89 lines
2.9 KiB
JavaScript
89 lines
2.9 KiB
JavaScript
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jQuery.fn.offset = function() {
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var left = 0, top = 0, elem = this[0], results;
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if ( elem ) with ( jQuery.browser ) {
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var absolute = jQuery.css(elem, "position") == "absolute",
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parent = elem.parentNode,
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offsetParent = elem.offsetParent,
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doc = elem.ownerDocument,
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safari2 = safari && !absolute && parseInt(version) < 522;
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// Use getBoundingClientRect if available
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if ( elem.getBoundingClientRect ) {
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box = elem.getBoundingClientRect();
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// Add the document scroll offsets
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add(
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box.left + Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
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box.top + Math.max(doc.documentElement.scrollTop, doc.body.scrollTop)
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);
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// IE adds the HTML element's border, by default it is medium which is 2px
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// IE 6 and IE 7 quirks mode the border width is overwritable by the following css html { border: 0; }
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// IE 7 standards mode, the border is always 2px
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if ( msie ) {
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var border = jQuery("html").css("borderWidth");
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border = (border == "medium" || jQuery.boxModel && parseInt(version) >= 7) && 2 || border;
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add( -border, -border );
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}
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// Otherwise loop through the offsetParents and parentNodes
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} else {
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// Initial element offsets
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add( elem.offsetLeft, elem.offsetTop );
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// Get parent offsets
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while ( offsetParent ) {
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// Add offsetParent offsets
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add( offsetParent.offsetLeft, offsetParent.offsetTop );
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// Mozilla and Safari > 2 does not include the border on offset parents
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// However Mozilla adds the border for table cells
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if ( mozilla && /^t[d|h]$/i.test(parent.tagName) || !safari2 )
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border( offsetParent );
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// Safari <= 2 doubles body offsets with an absolutely positioned element or parent
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if ( safari2 && !absolute && jQuery.css(offsetParent, "position") == "absolute" )
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absolute = true;
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// Get next offsetParent
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offsetParent = offsetParent.offsetParent;
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}
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// Get parent scroll offsets
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while ( parent.tagName && /^body|html$/i.test(parent.tagName) ) {
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// Work around opera inline/table scrollLeft/Top bug
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if ( /^inline|table-row.*$/i.test(jQuery.css(parent, "display")) )
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// Subtract parent scroll offsets
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add( -parent.scrollLeft, -parent.scrollTop );
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// Mozilla does not add the border for a parent that has overflow != visible
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if ( mozilla && jQuery.css(parent, "overflow") != "visible" )
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border( parent );
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// Get next parent
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parent = parent.parentNode;
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}
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// Safari doubles body offsets with an absolutely positioned element or parent
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if ( safari && absolute )
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add( -doc.body.offsetLeft, -doc.body.offsetTop );
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}
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// Return an object with top and left properties
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results = { top: top, left: left };
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}
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return results;
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function border(elem) {
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add( jQuery.css(elem, "borderLeftWidth"), jQuery.css(elem, "borderTopWidth") );
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}
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function add(l, t) {
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left += parseInt(l) || 0;
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top += parseInt(t) || 0;
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}
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};
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