www.aleph1.co.uk Git - yaffs-website/blob - node_modules/video.js/es5/control-bar/text-track-controls/descriptions-button.js

   1 'use strict';
   2
   3 exports.__esModule = true;
   4
   5 var _textTrackButton = require('./text-track-button.js');
   6
   7 var _textTrackButton2 = _interopRequireDefault(_textTrackButton);
   8
   9 var _component = require('../../component.js');
  10
  11 var _component2 = _interopRequireDefault(_component);
  12
  13 var _fn = require('../../utils/fn.js');
  14
  15 var Fn = _interopRequireWildcard(_fn);
  16
  17 function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj['default'] = obj; return newObj; } }
  18
  19 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
  20
  21 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  22
  23 function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
  24
  25 function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /**
  26                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 * @file descriptions-button.js
  27                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 */
  28
  29
  30 /**
  31  * The button component for toggling and selecting descriptions
  32  *
  33  * @extends TextTrackButton
  34  */
  35 var DescriptionsButton = function (_TextTrackButton) {
  36   _inherits(DescriptionsButton, _TextTrackButton);
  37
  38   /**
  39    * Creates an instance of this class.
  40    *
  41    * @param {Player} player
  42    *        The `Player` that this class should be attached to.
  43    *
  44    * @param {Object} [options]
  45    *        The key/value store of player options.
  46    *
  47    * @param {Component~ReadyCallback} [ready]
  48    *        The function to call when this component is ready.
  49    */
  50   function DescriptionsButton(player, options, ready) {
  51     _classCallCheck(this, DescriptionsButton);
  52
  53     var _this = _possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));
  54
  55     _this.el_.setAttribute('aria-label', 'Descriptions Menu');
  56
  57     var tracks = player.textTracks();
  58
  59     if (tracks) {
  60       var changeHandler = Fn.bind(_this, _this.handleTracksChange);
  61
  62       tracks.addEventListener('change', changeHandler);
  63       _this.on('dispose', function () {
  64         tracks.removeEventListener('change', changeHandler);
  65       });
  66     }
  67     return _this;
  68   }
  69
  70   /**
  71    * Handle text track change
  72    *
  73    * @param {EventTarget~Event} event
  74    *        The event that caused this function to run
  75    *
  76    * @listens TextTrackList#change
  77    */
  78
  79
  80   DescriptionsButton.prototype.handleTracksChange = function handleTracksChange(event) {
  81     var tracks = this.player().textTracks();
  82     var disabled = false;
  83
  84     // Check whether a track of a different kind is showing
  85     for (var i = 0, l = tracks.length; i < l; i++) {
  86       var track = tracks[i];
  87
  88       if (track.kind !== this.kind_ && track.mode === 'showing') {
  89         disabled = true;
  90         break;
  91       }
  92     }
  93
  94     // If another track is showing, disable this menu button
  95     if (disabled) {
  96       this.disable();
  97     } else {
  98       this.enable();
  99     }
 100   };
 101
 102   /**
 103    * Builds the default DOM `className`.
 104    *
 105    * @return {string}
 106    *         The DOM `className` for this object.
 107    */
 108
 109
 110   DescriptionsButton.prototype.buildCSSClass = function buildCSSClass() {
 111     return 'vjs-descriptions-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);
 112   };
 113
 114   return DescriptionsButton;
 115 }(_textTrackButton2['default']);
 116
 117 /**
 118  * `kind` of TextTrack to look for to associate it with this menu.
 119  *
 120  * @type {string}
 121  * @private
 122  */
 123
 124
 125 DescriptionsButton.prototype.kind_ = 'descriptions';
 126
 127 /**
 128  * The text that should display over the `DescriptionsButton`s controls. Added for localization.
 129  *
 130  * @type {string}
 131  * @private
 132  */
 133 DescriptionsButton.prototype.controlText_ = 'Descriptions';
 134
 135 _component2['default'].registerComponent('DescriptionsButton', DescriptionsButton);
 136 exports['default'] = DescriptionsButton;