chrome/browser/resources/pdf/elements/viewer-pdf-toolbar/viewer-pdf-toolbar.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4 (function() {
   5   /**
   6    * @type {Object}
   7    * core-meta object used to determine type of transition used.
   8    */
   9   var meta = document.createElement('core-meta');
  10   meta.type = 'transition';
  11
  12   /**
  13    * @type {Object}
  14    * Sets up, starts and destroys the transition used.
  15    * This has no state and therefore is OK to make global.
  16    */
  17   var transition;
  18
  19   Polymer('viewer-pdf-toolbar', {
  20     /**
  21      * @type {string}
  22      * The title of the PDF document.
  23      */
  24     docTitle: '',
  25
  26     /**
  27      * @type {number}
  28      * The current index of the page being viewed (0-based).
  29      */
  30     pageIndex: 0,
  31
  32     /**
  33      * @type {number}
  34      * The current loading progress of the PDF document (0 - 100).
  35      */
  36     loadProgress: 0,
  37
  38     /**
  39      * @type {boolean}
  40      * Whether the document has bookmarks.
  41      */
  42     hasBookmarks: false,
  43
  44     /**
  45      * @type {number}
  46      * The number of pages in the PDF document.
  47      */
  48     docLength: 1,
  49
  50     ready: function() {
  51       // We cannot initialise transition before ensuring that core-meta has been
  52       // imported.
  53       if (transition === undefined)
  54         transition = meta.byId('core-transition-top');
  55       transition.setup(this.$.animatable);
  56
  57       /**
  58        * @type {Object}
  59        * Used in core-transition to determine whether the animatable is open.
  60        */
  61       this.state_ = { opened: false };
  62       this.show();
  63     },
  64
  65     loadProgressChanged: function() {
  66       if (this.loadProgress >= 100) {
  67         this.$.title.classList.toggle('invisible', false);
  68         this.$.pageselector.classList.toggle('invisible', false);
  69         this.$.buttons.classList.toggle('invisible', false);
  70       }
  71     },
  72
  73     hide: function() {
  74       if (this.state_.opened)
  75         this.toggleVisibility();
  76     },
  77
  78     show: function() {
  79       if (!this.state_.opened)
  80         this.toggleVisibility();
  81     },
  82
  83     toggleVisibility: function() {
  84       this.state_.opened = !this.state_.opened;
  85       transition.go(this.$.animatable, this.state_);
  86     },
  87
  88     selectPageNumber: function() {
  89       this.$.pageselector.select();
  90     },
  91
  92     rotateRight: function() {
  93       this.fire('rotate-right');
  94     },
  95
  96     toggleBookmarks: function() {
  97       this.fire('toggle-bookmarks');
  98     },
  99
 100     save: function() {
 101       this.fire('save');
 102     },
 103
 104     print: function() {
 105       this.fire('print');
 106     }
 107   });
 108 })();