1 import jQuery from "./core.js";
2 import access from "./core/access.js";
3 import documentElement from "./var/documentElement.js";
4 import isWindow from "./var/isWindow.js";
6 import "./core/init.js";
8 import "./selector.js"; // contains
11 setOffset: function( elem, options, i ) {
12 var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
13 position = jQuery.css( elem, "position" ),
14 curElem = jQuery( elem ),
17 // Set position first, in-case top/left are set even on static elem
18 if ( position === "static" ) {
19 elem.style.position = "relative";
22 curOffset = curElem.offset();
23 curCSSTop = jQuery.css( elem, "top" );
24 curCSSLeft = jQuery.css( elem, "left" );
25 calculatePosition = ( position === "absolute" || position === "fixed" ) &&
26 ( curCSSTop + curCSSLeft ).indexOf( "auto" ) > -1;
28 // Need to be able to calculate position if either
29 // top or left is auto and position is either absolute or fixed
30 if ( calculatePosition ) {
31 curPosition = curElem.position();
32 curTop = curPosition.top;
33 curLeft = curPosition.left;
36 curTop = parseFloat( curCSSTop ) || 0;
37 curLeft = parseFloat( curCSSLeft ) || 0;
40 if ( typeof options === "function" ) {
42 // Use jQuery.extend here to allow modification of coordinates argument (gh-1848)
43 options = options.call( elem, i, jQuery.extend( {}, curOffset ) );
46 if ( options.top != null ) {
47 props.top = ( options.top - curOffset.top ) + curTop;
49 if ( options.left != null ) {
50 props.left = ( options.left - curOffset.left ) + curLeft;
53 if ( "using" in options ) {
54 options.using.call( elem, props );
64 // offset() relates an element's border box to the document origin
65 offset: function( options ) {
67 // Preserve chaining for setter
68 if ( arguments.length ) {
69 return options === undefined ?
71 this.each( function( i ) {
72 jQuery.offset.setOffset( this, options, i );
83 // Return zeros for disconnected and hidden (display: none) elements (gh-2310)
85 // Running getBoundingClientRect on a
86 // disconnected node in IE throws an error
87 if ( !elem.getClientRects().length ) {
88 return { top: 0, left: 0 };
91 // Get document-relative position by adding viewport scroll to viewport-relative gBCR
92 rect = elem.getBoundingClientRect();
93 win = elem.ownerDocument.defaultView;
95 top: rect.top + win.pageYOffset,
96 left: rect.left + win.pageXOffset
100 // position() relates an element's margin box to its offset parent's padding box
101 // This corresponds to the behavior of CSS absolute positioning
102 position: function() {
107 var offsetParent, offset, doc,
109 parentOffset = { top: 0, left: 0 };
111 // position:fixed elements are offset from the viewport, which itself always has zero offset
112 if ( jQuery.css( elem, "position" ) === "fixed" ) {
114 // Assume position:fixed implies availability of getBoundingClientRect
115 offset = elem.getBoundingClientRect();
118 offset = this.offset();
120 // Account for the *real* offset parent, which can be the document or its root element
121 // when a statically positioned element is identified
122 doc = elem.ownerDocument;
123 offsetParent = elem.offsetParent || doc.documentElement;
124 while ( offsetParent &&
125 ( offsetParent === doc.body || offsetParent === doc.documentElement ) &&
126 jQuery.css( offsetParent, "position" ) === "static" ) {
128 offsetParent = offsetParent.parentNode;
130 if ( offsetParent && offsetParent !== elem && offsetParent.nodeType === 1 ) {
132 // Incorporate borders into its offset, since they are outside its content origin
133 parentOffset = jQuery( offsetParent ).offset();
134 parentOffset.top += jQuery.css( offsetParent, "borderTopWidth", true );
135 parentOffset.left += jQuery.css( offsetParent, "borderLeftWidth", true );
139 // Subtract parent offsets and element margins
141 top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
142 left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
146 // This method will return documentElement in the following cases:
147 // 1) For the element inside the iframe without offsetParent, this method will return
148 // documentElement of the parent window
149 // 2) For the hidden or detached element
150 // 3) For body or html element, i.e. in case of the html node - it will return itself
152 // but those exceptions were never presented as a real life use-cases
153 // and might be considered as more preferable results.
155 // This logic, however, is not guaranteed and can change at any point in the future
156 offsetParent: function() {
157 return this.map( function() {
158 var offsetParent = this.offsetParent;
160 while ( offsetParent && jQuery.css( offsetParent, "position" ) === "static" ) {
161 offsetParent = offsetParent.offsetParent;
164 return offsetParent || documentElement;
169 // Create scrollLeft and scrollTop methods
170 jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
171 var top = "pageYOffset" === prop;
173 jQuery.fn[ method ] = function( val ) {
174 return access( this, function( elem, method, val ) {
176 // Coalesce documents and windows
178 if ( isWindow( elem ) ) {
180 } else if ( elem.nodeType === 9 ) {
181 win = elem.defaultView;
184 if ( val === undefined ) {
185 return win ? win[ prop ] : elem[ method ];
190 !top ? val : win.pageXOffset,
191 top ? val : win.pageYOffset
195 elem[ method ] = val;
197 }, method, val, arguments.length );
201 export default jQuery;