Lazy Embedded Video

Lazy load embedded videos from Youtube/Dailymotion/Vimeo/Rutube/Twitch/Ustream/Coub/Vine/Facebook
Από την 23/06/2016. Δείτε την τελευταία έκδοση.
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Αναδίπλωση γραμμών
// ==UserScript==
// @name        Lazy Embedded Video
// @namespace   [email protected]
// @description Lazy load embedded videos from Youtube/Dailymotion/Vimeo/Rutube/Twitch/Ustream/Coub/Vine/Facebook
// @version     2.7
// @include     *
// @resource    playIcon https://i.imgur.com/1aybyWN.png
// @grant       GM_getResourceURL
// @run-at      document-start
// ==/UserScript==

(function() {
	try {
		if(/^([^.]+\.)?(youtube|dailymotion|vimeo|rutube|twitch|ustream|coub|vine|facebook)\.[^.]+$/.test(top.location.hostname))
			return;
	} catch(e) {}
	var wnd = typeof(unsafeWindow) != "undefined" ? unsafeWindow : window;
	var getResourceURL = typeof(GM_getResourceURL) != "undefined" ? GM_getResourceURL :
	function(name) {
		switch(name) {
		case "playIcon" : return "//i.imgur.com/1aybyWN.png";
		}
	};
	
	var CSP = -1;
    var testCSP = function() {
		if(CSP == -1) {
			var script = document.createElement("SCRIPT");
			script.innerHTML = "CSP_AllowInlineScript = true;";
			document.head.appendChild(script);
			document.head.removeChild(script);
			CSP = wnd.CSP_AllowInlineScript ? 1 : 0;
		}
		return CSP;
    };
	
    var html, a;
	var createHtml = function(url, iframe, api, background_img) {
		/(.*\/\/(?:[^.\/]+\.)?([^.\/]+)\.[^.\/]+)\//i.test(url);
		var provider_url = RegExp.$1, provider_name = RegExp.$2, data_convert = "", extra_script = "", button_hsb = [];
		if(api.includes("yahooapis"))
			data_convert += "data = data.query.results.json;";
		switch(provider_name) {
		case "youtube" :
			button_hsb.push(  0, 100, 100);
			data_convert += "delete data.thumbnail_url;";
			extra_script += "var img    = new Image();"+
							"img.onload = function() {"+
								"if(this.naturalWidth > 120) {"+
									"document.body.style.backgroundImage = 'url('+this.src+')';"+
									"if(this.src.includes('hqdefault_live'))"+
										"this.src = this.src.replace('hqdefault', 'maxresdefault');"+
								"} else if(this.src.includes('maxresdefault')) {"+
									"this.src = this.src.replace('maxresdefault', 'sddefault');"+
								"} else if(this.src.includes('hqdefault_live')) {"+
									"this.src = this.src.replace('hqdefault_live', 'maxresdefault');"+
								"}"+
							"};"+
							"img.src    = '"+background_img.match(/\/(.+)\//)[0]+"hqdefault_live.jpg';";
			break;
		case "dailymotion" :
			button_hsb.push( 60,  30, 300);
			data_convert += "var img    = new Image();"+
							"img.onload = function() { document.body.style.backgroundImage = 'url('+this.src+')'; };"+
							"img.src    = removeProtocol(data.thumbnail_url.replace(/\\/x240[^.]+/i, ''));"+
							"delete data.thumbnail_url;";
			break;
        case "vimeo" :
			button_hsb.push(220,  50, 220);
			data_convert += "data.thumbnail_url = data.thumbnail_url.replace(/_\\d+/i, '');";
            break;
        case "rutube" :
			button_hsb.push(  0,   0, 100);
			data_convert += "data.thumbnail_url = data.thumbnail_url.replace(/\\?.+/i, '');";
            break;
		case "twitch" :
			button_hsb.push(270,  50, 100);
			if(background_img) { // channel live
				data_convert += "data.title         = data.status || 'Untitled Broadcast';"+
								"data.author_url    = '"+provider_url+"/'+data.name+'/profile';"+
								"data.author_name   = data.display_name;"+
								"data.duration      = data.game && 'playing <a target=_blank href=\""+provider_url+
													"/directory/game/'+data.game+'\">'+data.game+'</b>';"+
					            "offline_image      = data.video_banner;";
				extra_script += "function jsonpCallback2(data) {"+
									"if(data.streams.length != 0) return;"+
									"document.body.style.backgroundImage             = 'url('+removeProtocol(offline_image)+')';"+
									"document.getElementById('duration').textContent = 'offline';"+
								"}"+
					        "</script>"+
					        "<script defer src='https://api.twitch.tv/kraken/streams?channel="+url.match(/[^\/]+$/)[0]+"&callback=jsonpCallback2'>";
			} else { // video recorded
				data_convert += "data.thumbnail_url = data.preview.replace(/\\d+x\\d+/i, '0x0');"+
								"data.author_url    = '"+provider_url+"/'+data.channel.name+'/profile';"+
								"data.author_name   = data.channel.display_name;"+
								"data.duration      = data.length;";
			}
			break;
		case "ustream" :
			button_hsb.push( 40,  50, 230);
			if(background_img) // channel live
				data_convert += "delete data.thumbnail_url;";
			break;
		case "coub" :
			button_hsb.push(240, 150, 100);
			data_convert += "data.author_url = data.channel_url;";
			break;
		case "vine" :
			button_hsb.push(170, 150, 150);
			break;
		case "facebook" :
			button_hsb.push(  0,   0, 300);
			data_convert += "if(/<a.*?>(.+)<\\/a><p>/i.test(data.html))"+
								"data.title = RegExp.$1;";
			break;
		}
		if(!html) html = [
			"<!doctype html>"+
			"<html>"+
				"<head>"+
					"<title>Lazy Embedded Video</title>"+
					"<script defer src='", api, "&callback=jsonpCallback'></script>"+
					"<script>"+
						"function removeProtocol(url) { return url.replace(/^[a-z]+:/i, ''); };"+
						"function jsonpCallback(data) {",
							data_convert,
							"if(data.thumbnail_url) document.body.style.backgroundImage           = 'url('+removeProtocol(data.thumbnail_url)+')';"+
							"if(data.url)           document.getElementById('title').href         = removeProtocol(data.url);"+
							"if(data.title)         document.getElementById('title').textContent  = "+
							                       "document.getElementById('title').title        = data.title;"+
							"if(data.author_url)    document.getElementById('author').href        = removeProtocol(data.author_url);"+
							"if(data.author_name)   document.getElementById('author').textContent = data.author_name;"+
							"if(data.duration) {"+
								"if(Number(data.duration))"+
									 "document.getElementById('duration').textContent = new Date(data.duration*1000).toISOString().substr(11,8);"+
								"else document.getElementById('duration').innerHTML   = data.duration;"+
							"}"+
						"}",
						extra_script,
					"</script>"+
					"<style>"+
						"html { height:100%; }"+
						"body { margin:0; height:100%; color:white; font:14px sans-serif;"+
								"background:black ", background_img, " center/100% no-repeat; }"+
						"a { color:inherit; font-weight:bold; text-decoration:none; }"+
						"a:hover { text-decoration:underline; }"+
						"ul { margin:0; padding:0; list-style:none; }"+
						"#infobar { position:absolute; top:0px; width:100%; padding:8px 16px;"+
									"box-sizing:border-box; background:rgba(0,0,0,0.5); word-wrap:break-word; }"+
						"#infobar_right { float:right; margin-left:16px; text-align:right; text-transform:capitalize; }"+
						"#button { height:100%; cursor:pointer; background-position:0px 50%; }"+
						"#button:hover { background-position:-70px 50%;"+
										(navigator.userAgent.includes("Firefox") ? "" : "-webkit-")+"filter:"+
										"hue-rotate(", button_hsb[0], "deg) saturate(", button_hsb[1], "%) brightness(", button_hsb[2], "%);}"+
						"#button > div { width:70px; height:100%; margin:auto; background-repeat:no-repeat; background-position:inherit; "+
										"background-image:url("+getResourceURL("playIcon")+"); }"+
						"#titleBlock { overflow:hidden; max-height:34px; }"+
					"</style>"+
				"</head>"+
				"<body>"+
					"<div id=button onclick='location.replace(\"", iframe, "\");'><div></div></div>"+
					"<div id=infobar>"+
						"<ul id=infobar_right>"+
							"<li><a id=author target=_blank></a></li>"+
							"<li><a id=provider target=_blank href='", provider_url, "'>", provider_name, "</a></li>"+
						"</ul>"+
						"<ul>"+
							"<li id=titleBlock><a id=title target=_blank href='", url, "'>", url, "</a></li>"+
							"<li id=duration></li>"+
						"</ul>"+
					"</div>"+
				"</body>"+
			"</html>"
		];
		html[ 1] = api;
		html[ 3] = data_convert;
		html[ 5] = extra_script;
		html[ 7] = background_img;
		html[ 9] = button_hsb[0];
		html[11] = button_hsb[1];
		html[13] = button_hsb[2];
		html[15] = iframe;
		html[17] = provider_url;
		html[19] = provider_name;
		html[21] = url;
		html[23] = url;
	};
	
	var createOembed   = function(api, url) { return api+encodeURIComponent(url); };
	var createNOembed  = function(api, url) { return createOembed("//noembed.com/embed?url=", url); };
	var createYOembed  = function(api, url) { return createOembed("//query.yahooapis.com/v1/public/yql?format=json&q=",
											 'SELECT * FROM json WHERE url="'+createOembed(location.protocol+api,url)+'"'); };
	
	var createLazyVideo = function(elem) {
		if(elem.tagName == "IFRAME" && elem.srcdoc) return true;
        var id, args, url = elem.src || elem.data || elem.dataset.src;
        if(!url) return true;
        if(!a) a = document.createElement("A");
        a.href = url;
		/([^.]+)\.[^.]+$/i.test(a.hostname);
        switch(RegExp.$1) {
        case "youtube" :
            if(/\/(?:v|embed)\/([^&]*)/i.test(a.pathname))
				id = RegExp.$1 || (/[?&]v=([^&]+)/i.test(a.search) && RegExp.$1);
            if(!id || !testCSP()) return !id;
            args = "?autoplay=1";
            if(/[?&](list=[^&]+)/i.test(a.search))  args += "&"+RegExp.$1;
            if(/[?&](start=[^&]+)/i.test(a.search)) args += "&"+RegExp.$1;
			createHtml(url =
				"//www.youtube.com/watch"+args+"&v="+id,
				"//www.youtube.com/embed/"+id+args,
				createNOembed("//www.youtube.com/oembed?format=json&url=", location.protocol+url),
				"url(//i.ytimg.com/vi/"+id+"/hqdefault.jpg)"
			);
            break;
        case "dailymotion" :
            if(/\/(?:swf|embed)\/video\/([^&_]+)/i.test(a.pathname)) id = RegExp.$1;
            if(!id || !testCSP()) return !id;
            args = "?autoplay=1";
            if(/[?&](mute=[^&]+)/i.test(a.search))  args += "&"+RegExp.$1;
            if(/[?&](start=[^&]+)/i.test(a.search)) args += "&"+RegExp.$1;
			createHtml(url =
				"//www.dailymotion.com/video/"+id+args,
				"//www.dailymotion.com/embed/video/"+id+args,
				createOembed("//www.dailymotion.com/services/oembed?format=json&url=", location.protocol+url),
				"url(//www.dailymotion.com/thumbnail/video/"+id+")"
			);
            break;
        case "vimeo" :
            if(/\/(?:moogaloop\.swf|video\/)([^&]*)/i.test(a.pathname))
				id = RegExp.$1 || (/[?&]clip_id=([^&]+)/i.test(a.search) && RegExp.$1);
            if(!id || !testCSP()) return !id;
            args = "?autoplay=1";
            if(/[?&](loop=[^&]+)/i.test(a.search)) args += "&"+RegExp.$1;
            if(/(\#t=[\dhms]+)/i.test(a.hash))     args += RegExp.$1;
			createHtml(url =
				"//vimeo.com/"+id+args,
				"//player.vimeo.com/video/"+id+args,
				createOembed("//vimeo.com/api/oembed.json?url=", url)
			);
            break;
        case "rutube" :
            if(/\/play\/embed\/([^&.\/]+)/i.test(a.pathname)) id = RegExp.$1;
            if(!id || !testCSP()) return !id;
            args = "?autoStart=1";
            if(/[?&](bmstart=[^&]+)/i.test(a.search)) args += "&"+RegExp.$1;
			createHtml(url =
				"//rutube.ru/"+(isNaN(id) ? "video/"+id+"/" : "tracks/"+id+".html/")+args,
				"//rutube.ru/play/embed/"+id+args,
				createOembed("//rutube.ru/api/oembed/?format=jsonp&url=", url)
			);
            break;
        case "twitch" :
            if(/[?&](channel|video)=([^&]+)/i.test(a.search)) {args = RegExp.$1; id = RegExp.$2;}
			else if(/\/(.+)\/embed/i.test(a.pathname))        {args = "channel"; id = RegExp.$1;}
            if(!id || !testCSP()) return !id;
			createHtml(url =
				"//www.twitch.tv/"+(args=="video" ? id.replace("v","c/v/") : id),
				"//player.twitch.tv/?autoplay=true&"+args+"="+id,
				"https://api.twitch.tv/kraken/"+args+"s/"+id+"?",
				args=="channel" ? "url(//static-cdn.jtvnw.net/previews-ttv/live_user_"+id+"-0x0.jpg)" : null
			);
            break;
        case "ustream" :
            if(/(?:\/embed)?\/(channel\/|recorded\/)?([^&]+)/i.test(a.pathname)) {args = RegExp.$1 || "channel/"; id = RegExp.$2;}
            if(!id || !testCSP()) return !id;
			createHtml(url =
				"//www.ustream.tv/"+args+id,
				"//www.ustream.tv/embed/"+(args=="channel/" ? "" : args)+id+"?html5ui=1&autoplay=1",
				createYOembed("//www.ustream.tv/oembed?format=json&url=", url),
				args=="channel/" && !isNaN(id) ? "url(//static-cdn1.ustream.tv/i/channel/live/1_"+id+",640x360,b:0.jpg)" : null
			);
            break;
        case "coub" :
            if(/\/embed\/([^&]+)/i.test(a.pathname)) id = RegExp.$1;
            if(!id || !testCSP()) return !id;
			createHtml(url =
				"//coub.com/view/"+id,
				"//coub.com/embed/"+id+"?startWithHD=true&autostart=true",
				createYOembed("//coub.com/api/oembed.json?url=", url)
			);
            break;
        case "vine" :
            if(/\/v\/([^&]+)\/embed\/([^&]+)/i.test(a.pathname)) {args = RegExp.$2; id = RegExp.$1;}
            if(!id || !testCSP()) return !id;
			createHtml(url =
				"//vine.co/v/"+id,
				"//vine.co/v/"+id+"/embed/"+args+"?audio=1",
				createOembed("//vine.co/oembed.json?url=", url)
			);
            break;
        case "facebook" :
            if(a.pathname.endsWith("/plugins/video.php") && /[?&]href=([^&]+)/i.test(a.search)) {
				url = decodeURIComponent(RegExp.$1).replace(/^[a-z]+:/i, '');
				if(/\/videos.*?\/(\d+)/i.test(url)) id = RegExp.$1;
			}
            if(!id || !testCSP()) return !id;
			createHtml(
				url,
				"//www.facebook.com/plugins/video.php?autoplay=1&href="+encodeURIComponent(location.protocol+url),
				createOembed("//www.facebook.com/plugins/video/oembed.json/?url=", location.protocol+url),
				"url(//graph.facebook.com/"+id+"/picture)"
			);
            break;
        default :
            return true;
        }
		if(elem.tagName != "IFRAME") {
			var iframe = document.createElement("IFRAME");
			iframe.id            = elem.id;
			iframe.className     = elem.className;
			iframe.style.cssText = elem.style.cssText;
			if(!iframe.style.width  && elem.width ) iframe.style.width  = elem.width+"px";
			if(!iframe.style.height && elem.height) iframe.style.height = elem.height+"px";
			if(elem.parentNode.tagName == "OBJECT") {
				elem = elem.parentNode;
				iframe.style.cssText = elem.style.cssText + iframe.style.cssText;
				if(!iframe.style.width  && elem.width ) iframe.style.width  = elem.width+"px";
				if(!iframe.style.height && elem.height) iframe.style.height = elem.height+"px";
			}
			if(!iframe.style.borderWidth)       iframe.style.borderWidth   = (elem.border||0)+"px";
			switch(elem.align) {
			case "left" : case "right" :
				if(!iframe.style.float)         iframe.style.float         = elem.align; break;
			case "top" : case "middle" : case "bottom" :
				if(!iframe.style.verticalAlign) iframe.style.verticalAlign = elem.align; break;
			}
			elem.parentNode.replaceChild(iframe, elem);
			elem = iframe;
		}
		elem.allowFullscreen = true;
		elem.srcdoc = html.join("");
        return true;
	};
	
	var update = function() {
		// convert NodeList to Array because for some reason sometimes I wasn't able to read src when iterating directly through NodeList
		var nodes = ["IFRAME", "EMBED", "OBJECT"].reduce(function(sum, value) {
			return sum.concat([].slice.call(document.getElementsByTagName(value)));
		}, frameElement ? [frameElement] : []);
		for(var	i = 0; i < nodes.length; i++)
			if(!createLazyVideo(nodes[i])) return;
		if(document.readyState == "loading") requestAnimationFrame(update);
	};
	update();
})();