yaffs.net Git - yaffs-website/blob - node_modules/video.js/es5/tracks/video-track-list.js

   1 'use strict';
   2
   3 exports.__esModule = true;
   4
   5 var _trackList = require('./track-list');
   6
   7 var _trackList2 = _interopRequireDefault(_trackList);
   8
   9 var _browser = require('../utils/browser.js');
  10
  11 var browser = _interopRequireWildcard(_browser);
  12
  13 var _document = require('global/document');
  14
  15 var _document2 = _interopRequireDefault(_document);
  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 video-track-list.js
  27                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 */
  28
  29
  30 /**
  31  * Un-select all other {@link VideoTrack}s that are selected.
  32  *
  33  * @param {VideoTrackList} list
  34  *        list to work on
  35  *
  36  * @param {VideoTrack} track
  37  *        The track to skip
  38  *
  39  * @private
  40  */
  41 var disableOthers = function disableOthers(list, track) {
  42   for (var i = 0; i < list.length; i++) {
  43     if (track.id === list[i].id) {
  44       continue;
  45     }
  46     // another video track is enabled, disable it
  47     list[i].selected = false;
  48   }
  49 };
  50
  51 /**
  52  * The current list of {@link VideoTrack} for a video.
  53  *
  54  * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}
  55  * @extends TrackList
  56  */
  57
  58 var VideoTrackList = function (_TrackList) {
  59   _inherits(VideoTrackList, _TrackList);
  60
  61   /**
  62    * Create an instance of this class.
  63    *
  64    * @param {VideoTrack[]} [tracks=[]]
  65    *        A list of `VideoTrack` to instantiate the list with.
  66    */
  67   function VideoTrackList() {
  68     var _this, _ret;
  69
  70     var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
  71
  72     _classCallCheck(this, VideoTrackList);
  73
  74     var list = void 0;
  75
  76     // make sure only 1 track is enabled
  77     // sorted from last index to first index
  78     for (var i = tracks.length - 1; i >= 0; i--) {
  79       if (tracks[i].selected) {
  80         disableOthers(tracks, tracks[i]);
  81         break;
  82       }
  83     }
  84
  85     // IE8 forces us to implement inheritance ourselves
  86     // as it does not support Object.defineProperty properly
  87     if (browser.IS_IE8) {
  88       list = _document2['default'].createElement('custom');
  89       for (var prop in _trackList2['default'].prototype) {
  90         if (prop !== 'constructor') {
  91           list[prop] = _trackList2['default'].prototype[prop];
  92         }
  93       }
  94       for (var _prop in VideoTrackList.prototype) {
  95         if (_prop !== 'constructor') {
  96           list[_prop] = VideoTrackList.prototype[_prop];
  97         }
  98       }
  99     }
 100
 101     list = (_this = _possibleConstructorReturn(this, _TrackList.call(this, tracks, list)), _this);
 102     list.changing_ = false;
 103
 104     /**
 105      * @member {number} VideoTrackList#selectedIndex
 106      *         The current index of the selected {@link VideoTrack`}.
 107      */
 108     Object.defineProperty(list, 'selectedIndex', {
 109       get: function get() {
 110         for (var _i = 0; _i < this.length; _i++) {
 111           if (this[_i].selected) {
 112             return _i;
 113           }
 114         }
 115         return -1;
 116       },
 117       set: function set() {}
 118     });
 119
 120     return _ret = list, _possibleConstructorReturn(_this, _ret);
 121   }
 122
 123   /**
 124    * Add a {@link VideoTrack} to the `VideoTrackList`.
 125    *
 126    * @param {VideoTrack} track
 127    *        The VideoTrack to add to the list
 128    *
 129    * @fires TrackList#addtrack
 130    * @private
 131    */
 132
 133
 134   VideoTrackList.prototype.addTrack_ = function addTrack_(track) {
 135     var _this2 = this;
 136
 137     if (track.selected) {
 138       disableOthers(this, track);
 139     }
 140
 141     _TrackList.prototype.addTrack_.call(this, track);
 142     // native tracks don't have this
 143     if (!track.addEventListener) {
 144       return;
 145     }
 146
 147     /**
 148      * @listens VideoTrack#selectedchange
 149      * @fires TrackList#change
 150      */
 151     track.addEventListener('selectedchange', function () {
 152       if (_this2.changing_) {
 153         return;
 154       }
 155       _this2.changing_ = true;
 156       disableOthers(_this2, track);
 157       _this2.changing_ = false;
 158       _this2.trigger('change');
 159     });
 160   };
 161
 162   /**
 163    * Add a {@link VideoTrack} to the `VideoTrackList`.
 164    *
 165    * @param {VideoTrack} track
 166    *        The VideoTrack to add to the list
 167    *
 168    * @fires TrackList#addtrack
 169    */
 170
 171
 172   VideoTrackList.prototype.addTrack = function addTrack(track) {
 173     this.addTrack_(track);
 174   };
 175
 176   /**
 177    * Remove a {@link VideoTrack} to the `VideoTrackList`.
 178    *
 179    * @param {VideoTrack} track
 180    *        The VideoTrack to remove from the list.
 181    *
 182    * @fires TrackList#removetrack
 183    */
 184
 185
 186   VideoTrackList.prototype.removeTrack = function removeTrack(track) {
 187     _TrackList.prototype.removeTrack_.call(this, track);
 188   };
 189
 190   return VideoTrackList;
 191 }(_trackList2['default']);
 192
 193 exports['default'] = VideoTrackList;