X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=c27dc5a8dcbce3c7bf2bca2e8e89b845566a7109;hb=3d8ceaf2f21f4782ff21746887e2bcf56025e704;hp=b77a0cdb5349967ed210bd0a4f36a7b9deeba888;hpb=de6520b50e481ba588e9021abcab16d06ea61141;p=jquery.git
diff --git a/src/offset.js b/src/offset.js
index b77a0cd..c27dc5a 100644
--- a/src/offset.js
+++ b/src/offset.js
@@ -1,139 +1,159 @@
-// 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),
- css = jQuery.curCSS,
- fixed = 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 {
+if ( "getBoundingClientRect" in document.documentElement ) {
+ jQuery.fn.offset = function() {
+ var elem = this[0];
+ if ( !elem || !elem.ownerDocument ) { return null; }
+ if ( elem === elem.ownerDocument.body ) {
+ return jQuery.offset.bodyOffset( elem );
+ }
- // Initial element offsets
- add( elem.offsetLeft, elem.offsetTop );
+ 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() {
+ var elem = this[0];
+ if ( !elem || !elem.ownerDocument ) { return null; }
+ if ( elem === elem.ownerDocument.body ) {
+ return jQuery.offset.bodyOffset( elem );
+ }
- // Get parent offsets
- while ( offsetParent ) {
- // Add offsetParent offsets
- add( offsetParent.offsetLeft, offsetParent.offsetTop );
+ jQuery.offset.initialize();
- // 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)$/i.test(offsetParent.tagName) || safari && !safari2 )
- border( offsetParent );
+ var offsetParent = elem.offsetParent, prevOffsetParent = elem,
+ doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement,
+ body = doc.body, defaultView = doc.defaultView,
+ prevComputedStyle = defaultView.getComputedStyle(elem, null),
+ top = elem.offsetTop, left = elem.offsetLeft;
- // Add the document scroll offsets if position is fixed on any offsetParent
- if ( !fixed && css(offsetParent, "position") == "fixed" )
- fixed = true;
+ while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
+ if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) { break; }
- // Set offsetChild to previous offsetParent unless it is the body element
- offsetChild = /^body$/i.test(offsetParent.tagName) ? offsetChild : offsetParent;
- // Get next offsetParent
- offsetParent = offsetParent.offsetParent;
- }
+ computedStyle = defaultView.getComputedStyle(elem, null);
+ top -= elem.scrollTop;
+ left -= elem.scrollLeft;
- // 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(css(parent, "display")) )
- // Subtract parent scroll offsets
- add( -parent.scrollLeft, -parent.scrollTop );
+ if ( elem === offsetParent ) {
+ top += elem.offsetTop;
+ left += elem.offsetLeft;
- // Mozilla does not add the border for a parent that has overflow != visible
- if ( mozilla && css(parent, "overflow") != "visible" )
- border( parent );
+ 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;
+ }
- // Get next parent
- parent = parent.parentNode;
+ prevOffsetParent = offsetParent, offsetParent = elem.offsetParent;
}
- // 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 || css(offsetChild, "position") == "absolute")) ||
- (mozilla && css(offsetChild, "position") != "absolute") )
- add( -doc.body.offsetLeft, -doc.body.offsetTop );
+ if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) {
+ top += parseFloat( computedStyle.borderTopWidth ) || 0;
+ left += parseFloat( computedStyle.borderLeftWidth ) || 0;
+ }
- // 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));
+ 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;
+ }
- function border(elem) {
- add( jQuery.curCSS(elem, "borderLeftWidth", true), jQuery.curCSS(elem, "borderTopWidth", true) );
- }
+ if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) {
+ top += Math.max( docElem.scrollTop, body.scrollTop );
+ left += Math.max( docElem.scrollLeft, body.scrollLeft );
+ }
- function add(l, t) {
- left += parseInt(l, 10) || 0;
- top += parseInt(t, 10) || 0;
- }
+ 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 = '';
- return results;
+ innerDiv.style.overflow = 'hidden', innerDiv.style.position = 'relative';
+ this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
+
+ this.doesNotIncludeMarginInBodyOffset = (body.offsetTop !== bodyMarginTop);
+
+ body.removeChild( container );
+ jQuery.offset.initialize = function(){};
+
+ body = container = innerDiv = checkDiv = table = td = null;
+ },
+
+ 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 };
+ }
};
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
- offset.top -= parseInt( jQuery.curCSS( this[0], 'marginTop', true ), 10 ) || 0;
- offset.left -= parseInt( jQuery.curCSS( this[0], 'marginLeft', true ), 10 ) || 0;
+ // Get correct offsets
+ offset = this.offset(),
+ parentOffset = /^body|html$/i.test(offsetParent[0].nodeName) ? { top: 0, left: 0 } : offsetParent.offset();
- // Add offsetParent borders
- parentOffset.top += parseInt( jQuery.curCSS( offsetParent[0], 'borderTopWidth', true ), 10 ) || 0;
- parentOffset.left += parseInt( jQuery.curCSS( offsetParent[0], 'borderLeftWidth', true ), 10 ) || 0;
+ // Subtract element margins
+ // note: when an element has margin: auto the offsetLeft and marginLeft
+ // are the same in Safari causing offset.left to incorrectly be 0
+ offset.top -= parseFloat( jQuery.curCSS(elem, 'marginTop', true) ) || 0;
+ offset.left -= parseFloat( jQuery.curCSS(elem, 'marginLeft', true) ) || 0;
- // Subtract the two offsets
- results = {
- top: offset.top - parentOffset.top,
- left: offset.left - parentOffset.left
- };
- }
+ // Add offsetParent borders
+ parentOffset.top += parseFloat( jQuery.curCSS(offsetParent[0], 'borderTopWidth', true) ) || 0;
+ parentOffset.left += parseFloat( jQuery.curCSS(offsetParent[0], 'borderLeftWidth', true) ) || 0;
- return results;
+ // Subtract the two offsets
+ return {
+ top: offset.top - parentOffset.top,
+ left: offset.left - parentOffset.left
+ };
},
offsetParent: function() {
- var offsetParent = this[0].offsetParent;
- while ( offsetParent && (!/^body|html$/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 && (!/^body|html$/i.test(offsetParent.nodeName) && jQuery.css(offsetParent, 'position') === 'static') ) {
+ offsetParent = offsetParent.offsetParent;
+ }
+ return offsetParent;
+ });
}
});
@@ -141,27 +161,40 @@ jQuery.fn.extend({
// 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;
- return val != undefined ?
+ jQuery.fn[ method ] = function(val) {
+ var elem = this[0], win;
+
+ 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 );
+
+ win ?
+ win.scrollTo(
+ !i ? val : jQuery(win).scrollLeft(),
+ i ? val : jQuery(win).scrollTop()
) :
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 ("scrollTo" in elem && elem.document) ?
+ elem :
+ elem.nodeType === 9 ?
+ elem.defaultView || elem.parentWindow :
+ false;
+}