplicate entries in the history.
              this._updatePreviousBookmark();
            }
            return;
          }
          if (this.nextHashParam) {
            if (this.nextHashParam === params.hash) {
              this.nextHashParam = null;
              this.updatePreviousBookmark = true;
              return;
            } else {
              this.nextHashParam = null;
            }
          }
          if (params.hash) {
            if (this.current.hash) {
              if (this.current.hash !== params.hash) {
                this._pushToHistory(params, true);
              } else {
                if (!this.current.page && params.page) {
                  this._pushToHistory(params, false, true);
                }
                this.updatePreviousBookmark = true;
              }
            } else {
              this._pushToHistory(params, true);
            }
          } else if (this.current.page && params.page && this.current.page !== params.page) {
            this._pushToHistory(params, true);
          }
        },
        _getPreviousParams: function pdfHistory_getPreviousParams(onlyCheckPage, beforeUnload) {
          if (!(this.currentBookmark && this.currentPage)) {
            return null;
          } else if (this.updatePreviousBookmark) {
            this.updatePreviousBookmark = false;
          }
          if (this.uid > 0 && !(this.previousBookmark && this.previousPage)) {
            // Prevent the history from getting stuck in the current state,
            // effectively preventing the user from going back/forward in
            // the history.
            //
            // This happens if the current position in the document didn't change
            // when the history was previously updated. The reasons for this are
            // either:
            // 1. The current zoom value is such that the document does not need to,
            //    or cannot, be scrolled to display the destination.
            // 2. The previous destination is broken, and doesn't actally point to a
            //    position within the document.
            //    (This is either due to a bad PDF generator, or the user making a
            //     mistake when entering a destination in the hash parameters.)
            return null;
          }
          if (!this.current.dest && !onlyCheckPage || beforeUnload) {
            if (this.previousBookmark === this.currentBookmark) {
              return null;
            }
          } else if (this.current.page || onlyCheckPage) {
            if (this.previousPage === this.currentPage) {
              return null;
            }
          } else {
            return null;
          }
          var params = {
            hash: this.currentBookmark,
            page: this.currentPage
          };
          if (this.isViewerInPresentationMode) {
            params.hash = null;
          }
          return params;
        },
        _stateObj: function pdfHistory_stateObj(params) {
          return {
            fingerprint: this.fingerprint,
            uid: this.uid,
            target: params
          };
        },
        _pushToHistory: function pdfHistory_pushToHistory(params, addPrevious, overwrite) {
          if (!this.initialized) {
            return;
          }
          if (!params.hash && params.page) {
            params.hash = 'page=' + params.page;
          }
          if (addPrevious && !overwrite) {
            var previousParams = this._getPreviousParams();
            if (previousParams) {
              var replacePrevious = !this.current.dest && this.current.hash !== this.previousHash;
              this._pushToHistory(previousParams, false, replacePrevious);
            }
          }
          this._pushOrReplaceState(this._stateObj(params), overwrite || this.uid === 0);
          this.currentUid = this.uid++;
          this.current = params;
          this.updatePreviousBookmark = true;
        },
        _goTo: function pdfHistory_goTo(state) {
          if (!(this.initialized && this.historyUnlocked && this._isStateObjectDefined(state))) {
            return;
          }
          if (!this.reInitialized && state.uid < this.currentUid) {
            var previousParams = this._getPreviousParams(true);
            if (previousParams) {
              this._pushToHistory(this.current, false);
              this._pushToHistory(previousParams, false);
              this.currentUid = state.uid;
              window.history.back();
              return;
            }
          }
          this.historyUnlocked = false;
          if (state.target.dest) {
            this.linkService.navigateTo(state.target.dest);
          } else {
            this.linkService.setHash(state.target.hash);
          }
          this.currentUid = state.uid;
          if (state.uid > this.uid) {
            this.uid = state.uid;
          }
          this.current = state.target;
          this.updatePreviousBookmark = true;
          var currentHash = window.location.hash.substring(1);
          if (this.previousHash !== currentHash) {
            this.allowHashChange = false;
          }
          this.previousHash = currentHash;
          this.historyUnlocked = true;
        },
        back: function pdfHistoryBack() {
          this.go(-1);
        },
        forward: function pdfHistoryForward() {
          this.go(1);
        },
        go: function pdfHistoryGo(direction) {
          if (this.initialized && this.historyUnlocked) {
            var state = window.history.state;
            if (direction === -1 && state && state.uid > 0) {
              window.history.back();
            } else if (direction === 1 && state && state.uid < this.uid - 1) {
              window.history.forward();
            }
          }
        }
      };
      exports.PDFHistory = PDFHistory;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFLinkService = {}, root.pdfjsWebUIUtils, root.pdfjsWebDOMEvents);
    }(this, function (exports, uiUtils, domEvents) {
      var parseQueryString = uiUtils.parseQueryString;
      var PageNumberRegExp = /^\d+$/;
      function isPageNumber(str) {
        return PageNumberRegExp.test(str);
      }
      /**
       * @typedef {Object} PDFLinkServiceOptions
       * @property {EventBus} eventBus - The application event bus.
       */
      /**
       * Performs navigation functions inside PDF, such as opening specified page,
       * or destination.
       * @class
       * @implements {IPDFLinkService}
       */
      var PDFLinkService = function PDFLinkServiceClosure() {
        /**
         * @constructs PDFLinkService
         * @param {PDFLinkServiceOptions} options
         */
        function PDFLinkService(options) {
          options = options || {};
          this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
          this.baseUrl = null;
          this.pdfDocument = null;
          this.pdfViewer = null;
          this.pdfHistory = null;
          this._pagesRefCache = null;
        }
        PDFLinkService.prototype = {
          setDocument: function PDFLinkService_setDocument(pdfDocument, baseUrl) {
            this.baseUrl = baseUrl;
            this.pdfDocument = pdfDocument;
            this._pagesRefCache = Object.create(null);
          },
          setViewer: function PDFLinkService_setViewer(pdfViewer) {
            this.pdfViewer = pdfViewer;
          },
          setHistory: function PDFLinkService_setHistory(pdfHistory) {
            this.pdfHistory = pdfHistory;
          },
          /**
           * @returns {number}
           */
          get pagesCount() {
            return this.pdfDocument ? this.pdfDocument.numPages : 0;
          },
          /**
           * @returns {number}
           */
          get page() {
            return this.pdfViewer.currentPageNumber;
          },
          /**
           * @param {number} value
           */
          set page(value) {
            this.pdfViewer.currentPageNumber = value;
          },
          /**
           * @param dest - The PDF destination object.
           */
          navigateTo: function PDFLinkService_navigateTo(dest) {
            var destString = '';
            var self = this;
            var goToDestination = function (destRef) {
              // dest array looks like that: <page-ref> </XYZ|/FitXXX> <args..>
              var pageNumber;
              if (destRef instanceof Object) {
                pageNumber = self._cachedPageNumber(destRef);
              } else if ((destRef | 0) === destRef) {
                // Integer
                pageNumber = destRef + 1;
              } else {
                console.error('PDFLinkService_navigateTo: "' + destRef + '" is not a valid destination reference.');
                return;
              }
              if (pageNumber) {
                if (pageNumber < 1 || pageNumber > self.pagesCount) {
                  console.error('PDFLinkService_navigateTo: "' + pageNumber + '" is a non-existent page number.');
                  return;
                }
                self.pdfViewer.scrollPageIntoView({
                  pageNumber: pageNumber,
                  destArray: dest
                });
                if (self.pdfHistory) {
                  // Update the browsing history.
                  self.pdfHistory.push({
                    dest: dest,
                    hash: destString,
                    page: pageNumber
                  });
                }
              } else {
                self.pdfDocument.getPageIndex(destRef).then(function (pageIndex) {
                  self.cachePageRef(pageIndex + 1, destRef);
                  goToDestination(destRef);
                }).catch(function () {
                  console.error('PDFLinkService_navigateTo: "' + destRef + '" is not a valid page reference.');
                  return;
                });
              }
            };
            var destinationPromise;
            if (typeof dest === 'string') {
              destString = dest;
              destinationPromise = this.pdfDocument.getDestination(dest);
            } else {
              destinationPromise = Promise.resolve(dest);
            }
            destinationPromise.then(function (destination) {
              dest = destination;
              if (!(destination instanceof Array)) {
                console.error('PDFLinkService_navigateTo: "' + destination + '" is not a valid destination array.');
                return;
              }
              goToDestination(destination[0]);
            });
          },
          /**
           * @param dest - The PDF destination object.
           * @returns {string} The hyperlink to the PDF object.
           */
          getDestinationHash: function PDFLinkService_getDestinationHash(dest) {
            if (typeof dest === 'string') {
              // In practice, a named destination may contain only a number.
              // If that happens, use the '#nameddest=' form to avoid the link
              // redirecting to a page, instead of the correct destination.
              return this.getAnchorUrl('#' + (isPageNumber(dest) ? 'nameddest=' : '') + escape(dest));
            }
            if (dest instanceof Array) {
              var str = JSON.stringify(dest);
              return this.getAnchorUrl('#' + escape(str));
            }
            return this.getAnchorUrl('');
          },
          /**
           * Prefix the full url on anchor links to make sure that links are resolved
           * relative to the current URL instead of the one defined in <base href>.
           * @param {String} anchor The anchor hash, including the #.
           * @returns {string} The hyperlink to the PDF object.
           */
          getAnchorUrl: function PDFLinkService_getAnchorUrl(anchor) {
            return (this.baseUrl || '') + anchor;
          },
          /**
           * @param {string} hash
           */
          setHash: function PDFLinkService_setHash(hash) {
            var pageNumber, dest;
            if (hash.indexOf('=') >= 0) {
              var params = parseQueryString(hash);
              if ('search' in params) {
                this.eventBus.dispatch('findfromurlhash', {
                  source: this,
                  query: params['search'].replace(/"/g, ''),
                  phraseSearch: params['phrase'] === 'true'
                });
              }
              // borrowing syntax from "Parameters for Opening PDF Files"
              if ('nameddest' in params) {
                if (this.pdfHistory) {
                  this.pdfHistory.updateNextHashParam(params.nameddest);
                }
                this.navigateTo(params.nameddest);
                return;
              }
              if ('page' in params) {
                pageNumber = params.page | 0 || 1;
              }
              if ('zoom' in params) {
                // Build the destination array.
                var zoomArgs = params.zoom.split(',');
                // scale,left,top
                var zoomArg = zoomArgs[0];
                var zoomArgNumber = parseFloat(zoomArg);
                if (zoomArg.indexOf('Fit') === -1) {
                  // If the zoomArg is a number, it has to get divided by 100. If it's
                  // a string, it should stay as it is.
                  dest = [
                    null,
                    { name: 'XYZ' },
                    zoomArgs.length > 1 ? zoomArgs[1] | 0 : null,
                    zoomArgs.length > 2 ? zoomArgs[2] | 0 : null,
                    zoomArgNumber ? zoomArgNumber / 100 : zoomArg
                  ];
                } else {
                  if (zoomArg === 'Fit' || zoomArg === 'FitB') {
                    dest = [
                      null,
                      { name: zoomArg }
                    ];
                  } else if (zoomArg === 'FitH' || zoomArg === 'FitBH' || (zoomArg === 'FitV' || zoomArg === 'FitBV')) {
                    dest = [
                      null,
                      { name: zoomArg },
                      zoomArgs.length > 1 ? zoomArgs[1] | 0 : null
                    ];
                  } else if (zoomArg === 'FitR') {
                    if (zoomArgs.length !== 5) {
                      console.error('PDFLinkService_setHash: ' + 'Not enough parameters for \'FitR\'.');
                    } else {
                      dest = [
                        null,
                        { name: zoomArg },
                        zoomArgs[1] | 0,
                        zoomArgs[2] | 0,
                        zoomArgs[3] | 0,
                        zoomArgs[4] | 0
                      ];
                    }
                  } else {
                    console.error('PDFLinkService_setHash: \'' + zoomArg + '\' is not a valid zoom value.');
                  }
                }
              }
              if (dest) {
                this.pdfViewer.scrollPageIntoView({
                  pageNumber: pageNumber || this.page,
                  destArray: dest,
                  allowNegativeOffset: true
                });
              } else if (pageNumber) {
                this.page = pageNumber;
              }
              // simple page
              if ('pagemode' in params) {
                this.eventBus.dispatch('pagemode', {
                  source: this,
                  mode: params.pagemode
                });
              }
            } else {
              dest = unescape(hash);
              try {
                dest = JSON.parse(dest);
                if (!(dest instanceof Array)) {
                  // Avoid incorrectly rejecting a valid named destination, such as
                  // e.g. "4.3" or "true", because `JSON.parse` converted its type.
                  dest = dest.toString();
                }
              } catch (ex) {
              }
              if (typeof dest === 'string' || isValidExplicitDestination(dest)) {
                if (this.pdfHistory) {
                  this.pdfHistory.updateNextHashParam(dest);
                }
                this.navigateTo(dest);
                return;
              }
              console.error('PDFLinkService_setHash: \'' + unescape(hash) + '\' is not a valid destination.');
            }
          },
          /**
           * @param {string} action
           */
          executeNamedAction: function PDFLinkService_executeNamedAction(action) {
            // See PDF reference, table 8.45 - Named action
            switch (action) {
            case 'GoBack':
              if (this.pdfHistory) {
                this.pdfHistory.back();
              }
              break;
            case 'GoForward':
              if (this.pdfHistory) {
                this.pdfHistory.forward();
              }
              break;
            case 'NextPage':
              if (this.page < this.pagesCount) {
                this.page++;
              }
              break;
            case 'PrevPage':
              if (this.page > 1) {
                this.page--;
              }
              break;
            case 'LastPage':
              this.page = this.pagesCount;
              break;
            case 'FirstPage':
              this.page = 1;
              break;
            default:
              break;
            }
            // No action according to spec
            this.eventBus.dispatch('namedaction', {
              source: this,
              action: action
            });
          },
          /**
           * @param {number} pageNum - page number.
           * @param {Object} pageRef - reference to the page.
           */
          cachePageRef: function PDFLinkService_cachePageRef(pageNum, pageRef) {
            var refStr = pageRef.num + ' ' + pageRef.gen + ' R';
            this._pagesRefCache[refStr] = pageNum;
          },
          _cachedPageNumber: function PDFLinkService_cachedPageNumber(pageRef) {
            var refStr = pageRef.num + ' ' + pageRef.gen + ' R';
            return this._pagesRefCache && this._pagesRefCache[refStr] || null;
          }
        };
        function isValidExplicitDestination(dest) {
          if (!(dest instanceof Array)) {
            return false;
          }
          var destLength = dest.length, allowNull = true;
          if (destLength < 2) {
            return false;
          }
          var page = dest[0];
          if (!(typeof page === 'object' && typeof page.num === 'number' && (page.num | 0) === page.num && typeof page.gen === 'number' && (page.gen | 0) === page.gen) && !(typeof page === 'number' && (page | 0) === page && page >= 0)) {
            return false;
          }
          var zoom = dest[1];
          if (!(typeof zoom === 'object' && typeof zoom.name === 'string')) {
            return false;
          }
          switch (zoom.name) {
          case 'XYZ':
            if (destLength !== 5) {
              return false;
            }
            break;
          case 'Fit':
          case 'FitB':
            return destLength === 2;
          case 'FitH':
          case 'FitBH':
          case 'FitV':
          case 'FitBV':
            if (destLength !== 3) {
              return false;
            }
            break;
          case 'FitR':
            if (destLength !== 6) {
              return false;
            }
            allowNull = false;
            break;
          default:
            return false;
          }
          for (var i = 2; i < destLength; i++) {
            var param = dest[i];
            if (!(typeof param === 'number' || allowNull && param === null)) {
              return false;
            }
          }
          return true;
        }
        return PDFLinkService;
      }();
      var SimpleLinkService = function SimpleLinkServiceClosure() {
        function SimpleLinkService() {
        }
        SimpleLinkService.prototype = {
          /**
           * @returns {number}
           */
          get page() {
            return 0;
          },
          /**
           * @param {number} value
           */
          set page(value) {
          },
          /**
           * @param dest - The PDF destination object.
           */
          navigateTo: function (dest) {
          },
          /**
           * @param dest - The PDF destination object.
           * @returns {string} The hyperlink to the PDF object.
           */
          getDestinationHash: function (dest) {
            return '#';
          },
          /**
           * @param hash - The PDF parameters/hash.
           * @returns {string} The hyperlink to the PDF object.
           */
          getAnchorUrl: function (hash) {
            return '#';
          },
          /**
           * @param {string} hash
           */
          setHash: function (hash) {
          },
          /**
           * @param {string} action
           */
          executeNamedAction: function (action) {
          },
          /**
           * @param {number} pageNum - page number.
           * @param {Object} pageRef - reference to the page.
           */
          cachePageRef: function (pageNum, pageRef) {
          }
        };
        return SimpleLinkService;
      }();
      exports.PDFLinkService = PDFLinkService;
      exports.SimpleLinkService = SimpleLinkService;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFPageView = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFRenderingQueue, root.pdfjsWebDOMEvents, root.pdfjsWebPDFJS);
    }(this, function (exports, uiUtils, pdfRenderingQueue, domEvents, pdfjsLib) {
      var CSS_UNITS = uiUtils.CSS_UNITS;
      var DEFAULT_SCALE = uiUtils.DEFAULT_SCALE;
      var getOutputScale = uiUtils.getOutputScale;
      var approximateFraction = uiUtils.approximateFraction;
      var roundToDivide = uiUtils.roundToDivide;
      var RenderingStates = pdfRenderingQueue.RenderingStates;
      var TEXT_LAYER_RENDER_DELAY = 200;
      // ms
      /**
       * @typedef {Object} PDFPageViewOptions
       * @property {HTMLDivElement} container - The viewer element.
       * @property {EventBus} eventBus - The application event bus.
       * @property {number} id - The page unique ID (normally its number).
       * @property {number} scale - The page scale display.
       * @property {PageViewport} defaultViewport - The page viewport.
       * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
       * @property {IPDFTextLayerFactory} textLayerFactory
       * @property {IPDFAnnotationLayerFactory} annotationLayerFactory
       * @property {boolean} enhanceTextSelection - Turns on the text selection
       *   enhancement. The default is `false`.
       * @property {boolean} renderInteractiveForms - Turns on rendering of
       *   interactive form elements. The default is `false`.
       */
      /**
       * @class
       * @implements {IRenderableView}
       */
      var PDFPageView = function PDFPageViewClosure() {
        /**
         * @constructs PDFPageView
         * @param {PDFPageViewOptions} options
         */
        function PDFPageView(options) {
          var container = options.container;
          var id = options.id;
          var scale = options.scale;
          var defaultViewport = options.defaultViewport;
          var renderingQueue = options.renderingQueue;
          var textLayerFactory = options.textLayerFactory;
          var annotationLayerFactory = options.annotationLayerFactory;
          var enhanceTextSelection = options.enhanceTextSelection || false;
          var renderInteractiveForms = options.renderInteractiveForms || false;
          this.id = id;
          this.renderingId = 'page' + id;
          this.pageLabel = null;
          this.rotation = 0;
          this.scale = scale || DEFAULT_SCALE;
          this.viewport = defaultViewport;
          this.pdfPageRotate = defaultViewport.rotation;
          this.hasRestrictedScaling = false;
          this.enhanceTextSelection = enhanceTextSelection;
          this.renderInteractiveForms = renderInteractiveForms;
          this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
          this.renderingQueue = renderingQueue;
          this.textLayerFactory = textLayerFactory;
          this.annotationLayerFactory = annotationLayerFactory;
          this.renderTask = null;
          this.renderingState = RenderingStates.INITIAL;
          this.resume = null;
          this.onBeforeDraw = null;
          this.onAfterDraw = null;
          this.textLayer = null;
          this.zoomLayer = null;
          this.annotationLayer = null;
          var div = document.createElement('div');
          div.id = 'pageContainer' + this.id;
          div.className = 'page';
          div.style.width = Math.floor(this.viewport.width) + 'px';
          div.style.height = Math.floor(this.viewport.height) + 'px';
          div.setAttribute('data-page-number', this.id);
          this.div = div;
          container.appendChild(div);
        }
        PDFPageView.prototype = {
          setPdfPage: function PDFPageView_setPdfPage(pdfPage) {
            this.pdfPage = pdfPage;
            this.pdfPageRotate = pdfPage.rotate;
            var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
            this.viewport = pdfPage.getViewport(this.scale * CSS_UNITS, totalRotation);
            this.stats = pdfPage.stats;
            this.reset();
          },
          destroy: function PDFPageView_destroy() {
            this.zoomLayer = null;
            this.reset();
            if (this.pdfPage) {
              this.pdfPage.cleanup();
            }
          },
          reset: function PDFPageView_reset(keepZoomLayer, keepAnnotations) {
            this.cancelRendering();
            var div = this.div;
            div.style.width = Math.floor(this.viewport.width) + 'px';
            div.style.height = Math.floor(this.viewport.height) + 'px';
            var childNodes = div.childNodes;
            var currentZoomLayerNode = keepZoomLayer && this.zoomLayer || null;
            var currentAnnotationNode = keepAnnotations && this.annotationLayer && this.annotationLayer.div || null;
            for (var i = childNodes.length - 1; i >= 0; i--) {
              var node = childNodes[i];
              if (currentZoomLayerNode === node || currentAnnotationNode === node) {
                continue;
              }
              div.removeChild(node);
            }
            div.removeAttribute('data-loaded');
            if (currentAnnotationNode) {
              // Hide annotationLayer until all elements are resized
              // so they are not displayed on the already-resized page
              this.annotationLayer.hide();
            } else {
              this.annotationLayer = null;
            }
            if (this.canvas && !currentZoomLayerNode) {
              // Zeroing the width and height causes Firefox to release graphics
              // resources immediately, which can greatly reduce memory consumption.
              this.canvas.width = 0;
              this.canvas.height = 0;
              delete this.canvas;
            }
            this.loadingIconDiv = document.createElement('div');
            this.loadingIconDiv.className = 'loadingIcon';
            div.appendChild(this.loadingIconDiv);
          },
          update: function PDFPageView_update(scale, rotation) {
            this.scale = scale || this.scale;
            if (typeof rotation !== 'undefined') {
              this.rotation = rotation;
            }
            var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
            this.viewport = this.viewport.clone({
              scale: this.scale * CSS_UNITS,
              rotation: totalRotation
            });
            var isScalingRestricted = false;
            if (this.canvas && pdfjsLib.PDFJS.maxCanvasPixels > 0) {
              var outputScale = this.outputScale;
              if ((Math.floor(this.viewport.width) * outputScale.sx | 0) * (Math.floor(this.viewport.height) * outputScale.sy | 0) > pdfjsLib.PDFJS.maxCanvasPixels) {
                isScalingRestricted = true;
              }
            }
            if (this.canvas) {
              if (pdfjsLib.PDFJS.useOnlyCssZoom || this.hasRestrictedScaling && isScalingRestricted) {
                this.cssTransform(this.canvas, true);
                this.eventBus.dispatch('pagerendered', {
                  source: this,
                  pageNumber: this.id,
                  cssTransform: true
                });
                return;
              }
              if (!this.zoomLayer) {
                this.zoomLayer = this.canvas.parentNode;
                this.zoomLayer.style.position = 'absolute';
              }
            }
            if (this.zoomLayer) {
              this.cssTransform(this.zoomLayer.firstChild);
            }
            this.reset(/* keepZoomLayer = */
            true, /* keepAnnotations = */
            true);
          },
          cancelRendering: function PDFPageView_cancelRendering() {
            if (this.renderTask) {
              this.renderTask.cancel();
              this.renderTask = null;
            }
            this.renderingState = RenderingStates.INITIAL;
            this.resume = null;
            if (this.textLayer) {
              this.textLayer.cancel();
              this.textLayer = null;
            }
          },
          /**
           * Called when moved in the parent's container.
           */
          updatePosition: function PDFPageView_updatePosition() {
            if (this.textLayer) {
              this.textLayer.render(TEXT_LAYER_RENDER_DELAY);
            }
          },
          cssTransform: function PDFPageView_transform(canvas, redrawAnnotations) {
            var CustomStyle = pdfjsLib.CustomStyle;
            // Scale canvas, canvas wrapper, and page container.
            var width = this.viewport.width;
            var height = this.viewport.height;
            var div = this.div;
            canvas.style.width = canvas.parentNode.style.width = div.style.width = Math.floor(width) + 'px';
            canvas.style.height = canvas.parentNode.style.height = div.style.height = Math.floor(height) + 'px';
            // The canvas may have been originally rotated, rotate relative to that.
            var relativeRotation = this.viewport.rotation - canvas._viewport.rotation;
            var absRotation = Math.abs(relativeRotation);
            var scaleX = 1, scaleY = 1;
            if (absRotation === 90 || absRotation === 270) {
              // Scale x and y because of the rotation.
              scaleX = height / width;
              scaleY = width / height;
            }
            var cssTransform = 'rotate(' + relativeRotation + 'deg) ' + 'scale(' + scaleX + ',' + scaleY + ')';
            CustomStyle.setProp('transform', canvas, cssTransform);
            if (this.textLayer) {
              // Rotating the text layer is more complicated since the divs inside the
              // the text layer are rotated.
              // TODO: This could probably be simplified by drawing the text layer in
              // one orientation then rotating overall.
              var textLayerViewport = this.textLayer.viewport;
              var textRelativeRotation = this.viewport.rotation - textLayerViewport.rotation;
              var textAbsRotation = Math.abs(textRelativeRotation);
              var scale = width / textLayerViewport.width;
              if (textAbsRotation === 90 || textAbsRotation === 270) {
                scale = width / textLayerViewport.height;
              }
              var textLayerDiv = this.textLayer.textLayerDiv;
              var transX, transY;
              switch (textAbsRotation) {
              case 0:
                transX = transY = 0;
                break;
              case 90:
                transX = 0;
                transY = '-' + textLayerDiv.style.height;
                break;
              case 180:
                transX = '-' + textLayerDiv.style.width;
                transY = '-' + textLayerDiv.style.height;
                break;
              case 270:
                transX = '-' + textLayerDiv.style.width;
                transY = 0;
                break;
              default:
                console.error('Bad rotation value.');
                break;
              }
              CustomStyle.setProp('transform', textLayerDiv, 'rotate(' + textAbsRotation + 'deg) ' + 'scale(' + scale + ', ' + scale + ') ' + 'translate(' + transX + ', ' + transY + ')');
              CustomStyle.setProp('transformOrigin', textLayerDiv, '0% 0%');
            }
            if (redrawAnnotations && this.annotationLayer) {
              this.annotationLayer.render(this.viewport, 'display');
            }
          },
          get width() {
            return this.viewport.width;
          },
          get height() {
            return this.viewport.height;
          },
          getPagePoint: function PDFPageView_getPagePoint(x, y) {
            return this.viewport.convertToPdfPoint(x, y);
          },
          draw: function PDFPageView_draw() {
            if (this.renderingState !== RenderingStates.INITIAL) {
              console.error('Must be in new state before drawing');
              this.reset();
            }
            // Ensure that we reset all state to prevent issues.
            this.renderingState = RenderingStates.RUNNING;
            var pdfPage = this.pdfPage;
            var viewport = this.viewport;
            var div = this.div;
            // Wrap the canvas so if it has a css transform for highdpi the overflow
            // will be hidden in FF.
            var canvasWrapper = document.createElement('div');
            canvasWrapper.style.width = div.style.width;
            canvasWrapper.style.height = div.style.height;
            canvasWrapper.classList.add('canvasWrapper');
            var canvas = document.createElement('canvas');
            canvas.id = 'page' + this.id;
            // Keep the canvas hidden until the first draw callback, or until drawing
            // is complete when `!this.renderingQueue`, to prevent black flickering.
            canvas.setAttribute('hidden', 'hidden');
            var isCanvasHidden = true;
            canvasWrapper.appendChild(canvas);
            if (this.annotationLayer && this.annotationLayer.div) {
              // annotationLayer needs to stay on top
              div.insertBefore(canvasWrapper, this.annotationLayer.div);
            } else {
              div.appendChild(canvasWrapper);
            }
            this.canvas = canvas;
            canvas.mozOpaque = true;
            var ctx = canvas.getContext('2d', { alpha: false });
            var outputScale = getOutputScale(ctx);
            this.outputScale = outputScale;
            if (pdfjsLib.PDFJS.useOnlyCssZoom) {
              var actualSizeViewport = viewport.clone({ scale: CSS_UNITS });
              // Use a scale that will make the canvas be the original intended size
              // of the page.
              outputScale.sx *= actualSizeViewport.width / viewport.width;
              outputScale.sy *= actualSizeViewport.height / viewport.height;
              outputScale.scaled = true;
            }
            if (pdfjsLib.PDFJS.maxCanvasPixels > 0) {
              var pixelsInViewport = viewport.width * viewport.height;
              var maxScale = Math.sqrt(pdfjsLib.PDFJS.maxCanvasPixels / pixelsInViewport);
              if (outputScale.sx > maxScale || outputScale.sy > maxScale) {
                outputScale.sx = maxScale;
                outputScale.sy = maxScale;
                outputScale.scaled = true;
                this.hasRestrictedScaling = true;
              } else {
                this.hasRestrictedScaling = false;
              }
            }
            var sfx = approximateFraction(outputScale.sx);
            var sfy = approximateFraction(outputScale.sy);
            canvas.width = roundToDivide(viewport.width * outputScale.sx, sfx[0]);
            canvas.height = roundToDivide(viewport.height * outputScale.sy, sfy[0]);
            canvas.style.width = roundToDivide(viewport.width, sfx[1]) + 'px';
            canvas.style.height = roundToDivide(viewport.height, sfy[1]) + 'px';
            // Add the viewport so it's known what it was originally drawn with.
            canvas._viewport = viewport;
            var textLayerDiv = null;
            var textLayer = null;
            if (this.textLayerFactory) {
              textLayerDiv = document.createElement('div');
              textLayerDiv.className = 'textLayer';
              textLayerDiv.style.width = canvasWrapper.style.width;
              textLayerDiv.style.height = canvasWrapper.style.height;
              if (this.annotationLayer && this.annotationLayer.div) {
                // annotationLayer needs to stay on top
                div.insertBefore(textLayerDiv, this.annotationLayer.div);
              } else {
                div.appendChild(textLayerDiv);
              }
              textLayer = this.textLayerFactory.createTextLayerBuilder(textLayerDiv, this.id - 1, this.viewport, this.enhanceTextSelection);
            }
            this.textLayer = textLayer;
            var resolveRenderPromise, rejectRenderPromise;
            var promise = new Promise(function (resolve, reject) {
              resolveRenderPromise = resolve;
              rejectRenderPromise = reject;
            });
            // Rendering area
            var self = this;
            function pageViewDrawCallback(error) {
              // The renderTask may have been replaced by a new one, so only remove
              // the reference to the renderTask if it matches the one that is
              // triggering this callback.
              if (renderTask === self.renderTask) {
                self.renderTask = null;
              }
              if (error === 'cancelled') {
                rejectRenderPromise(error);
                return;
              }
              self.renderingState = RenderingStates.FINISHED;
              if (isCanvasHidden) {
                self.canvas.removeAttribute('hidden');
                isCanvasHidden = false;
              }
              if (self.loadingIconDiv) {
                div.removeChild(self.loadingIconDiv);
                delete self.loadingIconDiv;
              }
              if (self.zoomLayer) {
                // Zeroing the width and height causes Firefox to release graphics
                // resources immediately, which can greatly reduce memory consumption.
                var zoomLayerCanvas = self.zoomLayer.firstChild;
                zoomLayerCanvas.width = 0;
                zoomLayerCanvas.height = 0;
                if (div.contains(self.zoomLayer)) {
                  // Prevent "Node was not found" errors if the `zoomLayer` was
                  // already removed. This may occur intermittently if the scale
                  // changes many times in very quick succession.
                  div.removeChild(self.zoomLayer);
                }
                self.zoomLayer = null;
              }
              self.error = error;
              self.stats = pdfPage.stats;
              if (self.onAfterDraw) {
                self.onAfterDraw();
              }
              self.eventBus.dispatch('pagerendered', {
                source: self,
                pageNumber: self.id,
                cssTransform: false
              });
              if (!error) {
                resolveRenderPromise(undefined);
              } else {
                rejectRenderPromise(error);
              }
            }
            var renderContinueCallback = null;
            if (this.renderingQueue) {
              renderContinueCallback = function renderContinueCallback(cont) {
                if (!self.renderingQueue.isHighestPriority(self)) {
                  self.renderingState = RenderingStates.PAUSED;
                  self.resume = function resumeCallback() {
                    self.renderingState = RenderingStates.RUNNING;
                    cont();
                  };
                  return;
                }
                if (isCanvasHidden) {
                  self.canvas.removeAttribute('hidden');
                  isCanvasHidden = false;
                }
                cont();
              };
            }
            var transform = !outputScale.scaled ? null : [
              outputScale.sx,
              0,
              0,
              outputScale.sy,
              0,
              0
            ];
            var renderContext = {
              canvasContext: ctx,
              transform: transform,
              viewport: this.viewport,
              renderInteractiveForms: this.renderInteractiveForms
            };
            // intent: 'default', // === 'display'
            var renderTask = this.renderTask = this.pdfPage.render(renderContext);
            renderTask.onContinue = renderContinueCallback;
            this.renderTask.promise.then(function pdfPageRenderCallback() {
              pageViewDrawCallback(null);
              if (textLayer) {
                self.pdfPage.getTextContent({ normalizeWhitespace: true }).then(function textContentResolved(textContent) {
                  textLayer.setTextContent(textContent);
                  textLayer.render(TEXT_LAYER_RENDER_DELAY);
                });
              }
            }, function pdfPageRenderError(error) {
              pageViewDrawCallback(error);
            });
            if (this.annotationLayerFactory) {
              if (!this.annotationLayer) {
                this.annotationLayer = this.annotationLayerFactory.createAnnotationLayerBuilder(div, this.pdfPage, this.renderInteractiveForms);
              }
              this.annotationLayer.render(this.viewport, 'display');
            }
            div.setAttribute('data-loaded', true);
            if (self.onBeforeDraw) {
              self.onBeforeDraw();
            }
            return promise;
          },
          /**
           * @param {string|null} label
           */
          setPageLabel: function PDFView_setPageLabel(label) {
            this.pageLabel = typeof label === 'string' ? label : null;
            if (this.pageLabel !== null) {
              this.div.setAttribute('data-page-label', this.pageLabel);
            } else {
              this.div.removeAttribute('data-page-label');
            }
          }
        };
        return PDFPageView;
      }();
      exports.PDFPageView = PDFPageView;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFThumbnailViewer = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFThumbnailView);
    }(this, function (exports, uiUtils, pdfThumbnailView) {
      var watchScroll = uiUtils.watchScroll;
      var getVisibleElements = uiUtils.getVisibleElements;
      var scrollIntoView = uiUtils.scrollIntoView;
      var PDFThumbnailView = pdfThumbnailView.PDFThumbnailView;
      var THUMBNAIL_SCROLL_MARGIN = -19;
      /**
       * @typedef {Object} PDFThumbnailViewerOptions
       * @property {HTMLDivElement} container - The container for the thumbnail
       *   elements.
       * @property {IPDFLinkService} linkService - The navigation/linking service.
       * @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
       */
      /**
       * Simple viewer control to display thumbnails for pages.
       * @class
       * @implements {IRenderableView}
       */
      var PDFThumbnailViewer = function PDFThumbnailViewerClosure() {
        /**
         * @constructs PDFThumbnailViewer
         * @param {PDFThumbnailViewerOptions} options
         */
        function PDFThumbnailViewer(options) {
          this.container = options.container;
          this.renderingQueue = options.renderingQueue;
          this.linkService = options.linkService;
          this.scroll = watchScroll(this.container, this._scrollUpdated.bind(this));
          this._resetView();
        }
        PDFThumbnailViewer.prototype = {
          /**
           * @private
           */
          _scrollUpdated: function PDFThumbnailViewer_scrollUpdated() {
            this.renderingQueue.renderHighestPriority();
          },
          getThumbnail: function PDFThumbnailViewer_getThumbnail(index) {
            return this.thumbnails[index];
          },
          /**
           * @private
           */
          _getVisibleThumbs: function PDFThumbnailViewer_getVisibleThumbs() {
            return getVisibleElements(this.container, this.thumbnails);
          },
          scrollThumbnailIntoView: function PDFThumbnailViewer_scrollThumbnailIntoView(page) {
            var selected = document.querySelector('.thumbnail.selected');
            if (selected) {
              selected.classList.remove('selected');
            }
            var thumbnail = document.getElementById('thumbnailContainer' + page);
            if (thumbnail) {
              thumbnail.classList.add('selected');
            }
            var visibleThumbs = this._getVisibleThumbs();
            var numVisibleThumbs = visibleThumbs.views.length;
            // If the thumbnail isn't currently visible, scroll it into view.
            if (numVisibleThumbs > 0) {
              var first = visibleThumbs.first.id;
              // Account for only one thumbnail being visible.
              var last = numVisibleThumbs > 1 ? visibleThumbs.last.id : first;
              if (page <= first || page >= last) {
                scrollIntoView(thumbnail, { top: THUMBNAIL_SCROLL_MARGIN });
              }
            }
          },
          get pagesRotation() {
            return this._pagesRotation;
          },
          set pagesRotation(rotation) {
            this._pagesRotation = rotation;
            for (var i = 0, l = this.thumbnails.length; i < l; i++) {
              var thumb = this.thumbnails[i];
              thumb.update(rotation);
            }
          },
          cleanup: function PDFThumbnailViewer_cleanup() {
            var tempCanvas = PDFThumbnailView.tempImageCache;
            if (tempCanvas) {
              // Zeroing the width and height causes Firefox to release graphics
              // resources immediately, which can greatly reduce memory consumption.
              tempCanvas.width = 0;
              tempCanvas.height = 0;
            }
            PDFThumbnailView.tempImageCache = null;
          },
          /**
           * @private
           */
          _resetView: function PDFThumbnailViewer_resetView() {
            this.thumbnails = [];
            this._pageLabels = null;
            this._pagesRotation = 0;
            this._pagesRequests = [];
            // Remove the thumbnails from the DOM.
            this.container.textContent = '';
          },
          setDocument: function PDFThumbnailViewer_setDocument(pdfDocument) {
            if (this.pdfDocument) {
              this._cancelRendering();
              this._resetView();
            }
            this.pdfDocument = pdfDocument;
            if (!pdfDocument) {
              return Promise.resolve();
            }
            return pdfDocument.getPage(1).then(function (firstPage) {
              var pagesCount = pdfDocument.numPages;
              var viewport = firstPage.getViewport(1.0);
              for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
                var thumbnail = new PDFThumbnailView({
                  container: this.container,
                  id: pageNum,
                  defaultViewport: viewport.clone(),
                  linkService: this.linkService,
                  renderingQueue: this.renderingQueue,
                  disableCanvasToImageConversion: false
                });
                this.thumbnails.push(thumbnail);
              }
            }.bind(this));
          },
          /**
           * @private
           */
          _cancelRendering: function PDFThumbnailViewer_cancelRendering() {
            for (var i = 0, ii = this.thumbnails.length; i < ii; i++) {
              if (this.thumbnails[i]) {
                this.thumbnails[i].cancelRendering();
              }
            }
          },
          /**
           * @param {Array|null} labels
           */
          setPageLabels: function PDFThumbnailViewer_setPageLabels(labels) {
            if (!this.pdfDocument) {
              return;
            }
            if (!labels) {
              this._pageLabels = null;
            } else if (!(labels instanceof Array && this.pdfDocument.numPages === labels.length)) {
              this._pageLabels = null;
              console.error('PDFThumbnailViewer_setPageLabels: Invalid page labels.');
            } else {
              this._pageLabels = labels;
            }
            // Update all the `PDFThumbnailView` instances.
            for (var i = 0, ii = this.thumbnails.length; i < ii; i++) {
              var thumbnailView = this.thumbnails[i];
              var label = this._pageLabels && this._pageLabels[i];
              thumbnailView.setPageLabel(label);
            }
          },
          /**
           * @param {PDFThumbnailView} thumbView
           * @returns {PDFPage}
           * @private
           */
          _ensurePdfPageLoaded: function PDFThumbnailViewer_ensurePdfPageLoaded(thumbView) {
            if (thumbView.pdfPage) {
              return Promise.resolve(thumbView.pdfPage);
            }
            var pageNumber = thumbView.id;
            if (this._pagesRequests[pageNumber]) {
              return this._pagesRequests[pageNumber];
            }
            var promise = this.pdfDocument.getPage(pageNumber).then(function (pdfPage) {
              thumbView.setPdfPage(pdfPage);
              this._pagesRequests[pageNumber] = null;
              return pdfPage;
            }.bind(this));
            this._pagesRequests[pageNumber] = promise;
            return promise;
          },
          forceRendering: function () {
            var visibleThumbs = this._getVisibleThumbs();
            var thumbView = this.renderingQueue.getHighestPriority(visibleThumbs, this.thumbnails, this.scroll.down);
            if (thumbView) {
              this._ensurePdfPageLoaded(thumbView).then(function () {
                this.renderingQueue.renderView(thumbView);
              }.bind(this));
              return true;
            }
            return false;
          }
        };
        return PDFThumbnailViewer;
      }();
      exports.PDFThumbnailViewer = PDFThumbnailViewer;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebTextLayerBuilder = {}, root.pdfjsWebDOMEvents, root.pdfjsWebPDFJS);
    }(this, function (exports, domEvents, pdfjsLib) {
      var EXPAND_DIVS_TIMEOUT = 300;
      // ms
      /**
       * @typedef {Object} TextLayerBuilderOptions
       * @property {HTMLDivElement} textLayerDiv - The text layer container.
       * @property {EventBus} eventBus - The application event bus.
       * @property {number} pageIndex - The page index.
       * @property {PageViewport} viewport - The viewport of the text layer.
       * @property {PDFFindController} findController
       * @property {boolean} enhanceTextSelection - Option to turn on improved
       *   text selection.
       */
      /**
       * TextLayerBuilder provides text-selection functionality for the PDF.
       * It does this by creating overlay divs over the PDF text. These divs
       * contain text that matches the PDF text they are overlaying. This object
       * also provides a way to highlight text that is being searched for.
       * @class
       */
      var TextLayerBuilder = function TextLayerBuilderClosure() {
        function TextLayerBuilder(options) {
          this.textLayerDiv = options.textLayerDiv;
          this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
          this.textContent = null;
          this.renderingDone = false;
          this.pageIdx = options.pageIndex;
          this.pageNumber = this.pageIdx + 1;
          this.matches = [];
          this.viewport = options.viewport;
          this.textDivs = [];
          this.findController = options.findController || null;
          this.textLayerRenderTask = null;
          this.enhanceTextSelection = options.enhanceTextSelection;
          this._bindMouse();
        }
        TextLayerBuilder.prototype = {
          /**
           * @private
           */
          _finishRendering: function TextLayerBuilder_finishRendering() {
            this.renderingDone = true;
            if (!this.enhanceTextSelection) {
              var endOfContent = document.createElement('div');
              endOfContent.className = 'endOfContent';
              this.textLayerDiv.appendChild(endOfContent);
            }
            this.eventBus.dispatch('textlayerrendered', {
              source: this,
              pageNumber: this.pageNumber,
              numTextDivs: this.textDivs.length
            });
          },
          /**
           * Renders the text layer.
           * @param {number} timeout (optional) if specified, the rendering waits
           *   for specified amount of ms.
           */
          render: function TextLayerBuilder_render(timeout) {
            if (!this.textContent || this.renderingDone) {
              return;
            }
            this.cancel();
            this.textDivs = [];
            var textLayerFrag = document.createDocumentFragment();
            this.textLayerRenderTask = pdfjsLib.renderTextLayer({
              textContent: this.textContent,
              container: textLayerFrag,
              viewport: this.viewport,
              textDivs: this.textDivs,
              timeout: timeout,
              enhanceTextSelection: this.enhanceTextSelection
            });
            this.textLayerRenderTask.promise.then(function () {
              this.textLayerDiv.appendChild(textLayerFrag);
              this._finishRendering();
              this.updateMatches();
            }.bind(this), function (reason) {
            });
          },
          /**
           * Cancels rendering of the text layer.
           */
          cancel: function TextLayerBuilder_cancel() {
            if (this.textLayerRenderTask) {
              this.textLayerRenderTask.cancel();
              this.textLayerRenderTask = null;
            }
          },
          setTextContent: function TextLayerBuilder_setTextContent(textContent) {
            this.cancel();
            this.textContent = textContent;
          },
          convertMatches: function TextLayerBuilder_convertMatches(matches, matchesLength) {
            var i = 0;
            var iIndex = 0;
            var bidiTexts = this.textContent.items;
            var end = bidiTexts.length - 1;
            var queryLen = this.findController === null ? 0 : this.findController.state.query.length;
            var ret = [];
            if (!matches) {
              return ret;
            }
            for (var m = 0, len = matches.length; m < len; m++) {
              // Calculate the start position.
              var matchIdx = matches[m];
              // Loop over the divIdxs.
              while (i !== end && matchIdx >= iIndex + bidiTexts[i].str.length) {
                iIndex += bidiTexts[i].str.length;
                i++;
              }
              if (i === bidiTexts.length) {
                console.error('Could not find a matching mapping');
              }
              var match = {
                begin: {
                  divIdx: i,
                  offset: matchIdx - iIndex
                }
              };
              // Calculate the end position.
              if (matchesLength) {
                // multiterm search
                matchIdx += matchesLength[m];
              } else {
                // phrase search
                matchIdx += queryLen;
              }
              // Somewhat the same array as above, but use > instead of >= to get
              // the end position right.
              while (i !== end && matchIdx > iIndex + bidiTexts[i].str.length) {
                iIndex += bidiTexts[i].str.length;
                i++;
              }
              match.end = {
                divIdx: i,
                offset: matchIdx - iIndex
              };
              ret.push(match);
            }
            return ret;
          },
          renderMatches: function TextLayerBuilder_renderMatches(matches) {
            // Early exit if there is nothing to render.
            if (matches.length === 0) {
              return;
            }
            var bidiTexts = this.textContent.items;
            var textDivs = this.textDivs;
            var prevEnd = null;
            var pageIdx = this.pageIdx;
            var isSelectedPage = this.findController === null ? false : pageIdx === this.findController.selected.pageIdx;
            var selectedMatchIdx = this.findController === null ? -1 : this.findController.selected.matchIdx;
            var highlightAll = this.findController === null ? false : this.findController.state.highlightAll;
            var infinity = {
              divIdx: -1,
              offset: undefined
            };
            function beginText(begin, className) {
              var divIdx = begin.divIdx;
              textDivs[divIdx].textContent = '';
              appendTextToDiv(divIdx, 0, begin.offset, className);
            }
            function appendTextToDiv(divIdx, fromOffset, toOffset, className) {
              var div = textDivs[divIdx];
              var content = bidiTexts[divIdx].str.substring(fromOffset, toOffset);
              var node = document.createTextNode(content);
              if (className) {
                var span = document.createElement('span');
                span.className = className;
                span.appendChild(node);
                div.appendChild(span);
                return;
              }
              div.appendChild(node);
            }
            var i0 = selectedMatchIdx, i1 = i0 + 1;
            if (highlightAll) {
              i0 = 0;
              i1 = matches.length;
            } else if (!isSelectedPage) {
              // Not highlighting all and this isn't the selected page, so do nothing.
              return;
            }
            for (var i = i0; i < i1; i++) {
              var match = matches[i];
              var begin = match.begin;
              var end = match.end;
              var isSelected = isSelectedPage && i === selectedMatchIdx;
              var highlightSuffix = isSelected ? ' selected' : '';
              if (this.findController) {
                this.findController.updateMatchPosition(pageIdx, i, textDivs, begin.divIdx);
              }
              // Match inside new div.
              if (!prevEnd || begin.divIdx !== prevEnd.divIdx) {
                // If there was a previous div, then add the text at the end.
                if (prevEnd !== null) {
                  appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);
                }
                // Clear the divs and set the content until the starting point.
                beginText(begin);
              } else {
                appendTextToDiv(prevEnd.divIdx, prevEnd.offset, begin.offset);
              }
              if (begin.divIdx === end.divIdx) {
                appendTextToDiv(begin.divIdx, begin.offset, end.offset, 'highlight' + highlightSuffix);
              } else {
                appendTextToDiv(begin.divIdx, begin.offset, infinity.offset, 'highlight begin' + highlightSuffix);
                for (var n0 = begin.divIdx + 1, n1 = end.divIdx; n0 < n1; n0++) {
                  textDivs[n0].className = 'highlight middle' + highlightSuffix;
                }
                beginText(end, 'highlight end' + highlightSuffix);
              }
              prevEnd = end;
            }
            if (prevEnd) {
              appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);
            }
          },
          updateMatches: function TextLayerBuilder_updateMatches() {
            // Only show matches when all rendering is done.
            if (!this.renderingDone) {
              return;
            }
            // Clear all matches.
            var matches = this.matches;
            var textDivs = this.textDivs;
            var bidiTexts = this.textContent.items;
            var clearedUntilDivIdx = -1;
            // Clear all current matches.
            for (var i = 0, len = matches.length; i < len; i++) {
              var match = matches[i];
              var begin = Math.max(clearedUntilDivIdx, match.begin.divIdx);
              for (var n = begin, end = match.end.divIdx; n <= end; n++) {
                var div = textDivs[n];
                div.textContent = bidiTexts[n].str;
                div.className = '';
              }
              clearedUntilDivIdx = match.end.divIdx + 1;
            }
            if (this.findController === null || !this.findController.active) {
              return;
            }
            // Convert the matches on the page controller into the match format
            // used for the textLayer.
            var pageMatches, pageMatchesLength;
            if (this.findController !== null) {
              pageMatches = this.findController.pageMatches[this.pageIdx] || null;
              pageMatchesLength = this.findController.pageMatchesLength ? this.findController.pageMatchesLength[this.pageIdx] || null : null;
            }
            this.matches = this.convertMatches(pageMatches, pageMatchesLength);
            this.renderMatches(this.matches);
          },
          /**
           * Fixes text selection: adds additional div where mouse was clicked.
           * This reduces flickering of the content if mouse slowly dragged down/up.
           * @private
           */
          _bindMouse: function TextLayerBuilder_bindMouse() {
            var div = this.textLayerDiv;
            var self = this;
            var expandDivsTimer = null;
            div.addEventListener('mousedown', function (e) {
              if (self.enhanceTextSelection && self.textLayerRenderTask) {
                self.textLayerRenderTask.expandTextDivs(true);
                return;
              }
              var end = div.querySelector('.endOfContent');
              if (!end) {
                return;
              }
              end.classList.add('active');
            });
            div.addEventListener('mouseup', function (e) {
              if (self.enhanceTextSelection && self.textLayerRenderTask) {
                self.textLayerRenderTask.expandTextDivs(false);
                return;
              }
              var end = div.querySelector('.endOfContent');
              if (!end) {
                return;
              }
              end.classList.remove('active');
            });
          }
        };
        return TextLayerBuilder;
      }();
      /**
       * @constructor
       * @implements IPDFTextLayerFactory
       */
      function DefaultTextLayerFactory() {
      }
      DefaultTextLayerFactory.prototype = {
        /**
         * @param {HTMLDivElement} textLayerDiv
         * @param {number} pageIndex
         * @param {PageViewport} viewport
         * @param {boolean} enhanceTextSelection
         * @returns {TextLayerBuilder}
         */
        createTextLayerBuilder: function (textLayerDiv, pageIndex, viewport, enhanceTextSelection) {
          return new TextLayerBuilder({
            textLayerDiv: textLayerDiv,
            pageIndex: pageIndex,
            viewport: viewport,
            enhanceTextSelection: enhanceTextSelection
          });
        }
      };
      exports.TextLayerBuilder = TextLayerBuilder;
      exports.DefaultTextLayerFactory = DefaultTextLayerFactory;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebAnnotationLayerBuilder = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFLinkService, root.pdfjsWebPDFJS);
    }(this, function (exports, uiUtils, pdfLinkService, pdfjsLib) {
      var mozL10n = uiUtils.mozL10n;
      var SimpleLinkService = pdfLinkService.SimpleLinkService;
      /**
       * @typedef {Object} AnnotationLayerBuilderOptions
       * @property {HTMLDivElement} pageDiv
       * @property {PDFPage} pdfPage
       * @property {boolean} renderInteractiveForms
       * @property {IPDFLinkService} linkService
       * @property {DownloadManager} downloadManager
       */
      /**
       * @class
       */
      var AnnotationLayerBuilder = function AnnotationLayerBuilderClosure() {
        /**
         * @param {AnnotationLayerBuilderOptions} options
         * @constructs AnnotationLayerBuilder
         */
        function AnnotationLayerBuilder(options) {
          this.pageDiv = options.pageDiv;
          this.pdfPage = options.pdfPage;
          this.renderInteractiveForms = options.renderInteractiveForms;
          this.linkService = options.linkService;
          this.downloadManager = options.downloadManager;
          this.div = null;
        }
        AnnotationLayerBuilder.prototype = /** @lends AnnotationLayerBuilder.prototype */
        {
          /**
           * @param {PageViewport} viewport
           * @param {string} intent (default value is 'display')
           */
          render: function AnnotationLayerBuilder_render(viewport, intent) {
            var self = this;
            var parameters = { intent: intent === undefined ? 'display' : intent };
            this.pdfPage.getAnnotations(parameters).then(function (annotations) {
              viewport = viewport.clone({ dontFlip: true });
              parameters = {
                viewport: viewport,
                div: self.div,
                annotations: annotations,
                page: self.pdfPage,
                renderInteractiveForms: self.renderInteractiveForms,
                linkService: self.linkService,
                downloadManager: self.downloadManager
              };
              if (self.div) {
                // If an annotationLayer already exists, refresh its children's
                // transformation matrices.
                pdfjsLib.AnnotationLayer.update(parameters);
              } else {
                // Create an annotation layer div and render the annotations
                // if there is at least one annotation.
                if (annotations.length === 0) {
                  return;
                }
                self.div = document.createElement('div');
                self.div.className = 'annotationLayer';
                self.pageDiv.appendChild(self.div);
                parameters.div = self.div;
                pdfjsLib.AnnotationLayer.render(parameters);
                if (typeof mozL10n !== 'undefined') {
                  mozL10n.translate(self.div);
                }
              }
            });
          },
          hide: function AnnotationLayerBuilder_hide() {
            if (!this.div) {
              return;
            }
            this.div.setAttribute('hidden', 'true');
          }
        };
        return AnnotationLayerBuilder;
      }();
      /**
       * @constructor
       * @implements IPDFAnnotationLayerFactory
       */
      function DefaultAnnotationLayerFactory() {
      }
      DefaultAnnotationLayerFactory.prototype = {
        /**
         * @param {HTMLDivElement} pageDiv
         * @param {PDFPage} pdfPage
         * @param {boolean} renderInteractiveForms
         * @returns {AnnotationLayerBuilder}
         */
        createAnnotationLayerBuilder: function (pageDiv, pdfPage, renderInteractiveForms) {
          return new AnnotationLayerBuilder({
            pageDiv: pageDiv,
            pdfPage: pdfPage,
            renderInteractiveForms: renderInteractiveForms,
            linkService: new SimpleLinkService()
          });
        }
      };
      exports.AnnotationLayerBuilder = AnnotationLayerBuilder;
      exports.DefaultAnnotationLayerFactory = DefaultAnnotationLayerFactory;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebPDFViewer = {}, root.pdfjsWebUIUtils, root.pdfjsWebPDFPageView, root.pdfjsWebPDFRenderingQueue, root.pdfjsWebTextLayerBuilder, root.pdfjsWebAnnotationLayerBuilder, root.pdfjsWebPDFLinkService, root.pdfjsWebDOMEvents, root.pdfjsWebPDFJS);
    }(this, function (exports, uiUtils, pdfPageView, pdfRenderingQueue, textLayerBuilder, annotationLayerBuilder, pdfLinkService, domEvents, pdfjsLib) {
      var UNKNOWN_SCALE = uiUtils.UNKNOWN_SCALE;
      var SCROLLBAR_PADDING = uiUtils.SCROLLBAR_PADDING;
      var VERTICAL_PADDING = uiUtils.VERTICAL_PADDING;
      var MAX_AUTO_SCALE = uiUtils.MAX_AUTO_SCALE;
      var CSS_UNITS = uiUtils.CSS_UNITS;
      var DEFAULT_SCALE = uiUtils.DEFAULT_SCALE;
      var DEFAULT_SCALE_VALUE = uiUtils.DEFAULT_SCALE_VALUE;
      var scrollIntoView = uiUtils.scrollIntoView;
      var watchScroll = uiUtils.watchScroll;
      var getVisibleElements = uiUtils.getVisibleElements;
      var PDFPageView = pdfPageView.PDFPageView;
      var RenderingStates = pdfRenderingQueue.RenderingStates;
      var PDFRenderingQueue = pdfRenderingQueue.PDFRenderingQueue;
      var TextLayerBuilder = textLayerBuilder.TextLayerBuilder;
      var AnnotationLayerBuilder = annotationLayerBuilder.AnnotationLayerBuilder;
      var SimpleLinkService = pdfLinkService.SimpleLinkService;
      var PresentationModeState = {
        UNKNOWN: 0,
        NORMAL: 1,
        CHANGING: 2,
        FULLSCREEN: 3
      };
      var DEFAULT_CACHE_SIZE = 10;
      /**
       * @typedef {Object} PDFViewerOptions
       * @property {HTMLDivElement} container - The container for the viewer element.
       * @property {HTMLDivElement} viewer - (optional) The viewer element.
       * @property {EventBus} eventBus - The application event bus.
       * @property {IPDFLinkService} linkService - The navigation/linking service.
       * @property {DownloadManager} downloadManager - (optional) The download
       *   manager component.
       * @property {PDFRenderingQueue} renderingQueue - (optional) The rendering
       *   queue object.
       * @property {boolean} removePageBorders - (optional) Removes the border shadow
       *   around the pages. The default is false.
       * @property {boolean} enhanceTextSelection - (optional) Enables the improved
       *   text selection behaviour. The default is `false`.
       * @property {boolean} renderInteractiveForms - (optional) Enables rendering of
       *   interactive form elements. The default is `false`.
       */
      /**
       * Simple viewer control to display PDF content/pages.
       * @class
       * @implements {IRenderableView}
       */
      var PDFViewer = function pdfViewer() {
        function PDFPageViewBuffer(size) {
          var data = [];
          this.push = function cachePush(view) {
            var i = data.indexOf(view);
            if (i >= 0) {
              data.splice(i, 1);
            }
            data.push(view);
            if (data.length > size) {
              data.shift().destroy();
            }
          };
          this.resize = function (newSize) {
            size = newSize;
            while (data.length > size) {
              data.shift().destroy();
            }
          };
        }
        function isSameScale(oldScale, newScale) {
          if (newScale === oldScale) {
            return true;
          }
          if (Math.abs(newScale - oldScale) < 1e-15) {
            // Prevent unnecessary re-rendering of all pages when the scale
            // changes only because of limited numerical precision.
            return true;
          }
          return false;
        }
        /**
         * @constructs PDFViewer
         * @param {PDFViewerOptions} options
         */
        function PDFViewer(options) {
          this.container = options.container;
          this.viewer = options.viewer || options.container.firstElementChild;
          this.eventBus = options.eventBus || domEvents.getGlobalEventBus();
          this.linkService = options.linkService || new SimpleLinkService();
          this.downloadManager = options.downloadManager || null;
          this.removePageBorders = options.removePageBorders || false;
          this.enhanceTextSelection = options.enhanceTextSelection || false;
          this.renderInteractiveForms = options.renderInteractiveForms || false;
          this.defaultRenderingQueue = !options.renderingQueue;
          if (this.defaultRenderingQueue) {
            // Custom rendering queue is not specified, using default one
            this.renderingQueue = new PDFRenderingQueue();
            this.renderingQueue.setViewer(this);
          } else {
            this.renderingQueue = options.renderingQueue;
          }
          this.scroll = watchScroll(this.container, this._scrollUpdate.bind(this));
          this.presentationModeState = PresentationModeState.UNKNOWN;
          this._resetView();
          if (this.removePageBorders) {
            this.viewer.classList.add('removePageBorders');
          }
        }
        PDFViewer.prototype = /** @lends PDFViewer.prototype */
        {
          get pagesCount() {
            return this._pages.length;
          },
          getPageView: function (index) {
            return this._pages[index];
          },
          /**
           * @returns {boolean} true if all {PDFPageView} objects are initialized.
           */
          get pageViewsReady() {
            return this._pageViewsReady;
          },
          /**
           * @returns {number}
           */
          get currentPageNumber() {
            return this._currentPageNumber;
          },
          /**
           * @param {number} val - The page number.
           */
          set currentPageNumber(val) {
            if ((val | 0) !== val) {
              // Ensure that `val` is an integer.
              throw new Error('Invalid page number.');
            }
            if (!this.pdfDocument) {
              this._currentPageNumber = val;
              return;
            }
            // The intent can be to just reset a scroll position and/or scale.
            this._setCurrentPageNumber(val, /* resetCurrentPageView = */
            true);
          },
          /**
           * @private
           */
          _setCurrentPageNumber: function PDFViewer_setCurrentPageNumber(val, resetCurrentPageView) {
            if (this._currentPageNumber === val) {
              if (resetCurrentPageView) {
                this._resetCurrentPageView();
              }
              return;
            }
            if (!(0 < val && val <= this.pagesCount)) {
              console.error('PDFViewer_setCurrentPageNumber: "' + val + '" is out of bounds.');
              return;
            }
            var arg = {
              source: this,
              pageNumber: val,
              pageLabel: this._pageLabels && this._pageLabels[val - 1]
            };
            this._currentPageNumber = val;
            this.eventBus.dispatch('pagechanging', arg);
            this.eventBus.dispatch('pagechange', arg);
            if (resetCurrentPageView) {
              this._resetCurrentPageView();
            }
          },
          /**
           * @returns {string|null} Returns the current page label,
           *                        or `null` if no page labels exist.
           */
          get currentPageLabel() {
            return this._pageLabels && this._pageLabels[this._currentPageNumber - 1];
          },
          /**
           * @param {string} val - The page label.
           */
          set currentPageLabel(val) {
            var pageNumber = val | 0;
            // Fallback page number.
            if (this._pageLabels) {
              var i = this._pageLabels.indexOf(val);
              if (i >= 0) {
                pageNumber = i + 1;
              }
            }
            this.currentPageNumber = pageNumber;
          },
          /**
           * @returns {number}
           */
          get currentScale() {
            return this._currentScale !== UNKNOWN_SCALE ? this._currentScale : DEFAULT_SCALE;
          },
          /**
           * @param {number} val - Scale of the pages in percents.
           */
          set currentScale(val) {
            if (isNaN(val)) {
              throw new Error('Invalid numeric scale');
            }
            if (!this.pdfDocument) {
              this._currentScale = val;
              this._currentScaleValue = val !== UNKNOWN_SCALE ? val.toString() : null;
              return;
            }
            this._setScale(val, false);
          },
          /**
           * @returns {string}
           */
          get currentScaleValue() {
            return this._currentScaleValue;
          },
          /**
           * @param val - The scale of the pages (in percent or predefined value).
           */
          set currentScaleValue(val) {
            if (!this.pdfDocument) {
              this._currentScale = isNaN(val) ? UNKNOWN_SCALE : val;
              this._currentScaleValue = val.toString();
              return;
            }
            this._setScale(val, false);
          },
          /**
           * @returns {number}
           */
          get pagesRotation() {
            return this._pagesRotation;
          },
          /**
           * @param {number} rotation - The rotation of the pages (0, 90, 180, 270).
           */
          set pagesRotation(rotation) {
            if (!(typeof rotation === 'number' && rotation % 90 === 0)) {
              throw new Error('Invalid pages rotation angle.');
            }
            this._pagesRotation = rotation;
            if (!this.pdfDocument) {
              return;
            }
            for (var i = 0, l = this._pages.length; i < l; i++) {
              var pageView = this._pages[i];
              pageView.update(pageView.scale, rotation);
            }
            this._setScale(this._currentScaleValue, true);
            if (this.defaultRenderingQueue) {
              this.update();
            }
          },
          /**
           * @param pdfDocument {PDFDocument}
           */
          setDocument: function (pdfDocument) {
            if (this.pdfDocument) {
              this._cancelRendering();
              this._resetView();
            }
            this.pdfDocument = pdfDocument;
            if (!pdfDocument) {
              return;
            }
            var pagesCount = pdfDocument.numPages;
            var self = this;
            var resolvePagesPromise;
            var pagesPromise = new Promise(function (resolve) {
              resolvePagesPromise = resolve;
            });
            this.pagesPromise = pagesPromise;
            pagesPromise.then(function () {
              self._pageViewsReady = true;
              self.eventBus.dispatch('pagesloaded', {
                source: self,
                pagesCount: pagesCount
              });
            });
            var isOnePageRenderedResolved = false;
            var resolveOnePageRendered = null;
            var onePageRendered = new Promise(function (resolve) {
              resolveOnePageRendered = resolve;
            });
            this.onePageRendered = onePageRendered;
            var bindOnAfterAndBeforeDraw = function (pageView) {
              pageView.onBeforeDraw = function pdfViewLoadOnBeforeDraw() {
                // Add the page to the buffer at the start of drawing. That way it can
                // be evicted from the buffer and destroyed even if we pause its
                // rendering.
                self._buffer.push(this);
              };
              pageView.onAfterDraw = function pdfViewLoadOnAfterDraw() {
                if (!isOnePageRenderedResolved) {
                  isOnePageRenderedResolved = true;
                  resolveOnePageRendered();
                }
              };
            };
            var firstPagePromise = pdfDocument.getPage(1);
            this.firstPagePromise = firstPagePromise;
            // Fetch a single page so we can get a viewport that will be the default
            // viewport for all pages
            return firstPagePromise.then(function (pdfPage) {
              var scale = this.currentScale;
              var viewport = pdfPage.getViewport(scale * CSS_UNITS);
              for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
                var textLayerFactory = null;
                if (!pdfjsLib.PDFJS.disableTextLayer) {
                  textLayerFactory = this;
                }
                var pageView = new PDFPageView({
                  container: this.viewer,
                  eventBus: this.eventBus,
                  id: pageNum,
                  scale: scale,
                  defaultViewport: viewport.clone(),
                  renderingQueue: this.renderingQueue,
                  textLayerFactory: textLayerFactory,
                  annotationLayerFactory: this,
                  enhanceTextSelection: this.enhanceTextSelection,
                  renderInteractiveForms: this.renderInteractiveForms
                });
                bindOnAfterAndBeforeDraw(pageView);
                this._pages.push(pageView);
              }
              var linkService = this.linkService;
              // Fetch all the pages since the viewport is needed before printing
              // starts to create the correct size canvas. Wait until one page is
              // rendered so we don't tie up too many resources early on.
              onePageRendered.then(function () {
                if (!pdfjsLib.PDFJS.disableAutoFetch) {
                  var getPagesLeft = pagesCount;
                  for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
                    pdfDocument.getPage(pageNum).then(function (pageNum, pdfPage) {
                      var pageView = self._pages[pageNum - 1];
                      if (!pageView.pdfPage) {
                        pageView.setPdfPage(pdfPage);
                      }
                      linkService.cachePageRef(pageNum, pdfPage.ref);
                      getPagesLeft--;
                      if (!getPagesLeft) {
                        resolvePagesPromise();
                      }
                    }.bind(null, pageNum));
                  }
                } else {
                  // XXX: Printing is semi-broken with auto fetch disabled.
                  resolvePagesPromise();
                }
              });
              self.eventBus.dispatch('pagesinit', { source: self });
              if (this.defaultRenderingQueue) {
                this.update();
              }
              if (this.findController) {
                this.findController.resolveFirstPage();
              }
            }.bind(this));
          },
          /**
           * @param {Array|null} labels
           */
          setPageLabels: function PDFViewer_setPageLabels(labels) {
            if (!this.pdfDocument) {
              return;
            }
            if (!labels) {
              this._pageLabels = null;
            } else if (!(labels instanceof Array && this.pdfDocument.numPages === labels.length)) {
              this._pageLabels = null;
              console.error('PDFViewer_setPageLabels: Invalid page labels.');
            } else {
              this._pageLabels = labels;
            }
            // Update all the `PDFPageView` instances.
            for (var i = 0, ii = this._pages.length; i < ii; i++) {
              var pageView = this._pages[i];
              var label = this._pageLabels && this._pageLabels[i];
              pageView.setPageLabel(label);
            }
          },
          _resetView: function () {
            this._pages = [];
            this._currentPageNumber = 1;
            this._currentScale = UNKNOWN_SCALE;
            this._currentScaleValue = null;
            this._pageLabels = null;
            this._buffer = new PDFPageViewBuffer(DEFAULT_CACHE_SIZE);
            this._location = null;
            this._pagesRotation = 0;
            this._pagesRequests = [];
            this._pageViewsReady = false;
            // Remove the pages from the DOM.
            this.viewer.textContent = '';
          },
          _scrollUpdate: function PDFViewer_scrollUpdate() {
            if (this.pagesCount === 0) {
              return;
            }
            this.update();
            for (var i = 0, ii = this._pages.length; i < ii; i++) {
              this._pages[i].updatePosition();
            }
          },
          _setScaleDispatchEvent: function pdfViewer_setScaleDispatchEvent(newScale, newValue, preset) {
            var arg = {
              source: this,
              scale: newScale,
              presetValue: preset ? newValue : undefined
            };
            this.eventBus.dispatch('scalechanging', arg);
            this.eventBus.dispatch('scalechange', arg);
          },
          _setScaleUpdatePages: function pdfViewer_setScaleUpdatePages(newScale, newValue, noScroll, preset) {
            this._currentScaleValue = newValue.toString();
            if (isSameScale(this._currentScale, newScale)) {
              if (preset) {
                this._setScaleDispatchEvent(newScale, newValue, true);
              }
              return;
            }
            for (var i = 0, ii = this._pages.length; i < ii; i++) {
              this._pages[i].update(newScale);
            }
            this._currentScale = newScale;
            if (!noScroll) {
              var page = this._currentPageNumber, dest;
              if (this._location && !pdfjsLib.PDFJS.ignoreCurrentPositionOnZoom && !(this.isInPresentationMode || this.isChangingPresentationMode)) {
                page = this._location.pageNumber;
                dest = [
                  null,
                  { name: 'XYZ' },
                  this._location.left,
                  this._location.top,
                  null
                ];
              }
              this.scrollPageIntoView({
                pageNumber: page,
                destArray: dest,
                allowNegativeOffset: true
              });
            }
            this._setScaleDispatchEvent(newScale, newValue, preset);
            if (this.defaultRenderingQueue) {
              this.update();
            }
          },
          _setScale: function PDFViewer_setScale(value, noScroll) {
            var scale = parseFloat(value);
            if (scale > 0) {
              this._setScaleUpdatePages(scale, value, noScroll, false);
            } else {
              var currentPage = this._pages[this._currentPageNumber - 1];
              if (!currentPage) {
                return;
              }
              var hPadding = this.isInPresentationMode || this.removePageBorders ? 0 : SCROLLBAR_PADDING;
              var vPadding = this.isInPresentationMode || this.removePageBorders ? 0 : VERTICAL_PADDING;
              var pageWidthScale = (this.container.clientWidth - hPadding) / currentPage.width * currentPage.scale;
              var pageHeightScale = (this.container.clientHeight - vPadding) / currentPage.height * currentPage.scale;
              switch (value) {
              case 'page-actual':
                scale = 1;
                break;
              case 'page-width':
                scale = pageWidthScale;
                break;
              case 'page-height':
                scale = pageHeightScale;
                break;
              case 'page-fit':
                scale = Math.min(pageWidthScale, pageHeightScale);
                break;
              case 'auto':
                var isLandscape = currentPage.width > currentPage.height;
                // For pages in landscape mode, fit the page height to the viewer
                // *unless* the page would thus become too wide to fit horizontally.
                var horizontalScale = isLandscape ? Math.min(pageHeightScale, pageWidthScale) : pageWidthScale;
                scale = Math.min(MAX_AUTO_SCALE, horizontalScale);
                break;
              default:
                console.error('PDFViewer_setScale: "' + value + '" is an unknown zoom value.');
                return;
              }
              this._setScaleUpdatePages(scale, value, noScroll, true);
            }
          },
          /**
           * Refreshes page view: scrolls to the current page and updates the scale.
           * @private
           */
          _resetCurrentPageView: function () {
            if (this.isInPresentationMode) {
              // Fixes the case when PDF has different page sizes.
              this._setScale(this._currentScaleValue, true);
            }
            var pageView = this._pages[this._currentPageNumber - 1];
            scrollIntoView(pageView.div);
          },
          /**
           * @typedef ScrollPageIntoViewParameters
           * @property {number} pageNumber - The page number.
           * @property {Array} destArray - (optional) The original PDF destination
           *   array, in the format: <page-ref> </XYZ|/FitXXX> <args..>
           * @property {boolean} allowNegativeOffset - (optional) Allow negative page
           *   offsets. The default value is `false`.
           */
          /**
           * Scrolls page into view.
           * @param {ScrollPageIntoViewParameters} params
           */
          scrollPageIntoView: function PDFViewer_scrollPageIntoView(params) {
            if (!this.pdfDocument) {
              return;
            }
            var pageNumber = params.pageNumber || 0;
            var dest = params.destArray || null;
            var allowNegativeOffset = params.allowNegativeOffset || false;
            if (this.isInPresentationMode || !dest) {
              this._setCurrentPageNumber(pageNumber, /* resetCurrentPageView */
              true);
              return;
            }
            var pageView = this._pages[pageNumber - 1];
            if (!pageView) {
              console.error('PDFViewer_scrollPageIntoView: ' + 'Invalid "pageNumber" parameter.');
              return;
            }
            var x = 0, y = 0;
            var width = 0, height = 0, widthScale, heightScale;
            var changeOrientation = pageView.rotation % 180 === 0 ? false : true;
            var pageWidth = (changeOrientation ? pageView.height : pageView.width) / pageView.scale / CSS_UNITS;
            var pageHeight = (changeOrientation ? pageView.width : pageView.height) / pageView.scale / CSS_UNITS;
            var scale = 0;
            switch (dest[1].name) {
            case 'XYZ':
              x = dest[2];
              y = dest[3];
              scale = dest[4];
              // If x and/or y coordinates are not supplied, default to
              // _top_ left of the page (not the obvious bottom left,
              // since aligning the bottom of the intended page with the
              // top of the window is rarely helpful).
              x = x !== null ? x : 0;
              y = y !== null ? y : pageHeight;
              break;
            case 'Fit':
            case 'FitB':
              scale = 'page-fit';
              break;
            case 'FitH':
            case 'FitBH':
              y = dest[2];
              scale = 'page-width';
              // According to the PDF spec, section 12.3.2.2, a `null` value in the
              // parameter should maintain the position relative to the new page.
              if (y === null && this._location) {
                x = this._location.left;
                y = this._location.top;
              }
              break;
            case 'FitV':
            case 'FitBV':
              x = dest[2];
              width = pageWidth;
              height = pageHeight;
              scale = 'page-height';
              break;
            case 'FitR':
              x = dest[2];
              y = dest[3];
              width = dest[4] - x;
              height = dest[5] - y;
              var hPadding = this.removePageBorders ? 0 : SCROLLBAR_PADDING;
              var vPadding = this.removePageBorders ? 0 : VERTICAL_PADDING;
              widthScale = (this.container.clientWidth - hPadding) / width / CSS_UNITS;
              heightScale = (this.container.clientHeight - vPadding) / height / CSS_UNITS;
              scale = Math.min(Math.abs(widthScale), Math.abs(heightScale));
              break;
            default:
              console.error('PDFViewer_scrollPageIntoView: \'' + dest[1].name + '\' is not a valid destination type.');
              return;
            }
            if (scale && scale !== this._currentScale) {
              this.currentScaleValue = scale;
            } else if (this._currentScale === UNKNOWN_SCALE) {
              this.currentScaleValue = DEFAULT_SCALE_VALUE;
            }
            if (scale === 'page-fit' && !dest[4]) {
              scrollIntoView(pageView.div);
              return;
            }
            var boundingRect = [
              pageView.viewport.convertToViewportPoint(x, y),
              pageView.viewport.convertToViewportPoint(x + width, y + height)
            ];
            var left = Math.min(boundingRect[0][0], boundingRect[1][0]);
            var top = Math.min(boundingRect[0][1], boundingRect[1][1]);
            if (!allowNegativeOffset) {
              // Some bad PDF generators will create destinations with e.g. top values
              // that exceeds the page height. Ensure that offsets are not negative,
              // to prevent a previous page from becoming visible (fixes bug 874482).
              left = Math.max(left, 0);
              top = Math.max(top, 0);
            }
            scrollIntoView(pageView.div, {
              left: left,
              top: top
            });
          },
          _updateLocation: function (firstPage) {
            var currentScale = this._currentScale;
            var currentScaleValue = this._currentScaleValue;
            var normalizedScaleValue = parseFloat(currentScaleValue) === currentScale ? Math.round(currentScale * 10000) / 100 : currentScaleValue;
            var pageNumber = firstPage.id;
            var pdfOpenParams = '#page=' + pageNumber;
            pdfOpenParams += '&zoom=' + normalizedScaleValue;
            var currentPageView = this._pages[pageNumber - 1];
            var container = this.container;
            var topLeft = currentPageView.getPagePoint(container.scrollLeft - firstPage.x, container.scrollTop - firstPage.y);
            var intLeft = Math.round(topLeft[0]);
            var intTop = Math.round(topLeft[1]);
            pdfOpenParams += ',' + intLeft + ',' + intTop;
            this._location = {
              pageNumber: pageNumber,
              scale: normalizedScaleValue,
              top: intTop,
              left: intLeft,
              pdfOpenParams: pdfOpenParams
            };
          },
          update: function PDFViewer_update() {
            var visible = this._getVisiblePages();
            var visiblePages = visible.views;
            if (visiblePages.length === 0) {
              return;
            }
            var suggestedCacheSize = Math.max(DEFAULT_CACHE_SIZE, 2 * visiblePages.length + 1);
            this._buffer.resize(suggestedCacheSize);
            this.renderingQueue.renderHighestPriority(visible);
            var currentId = this._currentPageNumber;
            var firstPage = visible.first;
            for (var i = 0, ii = visiblePages.length, stillFullyVisible = false; i < ii; ++i) {
              var page = visiblePages[i];
              if (page.percent < 100) {
                break;
              }
              if (page.id === currentId) {
                stillFullyVisible = true;
                break;
              }
            }
            if (!stillFullyVisible) {
              currentId = visiblePages[0].id;
            }
            if (!this.isInPresentationMode) {
              this._setCurrentPageNumber(currentId);
            }
            this._updateLocation(firstPage);
            this.eventBus.dispatch('updateviewarea', {
              source: this,
              location: this._location
            });
          },
          containsElement: function (element) {
            return this.container.contains(element);
          },
          focus: function () {
            this.container.focus();
          },
          get isInPresentationMode() {
            return this.presentationModeState === PresentationModeState.FULLSCREEN;
          },
          get isChangingPresentationMode() {
            return this.presentationModeState === PresentationModeState.CHANGING;
          },
          get isHorizontalScrollbarEnabled() {
            return this.isInPresentationMode ? false : this.container.scrollWidth > this.container.clientWidth;
          },
          _getVisiblePages: function () {
            if (!this.isInPresentationMode) {
              return getVisibleElements(this.container, this._pages, true);
            } else {
              // The algorithm in getVisibleElements doesn't work in all browsers and
              // configurations when presentation mode is active.
              var visible = [];
              var currentPage = this._pages[this._currentPageNumber - 1];
              visible.push({
                id: currentPage.id,
                view: currentPage
              });
              return {
                first: currentPage,
                last: currentPage,
                views: visible
              };
            }
          },
          cleanup: function () {
            for (var i = 0, ii = this._pages.length; i < ii; i++) {
              if (this._pages[i] && this._pages[i].renderingState !== RenderingStates.FINISHED) {
                this._pages[i].reset();
              }
            }
          },
          /**
           * @private
           */
          _cancelRendering: function PDFViewer_cancelRendering() {
            for (var i = 0, ii = this._pages.length; i < ii; i++) {
              if (this._pages[i]) {
                this._pages[i].cancelRendering();
              }
            }
          },
          /**
           * @param {PDFPageView} pageView
           * @returns {PDFPage}
           * @private
           */
          _ensurePdfPageLoaded: function (pageView) {
            if (pageView.pdfPage) {
              return Promise.resolve(pageView.pdfPage);
            }
            var pageNumber = pageView.id;
            if (this._pagesRequests[pageNumber]) {
              return this._pagesRequests[pageNumber];
            }
            var promise = this.pdfDocument.getPage(pageNumber).then(function (pdfPage) {
              pageView.setPdfPage(pdfPage);
              this._pagesRequests[pageNumber] = null;
              return pdfPage;
            }.bind(this));
            this._pagesRequests[pageNumber] = promise;
            return promise;
          },
          forceRendering: function (currentlyVisiblePages) {
            var visiblePages = currentlyVisiblePages || this._getVisiblePages();
            var pageView = this.renderingQueue.getHighestPriority(visiblePages, this._pages, this.scroll.down);
            if (pageView) {
              this._ensurePdfPageLoaded(pageView).then(function () {
                this.renderingQueue.renderView(pageView);
              }.bind(this));
              return true;
            }
            return false;
          },
          getPageTextContent: function (pageIndex) {
            return this.pdfDocument.getPage(pageIndex + 1).then(function (page) {
              return page.getTextContent({ normalizeWhitespace: true });
            });
          },
          /**
           * @param {HTMLDivElement} textLayerDiv
           * @param {number} pageIndex
           * @param {PageViewport} viewport
           * @returns {TextLayerBuilder}
           */
          createTextLayerBuilder: function (textLayerDiv, pageIndex, viewport, enhanceTextSelection) {
            return new TextLayerBuilder({
              textLayerDiv: textLayerDiv,
              eventBus: this.eventBus,
              pageIndex: pageIndex,
              viewport: viewport,
              findController: this.isInPresentationMode ? null : this.findController,
              enhanceTextSelection: this.isInPresentationMode ? false : enhanceTextSelection
            });
          },
          /**
           * @param {HTMLDivElement} pageDiv
           * @param {PDFPage} pdfPage
           * @param {boolean} renderInteractiveForms
           * @returns {AnnotationLayerBuilder}
           */
          createAnnotationLayerBuilder: function (pageDiv, pdfPage, renderInteractiveForms) {
            return new AnnotationLayerBuilder({
              pageDiv: pageDiv,
              pdfPage: pdfPage,
              renderInteractiveForms: renderInteractiveForms,
              linkService: this.linkService,
              downloadManager: this.downloadManager
            });
          },
          setFindController: function (findController) {
            this.findController = findController;
          },
          /**
           * Returns sizes of the pages.
           * @returns {Array} Array of objects with width/height fields.
           */
          getPagesOverview: function () {
            return this._pages.map(function (pageView) {
              var viewport = pageView.pdfPage.getViewport(1);
              return {
                width: viewport.width,
                height: viewport.height
              };
            });
          }
        };
        return PDFViewer;
      }();
      exports.PresentationModeState = PresentationModeState;
      exports.PDFViewer = PDFViewer;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebApp = {}, root.pdfjsWebUIUtils, root.pdfjsWebDownloadManager, root.pdfjsWebPDFHistory, root.pdfjsWebPreferences, root.pdfjsWebPDFSidebar, root.pdfjsWebViewHistory, root.pdfjsWebPDFThumbnailViewer, root.pdfjsWebSecondaryToolbar, root.pdfjsWebPasswordPrompt, root.pdfjsWebPDFPresentationMode, root.pdfjsWebPDFDocumentProperties, root.pdfjsWebHandTool, root.pdfjsWebPDFViewer, root.pdfjsWebPDFRenderingQueue, root.pdfjsWebPDFLinkService, root.pdfjsWebPDFOutlineViewer, root.pdfjsWebOverlayManager, root.pdfjsWebPDFAttachmentViewer, root.pdfjsWebPDFFindController, root.pdfjsWebPDFFindBar, root.pdfjsWebDOMEvents, root.pdfjsWebPDFJS);
    }(this, function (exports, uiUtilsLib, downloadManagerLib, pdfHistoryLib, preferencesLib, pdfSidebarLib, viewHistoryLib, pdfThumbnailViewerLib, secondaryToolbarLib, passwordPromptLib, pdfPresentationModeLib, pdfDocumentPropertiesLib, handToolLib, pdfViewerLib, pdfRenderingQueueLib, pdfLinkServiceLib, pdfOutlineViewerLib, overlayManagerLib, pdfAttachmentViewerLib, pdfFindControllerLib, pdfFindBarLib, domEventsLib, pdfjsLib) {
      var UNKNOWN_SCALE = uiUtilsLib.UNKNOWN_SCALE;
      var DEFAULT_SCALE_VALUE = uiUtilsLib.DEFAULT_SCALE_VALUE;
      var ProgressBar = uiUtilsLib.ProgressBar;
      var getPDFFileNameFromURL = uiUtilsLib.getPDFFileNameFromURL;
      var noContextMenuHandler = uiUtilsLib.noContextMenuHandler;
      var mozL10n = uiUtilsLib.mozL10n;
      var parseQueryString = uiUtilsLib.parseQueryString;
      var PDFHistory = pdfHistoryLib.PDFHistory;
      var Preferences = preferencesLib.Preferences;
      var SidebarView = pdfSidebarLib.SidebarView;
      var PDFSidebar = pdfSidebarLib.PDFSidebar;
      var ViewHistory = viewHistoryLib.ViewHistory;
      var PDFThumbnailViewer = pdfThumbnailViewerLib.PDFThumbnailViewer;
      var SecondaryToolbar = secondaryToolbarLib.SecondaryToolbar;
      var PasswordPrompt = passwordPromptLib.PasswordPrompt;
      var PDFPresentationMode = pdfPresentationModeLib.PDFPresentationMode;
      var PDFDocumentProperties = pdfDocumentPropertiesLib.PDFDocumentProperties;
      var HandTool = handToolLib.HandTool;
      var PresentationModeState = pdfViewerLib.PresentationModeState;
      var PDFViewer = pdfViewerLib.PDFViewer;
      var RenderingStates = pdfRenderingQueueLib.RenderingStates;
      var PDFRenderingQueue = pdfRenderingQueueLib.PDFRenderingQueue;
      var PDFLinkService = pdfLinkServiceLib.PDFLinkService;
      var PDFOutlineViewer = pdfOutlineViewerLib.PDFOutlineViewer;
      var OverlayManager = overlayManagerLib.OverlayManager;
      var PDFAttachmentViewer = pdfAttachmentViewerLib.PDFAttachmentViewer;
      var PDFFindController = pdfFindControllerLib.PDFFindController;
      var PDFFindBar = pdfFindBarLib.PDFFindBar;
      var getGlobalEventBus = domEventsLib.getGlobalEventBus;
      var normalizeWheelEventDelta = uiUtilsLib.normalizeWheelEventDelta;
      var DEFAULT_SCALE_DELTA = 1.1;
      var MIN_SCALE = 0.25;
      var MAX_SCALE = 10.0;
      var SCALE_SELECT_CONTAINER_PADDING = 8;
      var SCALE_SELECT_PADDING = 22;
      var PAGE_NUMBER_LOADING_INDICATOR = 'visiblePageIsLoading';
      var DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT = 5000;
      function configure(PDFJS) {
        PDFJS.imageResourcesPath = './images/';
        PDFJS.workerSrc = '../build/pdf.worker.js';
        PDFJS.cMapUrl = '../web/cmaps/';
        PDFJS.cMapPacked = true;
      }
      var DefaultExernalServices = {
        updateFindControlState: function (data) {
        },
        initPassiveLoading: function (callbacks) {
        },
        fallback: function (data, callback) {
        },
        reportTelemetry: function (data) {
        },
        createDownloadManager: function () {
          return new downloadManagerLib.DownloadManager();
        },
        supportsIntegratedFind: false,
        supportsDocumentFonts: true,
        supportsDocumentColors: true,
        supportedMouseWheelZoomModifierKeys: {
          ctrlKey: true,
          metaKey: true
        }
      };
      var PDFViewerApplication = {
        initialBookmark: document.location.hash.substring(1),
        initialDestination: null,
        initialized: false,
        fellback: false,
        appConfig: null,
        pdfDocument: null,
        pdfLoadingTask: null,
        printService: null,
        /** @type {PDFViewer} */
        pdfViewer: null,
        /** @type {PDFThumbnailViewer} */
        pdfThumbnailViewer: null,
        /** @type {PDFRenderingQueue} */
        pdfRenderingQueue: null,
        /** @type {PDFPresentationMode} */
        pdfPresentationMode: null,
        /** @type {PDFDocumentProperties} */
        pdfDocumentProperties: null,
        /** @type {PDFLinkService} */
        pdfLinkService: null,
        /** @type {PDFHistory} */
        pdfHistory: null,
        /** @type {PDFSidebar} */
        pdfSidebar: null,
        /** @type {PDFOutlineViewer} */
        pdfOutlineViewer: null,
        /** @type {PDFAttachmentViewer} */
        pdfAttachmentViewer: null,
        /** @type {ViewHistory} */
        store: null,
        /** @type {DownloadManager} */
        downloadManager: null,
        /** @type {EventBus} */
        eventBus: null,
        pageRotation: 0,
        isInitialViewSet: false,
        animationStartedPromise: null,
        preferenceSidebarViewOnLoad: SidebarView.NONE,
        preferencePdfBugEnabled: false,
        preferenceShowPreviousViewOnLoad: true,
        preferenceDefaultZoomValue: '',
        preferenceDisablePageLabels: false,
        isViewerEmbedded: window.parent !== window,
        url: '',
        baseUrl: '',
        externalServices: DefaultExernalServices,
        hasPageLabels: false,
        // called once when the document is loaded
        initialize: function pdfViewInitialize(appConfig) {
          configure(pdfjsLib.PDFJS);
          this.appConfig = appConfig;
          var eventBus = appConfig.eventBus || getGlobalEventBus();
          this.eventBus = eventBus;
          this.bindEvents();
          var pdfRenderingQueue = new PDFRenderingQueue();
          pdfRenderingQueue.onIdle = this.cleanup.bind(this);
          this.pdfRenderingQueue = pdfRenderingQueue;
          var pdfLinkService = new PDFLinkService({ eventBus: eventBus });
          this.pdfLinkService = pdfLinkService;
          var downloadManager = this.externalServices.createDownloadManager();
          this.downloadManager = downloadManager;
          var container = appConfig.mainContainer;
          var viewer = appConfig.viewerContainer;
          this.pdfViewer = new PDFViewer({
            container: container,
            viewer: viewer,
            eventBus: eventBus,
            renderingQueue: pdfRenderingQueue,
            linkService: pdfLinkService,
            downloadManager: downloadManager,
            enhanceTextSelection: false,
            renderInteractiveForms: false
          });
          pdfRenderingQueue.setViewer(this.pdfViewer);
          pdfLinkService.setViewer(this.pdfViewer);
          var thumbnailContainer = appConfig.sidebar.thumbnailView;
          this.pdfThumbnailViewer = new PDFThumbnailViewer({
            container: thumbnailContainer,
            renderingQueue: pdfRenderingQueue,
            linkService: pdfLinkService
          });
          pdfRenderingQueue.setThumbnailViewer(this.pdfThumbnailViewer);
          Preferences.initialize();
          this.preferences = Preferences;
          this.pdfHistory = new PDFHistory({
            linkService: pdfLinkService,
            eventBus: this.eventBus
          });
          pdfLinkService.setHistory(this.pdfHistory);
          this.findController = new PDFFindController({ pdfViewer: this.pdfViewer });
          this.findController.onUpdateResultsCount = function (matchCount) {
            if (this.supportsIntegratedFind) {
              return;
            }
            this.findBar.updateResultsCount(matchCount);
          }.bind(this);
          this.findController.onUpdateState = function (state, previous, matchCount) {
            if (this.supportsIntegratedFind) {
              this.externalServices.updateFindControlState({
                result: state,
                findPrevious: previous
              });
            } else {
              this.findBar.updateUIState(state, previous, matchCount);
            }
          }.bind(this);
          this.pdfViewer.setFindController(this.findController);
          // FIXME better PDFFindBar constructor parameters
          var findBarConfig = Object.create(appConfig.findBar);
          findBarConfig.findController = this.findController;
          findBarConfig.eventBus = this.eventBus;
          this.findBar = new PDFFindBar(findBarConfig);
          this.overlayManager = OverlayManager;
          this.handTool = new HandTool({
            container: container,
            eventBus: this.eventBus
          });
          this.pdfDocumentProperties = new PDFDocumentProperties(appConfig.documentProperties);
          this.secondaryToolbar = new SecondaryToolbar(appConfig.secondaryToolbar, container, eventBus);
          if (this.supportsFullscreen) {
            this.pdfPresentationMode = new PDFPresentationMode({
              container: container,
              viewer: viewer,
              pdfViewer: this.pdfViewer,
              eventBus: this.eventBus,
              contextMenuItems: appConfig.fullscreen
            });
          }
          this.passwordPrompt = new PasswordPrompt(appConfig.passwordOverlay);
          this.pdfOutlineViewer = new PDFOutlineViewer({
            container: appConfig.sidebar.outlineView,
            eventBus: this.eventBus,
            linkService: pdfLinkService
          });
          this.pdfAttachmentViewer = new PDFAttachmentViewer({
            container: appConfig.sidebar.attachmentsView,
            eventBus: this.eventBus,
            downloadManager: downloadManager
          });
          // FIXME better PDFSidebar constructor parameters
          var sidebarConfig = Object.create(appConfig.sidebar);
          sidebarConfig.pdfViewer = this.pdfViewer;
          sidebarConfig.pdfThumbnailViewer = this.pdfThumbnailViewer;
          sidebarConfig.pdfOutlineViewer = this.pdfOutlineViewer;
          sidebarConfig.eventBus = this.eventBus;
          this.pdfSidebar = new PDFSidebar(sidebarConfig);
          this.pdfSidebar.onToggled = this.forceRendering.bind(this);
          var self = this;
          var PDFJS = pdfjsLib.PDFJS;
          var initializedPromise = Promise.all([
            Preferences.get('enableWebGL').then(function resolved(value) {
              PDFJS.disableWebGL = !value;
            }),
            Preferences.get('sidebarViewOnLoad').then(function resolved(value) {
              self.preferenceSidebarViewOnLoad = value;
            }),
            Preferences.get('pdfBugEnabled').then(function resolved(value) {
              self.preferencePdfBugEnabled = value;
            }),
            Preferences.get('showPreviousViewOnLoad').then(function resolved(value) {
              self.preferenceShowPreviousViewOnLoad = value;
            }),
            Preferences.get('defaultZoomValue').then(function resolved(value) {
              self.preferenceDefaultZoomValue = value;
            }),
            Preferences.get('enhanceTextSelection').then(function resolved(value) {
              // TODO: Move the initialization and fetching of `Preferences` to occur
              //       before the various viewer components are initialized.
              //
              // This was attempted in: https://github.com/mozilla/pdf.js/pull/7586,
              // but it had to be backed out since it violated implicit assumptions
              // about some viewer components being synchronously available.
              //
              // NOTE: This hack works since the `enhanceTextSelection` option is not
              //       needed until `PDFViewer.setDocument` has been called.
              self.pdfViewer.enhanceTextSelection = value;
            }),
            Preferences.get('disableTextLayer').then(function resolved(value) {
              if (PDFJS.disableTextLayer === true) {
                return;
              }
              PDFJS.disableTextLayer = value;
            }),
            Preferences.get('disableRange').then(function resolved(value) {
              if (PDFJS.disableRange === true) {
                return;
              }
              PDFJS.disableRange = value;
            }),
            Preferences.get('disableStream').then(function resolved(value) {
              if (PDFJS.disableStream === true) {
                return;
              }
              PDFJS.disableStream = value;
            }),
            Preferences.get('disableAutoFetch').then(function resolved(value) {
              PDFJS.disableAutoFetch = value;
            }),
            Preferences.get('disableFontFace').then(function resolved(value) {
              if (PDFJS.disableFontFace === true) {
                return;
              }
              PDFJS.disableFontFace = value;
            }),
            Preferences.get('useOnlyCssZoom').then(function resolved(value) {
              PDFJS.useOnlyCssZoom = value;
            }),
            Preferences.get('externalLinkTarget').then(function resolved(value) {
              if (PDFJS.isExternalLinkTargetSet()) {
                return;
              }
              PDFJS.externalLinkTarget = value;
            }),
            Preferences.get('renderInteractiveForms').then(function resolved(value) {
              // TODO: Like the `enhanceTextSelection` preference, move the
              //       initialization and fetching of `Preferences` to occur
              //       before the various viewer components are initialized.
              self.pdfViewer.renderInteractiveForms = value;
            }),
            Preferences.get('disablePageLabels').then(function resolved(value) {
              self.preferenceDisablePageLabels = value;
            })
          ]).catch(function (reason) {
          });
          return initializedPromise.then(function () {
            if (self.isViewerEmbedded && !PDFJS.isExternalLinkTargetSet()) {
              // Prevent external links from "replacing" the viewer,
              // when it's embedded in e.g. an iframe or an object.
              PDFJS.externalLinkTarget = PDFJS.LinkTarget.TOP;
            }
            self.initialized = true;
          });
        },
        run: function pdfViewRun(config) {
          this.initialize(config).then(webViewerInitialized);
        },
        zoomIn: function pdfViewZoomIn(ticks) {
          var newScale = this.pdfViewer.currentScale;
          do {
            newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2);
            newScale = Math.ceil(newScale * 10) / 10;
            newScale = Math.min(MAX_SCALE, newScale);
          } while (--ticks > 0 && newScale < MAX_SCALE);
          this.pdfViewer.currentScaleValue = newScale;
        },
        zoomOut: function pdfViewZoomOut(ticks) {
          var newScale = this.pdfViewer.currentScale;
          do {
            newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2);
            newScale = Math.floor(newScale * 10) / 10;
            newScale = Math.max(MIN_SCALE, newScale);
          } while (--ticks > 0 && newScale > MIN_SCALE);
          this.pdfViewer.currentScaleValue = newScale;
        },
        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() {
          var support;
          support = document.fullscreenEnabled === true || document.mozFullScreenEnabled === true;
          if (support && pdfjsLib.PDFJS.disableFullscreen === true) {
            support = false;
          }
          return pdfjsLib.shadow(this, 'supportsFullscreen', support);
        },
        get supportsIntegratedFind() {
          return this.externalServices.supportsIntegratedFind;
        },
        get supportsDocumentFonts() {
          return this.externalServices.supportsDocumentFonts;
        },
        get supportsDocumentColors() {
          return this.externalServices.supportsDocumentColors;
        },
        get loadingBar() {
          var bar = new ProgressBar('#loadingBar', {});
          return pdfjsLib.shadow(this, 'loadingBar', bar);
        },
        get supportedMouseWheelZoomModifierKeys() {
          return this.externalServices.supportedMouseWheelZoomModifierKeys;
        },
        initPassiveLoading: function pdfViewInitPassiveLoading() {
          this.externalServices.initPassiveLoading({
            onOpenWithTransport: function (url, length, transport) {
              PDFViewerApplication.open(url, { range: transport });
              if (length) {
                PDFViewerApplication.pdfDocumentProperties.setFileSize(length);
              }
            },
            onOpenWithData: function (data) {
              PDFViewerApplication.open(data);
            },
            onOpenWithURL: function (url, length, originalURL) {
              var file = url, args = null;
              if (length !== undefined) {
                args = { length: length };
              }
              if (originalURL !== undefined) {
                file = {
                  file: url,
                  originalURL: originalURL
                };
              }
              PDFViewerApplication.open(file, args);
            },
            onError: function (e) {
              PDFViewerApplication.error(mozL10n.get('loading_error', null, 'An error occurred while loading the PDF.'), e);
            },
            onProgress: function (loaded, total) {
              PDFViewerApplication.progress(loaded / total);
            }
          });
        },
        setTitleUsingUrl: function pdfViewSetTitleUsingUrl(url) {
          this.url = url;
          this.baseUrl = url.split('#')[0];
          try {
            this.setTitle(decodeURIComponent(pdfjsLib.getFilenameFromUrl(url)) || url);
          } catch (e) {
            // decodeURIComponent may throw URIError,
            // fall back to using the unprocessed url in that case
            this.setTitle(url);
          }
        },
        setTitle: function pdfViewSetTitle(title) {
          if (this.isViewerEmbedded) {
            // Embedded PDF viewers should not be changing their parent page's title.
            return;
          }
          document.title = title;
        },
        /**
         * Closes opened PDF document.
         * @returns {Promise} - Returns the promise, which is resolved when all
         *                      destruction is completed.
         */
        close: function pdfViewClose() {
          var errorWrapper = this.appConfig.errorWrapper.container;
          errorWrapper.setAttribute('hidden', 'true');
          if (!this.pdfLoadingTask) {
            return Promise.resolve();
          }
          var 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, null);
          }
          this.store = null;
          this.isInitialViewSet = false;
          this.hasPageLabels = false;
          this.pdfSidebar.reset();
          this.pdfOutlineViewer.reset();
          this.pdfAttachmentViewer.reset();
          this.findController.reset();
          this.findBar.reset();
          if (typeof PDFBug !== 'undefined') {
            PDFBug.cleanup();
          }
          return promise;
        },
        /**
         * Opens PDF document specified by URL or array with additional arguments.
         * @param {string|TypedArray|ArrayBuffer} file - PDF location or binary data.
         * @param {Object} args - (optional) Additional arguments for the getDocument
         *                        call, e.g. HTTP headers ('httpHeaders') or
         *                        alternative data transport ('range').
         * @returns {Promise} - Returns the promise, which is resolved when document
         *                      is opened.
         */
        open: function pdfViewOpen(file, args) {
          if (this.pdfLoadingTask) {
            // We need to destroy already opened document.
            return this.close().then(function () {
              // Reload the preferences if a document was previously opened.
              Preferences.reload();
              // ... and repeat the open() call.
              return this.open(file, args);
            }.bind(this));
          }
          var parameters = Object.create(null), scale;
          if (typeof file === 'string') {
            // URL
            this.setTitleUsingUrl(file);
            parameters.url = file;
          } else if (file && 'byteLength' in file) {
            // ArrayBuffer
            parameters.data = file;
          } else if (file.url && file.originalUrl) {
            this.setTitleUsingUrl(file.originalUrl);
            parameters.url = file.url;
          }
          parameters.docBaseUrl = this.baseUrl;
          if (args) {
            for (var prop in args) {
              parameters[prop] = args[prop];
            }
            if (args.scale) {
              scale = args.scale;
            }
            if (args.length) {
              this.pdfDocumentProperties.setFileSize(args.length);
            }
          }
          var self = this;
          self.downloadComplete = false;
          var loadingTask = pdfjsLib.getDocument(parameters);
          this.pdfLoadingTask = loadingTask;
          loadingTask.onPassword = function passwordNeeded(updateCallback, reason) {
            self.passwordPrompt.setUpdateCallback(updateCallback, reason);
            self.passwordPrompt.open();
          };
          loadingTask.onProgress = function getDocumentProgress(progressData) {
            self.progress(progressData.loaded / progressData.total);
          };
          // Listen for unsupported features to trigger the fallback UI.
          loadingTask.onUnsupportedFeature = this.fallback.bind(this);
          return loadingTask.promise.then(function getDocumentCallback(pdfDocument) {
            self.load(pdfDocument, scale);
          }, function getDocumentError(exception) {
            var message = exception && exception.message;
            var loadingErrorMessage = mozL10n.get('loading_error', null, 'An error occurred while loading the PDF.');
            if (exception instanceof pdfjsLib.InvalidPDFException) {
              // change error message also for other builds
              loadingErrorMessage = mozL10n.get('invalid_file_error', null, 'Invalid or corrupted PDF file.');
            } else if (exception instanceof pdfjsLib.MissingPDFException) {
              // special message for missing PDF's
              loadingErrorMessage = mozL10n.get('missing_file_error', null, 'Missing PDF file.');
            } else if (exception instanceof pdfjsLib.UnexpectedResponseException) {
              loadingErrorMessage = mozL10n.get('unexpected_response_error', null, 'Unexpected server response.');
            }
            var moreInfo = { message: message };
            self.error(loadingErrorMessage, moreInfo);
            throw new Error(loadingErrorMessage);
          });
        },
        download: function pdfViewDownload() {
          function downloadByUrl() {
            downloadManager.downloadUrl(url, filename);
          }
          var url = this.baseUrl;
          var filename = getPDFFileNameFromURL(url);
          var downloadManager = this.downloadManager;
          downloadManager.onerror = function (err) {
            // This error won't really be helpful because it's likely the
            // fallback won't work either (or is already open).
            PDFViewerApplication.error('PDF failed to download.');
          };
          if (!this.pdfDocument) {
            // the PDF is not ready yet
            downloadByUrl();
            return;
          }
          if (!this.downloadComplete) {
            // the PDF is still downloading
            downloadByUrl();
            return;
          }
          this.pdfDocument.getData().then(function getDataSuccess(data) {
            var blob = pdfjsLib.createBlob(data, 'application/pdf');
            downloadManager.download(blob, url, filename);
          }, downloadByUrl).then(null, downloadByUrl);
        },
        fallback: function pdfViewFallback(featureId) {
          // Only trigger the fallback once so we don't spam the user with messages
          // for one PDF.
          if (this.fellback) {
            return;
          }
          this.fellback = true;
          this.externalServices.fallback({
            featureId: featureId,
            url: this.baseUrl
          }, function response(download) {
            if (!download) {
              return;
            }
            PDFViewerApplication.download();
          });
        },
        /**
         * Show the error box.
         * @param {String} message A message that is human readable.
         * @param {Object} moreInfo (optional) Further information about the error
         *                            that is more technical.  Should have a 'message'
         *                            and optionally a 'stack' property.
         */
        error: function pdfViewError(message, moreInfo) {
          var moreInfoText = mozL10n.get('error_version_info', {
            version: pdfjsLib.version || '?',
            build: pdfjsLib.build || '?'
          }, 'PDF.js v{{version}} (build: {{build}})') + '\n';
          if (moreInfo) {
            moreInfoText += mozL10n.get('error_message', { message: moreInfo.message }, 'Message: {{message}}');
            if (moreInfo.stack) {
              moreInfoText += '\n' + mozL10n.get('error_stack', { stack: moreInfo.stack }, 'Stack: {{stack}}');
            } else {
              if (moreInfo.filename) {
                moreInfoText += '\n' + mozL10n.get('error_file', { file: moreInfo.filename }, 'File: {{file}}');
              }
              if (moreInfo.lineNumber) {
                moreInfoText += '\n' + mozL10n.get('error_line', { line: moreInfo.lineNumber }, 'Line: {{line}}');
              }
            }
          }
          console.error(message + '\n' + moreInfoText);
          this.fallback();
        },
        progress: function pdfViewProgress(level) {
          var percent = Math.round(level * 100);
          // When we transition from full request to range requests, it's possible
          // that we discard some of the loaded data. This can cause the loading
          // bar to move backwards. So prevent this by only updating the bar if it
          // increases.
          if (percent > this.loadingBar.percent || isNaN(percent)) {
            this.loadingBar.percent = percent;
            // When disableAutoFetch is enabled, it's not uncommon for the entire file
            // to never be fetched (depends on e.g. the file structure). In this case
            // the loading bar will not be completely filled, nor will it be hidden.
            // To prevent displaying a partially filled loading bar permanently, we
            // hide it when no data has been loaded during a certain amount of time.
            if (pdfjsLib.PDFJS.disableAutoFetch && percent) {
              if (this.disableAutoFetchLoadingBarTimeout) {
                clearTimeout(this.disableAutoFetchLoadingBarTimeout);
                this.disableAutoFetchLoadingBarTimeout = null;
              }
              this.loadingBar.show();
              this.disableAutoFetchLoadingBarTimeout = setTimeout(function () {
                this.loadingBar.hide();
                this.disableAutoFetchLoadingBarTimeout = null;
              }.bind(this), DISABLE_AUTO_FETCH_LOADING_BAR_TIMEOUT);
            }
          }
        },
        load: function pdfViewLoad(pdfDocument, scale) {
          var self = this;
          scale = scale || UNKNOWN_SCALE;
          this.pdfDocument = pdfDocument;
          this.pdfDocumentProperties.setDocumentAndUrl(pdfDocument, this.url);
          var downloadedPromise = pdfDocument.getDownloadInfo().then(function () {
            self.downloadComplete = true;
            self.loadingBar.hide();
          });
          this._updateUIToolbar({ resetNumPages: true });
          var id = this.documentFingerprint = pdfDocument.fingerprint;
          var store = this.store = new ViewHistory(id);
          var baseDocumentUrl;
          baseDocumentUrl = this.baseUrl;
          this.pdfLinkService.setDocument(pdfDocument, baseDocumentUrl);
          var pdfViewer = this.pdfViewer;
          pdfViewer.currentScale = scale;
          pdfViewer.setDocument(pdfDocument);
          var firstPagePromise = pdfViewer.firstPagePromise;
          var pagesPromise = pdfViewer.pagesPromise;
          var onePageRendered = pdfViewer.onePageRendered;
          this.pageRotation = 0;
          var pdfThumbnailViewer = this.pdfThumbnailViewer;
          pdfThumbnailViewer.setDocument(pdfDocument);
          firstPagePromise.then(function (pdfPage) {
            downloadedPromise.then(function () {
              self.eventBus.dispatch('documentload', { source: self });
            });
            self.loadingBar.setWidth(self.appConfig.viewerContainer);
            if (!pdfjsLib.PDFJS.disableHistory && !self.isViewerEmbedded) {
              // The browsing history is only enabled when the viewer is standalone,
              // i.e. not when it is embedded in a web page.
              if (!self.preferenceShowPreviousViewOnLoad) {
                self.pdfHistory.clearHistoryState();
              }
              self.pdfHistory.initialize(self.documentFingerprint);
              if (self.pdfHistory.initialDestination) {
                self.initialDestination = self.pdfHistory.initialDestination;
              } else if (self.pdfHistory.initialBookmark) {
                self.initialBookmark = self.pdfHistory.initialBookmark;
              }
            }
            var initialParams = {
              destination: self.initialDestination,
              bookmark: self.initialBookmark,
              hash: null
            };
            store.initializedPromise.then(function resolved() {
              var storedHash = null, sidebarView = null;
              if (self.preferenceShowPreviousViewOnLoad && store.get('exists', false)) {
                var pageNum = store.get('page', '1');
                var zoom = self.preferenceDefaultZoomValue || store.get('zoom', DEFAULT_SCALE_VALUE);
                var left = store.get('scrollLeft', '0');
                var top = store.get('scrollTop', '0');
                storedHash = 'page=' + pageNum + '&zoom=' + zoom + ',' + left + ',' + top;
                sidebarView = store.get('sidebarView', SidebarView.NONE);
              } else if (self.preferenceDefaultZoomValue) {
                storedHash = 'page=1&zoom=' + self.preferenceDefaultZoomValue;
              }
              self.setInitialView(storedHash, {
                scale: scale,
                sidebarView: sidebarView
              });
              initialParams.hash = storedHash;
              // Make all navigation keys work on document load,
              // unless the viewer is embedded in a web page.
              if (!self.isViewerEmbedded) {
                self.pdfViewer.focus();
              }
            }, function rejected(reason) {
              console.error(reason);
              self.setInitialView(null, { scale: scale });
            });
            // For documents with different page sizes,
            // ensure that the correct location becomes visible on load.
            pagesPromise.then(function resolved() {
              if (!initialParams.destination && !initialParams.bookmark && !initialParams.hash) {
                return;
              }
              if (self.hasEqualPageSizes) {
                return;
              }
              self.initialDestination = initialParams.destination;
              self.initialBookmark = initialParams.bookmark;
              self.pdfViewer.currentScaleValue = self.pdfViewer.currentScaleValue;
              self.setInitialView(initialParams.hash);
            });
          });
          pdfDocument.getPageLabels().then(function (labels) {
            if (!labels || self.preferenceDisablePageLabels) {
              return;
            }
            var i = 0, numLabels = labels.length;
            if (numLabels !== self.pagesCount) {
              console.error('The number of Page Labels does not match ' + 'the number of pages in the document.');
              return;
            }
            // Ignore page labels that correspond to standard page numbering.
            while (i < numLabels && labels[i] === (i + 1).toString()) {
              i++;
            }
            if (i === numLabels) {
              return;
            }
            pdfViewer.setPageLabels(labels);
            pdfThumbnailViewer.setPageLabels(labels);
            self.hasPageLabels = true;
            self._updateUIToolbar({ resetNumPages: true });
          });
          pagesPromise.then(function () {
            if (self.supportsPrinting) {
              pdfDocument.getJavaScript().then(function (javaScript) {
                if (javaScript.length) {
                  console.warn('Warning: JavaScript is not supported');
                  self.fallback(pdfjsLib.UNSUPPORTED_FEATURES.javaScript);
                }
                // Hack to support auto printing.
                var regex = /\bprint\s*\(/;
                for (var i = 0, ii = javaScript.length; i < ii; i++) {
                  var js = javaScript[i];
                  if (js && regex.test(js)) {
                    setTimeout(function () {
                      window.print();
                    });
                    return;
                  }
                }
              });
            }
          });
          Promise.all([
            onePageRendered,
            this.animationStartedPromise
          ]).then(function () {
            pdfDocument.getOutline().then(function (outline) {
              self.pdfOutlineViewer.render({ outline: outline });
            });
            pdfDocument.getAttachments().then(function (attachments) {
              self.pdfAttachmentViewer.render({ attachments: attachments });
            });
          });
          pdfDocument.getMetadata().then(function (data) {
            var info = data.info, metadata = data.metadata;
            self.documentInfo = info;
            self.metadata = metadata;
            // Provides some basic debug information
            console.log('PDF ' + pdfDocument.fingerprint + ' [' + info.PDFFormatVersion + ' ' + (info.Producer || '-').trim() + ' / ' + (info.Creator || '-').trim() + ']' + ' (PDF.js: ' + (pdfjsLib.version || '-') + (!pdfjsLib.PDFJS.disableWebGL ? ' [WebGL]' : '') + ')');
            var pdfTitle;
            if (metadata && metadata.has('dc:title')) {
              var title = metadata.get('dc:title');
              // Ghostscript sometimes return 'Untitled', sets the title to 'Untitled'
              if (title !== 'Untitled') {
                pdfTitle = title;
              }
            }
            if (!pdfTitle && info && info['Title']) {
              pdfTitle = info['Title'];
            }
            if (pdfTitle) {
              self.setTitle(pdfTitle + ' - ' + document.title);
            }
            if (info.IsAcroFormPresent) {
              console.warn('Warning: AcroForm/XFA is not supported');
              self.fallback(pdfjsLib.UNSUPPORTED_FEATURES.forms);
            }
            var versionId = String(info.PDFFormatVersion).slice(-1) | 0;
            var generatorId = 0;
            var 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) {
              KNOWN_GENERATORS.some(function (generator, s, i) {
                if (generator.indexOf(s) < 0) {
                  return false;
                }
                generatorId = i + 1;
                return true;
              }.bind(null, info.Producer.toLowerCase()));
            }
            var formType = !info.IsAcroFormPresent ? null : info.IsXFAPresent ? 'xfa' : 'acroform';
            self.externalServices.reportTelemetry({
              type: 'documentInfo',
              version: versionId,
              generator: generatorId,
              formType: formType
            });
          });
        },
        setInitialView: function pdfViewSetInitialView(storedHash, options) {
          var scale = options && options.scale;
          var sidebarView = options && options.sidebarView;
          this.isInitialViewSet = true;
          this.pdfSidebar.setInitialView(this.preferenceSidebarViewOnLoad || sidebarView | 0);
          if (this.initialDestination) {
            this.pdfLinkService.navigateTo(this.initialDestination);
            this.initialDestination = null;
          } else if (this.initialBookmark) {
            this.pdfLinkService.setHash(this.initialBookmark);
            this.pdfHistory.push({ hash: this.initialBookmark }, true);
            this.initialBookmark = null;
          } else if (storedHash) {
            this.pdfLinkService.setHash(storedHash);
          } else if (scale) {
            this.pdfViewer.currentScaleValue = scale;
            this.page = 1;
          }
          if (!this.pdfViewer.currentScaleValue) {
            // Scale was not initialized: invalid bookmark or scale was not specified.
            // Setting the default one.
            this.pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE;
          }
        },
        cleanup: function pdfViewCleanup() {
          if (!this.pdfDocument) {
            return;
          }
          // run cleanup when document is loaded
          this.pdfViewer.cleanup();
          this.pdfThumbnailViewer.cleanup();
          this.pdfDocument.cleanup();
        },
        forceRendering: function pdfViewForceRendering() {
          this.pdfRenderingQueue.printing = this.printing;
          this.pdfRenderingQueue.isThumbnailViewEnabled = this.pdfSidebar.isThumbnailViewVisible;
          this.pdfRenderingQueue.renderHighestPriority();
        },
        beforePrint: function pdfViewSetupBeforePrint() {
          if (this.printService) {
            // There is no way to suppress beforePrint/afterPrint events,
            // but PDFPrintService may generate double events -- this will ignore
            // the second event that will be coming from native window.print().
            return;
          }
          if (!this.supportsPrinting) {
            var printMessage = mozL10n.get('printing_not_supported', null, 'Warning: Printing is not fully supported by this browser.');
            this.error(printMessage);
            return;
          }
          // The beforePrint is a sync method and we need to know layout before
          // returning from this method. Ensure that we can get sizes of the pages.
          if (!this.pdfViewer.pageViewsReady) {
            var notReadyMessage = mozL10n.get('printing_not_ready', null, 'Warning: The PDF is not fully loaded for printing.');
            window.alert(notReadyMessage);
            return;
          }
          var pagesOverview = this.pdfViewer.getPagesOverview();
          var printContainer = this.appConfig.printContainer;
          var printService = PDFPrintServiceFactory.instance.createPrintService(this.pdfDocument, pagesOverview, printContainer);
          this.printService = printService;
          this.forceRendering();
          printService.layout();
          this.externalServices.reportTelemetry({ type: 'print' });
        },
        // Whether all pages of the PDF have the same width and height.
        get hasEqualPageSizes() {
          var firstPage = this.pdfViewer.getPageView(0);
          for (var i = 1, ii = this.pagesCount; i < ii; ++i) {
            var pageView = this.pdfViewer.getPageView(i);
            if (pageView.width !== firstPage.width || pageView.height !== firstPage.height) {
              return false;
            }
          }
          return true;
        },
        afterPrint: function pdfViewSetupAfterPrint() {
          if (this.printService) {
            this.printService.destroy();
            this.printService = null;
          }
          this.forceRendering();
        },
        rotatePages: function pdfViewRotatePages(delta) {
          var pageNumber = this.page;
          this.pageRotation = (this.pageRotation + 360 + delta) % 360;
          this.pdfViewer.pagesRotation = this.pageRotation;
          this.pdfThumbnailViewer.pagesRotation = this.pageRotation;
          this.forceRendering();
          this.pdfViewer.currentPageNumber = pageNumber;
        },
        requestPresentationMode: function pdfViewRequestPresentationMode() {
          if (!this.pdfPresentationMode) {
            return;
          }
          this.pdfPresentationMode.request();
        },
        /**
         * @typedef UpdateUIToolbarParameters
         * @property {number} pageNumber
         * @property {string} pageLabel
         * @property {string} scaleValue
         * @property {number} scale
         * @property {boolean} resetNumPages
         */
        /**
         * @param {Object} UpdateUIToolbarParameters
         * @private
         */
        _updateUIToolbar: function (params) {
          function selectScaleOption(value, scale) {
            var options = toolbarConfig.scaleSelect.options;
            var predefinedValueFound = false;
            for (var i = 0, ii = options.length; i < ii; i++) {
              var option = options[i];
              if (option.value !== value) {
                option.selected = false;
                continue;
              }
              option.selected = true;
              predefinedValueFound = true;
            }
            if (!predefinedValueFound) {
              var customScale = Math.round(scale * 10000) / 100;
              toolbarConfig.customScaleOption.textContent = mozL10n.get('page_scale_percent', { scale: customScale }, '{{scale}}%');
              toolbarConfig.customScaleOption.selected = true;
            }
          }
          var pageNumber = params.pageNumber || this.pdfViewer.currentPageNumber;
          var scaleValue = (params.scaleValue || params.scale || this.pdfViewer.currentScaleValue || DEFAULT_SCALE_VALUE).toString();
          var scale = params.scale || this.pdfViewer.currentScale;
          var resetNumPages = params.resetNumPages || false;
          var toolbarConfig = this.appConfig.toolbar;
          var pagesCount = this.pagesCount;
          if (resetNumPages) {
            if (this.hasPageLabels) {
              toolbarConfig.pageNumber.type = 'text';
            } else {
              toolbarConfig.pageNumber.type = 'number';
              toolbarConfig.numPages.textContent = mozL10n.get('of_pages', { pagesCount: pagesCount }, 'of {{pagesCount}}');
            }
            toolbarConfig.pageNumber.max = pagesCount;
          }
          if (this.hasPageLabels) {
            toolbarConfig.pageNumber.value = params.pageLabel || this.pdfViewer.currentPageLabel;
            toolbarConfig.numPages.textContent = mozL10n.get('page_of_pages', {
              pageNumber: pageNumber,
              pagesCount: pagesCount
            }, '({{pageNumber}} of {{pagesCount}})');
          } else {
            toolbarConfig.pageNumber.value = pageNumber;
          }
          toolbarConfig.previous.disabled = pageNumber <= 1;
          toolbarConfig.next.disabled = pageNumber >= pagesCount;
          toolbarConfig.firstPage.disabled = pageNumber <= 1;
          toolbarConfig.lastPage.disabled = pageNumber >= pagesCount;
          toolbarConfig.zoomOut.disabled = scale <= MIN_SCALE;
          toolbarConfig.zoomIn.disabled = scale >= MAX_SCALE;
          selectScaleOption(scaleValue, scale);
        },
        bindEvents: function pdfViewBindEvents() {
          var eventBus = this.eventBus;
          eventBus.on('resize', webViewerResize);
          eventBus.on('localized', webViewerLocalized);
          eventBus.on('hashchange', webViewerHashchange);
          eventBus.on('beforeprint', this.beforePrint.bind(this));
          eventBus.on('afterprint', this.afterPrint.bind(this));
          eventBus.on('pagerendered', webViewerPageRendered);
          eventBus.on('textlayerrendered', webViewerTextLayerRendered);
          eventBus.on('updateviewarea', webViewerUpdateViewarea);
          eventBus.on('pagechanging', webViewerPageChanging);
          eventBus.on('scalechanging', webViewerScaleChanging);
          eventBus.on('sidebarviewchanged', webViewerSidebarViewChanged);
          eventBus.on('pagemode', webViewerPageMode);
          eventBus.on('namedaction', webViewerNamedAction);
          eventBus.on('presentationmodechanged', webViewerPresentationModeChanged);
          eventBus.on('presentationmode', webViewerPresentationMode);
          eventBus.on('openfile', webViewerOpenFile);
          eventBus.on('print', webViewerPrint);
          eventBus.on('download', webViewerDownload);
          eventBus.on('firstpage', webViewerFirstPage);
          eventBus.on('lastpage', webViewerLastPage);
          eventBus.on('rotatecw', webViewerRotateCw);
          eventBus.on('rotateccw', webViewerRotateCcw);
          eventBus.on('documentproperties', webViewerDocumentProperties);
          eventBus.on('find', webViewerFind);
          eventBus.on('findfromurlhash', webViewerFindFromUrlHash);
        }
      };
      var validateFileURL;
      function loadAndEnablePDFBug(enabledTabs) {
        return new Promise(function (resolve, reject) {
          var appConfig = PDFViewerApplication.appConfig;
          var script = document.createElement('script');
          script.src = appConfig.debuggerScriptPath;
          script.onload = function () {
            PDFBug.enable(enabledTabs);
            PDFBug.init(pdfjsLib, appConfig.mainContainer);
            resolve();
          };
          script.onerror = function () {
            reject(new Error('Cannot load debugger at ' + script.src));
          };
          (document.getElementsByTagName('head')[0] || document.body).appendChild(script);
        });
      }
      function webViewerInitialized() {
        var file;
        file = window.location.href.split('#')[0];
        var waitForBeforeOpening = [];
        var appConfig = PDFViewerApplication.appConfig;
        appConfig.toolbar.openFile.setAttribute('hidden', 'true');
        appConfig.secondaryToolbar.openFileButton.setAttribute('hidden', 'true');
        var PDFJS = pdfjsLib.PDFJS;
        if (PDFViewerApplication.preferencePdfBugEnabled) {
          // Special debugging flags in the hash section of the URL.
          var hash = document.location.hash.substring(1);
          var hashParams = parseQueryString(hash);
          if ('disableworker' in hashParams) {
            PDFJS.disableWorker = hashParams['disableworker'] === 'true';
          }
          if ('disablerange' in hashParams) {
            PDFJS.disableRange = hashParams['disablerange'] === 'true';
          }
          if ('disablestream' in hashParams) {
            PDFJS.disableStream = hashParams['disablestream'] === 'true';
          }
          if ('disableautofetch' in hashParams) {
            PDFJS.disableAutoFetch = hashParams['disableautofetch'] === 'true';
          }
          if ('disablefontface' in hashParams) {
            PDFJS.disableFontFace = hashParams['disablefontface'] === 'true';
          }
          if ('disablehistory' in hashParams) {
            PDFJS.disableHistory = hashParams['disablehistory'] === 'true';
          }
          if ('webgl' in hashParams) {
            PDFJS.disableWebGL = hashParams['webgl'] !== 'true';
          }
          if ('useonlycsszoom' in hashParams) {
            PDFJS.useOnlyCssZoom = hashParams['useonlycsszoom'] === 'true';
          }
          if ('verbosity' in hashParams) {
            PDFJS.verbosity = hashParams['verbosity'] | 0;
          }
          if ('ignorecurrentpositiononzoom' in hashParams) {
            PDFJS.ignoreCurrentPositionOnZoom = hashParams['ignorecurrentpositiononzoom'] === 'true';
          }
          if ('textlayer' in hashParams) {
            switch (hashParams['textlayer']) {
            case 'off':
              PDFJS.disableTextLayer = true;
              break;
            case 'visible':
            case 'shadow':
            case 'hover':
              var viewer = appConfig.viewerContainer;
              viewer.classList.add('textLayer-' + hashParams['textlayer']);
              break;
            }
          }
          if ('pdfbug' in hashParams) {
            PDFJS.pdfBug = true;
            var pdfBug = hashParams['pdfbug'];
            var enabled = pdfBug.split(',');
            waitForBeforeOpening.push(loadAndEnablePDFBug(enabled));
          }
        }
        if (!PDFViewerApplication.supportsDocumentFonts) {
          PDFJS.disableFontFace = true;
          console.warn(mozL10n.get('web_fonts_disabled', null, 'Web fonts are disabled: unable to use embedded PDF fonts.'));
        }
        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');
        }
        // Suppress context menus for some controls
        appConfig.toolbar.scaleSelect.oncontextmenu = noContextMenuHandler;
        appConfig.sidebar.mainContainer.addEventListener('transitionend', function (e) {
          if (e.target === /* mainContainer */
            this) {
            PDFViewerApplication.eventBus.dispatch('resize');
          }
        }, true);
        appConfig.sidebar.toggleButton.addEventListener('click', function () {
          PDFViewerApplication.pdfSidebar.toggle();
        });
        appConfig.toolbar.previous.addEventListener('click', function () {
          PDFViewerApplication.page--;
        });
        appConfig.toolbar.next.addEventListener('click', function () {
          PDFViewerApplication.page++;
        });
        appConfig.toolbar.zoomIn.addEventListener('click', function () {
          PDFViewerApplication.zoomIn();
        });
        appConfig.toolbar.zoomOut.addEventListener('click', function () {
          PDFViewerApplication.zoomOut();
        });
        appConfig.toolbar.pageNumber.addEventListener('click', function () {
          this.select();
        });
        appConfig.toolbar.pageNumber.addEventListener('change', function () {
          var pdfViewer = PDFViewerApplication.pdfViewer;
          pdfViewer.currentPageLabel = this.value;
          // Ensure that the page number input displays the correct value, even if the
          // value entered by the user was invalid (e.g. a floating point number).
          if (this.value !== pdfViewer.currentPageNumber.toString() && this.value !== pdfViewer.currentPageLabel) {
            PDFViewerApplication._updateUIToolbar({});
          }
        });
        appConfig.toolbar.scaleSelect.addEventListener('change', function () {
          if (this.value === 'custom') {
            return;
          }
          PDFViewerApplication.pdfViewer.currentScaleValue = this.value;
        });
        appConfig.toolbar.presentationModeButton.addEventListener('click', function (e) {
          PDFViewerApplication.eventBus.dispatch('presentationmode');
        });
        appConfig.toolbar.openFile.addEventListener('click', function (e) {
          PDFViewerApplication.eventBus.dispatch('openfile');
        });
        appConfig.toolbar.print.addEventListener('click', function (e) {
          PDFViewerApplication.eventBus.dispatch('print');
        });
        appConfig.toolbar.download.addEventListener('click', function (e) {
          PDFViewerApplication.eventBus.dispatch('download');
        });
        Promise.all(waitForBeforeOpening).then(function () {
          webViewerOpenFileViaURL(file);
        }).catch(function (reason) {
          PDFViewerApplication.error(mozL10n.get('loading_error', null, 'An error occurred while opening.'), reason);
        });
      }
      var webViewerOpenFileViaURL;
      webViewerOpenFileViaURL = function webViewerOpenFileViaURL(file) {
        PDFViewerApplication.setTitleUsingUrl(file);
        PDFViewerApplication.initPassiveLoading();
      };
      function webViewerPageRendered(e) {
        var pageNumber = e.pageNumber;
        var pageIndex = pageNumber - 1;
        var pageView = PDFViewerApplication.pdfViewer.getPageView(pageIndex);
        // If the page is still visible when it has finished rendering,
        // ensure that the page number input loading indicator is hidden.
        if (pageNumber === PDFViewerApplication.page) {
          var pageNumberInput = PDFViewerApplication.appConfig.toolbar.pageNumber;
          pageNumberInput.classList.remove(PAGE_NUMBER_LOADING_INDICATOR);
        }
        // Prevent errors in the edge-case where the PDF document is removed *before*
        // the 'pagerendered' event handler is invoked.
        if (!pageView) {
          return;
        }
        // Use the rendered page to set the corresponding thumbnail image.
        if (PDFViewerApplication.pdfSidebar.isThumbnailViewVisible) {
          var thumbnailView = PDFViewerApplication.pdfThumbnailViewer.getThumbnail(pageIndex);
          thumbnailView.setImage(pageView);
        }
        if (pdfjsLib.PDFJS.pdfBug && Stats.enabled && pageView.stats) {
          Stats.add(pageNumber, pageView.stats);
        }
        if (pageView.error) {
          PDFViewerApplication.error(mozL10n.get('rendering_error', null, 'An error occurred while rendering the page.'), pageView.error);
        }
        PDFViewerApplication.externalServices.reportTelemetry({ type: 'pageInfo' });
        // It is a good time to report stream and font types.
        PDFViewerApplication.pdfDocument.getStats().then(function (stats) {
          PDFViewerApplication.externalServices.reportTelemetry({
            type: 'documentStats',
            stats: stats
          });
        });
      }
      function webViewerTextLayerRendered(e) {
        if (e.numTextDivs > 0 && !PDFViewerApplication.supportsDocumentColors) {
          console.error(mozL10n.get('document_colors_not_allowed', null, 'PDF documents are not allowed to use their own colors: ' + '\'Allow pages to choose their own colors\' ' + 'is deactivated in the browser.'));
          PDFViewerApplication.fallback();
        }
      }
      function webViewerPageMode(e) {
        if (!PDFViewerApplication.initialized) {
          return;
        }
        // Handle the 'pagemode' hash parameter, see also `PDFLinkService_setHash`.
        var mode = e.mode, view;
        switch (mode) {
        case 'thumbs':
          view = SidebarView.THUMBS;
          break;
        case 'bookmarks':
        case 'outline':
          view = SidebarView.OUTLINE;
          break;
        case 'attachments':
          view = SidebarView.ATTACHMENTS;
          break;
        case 'none':
          view = SidebarView.NONE;
          break;
        default:
          console.error('Invalid "pagemode" hash parameter: ' + mode);
          return;
        }
        PDFViewerApplication.pdfSidebar.switchView(view, /* forceOpen = */
        true);
      }
      function webViewerNamedAction(e) {
        if (!PDFViewerApplication.initialized) {
          return;
        }
        // Processing couple of named actions that might be useful.
        // See also PDFLinkService.executeNamedAction
        var action = e.action;
        switch (action) {
        case 'GoToPage':
          PDFViewerApplication.appConfig.toolbar.pageNumber.select();
          break;
        case 'Find':
          if (!PDFViewerApplication.supportsIntegratedFind) {
            PDFViewerApplication.findBar.toggle();
          }
          break;
        }
      }
      function webViewerPresentationModeChanged(e) {
        var active = e.active;
        var switchInProgress = e.switchInProgress;
        PDFViewerApplication.pdfViewer.presentationModeState = switchInProgress ? PresentationModeState.CHANGING : active ? PresentationModeState.FULLSCREEN : PresentationModeState.NORMAL;
      }
      function webViewerSidebarViewChanged(e) {
        if (!PDFViewerApplication.initialized) {
          return;
        }
        PDFViewerApplication.pdfRenderingQueue.isThumbnailViewEnabled = PDFViewerApplication.pdfSidebar.isThumbnailViewVisible;
        var store = PDFViewerApplication.store;
        if (!store || !PDFViewerApplication.isInitialViewSet) {
          // Only update the storage when the document has been loaded *and* rendered.
          return;
        }
        store.initializedPromise.then(function () {
          store.set('sidebarView', e.view).catch(function () {
          });
        });
      }
      function webViewerUpdateViewarea(e) {
        if (!PDFViewerApplication.initialized) {
          return;
        }
        var location = e.location, store = PDFViewerApplication.store;
        if (store) {
          store.initializedPromise.then(function () {
            store.setMultiple({
              'exists': true,
              'page': location.pageNumber,
              'zoom': location.scale,
              'scrollLeft': location.left,
              'scrollTop': location.top
            }).catch(function () {
            });
          });
        }
        var href = PDFViewerApplication.pdfLinkService.getAnchorUrl(location.pdfOpenParams);
        PDFViewerApplication.appConfig.toolbar.viewBookmark.href = href;
        PDFViewerApplication.appConfig.secondaryToolbar.viewBookmarkButton.href = href;
        // Update the current bookmark in the browsing history.
        PDFViewerApplication.pdfHistory.updateCurrentBookmark(location.pdfOpenParams, location.pageNumber);
        // Show/hide the loading indicator in the page number input element.
        var pageNumberInput = PDFViewerApplication.appConfig.toolbar.pageNumber;
        var currentPage = PDFViewerApplication.pdfViewer.getPageView(PDFViewerApplication.page - 1);
        if (currentPage.renderingState === RenderingStates.FINISHED) {
          pageNumberInput.classList.remove(PAGE_NUMBER_LOADING_INDICATOR);
        } else {
          pageNumberInput.classList.add(PAGE_NUMBER_LOADING_INDICATOR);
        }
      }
      window.addEventListener('resize', function webViewerResize(evt) {
        if (!PDFViewerApplication.eventBus) {
          return;
        }
        PDFViewerApplication.eventBus.dispatch('resize');
      });
      function webViewerResize() {
        if (PDFViewerApplication.initialized) {
          var currentScaleValue = PDFViewerApplication.pdfViewer.currentScaleValue;
          if (currentScaleValue === 'auto' || currentScaleValue === 'page-fit' || currentScaleValue === 'page-width') {
            // Note: the scale is constant for 'page-actual'.
            PDFViewerApplication.pdfViewer.currentScaleValue = currentScaleValue;
          } else if (!currentScaleValue) {
            // Normally this shouldn't happen, but if the scale wasn't initialized
            // we set it to the default value in order to prevent any issues.
            // (E.g. the document being rendered with the wrong scale on load.)
            PDFViewerApplication.pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE;
          }
          PDFViewerApplication.pdfViewer.update();
        }
      }
      window.addEventListener('hashchange', function webViewerHashchange(evt) {
        var hash = document.location.hash.substring(1);
        PDFViewerApplication.eventBus.dispatch('hashchange', { hash: hash });
      });
      function webViewerHashchange(e) {
        if (PDFViewerApplication.pdfHistory.isHashChangeUnlocked) {
          var hash = e.hash;
          if (!hash) {
            return;
          }
          if (!PDFViewerApplication.isInitialViewSet) {
            PDFViewerApplication.initialBookmark = hash;
          } else {
            PDFViewerApplication.pdfLinkService.setHash(hash);
          }
        }
      }
      var webViewerFileInputChange;
      window.addEventListener('localized', function localized(evt) {
        PDFViewerApplication.eventBus.dispatch('localized');
      });
      function webViewerLocalized() {
        document.getElementsByTagName('html')[0].dir = mozL10n.getDirection();
        PDFViewerApplication.animationStartedPromise.then(function () {
          // Adjust the width of the zoom box to fit the content.
          // Note: If the window is narrow enough that the zoom box is not visible,
          //       we temporarily show it to be able to adjust its width.
          var container = PDFViewerApplication.appConfig.toolbar.scaleSelectContainer;
          if (container.clientWidth === 0) {
            container.setAttribute('style', 'display: inherit;');
          }
          if (container.clientWidth > 0) {
            var select = PDFViewerApplication.appConfig.toolbar.scaleSelect;
            select.setAttribute('style', 'min-width: inherit;');
            var width = select.clientWidth + SCALE_SELECT_CONTAINER_PADDING;
            select.setAttribute('style', 'min-width: ' + (width + SCALE_SELECT_PADDING) + 'px;');
            container.setAttribute('style', 'min-width: ' + width + 'px; ' + 'max-width: ' + width + 'px;');
          }
        });
      }
      function webViewerPresentationMode() {
        PDFViewerApplication.requestPresentationMode();
      }
      function webViewerOpenFile() {
        var openFileInputName = PDFViewerApplication.appConfig.openFileInputName;
        document.getElementById(openFileInputName).click();
      }
      function webViewerPrint() {
        window.print();
      }
      function webViewerDownload() {
        PDFViewerApplication.download();
      }
      function webViewerFirstPage() {
        if (PDFViewerApplication.pdfDocument) {
          PDFViewerApplication.page = 1;
        }
      }
      function webViewerLastPage() {
        if (PDFViewerApplication.pdfDocument) {
          PDFViewerApplication.page = PDFViewerApplication.pagesCount;
        }
      }
      function webViewerRotateCw() {
        PDFViewerApplication.rotatePages(90);
      }
      function webViewerRotateCcw() {
        PDFViewerApplication.rotatePages(-90);
      }
      function webViewerDocumentProperties() {
        PDFViewerApplication.pdfDocumentProperties.open();
      }
      function webViewerFind(e) {
        PDFViewerApplication.findController.executeCommand('find' + e.type, {
          query: e.query,
          phraseSearch: e.phraseSearch,
          caseSensitive: e.caseSensitive,
          highlightAll: e.highlightAll,
          findPrevious: e.findPrevious
        });
      }
      function webViewerFindFromUrlHash(e) {
        PDFViewerApplication.findController.executeCommand('find', {
          query: e.query,
          phraseSearch: e.phraseSearch,
          caseSensitive: false,
          highlightAll: true,
          findPrevious: false
        });
      }
      function webViewerScaleChanging(e) {
        PDFViewerApplication._updateUIToolbar({
          scaleValue: e.presetValue,
          scale: e.scale
        });
        if (!PDFViewerApplication.initialized) {
          return;
        }
        PDFViewerApplication.pdfViewer.update();
      }
      function webViewerPageChanging(e) {
        var page = e.pageNumber;
        PDFViewerApplication._updateUIToolbar({
          pageNumber: page,
          pageLabel: e.pageLabel
        });
        if (PDFViewerApplication.pdfSidebar.isThumbnailViewVisible) {
          PDFViewerApplication.pdfThumbnailViewer.scrollThumbnailIntoView(page);
        }
        // we need to update stats
        if (pdfjsLib.PDFJS.pdfBug && Stats.enabled) {
          var pageView = PDFViewerApplication.pdfViewer.getPageView(page - 1);
          if (pageView.stats) {
            Stats.add(page, pageView.stats);
          }
        }
      }
      var zoomDisabled = false, zoomDisabledTimeout;
      function handleMouseWheel(evt) {
        var pdfViewer = PDFViewerApplication.pdfViewer;
        if (!pdfViewer || pdfViewer.isInPresentationMode) {
          return;
        }
        if (evt.ctrlKey || evt.metaKey) {
          var support = PDFViewerApplication.supportedMouseWheelZoomModifierKeys;
          if (evt.ctrlKey && !support.ctrlKey || evt.metaKey && !support.metaKey) {
            return;
          }
          // Only zoom the pages, not the entire viewer.
          evt.preventDefault();
          // NOTE: this check must be placed *after* preventDefault.
          if (zoomDisabled) {
            return;
          }
          var previousScale = pdfViewer.currentScale;
          var delta = normalizeWheelEventDelta(evt);
          var MOUSE_WHEEL_DELTA_PER_PAGE_SCALE = 3.0;
          var ticks = delta * MOUSE_WHEEL_DELTA_PER_PAGE_SCALE;
          if (ticks < 0) {
            PDFViewerApplication.zoomOut(-ticks);
          } else {
            PDFViewerApplication.zoomIn(ticks);
          }
          var currentScale = pdfViewer.currentScale;
          if (previousScale !== currentScale) {
            // After scaling the page via zoomIn/zoomOut, the position of the upper-
            // left corner is restored. When the mouse wheel is used, the position
            // under the cursor should be restored instead.
            var scaleCorrectionFactor = currentScale / previousScale - 1;
            var rect = pdfViewer.container.getBoundingClientRect();
            var dx = evt.clientX - rect.left;
            var dy = evt.clientY - rect.top;
            pdfViewer.container.scrollLeft += dx * scaleCorrectionFactor;
            pdfViewer.container.scrollTop += dy * scaleCorrectionFactor;
          }
        } else {
          zoomDisabled = true;
          clearTimeout(zoomDisabledTimeout);
          zoomDisabledTimeout = setTimeout(function () {
            zoomDisabled = false;
          }, 1000);
        }
      }
      window.addEventListener('wheel', handleMouseWheel);
      window.addEventListener('click', function click(evt) {
        if (!PDFViewerApplication.secondaryToolbar.isOpen) {
          return;
        }
        var appConfig = PDFViewerApplication.appConfig;
        if (PDFViewerApplication.pdfViewer.containsElement(evt.target) || appConfig.toolbar.container.contains(evt.target) && evt.target !== appConfig.secondaryToolbar.toggleButton) {
          PDFViewerApplication.secondaryToolbar.close();
        }
      }, true);
      window.addEventListener('keydown', function keydown(evt) {
        if (OverlayManager.active) {
          return;
        }
        var handled = false;
        var cmd = (evt.ctrlKey ? 1 : 0) | (evt.altKey ? 2 : 0) | (evt.shiftKey ? 4 : 0) | (evt.metaKey ? 8 : 0);
        var pdfViewer = PDFViewerApplication.pdfViewer;
        var isViewerInPresentationMode = pdfViewer && pdfViewer.isInPresentationMode;
        // First, handle the key bindings that are independent whether an input
        // control is selected or not.
        if (cmd === 1 || cmd === 8 || cmd === 5 || cmd === 12) {
          // either CTRL or META key with optional SHIFT.
          switch (evt.keyCode) {
          case 70:
            // f
            if (!PDFViewerApplication.supportsIntegratedFind) {
              PDFViewerApplication.findBar.open();
              handled = true;
            }
            break;
          case 71:
            // g
            if (!PDFViewerApplication.supportsIntegratedFind) {
              var findState = PDFViewerApplication.findController.state;
              if (findState) {
                PDFViewerApplication.findController.executeCommand('findagain', {
                  query: findState.query,
                  phraseSearch: findState.phraseSearch,
                  caseSensitive: findState.caseSensitive,
                  highlightAll: findState.highlightAll,
                  findPrevious: cmd === 5 || cmd === 12
                });
              }
              handled = true;
            }
            break;
          case 61:
          // FF/Mac '='
          case 107:
          // FF '+' and '='
          case 187:
          // Chrome '+'
          case 171:
            // FF with German keyboard
            if (!isViewerInPresentationMode) {
              PDFViewerApplication.zoomIn();
            }
            handled = true;
            break;
          case 173:
          // FF/Mac '-'
          case 109:
          // FF '-'
          case 189:
            // Chrome '-'
            if (!isViewerInPresentationMode) {
              PDFViewerApplication.zoomOut();
            }
            handled = true;
            break;
          case 48:
          // '0'
          case 96:
            // '0' on Numpad of Swedish keyboard
            if (!isViewerInPresentationMode) {
              // keeping it unhandled (to restore page zoom to 100%)
              setTimeout(function () {
                // ... and resetting the scale after browser adjusts its scale
                pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE;
              });
              handled = false;
            }
            break;
          }
        }
        // CTRL+ALT or Option+Command
        if (cmd === 3 || cmd === 10) {
          switch (evt.keyCode) {
          case 80:
            // p
            PDFViewerApplication.requestPresentationMode();
            handled = true;
            break;
          case 71:
            // g
            // focuses input#pageNumber field
            PDFViewerApplication.appConfig.toolbar.pageNumber.select();
            handled = true;
            break;
          }
        }
        if (handled) {
          evt.preventDefault();
          return;
        }
        // Some shortcuts should not get handled if a control/input element
        // is selected.
        var curElement = document.activeElement || document.querySelector(':focus');
        var curElementTagName = curElement && curElement.tagName.toUpperCase();
        if (curElementTagName === 'INPUT' || curElementTagName === 'TEXTAREA' || curElementTagName === 'SELECT') {
          // Make sure that the secondary toolbar is closed when Escape is pressed.
          if (evt.keyCode !== 27) {
            // 'Esc'
            return;
          }
        }
        var ensureViewerFocused = false;
        if (cmd === 0) {
          // no control key pressed at all.
          switch (evt.keyCode) {
          case 38:
          // up arrow
          case 33:
          // pg up
          case 8:
            // backspace
            if (!isViewerInPresentationMode && pdfViewer.currentScaleValue !== 'page-fit') {
              break;
            }
          /* in presentation mode */
          case 37:
            // left arrow
            // horizontal scrolling using arrow keys
            if (pdfViewer.isHorizontalScrollbarEnabled) {
              break;
            }
          case 75:
          // 'k'
          case 80:
            // 'p'
            if (PDFViewerApplication.page > 1) {
              PDFViewerApplication.page--;
            }
            handled = true;
            break;
          case 27:
            // esc key
            if (PDFViewerApplication.secondaryToolbar.isOpen) {
              PDFViewerApplication.secondaryToolbar.close();
              handled = true;
            }
            if (!PDFViewerApplication.supportsIntegratedFind && PDFViewerApplication.findBar.opened) {
              PDFViewerApplication.findBar.close();
              handled = true;
            }
            break;
          case 40:
          // down arrow
          case 34:
          // pg down
          case 32:
            // spacebar
            if (!isViewerInPresentationMode && pdfViewer.currentScaleValue !== 'page-fit') {
              break;
            }
          case 39:
            // right arrow
            // horizontal scrolling using arrow keys
            if (pdfViewer.isHorizontalScrollbarEnabled) {
              break;
            }
          case 74:
          // 'j'
          case 78:
            // 'n'
            if (PDFViewerApplication.page < PDFViewerApplication.pagesCount) {
              PDFViewerApplication.page++;
            }
            handled = true;
            break;
          case 36:
            // home
            if (isViewerInPresentationMode || PDFViewerApplication.page > 1) {
              PDFViewerApplication.page = 1;
              handled = true;
              ensureViewerFocused = true;
            }
            break;
          case 35:
            // end
            if (isViewerInPresentationMode || PDFViewerApplication.page < PDFViewerApplication.pagesCount) {
              PDFViewerApplication.page = PDFViewerApplication.pagesCount;
              handled = true;
              ensureViewerFocused = true;
            }
            break;
          case 72:
            // 'h'
            if (!isViewerInPresentationMode) {
              PDFViewerApplication.handTool.toggle();
            }
            break;
          case 82:
            // 'r'
            PDFViewerApplication.rotatePages(90);
            break;
          }
        }
        if (cmd === 4) {
          // shift-key
          switch (evt.keyCode) {
          case 32:
            // spacebar
            if (!isViewerInPresentationMode && pdfViewer.currentScaleValue !== 'page-fit') {
              break;
            }
            if (PDFViewerApplication.page > 1) {
              PDFViewerApplication.page--;
            }
            handled = true;
            break;
          case 82:
            // 'r'
            PDFViewerApplication.rotatePages(-90);
            break;
          }
        }
        if (!handled && !isViewerInPresentationMode) {
          // 33=Page Up  34=Page Down  35=End    36=Home
          // 37=Left     38=Up         39=Right  40=Down
          // 32=Spacebar
          if (evt.keyCode >= 33 && evt.keyCode <= 40 || evt.keyCode === 32 && curElementTagName !== 'BUTTON') {
            ensureViewerFocused = true;
          }
        }
        if (cmd === 2) {
          // alt-key
          switch (evt.keyCode) {
          case 37:
            // left arrow
            if (isViewerInPresentationMode) {
              PDFViewerApplication.pdfHistory.back();
              handled = true;
            }
            break;
          case 39:
            // right arrow
            if (isViewerInPresentationMode) {
              PDFViewerApplication.pdfHistory.forward();
              handled = true;
            }
            break;
          }
        }
        if (ensureViewerFocused && !pdfViewer.containsElement(curElement)) {
          // The page container is not focused, but a page navigation key has been
          // pressed. Change the focus to the viewer container to make sure that
          // navigation by keyboard works as expected.
          pdfViewer.focus();
        }
        if (handled) {
          evt.preventDefault();
        }
      });
      window.addEventListener('beforeprint', function beforePrint(evt) {
        PDFViewerApplication.eventBus.dispatch('beforeprint');
      });
      window.addEventListener('afterprint', function afterPrint(evt) {
        PDFViewerApplication.eventBus.dispatch('afterprint');
      });
      (function animationStartedClosure() {
        // The offsetParent is not set until the pdf.js iframe or object is visible.
        // Waiting for first animation.
        PDFViewerApplication.animationStartedPromise = new Promise(function (resolve) {
          window.requestAnimationFrame(resolve);
        });
      }());
      /* Abstract factory for the print service. */
      var PDFPrintServiceFactory = {
        instance: {
          supportsPrinting: false,
          createPrintService: function () {
            throw new Error('Not implemented: createPrintService');
          }
        }
      };
      exports.PDFViewerApplication = PDFViewerApplication;
      exports.DefaultExernalServices = DefaultExernalServices;
      exports.PDFPrintServiceFactory = PDFPrintServiceFactory;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebFirefoxPrintService = {}, root.pdfjsWebUIUtils, root.pdfjsWebApp, root.pdfjsWebPDFJS);
    }(this, function (exports, uiUtils, app, pdfjsLib) {
      var CSS_UNITS = uiUtils.CSS_UNITS;
      var PDFPrintServiceFactory = app.PDFPrintServiceFactory;
      // Creates a placeholder with div and canvas with right size for the page.
      function composePage(pdfDocument, pageNumber, size, printContainer) {
        var canvas = document.createElement('canvas');
        // The size of the canvas in pixels for printing.
        var PRINT_RESOLUTION = 150;
        var PRINT_UNITS = PRINT_RESOLUTION / 72.0;
        canvas.width = Math.floor(size.width * PRINT_UNITS);
        canvas.height = Math.floor(size.height * PRINT_UNITS);
        // The physical size of the canvas as specified by the PDF document.
        canvas.style.width = Math.floor(size.width * CSS_UNITS) + 'px';
        canvas.style.height = Math.floor(size.height * CSS_UNITS) + 'px';
        var canvasWrapper = document.createElement('div');
        canvasWrapper.appendChild(canvas);
        printContainer.appendChild(canvasWrapper);
        canvas.mozPrintCallback = function (obj) {
          // Printing/rendering the page.
          var ctx = obj.context;
          ctx.save();
          ctx.fillStyle = 'rgb(255, 255, 255)';
          ctx.fillRect(0, 0, canvas.width, canvas.height);
          ctx.restore();
          pdfDocument.getPage(pageNumber).then(function (pdfPage) {
            var renderContext = {
              canvasContext: ctx,
              transform: [
                PRINT_UNITS,
                0,
                0,
                PRINT_UNITS,
                0,
                0
              ],
              viewport: pdfPage.getViewport(1),
              intent: 'print'
            };
            return pdfPage.render(renderContext).promise;
          }).then(function () {
            // Tell the printEngine that rendering this canvas/page has finished.
            obj.done();
          }, function (error) {
            console.error(error);
            // Tell the printEngine that rendering this canvas/page has failed.
            // This will make the print process stop.
            if ('abort' in obj) {
              obj.abort();
            } else {
              obj.done();
            }
          });
        };
      }
      function FirefoxPrintService(pdfDocument, pagesOverview, printContainer) {
        this.pdfDocument = pdfDocument;
        this.pagesOverview = pagesOverview;
        this.printContainer = printContainer;
      }
      FirefoxPrintService.prototype = {
        layout: function () {
          var pdfDocument = this.pdfDocument;
          var printContainer = this.printContainer;
          var body = document.querySelector('body');
          body.setAttribute('data-pdfjsprinting', true);
          for (var i = 0, ii = this.pagesOverview.length; i < ii; ++i) {
            composePage(pdfDocument, i + 1, this.pagesOverview[i], printContainer);
          }
        },
        destroy: function () {
          this.printContainer.textContent = '';
        }
      };
      PDFPrintServiceFactory.instance = {
        get supportsPrinting() {
          var canvas = document.createElement('canvas');
          var value = 'mozPrintCallback' in canvas;
          return pdfjsLib.shadow(this, 'supportsPrinting', value);
        },
        createPrintService: function (pdfDocument, pagesOverview, printContainer) {
          return new FirefoxPrintService(pdfDocument, pagesOverview, printContainer);
        }
      };
      exports.FirefoxPrintService = FirefoxPrintService;
    }));
    (function (root, factory) {
      factory(root.pdfjsWebFirefoxCom = {}, root.pdfjsWebPreferences, root.pdfjsWebApp, root.pdfjsWebPDFJS);
    }(this, function (exports, preferences, app, pdfjsLib) {
      var Preferences = preferences.Preferences;
      var PDFViewerApplication = app.PDFViewerApplication;
      var FirefoxCom = function FirefoxComClosure() {
        return {
          /**
           * Creates an event that the extension is listening for and will
           * synchronously respond to.
           * NOTE: It is reccomended to use request() instead since one day we may not
           * be able to synchronously reply.
           * @param {String} action The action to trigger.
           * @param {String} data Optional data to send.
           * @return {*} The response.
           */
          requestSync: function (action, data) {
            var request = document.createTextNode('');
            document.documentElement.appendChild(request);
            var sender = document.createEvent('CustomEvent');
            sender.initCustomEvent('pdf.js.message', true, false, {
              action: action,
              data: data,
              sync: true
            });
            request.dispatchEvent(sender);
            var response = sender.detail.response;
            document.documentElement.removeChild(request);
            return response;
          },
          /**
           * Creates an event that the extension is listening for and will
           * asynchronously respond by calling the callback.
           * @param {String} action The action to trigger.
           * @param {String} data Optional data to send.
           * @param {Function} callback Optional response callback that will be called
           * with one data argument.
           */
          request: function (action, data, callback) {
            var request = document.createTextNode('');
            if (callback) {
              document.addEventListener('pdf.js.response', function listener(event) {
                var node = event.target;
                var response = event.detail.response;
                document.documentElement.removeChild(node);
                document.removeEventListener('pdf.js.response', listener, false);
                return callback(response);
              }, false);
            }
            document.documentElement.appendChild(request);
            var sender = document.createEvent('CustomEvent');
            sender.initCustomEvent('pdf.js.message', true, false, {
              action: action,
              data: data,
              sync: false,
              responseExpected: !!callback
            });
            return request.dispatchEvent(sender);
          }
        };
      }();
      var DownloadManager = function DownloadManagerClosure() {
        function DownloadManager() {
        }
        DownloadManager.prototype = {
          downloadUrl: function DownloadManager_downloadUrl(url, filename) {
            FirefoxCom.request('download', {
              originalUrl: url,
              filename: filename
            });
          },
          downloadData: function DownloadManager_downloadData(data, filename, contentType) {
            var blobUrl = pdfjsLib.createObjectURL(data, contentType, false);
            FirefoxCom.request('download', {
              blobUrl: blobUrl,
              originalUrl: blobUrl,
              filename: filename,
              isAttachment: true
            });
          },
          download: function DownloadManager_download(blob, url, filename) {
            var blobUrl = window.URL.createObjectURL(blob);
            FirefoxCom.request('download', {
              blobUrl: blobUrl,
              originalUrl: url,
              filename: filename
            }, function response(err) {
              if (err && this.onerror) {
                this.onerror(err);
              }
              window.URL.revokeObjectURL(blobUrl);
            }.bind(this));
          }
        };
        return DownloadManager;
      }();
      Preferences._writeToStorage = function (prefObj) {
        return new Promise(function (resolve) {
          FirefoxCom.request('setPreferences', prefObj, resolve);
        });
      };
      Preferences._readFromStorage = function (prefObj) {
        return new Promise(function (resolve) {
          FirefoxCom.request('getPreferences', prefObj, function (prefStr) {
            var readPrefs = JSON.parse(prefStr);
            resolve(readPrefs);
          });
        });
      };
      (function listenFindEvents() {
        var events = [
          'find',
          'findagain',
          'findhighlightallchange',
          'findcasesensitivitychange'
        ];
        var handleEvent = function (evt) {
          if (!PDFViewerApplication.initialized) {
            return;
          }
          PDFViewerApplication.eventBus.dispatch('find', {
            source: window,
            type: evt.type.substring('find'.length),
            query: evt.detail.query,
            phraseSearch: true,
            caseSensitive: !!evt.detail.caseSensitive,
            highlightAll: !!evt.detail.highlightAll,
            findPrevious: !!evt.detail.findPrevious
          });
        }.bind(this);
        for (var i = 0, len = events.length; i < len; i++) {
          window.addEventListener(events[i], handleEvent);
        }
      }());
      function FirefoxComDataRangeTransport(length, initialData) {
        pdfjsLib.PDFDataRangeTransport.call(this, length, initialData);
      }
      FirefoxComDataRangeTransport.prototype = Object.create(pdfjsLib.PDFDataRangeTransport.prototype);
      FirefoxComDataRangeTransport.prototype.requestDataRange = function FirefoxComDataRangeTransport_requestDataRange(begin, end) {
        FirefoxCom.request('requestDataRange', {
          begin: begin,
          end: end
        });
      };
      FirefoxComDataRangeTransport.prototype.abort = function FirefoxComDataRangeTransport_abort() {
        // Sync call to ensure abort is really started.
        FirefoxCom.requestSync('abortLoading', null);
      };
      PDFViewerApplication.externalServices = {
        updateFindControlState: function (data) {
          FirefoxCom.request('updateFindControlState', data);
        },
        initPassiveLoading: function (callbacks) {
          var pdfDataRangeTransport;
          window.addEventListener('message', function windowMessage(e) {
            if (e.source !== null) {
              // The message MUST originate from Chrome code.
              console.warn('Rejected untrusted message from ' + e.origin);
              return;
            }
            var args = e.data;
            if (typeof args !== 'object' || !('pdfjsLoadAction' in args)) {
              return;
            }
            switch (args.pdfjsLoadAction) {
            case 'supportsRangedLoading':
              pdfDataRangeTransport = new FirefoxComDataRangeTransport(args.length, args.data);
              callbacks.onOpenWithTransport(args.pdfUrl, args.length, pdfDataRangeTransport);
              break;
            case 'range':
              pdfDataRangeTransport.onDataRange(args.begin, args.chunk);
              break;
            case 'rangeProgress':
              pdfDataRangeTransport.onDataProgress(args.loaded);
              break;
            case 'progressiveRead':
              pdfDataRangeTransport.onDataProgressiveRead(args.chunk);
              break;
            case 'progress':
              callbacks.onProgress(args.loaded, args.total);
              break;
            case 'complete':
              if (!args.data) {
                callbacks.onError(args.errorCode);
                break;
              }
              callbacks.onOpenWithData(args.data);
              break;
            }
          });
          FirefoxCom.requestSync('initPassiveLoading', null);
        },
        fallback: function (data, callback) {
          FirefoxCom.request('fallback', data, callback);
        },
        reportTelemetry: function (data) {
          FirefoxCom.request('reportTelemetry', JSON.stringify(data));
        },
        createDownloadManager: function () {
          return new DownloadManager();
        },
        get supportsIntegratedFind() {
          var support = FirefoxCom.requestSync('supportsIntegratedFind');
          return pdfjsLib.shadow(this, 'supportsIntegratedFind', support);
        },
        get supportsDocumentFonts() {
          var support = FirefoxCom.requestSync('supportsDocumentFonts');
          return pdfjsLib.shadow(this, 'supportsDocumentFonts', support);
        },
        get supportsDocumentColors() {
          var support = FirefoxCom.requestSync('supportsDocumentColors');
          return pdfjsLib.shadow(this, 'supportsDocumentColors', support);
        },
        get supportedMouseWheelZoomModifierKeys() {
          var support = FirefoxCom.requestSync('supportedMouseWheelZoomModifierKeys');
          return pdfjsLib.shadow(this, 'supportedMouseWheelZoomModifierKeys', support);
        }
      };
      //// l10n.js for Firefox extension expects services to be set.
      document.mozL10n.setExternalLocalizerServices({
        getLocale: function () {
          return FirefoxCom.requestSync('getLocale', null);
        },
        getStrings: function (key) {
          return FirefoxCom.requestSync('getStrings', key);
        }
      });
      exports.DownloadManager = DownloadManager;
      exports.FirefoxCom = FirefoxCom;
    }));
  }.call(pdfjsWebLibs));
}
{
  // FIXME the l10n.js file in the Firefox extension needs global FirefoxCom.
  window.FirefoxCom = pdfjsWebLibs.pdfjsWebFirefoxCom.FirefoxCom;
}
function getViewerConfiguration() {
  return {
    appContainer: document.body,
    mainContainer: document.getElementById('viewerContainer'),
    viewerContainer: document.getElementById('viewer'),
    eventBus: null,
    // using global event bus with DOM events
    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'),
      firstPage: document.getElementById('firstPage'),
      lastPage: document.getElementById('lastPage'),
      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'),
      toggleHandToolButton: document.getElementById('toggleHandTool'),
      documentPropertiesButton: document.getElementById('documentProperties')
    },
    fullscreen: {
      contextFirstPage: document.getElementById('contextFirstPage'),
      contextLastPage: document.getElementById('contextLastPage'),
      contextPageRotateCw: document.getElementById('contextPageRotateCw'),
      contextPageRotateCcw: document.getElementById('contextPageRotateCcw')
    },
    sidebar: {
      // Divs (and sidebar button)
      mainContainer: document.getElementById('mainContainer'),
      outerContainer: document.getElementById('outerContainer'),
      toggleButton: document.getElementById('sidebarToggle'),
      // Buttons
      thumbnailButton: document.getElementById('viewThumbnail'),
      outlineButton: document.getElementById('viewOutline'),
      attachmentsButton: document.getElementById('viewAttachments'),
      // Views
      thumbnailView: document.getElementById('thumbnailView'),
      outlineView: document.getElementById('outlineView'),
      attachmentsView: document.getElementById('attachmentsView')
    },
    findBar: {
      bar: document.getElementById('findbar'),
      toggleButton: document.getElementById('viewFind'),
      findField: document.getElementById('findInput'),
      highlightAllCheckbox: document.getElementById('findHighlightAll'),
      caseSensitiveCheckbox: document.getElementById('findMatchCase'),
      findMsg: document.getElementById('findMsg'),
      findResultsCount: document.getElementById('findResultsCount'),
      findStatusIcon: document.getElementById('findStatusIcon'),
      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')
      }
    },
    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() {
  var config = getViewerConfiguration();
  window.PDFViewerApplication = pdfjsWebLibs.pdfjsWebApp.PDFViewerApplication;
  pdfjsWebLibs.pdfjsWebApp.PDFViewerApplication.run(config);
}
document.addEventListener('DOMContentLoaded', webViewerLoad, true);