chrome/browser/resources/pdf/elements/viewer-zoom-toolbar/viewer-zoom-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
   5 (function() {
   6
   7   var FIT_TO_PAGE = 0;
   8   var FIT_TO_WIDTH = 1;
   9
  10   Polymer({
  11     is: 'viewer-zoom-toolbar',
  12
  13     properties: {
  14       visible_: {
  15         type: Boolean,
  16         value: true
  17       }
  18     },
  19
  20     hostAttributes: {
  21       hidden: true  // Toolbars are explicitly shown once the plugin is ready.
  22     },
  23
  24     fitToggle: function() {
  25       if (this.$['fit-button'].activeIndex == FIT_TO_WIDTH)
  26         this.fire('fit-to-width');
  27       else
  28         this.fire('fit-to-page');
  29     },
  30
  31     zoomIn: function() {
  32       this.fire('zoom-in');
  33     },
  34
  35     zoomOut: function() {
  36       this.fire('zoom-out');
  37     },
  38
  39     show: function() {
  40       if (!this.visible_) {
  41         this.visible_ = true;
  42         this.$['fit-button'].show();
  43         this.$['zoom-in-button'].show();
  44         this.$['zoom-out-button'].show();
  45       }
  46     },
  47
  48     hide: function() {
  49       if (this.visible_) {
  50         this.visible_ = false;
  51         this.$['fit-button'].hide();
  52         this.$['zoom-in-button'].hide();
  53         this.$['zoom-out-button'].hide();
  54       }
  55     },
  56   });
  57
  58 })();