using part of gentelella
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frankknoll
218
docs/gentelella/vendors/jquery/src/offset.js
vendored
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218
docs/gentelella/vendors/jquery/src/offset.js
vendored
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define( [
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"./core",
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"./core/access",
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"./var/document",
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"./var/documentElement",
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"./css/var/rnumnonpx",
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"./css/curCSS",
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"./css/addGetHookIf",
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"./css/support",
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"./core/init",
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"./css",
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"./selector" // contains
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], function( jQuery, access, document, documentElement, rnumnonpx, curCSS, addGetHookIf, support ) {
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/**
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* Gets a window from an element
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*/
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function getWindow( elem ) {
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return jQuery.isWindow( elem ) ? elem : elem.nodeType === 9 && elem.defaultView;
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}
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jQuery.offset = {
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setOffset: function( elem, options, i ) {
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var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
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position = jQuery.css( elem, "position" ),
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curElem = jQuery( elem ),
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props = {};
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// Set position first, in-case top/left are set even on static elem
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if ( position === "static" ) {
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elem.style.position = "relative";
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}
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curOffset = curElem.offset();
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curCSSTop = jQuery.css( elem, "top" );
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curCSSLeft = jQuery.css( elem, "left" );
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calculatePosition = ( position === "absolute" || position === "fixed" ) &&
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( curCSSTop + curCSSLeft ).indexOf( "auto" ) > -1;
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// Need to be able to calculate position if either
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// top or left is auto and position is either absolute or fixed
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if ( calculatePosition ) {
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curPosition = curElem.position();
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curTop = curPosition.top;
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curLeft = curPosition.left;
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} else {
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curTop = parseFloat( curCSSTop ) || 0;
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curLeft = parseFloat( curCSSLeft ) || 0;
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}
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if ( jQuery.isFunction( options ) ) {
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// Use jQuery.extend here to allow modification of coordinates argument (gh-1848)
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options = options.call( elem, i, jQuery.extend( {}, curOffset ) );
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}
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if ( options.top != null ) {
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props.top = ( options.top - curOffset.top ) + curTop;
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}
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if ( options.left != null ) {
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props.left = ( options.left - curOffset.left ) + curLeft;
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}
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if ( "using" in options ) {
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options.using.call( elem, props );
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} else {
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curElem.css( props );
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}
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}
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};
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jQuery.fn.extend( {
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offset: function( options ) {
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if ( arguments.length ) {
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return options === undefined ?
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this :
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this.each( function( i ) {
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jQuery.offset.setOffset( this, options, i );
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} );
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}
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var docElem, win,
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elem = this[ 0 ],
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box = { top: 0, left: 0 },
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doc = elem && elem.ownerDocument;
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if ( !doc ) {
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return;
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}
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docElem = doc.documentElement;
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// Make sure it's not a disconnected DOM node
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if ( !jQuery.contains( docElem, elem ) ) {
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return box;
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}
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box = elem.getBoundingClientRect();
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win = getWindow( doc );
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return {
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top: box.top + win.pageYOffset - docElem.clientTop,
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left: box.left + win.pageXOffset - docElem.clientLeft
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};
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},
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position: function() {
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if ( !this[ 0 ] ) {
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return;
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}
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var offsetParent, offset,
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elem = this[ 0 ],
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parentOffset = { top: 0, left: 0 };
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// Fixed elements are offset from window (parentOffset = {top:0, left: 0},
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// because it is its only offset parent
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if ( jQuery.css( elem, "position" ) === "fixed" ) {
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// Assume getBoundingClientRect is there when computed position is fixed
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offset = elem.getBoundingClientRect();
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} else {
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// Get *real* offsetParent
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offsetParent = this.offsetParent();
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// Get correct offsets
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offset = this.offset();
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if ( !jQuery.nodeName( offsetParent[ 0 ], "html" ) ) {
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parentOffset = offsetParent.offset();
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}
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// Add offsetParent borders
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parentOffset.top += jQuery.css( offsetParent[ 0 ], "borderTopWidth", true );
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parentOffset.left += jQuery.css( offsetParent[ 0 ], "borderLeftWidth", true );
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}
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// Subtract parent offsets and element margins
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return {
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top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
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left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
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};
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},
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// This method will return documentElement in the following cases:
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// 1) For the element inside the iframe without offsetParent, this method will return
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// documentElement of the parent window
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// 2) For the hidden or detached element
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// 3) For body or html element, i.e. in case of the html node - it will return itself
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//
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// but those exceptions were never presented as a real life use-cases
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// and might be considered as more preferable results.
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//
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// This logic, however, is not guaranteed and can change at any point in the future
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offsetParent: function() {
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return this.map( function() {
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var offsetParent = this.offsetParent;
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while ( offsetParent && jQuery.css( offsetParent, "position" ) === "static" ) {
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offsetParent = offsetParent.offsetParent;
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}
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return offsetParent || documentElement;
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} );
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}
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} );
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// Create scrollLeft and scrollTop methods
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jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
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var top = "pageYOffset" === prop;
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jQuery.fn[ method ] = function( val ) {
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return access( this, function( elem, method, val ) {
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var win = getWindow( elem );
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if ( val === undefined ) {
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return win ? win[ prop ] : elem[ method ];
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}
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if ( win ) {
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win.scrollTo(
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!top ? val : win.pageXOffset,
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top ? val : win.pageYOffset
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);
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} else {
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elem[ method ] = val;
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}
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}, method, val, arguments.length );
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};
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} );
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// Support: Safari<7-8+, Chrome<37-44+
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// Add the top/left cssHooks using jQuery.fn.position
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// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
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// Blink bug: https://code.google.com/p/chromium/issues/detail?id=229280
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// getComputedStyle returns percent when specified for top/left/bottom/right;
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// rather than make the css module depend on the offset module, just check for it here
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jQuery.each( [ "top", "left" ], function( i, prop ) {
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jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
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function( elem, computed ) {
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if ( computed ) {
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computed = curCSS( elem, prop );
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// If curCSS returns percentage, fallback to offset
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return rnumnonpx.test( computed ) ?
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jQuery( elem ).position()[ prop ] + "px" :
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computed;
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}
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}
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);
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} );
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return jQuery;
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} );
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