Merge branch 'master' of git://github.com/jquery/jquery into fixedbuild

[jquery.git] / src / effects.js

diff --git a/src/effects.js b/src/effects.js
index b067539..d9e9a8b 100644 (file)
--- a/src/effects.js
+++ b/src/effects.js
@@ -185,11 +185,11 @@ jQuery.fn.extend({
 
                                } else {
                                        var parts = rfxnum.exec(val),
-                                               start = e.cur() || 0;
+                                               start = e.cur();
 
                                        if ( parts ) {
                                                var end = parseFloat( parts[2] ),
-                                                       unit = parts[3] || "px";
+                                                       unit = parts[3] || ( jQuery.cssNumber[ name ] ? "" : "px" );
 
                                                // We need to compute starting value
                                                if ( unit !== "px" ) {
@@ -336,8 +336,12 @@ jQuery.fx.prototype = {
                        return this.elem[ this.prop ];
                }
 
-               var r = parseFloat( jQuery.css( this.elem, this.prop ) );
-               return r || 0;
+               var parsed,
+                       r = jQuery.css( this.elem, this.prop );
+               // Empty strings, null, undefined and "auto" are converted to 0,
+               // complex values such as "rotate(1rad)" are returned as is,
+               // simple values such as "10px" are parsed to Float.
+               return isNaN( parsed = parseFloat( r ) ) ? !r || r === "auto" ? 0 : r : parsed;
        },
 
        // Start an animation from one number to another
@@ -348,7 +352,7 @@ jQuery.fx.prototype = {
                this.startTime = jQuery.now();
                this.start = from;
                this.end = to;
-               this.unit = unit || this.unit || "px";
+               this.unit = unit || this.unit || ( jQuery.cssNumber[ this.prop ] ? "" : "px" );
                this.now = this.start;
                this.pos = this.state = 0;