Small optimization to jQuery.curCSS (thanks Ariel Flesler)

diff --git a/src/core.js b/src/core.js
index 5690df1..6308a99 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -611,6 +611,8 @@ var expando = "jQuery" + (new Date()).getTime(), uuid = 0, windowData = {};
 
 // exclude the following css properties to add px
 var exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i;
+// cache getComputedStyle
+var getComputedStyle = document.defaultView && document.defaultView.getComputedStyle;
 
 jQuery.extend({
        noConflict: function( deep ) {
@@ -837,8 +839,9 @@ jQuery.extend({
                function color( elem ) {
                        if ( !jQuery.browser.safari )
                                return false;
-
-                       var ret = document.defaultView.getComputedStyle( elem, null );
+                       
+                       // getComputedStyle is cached
+                       var ret = getComputedStyle( elem, null );
                        return !ret || ret.getPropertyValue("color") == "";
                }
 
@@ -864,7 +867,7 @@ jQuery.extend({
                if ( !force && elem.style && elem.style[ name ] )
                        ret = elem.style[ name ];
 
-               else if ( document.defaultView && document.defaultView.getComputedStyle ) {
+               else if ( getComputedStyle ) {
 
                        // Only "float" is needed here
                        if ( name.match( /float/i ) )
@@ -872,10 +875,10 @@ jQuery.extend({
 
                        name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 
-                       var getComputedStyle = document.defaultView.getComputedStyle( elem, null );
+                       var computedStyle = getComputedStyle( elem, null );
 
-                       if ( getComputedStyle && !color( elem ) )
-                               ret = getComputedStyle.getPropertyValue( name );
+                       if ( computedStyle && !color( elem ) )
+                               ret = computedStyle.getPropertyValue( name );
 
                        // If the element isn't reporting its values properly in Safari
                        // then some display: none elements are involved
@@ -898,7 +901,7 @@ jQuery.extend({
                                // one special, otherwise get the value
                                ret = name == "display" && swap[ stack.length - 1 ] != null ?
                                        "none" :
-                                       ( getComputedStyle && getComputedStyle.getPropertyValue( name ) ) || "";
+                                       ( computedStyle && computedStyle.getPropertyValue( name ) ) || "";
 
                                // Finally, revert the display styles back
                                for ( var i = 0; i < swap.length; i++ )