jquery/src/selector.js

/*
 * Sizzle CSS Selector Engine - v0.9
 *  Copyright 2009, John Resig (http://ejohn.org/)
 *  released under the MIT License
 */
(function(){

var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]+\]|[^[\]]+)+\]|\\.|[^ >+~,(\[]+)+|[>+~])(\s*,\s*)?/g;

var cache = null;
var done = 0;

if ( document.addEventListener && !document.querySelectorAll ) {
	cache = {};
	var invalidate = function(){ cache = {}; };
	document.addEventListener("DOMAttrModified", invalidate, false);
	document.addEventListener("DOMNodeInserted", invalidate, false);
	document.addEventListener("DOMNodeRemoved", invalidate, false);
}

var Sizzle = function(selector, context, results, seed) {
	var doCache = !results;
	results = results || [];
	context = context || document;

	if ( context.nodeType !== 1 && context.nodeType !== 9 )
		return [];
	
	if ( !selector || typeof selector !== "string" ) {
		return results;
	}

	if ( cache && context === document && cache[ selector ] ) {
		results.push.apply( results, cache[ selector ] );
		return results;
	}
	
	var parts = [], m, set, checkSet, check, mode, extra;
	
	// Reset the position of the chunker regexp (start from head)
	chunker.lastIndex = 0;
	
	while ( (m = chunker.exec(selector)) !== null ) {
		parts.push( m[1] );
		
		if ( m[2] ) {
			extra = RegExp.rightContext;
			break;
		}
	}

	if ( parts.length > 1 && Expr.match.POS.exec( selector ) ) {
		if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
			var later = "", match;

			// Position selectors must be done after the filter
			while ( (match = Expr.match.POS.exec( selector )) ) {
				later += match[0];
				selector = selector.replace( Expr.match.POS, "" );
			}

			set = Sizzle.filter( later, Sizzle( selector, context ) );
		} else {
			set = Expr.relative[ parts[0] ] ?
				[ context ] :
				Sizzle( parts.shift(), context );

			while ( parts.length ) {
				var tmpSet = [];

				selector = parts.shift();
				if ( Expr.relative[ selector ] )
					selector += parts.shift();

				for ( var i = 0, l = set.length; i < l; i++ ) {
					Sizzle( selector, set[i], tmpSet );
				}

				set = tmpSet;
			}
		}
	} else {
		var ret = seed ?
			{ expr: parts.pop(), set: makeArray(seed) } :
			Sizzle.find( parts.pop(), parts.length === 1 && context.parentNode ? context.parentNode : context );
		set = Sizzle.filter( ret.expr, ret.set );

		if ( parts.length > 0 ) {
			checkSet = makeArray(set);
		}

		while ( parts.length ) {
			var cur = parts.pop(), pop = cur;

			if ( !Expr.relative[ cur ] ) {
				cur = "";
			} else {
				pop = parts.pop();
			}

			if ( pop == null ) {
				pop = context;
			}

			Expr.relative[ cur ]( checkSet, pop );
		}
	}

	if ( !checkSet ) {
		checkSet = set;
	}

	if ( !checkSet ) {
		throw "Syntax error, unrecognized expression: " + (cur || selector);
	}

	if ( checkSet instanceof Array ) {
		if ( context.nodeType === 1 ) {
			for ( var i = 0; checkSet[i] != null; i++ ) {
				if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {
					results.push( set[i] );
				}
			}
		} else {
			for ( var i = 0; checkSet[i] != null; i++ ) {
				if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
					results.push( set[i] );
				}
			}
		}
	} else {
		makeArray( checkSet, results );
	}

	if ( extra ) {
		Sizzle( extra, context, results );
	}

	if ( cache && doCache ) {
		cache[selector] = results.slice(0);
	}

	return results;
};

Sizzle.matches = function(expr, set){
	return Sizzle(expr, null, null, set);
};

Sizzle.find = function(expr, context){
	var set, match;

	if ( !expr ) {
		return [];
	}

	var later = "", match;

	// Pseudo-selectors could contain other selectors (like :not)
	while ( (match = Expr.match.PSEUDO.exec( expr )) ) {
		var left = RegExp.leftContext;

		if ( left.substr( left.length - 1 ) !== "\\" ) {
			later += match[0];
			expr = expr.replace( Expr.match.PSEUDO, "" );
		} else {
			// TODO: Need a better solution, fails: .class\:foo:realfoo(#id)
			break;
		}
	}

	for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
		var type = Expr.order[i];
		
		if ( (match = Expr.match[ type ].exec( expr )) ) {
			var left = RegExp.leftContext;

			if ( left.substr( left.length - 1 ) !== "\\" ) {
				match[1] = (match[1] || "").replace(/\\/g, "");
				set = Expr.find[ type ]( match, context );

				if ( set != null ) {
					expr = expr.replace( Expr.match[ type ], "" );
					break;
				}
			}
		}
	}

	if ( !set ) {
		set = context.getElementsByTagName("*");
	}

	expr += later;

	return {set: set, expr: expr};
};

Sizzle.filter = function(expr, set, inplace){
	var old = expr, result = [], curLoop = set, match;

	while ( expr && set.length ) {
		for ( var type in Expr.filter ) {
			if ( (match = Expr.match[ type ].exec( expr )) != null ) {
				var anyFound = false, filter = Expr.filter[ type ], goodArray = null;

				if ( curLoop == result ) {
					result = [];
				}

				if ( Expr.preFilter[ type ] ) {
					match = Expr.preFilter[ type ]( match, curLoop );

					if ( match[0] === true ) {
						goodArray = [];
						var last = null, elem;
						for ( var i = 0; (elem = curLoop[i]) !== undefined; i++ ) {
							if ( elem && last !== elem ) {
								goodArray.push( elem );
								last = elem;
							}
						}
					}

				}

				var goodPos = 0, found, item;

				for ( var i = 0; (item = curLoop[i]) !== undefined; i++ ) {
					if ( item ) {
						if ( goodArray && item != goodArray[goodPos] ) {
							goodPos++;
						}

						found = filter( item, match, goodPos, goodArray );
						if ( inplace && found != null ) {
							curLoop[i] = found ? curLoop[i] : false;
							if ( found ) {
								anyFound = true;
							}
						} else if ( found ) {
							result.push( item );
							anyFound = true;
						}
					}
				}

				if ( found !== undefined ) {
					if ( !inplace ) {
						curLoop = result;
					}

					expr = expr.replace( Expr.match[ type ], "" );

					if ( !anyFound ) {
						return [];
					}

					break;
				}
			}
		}


		expr = expr.replace(/\s*,\s*/, "");

		// Improper expression
		if ( expr == old ) {
			throw "Syntax error, unrecognized expression: " + expr;
		}

		old = expr;
	}

	return curLoop;
};

var Expr = Sizzle.selectors = {
	order: [ "ID", "NAME", "TAG" ],
	match: {
		ID: /#((?:[\w\u0128-\uFFFF_-]|\\.)+)/,
		CLASS: /\.((?:[\w\u0128-\uFFFF_-]|\\.)+)/,
		NAME: /\[name=((?:[\w\u0128-\uFFFF_-]|\\.)+)\]/,
		ATTR: /\[((?:[\w\u0128-\uFFFF_-]|\\.)+)\s*(?:(\S{0,1}=)\s*(['"]*)(.*?)\3|)\]/,
		TAG: /^((?:[\w\u0128-\uFFFF\*_-]|\\.)+)/,
		CHILD: /:(only|nth|last|first)-child\(?(even|odd|[\dn+-]*)\)?/,
		POS: /:(nth|eq|gt|lt|first|last|even|odd)\(?(\d*)\)?(?:[^-]|$)/,
		PSEUDO: /:((?:[\w\u0128-\uFFFF_-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
	},
	attrMap: {
		"class": "className"
	},
	relative: {
		"+": function(checkSet, part){
			for ( var i = 0, l = checkSet.length; i < l; i++ ) {
				var elem = checkSet[i];
				if ( elem ) {
					var cur = elem.previousSibling;
					while ( cur && cur.nodeType !== 1 ) {
						cur = cur.previousSibling;
					}
					checkSet[i] = typeof part === "string" ?
						cur || false :
						cur === part;
				}
			}

			if ( typeof part === "string" ) {
				Sizzle.filter( part, checkSet, true );
			}
		},
		">": function(checkSet, part){
			if ( typeof part === "string" && !/\W/.test(part) ) {
				part = part.toUpperCase();

				for ( var i = 0, l = checkSet.length; i < l; i++ ) {
					var elem = checkSet[i];
					if ( elem ) {
						var parent = elem.parentNode;
						checkSet[i] = parent.nodeName === part ? parent : false;
					}
				}
			} else {
				for ( var i = 0, l = checkSet.length; i < l; i++ ) {
					var elem = checkSet[i];
					if ( elem ) {
						checkSet[i] = typeof part === "string" ?
							elem.parentNode :
							elem.parentNode === part;
					}
				}

				if ( typeof part === "string" ) {
					Sizzle.filter( part, checkSet, true );
				}
			}
		},
		"": function(checkSet, part){
			var doneName = "done" + (done++), checkFn = dirCheck;

			if ( !part.match(/\W/) ) {
				var nodeCheck = part = part.toUpperCase();
				checkFn = dirNodeCheck;
			}

			checkFn("parentNode", part, doneName, checkSet, nodeCheck);
		},
		"~": function(checkSet, part){
			var doneName = "done" + (done++), checkFn = dirCheck;

			if ( typeof part === "string" && !part.match(/\W/) ) {
				var nodeCheck = part = part.toUpperCase();
				checkFn = dirNodeCheck;
			}

			checkFn("previousSibling", part, doneName, checkSet, nodeCheck);
		}
	},
	find: {
		ID: function(match, context){
			if ( context.getElementById ) {
				var m = context.getElementById(match[1]);
				return m ? [m] : [];
			}
		},
		NAME: function(match, context){
			return context.getElementsByName(match[1]);
		},
		TAG: function(match, context){
			return context.getElementsByTagName(match[1]);
		}
	},
	preFilter: {
		CLASS: function(match){
			return new RegExp( "(?:^|\\s)" + match[1] + "(?:\\s|$)" );
		},
		ID: function(match){
			return match[1];
		},
		TAG: function(match){
			return match[1].toUpperCase();
		},
		CHILD: function(match){
			if ( match[1] == "nth" ) {
				// parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
				var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
					match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
					!/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);

				// calculate the numbers (first)n+(last) including if they are negative
				match[2] = (test[1] + (test[2] || 1)) - 0;
				match[3] = test[3] - 0;
			}

			// TODO: Move to normal caching system
			match[0] = "done" + (done++);

			return match;
		},
		ATTR: function(match){
			var name = match[1];
			
			if ( Expr.attrMap[name] ) {
				match[1] = Expr.attrMap[name];
			}

			if ( match[2] === "~=" ) {
				match[4] = " " + match[4] + " ";
			}

			return match;
		},
		PSEUDO: function(match){
			if ( match[1] === "not" ) {
				match[3] = match[3].split(/\s*,\s*/);
			}
			
			return match;
		},
		POS: function(match){
			match.unshift( true );
			return match;
		}
	},
	filters: {
		enabled: function(elem){
			return elem.disabled === false && elem.type !== "hidden";
		},
		disabled: function(elem){
			return elem.disabled === true;
		},
		checked: function(elem){
			return elem.checked === true;
		},
		selected: function(elem){
			// Accessing this property makes selected-by-default
			// options in Safari work properly
			elem.parentNode.selectedIndex;
			return elem.selected === true;
		},
		parent: function(elem){
			return !!elem.firstChild;
		},
		empty: function(elem){
			return !elem.firstChild;
		},
		has: function(elem, i, match){
			return !!Sizzle( match[3], elem ).length;
		},
		header: function(elem){
			return /h\d/i.test( elem.nodeName );
		},
		text: function(elem){
			return "text" === elem.type;
		},
		radio: function(elem){
			return "radio" === elem.type;
		},
		checkbox: function(elem){
			return "checkbox" === elem.type;
		},
		file: function(elem){
			return "file" === elem.type;
		},
		password: function(elem){
			return "password" === elem.type;
		},
		submit: function(elem){
			return "submit" === elem.type;
		},
		image: function(elem){
			return "image" === elem.type;
		},
		reset: function(elem){
			return "reset" === elem.type;
		},
		button: function(elem){
			return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
		},
		input: function(elem){
			return /input|select|textarea|button/i.test(elem.nodeName);
		}
	},
	setFilters: {
		first: function(elem, i){
			return i === 0;
		},
		last: function(elem, i, match, array){
			return i === array.length - 1;
		},
		even: function(elem, i){
			return i % 2 === 0;
		},
		odd: function(elem, i){
			return i % 2 === 1;
		},
		lt: function(elem, i, match){
			return i < match[3] - 0;
		},
		gt: function(elem, i, match){
			return i > match[3] - 0;
		},
		nth: function(elem, i, match){
			return match[3] - 0 == i;
		},
		eq: function(elem, i, match){
			return match[3] - 0 == i;
		}
	},
	filter: {
		CHILD: function(elem, match){
			var type = match[1], parent = elem.parentNode;

			var doneName = match[0];
			
			if ( parent && !parent[ doneName ] ) {
				var count = 1;

				for ( var node = parent.firstChild; node; node = node.nextSibling ) {
					if ( node.nodeType == 1 ) {
						node.nodeIndex = count++;
					}
				}

				parent[ doneName ] = count - 1;
			}

			if ( type == "first" ) {
				return elem.nodeIndex == 1;
			} else if ( type == "last" ) {
				return elem.nodeIndex == parent[ doneName ];
			} else if ( type == "only" ) {
				return parent[ doneName ] == 1;
			} else if ( type == "nth" ) {
				var add = false, first = match[2], last = match[3];

				if ( first == 1 && last == 0 ) {
					return true;
				}

				if ( first == 0 ) {
					if ( elem.nodeIndex == last ) {
						add = true;
					}
				} else if ( (elem.nodeIndex - last) % first == 0 && (elem.nodeIndex - last) / first >= 0 ) {
					add = true;
				}

				return add;
			}
		},
		PSEUDO: function(elem, match, i, array){
			var name = match[1], filter = Expr.filters[ name ];

			if ( filter ) {
				return filter( elem, i, match, array )
			} else if ( name === "contains" ) {
				return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
			} else if ( name === "not" ) {
				var not = match[3];

				for ( var i = 0, l = not.length; i < l; i++ ) {
					if ( Sizzle.filter(not[i], [elem]).length > 0 ) {
						return false;
					}
				}

				return true;
			}
		},
		ID: function(elem, match){
			return elem.nodeType === 1 && elem.getAttribute("id") === match;
		},
		TAG: function(elem, match){
			return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
		},
		CLASS: function(elem, match){
			return match.test( elem.className );
		},
		ATTR: function(elem, match){
			var result = elem[ match[1] ] || elem.getAttribute( match[1] ), value = result + "", type = match[2], check = match[4];
			return result == null ?
				false :
				type === "=" ?
				value === check :
				type === "*=" ?
				value.indexOf(check) >= 0 :
				type === "~=" ?
				(" " + value + " ").indexOf(check) >= 0 :
				!match[4] ?
				result :
				type === "!=" ?
				value != check :
				type === "^=" ?
				value.indexOf(check) === 0 :
				type === "$=" ?
				value.substr(value.length - check.length) === check :
				type === "|=" ?
				value === check || value.substr(0, check.length + 1) === check + "-" :
				false;
		},
		POS: function(elem, match, i, array){
			var name = match[2], filter = Expr.setFilters[ name ];

			if ( filter ) {
				return filter( elem, i, match, array );
			}
		}
	}
};

var makeArray = function(array, results) {
	array = Array.prototype.slice.call( array );

	if ( results ) {
		results.push.apply( results, array );
		return results;
	}
	
	return array;
};

// Perform a simple check to determine if the browser is capable of
// converting a NodeList to an array using builtin methods.
try {
	Array.prototype.slice.call( document.documentElement.childNodes );

// Provide a fallback method if it does not work
} catch(e){
	makeArray = function(array, results) {
		var ret = results || [];

		if ( array instanceof Array ) {
			Array.prototype.push.apply( ret, array );
		} else {
			if ( typeof array.length === "number" ) {
				for ( var i = 0, l = array.length; i < l; i++ ) {
					ret.push( array[i] );
				}
			} else {
				for ( var i = 0; array[i]; i++ ) {
					ret.push( array[i] );
				}
			}
		}

		return ret;
	};
}

// Check to see if the browser returns elements by name when
// querying by getElementById (and provide a workaround)
(function(){
	// We're going to inject a fake input element with a specified name
	var form = document.createElement("form"),
		id = "script" + (new Date).getTime();
	form.innerHTML = "<input name='" + id + "'/>";

	// Inject it into the root element, check its status, and remove it quickly
	var root = document.documentElement;
	root.insertBefore( form, root.firstChild );

	// The workaround has to do additional checks after a getElementById
	// Which slows things down for other browsers (hence the branching)
	if ( !!document.getElementById( id ) ) {
		Expr.find.ID = function(match, context){
			if ( context.getElementById ) {
				var m = context.getElementById(match[1]);
				return m ? m.id === match[1] || m.getAttributeNode && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
			}
		};

		Expr.filter.ID = function(elem, match){
			var node = elem.getAttributeNode && elem.getAttributeNode("id");
			return elem.nodeType === 1 && node && node.nodeValue === match;
		};
	}

	root.removeChild( form );
})();

// Check to see if the browser returns only elements
// when doing getElementsByTagName("*")
(function(){
	// Create a fake element
	var div = document.createElement("div");
	div.appendChild( document.createComment("") );

	// Make sure no comments are found
	if ( div.getElementsByTagName("*").length > 0 ) {
		Expr.find.TAG = function(match, context){
			var results = context.getElementsByTagName(match[1]);

			// Filter out possible comments
			if ( match[1] === "*" ) {
				var tmp = [];

				for ( var i = 0; results[i]; i++ ) {
					if ( results[i].nodeType === 1 ) {
						tmp.push( results[i] );
					}
				}

				results = tmp;
			}

			return results;
		};
	}
})();

if ( document.querySelectorAll ) (function(){
	var oldSizzle = Sizzle;
	
	Sizzle = function(query, context, extra){
		context = context || document;

		if ( context.nodeType === 9 ) {
			try {
				return makeArray( context.querySelectorAll(query) );
			} catch(e){}
		}
		
		return oldSizzle(query, context, extra);
	};

	Sizzle.find = oldSizzle.find;
	Sizzle.filter = oldSizzle.filter;
	Sizzle.selectors = oldSizzle.selectors;
})();

if ( document.documentElement.getElementsByClassName ) {
	Expr.order.splice(1, 0, "CLASS");
	Expr.find.CLASS = function(match, context) {
		return context.getElementsByClassName(match[1]);
	};
}

function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck ) {
	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
		var elem = checkSet[i];
		if ( elem ) {
			elem = elem[dir]
			var match = false;

			while ( elem && elem.nodeType ) {
				var done = elem[doneName];
				if ( done ) {
					match = checkSet[ done ];
					break;
				}

				if ( elem.nodeType === 1 )
					elem[doneName] = i;

				if ( elem.nodeName === cur ) {
					match = elem;
					break;
				}

				elem = elem[dir];
			}

			checkSet[i] = match;
		}
	}
}

function dirCheck( dir, cur, doneName, checkSet, nodeCheck ) {
	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
		var elem = checkSet[i];
		if ( elem ) {
			elem = elem[dir]
			var match = false;

			while ( elem && elem.nodeType ) {
				if ( elem[doneName] ) {
					match = checkSet[ elem[doneName] ];
					break;
				}

				if ( elem.nodeType === 1 ) {
					elem[doneName] = i;

					if ( typeof cur !== "string" ) {
						if ( elem === cur ) {
							match = true;
							break;
						}

					} else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
						match = elem;
						break;
					}
				}

				elem = elem[dir];
			}

			checkSet[i] = match;
		}
	}
}

var contains = document.compareDocumentPosition ?  function(a, b){
	return a.compareDocumentPosition(b) & 16;
} : function(a, b){
	return a !== b && a.contains(b);
};

// EXPOSE
jQuery.find = Sizzle;
jQuery.filter = Sizzle.filter;
jQuery.expr = Sizzle.selectors;
jQuery.expr[":"] = jQuery.expr.filters;

Sizzle.selectors.filters.hidden = function(elem){
	return "hidden" === elem.type ||
		jQuery.css(elem, "display") === "none" ||
		jQuery.css(elem, "visibility") === "hidden";
};

Sizzle.selectors.filters.visible = function(elem){
	return "hidden" !== elem.type &&
		jQuery.css(elem, "display") !== "none" &&
		jQuery.css(elem, "visibility") !== "hidden";
};

jQuery.multiFilter = function( expr, elems, not ) {
	if ( not ) {
		return jQuery.multiFilter( ":not(" + expr + ")", elems );
	}

	var exprs = expr.split(/\s*,\s*/), cur = [];

	for ( var i = 0; i < exprs.length; i++ ) {
		cur = jQuery.merge( cur, jQuery.filter( exprs[i], elems ) );
	}

	return cur;
};

jQuery.dir = function( elem, dir ){
	var matched = [], cur = elem[dir];
	while ( cur && cur != document ) {
		if ( cur.nodeType == 1 )
			matched.push( cur );
		cur = cur[dir];
	}
	return matched;
};

jQuery.nth = function(cur, result, dir, elem){
	result = result || 1;
	var num = 0;

	for ( ; cur; cur = cur[dir] )
		if ( cur.nodeType == 1 && ++num == result )
			break;

	return cur;
};

jQuery.sibling = function(n, elem){
	var r = [];

	for ( ; n; n = n.nextSibling ) {
		if ( n.nodeType == 1 && n != elem )
			r.push( n );
	}

	return r;
};

return;

window.Sizzle = Sizzle;

})();