X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=69258390061382b6dbce78c0f8c701c1cea7b664;hb=61e37d41490aed319a176c6ca7feb95e5505059c;hp=a06c36c3835871bf48b18e3031171f3eebe3de24;hpb=595d1253653c618a8a112ec09777c294125195d9;p=jquery.git
diff --git a/src/offset.js b/src/offset.js
index a06c36c..6925839 100644
--- a/src/offset.js
+++ b/src/offset.js
@@ -1,114 +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,
- offsetParent = elem.offsetParent,
- doc = elem.ownerDocument,
- safari2 = safari && parseInt(version) < 522,
- position = jQuery.css(elem, "position"),
- absolute = position == "absolute",
- fixed = 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 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 );
+if ( "getBoundingClientRect" in document.documentElement ) {
+ 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 );
+ }
+
+ 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;
+
+ 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;
+ }
+
+ 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.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;
}
+
+ 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.curCSS(body, 'marginTop', true) ) || 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 = function() {};
+ },
+
+ bodyOffset: function( body ) {
+ var top = body.offsetTop, left = body.offsetLeft;
+
+ jQuery.offset.initialize();
+
+ if ( jQuery.offset.doesNotIncludeMarginInBodyOffset ) {
+ top += parseFloat( jQuery.curCSS(body, 'marginTop', true) ) || 0;
+ left += parseFloat( jQuery.curCSS(body, 'marginLeft', true) ) || 0;
+ }
+
+ return { top: top, left: left };
+ },
- // Otherwise loop through the offsetParents and parentNodes
- } else {
-
- // Initial element offsets
- add( elem.offsetLeft, elem.offsetTop );
+ setOffset: function( elem, options ) {
+ // set position first, in-case top/left are set even on static elem
+ if ( /static/.test( jQuery.curCSS( elem, 'position' ) ) ) {
+ elem.style.position = 'relative';
+ }
+ var curElem = jQuery( elem ),
+ curOffset = curElem.offset(),
+ curTop = parseInt( jQuery.curCSS( elem, 'top', true ), 10 ) || 0,
+ curLeft = parseInt( jQuery.curCSS( elem, 'left', true ), 10) || 0,
+ props = {
+ top: (options.top - curOffset.top) + curTop,
+ left: (options.left - curOffset.left) + curLeft
+ };
- // 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 );
-
- // Get offsetParent's position
- position = jQuery.css(offsetParent, "position");
-
- // Safari <= 2 doubles body offsets with an absolutely positioned element or parent
- if ( safari2 && !absolute && position == "absolute" )
- absolute = true;
-
- // Opera adds border for fixed, relative and absolute parent elements
- if (opera && /^fixed|relative|absolute$/i.test(position))
- add(
- -parseInt(jQuery.css(elem, "borderLeftWidth")),
- -parseInt(jQuery.css(elem, "borderTopWidth"))
- );
-
- // Add the document scroll offsets if position is fixed
- if ( !fixed && position == "fixed" )
- fixed = true;
-
- // Get next offsetParent
+ if ( 'using' in options ) {
+ options.using.call( elem, props );
+ } else {
+ curElem.css( props );
+ }
+ }
+};
+
+
+jQuery.fn.extend({
+ position: function() {
+ if ( !this[0] ) {
+ return null;
+ }
+
+ var elem = this[0],
+
+ // Get *real* offsetParent
+ offsetParent = this.offsetParent(),
+
+ // Get correct offsets
+ offset = this.offset(),
+ parentOffset = /^body|html$/i.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.curCSS(elem, 'marginTop', true) ) || 0;
+ offset.left -= parseFloat( jQuery.curCSS(elem, 'marginLeft', true) ) || 0;
+
+ // Add offsetParent borders
+ parentOffset.top += parseFloat( jQuery.curCSS(offsetParent[0], 'borderTopWidth', true) ) || 0;
+ parentOffset.left += parseFloat( jQuery.curCSS(offsetParent[0], 'borderLeftWidth', true) ) || 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 && (!/^body|html$/i.test(offsetParent.nodeName) && jQuery.css(offsetParent, 'position') === 'static') ) {
offsetParent = offsetParent.offsetParent;
}
+ return offsetParent;
+ });
+ }
+});
+
+
+// Create scrollLeft and scrollTop methods
+jQuery.each( ["Left", "Top"], function( i, name ) {
+ var method = "scroll" + name;
+
+ jQuery.fn[ method ] = function(val) {
+ var elem = this[0], win;
- // Get parent scroll offsets
- while ( parent.tagName && !/^body|html$/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;
- }
-
- // Safari <= 2 doubles body offsets with an absolute or fixed positioned element or parent
- if ( safari2 && (absolute || fixed) )
- 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)
- );
+ if ( !elem ) {
+ return null;
}
- // Return an object with top and left properties
- results = { top: top, left: left };
- }
+ if ( val !== undefined ) {
+ // Set the scroll offset
+ return this.each(function() {
+ win = getWindow( this );
- return results;
+ if ( win ) {
+ win.scrollTo(
+ !i ? val : jQuery(win).scrollLeft(),
+ i ? val : jQuery(win).scrollTop()
+ );
- function border(elem) {
- add( jQuery.css(elem, "borderLeftWidth"), jQuery.css(elem, "borderTopWidth") );
- }
+ } else {
+ this[ method ] = val;
+ }
+ });
+ } else {
+ win = getWindow( elem );
- function add(l, t) {
- left += parseInt(l) || 0;
- top += parseInt(t) || 0;
- }
-};
+ // 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 ("scrollTo" in elem && elem.document) ?
+ elem :
+ elem.nodeType === 9 ?
+ elem.defaultView || elem.parentWindow :
+ false;
+}