X-Git-Url: http://git.asbjorn.biz/?p=jquery.git;a=blobdiff_plain;f=src%2Foffset.js;h=2040c9d83ac9d5db4f15159cc980fbab5c2506fd;hp=20805de1c7d3b94f76095e8cf2178f7983f2547f;hb=69497c3fd7ff560be0e47b4c65076915cca756bc;hpb=c9899a74ac7b7ddb8663f4aa074c1c05f6514e5a diff --git a/src/offset.js b/src/offset.js index 20805de..2040c9d 100644 --- a/src/offset.js +++ b/src/offset.js @@ -1,91 +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 absolute = jQuery.css(elem, "position") == "absolute", - parent = elem.parentNode, - offsetParent = elem.offsetParent, - doc = elem.ownerDocument, - safari2 = safari && parseInt(version) < 522; - - // 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 IE 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 ); +(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: 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; } - - // 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]$/i.test(offsetParent.tagName) || safari && parseInt(version) >= 522 ) - border( offsetParent ); - - // Safari <= 2 doubles body offsets with an absolutely positioned element or parent - if ( safari2 && !absolute && jQuery.css(offsetParent, "position") == "absolute" ) - absolute = true; - - // Get next offsetParent - offsetParent = offsetParent.offsetParent; + + computedStyle = defaultView ? defaultView.getComputedStyle(elem, null) : elem.currentStyle; + top -= elem.scrollTop; + left -= elem.scrollLeft; + + if ( elem === offsetParent ) { + top += elem.offsetTop; + left += elem.offsetLeft; + + if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && rtable.test(elem.nodeName)) ) { + top += parseFloat( computedStyle.borderTopWidth ) || 0; + left += parseFloat( computedStyle.borderLeftWidth ) || 0; + } + + prevOffsetParent = offsetParent; + offsetParent = elem.offsetParent; } - - // Get parent scroll offsets - while ( parent.tagName && !/^body|html$/i.test(parent.tagName) ) { - // Work around opera inline/table scrollLeft/Top bug - if ( !/^inline|table-row.*$/i.test(jQuery.css(parent, "display")) ) - // 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 doubles body offsets with an absolutely positioned element or parent - if ( safari2 && absolute ) - add( -doc.body.offsetLeft, -doc.body.offsetTop ); + + 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; + } - return results; + if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) { + top += Math.max( docElem.scrollTop, body.scrollTop ); + left += Math.max( docElem.scrollLeft, body.scrollLeft ); + } - function border(elem) { - add( jQuery.css(elem, "borderLeftWidth"), jQuery.css(elem, "borderTopWidth") ); - } + 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 = "
"; + + jQuery.extend( container.style, { position: "absolute", top: 0, left: 0, margin: 0, border: 0, width: "1px", height: "1px", visibility: "hidden" } ); + + container.innerHTML = html; + body.insertBefore( container, body.firstChild ); + innerDiv = container.firstChild; + checkDiv = innerDiv.firstChild; + td = innerDiv.nextSibling.firstChild.firstChild; + + this.doesNotAddBorder = (checkDiv.offsetTop !== 5); + this.doesAddBorderForTableAndCells = (td.offsetTop === 5); + + checkDiv.style.position = "fixed"; + checkDiv.style.top = "20px"; + + // safari subtracts parent border width here which is 5px + this.supportsFixedPosition = (checkDiv.offsetTop === 20 || checkDiv.offsetTop === 15); + checkDiv.style.position = checkDiv.style.top = ""; + + innerDiv.style.overflow = "hidden"; + innerDiv.style.position = "relative"; + + this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5); + + this.doesNotIncludeMarginInBodyOffset = (body.offsetTop !== bodyMarginTop); + + body.removeChild( container ); + body = container = innerDiv = checkDiv = table = td = null; + jQuery.offset.initialize = jQuery.noop; + }, - function add(l, t) { - left += parseInt(l) || 0; - top += parseInt(t) || 0; + bodyOffset: function( body ) { + var top = body.offsetTop, + left = body.offsetLeft; + + jQuery.offset.initialize(); + + if ( jQuery.offset.doesNotIncludeMarginInBodyOffset ) { + top += parseFloat( jQuery.css(body, "marginTop") ) || 0; + left += parseFloat( jQuery.css(body, "marginLeft") ) || 0; + } + + return { top: top, left: left }; + }, + + setOffset: function( elem, options, i ) { + var position = jQuery.css( elem, "position" ); + + // set position first, in-case top/left are set even on static elem + if ( position === "static" ) { + elem.style.position = "relative"; + } + + var curElem = jQuery( elem ), + curOffset = curElem.offset(), + curCSSTop = jQuery.css( elem, "top" ), + curCSSLeft = jQuery.css( elem, "left" ), + calculatePosition = (position === "absolute" && jQuery.inArray('auto', [curCSSTop, curCSSLeft]) > -1), + props = {}, curPosition = {}, curTop, curLeft; + + // need to be able to calculate position if either top or left is auto and position is absolute + if ( calculatePosition ) { + curPosition = curElem.position(); + } + + curTop = calculatePosition ? curPosition.top : parseInt( curCSSTop, 10 ) || 0; + curLeft = calculatePosition ? curPosition.left : parseInt( curCSSLeft, 10 ) || 0; + + if ( jQuery.isFunction( options ) ) { + options = options.call( elem, i, curOffset ); + } + + if (options.top != null) { + props.top = (options.top - curOffset.top) + curTop; + } + if (options.left != null) { + props.left = (options.left - curOffset.left) + curLeft; + } + + if ( "using" in options ) { + options.using.call( elem, props ); + } else { + curElem.css( props ); + } } }; + + +jQuery.fn.extend({ + position: function() { + if ( !this[0] ) { + return null; + } + + var elem = this[0], + + // Get *real* offsetParent + offsetParent = this.offsetParent(), + + // Get correct offsets + offset = this.offset(), + parentOffset = rroot.test(offsetParent[0].nodeName) ? { 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 -= parseFloat( jQuery.css(elem, "marginTop") ) || 0; + offset.left -= parseFloat( jQuery.css(elem, "marginLeft") ) || 0; + + // Add offsetParent borders + parentOffset.top += parseFloat( jQuery.css(offsetParent[0], "borderTopWidth") ) || 0; + parentOffset.left += parseFloat( jQuery.css(offsetParent[0], "borderLeftWidth") ) || 0; + + // Subtract the two offsets + return { + top: offset.top - parentOffset.top, + left: offset.left - parentOffset.left + }; + }, + + offsetParent: function() { + return this.map(function() { + var offsetParent = this.offsetParent || document.body; + while ( offsetParent && (!rroot.test(offsetParent.nodeName) && jQuery.css(offsetParent, "position") === "static") ) { + offsetParent = offsetParent.offsetParent; + } + return offsetParent; + }); + } +}); + + +// Create scrollLeft and scrollTop methods +jQuery.each( ["Left", "Top"], function( i, name ) { + var method = "scroll" + name; + + jQuery.fn[ method ] = function(val) { + var elem = this[0], win; + + if ( !elem ) { + return null; + } + + if ( val !== undefined ) { + // Set the scroll offset + return this.each(function() { + win = getWindow( this ); + + if ( win ) { + win.scrollTo( + !i ? val : jQuery(win).scrollLeft(), + i ? val : jQuery(win).scrollTop() + ); + + } else { + this[ method ] = val; + } + }); + } else { + win = getWindow( elem ); + + // Return the scroll offset + return win ? ("pageXOffset" in win) ? win[ i ? "pageYOffset" : "pageXOffset" ] : + jQuery.support.boxModel && win.document.documentElement[ method ] || + win.document.body[ method ] : + elem[ method ]; + } + }; +}); + +function getWindow( elem ) { + return jQuery.isWindow( elem ) ? + elem : + elem.nodeType === 9 ? + elem.defaultView || elem.parentWindow : + false; +} + +})( jQuery );