Fix for a selector speed regression (calling a simple selector many times resulted...
[jquery.git] / src / jquery / jquery.js
index 07588ba..8089e4e 100644 (file)
@@ -9,9 +9,6 @@
  * $Rev$
  */
 
-// Global undefined variable
-window.undefined = window.undefined;
-
 /**
  * Create a new jQuery Object
  *
@@ -22,7 +19,7 @@ window.undefined = window.undefined;
  * @param jQuery|Element|Array<Element> c context
  * @cat Core
  */
-var jQuery = function(a,c) {
+window.jQuery = function(a,c) {
        // If the context is global, return a new object
        if ( window == this || !this.init )
                return new jQuery(a,c);
@@ -35,7 +32,7 @@ if ( typeof $ != "undefined" )
        jQuery._$ = $;
        
 // Map the jQuery namespace to the '$' one
-var $ = jQuery;
+window.$ = jQuery;
 
 /**
  * This function accepts a string containing a CSS or
@@ -301,7 +298,7 @@ jQuery.fn = jQuery.prototype = {
         */
        setArray: function( a ) {
                this.length = 0;
-               [].push.apply( this, a );
+               Array.prototype.push.apply( this, a );
                return this;
        },
 
@@ -1160,6 +1157,10 @@ jQuery.fn = jQuery.prototype = {
                        ( this.length ? this[0].innerHTML : null ) :
                        this.empty().append( val );
        },
+
+       slice: function() {
+               return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
+       },
        
        /**
         * @private
@@ -1252,17 +1253,39 @@ jQuery.fn = jQuery.prototype = {
  */
 jQuery.extend = jQuery.fn.extend = function() {
        // copy reference to target object
-       var target = arguments[0], a = 1;
+       var target = arguments[0] || {}, a = 1, al = arguments.length, deep = false;
+
+       // Handle a deep copy situation
+       if ( target.constructor == Boolean ) {
+               deep = target;
+               target = arguments[1] || {};
+       }
 
        // extend jQuery itself if only one argument is passed
-       if ( arguments.length == 1 ) {
+       if ( al == 1 ) {
                target = this;
                a = 0;
        }
+
        var prop;
-       while ( (prop = arguments[a++]) != null )
-               // Extend the base object
-               for ( var i in prop ) target[i] = prop[i];
+
+       for ( ; a < al; a++ )
+               // Only deal with non-null/undefined values
+               if ( (prop = arguments[a]) != null )
+                       // Extend the base object
+                       for ( var i in prop ) {
+                               // Prevent never-ending loop
+                               if ( target == prop[i] )
+                                       continue;
+
+                               // Recurse if we're merging object values
+                               if ( deep && typeof prop[i] == 'object' && target[i] )
+                                       jQuery.extend( target[i], prop[i] );
+
+                               // Don't bring in undefined values
+                               else if ( prop[i] != undefined )
+                                       target[i] = prop[i];
+                       }
 
        // Return the modified object
        return target;
@@ -1371,12 +1394,24 @@ jQuery.extend({
         */
        // args is for internal usage only
        each: function( obj, fn, args ) {
-               if ( obj.length == undefined )
-                       for ( var i in obj )
-                               fn.apply( obj[i], args || [i, obj[i]] );
-               else
-                       for ( var i = 0, ol = obj.length; i < ol; i++ )
-                               if ( fn.apply( obj[i], args || [i, obj[i]] ) === false ) break;
+               if ( args ) {
+                       if ( obj.length == undefined )
+                               for ( var i in obj )
+                                       fn.apply( obj[i], args );
+                       else
+                               for ( var i = 0, ol = obj.length; i < ol; i++ )
+                                       if ( fn.apply( obj[i], args ) === false ) break;
+
+               // A special, fast, case for the most common use of each
+               } else {
+                       if ( obj.length == undefined )
+                               for ( var i in obj )
+                                       fn.call( obj[i], i, obj[i] );
+                       else
+                               for ( var i = 0, ol = obj.length, val = obj[0]; 
+                                       i < ol && fn.call(val,i,val) !== false; val = obj[++i] );
+               }
+
                return obj;
        },
        
@@ -1489,7 +1524,7 @@ jQuery.extend({
                }
                
                if (prop.match(/float/i))
-                       prop = jQuery.styleFloat;
+                       prop = styleFloat;
 
                if (!force && elem.style[prop])
                        ret = elem.style[prop];
@@ -1509,7 +1544,7 @@ jQuery.extend({
                        // then some display: none elements are involved
                        else {
                                // Locate all of the parent display: none elements
-                               for ( var a = elem; color(a); a = a.parentNode )
+                               for ( var a = elem; a && color(a); a = a.parentNode )
                                        stack.unshift(a);
 
                                // Go through and make them visible, but in reverse
@@ -1566,7 +1601,7 @@ jQuery.extend({
                                        !s.indexOf("<leg") &&
                                        [1, "<fieldset>", "</fieldset>"] ||
                                        
-                                       (!s.indexOf("<thead") || !s.indexOf("<tbody") || !s.indexOf("<tfoot") || !s.indexOf("<colg")) &&
+                                       s.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
                                        [1, "<table>", "</table>"] ||
                                        
                                        !s.indexOf("<tr") &&
@@ -1577,7 +1612,11 @@ jQuery.extend({
                                        [3, "<table><tbody><tr>", "</tr></tbody></table>"] ||
                                        
                                        !s.indexOf("<col") &&
-                                       [2, "<table><colgroup>", "</colgroup></table>"] ||
+                                       [2, "<table><tbody></tbody><colgroup>", "</colgroup></table>"] ||
+
+                                       // IE can't serialize <link> and <script> tags normally
+                                       jQuery.browser.msie &&
+                                       [1, "div<div>", "</div>"] ||
                                        
                                        [0,"",""];
 
@@ -1586,7 +1625,7 @@ jQuery.extend({
                                
                                // Move to the right depth
                                while ( wrap[0]-- )
-                                       div = div.firstChild;
+                                       div = div.lastChild;
                                
                                // Remove IE's autoinserted <tbody> from table fragments
                                if ( jQuery.browser.msie ) {
@@ -1725,8 +1764,17 @@ jQuery.extend({
        merge: function(first, second) {
                // We have to loop this way because IE & Opera overwrite the length
                // expando of getElementsByTagName
-               for ( var i = 0; second[i]; i++ )
-                       first.push(second[i]);
+
+               // Also, we need to make sure that the correct elements are being returned
+               // (IE returns comment nodes in a '*' query)
+               if ( jQuery.browser.msie ) {
+                       for ( var i = 0; second[i]; i++ )
+                               if ( second[i].nodeType != 8 )
+                                       first.push(second[i]);
+               } else
+                       for ( var i = 0; second[i]; i++ )
+                               first.push(second[i]);
+
                return first;
        },
 
@@ -1889,29 +1937,31 @@ jQuery.extend({
  * @type Boolean
  * @cat JavaScript
  */
-new function() {
-       var b = navigator.userAgent.toLowerCase();
-
-       // Figure out what browser is being used
-       jQuery.browser = {
-               version: (b.match(/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/) || [])[1],
-               safari: /webkit/.test(b),
-               opera: /opera/.test(b),
-               msie: /msie/.test(b) && !/opera/.test(b),
-               mozilla: /mozilla/.test(b) && !/(compatible|webkit)/.test(b)
-       };
+var userAgent = navigator.userAgent.toLowerCase();
+
+// Figure out what browser is being used
+jQuery.browser = {
+       version: (userAgent.match(/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/) || [])[1],
+       safari: /webkit/.test(userAgent),
+       opera: /opera/.test(userAgent),
+       msie: /msie/.test(userAgent) && !/opera/.test(userAgent),
+       mozilla: /mozilla/.test(userAgent) && !/(compatible|webkit)/.test(userAgent)
+};
 
+var styleFloat = jQuery.browser.msie ? "styleFloat" : "cssFloat";
+       
+jQuery.extend({
        // Check to see if the W3C box model is being used
-       jQuery.boxModel = !jQuery.browser.msie || document.compatMode == "CSS1Compat";
-
-       jQuery.styleFloat = jQuery.browser.msie ? "styleFloat" : "cssFloat";
-
-       jQuery.props = {
+       boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
+       
+       styleFloat: jQuery.browser.msie ? "styleFloat" : "cssFloat",
+       
+       props: {
                "for": "htmlFor",
                "class": "className",
-               "float": jQuery.styleFloat,
-               cssFloat: jQuery.styleFloat,
-               styleFloat: jQuery.styleFloat,
+               "float": styleFloat,
+               cssFloat: styleFloat,
+               styleFloat: styleFloat,
                innerHTML: "innerHTML",
                className: "className",
                value: "value",
@@ -1920,9 +1970,8 @@ new function() {
                readonly: "readOnly",
                selected: "selected",
                maxlength: "maxLength"
-       };
-
-};
+       }
+});
 
 /**
  * Get a set of elements containing the unique parents of the matched
@@ -2073,7 +2122,7 @@ jQuery.each({
                var ret = jQuery.map(this,n);
                if ( a && typeof a == "string" )
                        ret = jQuery.multiFilter(a,ret);
-               return this.pushStack( ret );
+               return this.pushStack( jQuery.unique(ret) );
        };
 });