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 var position = jQuery.curCSS( elem, "position" );
155 // set position first, in-case top/left are set even on static elem
156 if ( position === "static" ) {
157 elem.style.position = "relative";
160 var curElem = jQuery( elem ),
161 curOffset = curElem.offset(),
162 curCSSTop = jQuery.curCSS( elem, "top", true ),
163 curCSSLeft = jQuery.curCSS( elem, "left", true ),
164 calculatePosition = (position === "absolute" && jQuery.inArray('auto', [curCSSTop, curCSSLeft]) > -1),
165 props = {}, curPosition = {}, curTop, curLeft;
167 // need to be able to calculate position if either top or left is auto and position is absolute
168 if ( calculatePosition ) {
169 curPosition = curElem.position();
172 curTop = calculatePosition ? curPosition.top : parseInt( curCSSTop, 10 ) || 0;
173 curLeft = calculatePosition ? curPosition.left : parseInt( curCSSLeft, 10 ) || 0;
175 if ( jQuery.isFunction( options ) ) {
176 options = options.call( elem, i, curOffset );
179 if (options.top != null) {
180 props.top = (options.top - curOffset.top) + curTop;
182 if (options.left != null) {
183 props.left = (options.left - curOffset.left) + curLeft;
186 if ( "using" in options ) {
187 options.using.call( elem, props );
189 curElem.css( props );
196 position: function() {
203 // Get *real* offsetParent
204 offsetParent = this.offsetParent(),
206 // Get correct offsets
207 offset = this.offset(),
208 parentOffset = /^body|html$/i.test(offsetParent[0].nodeName) ? { top: 0, left: 0 } : offsetParent.offset();
210 // Subtract element margins
211 // note: when an element has margin: auto the offsetLeft and marginLeft
212 // are the same in Safari causing offset.left to incorrectly be 0
213 offset.top -= parseFloat( jQuery.curCSS(elem, "marginTop", true) ) || 0;
214 offset.left -= parseFloat( jQuery.curCSS(elem, "marginLeft", true) ) || 0;
216 // Add offsetParent borders
217 parentOffset.top += parseFloat( jQuery.curCSS(offsetParent[0], "borderTopWidth", true) ) || 0;
218 parentOffset.left += parseFloat( jQuery.curCSS(offsetParent[0], "borderLeftWidth", true) ) || 0;
220 // Subtract the two offsets
222 top: offset.top - parentOffset.top,
223 left: offset.left - parentOffset.left
227 offsetParent: function() {
228 return this.map(function() {
229 var offsetParent = this.offsetParent || document.body;
230 while ( offsetParent && (!/^body|html$/i.test(offsetParent.nodeName) && jQuery.css(offsetParent, "position") === "static") ) {
231 offsetParent = offsetParent.offsetParent;
239 // Create scrollLeft and scrollTop methods
240 jQuery.each( ["Left", "Top"], function( i, name ) {
241 var method = "scroll" + name;
243 jQuery.fn[ method ] = function(val) {
244 var elem = this[0], win;
250 if ( val !== undefined ) {
251 // Set the scroll offset
252 return this.each(function() {
253 win = getWindow( this );
257 !i ? val : jQuery(win).scrollLeft(),
258 i ? val : jQuery(win).scrollTop()
262 this[ method ] = val;
266 win = getWindow( elem );
268 // Return the scroll offset
269 return win ? ("pageXOffset" in win) ? win[ i ? "pageYOffset" : "pageXOffset" ] :
270 jQuery.support.boxModel && win.document.documentElement[ method ] ||
271 win.document.body[ method ] :
277 function getWindow( elem ) {
278 return ("scrollTo" in elem && elem.document) ?
280 elem.nodeType === 9 ?
281 elem.defaultView || elem.parentWindow :