calibre-web/cps/static/js/libs/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.
 */
/*globals require, chrome */

'use strict';

//var DEFAULT_URL = 'compressed.tracemonkey-pldi-09.pdf';

  var 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 {
          /* jshint expr:true */
          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();
      this.document.documentElement.classList.add(this.CSS_CLASS_GRABBING);

      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;
      this.element.scrollTop = this.scrollTopStart - yDiff;
      this.element.scrollLeft = this.scrollLeftStart - xDiff;
      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.pdfjsWebMozPrintCallbackPolyfill = {}));
  }
}(this, function (exports) {
  if ('mozPrintCallback' in document.createElement('canvas')) {
    return;
  }

  // Cause positive result on feature-detection:
  HTMLCanvasElement.prototype.mozPrintCallback = undefined;

  var canvases;   // During print task: non-live NodeList of <canvas> elements
  var index;      // Index of <canvas> element that is being processed

  var print = window.print;
  window.print = function print() {
    if (canvases) {
      console.warn('Ignored window.print() because of a pending print job.');
      return;
    }
    try {
      dispatchEvent('beforeprint');
    } finally {
      canvases = document.querySelectorAll('canvas');
      index = -1;
      next();
    }
  };

  function dispatchEvent(eventType) {
    var event = document.createEvent('CustomEvent');
    event.initCustomEvent(eventType, false, false, 'custom');
    window.dispatchEvent(event);
  }

  function next() {
    if (!canvases) {
      return; // Print task cancelled by user (state reset in abort())
    }

    renderProgress();
    if (++index < canvases.length) {
      var canvas = canvases[index];
      if (typeof canvas.mozPrintCallback === 'function') {
        canvas.mozPrintCallback({
          context: canvas.getContext('2d'),
          abort: abort,
          done: next
        });
      } else {
        next();
      }
    } else {
      renderProgress();
      print.call(window);
      setTimeout(abort, 20); // Tidy-up
    }
  }

  function abort() {
    if (canvases) {
      canvases = null;
      renderProgress();
      dispatchEvent('afterprint');
    }
  }

  function renderProgress() {
    var progressContainer = document.getElementById('mozPrintCallback-shim');
    if (canvases && canvases.length) {
      var progress = Math.round(100 * index / canvases.length);
      var progressBar = progressContainer.querySelector('progress');
      var progressPerc = progressContainer.querySelector('.relative-progress');
      progressBar.value = progress;
      progressPerc.textContent = progress + '%';
      progressContainer.removeAttribute('hidden');
      progressContainer.onclick = abort;
    } else {
      progressContainer.setAttribute('hidden', '');
    }
  }

  var hasAttachEvent = !!document.attachEvent;

  window.addEventListener('keydown', function(event) {
    // Intercept Cmd/Ctrl + P in all browsers.
    // Also intercept Cmd/Ctrl + Shift + P in Chrome and Opera
    if (event.keyCode === 80/*P*/ && (event.ctrlKey || event.metaKey) &&
        !event.altKey && (!event.shiftKey || window.chrome || window.opera)) {
      window.print();
      if (hasAttachEvent) {
        // Only attachEvent can cancel Ctrl + P dialog in IE <=10
        // attachEvent is gone in IE11, so the dialog will re-appear in IE11.
        return;
      }
      event.preventDefault();
      if (event.stopImmediatePropagation) {
        event.stopImmediatePropagation();
      } else {
        event.stopPropagation();
      }
      return;
    }
    if (event.keyCode === 27 && canvases) { // Esc
      abort();
    }
  }, true);
  if (hasAttachEvent) {
    document.attachEvent('onkeydown', function(event) {
      event = event || window.event;
      if (event.keyCode === 80/*P*/ && event.ctrlKey) {
        event.keyCode = 0;
        return false;
      }
    });
  }

  if ('onbeforeprint' in window) {
    // Do not propagate before/afterprint events when they are not triggered
    // from within this polyfill. (FF/IE).
    var stopPropagationIfNeeded = function(event) {
      if (event.detail !== 'custom' && event.stopImmediatePropagation) {
        event.stopImmediatePropagation();
      }
    };
    window.addEventListener('beforeprint', stopPropagationIfNeeded, false);
    window.addEventListener('afterprint', stopPropagationIfNeeded, false);
  }
}));


(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.pdfjsWebPDFHistory = {}));
  }
}(this, function (exports) {

  function PDFHistory(options) {
    this.linkService = options.linkService;

    this.initialized = false;
    this.initialDestination = null;
    this.initialBookmark = null;
  }

  PDFHistory.prototype = {
    /**
     * @param {string} fingerprint
     * @param {IPDFLinkService} linkService
     */
    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);

      window.addEventListener('presentationmodechanged', function(e) {
        self.isViewerInPresentationMode = !!e.detail.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, '', document.URL);
      } else {
        window.history.pushState(stateObj, '', document.URL);
      }
    },

    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.pdfjsWebPDFPresentationMode = {}));
  }
}(this, function (exports) {

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 {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;
    var contextMenuItems = options.contextMenuItems || null;

    this.active = false;
    this.args = null;
    this.contextMenuOpen = false;
    this.mouseScrollTimeStamp = 0;
    this.mouseScrollDelta = 0;

    if (contextMenuItems) {
      for (var i = 0, ii = contextMenuItems.length; i < ii; i++) {
        var item = contextMenuItems[i];
        item.element.addEventListener('click', function (handler) {
          this.contextMenuOpen = false;
          handler();
        }.bind(this, item.handler));
      }
    }
  }

  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;
    },

    /**
     * Switches page when the user scrolls (using a scroll wheel or a touchpad)
     * with large enough motion, to prevent accidental page switches.
     * @param {number} delta - The delta value from the mouse event.
     */
    mouseScroll: function PDFPresentationMode_mouseScroll(delta) {
      if (!this.active) {
        return;
      }
      var MOUSE_SCROLL_COOLDOWN_TIME = 50;
      var PAGE_SWITCH_THRESHOLD = 120;
      var PageSwitchDirection = {
        UP: -1,
        DOWN: 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 pageSwitchDirection = (this.mouseScrollDelta > 0) ?
          PageSwitchDirection.UP : PageSwitchDirection.DOWN;
        var page = this.pdfViewer.currentPageNumber;
        this._resetMouseScrollState();

        // If we're at the first/last page, we don't need to do anything.
        if ((page === 1 && pageSwitchDirection === PageSwitchDirection.UP) ||
            (page === this.pdfViewer.pagesCount &&
             pageSwitchDirection === PageSwitchDirection.DOWN)) {
          return;
        }
        this.pdfViewer.currentPageNumber = (page + pageSwitchDirection);
        this.mouseScrollTimeStamp = currentTime;
      }
    },

    get isFullscreen() {
      return !!(document.fullscreenElement ||
                document.mozFullScreen ||
                document.webkitIsFullScreen ||
                document.msFullscreenElement);
    },

    /**
     * @private
     */
    _notifyStateChange: function PDFPresentationMode_notifyStateChange() {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('presentationmodechanged', true, true, {
        active: this.active,
        switchInProgress: !!this.switchInProgress
      });
      window.dispatchEvent(event);
    },

    /**
     * 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
     */
    _addWindowListeners: function PDFPresentationMode_addWindowListeners() {
      this.showControlsBind = this._showControls.bind(this);
      this.mouseDownBind = this._mouseDown.bind(this);
      this.resetMouseScrollStateBind = this._resetMouseScrollState.bind(this);
      this.contextMenuBind = this._contextMenu.bind(this);

      window.addEventListener('mousemove', this.showControlsBind);
      window.addEventListener('mousedown', this.mouseDownBind);
      window.addEventListener('keydown', this.resetMouseScrollStateBind);
      window.addEventListener('contextmenu', this.contextMenuBind);
    },

    /**
     * @private
     */
    _removeWindowListeners:
        function PDFPresentationMode_removeWindowListeners() {
      window.removeEventListener('mousemove', this.showControlsBind);
      window.removeEventListener('mousedown', this.mouseDownBind);
      window.removeEventListener('keydown', this.resetMouseScrollStateBind);
      window.removeEventListener('contextmenu', this.contextMenuBind);

      delete this.showControlsBind;
      delete this.mouseDownBind;
      delete this.resetMouseScrollStateBind;
      delete this.contextMenuBind;
    },

    /**
     * @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);
      window.addEventListener('webkitfullscreenchange',
                              this.fullscreenChangeBind);
      window.addEventListener('MSFullscreenChange', this.fullscreenChangeBind);
    },

    /**
     * @private
     */
    _removeFullscreenChangeListeners:
        function PDFPresentationMode_removeFullscreenChangeListeners() {
      window.removeEventListener('fullscreenchange', this.fullscreenChangeBind);
      window.removeEventListener('mozfullscreenchange',
                                 this.fullscreenChangeBind);
      window.removeEventListener('webkitfullscreenchange',
                              this.fullscreenChangeBind);
      window.removeEventListener('MSFullscreenChange',
                                 this.fullscreenChangeBind);

      delete this.fullscreenChangeBind;
    }
  };

  return PDFPresentationMode;
})();

exports.PDFPresentationMode = PDFPresentationMode;
}));


(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 DEFAULT_PREFERENCES = {
  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,
};


/**
 * 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: Object.create(DEFAULT_PREFERENCES),
  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 =
        this._readFromStorage(DEFAULT_PREFERENCES).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 = Object.create(DEFAULT_PREFERENCES);
      return this._writeToStorage(DEFAULT_PREFERENCES);
    }.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(DEFAULT_PREFERENCES).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 (DEFAULT_PREFERENCES[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 DEFAULT_PREFERENCES[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 = DEFAULT_PREFERENCES[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));
  }
};


Preferences._writeToStorage = function (prefObj) {
  return new Promise(function (resolve) {
    localStorage.setItem('pdfjs.preferences', JSON.stringify(prefObj));
    resolve();
  });
};

Preferences._readFromStorage = function (prefObj) {
  return new Promise(function (resolve) {
    var readPrefs = JSON.parse(localStorage.getItem('pdfjs.preferences'));
    resolve(readPrefs);
  });
};

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);


        localStorage.setItem('database', databaseStr);
        resolve();
      }.bind(this));
    },

    _readFromStorage: function ViewHistory_readFromStorage() {
      return new Promise(function (resolve) {

        resolve(localStorage.getItem('database'));
      });
    },

    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 download(blobUrl, filename) {
    var a = document.createElement('a');
    if (a.click) {
      // Use a.click() if available. Otherwise, Chrome might show
      // "Unsafe JavaScript attempt to initiate a navigation change
      //  for frame with URL" and not open the PDF at all.
      // Supported by (not mentioned = untested):
      // - Firefox 6 - 19 (4- does not support a.click, 5 ignores a.click)
      // - Chrome 19 - 26 (18- does not support a.click)
      // - Opera 9 - 12.15
      // - Internet Explorer 6 - 10
      // - Safari 6 (5.1- does not support a.click)
      a.href = blobUrl;
      a.target = '_parent';
      // Use a.download if available. This increases the likelihood that
      // the file is downloaded instead of opened by another PDF plugin.
      if ('download' in a) {
        a.download = filename;
      }
      // <a> must be in the document for IE and recent Firefox versions.
      // (otherwise .click() is ignored)
      (document.body || document.documentElement).appendChild(a);
      a.click();
      a.parentNode.removeChild(a);
    } else {
      if (window.top === window &&
          blobUrl.split('#')[0] === window.location.href.split('#')[0]) {
        // If _parent == self, then opening an identical URL with different
        // location hash will only cause a navigation, not a download.
        var padCharacter = blobUrl.indexOf('?') === -1 ? '?' : '&';
        blobUrl = blobUrl.replace(/#|$/, padCharacter + '$&');
      }
      window.open(blobUrl, '_parent');
    }
  }

  function DownloadManager() {}

  DownloadManager.prototype = {
    downloadUrl: function DownloadManager_downloadUrl(url, filename) {
      if (!pdfjsLib.isValidUrl(url, true)) {
        return; // restricted/invalid URL
      }

      download(url + '#pdfjs.action=download', filename);
    },

    downloadData: function DownloadManager_downloadData(data, filename,
                                                        contentType) {
      if (navigator.msSaveBlob) { // IE10 and above
        return navigator.msSaveBlob(new Blob([data], { type: contentType }),
                                    filename);
      }

      var blobUrl = pdfjsLib.createObjectURL(data, contentType,
        pdfjsLib.PDFJS.disableCreateObjectURL);
      download(blobUrl, filename);
    },

    download: function DownloadManager_download(blob, url, filename) {
      if (!URL) {
        // URL.createObjectURL is not supported
        this.downloadUrl(url, filename);
        return;
      }

      if (navigator.msSaveBlob) {
        // IE10 / IE11
        if (!navigator.msSaveBlob(blob, filename)) {
          this.downloadUrl(url, filename);
        }
        return;
      }

      var blobUrl = URL.createObjectURL(blob);
      download(blobUrl, filename);
    }
  };

  exports.DownloadManager = DownloadManager;
}));


(function (root, factory) {
  {
    factory((root.pdfjsWebFirefoxCom = {}), root.pdfjsWebPreferences,
      root.pdfjsWebPDFJS);
  }
}(this, function (exports, preferences, pdfjsLib) {
}));


(function (root, factory) {
  {
    factory((root.pdfjsWebPDFAttachmentViewer = {}), root.pdfjsWebPDFJS);
  }
}(this, function (exports, pdfjsLib) {

/**
 * @typedef {Object} PDFAttachmentViewerOptions
 * @property {HTMLDivElement} container - The viewer element.
 * @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.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) {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('attachmentsloaded', true, true, {
        attachmentsCount: attachmentsCount
      });
      this.container.dispatchEvent(event);
    },

    /**
     * @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 DEFAULT_TITLE = '\u2013';

/**
 * @typedef {Object} PDFOutlineViewerOptions
 * @property {HTMLDivElement} container - The viewer element.
 * @property {IPDFLinkService} linkService - The navigation/linking service.
 */

/**
 * @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;
  }

  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) {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('outlineloaded', true, true, {
        outlineCount: outlineCount
      });
      this.container.dispatchEvent(event);
    },

    /**
     * @private
     */
    _bindLink: function PDFOutlineViewer_bindLink(element, item) {
      if (item.url) {
        pdfjsLib.addLinkAttributes(element, { url: item.url });
        return;
      }
      var linkService = this.linkService;
      element.href = linkService.getDestinationHash(item.dest);
      element.onclick = function goToDestination(e) {
        linkService.navigateTo(item.dest);
        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} state - 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 {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.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() {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('sidebarviewchanged', true, true, {
        view: this.visibleView,
      });
      this.outerContainer.dispatchEvent(event);
    },

    /**
     * @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.outlineView.addEventListener('outlineloaded', function(evt) {
        var outlineCount = evt.detail.outlineCount;

        self.outlineButton.disabled = !outlineCount;
        if (!outlineCount && self.active === SidebarView.OUTLINE) {
          self.switchView(SidebarView.THUMBS);
        }
      });

      self.attachmentsView.addEventListener('attachmentsloaded', function(evt) {
        var attachmentsCount = evt.detail.attachmentsCount;

        self.attachmentsButton.disabled = !attachmentsCount;
        if (!attachmentsCount && self.active === SidebarView.ATTACHMENTS) {
          self.switchView(SidebarView.THUMBS);
        }
      });

      // Update the thumbnailViewer, if visible, when exiting presentation mode.
      window.addEventListener('presentationmodechanged', function(evt) {
        if (!evt.detail.active && !evt.detail.switchInProgress &&
            self.isThumbnailViewVisible) {
          self._updateThumbnailViewer();
        }
      });
    },
  };

  return PDFSidebar;
})();

exports.SidebarView = SidebarView;
exports.PDFSidebar = PDFSidebar;
}));


(function (root, factory) {
  {
    factory((root.pdfjsWebTextLayerBuilder = {}), root.pdfjsWebPDFJS);
  }
}(this, function (exports, pdfjsLib) {

/**
 * @typedef {Object} TextLayerBuilderOptions
 * @property {HTMLDivElement} textLayerDiv - The text layer container.
 * @property {number} pageIndex - The page index.
 * @property {PageViewport} viewport - The viewport of the text layer.
 * @property {PDFFindController} findController
 */

/**
 * 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.renderingDone = false;
    this.divContentDone = 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._bindMouse();
  }

  TextLayerBuilder.prototype = {
    _finishRendering: function TextLayerBuilder_finishRendering() {
      this.renderingDone = true;

      var endOfContent = document.createElement('div');
      endOfContent.className = 'endOfContent';
      this.textLayerDiv.appendChild(endOfContent);

      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('textlayerrendered', true, true, {
        pageNumber: this.pageNumber
      });
      this.textLayerDiv.dispatchEvent(event);
    },

    /**
     * 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.divContentDone || this.renderingDone) {
        return;
      }

      if (this.textLayerRenderTask) {
        this.textLayerRenderTask.cancel();
        this.textLayerRenderTask = null;
      }

      this.textDivs = [];
      var textLayerFrag = document.createDocumentFragment();
      this.textLayerRenderTask = pdfjsLib.renderTextLayer({
        textContent: this.textContent,
        container: textLayerFrag,
        viewport: this.viewport,
        textDivs: this.textDivs,
        timeout: timeout
      });
      this.textLayerRenderTask.promise.then(function () {
        this.textLayerDiv.appendChild(textLayerFrag);
        this._finishRendering();
        this.updateMatches();
      }.bind(this), function (reason) {
        // canceled or failed to render text layer -- skipping errors
      });
    },

    setTextContent: function TextLayerBuilder_setTextContent(textContent) {
      if (this.textLayerRenderTask) {
        this.textLayerRenderTask.cancel();
        this.textLayerRenderTask = null;
      }
      this.textContent = textContent;
      this.divContentDone = true;
    },

    convertMatches: function TextLayerBuilder_convertMatches(matches) {
      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 = [];

      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.
        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, end.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.
      this.matches = this.convertMatches(this.findController === null ?
        [] : (this.findController.pageMatches[this.pageIdx] || []));
      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;
      div.addEventListener('mousedown', function (e) {
        var end = div.querySelector('.endOfContent');
        if (!end) {
          return;
        }
        // On non-Firefox browsers, the selection will feel better if the height
        // of the endOfContent div will be adjusted to start at mouse click
        // location -- this will avoid flickering when selections moves up.
        // However it does not work when selection started on empty space.
        var adjustTop = e.target !== div;
        adjustTop = adjustTop && window.getComputedStyle(end).
          getPropertyValue('-moz-user-select') !== 'none';
        if (adjustTop) {
          var divBounds = div.getBoundingClientRect();
          var r = Math.max(0, (e.pageY - divBounds.top) / divBounds.height);
          end.style.top = (r * 100).toFixed(2) + '%';
        }
        end.classList.add('active');
      });
      div.addEventListener('mouseup', function (e) {
        var end = div.querySelector('.endOfContent');
        if (!end) {
          return;
        }
        end.style.top = '';
        end.classList.remove('active');
      });
    },
  };
  return TextLayerBuilder;
})();

/**
 * @constructor
 * @implements IPDFTextLayerFactory
 */
function DefaultTextLayerFactory() {}
DefaultTextLayerFactory.prototype = {
  /**
   * @param {HTMLDivElement} textLayerDiv
   * @param {number} pageIndex
   * @param {PageViewport} viewport
   * @returns {TextLayerBuilder}
   */
  createTextLayerBuilder: function (textLayerDiv, pageIndex, viewport) {
    return new TextLayerBuilder({
      textLayerDiv: textLayerDiv,
      pageIndex: pageIndex,
      viewport: viewport
    });
  }
};

exports.TextLayerBuilder = TextLayerBuilder;
exports.DefaultTextLayerFactory = DefaultTextLayerFactory;
}));


(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);

/**
 * Interface locale settings.
 * @var {string}
 */
PDFJS.locale = (PDFJS.locale === undefined ? navigator.language : PDFJS.locale);

/**
 * 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) { // Possible (extremely rare) errors:
        // URIError "Malformed URI", e.g. for "%AA.pdf"
        // TypeError "null has no properties", e.g. for "%2F.pdf"
      }
    }
  }
  return suggestedFilename || 'document.pdf';
}

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.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;
}));


(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,
      root.pdfjsWebFirefoxCom);
  }
}(this, function (exports, uiUtils, firefoxCom) {

var scrollIntoView = uiUtils.scrollIntoView;
var FirefoxCom = firefoxCom.FirefoxCom;

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.integratedFind = options.integratedFind || false;
    this.findBar = options.findBar || 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');

    var events = [
      'find',
      'findagain',
      'findhighlightallchange',
      'findcasesensitivitychange'
    ];
    this.handleEvent = this.handleEvent.bind(this);

    for (var i = 0, len = events.length; i < len; i++) {
      window.addEventListener(events[i], this.handleEvent);
    }
  }

  PDFFindController.prototype = {
    setFindBar: function PDFFindController_setFindBar(findBar) {
      this.findBar = findBar;
    },

    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.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];
      });
    },

    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 queryLen = query.length;

      if (queryLen === 0) {
        // Do nothing: the matches should be wiped out already.
        return;
      }

      if (!caseSensitive) {
        pageContent = pageContent.toLowerCase();
        query = query.toLowerCase();
      }

      var matches = [];
      var matchIdx = -queryLen;
      while (true) {
        matchIdx = pageContent.indexOf(query, matchIdx + queryLen);
        if (matchIdx === -1) {
          break;
        }
        matches.push(matchIdx);
      }
      this.pageMatches[pageIndex] = matches;
      this.updatePage(pageIndex);
      if (this.resumePageIdx === pageIndex) {
        this.resumePageIdx = null;
        this.nextPageMatch();
      }

      // Update the matches count
      if (matches.length > 0) {
        this.matchCount += matches.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);
    },

    handleEvent: function PDFFindController_handleEvent(e) {
      if (this.state === null || e.type !== 'findagain') {
        this.dirtyMatch = true;
      }
      this.state = e.detail;
      this.updateUIState(FindStates.FIND_PENDING);

      this.firstPagePromise.then(function() {
        this.extractText();

        clearTimeout(this.findTimeout);
        if (e.type === '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.scrollPageIntoView(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;
        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.
     * @param {number} endIdx - end index of the div array for the match.
     */
    updateMatchPosition: function PDFFindController_updateMatchPosition(
        pageIndex, index, elements, beginIdx, endIdx) {
      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.findBar === null) {
        throw new Error('PDFFindController is not initialized with a ' +
          'PDFFindBar instance.');
      }
      this.findBar.updateResultsCount(this.matchCount);
    },

    updateUIState: function PDFFindController_updateUIState(state, previous) {
      if (this.integratedFind) {
        FirefoxCom.request('updateFindControlState',
                           { result: state, findPrevious: previous });
        return;
      }
      if (this.findBar === null) {
        throw new Error('PDFFindController is not initialized with a ' +
                        'PDFFindBar instance.');
      }
      this.findBar.updateUIState(state, previous, this.matchCount);
    }
  };
  return PDFFindController;
})();

exports.FindStates = FindStates;
exports.PDFFindController = PDFFindController;
}));


(function (root, factory) {
  {
    factory((root.pdfjsWebPDFLinkService = {}), root.pdfjsWebUIUtils);
  }
}(this, function (exports, uiUtils) {

var parseQueryString = uiUtils.parseQueryString;

/**
 * Performs navigation functions inside PDF, such as opening specified page,
 * or destination.
 * @class
 * @implements {IPDFLinkService}
 */
var PDFLinkService = (function () {
  /**
   * @constructs PDFLinkService
   */
  function PDFLinkService() {
    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.numPages;
    },

    /**
     * @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 = destRef instanceof Object ?
          self._pagesRefCache[destRef.num + ' ' + destRef.gen + ' R'] :
          (destRef + 1);
        if (pageNumber) {
          if (pageNumber > self.pagesCount) {
            pageNumber = self.pagesCount;
          }
          self.pdfViewer.scrollPageIntoView(pageNumber, 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) {
            var pageNum = pageIndex + 1;
            var cacheKey = destRef.num + ' ' + destRef.gen + ' R';
            self._pagesRefCache[cacheKey] = pageNum;
            goToDestination(destRef);
          });
        }
      };

      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)) {
          return; // invalid destination
        }
        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') {
        return this.getAnchorUrl('#' + escape(dest));
      }
      if (dest instanceof Array) {
        var destRef = dest[0]; // see navigateTo method for dest format
        var pageNumber = destRef instanceof Object ?
          this._pagesRefCache[destRef.num + ' ' + destRef.gen + ' R'] :
          (destRef + 1);
        if (pageNumber) {
          var pdfOpenParams = this.getAnchorUrl('#page=' + pageNumber);
          var destKind = dest[1];
          if (typeof destKind === 'object' && 'name' in destKind &&
              destKind.name === 'XYZ') {
            var scale = (dest[4] || this.pdfViewer.currentScaleValue);
            var scaleNumber = parseFloat(scale);
            if (scaleNumber) {
              scale = scaleNumber * 100;
            }
            pdfOpenParams += '&zoom=' + scale;
            if (dest[2] || dest[3]) {
              pdfOpenParams += ',' + (dest[2] || 0) + ',' + (dest[3] || 0);
            }
          }
          return pdfOpenParams;
        }
      }
      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) {
      if (hash.indexOf('=') >= 0) {
        var params = parseQueryString(hash);
        // 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;
        }
        var pageNumber, dest;
        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 || this.page, dest);
        } else if (pageNumber) {
          this.page = pageNumber; // simple page
        }
        if ('pagemode' in params) {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('pagemode', true, true, {
            mode: params.pagemode,
          });
          this.pdfViewer.container.dispatchEvent(event);
        }
      } else if (/^\d+$/.test(hash)) { // page number
        this.page = hash;
      } else { // named destination
        if (this.pdfHistory) {
          this.pdfHistory.updateNextHashParam(unescape(hash));
        }
        this.navigateTo(unescape(hash));
      }
    },

    /**
     * @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':
          this.page++;
          break;

        case 'PrevPage':
          this.page--;
          break;

        case 'LastPage':
          this.page = this.pagesCount;
          break;

        case 'FirstPage':
          this.page = 1;
          break;

        default:
          break; // No action according to spec
      }

      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('namedaction', true, true, {
        action: action
      });
      this.pdfViewer.container.dispatchEvent(event);
    },

    /**
     * @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;
    }
  };

  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.pdfjsWebPDFJS);
  }
}(this, function (exports, uiUtils, pdfRenderingQueue, 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 {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
 */

/**
 * @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;

    this.id = id;
    this.renderingId = 'page' + id;

    this.rotation = 0;
    this.scale = scale || DEFAULT_SCALE;
    this.viewport = defaultViewport;
    this.pdfPageRotate = defaultViewport.rotation;
    this.hasRestrictedScaling = false;

    this.renderingQueue = renderingQueue;
    this.textLayerFactory = textLayerFactory;
    this.annotationLayerFactory = annotationLayerFactory;

    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) {
      if (this.renderTask) {
        this.renderTask.cancel();
      }
      this.resume = null;
      this.renderingState = RenderingStates.INITIAL;

      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;
        var pixelsInViewport = this.viewport.width * this.viewport.height;
        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);

          var event = document.createEvent('CustomEvent');
          event.initCustomEvent('pagerendered', true, true, {
            pageNumber: this.id,
            cssTransform: true,
          });
          this.div.dispatchEvent(event);

          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);
    },

    /**
     * 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.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.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;

          div.removeChild(self.zoomLayer);
          self.zoomLayer = null;
        }

        self.error = error;
        self.stats = pdfPage.stats;
        if (self.onAfterDraw) {
          self.onAfterDraw();
        }
        var event = document.createEvent('CustomEvent');
        event.initCustomEvent('pagerendered', true, true, {
          pageNumber: self.id,
          cssTransform: false,
        });
        div.dispatchEvent(event);

        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,
        // 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.annotationLayer.render(this.viewport, 'display');
      }
      div.setAttribute('data-loaded', true);

      if (self.onBeforeDraw) {
        self.onBeforeDraw();
      }
      return promise;
    },

    beforePrint: function PDFPageView_beforePrint(printContainer) {
      var CustomStyle = pdfjsLib.CustomStyle;
      var pdfPage = this.pdfPage;

      var viewport = pdfPage.getViewport(1);
      // Use the same hack we use for high dpi displays for printing to get
      // better output until bug 811002 is fixed in FF.
      var PRINT_OUTPUT_SCALE = 2;
      var canvas = document.createElement('canvas');

      // The logical size of the canvas.
      canvas.width = Math.floor(viewport.width) * PRINT_OUTPUT_SCALE;
      canvas.height = Math.floor(viewport.height) * PRINT_OUTPUT_SCALE;

      // The rendered size of the canvas, relative to the size of canvasWrapper.
      canvas.style.width = (PRINT_OUTPUT_SCALE * 100) + '%';

      var cssScale = 'scale(' + (1 / PRINT_OUTPUT_SCALE) + ', ' +
                                (1 / PRINT_OUTPUT_SCALE) + ')';
      CustomStyle.setProp('transform' , canvas, cssScale);
      CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');

      var canvasWrapper = document.createElement('div');
      canvasWrapper.appendChild(canvas);
      printContainer.appendChild(canvasWrapper);

      canvas.mozPrintCallback = function(obj) {
        var ctx = obj.context;

        ctx.save();
        ctx.fillStyle = 'rgb(255, 255, 255)';
        ctx.fillRect(0, 0, canvas.width, canvas.height);
        ctx.restore();
        // Used by the mozCurrentTransform polyfill in src/display/canvas.js.
        ctx._transformMatrix =
          [PRINT_OUTPUT_SCALE, 0, 0, PRINT_OUTPUT_SCALE, 0, 0];
        ctx.scale(PRINT_OUTPUT_SCALE, PRINT_OUTPUT_SCALE);

        var renderContext = {
          canvasContext: ctx,
          viewport: viewport,
          intent: 'print'
        };

        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 proces stop.
          if ('abort' in obj) {
            obj.abort();
          } else {
            obj.done();
          }
        });
      };
    },
  };

  return PDFPageView;
})();

exports.PDFPageView = PDFPageView;
}));


(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;

    // Since this is a temporary canvas, we need to fill the canvas with a white
    // background ourselves. `_getPageDrawContext` uses CSS rules for this.
    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.pdfPage = null;
    this.rotation = 0;
    this.viewport = defaultViewport;
    this.pdfPageRotate = defaultViewport.rotation;

    this.linkService = linkService;
    this.renderingQueue = renderingQueue;

    this.resume = null;
    this.renderingState = RenderingStates.INITIAL;
    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;
    };

    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() {
      if (this.renderTask) {
        this.renderTask.cancel();
      }
      this.resume = null;
      this.renderingState = RenderingStates.INITIAL;

      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();
    },

    /**
     * @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.id },
                                  '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();
    }
  };

  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 app; // Avoiding circular reference, see _setApp function below.
var PDFViewerApplication = null; // = app.PDFViewerApplication;

var SecondaryToolbar = {
  opened: false,
  previousContainerHeight: null,
  newContainerHeight: null,

  initialize: function secondaryToolbarInitialize(options) {
    this.toolbar = options.toolbar;
    this.buttonContainer = this.toolbar.firstElementChild;

    // Define the toolbar buttons.
    this.toggleButton = options.toggleButton;
    this.presentationModeButton = options.presentationModeButton;
    this.openFile = options.openFile;
    this.print = options.print;
    this.download = options.download;
    this.viewBookmark = options.viewBookmark;
    this.firstPage = options.firstPage;
    this.lastPage = options.lastPage;
    this.pageRotateCw = options.pageRotateCw;
    this.pageRotateCcw = options.pageRotateCcw;
    this.documentPropertiesButton = options.documentPropertiesButton;

    // Attach the event listeners.
    var elements = [
      // Button to toggle the visibility of the secondary toolbar:
      { element: this.toggleButton, handler: this.toggle },
      // All items within the secondary toolbar
      // (except for toggleHandTool, hand_tool.js is responsible for it):
      { element: this.presentationModeButton,
        handler: this.presentationModeClick },
      { element: this.openFile, handler: this.openFileClick },
      { element: this.print, handler: this.printClick },
      { element: this.download, handler: this.downloadClick },
      { element: this.viewBookmark, handler: this.viewBookmarkClick },
      { element: this.firstPage, handler: this.firstPageClick },
      { element: this.lastPage, handler: this.lastPageClick },
      { element: this.pageRotateCw, handler: this.pageRotateCwClick },
      { element: this.pageRotateCcw, handler: this.pageRotateCcwClick },
      { element: this.documentPropertiesButton,
        handler: this.documentPropertiesClick }
    ];

    for (var item in elements) {
      var element = elements[item].element;
      if (element) {
        element.addEventListener('click', elements[item].handler.bind(this));
      }
    }
  },

  // Event handling functions.
  presentationModeClick: function secondaryToolbarPresentationModeClick(evt) {
    PDFViewerApplication.requestPresentationMode();
    this.close();
  },

  openFileClick: function secondaryToolbarOpenFileClick(evt) {
    var openFileInputName = PDFViewerApplication.appConfig.openFileInputName;
    document.getElementById(openFileInputName).click();
    this.close();
  },

  printClick: function secondaryToolbarPrintClick(evt) {
    window.print();
    this.close();
  },

  downloadClick: function secondaryToolbarDownloadClick(evt) {
    PDFViewerApplication.download();
    this.close();
  },

  viewBookmarkClick: function secondaryToolbarViewBookmarkClick(evt) {
    this.close();
  },

  firstPageClick: function secondaryToolbarFirstPageClick(evt) {
    PDFViewerApplication.page = 1;
    this.close();
  },

  lastPageClick: function secondaryToolbarLastPageClick(evt) {
    if (PDFViewerApplication.pdfDocument) {
      PDFViewerApplication.page = PDFViewerApplication.pagesCount;
    }
    this.close();
  },

  pageRotateCwClick: function secondaryToolbarPageRotateCwClick(evt) {
    PDFViewerApplication.rotatePages(90);
  },

  pageRotateCcwClick: function secondaryToolbarPageRotateCcwClick(evt) {
    PDFViewerApplication.rotatePages(-90);
  },

  documentPropertiesClick: function secondaryToolbarDocumentPropsClick(evt) {
    PDFViewerApplication.pdfDocumentProperties.open();
    this.close();
  },

  // Misc. functions for interacting with the toolbar.
  setMaxHeight: function secondaryToolbarSetMaxHeight(container) {
    if (!container || !this.buttonContainer) {
      return;
    }
    this.newContainerHeight = container.clientHeight;
    if (this.previousContainerHeight === this.newContainerHeight) {
      return;
    }
    this.buttonContainer.setAttribute('style',
      'max-height: ' + (this.newContainerHeight - SCROLLBAR_PADDING) + 'px;');
    this.previousContainerHeight = this.newContainerHeight;
  },

  open: function secondaryToolbarOpen() {
    if (this.opened) {
      return;
    }
    this.opened = true;
    this.toggleButton.classList.add('toggled');
    this.toolbar.classList.remove('hidden');
  },

  close: function secondaryToolbarClose(target) {
    if (!this.opened) {
      return;
    } else if (target && !this.toolbar.contains(target)) {
      return;
    }
    this.opened = false;
    this.toolbar.classList.add('hidden');
    this.toggleButton.classList.remove('toggled');
  },

  toggle: function secondaryToolbarToggle() {
    if (this.opened) {
      this.close();
    } else {
      this.open();
    }
  }
};

function _setApp(app_) {
  app = app_;
  PDFViewerApplication = app.PDFViewerApplication;
}

exports.SecondaryToolbar = SecondaryToolbar;
exports._setApp = _setApp;
}));


(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 {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.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,
          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
   * @returns {AnnotationLayerBuilder}
   */
  createAnnotationLayerBuilder: function (pageDiv, pdfPage) {
    return new AnnotationLayerBuilder({
      pageDiv: pageDiv,
      pdfPage: pdfPage,
      linkService: new SimpleLinkService(),
    });
  }
};

exports.AnnotationLayerBuilder = AnnotationLayerBuilder;
exports.DefaultAnnotationLayerFactory = DefaultAnnotationLayerFactory;
}));


(function (root, factory) {
  {
    factory((root.pdfjsWebHandTool = {}), root.pdfjsWebUIUtils,
      root.pdfjsWebGrabToPan, root.pdfjsWebPreferences,
      root.pdfjsWebSecondaryToolbar);
  }
}(this, function (exports, uiUtils, grabToPan, preferences, secondaryToolbar) {

var mozL10n = uiUtils.mozL10n;
var GrabToPan = grabToPan.GrabToPan;
var Preferences = preferences.Preferences;
var SecondaryToolbar = secondaryToolbar.SecondaryToolbar;

/**
 * @typedef {Object} HandToolOptions
 * @property {HTMLDivElement} container - The document container.
 * @property {HTMLButtonElement} toggleHandTool - The button element for
 *                                                toggling the hand tool.
 */

/**
 * @class
 */
var HandTool = (function HandToolClosure() {
  /**
   * @constructs HandTool
   * @param {HandToolOptions} options
   */
  function HandTool(options) {
    this.container = options.container;
    this.toggleHandTool = options.toggleHandTool;

    this.wasActive = false;

    this.handTool = new GrabToPan({
      element: this.container,
      onActiveChanged: function(isActive) {
        if (!this.toggleHandTool) {
          return;
        }
        if (isActive) {
          this.toggleHandTool.title =
            mozL10n.get('hand_tool_disable.title', null, 'Disable hand tool');
          this.toggleHandTool.firstElementChild.textContent =
            mozL10n.get('hand_tool_disable_label', null, 'Disable hand tool');
        } else {
          this.toggleHandTool.title =
            mozL10n.get('hand_tool_enable.title', null, 'Enable hand tool');
          this.toggleHandTool.firstElementChild.textContent =
            mozL10n.get('hand_tool_enable_label', null, 'Enable hand tool');
        }
      }.bind(this)
    });

    if (this.toggleHandTool) {
      this.toggleHandTool.addEventListener('click', this.toggle.bind(this));

      window.addEventListener('localized', function (evt) {
        Preferences.get('enableHandToolOnLoad').then(function resolved(value) {
          if (value) {
            this.handTool.activate();
          }
        }.bind(this), function rejected(reason) {});
      }.bind(this));

      window.addEventListener('presentationmodechanged', function (evt) {
        if (evt.detail.switchInProgress) {
          return;
        }
        if (evt.detail.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();
      SecondaryToolbar.close();
    },

    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.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;

    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) {
      var event = document.createEvent('CustomEvent');
      event.initCustomEvent('find' + type, true, true, {
        query: this.findField.value,
        caseSensitive: this.caseSensitive.checked,
        highlightAll: this.highlightAll.checked,
        findPrevious: findPrev
      });
      return window.dispatchEvent(event);
    },

    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.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._pagesRotation = 0;
      this._pagesRequests = [];
    },

    setDocument: function PDFThumbnailViewer_setDocument(pdfDocument) {
      if (this.pdfDocument) {
        // cleanup of the elements and views
        var thumbsView = this.container;
        while (thumbsView.hasChildNodes()) {
          thumbsView.removeChild(thumbsView.lastChild);
        }
        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));
    },

    /**
     * @param {PDFPageView} pageView
     * @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.pdfjsWebPDFViewer = {}), root.pdfjsWebUIUtils,
      root.pdfjsWebPDFPageView, root.pdfjsWebPDFRenderingQueue,
      root.pdfjsWebTextLayerBuilder, root.pdfjsWebAnnotationLayerBuilder,
      root.pdfjsWebPDFLinkService, root.pdfjsWebPDFJS);
  }
}(this, function (exports, uiUtils, pdfPageView, pdfRenderingQueue,
                  textLayerBuilder, annotationLayerBuilder, pdfLinkService,
                  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 {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.
 */

/**
 * 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.linkService = options.linkService || new SimpleLinkService();
    this.downloadManager = options.downloadManager || null;
    this.removePageBorders = options.removePageBorders || 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.updateInProgress = false;
    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];
    },

    get currentPageNumber() {
      return this._currentPageNumber;
    },

    set currentPageNumber(val) {
      if (!this.pdfDocument) {
        this._currentPageNumber = val;
        return;
      }

      var event = document.createEvent('UIEvents');
      event.initUIEvent('pagechange', true, true, window, 0);
      event.updateInProgress = this.updateInProgress;

      if (!(0 < val && val <= this.pagesCount)) {
        event.pageNumber = this._currentPageNumber;
        event.previousPageNumber = val;
        this.container.dispatchEvent(event);
        return;
      }

      event.previousPageNumber = this._currentPageNumber;
      this._currentPageNumber = val;
      event.pageNumber = val;
      this.container.dispatchEvent(event);

      // Check if the caller is `PDFViewer_update`, to avoid breaking scrolling.
      if (this.updateInProgress) {
        return;
      }
      this.scrollPageIntoView(val);
    },

    /**
     * @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;
        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) {
      this._pagesRotation = rotation;

      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._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 () {
        var event = document.createEvent('CustomEvent');
        event.initCustomEvent('pagesloaded', true, true, {
          pagesCount: pagesCount
        });
        self.container.dispatchEvent(event);
      });

      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);
        };
        // when page is painted, using the image as thumbnail base
        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,
            id: pageNum,
            scale: scale,
            defaultViewport: viewport.clone(),
            renderingQueue: this.renderingQueue,
            textLayerFactory: textLayerFactory,
            annotationLayerFactory: this
          });
          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();
          }
        });

        var event = document.createEvent('CustomEvent');
        event.initCustomEvent('pagesinit', true, true, null);
        self.container.dispatchEvent(event);

        if (this.defaultRenderingQueue) {
          this.update();
        }

        if (this.findController) {
          this.findController.resolveFirstPage();
        }
      }.bind(this));
    },

    _resetView: function () {
      this._pages = [];
      this._currentPageNumber = 1;
      this._currentScale = UNKNOWN_SCALE;
      this._currentScaleValue = null;
      this._buffer = new PDFPageViewBuffer(DEFAULT_CACHE_SIZE);
      this._location = null;
      this._pagesRotation = 0;
      this._pagesRequests = [];

      var container = this.viewer;
      while (container.hasChildNodes()) {
        container.removeChild(container.lastChild);
      }
    },

    _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 event = document.createEvent('UIEvents');
      event.initUIEvent('scalechange', true, true, window, 0);
      event.scale = newScale;
      if (preset) {
        event.presetValue = newValue;
      }
      this.container.dispatchEvent(event);
    },

    _setScaleUpdatePages: function pdfViewer_setScaleUpdatePages(
        newScale, newValue, noScroll, preset) {
      this._currentScaleValue = newValue;

      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(page, dest);
      }

      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('pdfViewSetScale: \'' + value +
              '\' is an unknown zoom value.');
            return;
        }
        this._setScaleUpdatePages(scale, value, noScroll, true);
      }
    },

    /**
     * Scrolls page into view.
     * @param {number} pageNumber
     * @param {Array} dest - (optional) original PDF destination array:
     *   <page-ref> </XYZ|FitXXX> <args..>
     */
    scrollPageIntoView: function PDFViewer_scrollPageIntoView(pageNumber,
                                                              dest) {
      if (!this.pdfDocument) {
        return;
      }

      var pageView = this._pages[pageNumber - 1];

      if (this.isInPresentationMode) {
        if (this._currentPageNumber !== pageView.id) {
          // Avoid breaking getVisiblePages in presentation mode.
          this.currentPageNumber = pageView.id;
          return;
        }
        dest = null;
        // Fixes the case when PDF has different page sizes.
        this._setScale(this._currentScaleValue, true);
      }
      if (!dest) {
        scrollIntoView(pageView.div);
        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:
          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]);

      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;
      }

      this.updateInProgress = true;

      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.currentPageNumber = currentId;
      }

      this._updateLocation(firstPage);

      this.updateInProgress = false;

      var event = document.createEvent('UIEvents');
      event.initUIEvent('updateviewarea', true, true, window, 0);
      event.location = this._location;
      this.container.dispatchEvent(event);
    },

    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();
        }
      }
    },

    /**
     * @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) {
      return new TextLayerBuilder({
        textLayerDiv: textLayerDiv,
        pageIndex: pageIndex,
        viewport: viewport,
        findController: this.isInPresentationMode ? null : this.findController
      });
    },

    /**
     * @param {HTMLDivElement} pageDiv
     * @param {PDFPage} pdfPage
     * @returns {AnnotationLayerBuilder}
     */
    createAnnotationLayerBuilder: function (pageDiv, pdfPage) {
      return new AnnotationLayerBuilder({
        pageDiv: pageDiv,
        pdfPage: pdfPage,
        linkService: this.linkService,
        downloadManager: this.downloadManager
      });
    },

    setFindController: function (findController) {
      this.findController = findController;
    },
  };

  return PDFViewer;
})();

exports.PresentationModeState = PresentationModeState;
exports.PDFViewer = PDFViewer;
}));


(function (root, factory) {
  {
    factory((root.pdfjsWebApp = {}), root.pdfjsWebUIUtils,
      root.pdfjsWebFirefoxCom, 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.pdfjsWebMozPrintCallbackPolyfill, root.pdfjsWebPDFJS);
  }
}(this, function (exports, uiUtilsLib, firefoxComLib, downloadManagerLib,
                  pdfHistoryLib, preferencesLib, pdfSidebarLib, viewHistoryLib,
                  pdfThumbnailViewerLib, secondaryToolbarLib, passwordPromptLib,
                  pdfPresentationModeLib, pdfDocumentPropertiesLib, handToolLib,
                  pdfViewerLib, pdfRenderingQueueLib, pdfLinkServiceLib,
                  pdfOutlineViewerLib, overlayManagerLib,
                  pdfAttachmentViewerLib, pdfFindControllerLib, pdfFindBarLib,
                  mozPrintCallbackPolyfillLib, pdfjsLib) {

var FirefoxCom = firefoxComLib.FirefoxCom;
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 DownloadManager = downloadManagerLib.DownloadManager ||
                      firefoxComLib.DownloadManager;
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 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 = PDFWORKER_LOCATION;
  PDFJS.cMapUrl = '../web/cmaps/';
  PDFJS.cMapPacked = true;
}

var PDFViewerApplication = {
  initialBookmark: document.location.hash.substring(1),
  initialDestination: null,
  initialized: false,
  fellback: false,
  appConfig: null,
  pdfDocument: null,
  pdfLoadingTask: null,
  printing: false,
  /** @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,
  pageRotation: 0,
  isInitialViewSet: false,
  animationStartedPromise: null,
  preferenceSidebarViewOnLoad: SidebarView.NONE,
  preferencePdfBugEnabled: false,
  preferenceShowPreviousViewOnLoad: true,
  preferenceDefaultZoomValue: '',
  isViewerEmbedded: (window.parent !== window),
  url: '',

  // called once when the document is loaded
  initialize: function pdfViewInitialize(appConfig) {
    configure(pdfjsLib.PDFJS);
    this.appConfig = appConfig;

    var pdfRenderingQueue = new PDFRenderingQueue();
    pdfRenderingQueue.onIdle = this.cleanup.bind(this);
    this.pdfRenderingQueue = pdfRenderingQueue;

    var pdfLinkService = new PDFLinkService();
    this.pdfLinkService = pdfLinkService;

    var container = appConfig.mainContainer;
    var viewer = appConfig.viewerContainer;
    this.pdfViewer = new PDFViewer({
      container: container,
      viewer: viewer,
      renderingQueue: pdfRenderingQueue,
      linkService: pdfLinkService,
      downloadManager: new DownloadManager()
    });
    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
    });
    pdfLinkService.setHistory(this.pdfHistory);

    this.findController = new PDFFindController({
      pdfViewer: this.pdfViewer,
      integratedFind: this.supportsIntegratedFind
    });
    this.pdfViewer.setFindController(this.findController);

    // FIXME better PDFFindBar constructor parameters
    var findBarConfig = Object.create(appConfig.findBar);
    findBarConfig.findController = this.findController;
    this.findBar = new PDFFindBar(findBarConfig);

    this.findController.setFindBar(this.findBar);

    this.overlayManager = OverlayManager;

    this.handTool = new HandTool({
      container: container,
      toggleHandTool: appConfig.secondaryToolbar.toggleHandTool
    });

    this.pdfDocumentProperties =
      new PDFDocumentProperties(appConfig.documentProperties);

    SecondaryToolbar.initialize(appConfig.secondaryToolbar);
    this.secondaryToolbar = SecondaryToolbar;

    if (this.supportsFullscreen) {
      var toolbar = SecondaryToolbar;
      this.pdfPresentationMode = new PDFPresentationMode({
        container: container,
        viewer: viewer,
        pdfViewer: this.pdfViewer,
        contextMenuItems: [
          { element: appConfig.fullscreen.contextFirstPage,
            handler: toolbar.firstPageClick.bind(toolbar) },
          { element: appConfig.fullscreen.contextLastPage,
            handler: toolbar.lastPageClick.bind(toolbar) },
          { element: appConfig.fullscreen.contextPageRotateCw,
            handler: toolbar.pageRotateCwClick.bind(toolbar) },
          { element: appConfig.fullscreen.contextPageRotateCcw,
            handler: toolbar.pageRotateCcwClick.bind(toolbar) }
        ]
      });
    }

    this.passwordPrompt = new PasswordPrompt(appConfig.passwordOverlay);

    this.pdfOutlineViewer = new PDFOutlineViewer({
      container: appConfig.sidebar.outlineView,
      linkService: pdfLinkService,
    });

    this.pdfAttachmentViewer = new PDFAttachmentViewer({
      container: appConfig.sidebar.attachmentsView,
      downloadManager: new DownloadManager(),
    });

    // FIXME better PDFSidebar constructor parameters
    var sidebarConfig = Object.create(appConfig.sidebar);
    sidebarConfig.pdfViewer = this.pdfViewer;
    sidebarConfig.pdfThumbnailViewer = this.pdfThumbnailViewer;
    sidebarConfig.pdfOutlineViewer = this.pdfOutlineViewer;
    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('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;
      }),
      // TODO move more preferences and other async stuff here
    ]).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.numPages;
  },

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

  get page() { // TODO remove
    return this.pdfLinkService.page;
  },

  get supportsPrinting() {
    var canvas = document.createElement('canvas');
    var value = 'mozPrintCallback' in canvas;

    return pdfjsLib.shadow(this, 'supportsPrinting', value);
  },

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

    if (document.fullscreenEnabled === false ||
        document.mozFullScreenEnabled === false ||
        document.webkitFullscreenEnabled === false ||
        document.msFullscreenEnabled === false) {
      support = false;
    }
    if (support && pdfjsLib.PDFJS.disableFullscreen === true) {
      support = false;
    }

    return pdfjsLib.shadow(this, 'supportsFullscreen', support);
  },

  get supportsIntegratedFind() {
    var support = false;

    return pdfjsLib.shadow(this, 'supportsIntegratedFind', support);
  },

  get supportsDocumentFonts() {
    var support = true;

    return pdfjsLib.shadow(this, 'supportsDocumentFonts', support);
  },

  get supportsDocumentColors() {
    var support = true;

    return pdfjsLib.shadow(this, 'supportsDocumentColors', support);
  },

  get loadingBar() {
    var bar = new ProgressBar('#loadingBar', {});

    return pdfjsLib.shadow(this, 'loadingBar', bar);
  },

  get supportedMouseWheelZoomModifierKeys() {
    var support = {
      ctrlKey: true,
      metaKey: true,
    };

    return pdfjsLib.shadow(this, 'supportedMouseWheelZoomModifierKeys',
                           support);
  },


  setTitleUsingUrl: function pdfViewSetTitleUsingUrl(url) {
    this.url = url;
    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.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) {
    var scale = 0;
    if (arguments.length > 2 || typeof args === 'number') {
      console.warn('Call of open() with obsolete signature.');
      if (typeof args === 'number') {
        scale = args; // scale argument was found
      }
      args = arguments[4] || null;
      if (arguments[3] && typeof arguments[3] === 'object') {
        // The pdfDataRangeTransport argument is present.
        args = Object.create(args);
        args.range = arguments[3];
      }
      if (typeof arguments[2] === 'string') {
        // The password argument is present.
        args = Object.create(args);
        args.password = arguments[2];
      }
    }

    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);
    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;
    }
    if (args) {
      for (var prop in args) {
        parameters[prop] = args[prop];
      }
    }

    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);

    var result = 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);
      }
    );

    if (args && args.length) {
      PDFViewerApplication.pdfDocumentProperties.setFileSize(args.length);
    }
    return result;
  },

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

    var url = this.url.split('#')[0];
    var filename = getPDFFileNameFromURL(url);
    var downloadManager = new 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 // Error occurred try downloading with just the url.
    ).then(null, downloadByUrl);
  },

  fallback: function pdfViewFallback(featureId) {
  },

  /**
   * 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}}');
        }
      }
    }

    var errorWrapperConfig = this.appConfig.errorWrapper;
    var errorWrapper = errorWrapperConfig.container;
    errorWrapper.removeAttribute('hidden');

    var errorMessage = errorWrapperConfig.errorMessage;
    errorMessage.textContent = message;

    var closeButton = errorWrapperConfig.closeButton;
    closeButton.onclick = function() {
      errorWrapper.setAttribute('hidden', 'true');
    };

    var errorMoreInfo = errorWrapperConfig.errorMoreInfo;
    var moreInfoButton = errorWrapperConfig.moreInfoButton;
    var lessInfoButton = errorWrapperConfig.lessInfoButton;
    moreInfoButton.onclick = function() {
      errorMoreInfo.removeAttribute('hidden');
      moreInfoButton.setAttribute('hidden', 'true');
      lessInfoButton.removeAttribute('hidden');
      errorMoreInfo.style.height = errorMoreInfo.scrollHeight + 'px';
    };
    lessInfoButton.onclick = function() {
      errorMoreInfo.setAttribute('hidden', 'true');
      moreInfoButton.removeAttribute('hidden');
      lessInfoButton.setAttribute('hidden', 'true');
    };
    moreInfoButton.oncontextmenu = noContextMenuHandler;
    lessInfoButton.oncontextmenu = noContextMenuHandler;
    closeButton.oncontextmenu = noContextMenuHandler;
    moreInfoButton.removeAttribute('hidden');
    lessInfoButton.setAttribute('hidden', 'true');
    errorMoreInfo.value = moreInfoText;
  },

  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();
    });

    var pagesCount = pdfDocument.numPages;
    var toolbarConfig = this.appConfig.toolbar;
    toolbarConfig.numPages.textContent =
      mozL10n.get('page_of', {pageCount: pagesCount}, 'of {{pageCount}}');
    toolbarConfig.pageNumber.max = pagesCount;

    var id = this.documentFingerprint = pdfDocument.fingerprint;
    var store = this.store = new ViewHistory(id);

    var baseDocumentUrl = null;
    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;

    this.pdfThumbnailViewer.setDocument(pdfDocument);

    firstPagePromise.then(function(pdfPage) {
      downloadedPromise.then(function () {
        var event = document.createEvent('CustomEvent');
        event.initCustomEvent('documentload', true, true, {});
        window.dispatchEvent(event);
      });

      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);
      });
    });

    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;
            }
          }
        });
      }
    });

    // outline depends on pagesRefMap
    var promises = [pagesPromise, this.animationStartedPromise];
    Promise.all(promises).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);
      }

    });
  },

  setInitialView: function pdfViewSetInitialView(storedHash, options) {
    var scale = options && options.scale;
    var sidebarView = options && options.sidebarView;

    this.isInitialViewSet = true;

    // When opening a new file, when one is already loaded in the viewer,
    // ensure that the 'pageNumber' element displays the correct value.
    this.appConfig.toolbar.pageNumber.value = this.pdfViewer.currentPageNumber;

    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.supportsPrinting) {
      var printMessage = mozL10n.get('printing_not_supported', null,
          'Warning: Printing is not fully supported by this browser.');
      this.error(printMessage);
      return;
    }

    var alertNotReady = false;
    var i, ii;
    if (!this.pdfDocument || !this.pagesCount) {
      alertNotReady = true;
    } else {
      for (i = 0, ii = this.pagesCount; i < ii; ++i) {
        if (!this.pdfViewer.getPageView(i).pdfPage) {
          alertNotReady = true;
          break;
        }
      }
    }
    if (alertNotReady) {
      var notReadyMessage = mozL10n.get('printing_not_ready', null,
          'Warning: The PDF is not fully loaded for printing.');
      window.alert(notReadyMessage);
      return;
    }

    this.printing = true;
    this.forceRendering();

    var printContainer = this.appConfig.printContainer;
    var body = document.querySelector('body');
    body.setAttribute('data-mozPrintCallback', true);

    if (!this.hasEqualPageSizes) {
      console.warn('Not all pages have the same size. The printed result ' +
          'may be incorrect!');
    }

    // Insert a @page + size rule to make sure that the page size is correctly
    // set. Note that we assume that all pages have the same size, because
    // variable-size pages are not supported yet (at least in Chrome & Firefox).
    // TODO(robwu): Use named pages when size calculation bugs get resolved
    // (e.g. https://crbug.com/355116) AND when support for named pages is
    // added (http://www.w3.org/TR/css3-page/#using-named-pages).
    // In browsers where @page + size is not supported (such as Firefox,
    // https://bugzil.la/851441), the next stylesheet will be ignored and the
    // user has to select the correct paper size in the UI if wanted.
    this.pageStyleSheet = document.createElement('style');
    var pageSize = this.pdfViewer.getPageView(0).pdfPage.getViewport(1);
    this.pageStyleSheet.textContent =
      // "size:<width> <height>" is what we need. But also add "A4" because
      // Firefox incorrectly reports support for the other value.
      '@supports ((size:A4) and (size:1pt 1pt)) {' +
      '@page { size: ' + pageSize.width + 'pt ' + pageSize.height + 'pt;}' +
      '}';
    body.appendChild(this.pageStyleSheet);

    for (i = 0, ii = this.pagesCount; i < ii; ++i) {
      this.pdfViewer.getPageView(i).beforePrint(printContainer);
    }

  },

  // 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() {
    var div = this.appConfig.printContainer;
    while (div.hasChildNodes()) {
      div.removeChild(div.lastChild);
    }

    if (this.pageStyleSheet && this.pageStyleSheet.parentNode) {
      this.pageStyleSheet.parentNode.removeChild(this.pageStyleSheet);
      this.pageStyleSheet = null;
    }

    this.printing = false;
    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.scrollPageIntoView(pageNumber);
  },

  requestPresentationMode: function pdfViewRequestPresentationMode() {
    if (!this.pdfPresentationMode) {
      return;
    }
    this.pdfPresentationMode.request();
  },

  /**
   * @param {number} delta - The delta value from the mouse event.
   */
  scrollPresentationMode: function pdfViewScrollPresentationMode(delta) {
    if (!this.pdfPresentationMode) {
      return;
    }
    this.pdfPresentationMode.mouseScroll(delta);
  }
};

var HOSTED_VIEWER_ORIGINS = ['null',
  'http://mozilla.github.io', 'https://mozilla.github.io'];
function validateFileURL(file) {
  try {
    var viewerOrigin = new URL(window.location.href).origin || 'null';
    if (HOSTED_VIEWER_ORIGINS.indexOf(viewerOrigin) >= 0) {
      // Hosted or local viewer, allow for any file locations
      return;
    }
    var fileOrigin = new URL(file, window.location.href).origin;
    // Removing of the following line will not guarantee that the viewer will
    // start accepting URLs from foreign origin -- CORS headers on the remote
    // server must be properly configured.
    if (fileOrigin !== viewerOrigin) {
      throw new Error('file origin does not match viewer\'s');
    }
  } catch (e) {
    var message = e && e.message;
    var loadingErrorMessage = mozL10n.get('loading_error', null,
      'An error occurred while loading the PDF.');

    var moreInfo = {
      message: message
    };
    PDFViewerApplication.error(loadingErrorMessage, moreInfo);
    throw e;
  }
}

function webViewerInitialized() {
  var queryString = document.location.search.substring(1);
  var params = parseQueryString(queryString);
  var file = 'file' in params ? params.file : DEFAULT_URL;
  validateFileURL(file);

  var appConfig = PDFViewerApplication.appConfig;
  var fileInput = document.createElement('input');
  fileInput.id = appConfig.openFileInputName;
  fileInput.className = 'fileInput';
  fileInput.setAttribute('type', 'file');
  fileInput.oncontextmenu = noContextMenuHandler;
  document.body.appendChild(fileInput);

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


  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 ('locale' in hashParams) {
      PDFJS.locale = hashParams['locale'];
    }
    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(',');
      PDFBug.enable(enabled);
      PDFBug.init(pdfjsLib, appConfig.mainContainer);
    }
  }

  mozL10n.setLanguage(PDFJS.locale);

  if (!PDFViewerApplication.supportsPrinting) {
    appConfig.toolbar.print.classList.add('hidden');
    appConfig.secondaryToolbar.print.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) {
        var event = document.createEvent('UIEvents');
        event.initUIEvent('resize', false, false, window, 0);
        window.dispatchEvent(event);
      }
    }, 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() {
    // Handle the user inputting a floating point number.
    PDFViewerApplication.page = (this.value | 0);

    if (this.value !== (this.value | 0).toString()) {
      this.value = PDFViewerApplication.page;
    }
  });

  appConfig.toolbar.scaleSelect.addEventListener('change', function() {
    if (this.value === 'custom') {
      return;
    }
    PDFViewerApplication.pdfViewer.currentScaleValue = this.value;
  });

  appConfig.toolbar.presentationModeButton.addEventListener('click',
    SecondaryToolbar.presentationModeClick.bind(SecondaryToolbar));

  appConfig.toolbar.openFile.addEventListener('click',
    SecondaryToolbar.openFileClick.bind(SecondaryToolbar));

  appConfig.toolbar.print.addEventListener('click',
    SecondaryToolbar.printClick.bind(SecondaryToolbar));

  appConfig.toolbar.download.addEventListener('click',
    SecondaryToolbar.downloadClick.bind(SecondaryToolbar));


  if (file && file.lastIndexOf('file:', 0) === 0) {
    // file:-scheme. Load the contents in the main thread because QtWebKit
    // cannot load file:-URLs in a Web Worker. file:-URLs are usually loaded
    // very quickly, so there is no need to set up progress event listeners.
    PDFViewerApplication.setTitleUsingUrl(file);
    var xhr = new XMLHttpRequest();
    xhr.onload = function() {
      PDFViewerApplication.open(new Uint8Array(xhr.response));
    };
    try {
      xhr.open('GET', file);
      xhr.responseType = 'arraybuffer';
      xhr.send();
    } catch (e) {
      PDFViewerApplication.error(mozL10n.get('loading_error', null,
        'An error occurred while loading the PDF.'), e);
    }
    return;
  }

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

document.addEventListener('pagerendered', function (e) {
  var pageNumber = e.detail.pageNumber;
  var pageIndex = pageNumber - 1;
  var pageView = PDFViewerApplication.pdfViewer.getPageView(pageIndex);

  // 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);
  }

  // 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);
  }

}, true);

document.addEventListener('textlayerrendered', function (e) {
  var pageIndex = e.detail.pageNumber - 1;
  var pageView = PDFViewerApplication.pdfViewer.getPageView(pageIndex);

}, true);

document.addEventListener('pagemode', function (evt) {
  if (!PDFViewerApplication.initialized) {
    return;
  }
  // Handle the 'pagemode' hash parameter, see also `PDFLinkService_setHash`.
  var mode = evt.detail.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);
}, true);

document.addEventListener('namedaction', function (e) {
  if (!PDFViewerApplication.initialized) {
    return;
  }
  // Processing couple of named actions that might be useful.
  // See also PDFLinkService.executeNamedAction
  var action = e.detail.action;
  switch (action) {
    case 'GoToPage':
      PDFViewerApplication.appConfig.toolbar.pageNumber.focus();
      break;

    case 'Find':
      if (!PDFViewerApplication.supportsIntegratedFind) {
        PDFViewerApplication.findBar.toggle();
      }
      break;
  }
}, true);

window.addEventListener('presentationmodechanged', function (e) {
  var active = e.detail.active;
  var switchInProgress = e.detail.switchInProgress;
  PDFViewerApplication.pdfViewer.presentationModeState =
    switchInProgress ? PresentationModeState.CHANGING :
    active ? PresentationModeState.FULLSCREEN : PresentationModeState.NORMAL;
});

window.addEventListener('sidebarviewchanged', function (evt) {
  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', evt.detail.view).catch(function() {});
  });
}, true);

window.addEventListener('updateviewarea', function (evt) {
  if (!PDFViewerApplication.initialized) {
    return;
  }
  var location = evt.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() { /* unable to write to storage */ });
    });
  }
  var href =
    PDFViewerApplication.pdfLinkService.getAnchorUrl(location.pdfOpenParams);
  PDFViewerApplication.appConfig.toolbar.viewBookmark.href = href;
  PDFViewerApplication.appConfig.secondaryToolbar.viewBookmark.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);
  }
}, true);

window.addEventListener('resize', function webViewerResize(evt) {
  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();
  }

  // Set the 'max-height' CSS property of the secondary toolbar.
  SecondaryToolbar.setMaxHeight(PDFViewerApplication.appConfig.mainContainer);
});

window.addEventListener('hashchange', function webViewerHashchange(evt) {
  if (PDFViewerApplication.pdfHistory.isHashChangeUnlocked) {
    var hash = document.location.hash.substring(1);
    if (!hash) {
      return;
    }
    if (!PDFViewerApplication.isInitialViewSet) {
      PDFViewerApplication.initialBookmark = hash;
    } else {
      PDFViewerApplication.pdfLinkService.setHash(hash);
    }
  }
});

window.addEventListener('change', function webViewerChange(evt) {
  var files = evt.target.files;
  if (!files || files.length === 0) {
    return;
  }
  var file = files[0];

  if (!pdfjsLib.PDFJS.disableCreateObjectURL &&
      typeof URL !== 'undefined' && URL.createObjectURL) {
    PDFViewerApplication.open(URL.createObjectURL(file));
  } else {
    // Read the local file into a Uint8Array.
    var fileReader = new FileReader();
    fileReader.onload = function webViewerChangeFileReaderOnload(evt) {
      var buffer = evt.target.result;
      var uint8Array = new Uint8Array(buffer);
      PDFViewerApplication.open(uint8Array);
    };
    fileReader.readAsArrayBuffer(file);
  }

  PDFViewerApplication.setTitleUsingUrl(file.name);

  // URL does not reflect proper document location - hiding some icons.
  var appConfig = PDFViewerApplication.appConfig;
  appConfig.toolbar.viewBookmark.setAttribute('hidden', 'true');
  appConfig.secondaryToolbar.viewBookmark.setAttribute('hidden', 'true');
  appConfig.toolbar.download.setAttribute('hidden', 'true');
  appConfig.secondaryToolbar.download.setAttribute('hidden', 'true');
}, true);

function selectScaleOption(value) {
  var options = PDFViewerApplication.appConfig.toolbar.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;
  }
  return predefinedValueFound;
}

window.addEventListener('localized', function localized(evt) {
  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;');
    }

    // Set the 'max-height' CSS property of the secondary toolbar.
    SecondaryToolbar.setMaxHeight(PDFViewerApplication.appConfig.mainContainer);
  });
}, true);

window.addEventListener('scalechange', function scalechange(evt) {
  var appConfig = PDFViewerApplication.appConfig;
  appConfig.toolbar.zoomOut.disabled = (evt.scale === MIN_SCALE);
  appConfig.toolbar.zoomIn.disabled = (evt.scale === MAX_SCALE);

  // Update the 'scaleSelect' DOM element.
  var predefinedValueFound = selectScaleOption(evt.presetValue ||
                                               '' + evt.scale);
  if (!predefinedValueFound) {
    var customScaleOption = appConfig.toolbar.customScaleOption;
    var customScale = Math.round(evt.scale * 10000) / 100;
    customScaleOption.textContent =
      mozL10n.get('page_scale_percent', { scale: customScale }, '{{scale}}%');
    customScaleOption.selected = true;
  }
  if (!PDFViewerApplication.initialized) {
    return;
  }
  PDFViewerApplication.pdfViewer.update();
}, true);

window.addEventListener('pagechange', function pagechange(evt) {
  var page = evt.pageNumber;
  if (evt.previousPageNumber !== page) {
    PDFViewerApplication.appConfig.toolbar.pageNumber.value = page;

    if (PDFViewerApplication.pdfSidebar.isThumbnailViewVisible) {
      PDFViewerApplication.pdfThumbnailViewer.scrollThumbnailIntoView(page);
    }
  }
  var numPages = PDFViewerApplication.pagesCount;

  PDFViewerApplication.appConfig.toolbar.previous.disabled = (page <= 1);
  PDFViewerApplication.appConfig.toolbar.next.disabled = (page >= numPages);

  PDFViewerApplication.appConfig.toolbar.firstPage.disabled = (page <= 1);
  PDFViewerApplication.appConfig.toolbar.lastPage.disabled = (page >= numPages);

  // 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);
    }
  }
}, true);

var zoomDisabled = false, zoomDisabledTimeout;
function handleMouseWheel(evt) {
  var MOUSE_WHEEL_DELTA_FACTOR = 40;
  var ticks = (evt.type === 'DOMMouseScroll') ? -evt.detail :
              evt.wheelDelta / MOUSE_WHEEL_DELTA_FACTOR;
  var direction = (ticks < 0) ? 'zoomOut' : 'zoomIn';

  var pdfViewer = PDFViewerApplication.pdfViewer;
  if (pdfViewer.isInPresentationMode) {
    evt.preventDefault();
    PDFViewerApplication.scrollPresentationMode(ticks *
                                                MOUSE_WHEEL_DELTA_FACTOR);
  } else 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;

    PDFViewerApplication[direction](Math.abs(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('DOMMouseScroll', handleMouseWheel);
window.addEventListener('mousewheel', handleMouseWheel);

window.addEventListener('click', function click(evt) {
  if (SecondaryToolbar.opened &&
      PDFViewerApplication.pdfViewer.containsElement(evt.target)) {
    SecondaryToolbar.close();
  }
}, false);

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) {
          PDFViewerApplication.findBar.dispatchEvent('again',
                                                     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 or META without shift
  if (cmd === 1 || cmd === 8) {
    switch (evt.keyCode) {
      case 83: // s
        PDFViewerApplication.download();
        handled = true;
        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 */
        /* falls through */
      case 37: // left arrow
        // horizontal scrolling using arrow keys
        if (pdfViewer.isHorizontalScrollbarEnabled) {
          break;
        }
        /* falls through */
      case 75: // 'k'
      case 80: // 'p'
        PDFViewerApplication.page--;
        handled = true;
        break;
      case 27: // esc key
        if (SecondaryToolbar.opened) {
          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;
        }
        /* falls through */
      case 39: // right arrow
        // horizontal scrolling using arrow keys
        if (pdfViewer.isHorizontalScrollbarEnabled) {
          break;
        }
        /* falls through */
      case 74: // 'j'
      case 78: // 'n'
        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.pdfDocument &&
            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;
        }
        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.beforePrint();
});

window.addEventListener('afterprint', function afterPrint(evt) {
  PDFViewerApplication.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);
  });
})();

exports.PDFViewerApplication = PDFViewerApplication;

// TODO remove circular reference of pdfjs-web/secondary_toolbar on app.
secondaryToolbarLib._setApp(exports);

}));

  }).call(pdfjsWebLibs);



function getViewerConfiguration() {
  return {
    appContainer: document.body,
    mainContainer: document.getElementById('viewerContainer'),
    viewerContainer:  document.getElementById('viewer'),
    toolbar: {
      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'),
      presentationModeButton:
        document.getElementById('secondaryPresentationMode'),
      openFile: document.getElementById('secondaryOpenFile'),
      print: document.getElementById('secondaryPrint'),
      download: document.getElementById('secondaryDownload'),
      viewBookmark: document.getElementById('secondaryViewBookmark'),
      firstPage: document.getElementById('firstPage'),
      lastPage: document.getElementById('lastPage'),
      pageRotateCw: document.getElementById('pageRotateCw'),
      pageRotateCcw: document.getElementById('pageRotateCcw'),
      documentPropertiesButton: document.getElementById('documentProperties'),
      toggleHandTool: document.getElementById('toggleHandTool'),
    },
    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',
  };
}

function webViewerLoad() {
  var config = getViewerConfiguration();
  window.PDFViewerApplication = pdfjsWebLibs.pdfjsWebApp.PDFViewerApplication;
  pdfjsWebLibs.pdfjsWebApp.PDFViewerApplication.run(config);
}

document.addEventListener('DOMContentLoaded', webViewerLoad, true);