Added in support for .offset(Function).

diff --git a/src/offset.js b/src/offset.js
index d12921d..7dd7134 100644 (file)
--- a/src/offset.js
+++ b/src/offset.js
@@ -7,8 +7,8 @@ if ( "getBoundingClientRect" in document.documentElement ) {
                }
 
                if ( options ) { 
-                       return this.each(function() {
-                               jQuery.offset.setOffset( this, options );
+                       return this.each(function( i ) {
+                               jQuery.offset.setOffset( this, i, options );
                        });
                }
 
@@ -33,8 +33,8 @@ if ( "getBoundingClientRect" in document.documentElement ) {
                }
 
                if ( options ) { 
-                       return this.each(function() {
-                               jQuery.offset.setOffset( this, options );
+                       return this.each(function( i ) {
+                               jQuery.offset.setOffset( this, i, options );
                        });
                }
 
@@ -137,7 +137,7 @@ jQuery.offset = {
                return { top: top, left: left };
        },
        
-       setOffset: function( elem, options ) {
+       setOffset: function( elem, i, options ) {
                // set position first, in-case top/left are set even on static elem
                if ( /static/.test( jQuery.curCSS( elem, "position" ) ) ) {
                        elem.style.position = "relative";
@@ -145,11 +145,16 @@ jQuery.offset = {
                var curElem   = jQuery( elem ),
                        curOffset = curElem.offset(),
                        curTop    = parseInt( jQuery.curCSS( elem, "top",  true ), 10 ) || 0,
-                       curLeft   = parseInt( jQuery.curCSS( elem, "left", true ), 10)  || 0,
-                       props     = {
-                               top:  (options.top  - curOffset.top)  + curTop,
-                               left: (options.left - curOffset.left) + curLeft
-                       };
+                       curLeft   = parseInt( jQuery.curCSS( elem, "left", true ), 10 ) || 0;
+
+               if ( jQuery.isFunction( options ) ) {
+                       options = options.call( elem, i, curOffset );
+               }
+
+               var props = {
+                       top:  (options.top  - curOffset.top)  + curTop,
+                       left: (options.left - curOffset.left) + curLeft
+               };
                
                if ( "using" in options ) {
                        options.using.call( elem, props );

diff --git a/test/unit/offset.js b/test/unit/offset.js
index 602f5e6..dc03bc2 100644 (file)
--- a/test/unit/offset.js
+++ b/test/unit/offset.js
@@ -1,6 +1,8 @@
 module("offset");
 
 testoffset("absolute", function( jQuery ) {
+       expect(144);
+       
        // get offset tests
        var tests = [
                { id: '#absolute-1',     top:  1, left:  1 }, 
@@ -51,6 +53,16 @@ testoffset("absolute", function( jQuery ) {
                equals( jQuery( this.id ).offset().top,  this.top,  "jQuery('" + this.id + "').offset({ top: "  + this.top  + " })" );
                equals( jQuery( this.id ).offset().left, this.left, "jQuery('" + this.id + "').offset({ left: " + this.left + " })" );
                
+               var top = this.top, left = this.left;
+               
+               jQuery( this.id ).offset(function(i, val){
+                       equals( val.top, top, "Verify incoming top position." );
+                       equals( val.left, left, "Verify incoming top position." );
+                       return { top: top + 1, left: left + 1 };
+               });
+               equals( jQuery( this.id ).offset().top,  this.top + 1,  "jQuery('" + this.id + "').offset({ top: "  + this.top  + " })" );
+               equals( jQuery( this.id ).offset().left, this.left + 1, "jQuery('" + this.id + "').offset({ left: " + this.left + " })" );
+               
                jQuery( this.id ).offset({ top: this.top, left: this.left, using: function( props ) {
                        jQuery( this ).css({
                                top:  props.top  + 1,
@@ -63,6 +75,8 @@ testoffset("absolute", function( jQuery ) {
 });
 
 testoffset("relative", function( jQuery ) {
+       expect(60);
+       
        // IE is collapsing the top margin of 1px
        var ie = jQuery.browser.msie && parseInt( jQuery.browser.version ) < 8;
        
@@ -122,6 +136,8 @@ testoffset("relative", function( jQuery ) {
 });
 
 testoffset("static", function( jQuery ) {
+       expect(80);
+       
        // IE is collapsing the top margin of 1px
        var ie = jQuery.browser.msie && parseInt( jQuery.browser.version ) < 8;
        
@@ -187,6 +203,8 @@ testoffset("static", function( jQuery ) {
 });
 
 testoffset("fixed", function( jQuery ) {
+       expect(28);
+       
        jQuery.offset.initialize();
        
        var tests = [
@@ -238,31 +256,18 @@ testoffset("fixed", function( jQuery ) {
 });
 
 testoffset("table", function( jQuery ) {
-       var ie = jQuery.browser.msie;
+       expect(4);
        
        equals( jQuery('#table-1').offset().top, 6, "jQuery('#table-1').offset().top" );
        equals( jQuery('#table-1').offset().left, 6, "jQuery('#table-1').offset().left" );
        
        equals( jQuery('#th-1').offset().top, 10, "jQuery('#th-1').offset().top" );
        equals( jQuery('#th-1').offset().left, 10, "jQuery('#th-1').offset().left" );
-       
-       // equals( jQuery('#th-2').offset().top, 10, "jQuery('#th-2').offset().top" );
-       // equals( jQuery('#th-2').offset().left, 116, "jQuery('#th-2').offset().left" );
-       // 
-       // equals( jQuery('#th-3').offset().top, 10, "jQuery('#th-3').offset().top" );
-       // equals( jQuery('#th-3').offset().left, 222, "jQuery('#th-3').offset().left" );
-       
-       // equals( jQuery('#td-1').offset().top, ie ? 116 : 112, "jQuery('#td-1').offset().top" );
-       // equals( jQuery('#td-1').offset().left, 10, "jQuery('#td-1').offset().left" );
-       // 
-       // equals( jQuery('#td-2').offset().top, ie ? 116 : 112, "jQuery('#td-2').offset().top" );
-       // equals( jQuery('#td-2').offset().left, 116, "jQuery('#td-2').offset().left" );
-       // 
-       // equals( jQuery('#td-3').offset().top, ie ? 116 : 112, "jQuery('#td-3').offset().top" );
-       // equals( jQuery('#td-3').offset().left, 222, "jQuery('#td-3').offset().left" );
 });
 
 testoffset("scroll", function( jQuery, win ) {
+       expect(12);
+       
        var ie = jQuery.browser.msie && parseInt( jQuery.browser.version ) < 8;
        
        // IE is collapsing the top margin of 1px
@@ -294,6 +299,8 @@ testoffset("scroll", function( jQuery, win ) {
 });
 
 testoffset("body", function( jQuery ) {
+       expect(2);
+       
        equals( jQuery('body').offset().top, 1, "jQuery('#body').offset().top" );
        equals( jQuery('body').offset().left, 1, "jQuery('#body').offset().left" );
 });