X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=ef999d8a460f7620c3284f2c6c91a6e0a62a553b;hb=82ba3709eec42dd8da33eb2023fda927166260eb;hp=a06c36c3835871bf48b18e3031171f3eebe3de24;hpb=595d1253653c618a8a112ec09777c294125195d9;p=jquery.git diff --git a/src/offset.js b/src/offset.js index a06c36c..ef999d8 100644 --- a/src/offset.js +++ b/src/offset.js @@ -3,112 +3,167 @@ // http://jquery.com/plugins/project/dimensions jQuery.fn.offset = function() { var left = 0, top = 0, elem = this[0], results; - + if ( elem ) with ( jQuery.browser ) { - var parent = elem.parentNode, - offsetParent = elem.offsetParent, + var parent = elem.parentNode, + offsetChild = elem, + offsetParent = elem.offsetParent, doc = elem.ownerDocument, - safari2 = safari && parseInt(version) < 522, - position = jQuery.css(elem, "position"), - absolute = position == "absolute", - fixed = position == "fixed"; - + safari2 = safari && parseInt(version) < 522 && !/adobeair/i.test(userAgent), + css = jQuery.curCSS, + fixed = 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 ); - - // Get offsetParent's position - position = jQuery.css(offsetParent, "position"); - - // Safari <= 2 doubles body offsets with an absolutely positioned element or parent - if ( safari2 && !absolute && position == "absolute" ) - absolute = true; - - // Opera adds border for fixed, relative and absolute parent elements - if (opera && /^fixed|relative|absolute$/i.test(position)) - add( - -parseInt(jQuery.css(elem, "borderLeftWidth")), - -parseInt(jQuery.css(elem, "borderTopWidth")) - ); - - // Add the document scroll offsets if position is fixed - if ( !fixed && position == "fixed" ) + + // Add the document scroll offsets if position is fixed on any offsetParent + if ( !fixed && css(offsetParent, "position") == "fixed" ) fixed = true; - + + // Set offsetChild to previous offsetParent unless it is the body element + offsetChild = /^body$/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")) ) + while ( parent && parent.tagName && !/^body|html$/i.test(parent.tagName) ) { + // Remove parent scroll UNLESS that parent is inline or a table to work around Opera inline/table scrollLeft/Top bug + if ( !/^inline|table.*$/i.test(css(parent, "display")) ) // Subtract parent scroll offsets add( -parent.scrollLeft, -parent.scrollTop ); - + // Mozilla does not add the border for a parent that has overflow != visible - if ( mozilla && jQuery.css(parent, "overflow") != "visible" ) + if ( mozilla && css(parent, "overflow") != "visible" ) border( parent ); - + // Get next parent parent = parent.parentNode; } - - // Safari <= 2 doubles body offsets with an absolute or fixed positioned element or parent - if ( safari2 && (absolute || fixed) ) - 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 || css(offsetChild, "position") == "absolute")) || + (mozilla && css(offsetChild, "position") != "absolute") ) + 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) - ); + 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 results = { top: top, left: left }; } - return results; - function border(elem) { - add( jQuery.css(elem, "borderLeftWidth"), jQuery.css(elem, "borderTopWidth") ); + add( jQuery.curCSS(elem, "borderLeftWidth", true), jQuery.curCSS(elem, "borderTopWidth", true) ); } function add(l, t) { - left += parseInt(l) || 0; - top += parseInt(t) || 0; + left += parseInt(l, 10) || 0; + top += parseInt(t, 10) || 0; } + + return results; }; + + +jQuery.fn.extend({ + position: function() { + var left = 0, top = 0, results; + + if ( this[0] ) { + // Get *real* offsetParent + var offsetParent = this.offsetParent(), + + // Get correct offsets + offset = this.offset(), + parentOffset = /^body|html$/i.test(offsetParent[0].tagName) ? { top: 0, left: 0 } : offsetParent.offset(); + + // Subtract element margins + // note: when an element has margin: auto the offsetLeft and marginLeft + // are the same in Safari causing offset.left to incorrectly be 0 + offset.top -= num( this, 'marginTop' ); + offset.left -= num( this, 'marginLeft' ); + + // Add offsetParent borders + parentOffset.top += num( offsetParent, 'borderTopWidth' ); + parentOffset.left += num( offsetParent, 'borderLeftWidth' ); + + // Subtract the two offsets + results = { + top: offset.top - parentOffset.top, + left: offset.left - parentOffset.left + }; + } + + return results; + }, + + offsetParent: function() { + var offsetParent = this[0].offsetParent; + while ( offsetParent && (!/^body|html$/i.test(offsetParent.tagName) && jQuery.css(offsetParent, 'position') == 'static') ) + offsetParent = offsetParent.offsetParent; + return jQuery(offsetParent); + } +}); + + +// Create scrollLeft and scrollTop methods +jQuery.each( ['Left', 'Top'], function(i, name) { + var method = 'scroll' + name; + + jQuery.fn[ method ] = function(val) { + if (!this[0]) return; + + return val != undefined ? + + // Set the scroll offset + this.each(function() { + this == window || this == document ? + window.scrollTo( + !i ? val : jQuery(window).scrollLeft(), + i ? val : jQuery(window).scrollTop() + ) : + this[ method ] = val; + }) : + + // Return the scroll offset + this[0] == window || this[0] == document ? + self[ i ? 'pageYOffset' : 'pageXOffset' ] || + jQuery.boxModel && document.documentElement[ method ] || + document.body[ method ] : + this[0][ method ]; + }; +});