Ticket #4136: offset_patch.js

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File offset_patch.js, 2.6 KB (added by mike.helgeson, February 12, 2009 04:11PM UTC)

if ( document.documentElement["getBoundingClientRect"] )
	jQuery.fn.offset = function() {
		if ( !this[0] || !this[0].ownerDocument ) return { top: 0, left: 0 };
		if ( this[0] === this[0].ownerDocument.body ) return jQuery.offset.bodyOffset( this[0] );
		var box  = this[0].getBoundingClientRect(), doc = this[0].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.boxModel && docElem.scrollTop  || body.scrollTop ) - clientTop,
			left = box.left + (self.pageXOffset || jQuery.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft;
		return { top: top, left: left };
	};
else 
	jQuery.fn.offset = function() {
		if ( !this[0] || !this[0].ownerDocument ) return { top: 0, left: 0 };
		if ( this[0] === this[0].ownerDocument.body ) return jQuery.offset.bodyOffset( this[0] );
		jQuery.offset.initialized || jQuery.offset.initialize();

		var elem = this[0], offsetParent = elem.offsetParent, prevOffsetParent = elem,
			doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement,
			body = doc.body, defaultView = doc.defaultView,
			prevComputedStyle = defaultView.getComputedStyle(elem, null),
			top = elem.offsetTop, left = elem.offsetLeft;

		while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
			computedStyle = defaultView.getComputedStyle(elem, null);
			top -= elem.scrollTop, left -= elem.scrollLeft;
			if ( elem === offsetParent ) {
				top += elem.offsetTop, left += elem.offsetLeft;
				if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.tagName)) )
					top  += parseInt( computedStyle.borderTopWidth,  10) || 0,
					left += parseInt( computedStyle.borderLeftWidth, 10) || 0;
				prevOffsetParent = offsetParent, offsetParent = elem.offsetParent;
			}
			if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" )
				top  += parseInt( computedStyle.borderTopWidth,  10) || 0,
				left += parseInt( computedStyle.borderLeftWidth, 10) || 0;
			prevComputedStyle = computedStyle;
		}

		if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" )
			top  += body.offsetTop,
			left += body.offsetLeft;

		if ( prevComputedStyle.position === "fixed" )
			top  += Math.max(docElem.scrollTop, body.scrollTop),
			left += Math.max(docElem.scrollLeft, body.scrollLeft);

		return { top: top, left: left };
	};

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