Provides

Slick.Parser

Standalone CSS3 Selector parser

(function(){

var parsed,
	separatorIndex,
	combinatorIndex,
	reversed,
	cache = {},
	reverseCache = {},
	reUnescape = /\\/g;

var parse = function(expression, isReversed){
	if (expression == null) return null;
	if (expression.Slick === true) return expression;
	expression = ('' + expression).replace(/^\s+|\s+$/g, '');
	reversed = !!isReversed;
	var currentCache = (reversed) ? reverseCache : cache;
	if (currentCache[expression]) return currentCache[expression];
	parsed = {Slick: true, expressions: [], raw: expression, reverse: function(){
		return parse(this.raw, true);
	}};
	separatorIndex = -1;
	while (expression != (expression = expression.replace(regexp, parser)));
	parsed.length = parsed.expressions.length;
	return currentCache[expression] = (reversed) ? reverse(parsed) : parsed;
};

var reverseCombinator = function(combinator){
	if (combinator === '!') return ' ';
	else if (combinator === ' ') return '!';
	else if ((/^!/).test(combinator)) return combinator.replace(/^!/, '');
	else return '!' + combinator;
};

var reverse = function(expression){
	var expressions = expression.expressions;
	for (var i = 0; i < expressions.length; i++){
		var exp = expressions[i];
		var last = {parts: [], tag: '*', combinator: reverseCombinator(exp[0].combinator)};

		for (var j = 0; j < exp.length; j++){
			var cexp = exp[j];
			if (!cexp.reverseCombinator) cexp.reverseCombinator = ' ';
			cexp.combinator = cexp.reverseCombinator;
			delete cexp.reverseCombinator;
		}

		exp.reverse().push(last);
	}
	return expression;
};

var escapeRegExp = function(string){// Credit: XRegExp 0.6.1 (c) 2007-2008 Steven Levithan <http://stevenlevithan.com/regex/xregexp/> MIT License
	return string.replace(/[-[\]{}()*+?.\\^$|,#\s]/g, "\\$&");
};

var regexp = new RegExp(

!/usr/bin/env ruby

puts “\t\t” + DATA.read.gsub(/(\?x)|\s+#.$|\s+|\$|\n/,‘’) END “(?x)^(?:\ \s ( , ) \s # Separator \n\ | \s ( + ) \s # Combinator \n\ | ( \s+ ) # CombinatorChildren \n\ | ( + | \ ) # Tag \n\ | \# ( + ) # ID \n\ | \. ( + ) # ClassName \n\ | # Attribute \n\ \[ \ \s (+) (?: \ \s ([^$!~|]?=) (?: \ \s (?:\ ([\”‘]?)(.?)\9 \ )\ ) \ )? \s \ \](?!\]) \n\ | :+ ( + )(?:\ $ (?:\ (?:([\“’])([^{\12]*)\12)|((?:\([^{)]+$|[^()]*)+)\}} ) \)\ )?\ )”

"^(?:\\s*(,)\\s*|\\s*(<combinator>+)\\s*|(\\s+)|(<unicode>+|\\*)|\\#(<unicode>+)|\\.(<unicode>+)|\\[\\s*(<unicode1>+)(?:\\s*([*^$!~|]?=)(?:\\s*(?:([\"']?)(.*?)\\9)))?\\s*\\](?!\\])|:+(<unicode>+)(?:\\((?:(?:([\"'])([^\\12]*)\\12)|((?:\\([^)]+\\)|[^()]*)+))\\))?)"
	.replace(/<combinator>/, '[' + escapeRegExp(">+~`!@$%^&={}\\;</") + ']')
	.replace(/<unicode>/g, '(?:[\\w\\u00a1-\\uFFFF-]|\\\\[^\\s0-9a-f])')
	.replace(/<unicode1>/g, '(?:[:\\w\\u00a1-\\uFFFF-]|\\\\[^\\s0-9a-f])')
);

function parser(
	rawMatch,

	separator,
	combinator,
	combinatorChildren,

	tagName,
	id,
	className,

	attributeKey,
	attributeOperator,
	attributeQuote,
	attributeValue,

	pseudoClass,
	pseudoQuote,
	pseudoClassQuotedValue,
	pseudoClassValue
){
	if (separator || separatorIndex === -1){
		parsed.expressions[++separatorIndex] = [];
		combinatorIndex = -1;
		if (separator) return '';
	}

	if (combinator || combinatorChildren || combinatorIndex === -1){
		combinator = combinator || ' ';
		var currentSeparator = parsed.expressions[separatorIndex];
		if (reversed && currentSeparator[combinatorIndex])
			currentSeparator[combinatorIndex].reverseCombinator = reverseCombinator(combinator);
		currentSeparator[++combinatorIndex] = {combinator: combinator, tag: '*'};
	}

	var currentParsed = parsed.expressions[separatorIndex][combinatorIndex];

	if (tagName){
		currentParsed.tag = tagName.replace(reUnescape, '');

	} else if (id){
		currentParsed.id = id.replace(reUnescape, '');

	} else if (className){
		className = className.replace(reUnescape, '');

		if (!currentParsed.classList) currentParsed.classList = [];
		if (!currentParsed.classes) currentParsed.classes = [];
		currentParsed.classList.push(className);
		currentParsed.classes.push({
			value: className,
			regexp: new RegExp('(^|\\s)' + escapeRegExp(className) + '(\\s|$)')
		});

	} else if (pseudoClass){
		pseudoClassValue = pseudoClassValue || pseudoClassQuotedValue;
		pseudoClassValue = pseudoClassValue ? pseudoClassValue.replace(reUnescape, '') : null;

		if (!currentParsed.pseudos) currentParsed.pseudos = [];
		currentParsed.pseudos.push({
			key: pseudoClass.replace(reUnescape, ''),
			value: pseudoClassValue
		});

	} else if (attributeKey){
		attributeKey = attributeKey.replace(reUnescape, '');
		attributeValue = (attributeValue || '').replace(reUnescape, '');

		var test, regexp;

		switch (attributeOperator){
			case '^=' : regexp = new RegExp(       '^'+ escapeRegExp(attributeValue)            ); break;
			case '$=' : regexp = new RegExp(            escapeRegExp(attributeValue) +'$'       ); break;
			case '~=' : regexp = new RegExp( '(^|\\s)'+ escapeRegExp(attributeValue) +'(\\s|$)' ); break;
			case '|=' : regexp = new RegExp(       '^'+ escapeRegExp(attributeValue) +'(-|$)'   ); break;
			case  '=' : test = function(value){
				return attributeValue == value;
			}; break;
			case '*=' : test = function(value){
				return value && value.indexOf(attributeValue) > -1;
			}; break;
			case '!=' : test = function(value){
				return attributeValue != value;
			}; break;
			default   : test = function(value){
				return !!value;
			};
		}

		if (attributeValue == '' && (/^[*$^]=$/).test(attributeOperator)) test = function(){
			return false;
		};

		if (!test) test = function(value){
			return value && regexp.test(value);
		};

		if (!currentParsed.attributes) currentParsed.attributes = [];
		currentParsed.attributes.push({
			key: attributeKey,
			operator: attributeOperator,
			value: attributeValue,
			test: test
		});

	}

	return '';
};

Slick NS

var Slick = (this.Slick || {});

Slick.parse = function(expression){
	return parse(expression);
};

Slick.escapeRegExp = escapeRegExp;

if (!this.Slick) this.Slick = Slick;

}).apply(/*<CommonJS>*/(typeof exports != 'undefined') ? exports : /*</CommonJS>*/this);