agenda-libre-ruby/public/webshims/shims/mediaelement-native-fix.js

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webshims.register('mediaelement-native-fix', function($, webshims, window, document, undefined){
var support = webshims.support;
var fixBuffered = (function(){
if(support.videoBuffered){return $.noop;}
var getBufferedData = function(elem){
var data = webshims.data(elem, 'mediaelementBuffered');
if(!data){
data = {
buffered: {
start: function(index){
if(index >= data.buffered.length){
webshims.error('buffered index size error');
return;
}
return 0;
},
end: function(index){
if(index >= data.buffered.length){
webshims.error('buffered index size error');
return;
}
return data.loaded;
},
length: 0
},
loaded: 0
};
webshims.data(elem, 'mediaelementBuffered', data);
}
return data;
};
var loadProgessListener = function(e){
e = e.originalEvent;
if(!e || !('lengthComputable' in e)){return;}
var data = webshims.data(e.target, 'mediaelement');
if(data && data.isActive != 'html5'){return;}
if(e.lengthComputable && 'loaded' in e){
var duration = e.target.duration;
var bufferedData = getBufferedData(e.target);
bufferedData.loaded = (duration) ? e.loaded / e.total * duration : 0;
if(bufferedData.loaded){
bufferedData.buffered.length = 1;
}
if(e.type == 'load'){
$(e.target).triggerHandler('progress');
}
}
};
var removeProgress = function(e){
var data = getBufferedData(e.target);
data.buffered.length = 0;
data.loaded = 0;
};
['audio', 'video'].forEach(function(nodeName){
var sup = webshims.defineNodeNameProperty(nodeName, 'buffered', {
prop: {
get: function(){
var data = webshims.data(this, 'mediaelement');
if(data && data.isActive == 'flash' && sup.prop._supget){
sup.prop._supget.apply(this);
} else {
return getBufferedData(this).buffered;
}
}
}
});
});
return function(){
$(this)
.off('load progress', loadProgessListener)
.off('emptied', removeProgress)
.on('load progress', loadProgessListener)
.on('emptied', removeProgress)
;
};
})();
(function(){
var videoElem = document.createElement('video');
if( !('preload' in videoElem) && ('autobuffer' in videoElem)){
var noBufferProps = {
metadata: 1,
none: 1
};
webshims.onNodeNamesPropertyModify(['audio', 'video'], ['preload'], {
set: function(value, boolValue, curType){
if(noBufferProps[value] || curType == 'removeAttr'){
this.autobuffer = false;
} else if( !(webshims.data(this, 'mediaelement') || {}).isActive == 'html5') {
this.autobuffer = true;
}
},
initAttr: true
});
}
})();
var fixProgressEvent = (function(){
if(support.mediaDefaultMuted){return $.noop;}
return function(){
if($.data(this, 'fixedMediaProgress')){return;}
var bufferTimer;
var lastBuffered;
var elem = this;
var getBufferedString = function(){
var buffered = $.prop(elem, 'buffered');
if(!buffered){return;}
var bufferString = "";
for(var i = 0, len = buffered.length; i < len;i++){
bufferString += buffered.end(i);
}
return bufferString;
};
var testBuffer = function(){
var buffered = getBufferedString();
if(buffered != lastBuffered){
lastBuffered = buffered;
webshims.error('needed to trigger progress manually');
$(elem).triggerHandler('progress');
}
};
$(this)
.data('fixedMediaProgress', true)
.on({
'play loadstart progress': function(e){
if(e.type == 'progress'){
lastBuffered = getBufferedString(this);
}
clearTimeout(bufferTimer);
bufferTimer = setTimeout(testBuffer, 800);
},
'emptied stalled mediaerror abort suspend': function(e){
if(e.type == 'emptied'){
lastBuffered = false;
}
clearTimeout(bufferTimer);
}
})
;
if('ActiveXObject' in window && $.prop(this, 'paused') && !$.prop(this, 'readyState') && $(this).is('audio[preload="none"][controls]:not([autoplay],.nonnative-api-active)')){
$(this).prop('preload', 'metadata').mediaLoad();
}
};
})();
webshims.addReady(function(context, insertedElement){
$('video, audio', context)
.add(insertedElement.filter('video, audio'))
.each(fixBuffered)
.each(fixProgressEvent)
;
});
});