X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=69258390061382b6dbce78c0f8c701c1cea7b664;hb=61e37d41490aed319a176c6ca7feb95e5505059c;hp=4de37a0ba3de65d264eef38403d8ffaffb280f60;hpb=3f5ff3097c315456fe92c9b1e4578590e1eb8648;p=jquery.git diff --git a/src/offset.js b/src/offset.js index 4de37a0..6925839 100644 --- a/src/offset.js +++ b/src/offset.js @@ -1,165 +1,251 @@ -// The Offset Method -// Originally By Brandon Aaron, part of the Dimension Plugin -// 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, - offsetChild = elem, - offsetParent = elem.offsetParent, - doc = elem.ownerDocument, - 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 - // 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 { +if ( "getBoundingClientRect" in document.documentElement ) { + jQuery.fn.offset = function( options ) { + var elem = this[0]; - // Initial element offsets - add( elem.offsetLeft, elem.offsetTop ); + if ( !elem || !elem.ownerDocument ) { + return null; + } - // Get parent offsets - while ( offsetParent ) { - // Add offsetParent offsets - add( offsetParent.offsetLeft, offsetParent.offsetTop ); + if ( options ) { + return this.each(function() { + jQuery.offset.setOffset( this, options ); + }); + } - // 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)$/i.test(offsetParent.tagName) || safari && !safari2 ) - border( offsetParent ); + if ( elem === elem.ownerDocument.body ) { + return jQuery.offset.bodyOffset( elem ); + } - // Add the document scroll offsets if position is fixed on any offsetParent - if ( !fixed && css(offsetParent, "position") == "fixed" ) - fixed = true; + var box = elem.getBoundingClientRect(), doc = elem.ownerDocument, body = doc.body, docElem = doc.documentElement, + clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0, + top = box.top + (self.pageYOffset || jQuery.support.boxModel && docElem.scrollTop || body.scrollTop ) - clientTop, + left = box.left + (self.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft; - // Set offsetChild to previous offsetParent unless it is the body element - offsetChild = /^body$/i.test(offsetParent.tagName) ? offsetChild : offsetParent; - // Get next offsetParent - offsetParent = offsetParent.offsetParent; + return { top: top, left: left }; + }; + +} else { + jQuery.fn.offset = function( options ) { + var elem = this[0]; + + if ( !elem || !elem.ownerDocument ) { + return null; + } + + if ( options ) { + return this.each(function() { + jQuery.offset.setOffset( this, options ); + }); + } + + if ( elem === elem.ownerDocument.body ) { + return jQuery.offset.bodyOffset( elem ); + } + + jQuery.offset.initialize(); + + var offsetParent = elem.offsetParent, prevOffsetParent = elem, + doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement, + body = doc.body, defaultView = doc.defaultView, + prevComputedStyle = defaultView ? defaultView.getComputedStyle( elem, null ) : elem.currentStyle, + top = elem.offsetTop, left = elem.offsetLeft; + + while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) { + if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) { + break; } - // Get parent scroll offsets - 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 ); + computedStyle = defaultView ? defaultView.getComputedStyle(elem, null) : elem.currentStyle; + top -= elem.scrollTop; + left -= elem.scrollLeft; - // Mozilla does not add the border for a parent that has overflow != visible - if ( mozilla && css(parent, "overflow") != "visible" ) - border( parent ); + if ( elem === offsetParent ) { + top += elem.offsetTop; + left += elem.offsetLeft; - // Get next parent - parent = parent.parentNode; + if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.nodeName)) ) { + top += parseFloat( computedStyle.borderTopWidth ) || 0; + left += parseFloat( computedStyle.borderLeftWidth ) || 0; + } + + prevOffsetParent = offsetParent, offsetParent = elem.offsetParent; } - // 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 ); + if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) { + top += parseFloat( computedStyle.borderTopWidth ) || 0; + left += parseFloat( computedStyle.borderLeftWidth ) || 0; + } - // 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)); + prevComputedStyle = computedStyle; } - // Return an object with top and left properties - results = { top: top, left: left }; - } + if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) { + top += body.offsetTop; + left += body.offsetLeft; + } - function border(elem) { - add( jQuery.curCSS(elem, "borderLeftWidth", true), jQuery.curCSS(elem, "borderTopWidth", true) ); - } + if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) { + top += Math.max( docElem.scrollTop, body.scrollTop ); + left += Math.max( docElem.scrollLeft, body.scrollLeft ); + } - function add(l, t) { - left += parseInt(l) || 0; - top += parseInt(t) || 0; - } + return { top: top, left: left }; + }; +} + +jQuery.offset = { + initialize: function() { + var body = document.body, container = document.createElement('div'), innerDiv, checkDiv, table, td, bodyMarginTop = parseFloat( jQuery.curCSS(body, 'marginTop', true) ) || 0, + html = '