X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;ds=inline;f=src%2Foffset.js;h=a10d30a0fefb1a4d6c8ffeba99c1104aba2b69cb;hb=3e1d3d0f21d1b292fe721b4f483b3a3bc2dadd86;hp=b29fcc7c2914b68db2eeb1108d8b22e311c73770;hpb=e71e4a47f35a4380664b6cc209e482adea6b4b14;p=jquery.git diff --git a/src/offset.js b/src/offset.js index b29fcc7..a10d30a 100644 --- a/src/offset.js +++ b/src/offset.js @@ -1,98 +1,305 @@ -// 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), - fixed = jQuery.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 { - - // 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)$/i.test(offsetParent.tagName) || safari && !safari2 ) - border( offsetParent ); - - // Add the document scroll offsets if position is fixed on any offsetParent - if ( !fixed && jQuery.css(offsetParent, "position") == "fixed" ) - fixed = true; - - // Set offsetChild to previous offsetParent unless it is the body element - offsetChild = /^body$/i.test(offsetParent.tagName) ? offsetChild : offsetParent; - // Get next offsetParent - offsetParent = offsetParent.offsetParent; +(function( jQuery ) { + +var rtable = /^t(?:able|d|h)$/i, + rroot = /^(?:body|html)$/i; + +if ( "getBoundingClientRect" in document.documentElement ) { + jQuery.fn.offset = function( options ) { + var elem = this[0], box; + + if ( options ) { + return this.each(function( i ) { + jQuery.offset.setOffset( this, options, i ); + }); + } + + if ( !elem || !elem.ownerDocument ) { + return null; + } + + if ( elem === elem.ownerDocument.body ) { + return jQuery.offset.bodyOffset( elem ); + } + + try { + box = elem.getBoundingClientRect(); + } catch(e) {} + + var doc = elem.ownerDocument, + docElem = doc.documentElement; + + // Make sure we're not dealing with a disconnected DOM node + if ( !box || !jQuery.contains( docElem, elem ) ) { + return box ? { top: box.top, left: box.left } : { top: 0, left: 0 }; + } + + var body = doc.body, + win = getWindow(doc), + clientTop = docElem.clientTop || body.clientTop || 0, + clientLeft = docElem.clientLeft || body.clientLeft || 0, + scrollTop = (win.pageYOffset || jQuery.support.boxModel && docElem.scrollTop || body.scrollTop ), + scrollLeft = (win.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft), + top = box.top + scrollTop - clientTop, + left = box.left + scrollLeft - clientLeft; + + return { top: top, left: left }; + }; + +} else { + jQuery.fn.offset = function( options ) { + var elem = this[0]; + + if ( options ) { + return this.each(function( i ) { + jQuery.offset.setOffset( this, options, i ); + }); + } + + if ( !elem || !elem.ownerDocument ) { + return null; + } + + if ( elem === elem.ownerDocument.body ) { + return jQuery.offset.bodyOffset( elem ); + } + + jQuery.offset.initialize(); + + var computedStyle, + offsetParent = elem.offsetParent, + prevOffsetParent = elem, + doc = elem.ownerDocument, + 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; + } + + computedStyle = defaultView ? defaultView.getComputedStyle(elem, null) : elem.currentStyle; + top -= elem.scrollTop; + left -= elem.scrollLeft; + + if ( elem === offsetParent ) { + top += elem.offsetTop; + left += elem.offsetLeft; + + if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && rtable.test(elem.nodeName)) ) { + top += parseFloat( computedStyle.borderTopWidth ) || 0; + left += parseFloat( computedStyle.borderLeftWidth ) || 0; + } + + prevOffsetParent = offsetParent; + offsetParent = elem.offsetParent; } - - // 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(jQuery.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" ) - border( parent ); - - // Get next parent - parent = parent.parentNode; + + if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) { + top += parseFloat( computedStyle.borderTopWidth ) || 0; + left += parseFloat( computedStyle.borderLeftWidth ) || 0; } - - // 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") ) - 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)); - } - - // Return an object with top and left properties - results = { top: top, left: left }; - } - function border(elem) { - add( jQuery.curCSS(elem, "borderLeftWidth", true), jQuery.curCSS(elem, "borderTopWidth", true) ); + prevComputedStyle = computedStyle; + } + + if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) { + top += body.offsetTop; + left += body.offsetLeft; + } + + if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) { + top += Math.max( docElem.scrollTop, body.scrollTop ); + left += Math.max( docElem.scrollLeft, body.scrollLeft ); + } + + return { top: top, left: left }; + }; +} + +jQuery.offset = { + initialize: function() { + var body = document.body, container = document.createElement("div"), innerDiv, checkDiv, table, td, bodyMarginTop = parseFloat( jQuery.css(body, "marginTop") ) || 0, + html = "