X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=cc1b8744030ceb74b53bfd776336ea3bf510a5db;hb=434b87b8a233eb24ec773de801f3adb460fbd0f4;hp=6289ad29320be3c07e295fbffa80f8dfdada84c6;hpb=28ee5c692245e18bdedcc91372949ec8b784ee36;p=jquery.git diff --git a/src/offset.js b/src/offset.js index 6289ad2..cc1b874 100644 --- a/src/offset.js +++ b/src/offset.js @@ -1,88 +1,155 @@ -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 && !absolute && parseInt(version) < 522; - - // Use getBoundingClientRect if available - if ( elem.getBoundingClientRect ) { - 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 ); - } - - // 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]$/i.test(parent.tagName) || !safari2 ) - border( offsetParent ); - - // Safari <= 2 doubles body offsets with an absolutely positioned element or parent - if ( safari2 && !absolute && jQuery.css(offsetParent, "position") == "absolute" ) - absolute = true; - - // Get next offsetParent - offsetParent = offsetParent.offsetParent; - } - - // Get parent scroll offsets - while ( parent.tagName && /^body|html$/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 ( document.documentElement["getBoundingClientRect"] ) + jQuery.fn.offset = function() { + if ( !this[0] ) return { top: 0, left: 0 }; + if ( this[0] === this[0].ownerDocument.body ) return jQuery.offset.bodyOffset( this[0] ); + var box = this[0].getBoundingClientRect(), doc = this[0].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.boxModel && docElem.scrollTop || body.scrollTop ) - clientTop, + left = box.left + (self.pageXOffset || jQuery.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft; + return { top: top, left: left }; + }; +else + jQuery.fn.offset = function() { + if ( !this[0] ) return { top: 0, left: 0 }; + if ( this[0] === this[0].ownerDocument.body ) return jQuery.offset.bodyOffset( this[0] ); + jQuery.offset.initialized || jQuery.offset.initialize(); + + var elem = this[0], offsetParent = elem.offsetParent, prevOffsetParent = elem, + doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement, + body = doc.body, defaultView = doc.defaultView, + prevComputedStyle = defaultView.getComputedStyle(elem, null), + top = elem.offsetTop, left = elem.offsetLeft; + + while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) { + computedStyle = defaultView.getComputedStyle(elem, null); + top -= elem.scrollTop, left -= elem.scrollLeft; + if ( elem === offsetParent ) { + top += elem.offsetTop, left += elem.offsetLeft; + if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.tagName)) ) + top += parseInt( computedStyle.borderTopWidth, 10) || 0, + left += parseInt( computedStyle.borderLeftWidth, 10) || 0; + prevOffsetParent = offsetParent, offsetParent = elem.offsetParent; } - - // Safari doubles body offsets with an absolutely positioned element or parent - if ( safari && absolute ) - add( -doc.body.offsetLeft, -doc.body.offsetTop ); + if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) + top += parseInt( computedStyle.borderTopWidth, 10) || 0, + left += parseInt( computedStyle.borderLeftWidth, 10) || 0; + 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 ( 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 }; + }; - function add(l, t) { - left += parseInt(l) || 0; - top += parseInt(t) || 0; +jQuery.offset = { + initialize: function() { + if ( this.initialized ) return; + var body = document.body, container = document.createElement('div'), innerDiv, checkDiv, table, td, rules, prop, bodyMarginTop = body.style.marginTop, + html = '
'; + + rules = { position: 'absolute', top: 0, left: 0, margin: 0, border: 0, width: '1px', height: '1px', visibility: 'hidden' }; + for ( prop in rules ) container.style[prop] = rules[prop]; + + 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); + + innerDiv.style.overflow = 'hidden', innerDiv.style.position = 'relative'; + this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5); + + body.style.marginTop = '1px'; + this.doesNotIncludeMarginInBodyOffset = (body.offsetTop === 0); + body.style.marginTop = bodyMarginTop; + + body.removeChild(container); + this.initialized = true; + }, + + bodyOffset: function(body) { + jQuery.offset.initialized || jQuery.offset.initialize(); + var top = body.offsetTop, left = body.offsetLeft; + if ( jQuery.offset.doesNotIncludeMarginInBodyOffset ) + top += parseInt( jQuery.curCSS(body, 'marginTop', true), 10 ) || 0, + left += parseInt( jQuery.curCSS(body, 'marginLeft', true), 10 ) || 0; + return { top: top, left: left }; } }; + + +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$/i.test(offsetParent[0].tagName) ? { top: 0, left: 0 } : offsetParent.offset(); + + // Subtract element margins + // note: when an element has margin: auto the offsetLeft and marginLeft + // are the same in Safari causing offset.left to incorrectly be 0 + offset.top -= num( this, 'marginTop' ); + offset.left -= num( this, 'marginLeft' ); + + // Add offsetParent borders + parentOffset.top += num( offsetParent, 'borderTopWidth' ); + parentOffset.left += num( offsetParent, 'borderLeftWidth' ); + + // Subtract the two offsets + results = { + top: offset.top - parentOffset.top, + left: offset.left - parentOffset.left + }; + } + + return results; + }, + + offsetParent: function() { + var offsetParent = this[0].offsetParent || document.body; + while ( offsetParent && (!/^body|html$/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 null; + + 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 ]; + }; +});