910 lines
24 KiB
JavaScript
910 lines
24 KiB
JavaScript
webshims.register('track', function($, webshims, window, document, undefined){
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"use strict";
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var mediaelement = webshims.mediaelement;
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var id = new Date().getTime();
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//descriptions are not really shown, but they are inserted into the dom
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var showTracks = {subtitles: 1, captions: 1, descriptions: 1};
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var dummyTrack = $('<track />');
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var support = webshims.support;
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var supportTrackMod = support.ES5 && support.objectAccessor;
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var createEventTarget = function(obj){
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var eventList = {};
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obj.addEventListener = function(name, fn){
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if(eventList[name]){
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webshims.error('always use $.on to the shimed event: '+ name +' already bound fn was: '+ eventList[name] +' your fn was: '+ fn);
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}
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eventList[name] = fn;
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};
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obj.removeEventListener = function(name, fn){
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if(eventList[name] && eventList[name] != fn){
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webshims.error('always use $.on/$.off to the shimed event: '+ name +' already bound fn was: '+ eventList[name] +' your fn was: '+ fn);
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}
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if(eventList[name]){
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delete eventList[name];
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}
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};
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return obj;
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};
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var cueListProto = {
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getCueById: function(id){
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var cue = null;
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for(var i = 0, len = this.length; i < len; i++){
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if(this[i].id === id){
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cue = this[i];
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break;
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}
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}
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return cue;
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}
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};
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var numericModes = {
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0: 'disabled',
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1: 'hidden',
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2: 'showing'
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};
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var textTrackProto = {
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shimActiveCues: null,
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_shimActiveCues: null,
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activeCues: null,
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cues: null,
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kind: 'subtitles',
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label: '',
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language: '',
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id: '',
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mode: 'disabled',
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oncuechange: null,
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toString: function() {
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return "[object TextTrack]";
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},
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addCue: function(cue){
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if(!this.cues){
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this.cues = mediaelement.createCueList();
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} else {
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var lastCue = this.cues[this.cues.length-1];
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if(lastCue && lastCue.startTime > cue.startTime){
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webshims.error("cue startTime higher than previous cue's startTime");
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return;
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}
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}
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if(cue.startTime >= cue.endTime ){
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webshim.error('startTime >= endTime of cue: '+ cue.text);
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}
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if(cue.track && cue.track.removeCue){
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cue.track.removeCue(cue);
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}
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cue.track = this;
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this.cues.push(cue);
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},
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//ToDo: make it more dynamic
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removeCue: function(cue){
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var cues = this.cues || [];
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var i = 0;
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var len = cues.length;
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if(cue.track != this){
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webshims.error("cue not part of track");
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return;
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}
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for(; i < len; i++){
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if(cues[i] === cue){
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cues.splice(i, 1);
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cue.track = null;
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break;
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}
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}
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if(cue.track){
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webshims.error("cue not part of track");
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return;
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}
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}/*,
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DISABLED: 'disabled',
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OFF: 'disabled',
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HIDDEN: 'hidden',
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SHOWING: 'showing',
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ERROR: 3,
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LOADED: 2,
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LOADING: 1,
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NONE: 0*/
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};
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var copyProps = ['kind', 'label', 'srclang'];
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var copyName = {srclang: 'language'};
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var updateMediaTrackList = function(baseData, trackList){
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var i, len;
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var callChange = false;
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var removed = [];
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var added = [];
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var newTracks = [];
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if(!baseData){
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baseData = webshims.data(this, 'mediaelementBase') || webshims.data(this, 'mediaelementBase', {});
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}
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if(!trackList){
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baseData.blockTrackListUpdate = true;
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trackList = $.prop(this, 'textTracks');
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baseData.blockTrackListUpdate = false;
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}
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clearTimeout(baseData.updateTrackListTimer);
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$('track', this).each(function(){
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var track = $.prop(this, 'track');
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newTracks.push(track);
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if(trackList.indexOf(track) == -1){
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added.push(track);
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}
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});
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if(baseData.scriptedTextTracks){
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for(i = 0, len = baseData.scriptedTextTracks.length; i < len; i++){
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newTracks.push(baseData.scriptedTextTracks[i]);
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if(trackList.indexOf(baseData.scriptedTextTracks[i]) == -1){
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added.push(baseData.scriptedTextTracks[i]);
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}
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}
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}
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for(i = 0, len = trackList.length; i < len; i++){
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if(newTracks.indexOf(trackList[i]) == -1){
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removed.push(trackList[i]);
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}
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}
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if(removed.length || added.length){
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trackList.splice(0);
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for(i = 0, len = newTracks.length; i < len; i++){
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trackList.push(newTracks[i]);
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}
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for(i = 0, len = removed.length; i < len; i++){
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$([trackList]).triggerHandler($.Event({type: 'removetrack', track: removed[i]}));
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}
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for(i = 0, len = added.length; i < len; i++){
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$([trackList]).triggerHandler($.Event({type: 'addtrack', track: added[i]}));
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}
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//todo: remove
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if(baseData.scriptedTextTracks || removed.length){
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$(this).triggerHandler('updatetrackdisplay');
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}
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}
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for(i = 0, len = trackList.length; i < len; i++){
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if(trackList[i].__wsmode != trackList[i].mode){
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trackList[i].__wsmode = trackList[i].mode;
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callChange = true;
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}
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}
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if(callChange){
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$([trackList]).triggerHandler('change');
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}
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};
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var refreshTrack = function(track, trackData){
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if(!trackData){
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trackData = webshims.data(track, 'trackData');
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}
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if(trackData && !trackData.isTriggering){
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trackData.isTriggering = true;
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setTimeout(function(){
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$(track).closest('audio, video').triggerHandler('updatetrackdisplay');
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trackData.isTriggering = false;
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}, 9);
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}
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};
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var isDefaultTrack = (function(){
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var defaultKinds = {
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subtitles: {
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subtitles: 1,
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captions: 1
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},
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descriptions: {descriptions: 1},
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chapters: {chapters: 1}
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};
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defaultKinds.captions = defaultKinds.subtitles;
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return function(track){
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var kind, firstDefaultTrack;
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var isDefault = $.prop(track, 'default');
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if(isDefault && (kind = $.prop(track, 'kind')) != 'metadata'){
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firstDefaultTrack = $(track)
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.parent()
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.find('track[default]')
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.filter(function(){
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return !!(defaultKinds[kind][$.prop(this, 'kind')]);
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})[0]
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;
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if(firstDefaultTrack != track){
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isDefault = false;
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webshims.error('more than one default track of a specific kind detected. Fall back to default = false');
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}
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}
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return isDefault;
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};
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})();
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var emptyDiv = $('<div />')[0];
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function VTTCue(startTime, endTime, text){
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if(arguments.length != 3){
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webshims.error("wrong arguments.length for VTTCue.constructor");
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}
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this.startTime = startTime;
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this.endTime = endTime;
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this.text = text;
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this.onenter = null;
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this.onexit = null;
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this.pauseOnExit = false;
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this.track = null;
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this.id = null;
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this.getCueAsHTML = (function(){
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var lastText = "";
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var parsedText = "";
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var fragment;
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return function(){
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var i, len;
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if(!fragment){
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fragment = document.createDocumentFragment();
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}
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if(lastText != this.text){
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lastText = this.text;
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parsedText = mediaelement.parseCueTextToHTML(lastText);
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emptyDiv.innerHTML = parsedText;
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for(i = 0, len = emptyDiv.childNodes.length; i < len; i++){
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fragment.appendChild(emptyDiv.childNodes[i].cloneNode(true));
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}
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}
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return fragment.cloneNode(true);
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};
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})();
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}
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window.VTTCue = VTTCue;
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window.TextTrackCue = function(){
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webshims.error("Use VTTCue constructor instead of abstract TextTrackCue constructor.");
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VTTCue.apply(this, arguments);
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};
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window.TextTrackCue.prototype = VTTCue.prototype;
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mediaelement.createCueList = function(){
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return $.extend([], cueListProto);
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};
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mediaelement.parseCueTextToHTML = (function(){
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var tagSplits = /(<\/?[^>]+>)/ig;
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var allowedTags = /^(?:c|v|ruby|rt|b|i|u)/;
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var regEnd = /\<\s*\//;
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var addToTemplate = function(localName, attribute, tag, html){
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var ret;
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if(regEnd.test(html)){
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ret = '</'+ localName +'>';
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} else {
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tag.splice(0, 1);
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ret = '<'+ localName +' '+ attribute +'="'+ (tag.join(' ').replace(/\"/g, '"')) +'">';
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}
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return ret;
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};
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var replacer = function(html){
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var tag = html.replace(/[<\/>]+/ig,"").split(/[\s\.]+/);
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if(tag[0]){
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tag[0] = tag[0].toLowerCase();
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if(allowedTags.test(tag[0])){
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if(tag[0] == 'c'){
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html = addToTemplate('span', 'class', tag, html);
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} else if(tag[0] == 'v'){
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html = addToTemplate('q', 'title', tag, html);
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}
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} else {
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html = "";
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}
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}
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return html;
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};
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return function(cueText){
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return cueText.replace(tagSplits, replacer);
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};
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})();
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var mapTtmlToVtt = function(i){
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var content = i+'';
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var begin = this.getAttribute('begin') || '';
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var end = this.getAttribute('end') || '';
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var text = $.trim($.text(this));
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if(!/\./.test(begin)){
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begin += '.000';
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}
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if(!/\./.test(end)){
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end += '.000';
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}
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content += '\n';
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content += begin +' --> '+end+'\n';
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content += text;
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return content;
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};
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var ttmlTextToVTT = function(ttml){
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ttml = $.parseXML(ttml) || [];
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return $(ttml).find('[begin][end]').map(mapTtmlToVtt).get().join('\n\n') || '';
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};
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var loadingTracks = 0;
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mediaelement.loadTextTrack = function(mediaelem, track, trackData, _default){
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var loadEvents = 'play playing loadedmetadata loadstart';
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var obj = trackData.track;
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var load = function(){
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var error, ajax, createAjax;
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var isDisabled = obj.mode == 'disabled';
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var videoState = !!($.prop(mediaelem, 'readyState') > 0 || $.prop(mediaelem, 'networkState') == 2 || !$.prop(mediaelem, 'paused'));
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var src = (!isDisabled || videoState) && ($.attr(track, 'src') && $.prop(track, 'src'));
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if(src){
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$(mediaelem).off(loadEvents, load).off('updatetrackdisplay', load);
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if(!trackData.readyState){
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error = function(){
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loadingTracks--;
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trackData.readyState = 3;
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obj.cues = null;
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obj.activeCues = obj.shimActiveCues = obj._shimActiveCues = null;
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$(track).triggerHandler('error');
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};
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trackData.readyState = 1;
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try {
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obj.cues = mediaelement.createCueList();
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obj.activeCues = obj.shimActiveCues = obj._shimActiveCues = mediaelement.createCueList();
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loadingTracks++;
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createAjax = function(){
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ajax = $.ajax({
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dataType: 'text',
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url: src,
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success: function(text){
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loadingTracks--;
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var contentType = ajax.getResponseHeader('content-type') || '';
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if(!contentType.indexOf('application/xml')){
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text = ttmlTextToVTT(text);
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} else if(contentType.indexOf('text/vtt')){
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webshims.error('set the mime-type of your WebVTT files to text/vtt. see: http://dev.w3.org/html5/webvtt/#text/vtt');
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}
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mediaelement.parseCaptions(text, obj, function(cues){
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if(cues && 'length' in cues){
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trackData.readyState = 2;
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$(track).triggerHandler('load');
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$(mediaelem).triggerHandler('updatetrackdisplay');
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} else {
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error();
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}
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});
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},
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error: error
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});
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};
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if(isDisabled){
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setTimeout(createAjax, loadingTracks * 2);
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} else {
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createAjax();
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}
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} catch(er){
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error();
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webshims.error(er);
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}
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}
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}
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};
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trackData.readyState = 0;
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obj.shimActiveCues = null;
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obj._shimActiveCues = null;
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obj.activeCues = null;
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obj.cues = null;
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$(mediaelem).on(loadEvents, load);
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if(_default){
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obj.mode = showTracks[obj.kind] ? 'showing' : 'hidden';
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load();
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} else {
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$(mediaelem).on('updatetrackdisplay', load);
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}
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};
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mediaelement.createTextTrack = function(mediaelem, track){
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var obj, trackData;
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if(track.nodeName){
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trackData = webshims.data(track, 'trackData');
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if(trackData){
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refreshTrack(track, trackData);
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obj = trackData.track;
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}
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}
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if(!obj){
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obj = createEventTarget(webshims.objectCreate(textTrackProto));
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if(!supportTrackMod){
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copyProps.forEach(function(copyProp){
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var prop = $.prop(track, copyProp);
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if(prop){
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obj[copyName[copyProp] || copyProp] = prop;
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}
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});
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}
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if(track.nodeName){
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if(supportTrackMod){
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copyProps.forEach(function(copyProp){
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webshims.defineProperty(obj, copyName[copyProp] || copyProp, {
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get: function(){
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return $.prop(track, copyProp);
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}
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});
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});
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}
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obj.id = $(track).prop('id');
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trackData = webshims.data(track, 'trackData', {track: obj});
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mediaelement.loadTextTrack(mediaelem, track, trackData, isDefaultTrack(track));
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} else {
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if(supportTrackMod){
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copyProps.forEach(function(copyProp){
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webshims.defineProperty(obj, copyName[copyProp] || copyProp, {
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value: track[copyProp],
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writeable: false
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});
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});
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}
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obj.cues = mediaelement.createCueList();
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obj.activeCues = obj._shimActiveCues = obj.shimActiveCues = mediaelement.createCueList();
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obj.mode = 'hidden';
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obj.readyState = 2;
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}
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if(obj.kind == 'subtitles' && !obj.language){
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webshims.error('you must provide a language for track in subtitles state');
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}
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obj.__wsmode = obj.mode;
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webshims.defineProperty(obj, '_wsUpdateMode', {
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value: function(){
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$(mediaelem).triggerHandler('updatetrackdisplay');
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},
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enumerable: false
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});
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}
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return obj;
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};
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if(!$.propHooks.mode){
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$.propHooks.mode = {
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set: function(obj, value){
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obj.mode = value;
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if(obj._wsUpdateMode && obj._wsUpdateMode.call){
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obj._wsUpdateMode();
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}
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return obj.mode;
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}
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};
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}
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/*
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taken from:
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Captionator 0.5.1 [CaptionCrunch]
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Christopher Giffard, 2011
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Share and enjoy
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https://github.com/cgiffard/Captionator
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modified for webshims
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*/
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mediaelement.parseCaptionChunk = (function(){
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// Set up timestamp parsers
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var WebVTTTimestampParser = /^(\d{2})?:?(\d{2}):(\d{2})\.(\d+)\s+\-\-\>\s+(\d{2})?:?(\d{2}):(\d{2})\.(\d+)\s*(.*)/;
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var WebVTTDEFAULTSCueParser = /^(DEFAULTS|DEFAULT)\s+\-\-\>\s+(.*)/g;
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var WebVTTSTYLECueParser = /^(STYLE|STYLES)\s+\-\-\>\s*\n([\s\S]*)/g;
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var WebVTTCOMMENTCueParser = /^(COMMENT|COMMENTS)\s+\-\-\>\s+(.*)/g;
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var SRTTimestampParser = /^(\d{2})?:?(\d{2}):(\d{2})[\.\,](\d+)\s+\-\-\>\s+(\d{2})?:?(\d{2}):(\d{2})[\.\,](\d+)\s*(.*)/;
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return function(subtitleElement,objectCount){
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var subtitleParts, timeIn, timeOut, html, timeData, subtitlePartIndex, id;
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var timestampMatch, tmpCue;
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// WebVTT Special Cue Logic
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if (WebVTTDEFAULTSCueParser.exec(subtitleElement) || WebVTTCOMMENTCueParser.exec(subtitleElement) || WebVTTSTYLECueParser.exec(subtitleElement)) {
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return null;
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}
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subtitleParts = subtitleElement.split(/\n/g);
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// Trim off any blank lines (logically, should only be max. one, but loop to be sure)
|
|
while (!subtitleParts[0].replace(/\s+/ig,"").length && subtitleParts.length > 0) {
|
|
subtitleParts.shift();
|
|
}
|
|
|
|
if (subtitleParts[0].match(/^\s*[a-z0-9-\_]+\s*$/ig)) {
|
|
// The identifier becomes the cue ID (when *we* load the cues from file. Programatically created cues can have an ID of whatever.)
|
|
id = String(subtitleParts.shift().replace(/\s*/ig,""));
|
|
}
|
|
|
|
for (subtitlePartIndex = 0; subtitlePartIndex < subtitleParts.length; subtitlePartIndex ++) {
|
|
var timestamp = subtitleParts[subtitlePartIndex];
|
|
|
|
if ((timestampMatch = WebVTTTimestampParser.exec(timestamp)) || (timestampMatch = SRTTimestampParser.exec(timestamp))) {
|
|
|
|
// WebVTT
|
|
|
|
timeData = timestampMatch.slice(1);
|
|
|
|
timeIn = parseInt((timeData[0]||0) * 60 * 60,10) + // Hours
|
|
parseInt((timeData[1]||0) * 60,10) + // Minutes
|
|
parseInt((timeData[2]||0),10) + // Seconds
|
|
parseFloat("0." + (timeData[3]||0)); // MS
|
|
|
|
timeOut = parseInt((timeData[4]||0) * 60 * 60,10) + // Hours
|
|
parseInt((timeData[5]||0) * 60,10) + // Minutes
|
|
parseInt((timeData[6]||0),10) + // Seconds
|
|
parseFloat("0." + (timeData[7]||0)); // MS
|
|
/*
|
|
if (timeData[8]) {
|
|
cueSettings = timeData[8];
|
|
}
|
|
*/
|
|
}
|
|
|
|
// We've got the timestamp - return all the other unmatched lines as the raw subtitle data
|
|
subtitleParts = subtitleParts.slice(0,subtitlePartIndex).concat(subtitleParts.slice(subtitlePartIndex+1));
|
|
break;
|
|
}
|
|
|
|
if (!timeIn && !timeOut) {
|
|
// We didn't extract any time information. Assume the cue is invalid!
|
|
webshims.warn("couldn't extract time information: "+[timeIn, timeOut, subtitleParts.join("\n"), id].join(' ; '));
|
|
return null;
|
|
}
|
|
/*
|
|
// Consolidate cue settings, convert defaults to object
|
|
var compositeCueSettings =
|
|
cueDefaults
|
|
.reduce(function(previous,current,index,array){
|
|
previous[current.split(":")[0]] = current.split(":")[1];
|
|
return previous;
|
|
},{});
|
|
|
|
// Loop through cue settings, replace defaults with cue specific settings if they exist
|
|
compositeCueSettings =
|
|
cueSettings
|
|
.split(/\s+/g)
|
|
.filter(function(set) { return set && !!set.length; })
|
|
// Convert array to a key/val object
|
|
.reduce(function(previous,current,index,array){
|
|
previous[current.split(":")[0]] = current.split(":")[1];
|
|
return previous;
|
|
},compositeCueSettings);
|
|
|
|
// Turn back into string like the VTTCue constructor expects
|
|
cueSettings = "";
|
|
for (var key in compositeCueSettings) {
|
|
if (compositeCueSettings.hasOwnProperty(key)) {
|
|
cueSettings += !!cueSettings.length ? " " : "";
|
|
cueSettings += key + ":" + compositeCueSettings[key];
|
|
}
|
|
}
|
|
*/
|
|
// The remaining lines are the subtitle payload itself (after removing an ID if present, and the time);
|
|
html = subtitleParts.join("\n");
|
|
tmpCue = new VTTCue(timeIn, timeOut, html);
|
|
if(id){
|
|
tmpCue.id = id;
|
|
}
|
|
return tmpCue;
|
|
};
|
|
})();
|
|
|
|
mediaelement.parseCaptions = function(captionData, track, complete) {
|
|
|
|
var cue, lazyProcess, regWevVTT, startDate, isWEBVTT;
|
|
|
|
mediaelement.createCueList();
|
|
if (captionData) {
|
|
|
|
regWevVTT = /^WEBVTT(\s*FILE)?/ig;
|
|
|
|
lazyProcess = function(i, len){
|
|
|
|
for(; i < len; i++){
|
|
cue = captionData[i];
|
|
if(regWevVTT.test(cue)){
|
|
isWEBVTT = true;
|
|
} else if(cue.replace(/\s*/ig,"").length){
|
|
cue = mediaelement.parseCaptionChunk(cue, i);
|
|
if(cue){
|
|
track.addCue(cue);
|
|
}
|
|
}
|
|
if(startDate < (new Date().getTime()) - 30){
|
|
i++;
|
|
setTimeout(function(){
|
|
startDate = new Date().getTime();
|
|
lazyProcess(i, len);
|
|
}, 90);
|
|
|
|
break;
|
|
}
|
|
}
|
|
if(i >= len){
|
|
if(!isWEBVTT){
|
|
webshims.error('please use WebVTT format. This is the standard');
|
|
}
|
|
complete(track.cues);
|
|
}
|
|
};
|
|
|
|
captionData = captionData.replace(/\r\n/g,"\n");
|
|
|
|
setTimeout(function(){
|
|
captionData = captionData.replace(/\r/g,"\n");
|
|
setTimeout(function(){
|
|
startDate = new Date().getTime();
|
|
captionData = captionData.split(/\n\n+/g);
|
|
lazyProcess(0, captionData.length);
|
|
}, 9);
|
|
}, 9);
|
|
|
|
} else {
|
|
webshims.error("Required parameter captionData not supplied.");
|
|
}
|
|
};
|
|
|
|
|
|
mediaelement.createTrackList = function(mediaelem, baseData){
|
|
baseData = baseData || webshims.data(mediaelem, 'mediaelementBase') || webshims.data(mediaelem, 'mediaelementBase', {});
|
|
if(!baseData.textTracks){
|
|
baseData.textTracks = [];
|
|
webshims.defineProperties(baseData.textTracks, {
|
|
onaddtrack: {value: null},
|
|
onremovetrack: {value: null},
|
|
onchange: {value: null},
|
|
getTrackById: {
|
|
value: function(id){
|
|
var track = null;
|
|
for(var i = 0; i < baseData.textTracks.length; i++){
|
|
if(id == baseData.textTracks[i].id){
|
|
track = baseData.textTracks[i];
|
|
break;
|
|
}
|
|
}
|
|
return track;
|
|
}
|
|
}
|
|
});
|
|
createEventTarget(baseData.textTracks);
|
|
$(mediaelem).on('updatetrackdisplay', function(){
|
|
var track;
|
|
for(var i = 0; i < baseData.textTracks.length; i++){
|
|
track = baseData.textTracks[i];
|
|
if(track.__wsmode != track.mode){
|
|
track.__wsmode = track.mode;
|
|
$([ baseData.textTracks ]).triggerHandler('change');
|
|
}
|
|
}
|
|
});
|
|
|
|
}
|
|
return baseData.textTracks;
|
|
};
|
|
|
|
if(!support.track){
|
|
webshims.defineNodeNamesBooleanProperty(['track'], 'default');
|
|
webshims.reflectProperties(['track'], ['srclang', 'label']);
|
|
|
|
webshims.defineNodeNameProperties('track', {
|
|
src: {
|
|
//attr: {},
|
|
reflect: true,
|
|
propType: 'src'
|
|
}
|
|
});
|
|
}
|
|
|
|
webshims.defineNodeNameProperties('track', {
|
|
kind: {
|
|
attr: support.track ? {
|
|
set: function(value){
|
|
var trackData = webshims.data(this, 'trackData');
|
|
this.setAttribute('data-kind', value);
|
|
if(trackData){
|
|
trackData.attrKind = value;
|
|
}
|
|
},
|
|
get: function(){
|
|
var trackData = webshims.data(this, 'trackData');
|
|
if(trackData && ('attrKind' in trackData)){
|
|
return trackData.attrKind;
|
|
}
|
|
return this.getAttribute('kind');
|
|
}
|
|
} : {},
|
|
reflect: true,
|
|
propType: 'enumarated',
|
|
defaultValue: 'subtitles',
|
|
limitedTo: ['subtitles', 'captions', 'descriptions', 'chapters', 'metadata']
|
|
}
|
|
});
|
|
|
|
$.each(copyProps, function(i, copyProp){
|
|
var name = copyName[copyProp] || copyProp;
|
|
webshims.onNodeNamesPropertyModify('track', copyProp, function(){
|
|
var trackData = webshims.data(this, 'trackData');
|
|
|
|
if(trackData){
|
|
if(copyProp == 'kind'){
|
|
refreshTrack(this, trackData);
|
|
}
|
|
if(!supportTrackMod){
|
|
trackData.track[name] = $.prop(this, copyProp);
|
|
}
|
|
}
|
|
});
|
|
});
|
|
|
|
|
|
webshims.onNodeNamesPropertyModify('track', 'src', function(val){
|
|
if(val){
|
|
var data = webshims.data(this, 'trackData');
|
|
var media;
|
|
if(data){
|
|
media = $(this).closest('video, audio');
|
|
if(media[0]){
|
|
mediaelement.loadTextTrack(media, this, data);
|
|
}
|
|
}
|
|
}
|
|
|
|
});
|
|
|
|
//
|
|
webshims.defineNodeNamesProperties(['track'], {
|
|
ERROR: {
|
|
value: 3
|
|
},
|
|
LOADED: {
|
|
value: 2
|
|
},
|
|
LOADING: {
|
|
value: 1
|
|
},
|
|
NONE: {
|
|
value: 0
|
|
},
|
|
readyState: {
|
|
get: function(){
|
|
return (webshims.data(this, 'trackData') || {readyState: 0}).readyState;
|
|
},
|
|
writeable: false
|
|
},
|
|
track: {
|
|
get: function(){
|
|
return mediaelement.createTextTrack($(this).closest('audio, video')[0], this);
|
|
},
|
|
writeable: false
|
|
}
|
|
}, 'prop');
|
|
|
|
webshims.defineNodeNamesProperties(['audio', 'video'], {
|
|
textTracks: {
|
|
get: function(){
|
|
var media = this;
|
|
var baseData = webshims.data(media, 'mediaelementBase') || webshims.data(media, 'mediaelementBase', {});
|
|
var tracks = mediaelement.createTrackList(media, baseData);
|
|
if(!baseData.blockTrackListUpdate){
|
|
updateMediaTrackList.call(media, baseData, tracks);
|
|
}
|
|
return tracks;
|
|
},
|
|
writeable: false
|
|
},
|
|
addTextTrack: {
|
|
value: function(kind, label, lang){
|
|
var textTrack = mediaelement.createTextTrack(this, {
|
|
kind: dummyTrack.prop('kind', kind || '').prop('kind'),
|
|
label: label || '',
|
|
srclang: lang || ''
|
|
});
|
|
var baseData = webshims.data(this, 'mediaelementBase') || webshims.data(this, 'mediaelementBase', {});
|
|
if (!baseData.scriptedTextTracks) {
|
|
baseData.scriptedTextTracks = [];
|
|
}
|
|
baseData.scriptedTextTracks.push(textTrack);
|
|
updateMediaTrackList.call(this);
|
|
return textTrack;
|
|
}
|
|
}
|
|
}, 'prop');
|
|
|
|
//wsmediareload
|
|
var thUpdateList = function(e){
|
|
if($(e.target).is('audio, video')){
|
|
var baseData = webshims.data(e.target, 'mediaelementBase');
|
|
if(baseData){
|
|
clearTimeout(baseData.updateTrackListTimer);
|
|
baseData.updateTrackListTimer = setTimeout(function(){
|
|
updateMediaTrackList.call(e.target, baseData);
|
|
}, 0);
|
|
}
|
|
}
|
|
};
|
|
|
|
var getNativeReadyState = function(trackElem, textTrack){
|
|
return textTrack.readyState || trackElem.readyState;
|
|
};
|
|
var stopOriginalEvent = function(e){
|
|
if(e.originalEvent){
|
|
e.stopImmediatePropagation();
|
|
}
|
|
};
|
|
var hideNativeTracks = function(){
|
|
if(webshims.implement(this, 'track')){
|
|
var kind;
|
|
var origTrack = this.track;
|
|
if(origTrack){
|
|
|
|
if (!webshims.bugs.track && (origTrack.mode || getNativeReadyState(this, origTrack))) {
|
|
$.prop(this, 'track').mode = numericModes[origTrack.mode] || origTrack.mode;
|
|
}
|
|
//disable track from showing + remove UI
|
|
kind = $.prop(this, 'kind');
|
|
origTrack.mode = (typeof origTrack.mode == 'string') ? 'disabled' : 0;
|
|
this.kind = 'metadata';
|
|
|
|
$(this).attr({kind: kind});
|
|
|
|
}
|
|
$(this).on('load error', stopOriginalEvent);
|
|
}
|
|
};
|
|
|
|
webshims.addReady(function(context, insertedElement){
|
|
var insertedMedia = insertedElement.filter('video, audio, track').closest('audio, video');
|
|
$('video, audio', context)
|
|
.add(insertedMedia)
|
|
.each(function(){
|
|
updateMediaTrackList.call(this);
|
|
})
|
|
.on('emptied updatetracklist wsmediareload', thUpdateList)
|
|
.each(function(){
|
|
if(support.track){
|
|
var shimedTextTracks = $.prop(this, 'textTracks');
|
|
var origTextTracks = this.textTracks;
|
|
|
|
if(shimedTextTracks.length != origTextTracks.length){
|
|
webshims.warn("textTracks couldn't be copied");
|
|
}
|
|
|
|
$('track', this).each(hideNativeTracks);
|
|
}
|
|
})
|
|
;
|
|
|
|
insertedMedia.each(function(){
|
|
var media = this;
|
|
var baseData = webshims.data(media, 'mediaelementBase');
|
|
if(baseData){
|
|
clearTimeout(baseData.updateTrackListTimer);
|
|
baseData.updateTrackListTimer = setTimeout(function(){
|
|
updateMediaTrackList.call(media, baseData);
|
|
}, 9);
|
|
}
|
|
});
|
|
});
|
|
|
|
if(support.texttrackapi){
|
|
$('video, audio').trigger('trackapichange');
|
|
}
|
|
});
|