CSSStyleRule.js

//.CommonJS
var CSSOM = {
	CSSStyleDeclaration: require("./CSSStyleDeclaration").CSSStyleDeclaration,
	CSSRule: require("./CSSRule").CSSRule
};
///CommonJS


/**
 * @constructor
 * @see http://dev.w3.org/csswg/cssom/#cssstylerule
 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleRule
 */
CSSOM.CSSStyleRule = function CSSStyleRule() {
	CSSOM.CSSRule.call(this);
	this.selectorText = "";
	this.style = new CSSOM.CSSStyleDeclaration;
	this.style.parentRule = this;
};

CSSOM.CSSStyleRule.prototype = new CSSOM.CSSRule;
CSSOM.CSSStyleRule.prototype.constructor = CSSOM.CSSStyleRule;
CSSOM.CSSStyleRule.prototype.type = 1;

Object.defineProperty(CSSOM.CSSStyleRule.prototype, "cssText", {
	get: function() {
		var text;
		if (this.selectorText) {
			text = this.selectorText + " {" + this.style.cssText + "}";
		} else {
			text = "";
		}
		return text;
	},
	set: function(cssText) {
		var rule = CSSOM.CSSStyleRule.parse(cssText);
		this.style = rule.style;
		this.selectorText = rule.selectorText;
	}
});


/**
 * NON-STANDARD
 * lightweight version of parse.js.
 * @param {string} ruleText
 * @return CSSStyleRule
 */
CSSOM.CSSStyleRule.parse = function(ruleText) {
	var i = 0;
	var state = "selector";
	var index;
	var j = i;
	var buffer = "";

	var SIGNIFICANT_WHITESPACE = {
		"selector": true,
		"value": true
	};

	var styleRule = new CSSOM.CSSStyleRule;
	var selector, name, value, priority="";

	for (var character; character = ruleText.charAt(i); i++) {

		switch (character) {

		case " ":
		case "\t":
		case "\r":
		case "\n":
		case "\f":
			if (SIGNIFICANT_WHITESPACE[state]) {
				// Squash 2 or more white-spaces in the row into 1
				switch (ruleText.charAt(i - 1)) {
					case " ":
					case "\t":
					case "\r":
					case "\n":
					case "\f":
						break;
					default:
						buffer += " ";
						break;
				}
			}
			break;

		// String
		case '"':
			j = i + 1;
			index = ruleText.indexOf('"', j) + 1;
			if (!index) {
				throw '" is missing';
			}
			buffer += ruleText.slice(i, index);
			i = index - 1;
			break;

		case "'":
			j = i + 1;
			index = ruleText.indexOf("'", j) + 1;
			if (!index) {
				throw "' is missing";
			}
			buffer += ruleText.slice(i, index);
			i = index - 1;
			break;

		// Comment
		case "/":
			if (ruleText.charAt(i + 1) === "*") {
				i += 2;
				index = ruleText.indexOf("*/", i);
				if (index === -1) {
					throw new SyntaxError("Missing */");
				} else {
					i = index + 1;
				}
			} else {
				buffer += character;
			}
			break;

		case "{":
			if (state === "selector") {
				styleRule.selectorText = buffer.trim();
				buffer = "";
				state = "name";
			}
			break;

		case ":":
			if (state === "name") {
				name = buffer.trim();
				buffer = "";
				state = "value";
			} else {
				buffer += character;
			}
			break;

		case "!":
			if (state === "value" && ruleText.indexOf("!important", i) === i) {
				priority = "important";
				i += "important".length;
			} else {
				buffer += character;
			}
			break;

		case ";":
			if (state === "value") {
				styleRule.style.setProperty(name, buffer.trim(), priority);
				priority = "";
				buffer = "";
				state = "name";
			} else {
				buffer += character;
			}
			break;

		case "}":
			if (state === "value") {
				styleRule.style.setProperty(name, buffer.trim(), priority);
				priority = "";
				buffer = "";
			} else if (state === "name") {
				break;
			} else {
				buffer += character;
			}
			state = "selector";
			break;

		default:
			buffer += character;
			break;

		}
	}

	return styleRule;

};


//.CommonJS
exports.CSSStyleRule = CSSOM.CSSStyleRule;
///CommonJS