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sizzle.js
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sizzle.js
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/*!
* Sizzle CSS Selector Engine
* Copyright 2012 jQuery Foundation and other contributors
* Released under the MIT license
* http://sizzlejs.com/
*/
(function( window, undefined ) {
var cachedruns,
assertGetIdNotName,
Expr,
getText,
isXML,
contains,
compile,
sortOrder,
hasDuplicate,
outermostContext,
expando = "sizzle" + -(new Date()),
strundefined = typeof undefined,
// Used in sorting
MAX_NEGATIVE = 1 << 31,
baseHasDuplicate = true,
Token = String,
document = window.document,
docElem = document.documentElement,
dirruns = 0,
done = 0,
// Array methods
arr = [],
pop = arr.pop,
push = arr.push,
slice = arr.slice,
// Use a stripped-down indexOf if we can't use a native one
indexOf = arr.indexOf || function( elem ) {
var i = 0,
len = this.length;
for ( ; i < len; i++ ) {
if ( this[i] === elem ) {
return i;
}
}
return -1;
},
// Augment a function for special use by Sizzle
markFunction = function( fn, value ) {
fn[ expando ] = value == null || value;
return fn;
},
createCache = function() {
var cache = {},
keys = [];
return markFunction(function( key, value ) {
// Only keep the most recent entries
if ( keys.push( key ) > Expr.cacheLength ) {
delete cache[ keys.shift() ];
}
// Retrieve with (key + " ") to avoid collision with native Object.prototype properties (see Issue #157)
return (cache[ key + " " ] = value);
}, cache );
},
classCache = createCache(),
tokenCache = createCache(),
compilerCache = createCache(),
// Regex
// Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
whitespace = "[\\x20\\t\\r\\n\\f]",
// http://www.w3.org/TR/css3-syntax/#characters
characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",
// Loosely modeled on CSS identifier characters
// An unquoted value should be a CSS identifier (http://www.w3.org/TR/css3-selectors/#attribute-selectors)
// Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
identifier = characterEncoding.replace( "w", "w#" ),
// Acceptable operators http://www.w3.org/TR/selectors/#attribute-selectors
operators = "([*^$|!~]?=)",
attributes = "\\[" + whitespace + "*(" + characterEncoding + ")" + whitespace +
"*(?:" + operators + whitespace + "*(?:(['\"])((?:\\\\.|[^\\\\])*?)\\3|(" + identifier + ")|)|)" + whitespace + "*\\]",
// Prefer arguments quoted,
// then not containing pseudos/brackets,
// then attribute selectors/non-parenthetical expressions,
// then anything else
// These preferences are here to reduce the number of selectors
// needing tokenize in the PSEUDO preFilter
pseudos = ":(" + characterEncoding + ")(?:\\(((['\"])((?:\\\\.|[^\\\\])*?)\\3|((?:\\\\.|[^\\\\()[\\]]|" + attributes.replace( 3, 8 ) + ")*)|.*)\\)|)",
// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
rcombinators = new RegExp( "^" + whitespace + "*([\\x20\\t\\r\\n\\f>+~])" + whitespace + "*" ),
rpseudo = new RegExp( pseudos ),
// Easily-parseable/retrievable ID or TAG or CLASS selectors
rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
rsibling = /[\x20\t\r\n\f]*[+~]/,
rheader = /h\d/i,
rinputs = /input|select|textarea|button/i,
rbackslash = /\\(?!\\)/g,
matchExpr = {
"ID": new RegExp( "^#(" + characterEncoding + ")" ),
"CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
"NAME": new RegExp( "^\\[name=['\"]?(" + characterEncoding + ")['\"]?\\]" ),
"TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
"ATTR": new RegExp( "^" + attributes ),
"PSEUDO": new RegExp( "^" + pseudos ),
"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
// For use in libraries implementing .is()
// We use this for POS matching in `select`
"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
},
// Support
// Used for testing something on an element
assert = function( fn ) {
var div = document.createElement("div");
try {
return fn( div );
} catch (e) {
return false;
} finally {
// release memory in IE
div = null;
}
},
// Check if getElementsByTagName("*") returns only elements
assertTagNameNoComments = assert(function( div ) {
div.appendChild( document.createComment("") );
return !div.getElementsByTagName("*").length;
}),
// Check if getAttribute returns normalized href attributes
assertHrefNotNormalized = assert(function( div ) {
div.innerHTML = "<a href='#'></a>";
return div.firstChild && typeof div.firstChild.getAttribute !== strundefined &&
div.firstChild.getAttribute("href") === "#";
}),
// Check if attributes should be retrieved by attribute nodes
assertAttributes = assert(function( div ) {
div.innerHTML = "<select></select>";
var type = typeof div.lastChild.getAttribute("multiple");
// IE8 returns a string for some attributes even when not present
return type !== "boolean" && type !== "string";
}),
// Check if getElementsByClassName can be trusted
assertUsableClassName = assert(function( div ) {
// Opera can't find a second classname (in 9.6)
div.innerHTML = "<div class='hidden e'></div><div class='hidden'></div>";
if ( !div.getElementsByClassName || !div.getElementsByClassName("e").length ) {
return false;
}
// Safari 3.2 caches class attributes and doesn't catch changes
div.lastChild.className = "e";
return div.getElementsByClassName("e").length === 2;
}),
// Check if getElementById returns elements by name
// Check if getElementsByName privileges form controls or returns elements by ID
assertUsableName = assert(function( div ) {
// Inject content
div.id = expando + 0;
div.innerHTML = "<a name='" + expando + "'></a><div name='" + expando + "'></div>";
docElem.insertBefore( div, docElem.firstChild );
// Test
var pass = document.getElementsByName &&
// buggy browsers will return fewer than the correct 2
document.getElementsByName( expando ).length === 2 +
// buggy browsers will return more than the correct 0
document.getElementsByName( expando + 0 ).length;
assertGetIdNotName = !document.getElementById( expando );
// Cleanup
docElem.removeChild( div );
return pass;
});
// Use a stripped-down slice if we can't use a native one
try {
slice.call( docElem.childNodes, 0 )[0].nodeType;
} catch ( e ) {
slice = function( i ) {
var elem,
results = [];
for ( ; (elem = this[i]); i++ ) {
results.push( elem );
}
return results;
};
}
function Sizzle( selector, context, results, seed ) {
results = results || [];
context = context || document;
var match, elem, xml, m,
nodeType = context.nodeType;
if ( !selector || typeof selector !== "string" ) {
return results;
}
if ( nodeType !== 1 && nodeType !== 9 ) {
return [];
}
xml = isXML( context );
if ( !xml && !seed ) {
if ( (match = rquickExpr.exec( selector )) ) {
// Speed-up: Sizzle("#ID")
if ( (m = match[1]) ) {
if ( nodeType === 9 ) {
elem = context.getElementById( m );
// Check parentNode to catch when Blackberry 4.6 returns
// nodes that are no longer in the document #6963
if ( elem && elem.parentNode ) {
// Handle the case where IE, Opera, and Webkit return items
// by name instead of ID
if ( elem.id === m ) {
results.push( elem );
return results;
}
} else {
return results;
}
} else {
// Context is not a document
if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
contains( context, elem ) && elem.id === m ) {
results.push( elem );
return results;
}
}
// Speed-up: Sizzle("TAG")
} else if ( match[2] ) {
push.apply( results, slice.call(context.getElementsByTagName( selector ), 0) );
return results;
// Speed-up: Sizzle(".CLASS")
} else if ( (m = match[3]) && assertUsableClassName && context.getElementsByClassName ) {
push.apply( results, slice.call(context.getElementsByClassName( m ), 0) );
return results;
}
}
}
// All others
return select( selector.replace( rtrim, "$1" ), context, results, seed, xml );
}
Sizzle.matches = function( expr, elements ) {
return Sizzle( expr, null, null, elements );
};
Sizzle.matchesSelector = function( elem, expr ) {
return Sizzle( expr, null, null, [ elem ] ).length > 0;
};
// Returns a function to use in pseudos for input types
function createInputPseudo( type ) {
return function( elem ) {
var name = elem.nodeName.toLowerCase();
return name === "input" && elem.type === type;
};
}
// Returns a function to use in pseudos for buttons
function createButtonPseudo( type ) {
return function( elem ) {
var name = elem.nodeName.toLowerCase();
return (name === "input" || name === "button") && elem.type === type;
};
}
// Returns a function to use in pseudos for positionals
function createPositionalPseudo( fn ) {
return markFunction(function( argument ) {
argument = +argument;
return markFunction(function( seed, matches ) {
var j,
matchIndexes = fn( [], seed.length, argument ),
i = matchIndexes.length;
// Match elements found at the specified indexes
while ( i-- ) {
if ( seed[ (j = matchIndexes[i]) ] ) {
seed[j] = !(matches[j] = seed[j]);
}
}
});
});
}
/**
* Utility function for retrieving the text value of an array of DOM nodes
* @param {Array|Element} elem
*/
getText = Sizzle.getText = function( elem ) {
var node,
ret = "",
i = 0,
nodeType = elem.nodeType;
if ( !nodeType ) {
// If no nodeType, this is expected to be an array
for ( ; (node = elem[i]); i++ ) {
// Do not traverse comment nodes
ret += getText( node );
}
} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
// Use textContent for elements
// innerText usage removed for consistency of new lines (see #11153)
if ( typeof elem.textContent === "string" ) {
return elem.textContent;
} else {
// Traverse its children
for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
ret += getText( elem );
}
}
} else if ( nodeType === 3 || nodeType === 4 ) {
return elem.nodeValue;
}
// Do not include comment or processing instruction nodes
return ret;
};
isXML = Sizzle.isXML = function( elem ) {
// documentElement is verified for cases where it doesn't yet exist
// (such as loading iframes in IE - #4833)
var documentElement = elem && (elem.ownerDocument || elem).documentElement;
return documentElement ? documentElement.nodeName !== "HTML" : false;
};
// Element contains another
contains = Sizzle.contains = docElem.contains || docElem.compareDocumentPosition ?
function( a, b ) {
var adown = a.nodeType === 9 ? a.documentElement : a,
bup = b && b.parentNode;
return a === bup || !!( bup && bup.nodeType === 1 && (
adown.contains ?
adown.contains( bup ) :
a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
));
} :
function( a, b ) {
if ( b ) {
while ( (b = b.parentNode) ) {
if ( b === a ) {
return true;
}
}
}
return false;
};
Sizzle.attr = function( elem, name ) {
var val,
xml = isXML( elem );
if ( !xml ) {
name = name.toLowerCase();
}
if ( (val = Expr.attrHandle[ name ]) ) {
return val( elem );
}
if ( xml || assertAttributes ) {
return elem.getAttribute( name );
}
return ( (val = elem.getAttributeNode( name )) || elem.getAttribute( name ) ) && elem[ name ] === true ?
name :
val && val.specified ? val.value : null;
};
Expr = Sizzle.selectors = {
// Can be adjusted by the user
cacheLength: 50,
createPseudo: markFunction,
match: matchExpr,
// IE6/7 return a modified href
attrHandle: assertHrefNotNormalized ?
{} :
{
"href": function( elem ) {
return elem.getAttribute( "href", 2 );
},
"type": function( elem ) {
return elem.getAttribute("type");
}
},
find: {
"ID": assertGetIdNotName ?
function( id, context, xml ) {
if ( typeof context.getElementById !== strundefined && !xml ) {
var m = context.getElementById( id );
// Check parentNode to catch when Blackberry 4.6 returns
// nodes that are no longer in the document #6963
return m && m.parentNode ? [m] : [];
}
} :
function( id, context, xml ) {
if ( typeof context.getElementById !== strundefined && !xml ) {
var m = context.getElementById( id );
return m ?
m.id === id || typeof m.getAttributeNode !== strundefined && m.getAttributeNode("id").value === id ?
[m] :
undefined :
[];
}
},
"TAG": assertTagNameNoComments ?
function( tag, context ) {
if ( typeof context.getElementsByTagName !== strundefined ) {
return context.getElementsByTagName( tag );
}
} :
function( tag, context ) {
var elem,
tmp = [],
i = 0,
results = context.getElementsByTagName( tag );
// Filter out possible comments
if ( tag === "*" ) {
for ( ; (elem = results[i]); i++ ) {
if ( elem.nodeType === 1 ) {
tmp.push( elem );
}
}
return tmp;
}
return results;
},
"NAME": assertUsableName && function( tag, context ) {
if ( typeof context.getElementsByName !== strundefined ) {
return context.getElementsByName( name );
}
},
"CLASS": assertUsableClassName && function( className, context, xml ) {
if ( typeof context.getElementsByClassName !== strundefined && !xml ) {
return context.getElementsByClassName( className );
}
}
},
relative: {
">": { dir: "parentNode", first: true },
" ": { dir: "parentNode" },
"+": { dir: "previousSibling", first: true },
"~": { dir: "previousSibling" }
},
preFilter: {
"ATTR": function( match ) {
match[1] = match[1].replace( rbackslash, "" );
// Move the given value to match[3] whether quoted or unquoted
match[3] = ( match[4] || match[5] || "" ).replace( rbackslash, "" );
if ( match[2] === "~=" ) {
match[3] = " " + match[3] + " ";
}
return match.slice( 0, 4 );
},
"CHILD": function( match ) {
/* matches from matchExpr["CHILD"]
1 type (only|nth|...)
2 what (child|of-type)
3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
4 xn-component of xn+y argument ([+-]?\d*n|)
5 sign of xn-component
6 x of xn-component
7 sign of y-component
8 y of y-component
*/
match[1] = match[1].toLowerCase();
if ( match[1].slice( 0, 3 ) === "nth" ) {
// nth-* requires argument
if ( !match[3] ) {
Sizzle.error( match[0] );
}
// numeric x and y parameters for Expr.filter.CHILD
// remember that false/true cast respectively to 0/1
match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
// other types prohibit arguments
} else if ( match[3] ) {
Sizzle.error( match[0] );
}
return match;
},
"PSEUDO": function( match ) {
var excess,
unquoted = !match[5] && match[2];
if ( matchExpr["CHILD"].test( match[0] ) ) {
return null;
}
// Accept quoted arguments as-is
if ( match[4] ) {
match[2] = match[4];
// Strip excess characters from unquoted arguments
} else if ( unquoted && rpseudo.test( unquoted ) &&
// Get excess from tokenize (recursively)
(excess = tokenize( unquoted, true )) &&
// advance to the next closing parenthesis
(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
// excess is a negative index
match[0] = match[0].slice( 0, excess );
match[2] = unquoted.slice( 0, excess );
}
// Return only captures needed by the pseudo filter method (type and argument)
return match.slice( 0, 3 );
}
},
filter: {
"ID": assertGetIdNotName ?
function( id ) {
var attrId = id.replace( rbackslash, "" );
return function( elem ) {
return elem.getAttribute("id") === attrId;
};
} :
function( id ) {
var attrId = id.replace( rbackslash, "" );
return function( elem ) {
var node = typeof elem.getAttributeNode !== strundefined && elem.getAttributeNode("id");
return node && node.value === attrId;
};
},
"TAG": function( nodeName ) {
if ( nodeName === "*" ) {
return function() { return true; };
}
nodeName = nodeName.replace( rbackslash, "" ).toLowerCase();
return function( elem ) {
return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
};
},
"CLASS": function( className ) {
var pattern = classCache[ expando ][ className + " " ];
return pattern ||
(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
classCache( className, function( elem ) {
return pattern.test( elem.className || (typeof elem.getAttribute !== strundefined && elem.getAttribute("class")) || "" );
});
},
"ATTR": function( name, operator, check ) {
return function( elem ) {
var result = Sizzle.attr( elem, name );
if ( result == null ) {
return operator === "!=";
}
if ( !operator ) {
return true;
}
result += "";
return operator === "=" ? result === check :
operator === "!=" ? result !== check :
operator === "^=" ? check && result.indexOf( check ) === 0 :
operator === "*=" ? check && result.indexOf( check ) > -1 :
operator === "$=" ? check && result.substr( result.length - check.length ) === check :
operator === "~=" ? ( " " + result + " " ).indexOf( check ) > -1 :
operator === "|=" ? result === check || result.substr( 0, check.length + 1 ) === check + "-" :
false;
};
},
"CHILD": function( type, what, argument, first, last ) {
var simple = type.slice( 0, 3 ) !== "nth",
forward = type.slice( -4 ) !== "last",
ofType = what === "of-type";
return first === 1 && last === 0 ?
// Shortcut for :nth-*(n)
function( elem ) {
return !!elem.parentNode;
} :
function( elem, context, xml ) {
var cache, outerCache, node, diff, nodeIndex, start,
dir = simple !== forward ? "nextSibling" : "previousSibling",
parent = elem.parentNode,
name = ofType && elem.nodeName.toLowerCase(),
useCache = !xml && !ofType;
if ( parent ) {
// :(first|last|only)-(child|of-type)
if ( simple ) {
while ( dir ) {
node = elem;
while ( (node = node[ dir ]) ) {
if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
return false;
}
}
// Reverse direction for :only-* (if we haven't yet done so)
start = dir = type === "only" && !start && "nextSibling";
}
return true;
}
start = [ forward ? parent.firstChild : parent.lastChild ];
// non-xml :nth-child(...) stores cache data on `parent`
if ( forward && useCache ) {
// Seek `elem` from a previously-cached index
outerCache = parent[ expando ] || (parent[ expando ] = {});
cache = outerCache[ type ] || [];
nodeIndex = cache[0] === dirruns && cache[1];
diff = cache[0] === dirruns && cache[2];
node = nodeIndex && parent.childNodes[ nodeIndex ];
while ( (node = ++nodeIndex && node && node[ dir ] ||
// Fallback to seeking `elem` from the start
(diff = nodeIndex = 0) || start.pop()) ) {
// When found, cache indexes on `parent` and break
if ( node.nodeType === 1 && ++diff && node === elem ) {
outerCache[ type ] = [ dirruns, nodeIndex, diff ];
break;
}
}
// Use previously-cached element index if available
} else if ( useCache && (cache = (elem[ expando ] || (elem[ expando ] = {}))[ type ]) && cache[0] === dirruns ) {
diff = cache[1];
// xml :nth-child(...) or :nth-last-child(...) or :nth(-last)?-of-type(...)
} else {
// Use the same loop as above to seek `elem` from the start
while ( (node = ++nodeIndex && node && node[ dir ] ||
(diff = nodeIndex = 0) || start.pop()) ) {
if ( ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) && ++diff ) {
// Cache the index of each encountered element
if ( useCache ) {
(node[ expando ] || (node[ expando ] = {}))[ type ] = [ dirruns, diff ];
}
if ( node === elem ) {
break;
}
}
}
}
// Incorporate the offset, then check against cycle size
diff -= last;
return diff === first || ( diff % first === 0 && diff / first >= 0 );
}
};
},
"PSEUDO": function( pseudo, argument ) {
// pseudo-class names are case-insensitive
// http://www.w3.org/TR/selectors/#pseudo-classes
// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
// Remember that setFilters inherits from pseudos
var args,
fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
Sizzle.error( "unsupported pseudo: " + pseudo );
// The user may use createPseudo to indicate that
// arguments are needed to create the filter function
// just as Sizzle does
if ( fn[ expando ] ) {
return fn( argument );
}
// But maintain support for old signatures
if ( fn.length > 1 ) {
args = [ pseudo, pseudo, "", argument ];
return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
markFunction(function( seed, matches ) {
var idx,
matched = fn( seed, argument ),
i = matched.length;
while ( i-- ) {
idx = indexOf.call( seed, matched[i] );
seed[ idx ] = !( matches[ idx ] = matched[i] );
}
}) :
function( elem ) {
return fn( elem, 0, args );
};
}
return fn;
}
},
pseudos: {
"not": markFunction(function( selector ) {
// Trim the selector passed to compile
// to avoid treating leading and trailing
// spaces as combinators
var input = [],
results = [],
matcher = compile( selector.replace( rtrim, "$1" ) );
return matcher[ expando ] ?
markFunction(function( seed, matches, context, xml ) {
var elem,
unmatched = matcher( seed, null, xml, [] ),
i = seed.length;
// Match elements unmatched by `matcher`
while ( i-- ) {
if ( (elem = unmatched[i]) ) {
seed[i] = !(matches[i] = elem);
}
}
}) :
function( elem, context, xml ) {
input[0] = elem;
matcher( input, null, xml, results );
return !results.pop();
};
}),
"has": markFunction(function( selector ) {
return function( elem ) {
return Sizzle( selector, elem ).length > 0;
};
}),
"contains": markFunction(function( text ) {
return function( elem ) {
return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
};
}),
"enabled": function( elem ) {
return elem.disabled === false;
},
"disabled": function( elem ) {
return elem.disabled === true;
},
"checked": function( elem ) {
// In CSS3, :checked should return both checked and selected elements
// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
var nodeName = elem.nodeName.toLowerCase();
return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
},
"selected": function( elem ) {
// Accessing this property makes selected-by-default
// options in Safari work properly
if ( elem.parentNode ) {
elem.parentNode.selectedIndex;
}
return elem.selected === true;
},
"parent": function( elem ) {
return !Expr.pseudos["empty"]( elem );
},
"empty": function( elem ) {
// http://www.w3.org/TR/selectors/#empty-pseudo
// :empty is only affected by element nodes and content nodes(including text(3), cdata(4)),
// not comment, processing instructions, or others
// Thanks to Diego Perini for the nodeName shortcut
// Greater than "@" means alpha characters (specifically not starting with "#" or "?")
var node;
for ( node = elem.firstChild; node; node = node.nextSibling ) {
if ( node.nodeName > "@" || node.nodeType === 3 || node.nodeType === 4 ) {
return false;
}
}
return true;
},
"header": function( elem ) {
return rheader.test( elem.nodeName );
},
"text": function( elem ) {
var attr;
// IE6 and 7 will map elem.type to 'text' for new HTML5 types (search, etc)
// use getAttribute instead to test this case
return elem.nodeName.toLowerCase() === "input" &&
elem.type === "text" &&
( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === elem.type );
},
// Input types
"radio": createInputPseudo("radio"),
"checkbox": createInputPseudo("checkbox"),
"file": createInputPseudo("file"),
"password": createInputPseudo("password"),
"image": createInputPseudo("image"),
"submit": createButtonPseudo("submit"),
"reset": createButtonPseudo("reset"),
"button": function( elem ) {
var name = elem.nodeName.toLowerCase();
return name === "input" && elem.type === "button" || name === "button";
},
"input": function( elem ) {
return rinputs.test( elem.nodeName );
},
"focus": function( elem ) {
var doc = elem.ownerDocument;
return elem === doc.activeElement && (!doc.hasFocus || doc.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
},
"active": function( elem ) {
return elem === elem.ownerDocument.activeElement;
},
// Positional types
"first": createPositionalPseudo(function() {
return [ 0 ];
}),
"last": createPositionalPseudo(function( matchIndexes, length ) {
return [ length - 1 ];
}),
"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
return [ argument < 0 ? argument + length : argument ];
}),
"even": createPositionalPseudo(function( matchIndexes, length ) {
var i = 0;
for ( ; i < length; i += 2 ) {
matchIndexes.push( i );
}
return matchIndexes;
}),
"odd": createPositionalPseudo(function( matchIndexes, length ) {
var i = 1;
for ( ; i < length; i += 2 ) {
matchIndexes.push( i );
}
return matchIndexes;
}),
"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
var i = argument < 0 ? argument + length : argument;
for ( ; --i >= 0; ) {
matchIndexes.push( i );
}
return matchIndexes;
}),
"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
var i = argument < 0 ? argument + length : argument;
for ( ; ++i < length; ) {
matchIndexes.push( i );
}
return matchIndexes;
})
}
};
function siblingCheck( a, b ) {
var cur = a && b && a.nextSibling;
for ( ; cur; cur = cur.nextSibling ) {
if ( cur === b ) {
return -1;
}
}
return a ? 1 : -1;
}
sortOrder = docElem.compareDocumentPosition ?
function( a, b ) {
var compare;
if ( a === b ) {
hasDuplicate = true;
return 0;
}
if ( (compare = b.compareDocumentPosition && a.compareDocumentPosition && a.compareDocumentPosition( b )) ) {
if ( compare & 1 || a.parentNode && a.parentNode.nodeType === 11 ) {
if ( a === document || contains( document, a ) ) {
return -1;
}
if ( b === document || contains( document, b ) ) {
return 1;
}
return 0;
}
return compare & 4 ? -1 : 1;
}
return a.compareDocumentPosition ? -1 : 1;
} :
function( a, b ) {
var cur,
i = 0,
aup = a.parentNode,
bup = b.parentNode,
ap = [ a ],
bp = [ b ];
// The nodes are identical, we can exit early
if ( a === b ) {
hasDuplicate = true;
return 0;
// Fallback to using sourceIndex (in IE) if it's available on both nodes
} else if ( a.sourceIndex && b.sourceIndex ) {
return ( ~b.sourceIndex || MAX_NEGATIVE ) - ( contains( document, a ) && ~a.sourceIndex || MAX_NEGATIVE );
// Parentless nodes are either documents or disconnected
} else if ( !aup || !bup ) {
return a === document ? -1 :
b === document ? 1 :
aup ? -1 :
bup ? 1 :
0;
// If the nodes are siblings, we can do a quick check
} else if ( aup === bup ) {
return siblingCheck( a, b );
}
// Otherwise we need full lists of their ancestors for comparison
cur = a;
while ( (cur = cur.parentNode) ) {
ap.unshift( cur );
}
cur = b;