3 Copyright 2012 Yahoo! Inc. All rights reserved.
4 Licensed under the BSD License.
5 http://yuilibrary.com/license/
7 YUI.add('selector-css3', function (Y, NAME) {
10 * The selector css3 module provides support for css3 selectors.
12 * @submodule selector-css3
17 an+b = get every _a_th node starting at the _b_th
18 0n+b = no repeat ("0" and "n" may both be omitted (together) , e.g. "0n+1" or "1", not "0+1"), return only the _b_th element
19 1n+b = get every element starting from b ("1" may may be omitted, e.g. "1n+0" or "n+0" or "n")
20 an+0 = get every _a_th element, "0" may be omitted
23 Y.Selector._reNth = /^(?:([\-]?\d*)(n){1}|(odd|even)$)*([\-+]?\d*)$/;
25 Y.Selector._getNth = function(node, expr, tag, reverse) {
26 Y.Selector._reNth.test(expr);
27 var a = parseInt(RegExp.$1, 10), // include every _a_ elements (zero means no repeat, just first _a_)
29 oddeven = RegExp.$3, // "odd" or "even"
30 b = parseInt(RegExp.$4, 10) || 0, // start scan from element _b_
32 siblings = Y.DOM._children(node.parentNode, tag),
36 a = 2; // always every other
39 b = (oddeven === 'odd') ? 1 : 0;
40 } else if ( isNaN(a) ) {
41 a = (n) ? 1 : 0; // start from the first or no repeat
44 if (a === 0) { // just the first
46 b = siblings.length - b + 1;
49 if (siblings[b - 1] === node) {
61 for (var i = b - 1, len = siblings.length; i < len; i += a) {
62 if ( i >= 0 && siblings[i] === node ) {
67 for (var i = siblings.length - b, len = siblings.length; i >= 0; i -= a) {
68 if ( i < len && siblings[i] === node ) {
76 Y.mix(Y.Selector.pseudos, {
77 'root': function(node) {
78 return node === node.ownerDocument.documentElement;
81 'nth-child': function(node, expr) {
82 return Y.Selector._getNth(node, expr);
85 'nth-last-child': function(node, expr) {
86 return Y.Selector._getNth(node, expr, null, true);
89 'nth-of-type': function(node, expr) {
90 return Y.Selector._getNth(node, expr, node.tagName);
93 'nth-last-of-type': function(node, expr) {
94 return Y.Selector._getNth(node, expr, node.tagName, true);
97 'last-child': function(node) {
98 var children = Y.DOM._children(node.parentNode);
99 return children[children.length - 1] === node;
102 'first-of-type': function(node) {
103 return Y.DOM._children(node.parentNode, node.tagName)[0] === node;
106 'last-of-type': function(node) {
107 var children = Y.DOM._children(node.parentNode, node.tagName);
108 return children[children.length - 1] === node;
111 'only-child': function(node) {
112 var children = Y.DOM._children(node.parentNode);
113 return children.length === 1 && children[0] === node;
116 'only-of-type': function(node) {
117 var children = Y.DOM._children(node.parentNode, node.tagName);
118 return children.length === 1 && children[0] === node;
121 'empty': function(node) {
122 return node.childNodes.length === 0;
125 'not': function(node, expr) {
126 return !Y.Selector.test(node, expr);
129 'contains': function(node, expr) {
130 var text = node.innerText || node.textContent || '';
131 return text.indexOf(expr) > -1;
134 'checked': function(node) {
135 return (node.checked === true || node.selected === true);
138 enabled: function(node) {
139 return (node.disabled !== undefined && !node.disabled);
142 disabled: function(node) {
143 return (node.disabled);
147 Y.mix(Y.Selector.operators, {
148 '^=': '^{val}', // Match starts with value
149 '$=': '{val}$', // Match ends with value
150 '*=': '{val}' // Match contains value as substring
153 Y.Selector.combinators['~'] = {
154 axis: 'previousSibling'
158 }, '3.7.2', {"requires": ["selector-native", "selector-css2"]});