jorra.mediatime.1

mediatime

(function(){
    var granularity = 250, 
    matches = [], 
    farFuture = new Date().getTime() + (1000 * 60 * 60 * 24 * 2), 
    test; 

    test = function(el,o){
		cTime = el.currentTime * 1000;	
		if(cTime >= o.start){
			if(o.end === ':-media-end' && !el.ended){ return true; }
			if(cTime <= o.end){ return true; }
		}
		return false;
    };
	
	setInterval(function(){
		var match, i=0, n = 0, hasChanges, entry, rst;
		for(;i<matches.length;i++){
			match = matches[i];
            hasChanges = false;
			for(n in match['-media-time']){
				entry = match['-media-time'][n];
                rst = test(match,entry);
                if(rst != entry.result){
                	entry.result = rst;
                	match['-media-time'][n] = entry; 
                	hasChanges = true;
                }
        	
			}	
			if(hasChanges){
				match.setAttribute('data-media-timeon', new Date().getTime());
			}
		}
	},granularity);

    Hitch.add({
		name: '-media-time',
		base: 'audio,[data-media-timeon],video',
        type: 'selector',
		filter:   function(m,args){
			var times, start, end, simpleKey;
			if(!args){ return; }
			if(!m['-media-time']){ m['-media-time'] = {}; }
			if(!m['-media-time'][args]){ 
				try{
					times = args.split(",");
					start = parseInt(times[0],10);
					end  = farFuture;
					if(times.length > 1){
						if(times[1].replace(/\s/g, "") === ":-media-end"){
							end = ":-media-end";
						}else{
							end = parseInt(times[1], 10);		
						}
					}
					m['-media-time'][args] = { start: start, end: end, result: false }; 
				}catch(e){
					return;
				}
			}
			if(matches.indexOf(m) == -1){matches.push(m);}
			//console.log("xx: " + JSON.parse(m.dataset[simpleKey]).result);
			return (m['-media-time'] && m['-media-time'][args]) ? m['-media-time'][args].result : false;	
		}    
    });
}());