X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=c38a7f2163e1c55733731478f9c61026f46bcff5;hb=bca576550249e9b79b1097669dff6d4ddd0d65cf;hp=d12921dffc7baca43773d411889ed23fcc53aa96;hpb=6cb2945837ccca55204191a8e7a70b2b2486c28e;p=jquery.git

diff --git a/src/offset.js b/src/offset.js
index d12921d..c38a7f2 100644
--- a/src/offset.js
+++ b/src/offset.js
@@ -1,25 +1,34 @@
+(function( jQuery ) {
+
 if ( "getBoundingClientRect" in document.documentElement ) {
 	jQuery.fn.offset = function( options ) {
 		var elem = this[0];
 
-		if ( !elem || !elem.ownerDocument ) {
-			return null;
-		}
-
 		if ( options ) { 
-			return this.each(function() {
-				jQuery.offset.setOffset( this, options );
+			return this.each(function( i ) {
+				jQuery.offset.setOffset( this, options, i );
 			});
 		}
 
+		if ( !elem || !elem.ownerDocument ) {
+			return null;
+		}
+
 		if ( elem === elem.ownerDocument.body ) {
 			return jQuery.offset.bodyOffset( elem );
 		}
 
-		var box = elem.getBoundingClientRect(), doc = elem.ownerDocument, body = doc.body, docElem = doc.documentElement,
-			clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0,
-			top  = box.top  + (self.pageYOffset || jQuery.support.boxModel && docElem.scrollTop  || body.scrollTop ) - clientTop,
-			left = box.left + (self.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft;
+		var box = elem.getBoundingClientRect(),
+			doc = elem.ownerDocument,
+			body = doc.body,
+			docElem = doc.documentElement,
+			win = getWindow(doc),
+			clientTop  = docElem.clientTop  || body.clientTop  || 0,
+			clientLeft = docElem.clientLeft || body.clientLeft || 0,
+			scrollTop  = (win.pageYOffset || jQuery.support.boxModel && docElem.scrollTop  || body.scrollTop ),
+			scrollLeft = (win.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft),
+			top  = box.top  + scrollTop  - clientTop,
+			left = box.left + scrollLeft - clientLeft;
 
 		return { top: top, left: left };
 	};
@@ -28,16 +37,16 @@ if ( "getBoundingClientRect" in document.documentElement ) {
 	jQuery.fn.offset = function( options ) {
 		var elem = this[0];
 
-		if ( !elem || !elem.ownerDocument ) {
-			return null;
-		}
-
 		if ( options ) { 
-			return this.each(function() {
-				jQuery.offset.setOffset( this, options );
+			return this.each(function( i ) {
+				jQuery.offset.setOffset( this, options, i );
 			});
 		}
 
+		if ( !elem || !elem.ownerDocument ) {
+			return null;
+		}
+
 		if ( elem === elem.ownerDocument.body ) {
 			return jQuery.offset.bodyOffset( elem );
 		}
@@ -68,7 +77,8 @@ if ( "getBoundingClientRect" in document.documentElement ) {
 					left += parseFloat( computedStyle.borderLeftWidth ) || 0;
 				}
 
-				prevOffsetParent = offsetParent, offsetParent = elem.offsetParent;
+				prevOffsetParent = offsetParent;
+				offsetParent = elem.offsetParent;
 			}
 
 			if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) {
@@ -109,12 +119,16 @@ jQuery.offset = {
 		this.doesNotAddBorder = (checkDiv.offsetTop !== 5);
 		this.doesAddBorderForTableAndCells = (td.offsetTop === 5);
 
-		checkDiv.style.position = "fixed", checkDiv.style.top = "20px";
+		checkDiv.style.position = "fixed";
+		checkDiv.style.top = "20px";
+
 		// safari subtracts parent border width here which is 5px
 		this.supportsFixedPosition = (checkDiv.offsetTop === 20 || checkDiv.offsetTop === 15);
 		checkDiv.style.position = checkDiv.style.top = "";
 
-		innerDiv.style.overflow = "hidden", innerDiv.style.position = "relative";
+		innerDiv.style.overflow = "hidden";
+		innerDiv.style.position = "relative";
+
 		this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
 
 		this.doesNotIncludeMarginInBodyOffset = (body.offsetTop !== bodyMarginTop);
@@ -137,19 +151,39 @@ jQuery.offset = {
 		return { top: top, left: left };
 	},
 	
-	setOffset: function( elem, options ) {
+	setOffset: function( elem, options, i ) {
+		var position = jQuery.curCSS( elem, "position" );
+
 		// set position first, in-case top/left are set even on static elem
-		if ( /static/.test( jQuery.curCSS( elem, "position" ) ) ) {
+		if ( position === "static" ) {
 			elem.style.position = "relative";
 		}
-		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
-			};
+
+		var curElem    = jQuery( elem ),
+			curOffset  = curElem.offset(),
+			curCSSTop  = jQuery.curCSS( elem, "top", true ),
+			curCSSLeft = jQuery.curCSS( elem, "left", true ),
+			calculatePosition = (position === "absolute" && jQuery.inArray('auto', [curCSSTop, curCSSLeft]) > -1),
+			props = {}, curPosition = {}, curTop, curLeft;
+
+		// need to be able to calculate position if either top or left is auto and position is absolute
+		if ( calculatePosition ) {
+			curPosition = curElem.position();
+		}
+
+		curTop  = calculatePosition ? curPosition.top  : parseInt( curCSSTop,  10 ) || 0;
+		curLeft = calculatePosition ? curPosition.left : parseInt( curCSSLeft, 10 ) || 0;
+
+		if ( jQuery.isFunction( options ) ) {
+			options = options.call( elem, i, curOffset );
+		}
+
+		if (options.top != null) {
+			props.top = (options.top - curOffset.top) + curTop;
+		}
+		if (options.left != null) {
+			props.left = (options.left - curOffset.left) + curLeft;
+		}
 		
 		if ( "using" in options ) {
 			options.using.call( elem, props );
@@ -249,3 +283,5 @@ function getWindow( elem ) {
 			elem.defaultView || elem.parentWindow :
 			false;
 }
+
+})( jQuery );