File: /var/www/zaklada/html/node_modules/nwmatcher/src/nwmatcher.js
/*
* Copyright (C) 2007-2018 Diego Perini
* All rights reserved.
*
* nwmatcher.js - A fast CSS selector engine and matcher
*
* Author: Diego Perini <diego.perini at gmail com>
* Version: 1.4.4
* Created: 20070722
* Release: 20180305
*
* License:
* http://javascript.nwbox.com/NWMatcher/MIT-LICENSE
* Download:
* http://javascript.nwbox.com/NWMatcher/nwmatcher.js
*/
(function(global, factory) {
if (typeof module == 'object' && typeof exports == 'object') {
module.exports = factory;
} else if (typeof define === 'function' && define["amd"]) {
define(factory);
} else {
global.NW || (global.NW = { });
global.NW.Dom = factory(global);
}
})(this, function(global) {
var version = 'nwmatcher-1.4.4',
// processing context & root element
doc = global.document,
root = doc.documentElement,
// save utility methods references
slice = [ ].slice,
// persist previous parsed data
isSingleMatch,
isSingleSelect,
lastSlice,
lastContext,
lastPosition,
lastMatcher,
lastSelector,
lastPartsMatch,
lastPartsSelect,
// accepted prefix identifiers
// (id, class & pseudo-class)
prefixes = '(?:[#.:]|::)?',
// accepted attribute operators
operators = '([~*^$|!]?={1})',
// accepted whitespace characters
whitespace = '[\\x20\\t\\n\\r\\f]',
// 4 combinators F E, F>E, F+E, F~E
combinators = '\\x20|[>+~](?=[^>+~])',
// an+b format params for pseudo-classes
pseudoparms = '(?:[-+]?\\d*n)?[-+]?\\d*',
// skip [ ], ( ), { } brackets groups
skip_groups = '\\[.*\\]|\\(.*\\)|\\{.*\\}',
// any escaped char
any_esc_chr = '\\\\.',
// alpha chars & low dash
alphalodash = '[_a-zA-Z]',
// non-ascii chars (utf-8)
non_asc_chr = '[^\\x00-\\x9f]',
// escape sequences in strings
escaped_chr = '\\\\[^\\n\\r\\f0-9a-fA-F]',
// Unicode chars including trailing whitespace
unicode_chr = '\\\\[0-9a-fA-F]{1,6}(?:\\r\\n|' + whitespace + ')?',
// CSS quoted string values
quotedvalue = '"[^"\\\\]*(?:\\\\.[^"\\\\]*)*"' + "|'[^'\\\\]*(?:\\\\.[^'\\\\]*)*'",
// regular expression used to skip single/nested brackets groups (round, square, curly)
// used to split comma groups excluding commas inside quotes '' "" or brackets () [] {}
reSplitGroup = /([^,\\()[\]]+|\[[^[\]]*\]|\[.*\]|\([^()]+\)|\(.*\)|\{[^{}]+\}|\{.*\}|\\.)+/g,
// regular expression to trim extra leading/trailing whitespace in selector strings
// whitespace is any combination of these 5 character [\x20\t\n\r\f]
// http://www.w3.org/TR/css3-selectors/#selector-syntax
reTrimSpaces = RegExp('[\\n\\r\\f]|^' + whitespace + '+|' + whitespace + '+$', 'g'),
// regular expression used in convertEscapes and unescapeIdentifier
reEscapedChars = /\\([0-9a-fA-F]{1,6}[\x20\t\n\r\f]?|.)|([\x22\x27])/g,
// for in excess whitespace removal
reWhiteSpace = /[\x20\t\n\r\f]+/g,
standardValidator, extendedValidator, reValidator,
attrcheck, attributes, attrmatcher, pseudoclass,
reOptimizeSelector, reSimpleNot, reSplitToken,
Optimize, reClass, reSimpleSelector,
// http://www.w3.org/TR/css3-syntax/#characters
// unicode/ISO 10646 characters \xA0 and higher
// NOTE: Safari 2.0.x crashes with escaped (\\)
// Unicode ranges in regular expressions so we
// use a negated character range class instead
// now assigned at runtime from config options
identifier,
// placeholder for extensions
extensions = '.+',
// precompiled Regular Expressions
Patterns = {
// structural pseudo-classes and child selectors
spseudos: /^\:(root|empty|(?:first|last|only)(?:-child|-of-type)|nth(?:-last)?(?:-child|-of-type)\(\s?(even|odd|(?:[-+]{0,1}\d*n\s?)?[-+]{0,1}\s?\d*)\s?\))?(.*)/i,
// uistates + dynamic + negation pseudo-classes
dpseudos: /^\:(link|visited|target|active|focus|hover|checked|disabled|enabled|selected|lang\(([-\w]{2,})\)|(?:matches|not)\(\s?(:nth(?:-last)?(?:-child|-of-type)\(\s?(?:even|odd|(?:[-+]{0,1}\d*n\s?)?[-+]{0,1}\s?\d*)\s?\)|[^()]*)\s?\))?(.*)/i,
// pseudo-elements selectors
epseudos: /^((?:[:]{1,2}(?:after|before|first-letter|first-line))|(?:[:]{2,2}(?:selection|backdrop|placeholder)))?(.*)/i,
// E > F
children: RegExp('^' + whitespace + '?\\>' + whitespace + '?(.*)'),
// E + F
adjacent: RegExp('^' + whitespace + '?\\+' + whitespace + '?(.*)'),
// E ~ F
relative: RegExp('^' + whitespace + '?\\~' + whitespace + '?(.*)'),
// E F
ancestor: RegExp('^' + whitespace + '+(.*)'),
// all
universal: RegExp('^\\*(.*)')
},
Tokens = {
prefixes: prefixes,
identifier: identifier,
attributes: attributes
},
/*----------------------------- FEATURE TESTING ----------------------------*/
// detect native methods
isNative = (function() {
var re = / \w+\(/,
isnative = String(({ }).toString).replace(re, ' (');
return function(method) {
return method && typeof method != 'string' &&
isnative == String(method).replace(re, ' (');
};
})(),
// NATIVE_XXXXX true if method exist and is callable
// detect if DOM methods are native in browsers
NATIVE_FOCUS = isNative(doc.hasFocus),
NATIVE_QSAPI = isNative(doc.querySelector),
NATIVE_GEBID = isNative(doc.getElementById),
NATIVE_GEBTN = isNative(root.getElementsByTagName),
NATIVE_GEBCN = isNative(root.getElementsByClassName),
// detect native getAttribute/hasAttribute methods,
// frameworks extend these to elements, but it seems
// this does not work for XML namespaced attributes,
// used to check both getAttribute/hasAttribute in IE
NATIVE_GET_ATTRIBUTE = isNative(root.getAttribute),
NATIVE_HAS_ATTRIBUTE = isNative(root.hasAttribute),
// check if slice() can convert nodelist to array
// see http://yura.thinkweb2.com/cft/
NATIVE_SLICE_PROTO =
(function() {
var isBuggy = false;
try {
isBuggy = !!slice.call(doc.childNodes, 0)[0];
} catch(e) { }
return isBuggy;
})(),
// supports the new traversal API
NATIVE_TRAVERSAL_API =
'nextElementSibling' in root && 'previousElementSibling' in root,
// BUGGY_XXXXX true if method is feature tested and has known bugs
// detect buggy gEBID
BUGGY_GEBID = NATIVE_GEBID ?
(function() {
var isBuggy = true, x = 'x' + String(+new Date),
a = doc.createElementNS ? 'a' : '<a name="' + x + '">';
(a = doc.createElement(a)).name = x;
root.insertBefore(a, root.firstChild);
isBuggy = !!doc.getElementById(x);
root.removeChild(a);
return isBuggy;
})() :
true,
// detect IE gEBTN comment nodes bug
BUGGY_GEBTN = NATIVE_GEBTN ?
(function() {
var div = doc.createElement('div');
div.appendChild(doc.createComment(''));
return !!div.getElementsByTagName('*')[0];
})() :
true,
// detect Opera gEBCN second class and/or UTF8 bugs as well as Safari 3.2
// caching class name results and not detecting when changed,
// tests are based on the jQuery selector test suite
BUGGY_GEBCN = NATIVE_GEBCN ?
(function() {
var isBuggy, div = doc.createElement('div'), test = '\u53f0\u5317';
// Opera tests
div.appendChild(doc.createElement('span')).
setAttribute('class', test + 'abc ' + test);
div.appendChild(doc.createElement('span')).
setAttribute('class', 'x');
isBuggy = !div.getElementsByClassName(test)[0];
// Safari test
div.lastChild.className = test;
return isBuggy || div.getElementsByClassName(test).length != 2;
})() :
true,
// detect IE bug with dynamic attributes
BUGGY_GET_ATTRIBUTE = NATIVE_GET_ATTRIBUTE ?
(function() {
var input = doc.createElement('input');
input.setAttribute('value', 5);
return input.defaultValue != 5;
})() :
true,
// detect IE bug with non-standard boolean attributes
BUGGY_HAS_ATTRIBUTE = NATIVE_HAS_ATTRIBUTE ?
(function() {
var option = doc.createElement('option');
option.setAttribute('selected', 'selected');
return !option.hasAttribute('selected');
})() :
true,
// detect Safari bug with selected option elements
BUGGY_SELECTED =
(function() {
var select = doc.createElement('select');
select.appendChild(doc.createElement('option'));
return !select.firstChild.selected;
})(),
// initialized with the loading context
// and reset for each different context
BUGGY_QUIRKS_GEBCN,
BUGGY_QUIRKS_QSAPI,
QUIRKS_MODE,
XML_DOCUMENT,
// detect Opera browser
OPERA = typeof global.opera != 'undefined' &&
(/opera/i).test(({ }).toString.call(global.opera)),
// skip simple selector optimizations for Opera >= 11
OPERA_QSAPI = OPERA && parseFloat(global.opera.version()) >= 11,
// check Selector API implementations
RE_BUGGY_QSAPI = NATIVE_QSAPI ?
(function() {
var pattern = [ ], context, element,
expect = function(selector, element, n) {
var result = false;
context.appendChild(element);
try { result = context.querySelectorAll(selector).length == n; } catch(e) { }
while (context.firstChild) { context.removeChild(context.firstChild); }
return result;
};
// certain bugs can only be detected in standard documents
// to avoid writing a live loading document create a fake one
if (doc.implementation && doc.implementation.createDocument) {
// use a shadow document body as context
context = doc.implementation.createDocument('', '', null).
appendChild(doc.createElement('html')).
appendChild(doc.createElement('head')).parentNode.
appendChild(doc.createElement('body'));
} else {
// use an unattached div node as context
context = doc.createElement('div');
}
// fix for Safari 8.x and other engines that
// fail querying filtered sibling combinators
element = doc.createElement('div');
element.innerHTML = '<p id="a"></p><br>';
expect('p#a+*', element, 0) &&
pattern.push('\\w+#\\w+.*[+~]');
// ^= $= *= operators bugs with empty values (Opera 10 / IE8)
element = doc.createElement('p');
element.setAttribute('class', '');
expect('[class^=""]', element, 1) &&
pattern.push('[*^$]=[\\x20\\t\\n\\r\\f]*(?:""|' + "'')");
// :checked bug with option elements (Firefox 3.6.x)
// it wrongly includes 'selected' options elements
// HTML5 rules says selected options also match
element = doc.createElement('option');
element.setAttribute('selected', 'selected');
expect(':checked', element, 0) &&
pattern.push(':checked');
// :enabled :disabled bugs with hidden fields (Firefox 3.5)
// http://www.w3.org/TR/html5/links.html#selector-enabled
// http://www.w3.org/TR/css3-selectors/#enableddisabled
// not supported by IE8 Query Selector
element = doc.createElement('input');
element.setAttribute('type', 'hidden');
expect(':enabled', element, 0) &&
pattern.push(':enabled', ':disabled');
// :link bugs with hyperlinks matching (Firefox/Safari)
element = doc.createElement('link');
element.setAttribute('href', 'x');
expect(':link', element, 1) ||
pattern.push(':link');
// avoid attribute selectors for IE QSA
if (BUGGY_HAS_ATTRIBUTE) {
// IE fails in reading:
// - original values for input/textarea
// - original boolean values for controls
pattern.push('\\[[\\x20\\t\\n\\r\\f]*(?:checked|disabled|ismap|multiple|readonly|selected|value)');
}
return pattern.length ?
RegExp(pattern.join('|')) :
{ 'test': function() { return false; } };
})() :
true,
/*----------------------------- LOOKUP OBJECTS -----------------------------*/
IE_LT_9 = typeof doc.addEventListener != 'function',
LINK_NODES = { 'a': 1, 'A': 1, 'area': 1, 'AREA': 1, 'link': 1, 'LINK': 1 },
// boolean attributes should return attribute name instead of true/false
ATTR_BOOLEAN = {
'checked': 1, 'disabled': 1, 'ismap': 1,
'multiple': 1, 'readonly': 1, 'selected': 1
},
// dynamic attributes that needs to be checked against original HTML value
ATTR_DEFAULT = {
'value': 'defaultValue',
'checked': 'defaultChecked',
'selected': 'defaultSelected'
},
// attributes referencing URI data values need special treatment in IE
ATTR_URIDATA = {
'action': 2, 'cite': 2, 'codebase': 2, 'data': 2, 'href': 2,
'longdesc': 2, 'lowsrc': 2, 'src': 2, 'usemap': 2
},
// HTML 5 draft specifications
// http://www.whatwg.org/specs/web-apps/current-work/#selectors
HTML_TABLE = {
// NOTE: class name attribute selectors must always be treated using a
// case-sensitive match, this has changed from previous specifications
'accept': 1, 'accept-charset': 1, 'align': 1, 'alink': 1, 'axis': 1,
'bgcolor': 1, 'charset': 1, 'checked': 1, 'clear': 1, 'codetype': 1, 'color': 1,
'compact': 1, 'declare': 1, 'defer': 1, 'dir': 1, 'direction': 1, 'disabled': 1,
'enctype': 1, 'face': 1, 'frame': 1, 'hreflang': 1, 'http-equiv': 1, 'lang': 1,
'language': 1, 'link': 1, 'media': 1, 'method': 1, 'multiple': 1, 'nohref': 1,
'noresize': 1, 'noshade': 1, 'nowrap': 1, 'readonly': 1, 'rel': 1, 'rev': 1,
'rules': 1, 'scope': 1, 'scrolling': 1, 'selected': 1, 'shape': 1, 'target': 1,
'text': 1, 'type': 1, 'valign': 1, 'valuetype': 1, 'vlink': 1
},
/*-------------------------- REGULAR EXPRESSIONS ---------------------------*/
// placeholder to add functionalities
Selectors = {
// as a simple example this will check
// for chars not in standard ascii table
//
// 'mySpecialSelector': {
// 'Expression': /\u0080-\uffff/,
// 'Callback': mySelectorCallback
// }
//
// 'mySelectorCallback' will be invoked
// only after passing all other standard
// checks and only if none of them worked
},
// attribute operators
Operators = {
'=': "n=='%m'",
'^=': "n.indexOf('%m')==0",
'*=': "n.indexOf('%m')>-1",
'|=': "(n+'-').indexOf('%m-')==0",
'~=': "(' '+n+' ').indexOf(' %m ')>-1",
'$=': "n.substr(n.length-'%m'.length)=='%m'"
},
/*------------------------------ UTIL METHODS ------------------------------*/
// concat elements to data
concatList =
function(data, elements) {
var i = -1, element;
if (!data.length && Array.slice)
return Array.slice(elements);
while ((element = elements[++i]))
data[data.length] = element;
return data;
},
// concat elements to data and callback
concatCall =
function(data, elements, callback) {
var i = -1, element;
while ((element = elements[++i])) {
if (false === callback(data[data.length] = element)) { break; }
}
return data;
},
// change context specific variables
switchContext =
function(from, force) {
var div, oldDoc = doc;
// save passed context
lastContext = from;
// set new context document
doc = from.ownerDocument || from;
if (force || oldDoc !== doc) {
// set document root
root = doc.documentElement;
// set host environment flags
XML_DOCUMENT = doc.createElement('DiV').nodeName == 'DiV';
// In quirks mode css class names are case insensitive.
// In standards mode they are case sensitive. See docs:
// https://developer.mozilla.org/en/Mozilla_Quirks_Mode_Behavior
// http://www.whatwg.org/specs/web-apps/current-work/#selectors
QUIRKS_MODE = !XML_DOCUMENT &&
typeof doc.compatMode == 'string' ?
doc.compatMode.indexOf('CSS') < 0 :
(function() {
var style = doc.createElement('div').style;
return style && (style.width = 1) && style.width == '1px';
})();
div = doc.createElement('div');
div.appendChild(doc.createElement('p')).setAttribute('class', 'xXx');
div.appendChild(doc.createElement('p')).setAttribute('class', 'xxx');
// GEBCN buggy in quirks mode, match count is:
// Firefox 3.0+ [xxx = 1, xXx = 1]
// Opera 10.63+ [xxx = 0, xXx = 2]
BUGGY_QUIRKS_GEBCN =
!XML_DOCUMENT && NATIVE_GEBCN && QUIRKS_MODE &&
(div.getElementsByClassName('xxx').length != 2 ||
div.getElementsByClassName('xXx').length != 2);
// QSAPI buggy in quirks mode, match count is:
// At least Chrome 4+, Firefox 3.5+, Opera 10.x+, Safari 4+ [xxx = 1, xXx = 2]
// Safari 3.2 QSA doesn't work with mixedcase in quirksmode [xxx = 1, xXx = 0]
// https://bugs.webkit.org/show_bug.cgi?id=19047
// must test the attribute selector '[class~=xxx]'
// before '.xXx' or the bug may not present itself
BUGGY_QUIRKS_QSAPI =
!XML_DOCUMENT && NATIVE_QSAPI && QUIRKS_MODE &&
(div.querySelectorAll('[class~=xxx]').length != 2 ||
div.querySelectorAll('.xXx').length != 2);
Config.CACHING && Dom.setCache(true, doc);
}
},
// convert single codepoint to UTF-16 encoding
codePointToUTF16 =
function(codePoint) {
// out of range, use replacement character
if (codePoint < 1 || codePoint > 0x10ffff ||
(codePoint > 0xd7ff && codePoint < 0xe000)) {
return '\\ufffd';
}
// javascript strings are UTF-16 encoded
if (codePoint < 0x10000) {
var lowHex = '000' + codePoint.toString(16);
return '\\u' + lowHex.substr(lowHex.length - 4);
}
// supplementary high + low surrogates
return '\\u' + (((codePoint - 0x10000) >> 0x0a) + 0xd800).toString(16) +
'\\u' + (((codePoint - 0x10000) % 0x400) + 0xdc00).toString(16);
},
// convert single codepoint to string
stringFromCodePoint =
function(codePoint) {
// out of range, use replacement character
if (codePoint < 1 || codePoint > 0x10ffff ||
(codePoint > 0xd7ff && codePoint < 0xe000)) {
return '\ufffd';
}
if (codePoint < 0x10000) {
return String.fromCharCode(codePoint);
}
return String.fromCodePoint ?
String.fromCodePoint(codePoint) :
String.fromCharCode(
((codePoint - 0x10000) >> 0x0a) + 0xd800,
((codePoint - 0x10000) % 0x400) + 0xdc00);
},
// convert escape sequence in a CSS string or identifier
// to javascript string with javascript escape sequences
convertEscapes =
function(str) {
return str.replace(reEscapedChars,
function(substring, p1, p2) {
// unescaped " or '
return p2 ? '\\' + p2 :
// javascript strings are UTF-16 encoded
(/^[0-9a-fA-F]/).test(p1) ? codePointToUTF16(parseInt(p1, 16)) :
// \' \"
(/^[\\\x22\x27]/).test(p1) ? substring :
// \g \h \. \# etc
p1;
}
);
},
// convert escape sequence in a CSS string or identifier
// to javascript string with characters representations
unescapeIdentifier =
function(str) {
return str.replace(reEscapedChars,
function(substring, p1, p2) {
// unescaped " or '
return p2 ? p2 :
// javascript strings are UTF-16 encoded
(/^[0-9a-fA-F]/).test(p1) ? stringFromCodePoint(parseInt(p1, 16)) :
// \' \"
(/^[\\\x22\x27]/).test(p1) ? substring :
// \g \h \. \# etc
p1;
}
);
},
/*------------------------------ DOM METHODS -------------------------------*/
// element by id (raw)
// @return reference or null
byIdRaw =
function(id, elements) {
var i = -1, element;
while ((element = elements[++i])) {
if (element.getAttribute('id') == id) {
break;
}
}
return element || null;
},
// element by id
// @return reference or null
_byId = !BUGGY_GEBID ?
function(id, from) {
id = (/\\/).test(id) ? unescapeIdentifier(id) : id;
return from.getElementById && from.getElementById(id) ||
byIdRaw(id, from.getElementsByTagName('*'));
} :
function(id, from) {
var element = null;
id = (/\\/).test(id) ? unescapeIdentifier(id) : id;
if (XML_DOCUMENT || from.nodeType != 9) {
return byIdRaw(id, from.getElementsByTagName('*'));
}
if ((element = from.getElementById(id)) &&
element.name == id && from.getElementsByName) {
return byIdRaw(id, from.getElementsByName(id));
}
return element;
},
// publicly exposed byId
// @return reference or null
byId =
function(id, from) {
from || (from = doc);
if (lastContext !== from) { switchContext(from); }
return _byId(id, from);
},
// elements by tag (raw)
// @return array
byTagRaw =
function(tag, from) {
var any = tag == '*', element = from, elements = [ ], next = element.firstChild;
any || (tag = tag.toUpperCase());
while ((element = next)) {
if (element.tagName > '@' && (any || element.tagName.toUpperCase() == tag)) {
elements[elements.length] = element;
}
if ((next = element.firstChild || element.nextSibling)) continue;
while (!next && (element = element.parentNode) && element !== from) {
next = element.nextSibling;
}
}
return elements;
},
// elements by tag
// @return array
_byTag = !BUGGY_GEBTN && NATIVE_SLICE_PROTO ?
function(tag, from) {
return XML_DOCUMENT || from.nodeType == 11 ? byTagRaw(tag, from) :
slice.call(from.getElementsByTagName(tag), 0);
} :
function(tag, from) {
var i = -1, j = i, data = [ ], element,
elements = XML_DOCUMENT || from.nodeType == 11 ?
byTagRaw(tag, from) : from.getElementsByTagName(tag);
if (tag == '*') {
while ((element = elements[++i])) {
if (element.nodeName > '@') {
data[++j] = element;
}
}
} else {
while ((element = elements[++i])) {
data[i] = element;
}
}
return data;
},
// publicly exposed byTag
// @return array
byTag =
function(tag, from) {
from || (from = doc);
if (lastContext !== from) { switchContext(from); }
return _byTag(tag, from);
},
// publicly exposed byName
// @return array
byName =
function(name, from) {
return select('[name="' + name.replace(/\\([^\\]{1})/g, '$1') + '"]', from);
},
// elements by class (raw)
// @return array
byClassRaw =
function(name, from) {
var i = -1, j = i, data = [ ], element, elements = _byTag('*', from), n;
name = ' ' + (QUIRKS_MODE ? name.toLowerCase() : name) + ' ';
while ((element = elements[++i])) {
n = XML_DOCUMENT ? element.getAttribute('class') : element.className;
if (n && n.length && (' ' + (QUIRKS_MODE ? n.toLowerCase() : n).
replace(reWhiteSpace, ' ') + ' ').indexOf(name) > -1) {
data[++j] = element;
}
}
return data;
},
// elements by class
// @return array
_byClass =
function(name, from) {
name = QUIRKS_MODE ? name.toLowerCase() : name;
name = (/\\/).test(name) ? unescapeIdentifier(name) : name;
return (BUGGY_GEBCN || BUGGY_QUIRKS_GEBCN || XML_DOCUMENT || !from.getElementsByClassName) ?
byClassRaw(name, from) : slice.call(from.getElementsByClassName(name));
},
// publicly exposed byClass
// @return array
byClass =
function(name, from) {
from || (from = doc);
if (lastContext !== from) { switchContext(from); }
return _byClass(name, from);
},
// check element is descendant of container
// @return boolean
contains = 'compareDocumentPosition' in root ?
function(container, element) {
return (container.compareDocumentPosition(element) & 16) == 16;
} : 'contains' in root ?
function(container, element) {
return container !== element && container.contains(element);
} :
function(container, element) {
while ((element = element.parentNode)) {
if (element === container) return true;
}
return false;
},
// attribute value
// @return string
getAttribute = !BUGGY_GET_ATTRIBUTE && !IE_LT_9 ?
function(node, attribute) {
return node.getAttribute(attribute);
} :
function(node, attribute) {
attribute = attribute.toLowerCase();
if (typeof node[attribute] == 'object') {
return node.attributes[attribute] &&
node.attributes[attribute].value;
}
return (
// 'type' can only be read by using native getAttribute
attribute == 'type' ? node.getAttribute(attribute) :
// specific URI data attributes (parameter 2 to fix IE bug)
ATTR_URIDATA[attribute] ? node.getAttribute(attribute, 2) :
// boolean attributes should return name instead of true/false
ATTR_BOOLEAN[attribute] ? node.getAttribute(attribute) ? attribute : 'false' :
(node = node.getAttributeNode(attribute)) && node.value);
},
// attribute presence
// @return boolean
hasAttribute = !BUGGY_HAS_ATTRIBUTE && !IE_LT_9 ?
function(node, attribute) {
return XML_DOCUMENT ?
!!node.getAttribute(attribute) :
node.hasAttribute(attribute);
} :
function(node, attribute) {
// read the node attribute object
var obj = node.getAttributeNode(attribute = attribute.toLowerCase());
return ATTR_DEFAULT[attribute] && attribute != 'value' ?
node[ATTR_DEFAULT[attribute]] : obj && obj.specified;
},
// check node emptyness
// @return boolean
isEmpty =
function(node) {
node = node.firstChild;
while (node) {
if (node.nodeType == 3 || node.nodeName > '@') return false;
node = node.nextSibling;
}
return true;
},
// check if element matches the :link pseudo
// @return boolean
isLink =
function(element) {
return hasAttribute(element,'href') && LINK_NODES[element.nodeName];
},
// child position by nodeType
// @return number
nthElement =
function(element, last) {
var count = 1, succ = last ? 'nextSibling' : 'previousSibling';
while ((element = element[succ])) {
if (element.nodeName > '@') ++count;
}
return count;
},
// child position by nodeName
// @return number
nthOfType =
function(element, last) {
var count = 1, succ = last ? 'nextSibling' : 'previousSibling', type = element.nodeName;
while ((element = element[succ])) {
if (element.nodeName == type) ++count;
}
return count;
},
/*------------------------------- DEBUGGING --------------------------------*/
// get/set (string/object) working modes
configure =
function(option) {
if (typeof option == 'string') { return !!Config[option]; }
if (typeof option != 'object') { return Config; }
for (var i in option) {
Config[i] = !!option[i];
if (i == 'SIMPLENOT') {
matchContexts = { };
matchResolvers = { };
selectContexts = { };
selectResolvers = { };
if (!Config[i]) { Config['USE_QSAPI'] = false; }
} else if (i == 'USE_QSAPI') {
Config[i] = !!option[i] && NATIVE_QSAPI;
}
}
setIdentifierSyntax();
reValidator = RegExp(Config.SIMPLENOT ?
standardValidator : extendedValidator);
return true;
},
// control user notifications
emit =
function(message) {
if (Config.VERBOSITY) { throw Error(message); }
if (Config.LOGERRORS && console && console.log) {
console.log(message);
}
},
Config = {
// true to enable caching of result sets, false to disable
CACHING: false,
// true to allow CSS escaped identifiers, false to disallow
ESCAPECHR: true,
// true to allow identifiers containing non-ASCII (utf-8) chars
NON_ASCII: true,
// switch syntax RE, true to use Level 3, false to use Level 2
SELECTOR3: true,
// true to allow identifiers containing Unicode (utf-16) chars
UNICODE16: true,
// by default do not add missing left/right context
// to mangled selector strings like "+div" or "ul>"
// callable Dom.shortcuts method has to be available
SHORTCUTS: false,
// true to disable complex selectors nested in
// ':not()' pseudo-classes as for specifications
SIMPLENOT: true,
// true to match lowercase tag names of SVG elements in HTML
SVG_LCASE: false,
// strict QSA match all non-unique IDs (false)
// speed & libs compat match unique ID (true)
UNIQUE_ID: true,
// true to follow HTML5 specs handling of ":checked"
// pseudo-class and similar UI states (indeterminate)
USE_HTML5: true,
// true to use browsers native Query Selector API if available
USE_QSAPI: NATIVE_QSAPI,
// true to throw exceptions, false to skip throwing exceptions
VERBOSITY: true,
// true to print console errors or warnings, false to mute them
LOGERRORS: true
},
/*---------------------------- COMPILER METHODS ----------------------------*/
// init REs and context
initialize =
function(doc) {
setIdentifierSyntax();
switchContext(doc, true);
},
// set/reset default identifier syntax
// based on user configuration options
// rebuild the validator and other REs
setIdentifierSyntax =
function() {
var syntax = '', start = Config['SELECTOR3'] ? '-{2}|' : '';
Config['NON_ASCII'] && (syntax += '|' + non_asc_chr);
Config['UNICODE16'] && (syntax += '|' + unicode_chr);
Config['ESCAPECHR'] && (syntax += '|' + escaped_chr);
syntax += (Config['UNICODE16'] || Config['ESCAPECHR']) ? '' : '|' + any_esc_chr;
identifier = '-?(?:' + start + alphalodash + syntax + ')(?:-|[0-9]|' + alphalodash + syntax + ')*';
// build attribute string
attrcheck = '(' + quotedvalue + '|' + identifier + ')';
attributes = whitespace + '*(' + identifier + '(?::' + identifier + ')?)' +
whitespace + '*(?:' + operators + whitespace + '*' + attrcheck + ')?' + whitespace + '*' + '(i)?' + whitespace + '*';
attrmatcher = attributes.replace(attrcheck, '([\\x22\\x27]*)((?:\\\\?.)*?)\\3');
// build pseudoclass string
pseudoclass = '((?:' +
// an+b parameters or quoted string
pseudoparms + '|' + quotedvalue + '|' +
// id, class, pseudo-class selector
prefixes + identifier + '|' +
// nested HTML attribute selector
'\\[' + attributes + '\\]|' +
// nested pseudo-class selector
'\\(.+\\)|' + whitespace + '*|' +
// nested pseudos/separators
',)+)';
// CSS3: syntax scanner and
// one pass validation only
// using regular expression
standardValidator =
// discard start
'(?=[\\x20\\t\\n\\r\\f]*[^>+~(){}<>])' +
// open match group
'(' +
//universal selector
'\\*' +
// id/class/tag/pseudo-class identifier
'|(?:' + prefixes + identifier + ')' +
// combinator selector
'|' + combinators +
// HTML attribute selector
'|\\[' + attributes + '\\]' +
// pseudo-classes parameters
'|\\(' + pseudoclass + '\\)' +
// dom properties selector (extension)
'|\\{' + extensions + '\\}' +
// selector group separator (comma)
'|(?:,|' + whitespace + '*)' +
// close match group
')+';
// only allow simple selectors nested in ':not()' pseudo-classes
reSimpleNot = RegExp('^(' +
'(?!:not)' +
'(' + prefixes + identifier +
'|\\([^()]*\\))+' +
'|\\[' + attributes + '\\]' +
')$');
// split last, right most, selector group token
reSplitToken = RegExp('(' +
prefixes + identifier + '|' +
'\\[' + attributes + '\\]|' +
'\\(' + pseudoclass + '\\)|' +
'\\\\.|[^\\x20\\t\\n\\r\\f>+~])+', 'g');
reOptimizeSelector = RegExp(identifier + '|^$');
reSimpleSelector = RegExp(
BUGGY_GEBTN && BUGGY_GEBCN || OPERA ?
'^#?' + identifier + '$' : BUGGY_GEBTN ?
'^[.#]?' + identifier + '$' : BUGGY_GEBCN ?
'^(?:\\*|#' + identifier + ')$' :
'^(?:\\*|[.#]?' + identifier + ')$');
// matches class selectors
reClass = RegExp('(?:\\[[\\x20\\t\\n\\r\\f]*class\\b|\\.' + identifier + ')');
Optimize = {
ID: RegExp('^\\*?#(' + identifier + ')|' + skip_groups),
TAG: RegExp('^(' + identifier + ')|' + skip_groups),
CLASS: RegExp('^\\.(' + identifier + '$)|' + skip_groups)
};
Patterns.id = RegExp('^#(' + identifier + ')(.*)');
Patterns.tagName = RegExp('^(' + identifier + ')(.*)');
Patterns.className = RegExp('^\\.(' + identifier + ')(.*)');
Patterns.attribute = RegExp('^\\[' + attrmatcher + '\\](.*)');
Tokens.identifier = identifier;
Tokens.attributes = attributes;
// validator for complex selectors in ':not()' pseudo-classes
extendedValidator = standardValidator.replace(pseudoclass, '.*');
// validator for standard selectors as default
reValidator = RegExp(standardValidator);
},
// code string reused to build compiled functions
ACCEPT_NODE = 'r[r.length]=c[k];if(f&&false===f(c[k]))break main;else continue main;',
// compile a comma separated group of selector
// @mode boolean true for select, false for match
// return a compiled function
compile =
function(selector, source, mode) {
var parts = typeof selector == 'string' ? selector.match(reSplitGroup) : selector;
// ensures that source is a string
typeof source == 'string' || (source = '');
if (parts.length == 1) {
source += compileSelector(parts[0], mode ? ACCEPT_NODE : 'f&&f(k);return true;', mode);
} else {
// for each selector in the group
var i = -1, seen = { }, token;
while ((token = parts[++i])) {
token = token.replace(reTrimSpaces, '');
// avoid repeating the same token
// in comma separated group (p, p)
if (!seen[token] && (seen[token] = true)) {
source += compileSelector(token, mode ? ACCEPT_NODE : 'f&&f(k);return true;', mode);
}
}
}
if (mode) {
// for select method
return Function('c,s,d,h,g,f',
'var N,n,x=0,k=-1,e,r=[];main:while((e=c[++k])){' + source + '}return r;');
} else {
// for match method
return Function('e,s,d,h,g,f',
'var N,n,x=0,k=e;' + source + 'return false;');
}
},
// compile a CSS3 string selector into ad-hoc javascript matching function
// @return string (to be compiled)
compileSelector =
function(selector, source, mode) {
var a, b, n, k = 0, expr, match, result, status, test, type;
while (selector) {
k++;
// *** Universal selector
// * match all (empty block, do not remove)
if ((match = selector.match(Patterns.universal))) {
// do nothing, handled in the compiler where
// BUGGY_GEBTN return comment nodes (ex: IE)
expr = '';
}
// *** ID selector
// #Foo Id case sensitive
else if ((match = selector.match(Patterns.id))) {
// document can contain conflicting elements (id/name)
// prototype selector unit need this method to recover bad HTML forms
match[1] = (/\\/).test(match[1]) ? convertEscapes(match[1]) : match[1];
source = 'if(' + (XML_DOCUMENT ?
's.getAttribute(e,"id")' :
'(e.submit?s.getAttribute(e,"id"):e.id)') +
'=="' + match[1] + '"' +
'){' + source + '}';
}
// *** Type selector
// Foo Tag (case insensitive)
else if ((match = selector.match(Patterns.tagName))) {
// both tagName and nodeName properties may be upper/lower case
// depending on their creation NAMESPACE in createElementNS()
test = Config.SVG_LCASE ? '||e.nodeName=="' + match[1].toLowerCase() + '"' : '';
source = 'if(e.nodeName' + (XML_DOCUMENT ?
'=="' + match[1] + '"' : '.toUpperCase()' +
'=="' + match[1].toUpperCase() + '"' + test) +
'){' + source + '}';
}
// *** Class selector
// .Foo Class (case sensitive)
else if ((match = selector.match(Patterns.className))) {
// W3C CSS3 specs: element whose "class" attribute has been assigned a
// list of whitespace-separated values, see section 6.4 Class selectors
// and notes at the bottom; explicitly non-normative in this specification.
match[1] = (/\\/).test(match[1]) ? convertEscapes(match[1]) : match[1];
match[1] = QUIRKS_MODE ? match[1].toLowerCase() : match[1];
source = 'if((n=' + (XML_DOCUMENT ?
's.getAttribute(e,"class")' : 'e.className') +
')&&n.length&&(" "+' + (QUIRKS_MODE ? 'n.toLowerCase()' : 'n') +
'.replace(/' + whitespace + '+/g," ")+" ").indexOf(" ' + match[1] + ' ")>-1' +
'){' + source + '}';
}
// *** Attribute selector
// [attr] [attr=value] [attr="value"] [attr='value'] and !=, *=, ~=, |=, ^=, $=
// case sensitivity is treated differently depending on the document type (see map)
else if ((match = selector.match(Patterns.attribute))) {
// xml namespaced attribute ?
expr = match[1].split(':');
expr = expr.length == 2 ? expr[1] : expr[0] + '';
if (match[2] && !Operators[match[2]]) {
emit('Unsupported operator in attribute selectors "' + selector + '"');
return '';
}
test = 'false';
// replace Operators parameter if needed
if (match[2] && match[4] && (test = Operators[match[2]])) {
match[4] = (/\\/).test(match[4]) ? convertEscapes(match[4]) : match[4];
// case treatment depends on document type
type = match[5] == 'i' || HTML_TABLE[expr.toLowerCase()];
test = test.replace(/\%m/g, type ? match[4].toLowerCase() : match[4]);
} else if (match[2] == '!=' || match[2] == '=') {
test = 'n' + match[2] + '=""';
}
source = 'if(n=s.hasAttribute(e,"' + match[1] + '")){' +
(match[2] ? 'n=s.getAttribute(e,"' + match[1] + '")' : '') +
(type && match[2] ? '.toLowerCase();' : ';') +
'if(' + (match[2] ? test : 'n') + '){' + source + '}}';
}
// *** Adjacent sibling combinator
// E + F (F adiacent sibling of E)
else if ((match = selector.match(Patterns.adjacent))) {
source = NATIVE_TRAVERSAL_API ?
'var N' + k + '=e;if((e=e.previousElementSibling)){' + source + '}e=N' + k + ';' :
'var N' + k + '=e;while((e=e.previousSibling)){if(e.nodeType==1){' + source + 'break;}}e=N' + k + ';';
}
// *** General sibling combinator
// E ~ F (F relative sibling of E)
else if ((match = selector.match(Patterns.relative))) {
source = NATIVE_TRAVERSAL_API ?
'var N' + k + '=e;while((e=e.previousElementSibling)){' + source + '}e=N' + k + ';' :
'var N' + k + '=e;while((e=e.previousSibling)){if(e.nodeType==1){' + source + '}}e=N' + k + ';';
}
// *** Child combinator
// E > F (F children of E)
else if ((match = selector.match(Patterns.children))) {
source = 'var N' + k + '=e;if((e=e.parentNode)&&e.nodeType==1){' + source + '}e=N' + k + ';';
}
// *** Descendant combinator
// E F (E ancestor of F)
else if ((match = selector.match(Patterns.ancestor))) {
source = 'var N' + k + '=e;while((e=e.parentNode)&&e.nodeType==1){' + source + '}e=N' + k + ';';
}
// *** Structural pseudo-classes
// :root, :empty,
// :first-child, :last-child, :only-child,
// :first-of-type, :last-of-type, :only-of-type,
// :nth-child(), :nth-last-child(), :nth-of-type(), :nth-last-of-type()
else if ((match = selector.match(Patterns.spseudos)) && match[1]) {
switch (match[1]) {
case 'root':
// element root of the document
if (match[3]) {
source = 'if(e===h||s.contains(h,e)){' + source + '}';
} else {
source = 'if(e===h){' + source + '}';
}
break;
case 'empty':
// element that has no children
source = 'if(s.isEmpty(e)){' + source + '}';
break;
default:
if (match[1] && match[2]) {
if (match[2] == 'n') {
source = 'if(e!==h){' + source + '}';
break;
} else if (match[2] == 'even') {
a = 2;
b = 0;
} else if (match[2] == 'odd') {
a = 2;
b = 1;
} else {
// assumes correct "an+b" format, "b" before "a" to keep "n" values
b = ((n = match[2].match(/(-?\d+)$/)) ? parseInt(n[1], 10) : 0);
a = ((n = match[2].match(/(-?\d*)n/i)) ? parseInt(n[1], 10) : 0);
if (n && n[1] == '-') a = -1;
}
// build test expression out of structural pseudo (an+b) parameters
// see here: http://www.w3.org/TR/css3-selectors/#nth-child-pseudo
test = a > 1 ?
(/last/i.test(match[1])) ? '(n-(' + b + '))%' + a + '==0' :
'n>=' + b + '&&(n-(' + b + '))%' + a + '==0' : a < -1 ?
(/last/i.test(match[1])) ? '(n-(' + b + '))%' + a + '==0' :
'n<=' + b + '&&(n-(' + b + '))%' + a + '==0' : a === 0 ?
'n==' + b : a == -1 ? 'n<=' + b : 'n>=' + b;
// 4 cases: 1 (nth) x 4 (child, of-type, last-child, last-of-type)
source =
'if(e!==h){' +
'n=s[' + (/-of-type/i.test(match[1]) ? '"nthOfType"' : '"nthElement"') + ']' +
'(e,' + (/last/i.test(match[1]) ? 'true' : 'false') + ');' +
'if(' + test + '){' + source + '}' +
'}';
} else {
// 6 cases: 3 (first, last, only) x 1 (child) x 2 (-of-type)
a = /first/i.test(match[1]) ? 'previous' : 'next';
n = /only/i.test(match[1]) ? 'previous' : 'next';
b = /first|last/i.test(match[1]);
type = /-of-type/i.test(match[1]) ? '&&n.nodeName!=e.nodeName' : '&&n.nodeName<"@"';
source = 'if(e!==h){' +
( 'n=e;while((n=n.' + a + 'Sibling)' + type + ');if(!n){' + (b ? source :
'n=e;while((n=n.' + n + 'Sibling)' + type + ');if(!n){' + source + '}') + '}' ) + '}';
}
break;
}
}
// *** negation, user action and target pseudo-classes
// *** UI element states and dynamic pseudo-classes
// CSS4 :matches
// CSS3 :not, :checked, :enabled, :disabled, :target
// CSS3 :active, :hover, :focus
// CSS3 :link, :visited
else if ((match = selector.match(Patterns.dpseudos)) && match[1]) {
switch (match[1].match(/^\w+/)[0]) {
// CSS4 matches pseudo-class
case 'matches':
expr = match[3].replace(reTrimSpaces, '');
source = 'if(s.match(e, "' + expr.replace(/\x22/g, '\\"') + '",g)){' + source +'}';
break;
// CSS3 negation pseudo-class
case 'not':
// compile nested selectors, DO NOT pass the callback parameter
// SIMPLENOT allow disabling complex selectors nested
// in ':not()' pseudo-classes, breaks some test units
expr = match[3].replace(reTrimSpaces, '');
if (Config.SIMPLENOT && !reSimpleNot.test(expr)) {
// see above, log error but continue execution
emit('Negation pseudo-class only accepts simple selectors "' + selector + '"');
return '';
} else {
if ('compatMode' in doc) {
source = 'if(!' + compile(expr, '', false) + '(e,s,d,h,g)){' + source + '}';
} else {
source = 'if(!s.match(e, "' + expr.replace(/\x22/g, '\\"') + '",g)){' + source +'}';
}
}
break;
// CSS3 UI element states
case 'checked':
// for radio buttons checkboxes (HTML4) and options (HTML5)
source = 'if((typeof e.form!=="undefined"&&(/^(?:radio|checkbox)$/i).test(e.type)&&e.checked)' +
(Config.USE_HTML5 ? '||(/^option$/i.test(e.nodeName)&&(e.selected||e.checked))' : '') +
'){' + source + '}';
break;
case 'disabled':
// does not consider hidden input fields
source = 'if(((typeof e.form!=="undefined"' +
(Config.USE_HTML5 ? '' : '&&!(/^hidden$/i).test(e.type)') +
')||s.isLink(e))&&e.disabled===true){' + source + '}';
break;
case 'enabled':
// does not consider hidden input fields
source = 'if(((typeof e.form!=="undefined"' +
(Config.USE_HTML5 ? '' : '&&!(/^hidden$/i).test(e.type)') +
')||s.isLink(e))&&e.disabled===false){' + source + '}';
break;
// CSS3 lang pseudo-class
case 'lang':
test = '';
if (match[2]) test = match[2].substr(0, 2) + '-';
source = 'do{(n=e.lang||"").toLowerCase();' +
'if((n==""&&h.lang=="' + match[2].toLowerCase() + '")||' +
'(n&&(n=="' + match[2].toLowerCase() +
'"||n.substr(0,3)=="' + test.toLowerCase() + '")))' +
'{' + source + 'break;}}while((e=e.parentNode)&&e!==g);';
break;
// CSS3 target pseudo-class
case 'target':
source = 'if(e.id==d.location.hash.slice(1)){' + source + '}';
break;
// CSS3 dynamic pseudo-classes
case 'link':
source = 'if(s.isLink(e)&&!e.visited){' + source + '}';
break;
case 'visited':
source = 'if(s.isLink(e)&&e.visited){' + source + '}';
break;
// CSS3 user action pseudo-classes IE & FF3 have native support
// these capabilities may be emulated by some event managers
case 'active':
if (XML_DOCUMENT) break;
source = 'if(e===d.activeElement){' + source + '}';
break;
case 'hover':
if (XML_DOCUMENT) break;
source = 'if(e===d.hoverElement){' + source + '}';
break;
case 'focus':
if (XML_DOCUMENT) break;
source = NATIVE_FOCUS ?
'if(e===d.activeElement&&d.hasFocus()&&(e.type||e.href||typeof e.tabIndex=="number")){' + source + '}' :
'if(e===d.activeElement&&(e.type||e.href)){' + source + '}';
break;
// CSS2 selected pseudo-classes, not part of current CSS3 drafts
// the 'selected' property is only available for option elements
case 'selected':
// fix Safari selectedIndex property bug
expr = BUGGY_SELECTED ? '||(n=e.parentNode)&&n.options[n.selectedIndex]===e' : '';
source = 'if(/^option$/i.test(e.nodeName)&&(e.selected||e.checked' + expr + ')){' + source + '}';
break;
default:
break;
}
}
else if ((match = selector.match(Patterns.epseudos)) && match[1]) {
source = 'if(!(/1|11/).test(e.nodeType)){' + source + '}';
}
else {
// this is where external extensions are
// invoked if expressions match selectors
expr = false;
status = false;
for (expr in Selectors) {
if ((match = selector.match(Selectors[expr].Expression)) && match[1]) {
result = Selectors[expr].Callback(match, source);
if ('match' in result) { match = result.match; }
source = result.source;
status = result.status;
if (status) { break; }
}
}
// if an extension fails to parse the selector
// it must return a false boolean in "status"
if (!status) {
// log error but continue execution, don't throw real exceptions
// because blocking following processes maybe is not a good idea
emit('Unknown pseudo-class selector "' + selector + '"');
return '';
}
if (!expr) {
// see above, log error but continue execution
emit('Unknown token in selector "' + selector + '"');
return '';
}
}
// error if no matches found by the pattern scan
if (!match) {
emit('Invalid syntax in selector "' + selector + '"');
return '';
}
// ensure "match" is not null or empty since
// we do not throw real DOMExceptions above
selector = match && match[match.length - 1];
}
return source;
},
/*----------------------------- QUERY METHODS ------------------------------*/
// match element with selector
// @return boolean
match =
function(element, selector, from, callback) {
var parts;
if (!(element && element.nodeType == 1)) {
emit('Invalid element argument');
return false;
} else if (typeof selector != 'string') {
emit('Invalid selector argument');
return false;
} else if (from && from.nodeType == 1 && !contains(from, element)) {
return false;
} else if (lastContext !== from) {
// reset context data when it changes
// and ensure context is set to a default
switchContext(from || (from = element.ownerDocument));
}
// normalize the selector string, remove [\n\r\f]
// whitespace, replace codepoints 0 with '\ufffd'
// trim non-relevant leading/trailing whitespaces
selector = selector.
replace(reTrimSpaces, '').
replace(/\x00|\\$/g, '\ufffd');
Config.SHORTCUTS && (selector = Dom.shortcuts(selector, element, from));
if (lastMatcher != selector) {
// process valid selector strings
if ((parts = selector.match(reValidator)) && parts[0] == selector) {
isSingleMatch = (parts = selector.match(reSplitGroup)).length < 2;
// save passed selector
lastMatcher = selector;
lastPartsMatch = parts;
} else {
emit('The string "' + selector + '", is not a valid CSS selector');
return false;
}
} else parts = lastPartsMatch;
// compile matcher resolvers if necessary
if (!matchResolvers[selector] || matchContexts[selector] !== from) {
matchResolvers[selector] = compile(isSingleMatch ? [selector] : parts, '', false);
matchContexts[selector] = from;
}
return matchResolvers[selector](element, Snapshot, doc, root, from, callback);
},
// select only the first element
// matching selector (document ordered)
first =
function(selector, from) {
return select(selector, from, function() { return false; })[0] || null;
},
// select elements matching selector
// using new Query Selector API
// or cross-browser client API
// @return array
select =
function(selector, from, callback) {
var i, changed, element, elements, parts, token, original = selector;
if (arguments.length === 0) {
emit('Not enough arguments');
return [ ];
} else if (typeof selector != 'string') {
return [ ];
} else if (from && !(/1|9|11/).test(from.nodeType)) {
emit('Invalid or illegal context element');
return [ ];
} else if (lastContext !== from) {
// reset context data when it changes
// and ensure context is set to a default
switchContext(from || (from = doc));
}
if (Config.CACHING && (elements = Dom.loadResults(original, from, doc, root))) {
return callback ? concatCall([ ], elements, callback) : elements;
}
// normalize the selector string, remove [\n\r\f]
// whitespace, replace codepoints 0 with '\ufffd'
// trim non-relevant leading/trailing whitespaces
selector = selector.
replace(reTrimSpaces, '').
replace(/\x00|\\$/g, '\ufffd');
if (!OPERA_QSAPI && reSimpleSelector.test(selector)) {
switch (selector.charAt(0)) {
case '#':
if (Config.UNIQUE_ID) {
elements = (element = _byId(selector.slice(1), from)) ? [ element ] : [ ];
}
break;
case '.':
elements = _byClass(selector.slice(1), from);
break;
default:
elements = _byTag(selector, from);
break;
}
}
else if (!XML_DOCUMENT && Config.USE_QSAPI &&
!(BUGGY_QUIRKS_QSAPI && reClass.test(selector)) &&
!RE_BUGGY_QSAPI.test(selector)) {
try {
elements = from.querySelectorAll(selector);
} catch(e) { }
}
if (elements) {
elements = callback ? concatCall([ ], elements, callback) :
NATIVE_SLICE_PROTO ? slice.call(elements) : concatList([ ], elements);
Config.CACHING && Dom.saveResults(original, from, doc, elements);
return elements;
}
Config.SHORTCUTS && (selector = Dom.shortcuts(selector, from));
if ((changed = lastSelector != selector)) {
// process valid selector strings
if ((parts = selector.match(reValidator)) && parts[0] == selector) {
isSingleSelect = (parts = selector.match(reSplitGroup)).length < 2;
// save passed selector
lastSelector = selector;
lastPartsSelect = parts;
} else {
emit('The string "' + selector + '", is not a valid CSS selector');
return [ ];
}
} else parts = lastPartsSelect;
// commas separators are treated sequentially to maintain order
if (from.nodeType == 11) {
elements = byTagRaw('*', from);
} else if (!XML_DOCUMENT && isSingleSelect) {
if (changed) {
// get right most selector token
parts = selector.match(reSplitToken);
token = parts[parts.length - 1];
// only last slice before :not rules
lastSlice = token.split(':not');
lastSlice = lastSlice[lastSlice.length - 1];
// position where token was found
lastPosition = selector.length - token.length;
}
// ID optimization RTL, to reduce number of elements to visit
if (Config.UNIQUE_ID && lastSlice && (parts = lastSlice.match(Optimize.ID)) && (token = parts[1])) {
if ((element = _byId(token, from))) {
if (match(element, selector)) {
callback && callback(element);
elements = [element];
} else elements = [ ];
}
}
// ID optimization LTR, to reduce selection context searches
else if (Config.UNIQUE_ID && (parts = selector.match(Optimize.ID)) && (token = parts[1])) {
if ((element = _byId(token, doc))) {
if ('#' + token == selector) {
callback && callback(element);
elements = [element];
} else if (/[>+~]/.test(selector)) {
from = element.parentNode;
} else {
from = element;
}
} else elements = [ ];
}
if (elements) {
Config.CACHING && Dom.saveResults(original, from, doc, elements);
return elements;
}
if (!NATIVE_GEBCN && lastSlice && (parts = lastSlice.match(Optimize.TAG)) && (token = parts[1])) {
if ((elements = _byTag(token, from)).length === 0) { return [ ]; }
selector = selector.slice(0, lastPosition) + selector.slice(lastPosition).replace(token, '*');
}
else if (lastSlice && (parts = lastSlice.match(Optimize.CLASS)) && (token = parts[1])) {
if ((elements = _byClass(token, from)).length === 0) { return [ ]; }
selector = selector.slice(0, lastPosition) + selector.slice(lastPosition).replace('.' + token,
reOptimizeSelector.test(selector.charAt(selector.indexOf(token) - 1)) ? '' : '*');
}
else if ((parts = selector.match(Optimize.CLASS)) && (token = parts[1])) {
if ((elements = _byClass(token, from)).length === 0) { return [ ]; }
for (i = 0, els = [ ]; elements.length > i; ++i) {
els = concatList(els, elements[i].getElementsByTagName('*'));
}
elements = els;
selector = selector.slice(0, lastPosition) + selector.slice(lastPosition).replace('.' + token,
reOptimizeSelector.test(selector.charAt(selector.indexOf(token) - 1)) ? '' : '*');
}
else if (NATIVE_GEBCN && lastSlice && (parts = lastSlice.match(Optimize.TAG)) && (token = parts[1])) {
if ((elements = _byTag(token, from)).length === 0) { return [ ]; }
selector = selector.slice(0, lastPosition) + selector.slice(lastPosition).replace(token, '*');
}
}
if (!elements) {
if (IE_LT_9) {
elements = /^(?:applet|object)$/i.test(from.nodeName) ? from.children : byTagRaw('*', from);
} else {
elements = from.getElementsByTagName('*');
}
}
// end of prefiltering pass
// compile selector resolver if necessary
if (!selectResolvers[selector] || selectContexts[selector] !== from) {
selectResolvers[selector] = compile(isSingleSelect ? [selector] : parts, '', true);
selectContexts[selector] = from;
}
elements = selectResolvers[selector](elements, Snapshot, doc, root, from, callback);
Config.CACHING && Dom.saveResults(original, from, doc, elements);
return elements;
},
/*-------------------------------- STORAGE ---------------------------------*/
// empty function handler
FN = function(x) { return x; },
// compiled match functions returning booleans
matchContexts = { },
matchResolvers = { },
// compiled select functions returning collections
selectContexts = { },
selectResolvers = { },
// used to pass methods to compiled functions
Snapshot = {
// element indexing methods
nthElement: nthElement,
nthOfType: nthOfType,
// element inspection methods
getAttribute: getAttribute,
hasAttribute: hasAttribute,
// element selection methods
byClass: _byClass,
byName: byName,
byTag: _byTag,
byId: _byId,
// helper/check methods
contains: contains,
isEmpty: isEmpty,
isLink: isLink,
// selection/matching
select: select,
match: match
},
/*------------------------------- PUBLIC API -------------------------------*/
// code referenced by extensions
Dom = {
ACCEPT_NODE: ACCEPT_NODE,
// retrieve element by id attr
byId: byId,
// retrieve elements by tag name
byTag: byTag,
// retrieve elements by name attr
byName: byName,
// retrieve elements by class name
byClass: byClass,
// read the value of the attribute
// as was in the original HTML code
getAttribute: getAttribute,
// check for the attribute presence
// as was in the original HTML code
hasAttribute: hasAttribute,
// element match selector, return boolean true/false
match: match,
// first element match only, return element or null
first: first,
// elements matching selector, starting from element
select: select,
// compile selector into ad-hoc javascript resolver
compile: compile,
// check that two elements are ancestor/descendant
contains: contains,
// handle selector engine configuration settings
configure: configure,
// initialize caching for each document
setCache: FN,
// load previously collected result set
loadResults: FN,
// save previously collected result set
saveResults: FN,
// handle missing context in selector strings
shortcuts: FN,
// log resolvers errors/warnings
emit: emit,
// options enabing specific engine functionality
Config: Config,
// pass methods references to compiled resolvers
Snapshot: Snapshot,
// operators descriptor
// for attribute operators extensions
Operators: Operators,
// selectors descriptor
// for pseudo-class selectors extensions
Selectors: Selectors,
// export validators REs
Tokens: Tokens,
// export version string
Version: version,
// add or overwrite user defined operators
registerOperator:
function(symbol, resolver) {
Operators[symbol] || (Operators[symbol] = resolver);
},
// add selector patterns for user defined callbacks
registerSelector:
function(name, rexp, func) {
Selectors[name] || (Selectors[name] = {
Expression: rexp,
Callback: func
});
}
};
/*---------------------------------- INIT ----------------------------------*/
// init context specific variables
initialize(doc);
return Dom;
});