X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=257035816169df4face0b3c50a289b900850806d;hb=01e8f33e44b8ee4aa61b48d60cfcae34ac12fcf1;hp=f59fb9b27caa565d414f4b759de81ecf351ac0e0;hpb=415a0916b54a0dd3123893d67cc9091dd8ebe1d6;p=jquery.git

diff --git a/src/offset.js b/src/offset.js
index f59fb9b..2570358 100644
--- a/src/offset.js
+++ b/src/offset.js
@@ -5,59 +5,59 @@ jQuery.fn.offset = function() {
 	var left = 0, top = 0, elem = this[0], results;
 	
 	if ( elem ) with ( jQuery.browser ) {
-		var	absolute     = jQuery.css(elem, "position") == "absolute", 
-		    parent       = elem.parentNode, 
+		var parent       = elem.parentNode, 
+		    offsetChild  = elem,
 		    offsetParent = elem.offsetParent, 
 		    doc          = elem.ownerDocument,
-		    safari2      = safari && parseInt(version) < 522;
+		    safari2      = safari && parseInt(version) < 522,
+		    fixed        = jQuery.css(elem, "position") == "fixed";
 	
 		// Use getBoundingClientRect if available
 		if ( elem.getBoundingClientRect ) {
 			var box = elem.getBoundingClientRect();
 		
 			// Add the document scroll offsets
-			add(
-				box.left + Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
-				box.top  + Math.max(doc.documentElement.scrollTop,  doc.body.scrollTop)
-			);
+			add(box.left + Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
+				box.top  + Math.max(doc.documentElement.scrollTop,  doc.body.scrollTop));
 		
 			// IE adds the HTML element's border, by default it is medium which is 2px
-			// IE 6 and IE 7 quirks mode the border width is overwritable by the following css html { border: 0; }
+			// IE 6 and 7 quirks mode the border width is overwritable by the following css html { border: 0; }
 			// IE 7 standards mode, the border is always 2px
-			if ( msie ) {
-				var border = jQuery("html").css("borderWidth");
-				border = (border == "medium" || jQuery.boxModel && parseInt(version) >= 7) && 2 || border;
-				add( -border, -border );
-			}
+			// This border/offset is typically represented by the clientLeft and clientTop properties
+			// However, in IE6 and 7 quirks mode the clientLeft and clientTop properties are not updated when overwriting it via CSS
+			// Therefore this method will be off by 2px in IE while in quirksmode
+			add( -doc.documentElement.clientLeft, -doc.documentElement.clientTop );
 	
 		// Otherwise loop through the offsetParents and parentNodes
 		} else {
 		
 			// Initial element offsets
 			add( elem.offsetLeft, elem.offsetTop );
-		
+			
 			// Get parent offsets
 			while ( offsetParent ) {
 				// Add offsetParent offsets
 				add( offsetParent.offsetLeft, offsetParent.offsetTop );
 			
 				// Mozilla and Safari > 2 does not include the border on offset parents
-				// However Mozilla adds the border for table cells
-				if ( mozilla && /^t[d|h]$/i.test(parent.tagName) || !safari2 )
+				// However Mozilla adds the border for table or table cells
+				if ( mozilla && !/^t(able|d|h)$/i.test(offsetParent.tagName) || safari && !safari2 )
 					border( offsetParent );
-				
-				// Safari <= 2 doubles body offsets with an absolutely positioned element or parent
-				if ( safari2 && !absolute && jQuery.css(offsetParent, "position") == "absolute" )
-					absolute = true;
+					
+				// Add the document scroll offsets if position is fixed on any offsetParent
+				if ( !fixed && jQuery.css(offsetParent, "position") == "fixed" )
+					fixed = true;
 			
+				// Set offsetChild to previous offsetParent unless it is the body element
+				offsetChild  = /^body$/i.test(offsetParent.tagName) ? offsetChild : offsetParent;
 				// Get next offsetParent
 				offsetParent = offsetParent.offsetParent;
 			}
 		
 			// Get parent scroll offsets
 			while ( parent.tagName && !/^body|html$/i.test(parent.tagName) ) {
-				// Work around opera inline/table scrollLeft/Top bug
-				if ( !/^inline|table-row.*$/i.test(jQuery.css(parent, "display")) )
+				// Remove parent scroll UNLESS that parent is inline or a table to work around Opera inline/table scrollLeft/Top bug
+				if ( !/^inline|table.*$/i.test(jQuery.css(parent, "display")) )
 					// Subtract parent scroll offsets
 					add( -parent.scrollLeft, -parent.scrollTop );
 			
@@ -69,9 +69,16 @@ jQuery.fn.offset = function() {
 				parent = parent.parentNode;
 			}
 		
-			// Safari doubles body offsets with an absolutely positioned element or parent
-			if ( safari2 && absolute )
-				add( -doc.body.offsetLeft, -doc.body.offsetTop );
+			// Safari <= 2 doubles body offsets with a fixed position element/offsetParent or absolutely positioned offsetChild
+			// Mozilla doubles body offsets with a non-absolutely positioned offsetChild
+			if ( (safari2 && (fixed || jQuery.css(offsetChild, "position") == "absolute")) || 
+				(mozilla && jQuery.css(offsetChild, "position") != "absoltue") )
+					add( -doc.body.offsetLeft, -doc.body.offsetTop );
+			
+			// Add the document scroll offsets if position is fixed
+			if ( fixed )
+				add(Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
+					Math.max(doc.documentElement.scrollTop,  doc.body.scrollTop));
 		}
 
 		// Return an object with top and left properties