X-Git-Url: http://git.asbjorn.biz/?p=jquery.git;a=blobdiff_plain;f=src%2Foffset.js;h=2040c9d83ac9d5db4f15159cc980fbab5c2506fd;hp=30dedbc844b6aa74ff07b25c1f2eb2650b78084b;hb=1d1d4fe112c49cbd704d880b27cc646f2bfe1737;hpb=ab551c2b14ac6b0511cf3da10ca224ce461a0f10 diff --git a/src/offset.js b/src/offset.js index 30dedbc..2040c9d 100644 --- a/src/offset.js +++ b/src/offset.js @@ -1,155 +1,305 @@ -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; +(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() { - 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; + +} 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 ) { - computedStyle = defaultView.getComputedStyle(elem, null); - top -= elem.scrollTop, left -= elem.scrollLeft; + 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 && /^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; + 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; + } + + if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) { + top += parseFloat( computedStyle.borderTopWidth ) || 0; + left += parseFloat( computedStyle.borderLeftWidth ) || 0; } - if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) - top += parseInt( computedStyle.borderTopWidth, 10) || 0, - left += parseInt( computedStyle.borderLeftWidth, 10) || 0; + prevComputedStyle = computedStyle; } - if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) - top += body.offsetTop, + if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) { + top += body.offsetTop; left += body.offsetLeft; + } - if ( prevComputedStyle.position === "fixed" ) - top += Math.max(docElem.scrollTop, body.scrollTop), - left += Math.max(docElem.scrollLeft, body.scrollLeft); + 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() { - if ( this.initialized ) return; - var body = document.body, container = document.createElement('div'), innerDiv, checkDiv, table, rules, prop, bodyMarginTop = body.style.marginTop, - html = '
'; + var body = document.body, container = document.createElement("div"), innerDiv, checkDiv, table, td, bodyMarginTop = parseFloat( jQuery.css(body, "marginTop") ) || 0, + 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]; + 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; + 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'; + 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); - body.style.marginTop = '1px'; - this.doesNotIncludeMarginInBodyOffset = (body.offsetTop === 0); - body.style.marginTop = bodyMarginTop; + this.doesNotIncludeMarginInBodyOffset = (body.offsetTop !== bodyMarginTop); - body.removeChild(container); - this.initialized = true; + body.removeChild( container ); + body = container = innerDiv = checkDiv = table = td = null; + jQuery.offset.initialize = jQuery.noop; }, - 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; + 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() { - var left = 0, top = 0, results; + if ( !this[0] ) { + return null; + } - if ( this[0] ) { - // Get *real* offsetParent - var offsetParent = this.offsetParent(), + var elem = this[0], - // Get correct offsets - offset = this.offset(), - parentOffset = /^body|html$/i.test(offsetParent[0].tagName) ? { top: 0, left: 0 } : offsetParent.offset(); + // Get *real* offsetParent + offsetParent = this.offsetParent(), - // 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' ); + // Get correct offsets + offset = this.offset(), + parentOffset = rroot.test(offsetParent[0].nodeName) ? { top: 0, left: 0 } : offsetParent.offset(); - // Add offsetParent borders - parentOffset.top += num( offsetParent, 'borderTopWidth' ); - parentOffset.left += num( offsetParent, 'borderLeftWidth' ); + // 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; - // Subtract the two offsets - results = { - top: offset.top - parentOffset.top, - left: offset.left - parentOffset.left - }; - } + // Add offsetParent borders + parentOffset.top += parseFloat( jQuery.css(offsetParent[0], "borderTopWidth") ) || 0; + parentOffset.left += parseFloat( jQuery.css(offsetParent[0], "borderLeftWidth") ) || 0; - return results; + // Subtract the two offsets + return { + top: offset.top - parentOffset.top, + left: offset.left - parentOffset.left + }; }, 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); + 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.each( ["Left", "Top"], function( i, name ) { + var method = "scroll" + name; + jQuery.fn[ method ] = function(val) { - if (!this[0]) return; + var elem = this[0], win; - return val !== undefined ? + if ( !elem ) { + return null; + } + if ( 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() - ) : + 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 - this[0] == window || this[0] == document ? - self[ i ? 'pageYOffset' : 'pageXOffset' ] || - jQuery.boxModel && document.documentElement[ method ] || - document.body[ method ] : - this[0][ method ]; + 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 );