X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=ef999d8a460f7620c3284f2c6c91a6e0a62a553b;hb=82ba3709eec42dd8da33eb2023fda927166260eb;hp=cf1af337d0e2ac47bf9434dcdc8932db1ba3fbbd;hpb=add0681f907c11e1a16b9e4759f575195a790c06;p=jquery.git diff --git a/src/offset.js b/src/offset.js index cf1af33..ef999d8 100644 --- a/src/offset.js +++ b/src/offset.js @@ -3,23 +3,24 @@ // 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, + var parent = elem.parentNode, offsetChild = elem, - offsetParent = elem.offsetParent, + offsetParent = elem.offsetParent, doc = elem.ownerDocument, - safari2 = safari && parseInt(version) < 522, - fixed = jQuery.css(elem, "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)); - + // IE adds the HTML element's border, by default it is medium which is 2px // 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 @@ -27,54 +28,54 @@ jQuery.fn.offset = function() { // 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 or table cells if ( mozilla && !/^t(able|d|h)$/i.test(offsetParent.tagName) || safari && !safari2 ) border( offsetParent ); - + // Add the document scroll offsets if position is fixed on any offsetParent - if ( !fixed && jQuery.css(offsetParent, "position") == "fixed" ) + if ( !fixed && css(offsetParent, "position") == "fixed" ) fixed = true; - + // Set offsetChild to previous offsetParent unless it is the body element offsetChild = /^body$/i.test(offsetParent.tagName) ? offsetChild : offsetParent; // Get next offsetParent offsetParent = offsetParent.offsetParent; } - + // Get parent scroll offsets - while ( parent.tagName && !/^body|html$/i.test(parent.tagName) ) { + while ( parent && parent.tagName && !/^body|html$/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.*$/i.test(jQuery.css(parent, "display")) ) + if ( !/^inline|table.*$/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 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") != "absolute") ) + 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), @@ -90,9 +91,79 @@ jQuery.fn.offset = function() { } 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 ]; + }; +});