DomQuery.js
/*
* This is code is also distributed under MIT license for use
* with jQuery and prototype JavaScript libraries.
*/
// holder
/***
* @class Ext.DomQuery
* Provides high performance selector/xpath processing by compiling queries into reusable functions.
* New pseudo classes and matchers can be plugged. It works on HTML and XML documents (if a content node is passed in).
* @singleton
*/
Ext.DomQuery = function(){
var cache = {}, simpleCache = {}, valueCache = {};
var nonSpace = /\S/;
var trimRe = /^\s+|\s+$/g;
var tplRe = /\{(\d+)\}/g;
var modeRe = /^(\s?[\/>]\s?|\s|$)/;
var tagTokenRe = /^(#)?([\w-\*]+)/;
function child(p, index){
var i = 0;
var n = p.firstChild;
while(n){
if(n.nodeType == 1){
if(++i == index){
return n;
}
}
n = n.nextSibling;
}
return null;
};
function next(n){
while((n = n.nextSibling) && n.nodeType != 1);
return n;
};
function prev(n){
while((n = n.previousSibling) && n.nodeType != 1);
return n;
};
function clean(d){
var n = d.firstChild, ni = -1;
while(n){
var nx = n.nextSibling;
if(n.nodeType == 3 && !nonSpace.test(n.nodeValue)){
d.removeChild(n);
}else{
n.nodeIndex = ++ni;
}
n = nx;
}
return this;
};
function byClassName(c, a, v, re, cn){
if(!v){
return c;
}
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
cn = ci.className;
if(cn && (' '+cn+' ').indexOf(v) != -1){
r[r.length] = ci;
}
}
return r;
};
function attrValue(n, attr){
if(!n.tagName && typeof n.length != "undefined"){
n = n[0];
}
if(!n){
return null;
}
if(attr == "for"){
return n.htmlFor;
}
if(attr == "class" || attr == "className"){
return n.className;
}
return n.getAttribute(attr) || n[attr];
};
function getNodes(ns, mode, tagName){
var result = [], cs;
if(!ns){
return result;
}
mode = mode ? mode.replace(trimRe, "") : "";
tagName = tagName || "*";
if(typeof ns.getElementsByTagName != "undefined"){
ns = [ns];
}
if(mode != "/" && mode != ">"){
for(var i = 0, ni; ni = ns[i]; i++){
cs = ni.getElementsByTagName(tagName);
for(var j = 0, ci; ci = cs[j]; j++){
result[result.length] = ci;
}
}
}else{
for(var i = 0, ni; ni = ns[i]; i++){
var cn = ni.getElementsByTagName(tagName);
for(var j = 0, cj; cj = cn[j]; j++){
if(cj.parentNode == ni){
result[result.length] = cj;
}
}
}
}
return result;
};
function concat(a, b){
if(b.slice){
return a.concat(b);
}
for(var i = 0, l = b.length; i < l; i++){
a[a.length] = b[i];
}
return a;
}
function byTag(cs, tagName){
if(cs.tagName || cs == document){
cs = [cs];
}
if(!tagName){
return cs;
}
var r = []; tagName = tagName.toLowerCase();
for(var i = 0, ci; ci = cs[i]; i++){
if(ci.nodeType == 1 && ci.tagName.toLowerCase()==tagName){
r[r.length] = ci;
}
}
return r;
};
function byId(cs, attr, id){
if(cs.tagName || cs == document){
cs = [cs];
}
if(!id){
return cs;
}
var r = [];
for(var i = 0,ci; ci = cs[i]; i++){
if(ci && ci.id == id){
r[r.length] = ci;
return r;
}
}
return r;
};
function byAttribute(cs, attr, value, op, custom){
var r = [], st = custom=="{";
var f = Ext.DomQuery.operators[op];
for(var i = 0; ci = cs[i]; i++){
var a;
if(st){
a = Ext.DomQuery.getStyle(ci, attr);
}
else if(attr == "class" || attr == "className"){
a = ci.className;
}else if(attr == "for"){
a = ci.htmlFor;
}else if(attr == "href"){
a = ci.getAttribute("href", 2);
}else{
a = ci.getAttribute(attr);
}
if((f && f(a, value)) || (!f && a)){
r[r.length] = ci;
}
}
return r;
};
function byPseudo(cs, name, value){
return Ext.DomQuery.pseudos[name](cs, value);
};
// This is for IE MSXML which does not support expandos.
// IE runs the same speed using setAttribute, however FF slows way down
// and Safari completely fails so they need to continue to use expandos.
var isIE = window.ActiveXObject ? true : false;
var key = 30803;
function nodupIEXml(cs){
var d = ++key;
cs[0].setAttribute("_nodup", d);
var r = [cs[0]];
for(var i = 1, len = cs.length; i < len; i++){
var c = cs[i];
if(!c.getAttribute("_nodup") != d){
c.setAttribute("_nodup", d);
r[r.length] = c;
}
}
for(var i = 0, len = cs.length; i < len; i++){
cs[i].removeAttribute("_nodup");
}
return r;
}
function nodup(cs){
if(!cs){
return [];
}
var len = cs.length, c, i, r = cs, cj;
if(!len || typeof cs.nodeType != "undefined" || len == 1){
return cs;
}
if(isIE && typeof cs[0].selectSingleNode != "undefined"){
return nodupIEXml(cs);
}
var d = ++key;
cs[0]._nodup = d;
for(i = 1; c = cs[i]; i++){
if(c._nodup != d){
c._nodup = d;
}else{
r = [];
for(var j = 0; j < i; j++){
r[r.length] = cs[j];
}
for(j = i+1; cj = cs[j]; j++){
if(cj._nodup != d){
cj._nodup = d;
r[r.length] = cj;
}
}
return r;
}
}
return r;
}
function quickDiffIEXml(c1, c2){
var d = ++key;
for(var i = 0, len = c1.length; i < len; i++){
c1[i].setAttribute("_qdiff", d);
}
var r = [];
for(var i = 0, len = c2.length; i < len; i++){
if(c2[i].getAttribute("_qdiff") != d){
r[r.length] = c2[i];
}
}
for(var i = 0, len = c1.length; i < len; i++){
c1[i].removeAttribute("_qdiff");
}
return r;
}
function quickDiff(c1, c2){
var len1 = c1.length;
if(!len1){
return c2;
}
if(isIE && c1[0].selectSingleNode){
return quickDiffIEXml(c1, c2);
}
var d = ++key;
for(var i = 0; i < len1; i++){
c1[i]._qdiff = d;
}
var r = [];
for(var i = 0, len = c2.length; i < len; i++){
if(c2[i]._qdiff != d){
r[r.length] = c2[i];
}
}
return r;
}
function quickId(ns, mode, root, id){
if(ns == root){
var d = root.ownerDocument || root;
return d.getElementById(id);
}
ns = getNodes(ns, mode, "*");
return byId(ns, null, id);
}
return {
getStyle : function(el, name){
return Ext.fly(el).getStyle(name);
},
/**
* Compiles a selector/xpath query into a reusable function. The returned function
* takes one parameter "root" （可选）, which is the context node from where the query should start.
* @param {String} selector The selector/xpath query
* @param {String} type （可选） Either "select" (the default) or "simple" for a simple selector match
* @return {Function}
*/
compile : function(path, type){
// strip leading slashes
while(path.substr(0, 1)=="/"){
path = path.substr(1);
}
type = type || "select";
var fn = ["var f = function(root){\n var mode; var n = root || document;\n"];
var q = path, mode, lq;
var tk = Ext.DomQuery.matchers;
var tklen = tk.length;
var mm;
while(q && lq != q){
lq = q;
var tm = q.match(tagTokenRe);
if(type == "select"){
if(tm){
if(tm[1] == "#"){
fn[fn.length] = 'n = quickId(n, mode, root, "'+tm[2]+'");';
}else{
fn[fn.length] = 'n = getNodes(n, mode, "'+tm[2]+'");';
}
q = q.replace(tm[0], "");
}else if(q.substr(0, 1) != '@'){
fn[fn.length] = 'n = getNodes(n, mode, "*");';
}
}else{
if(tm){
if(tm[1] == "#"){
fn[fn.length] = 'n = byId(n, null, "'+tm[2]+'");';
}else{
fn[fn.length] = 'n = byTag(n, "'+tm[2]+'");';
}
q = q.replace(tm[0], "");
}
}
while(!(mm = q.match(modeRe))){
var matched = false;
for(var j = 0; j < tklen; j++){
var t = tk[j];
var m = q.match(t.re);
if(m){
fn[fn.length] = t.select.replace(tplRe, function(x, i){
return m[i];
});
q = q.replace(m[0], "");
matched = true;
break;
}
}
// prevent infinite loop on bad selector
if(!matched){
throw 'Error parsing selector, parsing failed at "' + q + '"';
}
}
if(mm[1]){
fn[fn.length] = 'mode="'+mm[1]+'";';
q = q.replace(mm[1], "");
}
}
fn[fn.length] = "return nodup(n);\n}";
eval(fn.join(""));
return f;
},
/**
* Selects a group of elements.
* @param {String} selector The selector/xpath query
* @param {Node} root （可选） The start of the query (defaults to document).
* @return {Array}
*/
select : function(path, root, type){
if(!root || root == document){
root = document;
}
if(typeof root == "string"){
root = document.getElementById(root);
}
var paths = path.split(",");
var results = [];
for(var i = 0, len = paths.length; i < len; i++){
var p = paths[i].replace(trimRe, "");
if(!cache[p]){
cache[p] = Ext.DomQuery.compile(p);
if(!cache[p]){
throw p + " is not a valid selector";
}
}
var result = cache[p](root);
if(result && result != document){
results = results.concat(result);
}
}
return results;
},
/**
* Selects a single element.
* @param {String} selector The selector/xpath query
* @param {Node} root （可选） The start of the query (defaults to document).
* @return {Element}
*/
selectNode : function(path, root){
return Ext.DomQuery.select(path, root)[0];
},
/**
* Selects the value of a node, optionally replacing null with the defaultValue.
* @param {String} selector The selector/xpath query
* @param {Node} root （可选） The start of the query (defaults to document).
* @param {String} defaultValue
*/
selectValue : function(path, root, defaultValue){
path = path.replace(trimRe, "");
if(!valueCache[path]){
valueCache[path] = Ext.DomQuery.compile(path, "select");
}
var n = valueCache[path](root);
n = n[0] ? n[0] : n;
var v = (n && n.firstChild ? n.firstChild.nodeValue : null);
return (v === null ? defaultValue : v);
},
/**
* Selects the value of a node, parsing integers and floats.
* @param {String} selector The selector/xpath query
* @param {Node} root （可选） The start of the query (defaults to document).
* @param {Number} defaultValue
* @return {Number}
*/
selectNumber : function(path, root, defaultValue){
var v = Ext.DomQuery.selectValue(path, root, defaultValue || 0);
return parseFloat(v);
},
/**
* Returns true if the passed element(s) match the passed simple selector (e.g. div.some-class or span:first-child)
* @param {String/HTMLElement/Array} el An element id, element or array of elements
* @param {String} selector The simple selector to test
* @return {Boolean}
*/
is : function(el, ss){
if(typeof el == "string"){
el = document.getElementById(el);
}
var isArray = (el instanceof Array);
var result = Ext.DomQuery.filter(isArray ? el : [el], ss);
return isArray ? (result.length == el.length) : (result.length > 0);
},
/**
* Filters an array of elements to only include matches of a simple selector (e.g. div.some-class or span:first-child)
* @param {Array} el An array of elements to filter
* @param {String} selector The simple selector to test
* @param {Boolean} nonMatches If true, it returns the elements that DON'T match
* the selector instead of the ones that match
* @return {Array}
*/
filter : function(els, ss, nonMatches){
ss = ss.replace(trimRe, "");
if(!simpleCache[ss]){
simpleCache[ss] = Ext.DomQuery.compile(ss, "simple");
}
var result = simpleCache[ss](els);
return nonMatches ? quickDiff(result, els) : result;
},
/**
* Collection of matching regular expressions and code snippets.
*/
matchers : [{
re: /^\.([\w-]+)/,
select: 'n = byClassName(n, null, " {1} ");'
}, {
re: /^\:([\w-]+)(?:\(((?:[^\s>\/]*|.*?))\))?/,
select: 'n = byPseudo(n, "{1}", "{2}");'
},{
re: /^(?:([\[\{])(?:@)?([\w-]+)\s?(?:(=|.=)\s?['"]?(.*?)["']?)?[\]\}])/,
select: 'n = byAttribute(n, "{2}", "{4}", "{3}", "{1}");'
}, {
re: /^#([\w-]+)/,
select: 'n = byId(n, null, "{1}");'
},{
re: /^@([\w-]+)/,
select: 'return {firstChild:{nodeValue:attrValue(n, "{1}")}};'
}
],
/**
* Collection of operator comparison functions. The default operators are =, !=, ^=, $=, *= and %=.
* New operators can be added as long as the match the format <i>c</i>= where <i>c<i> is any character other than space, > <.
*/
operators : {
"=" : function(a, v){
return a == v;
},
"!=" : function(a, v){
return a != v;
},
"^=" : function(a, v){
return a && a.substr(0, v.length) == v;
},
"$=" : function(a, v){
return a && a.substr(a.length-v.length) == v;
},
"*=" : function(a, v){
return a && a.indexOf(v) !== -1;
},
"%=" : function(a, v){
return (a % v) == 0;
}
},
/**
* Collection of "pseudo class" processors. Each processor is passed the current nodeset (array)
* and the argument (if any) supplied in the selector.
*/
pseudos : {
"first-child" : function(c){
var r = [], n;
for(var i = 0, ci; ci = n = c[i]; i++){
while((n = n.previousSibling) && n.nodeType != 1);
if(!n){
r[r.length] = ci;
}
}
return r;
},
"last-child" : function(c){
var r = [];
for(var i = 0, ci; ci = n = c[i]; i++){
while((n = n.nextSibling) && n.nodeType != 1);
if(!n){
r[r.length] = ci;
}
}
return r;
},
"nth-child" : function(c, a){
var r = [];
if(a != "odd" && a != "even"){
for(var i = 0, ci; ci = c[i]; i++){
var m = child(ci.parentNode, a);
if(m == ci){
r[r.length] = m;
}
}
return r;
}
var p;
// first let's clean up the parent nodes
for(var i = 0, l = c.length; i < l; i++){
var cp = c[i].parentNode;
if(cp != p){
clean(cp);
p = cp;
}
}
// then lets see if we match
for(var i = 0, ci; ci = c[i]; i++){
var m = false;
if(a == "odd"){
m = ((ci.nodeIndex+1) % 2 == 1);
}else if(a == "even"){
m = ((ci.nodeIndex+1) % 2 == 0);
}
if(m){
r[r.length] = ci;
}
}
return r;
},
"only-child" : function(c){
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
if(!prev(ci) && !next(ci)){
r[r.length] = ci;
}
}
return r;
},
"empty" : function(c){
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
var cns = ci.childNodes, j = 0, cn, empty = true;
while(cn = cns[j]){
++j;
if(cn.nodeType == 1 || cn.nodeType == 3){
empty = false;
break;
}
}
if(empty){
r[r.length] = ci;
}
}
return r;
},
"contains" : function(c, v){
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
if(ci.innerHTML.indexOf(v) !== -1){
r[r.length] = ci;
}
}
return r;
},
"nodeValue" : function(c, v){
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
if(ci.firstChild && ci.firstChild.nodeValue == v){
r[r.length] = ci;
}
}
return r;
},
"checked" : function(c){
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
if(ci.checked == true){
r[r.length] = ci;
}
}
return r;
},
"not" : function(c, ss){
return Ext.DomQuery.filter(c, ss, true);
},
"odd" : function(c){
return this["nth-child"](c, "odd");
},
"even" : function(c){
return this["nth-child"](c, "even");
},
"nth" : function(c, a){
return c[a-1] || [];
},
"first" : function(c){
return c[0] || [];
},
"last" : function(c){
return c[c.length-1] || [];
},
"has" : function(c, ss){
var s = Ext.DomQuery.select;
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
if(s(ss, ci).length > 0){
r[r.length] = ci;
}
}
return r;
},
"next" : function(c, ss){
var is = Ext.DomQuery.is;
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
var n = next(ci);
if(n && is(n, ss)){
r[r.length] = ci;
}
}
return r;
},
"prev" : function(c, ss){
var is = Ext.DomQuery.is;
var r = [];
for(var i = 0, ci; ci = c[i]; i++){
var n = prev(ci);
if(n && is(n, ss)){
r[r.length] = ci;
}
}
return r;
}
}
};
}();
/**
* Selects an array of DOM nodes by CSS/XPath selector. Shorthand of {@link Ext.DomQuery#select}
* @param {String} path The selector/xpath query
* @param {Node} root （可选） The start of the query (defaults to document).
* @return {Array}
* @member Ext
* @method query
*/
Ext.query = Ext.DomQuery.select;
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