1 if ( "getBoundingClientRect" in document.documentElement ) {
2 jQuery.fn.offset = function( options ) {
6 return this.each(function( i ) {
7 jQuery.offset.setOffset( this, options, i );
11 if ( !elem || !elem.ownerDocument ) {
15 if ( elem === elem.ownerDocument.body ) {
16 return jQuery.offset.bodyOffset( elem );
19 var box = elem.getBoundingClientRect(),
20 doc = elem.ownerDocument,
22 docElem = doc.documentElement,
24 clientTop = docElem.clientTop || body.clientTop || 0,
25 clientLeft = docElem.clientLeft || body.clientLeft || 0,
26 scrollTop = (win.pageYOffset || jQuery.support.boxModel && docElem.scrollTop || body.scrollTop ),
27 scrollLeft = (win.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft),
28 top = box.top + scrollTop - clientTop,
29 left = box.left + scrollLeft - clientLeft;
31 return { top: top, left: left };
35 jQuery.fn.offset = function( options ) {
39 return this.each(function( i ) {
40 jQuery.offset.setOffset( this, options, i );
44 if ( !elem || !elem.ownerDocument ) {
48 if ( elem === elem.ownerDocument.body ) {
49 return jQuery.offset.bodyOffset( elem );
52 jQuery.offset.initialize();
54 var offsetParent = elem.offsetParent, prevOffsetParent = elem,
55 doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement,
56 body = doc.body, defaultView = doc.defaultView,
57 prevComputedStyle = defaultView ? defaultView.getComputedStyle( elem, null ) : elem.currentStyle,
58 top = elem.offsetTop, left = elem.offsetLeft;
60 while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
61 if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) {
65 computedStyle = defaultView ? defaultView.getComputedStyle(elem, null) : elem.currentStyle;
66 top -= elem.scrollTop;
67 left -= elem.scrollLeft;
69 if ( elem === offsetParent ) {
70 top += elem.offsetTop;
71 left += elem.offsetLeft;
73 if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.nodeName)) ) {
74 top += parseFloat( computedStyle.borderTopWidth ) || 0;
75 left += parseFloat( computedStyle.borderLeftWidth ) || 0;
78 prevOffsetParent = offsetParent;
79 offsetParent = elem.offsetParent;
82 if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) {
83 top += parseFloat( computedStyle.borderTopWidth ) || 0;
84 left += parseFloat( computedStyle.borderLeftWidth ) || 0;
87 prevComputedStyle = computedStyle;
90 if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) {
91 top += body.offsetTop;
92 left += body.offsetLeft;
95 if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) {
96 top += Math.max( docElem.scrollTop, body.scrollTop );
97 left += Math.max( docElem.scrollLeft, body.scrollLeft );
100 return { top: top, left: left };
105 initialize: function() {
106 var body = document.body, container = document.createElement("div"), innerDiv, checkDiv, table, td, bodyMarginTop = parseFloat( jQuery.curCSS(body, "marginTop", true) ) || 0,
107 html = "<div style='position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;'><div></div></div><table style='position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;' cellpadding='0' cellspacing='0'><tr><td></td></tr></table>";
109 jQuery.extend( container.style, { position: "absolute", top: 0, left: 0, margin: 0, border: 0, width: "1px", height: "1px", visibility: "hidden" } );
111 container.innerHTML = html;
112 body.insertBefore( container, body.firstChild );
113 innerDiv = container.firstChild;
114 checkDiv = innerDiv.firstChild;
115 td = innerDiv.nextSibling.firstChild.firstChild;
117 this.doesNotAddBorder = (checkDiv.offsetTop !== 5);
118 this.doesAddBorderForTableAndCells = (td.offsetTop === 5);
120 checkDiv.style.position = "fixed";
121 checkDiv.style.top = "20px";
123 // safari subtracts parent border width here which is 5px
124 this.supportsFixedPosition = (checkDiv.offsetTop === 20 || checkDiv.offsetTop === 15);
125 checkDiv.style.position = checkDiv.style.top = "";
127 innerDiv.style.overflow = "hidden";
128 innerDiv.style.position = "relative";
130 this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
132 this.doesNotIncludeMarginInBodyOffset = (body.offsetTop !== bodyMarginTop);
134 body.removeChild( container );
135 body = container = innerDiv = checkDiv = table = td = null;
136 jQuery.offset.initialize = jQuery.noop;
139 bodyOffset: function( body ) {
140 var top = body.offsetTop, left = body.offsetLeft;
142 jQuery.offset.initialize();
144 if ( jQuery.offset.doesNotIncludeMarginInBodyOffset ) {
145 top += parseFloat( jQuery.curCSS(body, "marginTop", true) ) || 0;
146 left += parseFloat( jQuery.curCSS(body, "marginLeft", true) ) || 0;
149 return { top: top, left: left };
152 setOffset: function( elem, options, i ) {
153 // set position first, in-case top/left are set even on static elem
154 if ( /static/.test( jQuery.curCSS( elem, "position" ) ) ) {
155 elem.style.position = "relative";
157 var curElem = jQuery( elem ),
158 curOffset = curElem.offset(),
159 curTop = parseInt( jQuery.curCSS( elem, "top", true ), 10 ) || 0,
160 curLeft = parseInt( jQuery.curCSS( elem, "left", true ), 10 ) || 0;
162 if ( jQuery.isFunction( options ) ) {
163 options = options.call( elem, i, curOffset );
167 top: (options.top - curOffset.top) + curTop,
168 left: (options.left - curOffset.left) + curLeft
171 if ( "using" in options ) {
172 options.using.call( elem, props );
174 curElem.css( props );
181 position: function() {
188 // Get *real* offsetParent
189 offsetParent = this.offsetParent(),
191 // Get correct offsets
192 offset = this.offset(),
193 parentOffset = /^body|html$/i.test(offsetParent[0].nodeName) ? { top: 0, left: 0 } : offsetParent.offset();
195 // Subtract element margins
196 // note: when an element has margin: auto the offsetLeft and marginLeft
197 // are the same in Safari causing offset.left to incorrectly be 0
198 offset.top -= parseFloat( jQuery.curCSS(elem, "marginTop", true) ) || 0;
199 offset.left -= parseFloat( jQuery.curCSS(elem, "marginLeft", true) ) || 0;
201 // Add offsetParent borders
202 parentOffset.top += parseFloat( jQuery.curCSS(offsetParent[0], "borderTopWidth", true) ) || 0;
203 parentOffset.left += parseFloat( jQuery.curCSS(offsetParent[0], "borderLeftWidth", true) ) || 0;
205 // Subtract the two offsets
207 top: offset.top - parentOffset.top,
208 left: offset.left - parentOffset.left
212 offsetParent: function() {
213 return this.map(function() {
214 var offsetParent = this.offsetParent || document.body;
215 while ( offsetParent && (!/^body|html$/i.test(offsetParent.nodeName) && jQuery.css(offsetParent, "position") === "static") ) {
216 offsetParent = offsetParent.offsetParent;
224 // Create scrollLeft and scrollTop methods
225 jQuery.each( ["Left", "Top"], function( i, name ) {
226 var method = "scroll" + name;
228 jQuery.fn[ method ] = function(val) {
229 var elem = this[0], win;
235 if ( val !== undefined ) {
236 // Set the scroll offset
237 return this.each(function() {
238 win = getWindow( this );
242 !i ? val : jQuery(win).scrollLeft(),
243 i ? val : jQuery(win).scrollTop()
247 this[ method ] = val;
251 win = getWindow( elem );
253 // Return the scroll offset
254 return win ? ("pageXOffset" in win) ? win[ i ? "pageYOffset" : "pageXOffset" ] :
255 jQuery.support.boxModel && win.document.documentElement[ method ] ||
256 win.document.body[ method ] :
262 function getWindow( elem ) {
263 return ("scrollTo" in elem && elem.document) ?
265 elem.nodeType === 9 ?
266 elem.defaultView || elem.parentWindow :