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Added massive speed improvements to selectors. Also added support for :nth-child(An+B) syntax.

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This commit is contained in:
John Resig 2007-06-29 19:52:38 +00:00
parent 05864eebcd
commit fd249ca808
2 changed files with 132 additions and 92 deletions
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58
src/jquery/jquery.js vendored
View file

@ -830,9 +830,9 @@ jQuery.fn = jQuery.prototype = {
* @cat DOM/Traversing
*/
find: function(t) {
return this.pushStack( jQuery.unique( jQuery.map( this, function(a){
return jQuery.find(t,a);
}) ), t );
var data = jQuery.map(this, function(a){ return jQuery.find(t,a); });
return this.pushStack( /[^+>] [^+>]/.test( t ) || t.indexOf("..") > -1 ?
jQuery.unique( data ) : data );
},
/**
@ -1553,22 +1553,18 @@ jQuery.extend({
},
attr: function(elem, name, value){
var fix = jQuery.isXMLDoc(elem) ? {} : {
"for": "htmlFor",
"class": "className",
"float": jQuery.browser.msie ? "styleFloat" : "cssFloat",
cssFloat: jQuery.browser.msie ? "styleFloat" : "cssFloat",
styleFloat: jQuery.browser.msie ? "styleFloat" : "cssFloat",
innerHTML: "innerHTML",
className: "className",
value: "value",
disabled: "disabled",
checked: "checked",
readonly: "readOnly",
selected: "selected",
maxlength: "maxLength"
};
var fix = jQuery.isXMLDoc(elem) ? {} : jQuery.props;
// Certain attributes only work when accessed via the old DOM 0 way
if ( fix[name] ) {
if ( value != undefined ) elem[fix[name]] = value;
return elem[fix[name]];
} else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName(elem, "form") && (name == "action" || name == "method") )
return elem.getAttributeNode(name).nodeValue;
// IE elem.getAttribute passes even for style
else if ( elem.tagName ) {
// IE actually uses filters for opacity ... elem is actually elem.style
if ( name == "opacity" && jQuery.browser.msie ) {
if ( value != undefined ) {
@ -1585,16 +1581,6 @@ jQuery.extend({
(parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100).toString() : "";
}
// Certain attributes only work when accessed via the old DOM 0 way
if ( fix[name] ) {
if ( value != undefined ) elem[fix[name]] = value;
return elem[fix[name]];
} else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName(elem, "form") && (name == "action" || name == "method") )
return elem.getAttributeNode(name).nodeValue;
// IE elem.getAttribute passes even for style
else if ( elem.tagName ) {
if ( value != undefined ) elem.setAttribute( name, value );
if ( jQuery.browser.msie && /href|src/.test(name) && !jQuery.isXMLDoc(elem) )
return elem.getAttribute( name, 2 );
@ -1833,6 +1819,22 @@ new function() {
// Check to see if the W3C box model is being used
jQuery.boxModel = !jQuery.browser.msie || document.compatMode == "CSS1Compat";
jQuery.props = {
"for": "htmlFor",
"class": "className",
"float": jQuery.browser.msie ? "styleFloat" : "cssFloat",
cssFloat: jQuery.browser.msie ? "styleFloat" : "cssFloat",
styleFloat: jQuery.browser.msie ? "styleFloat" : "cssFloat",
innerHTML: "innerHTML",
className: "className",
value: "value",
disabled: "disabled",
checked: "checked",
readonly: "readOnly",
selected: "selected",
maxlength: "maxLength"
};
};
/**

148
src/selector/selector.js
View file

@ -14,17 +14,16 @@ jQuery.extend({
odd: "i%2",
// Child Checks
"nth-child": "jQuery.nth(a.parentNode.firstChild,m[3],'nextSibling',a)==a",
"first-child": "jQuery.nth(a.parentNode.firstChild,1,'nextSibling')==a",
"first-child": "a.parentNode.getElementsByTagName('*')[0]==a",
"last-child": "jQuery.nth(a.parentNode.lastChild,1,'previousSibling')==a",
"only-child": "jQuery.sibling(a.parentNode.firstChild).length==1",
"only-child": "a.parentNode.getElementsByTagName('*').length==1",
// Parent Checks
parent: "a.firstChild",
empty: "!a.firstChild",
// Text Check
contains: "jQuery.fn.text.apply([a]).indexOf(m[3])>=0",
contains: "(a.textContent||a.innerText||'').indexOf(m[3])>=0",
// Visibility
visible: '"hidden"!=a.type&&jQuery.css(a,"display")!="none"&&jQuery.css(a,"visibility")!="hidden"',
@ -48,19 +47,6 @@ jQuery.extend({
button: '"button"==a.type||jQuery.nodeName(a,"button")',
input: "/input|select|textarea|button/i.test(a.nodeName)"
},
".": "jQuery.className.has(a,m[2])",
"@": {
"=": "z==m[4]",
"!=": "z!=m[4]",
"^=": "z&&!z.indexOf(m[4])",
"$=": "z&&z.substr(z.length - m[4].length,m[4].length)==m[4]",
"*=": "z&&z.indexOf(m[4])>=0",
"": "z",
_resort: function(m){
return ["", m[1], m[3], m[2], m[5]];
},
_prefix: "var z=a[m[3]];if(!z||/href|src/.test(m[3]))z=jQuery.attr(a,m[3]);"
},
"[": "jQuery.find(m[2],a).length"
},
@ -80,16 +66,6 @@ jQuery.extend({
( jQuery.chars = "(?:[\\w\u0128-\uFFFF*_-]|\\\\.)" ) + "+)")
],
token: [
/^(\/?\.\.)/, "a.parentNode",
/^(>|\/)/, "jQuery.sibling(a.firstChild)",
/^(\+)/, "jQuery.nth(a,2,'nextSibling')",
/^(~)/, function(a){
var s = jQuery.sibling(a.parentNode.firstChild);
return s.slice(jQuery.inArray(a,s) + 1);
}
],
multiFilter: function( expr, elems, not ) {
var old, cur = [];
@ -153,10 +129,12 @@ jQuery.extend({
var m = re.exec(t);
if ( m ) {
var nodeName = m[1].toUpperCase();
// Perform our own iteration and filter
for ( var i = 0; ret[i]; i++ )
for ( var c = ret[i].firstChild; c; c = c.nextSibling )
if ( c.nodeType == 1 && ( m[1] == "*" || jQuery.nodeName(c, m[1]) ) )
if ( c.nodeType == 1 && (nodeName == "*" || c.nodeName == nodeName.toUpperCase()) )
r.push( c );
ret = r;
@ -164,24 +142,36 @@ jQuery.extend({
if ( t.indexOf(" ") == 0 ) continue;
foundToken = true;
} else {
// Look for pre-defined expression tokens
for ( var i = 0, tl = jQuery.token.length; i < tl; i += 2 ) {
// Attempt to match each, individual, token in
// the specified order
var re = jQuery.token[i], fn = jQuery.token[i+1];
var m = re.exec(t);
re = /^((\/?\.\.)|([>\/+~]))\s*([a-z]*)/i;
// If the token match was found
if ( m ) {
// Map it against the token's handler
r = ret = jQuery.map( ret, jQuery.isFunction( fn ) ?
fn : new Function( "a", "return " + fn ) );
if ( (m = re.exec(t)) != null ) {
r = [];
var nodeName = m[4], mergeNum = jQuery.mergeNum++;
m = m[1];
for ( var j = 0, rl = ret.length; j < rl; j++ )
if ( m.indexOf("..") < 0 ) {
var n = m == "~" || m == "+" ? ret[j].nextSibling : ret[j].firstChild;
for ( ; n; n = n.nextSibling )
if ( n.nodeType == 1 ) {
if ( m == "~" && n.mergeNum == mergeNum ) break;
if (!nodeName || n.nodeName == nodeName.toUpperCase() ) {
if ( m == "~" ) n.mergeNum = mergeNum;
r.push( n );
}
if ( m == "+" ) break;
}
} else
r.push( ret[j].parentNode );
ret = r;
// And remove the token
t = jQuery.trim( t.replace( re, "" ) );
foundToken = true;
break;
}
}
}
@ -326,12 +316,7 @@ jQuery.extend({
// Remove what we just matched
t = t.substring( m[0].length );
// Re-organize the first match
if ( jQuery.expr[ m[1] ]._resort )
m = jQuery.expr[ m[1] ]._resort( m );
m[2] = m[2].replace(/\\/g, "");
break;
}
}
@ -348,16 +333,69 @@ jQuery.extend({
else if ( m[1] == "." )
r = jQuery.classFilter(r, m[2], not);
else if ( m[1] == "@" ) {
var tmp = [], type = m[3];
for ( var i = 0, rl = r.length; i < rl; i++ ) {
var a = r[i], z = a[ jQuery.props[m[2]] || m[2] ];
if ( z == null || /href|src/.test(m[2]) )
z = jQuery.attr(a,m[2]);
if ( (type == "" && !!z ||
type == "=" && z == m[5] ||
type == "!=" && z != m[5] ||
type == "^=" && z && !z.indexOf(m[5]) ||
type == "$=" && z.substr(z.length - m[5].length) == m[5] ||
type == "*=" && z.indexOf(m[5]) >= 0) ^ not )
tmp.push( a );
}
r = tmp;
// We can get a speed boost by handling nth-child here
} else if ( m[1] == ":" && m[2] == "nth-child" ) {
var num = jQuery.mergeNum++, tmp = [],
test = /(\d*)n\+?(\d*)/.exec(
m[3] == "even" && "2n" || m[3] == "odd" && "2n+1" ||
!/\D/.test(m[3]) && "n+" + m[3] || m[3]),
first = (test[1] || 1) - 0, last = test[2] - 0;
for ( var i = 0, rl = r.length; i < rl; i++ ) {
var node = r[i], parentNode = node.parentNode;
if ( num != parentNode.mergeNum ) {
var c = 1;
for ( var n = parentNode.firstChild; n; n = n.nextSibling )
if ( n.nodeType == 1 )
n.nodeIndex = c++;
parentNode.mergeNum = num;
}
var add = false;
if ( first == 1 ) {
if ( node.nodeIndex == last )
add = true;
} else if ( (node.nodeIndex + last) % first == 0 )
add = true;
if ( add ^ not )
tmp.push( node );
}
r = tmp;
// Otherwise, find the expression to execute
else {
} else {
var f = jQuery.expr[m[1]];
if ( typeof f != "string" )
f = jQuery.expr[m[1]][m[2]];
// Build a custom macro to enclose it
eval("f = function(a,i){" +
( jQuery.expr[ m[1] ]._prefix || "" ) +
"return " + f + "}");
eval("f = function(a,i){return " + f + "}");
// Execute it against the current filter
r = jQuery.grep( r, f, not );
@ -403,11 +441,11 @@ jQuery.extend({
nth: function(cur,result,dir,elem){
result = result || 1;
var num = 0;
for ( ; cur; cur = cur[dir] ) {
if ( cur.nodeType == 1 ) num++;
if ( num == result || result == "even" && num % 2 == 0 && num > 1 && cur == elem ||
result == "odd" && num % 2 == 1 && cur == elem ) break;
}
for ( ; cur; cur = cur[dir] )
if ( cur.nodeType == 1 && ++num == result )
break;
return cur;
},