12 "./selector" // contains
13 ], function( jQuery, strundefined, access, rnumnonpx, curCSS, addGetHookIf, support ) {
15 var docElem = window.document.documentElement;
18 * Gets a window from an element
20 function getWindow( elem ) {
21 return jQuery.isWindow( elem ) ? elem : elem.nodeType === 9 && elem.defaultView;
25 setOffset: function( elem, options, i ) {
26 var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
27 position = jQuery.css( elem, "position" ),
28 curElem = jQuery( elem ),
31 // Set position first, in-case top/left are set even on static elem
32 if ( position === "static" ) {
33 elem.style.position = "relative";
36 curOffset = curElem.offset();
37 curCSSTop = jQuery.css( elem, "top" );
38 curCSSLeft = jQuery.css( elem, "left" );
39 calculatePosition = ( position === "absolute" || position === "fixed" ) &&
40 ( curCSSTop + curCSSLeft ).indexOf("auto") > -1;
42 // Need to be able to calculate position if either
43 // top or left is auto and position is either absolute or fixed
44 if ( calculatePosition ) {
45 curPosition = curElem.position();
46 curTop = curPosition.top;
47 curLeft = curPosition.left;
50 curTop = parseFloat( curCSSTop ) || 0;
51 curLeft = parseFloat( curCSSLeft ) || 0;
54 if ( jQuery.isFunction( options ) ) {
55 options = options.call( elem, i, curOffset );
58 if ( options.top != null ) {
59 props.top = ( options.top - curOffset.top ) + curTop;
61 if ( options.left != null ) {
62 props.left = ( options.left - curOffset.left ) + curLeft;
65 if ( "using" in options ) {
66 options.using.call( elem, props );
75 offset: function( options ) {
76 if ( arguments.length ) {
77 return options === undefined ?
79 this.each(function( i ) {
80 jQuery.offset.setOffset( this, options, i );
86 box = { top: 0, left: 0 },
87 doc = elem && elem.ownerDocument;
93 docElem = doc.documentElement;
95 // Make sure it's not a disconnected DOM node
96 if ( !jQuery.contains( docElem, elem ) ) {
100 // Support: BlackBerry 5, iOS 3 (original iPhone)
101 // If we don't have gBCR, just use 0,0 rather than error
102 if ( typeof elem.getBoundingClientRect !== strundefined ) {
103 box = elem.getBoundingClientRect();
105 win = getWindow( doc );
107 top: box.top + win.pageYOffset - docElem.clientTop,
108 left: box.left + win.pageXOffset - docElem.clientLeft
112 position: function() {
117 var offsetParent, offset,
119 parentOffset = { top: 0, left: 0 };
121 // Fixed elements are offset from window (parentOffset = {top:0, left: 0}, because it is its only offset parent
122 if ( jQuery.css( elem, "position" ) === "fixed" ) {
123 // Assume getBoundingClientRect is there when computed position is fixed
124 offset = elem.getBoundingClientRect();
127 // Get *real* offsetParent
128 offsetParent = this.offsetParent();
130 // Get correct offsets
131 offset = this.offset();
132 if ( !jQuery.nodeName( offsetParent[ 0 ], "html" ) ) {
133 parentOffset = offsetParent.offset();
136 // Add offsetParent borders
137 parentOffset.top += jQuery.css( offsetParent[ 0 ], "borderTopWidth", true );
138 parentOffset.left += jQuery.css( offsetParent[ 0 ], "borderLeftWidth", true );
141 // Subtract parent offsets and element margins
143 top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
144 left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
148 offsetParent: function() {
149 return this.map(function() {
150 var offsetParent = this.offsetParent || docElem;
152 while ( offsetParent && ( !jQuery.nodeName( offsetParent, "html" ) && jQuery.css( offsetParent, "position" ) === "static" ) ) {
153 offsetParent = offsetParent.offsetParent;
156 return offsetParent || docElem;
161 // Create scrollLeft and scrollTop methods
162 jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
163 var top = "pageYOffset" === prop;
165 jQuery.fn[ method ] = function( val ) {
166 return access( this, function( elem, method, val ) {
167 var win = getWindow( elem );
169 if ( val === undefined ) {
170 return win ? win[ prop ] : elem[ method ];
175 !top ? val : window.pageXOffset,
176 top ? val : window.pageYOffset
180 elem[ method ] = val;
182 }, method, val, arguments.length, null );
186 // Support: Safari<7+, Chrome<37+
187 // Add the top/left cssHooks using jQuery.fn.position
188 // Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
189 // Blink bug: https://code.google.com/p/chromium/issues/detail?id=229280
190 // getComputedStyle returns percent when specified for top/left/bottom/right;
191 // rather than make the css module depend on the offset module, just check for it here
192 jQuery.each( [ "top", "left" ], function( i, prop ) {
193 jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
194 function( elem, computed ) {
196 computed = curCSS( elem, prop );
197 // If curCSS returns percentage, fallback to offset
198 return rnumnonpx.test( computed ) ?
199 jQuery( elem ).position()[ prop ] + "px" :