pwa
/
Lungo2.0.js
зеркало из https://github.com/xabstract/Lungo2.0.js.git


			
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							<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>CSSOM.js parse method</title>
	<script>
	var exports = {};
	function require(){
		return exports;
	}
	</script>
	<script src="../lib/CSSStyleDeclaration.js"></script>
	<script src="../lib/CSSRule.js"></script>
	<script src="../lib/CSSStyleRule.js"></script>
	<script src="../lib/CSSImportRule.js"></script>
	<script src="../lib/MediaList.js"></script>
	<script src="../lib/CSSMediaRule.js"></script>
	<script src="../lib/StyleSheet.js"></script>
	<script src="../lib/CSSStyleSheet.js"></script>
	<script src="../lib/parse.js"></script>
	<script>
	window.CSSOM = exports;
	</script>
	<style>
	html {
		padding: 0;
	}
	</style>
	<style type="text/css">
	html, body {
		background: #333;
		color: #EEE;
		font: 12px sans-serif;
		margin: 0;
		height: 100%;
	}
	body {
		padding-bottom: 1.7em;
		-webkit-box-sizing: border-box;
		-moz-box-sizing: border-box;
		box-sizing: border-box;
	}
	table {
		width: 100%;
		table-layout: fixed;
		margin: 0 auto;
	}
	td {
		vertical-align: top;
	}
	h1 {
		font: normal 1em sans-serif;
		display: inline;
	}
	#labels {
		color: #FFE992;
		width: 66%;
	}
	#labels td {
		width: 50%;
		text-align: center;
	}
	#labels td::before {
		content: '↱ ';
		color: #998e62;
		position: relative;
		top: .4em;
	}
	#labels td::after {
		content: ' ↴';
		color: #998e62;
		position: relative;
		top: .4em;
	}
	#content {
		width: 100%;
		height: 100%;
	}
	#content td {
		width: 33%;
	}
	#content td + td {
		padding-left: 1%;
	}
	.style-cell textarea {
		width: 99%;
		height: 100%;
		font: 12px monospace;
		white-space: pre-wrap;
	}
	.serialized-cell {
		border-left: 1px solid #363636;
	}
	#message {
		visibility: hidden;
	}
	.error #message {
		visibility: visible;
		position: absolute;
		top: 0;
		left: 34%;
		padding: 1em;
		background: black;
		color: #e34343;
		font-size: 24px;
	}
	</style>
</head>
<body>
<table id="labels">
	<tr><td><h1>CSSOM.parse</h1></td><td>.toString</td></tr>
</table>
<table id="content">
	<tr>
		<td class="style-cell">
<textarea id="style" spellcheck="false" rows="40">img {
  border: none
}</textarea></td>
		<td class="output-cell"><pre id="output"></pre></td>
		<td class="serialized-cell"><pre id="serialized"></pre></td>
	</tr>
</table>
<div id="message"></div>
<script defer>
console.dir(document.styleSheets[0].cssRules[0].style);
//console.log(document.styleSheets[0].cssRules[0].style["table-layout"]);
var CSS = {
	background: [
		"background-image",
		"background-repeat",
		"background-attachment",
		"background-position",
		"background-origin",
		"background-clip",
		"background-color"
	],
	"background-repeat": [
		"background-repeat-x",
		"background-repeat-y"
	],
	"background-position": [
		"background-position-x",
		"background-position-y"
	],
	border: [
		"border-top",
		"border-right",
		"border-bottom",
		"border-left",
		"border-width",
		"border-style",
		"border-color"
	],
	"border-top": [
		"border-top-width",
		"border-top-style",
		"border-top-color"
	],
	"border-right": [
		"border-right-width",
		"border-right-style",
		"border-right-color"
	],
	"border-bottom": [
		"border-bottom-width",
		"border-bottom-style",
		"border-bottom-color"
	],
	"border-left": [
		"border-left-width",
		"border-left-style",
		"border-left-color"
	],
	font: [
		"font-style",
		"font-variant",
		"font-weight",
		"font-size",
		"font-size-adjust",
		"font-stretch",
		"line-height",
		"font-family"
	],
	"list-style": [
		"list-style-type",
		"list-style-position",
		"list-style-image"
	],
	margin: [
		"margin-top",
		"margin-right",
		"margin-bottom",
		"margin-left"
	],
	padding: [
		"padding-top",
		"padding-right",
		"padding-bottom",
		"padding-left"
	]
};

function camelize(string) {
	return string.replace(/-+(.)?/g, function(match, chr) {
		return chr ? chr.toUpperCase() : '';
	});
}

CSS["background-repeat"].shorthand = function(style) {
	if (style["background-repeat-x"] == style["background-repeat-y"]) {
		return style["background-repeat-x"];
	} else {
		return style["background-repeat-x"] + " " + style["background-repeat-y"];
	}
};

CSS["background-position"].shorthand = function(style) {
	if (style["background-position-x"] == style["background-position-y"]) {
		return style["background-position-x"];
	} else {
		return style["background-position-x"] + " " + style["background-position-y"];
	}
};

CSS.background.shorthand = function(style) {
	var values = [];

	//FIXME
	// Support CSS3 background shorthand
	// http://www.w3.org/TR/css3-background/#the-background

	var backgroundColor = style["background-color"];
	if (backgroundColor != "initial" && backgroundColor != "transparent") {
		values.push(backgroundColor);
	}

	var backgroundImage = style["background-image"];
	if (backgroundImage != "initial" && backgroundImage != "none") {
		values.push(backgroundImage);
	}

	var backgroundRepeat = style["background-repeat"];
	if (backgroundRepeat != "initial" && backgroundRepeat != "repeat") {
		values.push(backgroundRepeat);
	}

	var backgroundAttachment = style["background-attachment"];
	if (backgroundAttachment != "initial" && backgroundAttachment != "scroll") {
		values.push(backgroundAttachment);
	}

	var backgroundPosition = style["background-position"];
	if (backgroundPosition != "initial" && parseInt(backgroundPosition) !== 0) {
		values.push(backgroundPosition);
	}

	return values.join(" ") || "";
};


(function(){
	for (var key in CSS) {
		var longhand = CSS[key];
		if (!longhand.length) {
			continue;
		}
		for (var i=0, ii=longhand.length; i<ii; i++) {
			var siblings = longhand.slice(0);
			siblings.splice(i, 1);
			if (CSS[longhand[i]]) {
				//console.log("array", CSS[longhand[i]]);
			} else {
				CSS[longhand[i]] = {}
			}
			CSS[longhand[i]].parent = key;
			CSS[longhand[i]].siblings = siblings;
		}
	}
})();


function cloneMinimized(stylesheet) {
	var cloned = new CSSOM.CSSStyleSheet;

	var rules = stylesheet.cssRules;
	if (!rules) {
		return cloned;
	}

	var RULE_TYPES = {
		1: CSSOM.CSSStyleRule,
		4: CSSOM.CSSMediaRule
		//FIXME
		//3: CSSOM.CSSImportRule,
		//5: CSSOM.CSSFontFaceRule,
		//6: CSSOM.CSSPageRule,
	};

	for (var i=0, rulesLength=rules.length; i < rulesLength; i++) {
		var rule = rules[i];
		var ruleClone = cloned.cssRules[i] = new RULE_TYPES[rule.type];

		var style = rule.style;
		if (style) {
			var styleClone = ruleClone.style = minimizeStyle(style);
		}

		if ("selectorText" in rule) {
			ruleClone.selectorText = rule.selectorText;
		}

		if ("mediaText" in rule) {
			ruleClone.mediaText = rule.mediaText;
		}

		if ("cssRules" in rule) {
			rule.cssRules = clone(rule).cssRules;
		}
	}

	return cloned;

};

function minimizeStyle(style) {
	var result = new CSSOM.CSSStyleDeclaration;
	for (var i=0; i<style.length; i++) {
		var name = closestShorthand(style, style[i]);
		if (!(name in result)) {
			result[name] = style[camelize(name)];
			result[result.length++] = name;
		}
	}
	return result;
}

function closestShorthand(style, name) {
	if (!(name in CSS)) {
		return name;
	}
	var siblings = CSS[name].siblings;
	if (!siblings || !siblings.length) {
		return name;
	}
	var properties = {};
	var allPresent = true;
	for (var j=0; j<siblings.length; j++) {
		var sibling = siblings[j];
		var aSibling = camelize(sibling);
		if (style[aSibling] === "") {
			console.warn(sibling);
			if (CSS[sibling].length) {
				for (var i=0; i<CSS[sibling].length; i++) {
					if (style[camelize(CSS[sibling][i])] === "") {
						allPresent = false;
						break;
					}
				}
			} else {
				allPresent = false;
				break;
			}
		}
	}
	if (allPresent) {
		return closestShorthand(style, CSS[name].parent);
	} else {
		return name;
	}

}

console.log(cloneMinimized(document.styleSheets[0]).toString());
//console.log(CSSOM.CSSStyleSheet.prototype.toString.call(minimize(document.styleSheets[0].cssRules[0].style)));
//console.log(document.styleSheets[0].cssRules[0].style["background-image"]);

//console.log(CSS);


var errors = [];
//if (!Object.defineProperty) {
//	errors.push("Object.defineProperty isn’t supported");
//}
if (errors.length) {
	document.getElementById("message").innerHTML = errors.join("<br>");
	document.body.className = "error";
	throw errors.join("\n\n");
}

var style = document.getElementById("style");
var output = document.getElementById("output");
var serialized = document.getElementById("serialized");

function outputUpdated(){
	var value = style.value;
	if (value != style.prevValue) {
		var css = CSSOM.parse(value);
		output.innerHTML = JSON.stringify(css, null, 2);
		serialized.innerHTML = css.toString();
		style.prevValue = value;
	}
}

function hashChanged(){
	var hash = location.hash;
	var splitted = hash.split("=");
	if (splitted.length < 2) {
		return;
	}
	var name = splitted[0];
	var value = splitted[1];
	if (name == "#css") {
		style.value = decodeURIComponent(value);
		outputUpdated();
	}
}

hashChanged();
outputUpdated();

window.onhashchange = hashChanged;
style.onkeyup = style.onpaste = function changed(){
	outputUpdated();
};
style.onchange = function updateLocation(){
	location.hash = "css=" + encodeURIComponent(style.value);
};
</script>
</body>
</html>