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- if ( "getBoundingClientRect" in document.documentElement )
- jQuery.fn.offset = function() {
- var elem = this[0];
- if ( !elem ) return null;
- if ( elem === elem.ownerDocument.body ) return jQuery.offset.bodyOffset( elem );
- var box = elem.getBoundingClientRect(), doc = elem.ownerDocument, body = doc.body, docElem = doc.documentElement,
- clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0,
- top = box.top + (self.pageYOffset || jQuery.boxModel && docElem.scrollTop || body.scrollTop ) - clientTop,
- left = box.left + (self.pageXOffset || jQuery.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft;
- return { top: top, left: left };
- };
- else
- jQuery.fn.offset = function() {
- var elem = this[0];
- if ( !elem ) return null;
- if ( elem === elem.ownerDocument.body ) return jQuery.offset.bodyOffset( elem );
- jQuery.offset.initialize();
- var offsetParent = elem.offsetParent, prevOffsetParent = elem,
- doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement,
- body = doc.body, defaultView = doc.defaultView,
- prevComputedStyle = defaultView.getComputedStyle(elem, null),
- top = elem.offsetTop, left = elem.offsetLeft;
- while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
- if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) break;
- computedStyle = defaultView.getComputedStyle(elem, null);
- top -= elem.scrollTop, left -= elem.scrollLeft;
- if ( elem === offsetParent ) {
- top += elem.offsetTop, left += elem.offsetLeft;
- if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.tagName)) )
- top += parseFloat( computedStyle.borderTopWidth, 10) || 0,
- left += parseFloat( computedStyle.borderLeftWidth, 10) || 0;
- prevOffsetParent = offsetParent, offsetParent = elem.offsetParent;
- }
- if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" )
- top += parseFloat( computedStyle.borderTopWidth, 10) || 0,
- left += parseFloat( computedStyle.borderLeftWidth, 10) || 0;
- prevComputedStyle = computedStyle;
- }
- if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" )
- top += body.offsetTop,
- left += body.offsetLeft;
- if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" )
- top += Math.max(docElem.scrollTop, body.scrollTop),
- left += Math.max(docElem.scrollLeft, body.scrollLeft);
- return { top: top, left: left };
- };
- jQuery.offset = {
- initialize: function() {
- var body = document.body, container = document.createElement('div'), innerDiv, checkDiv, table, td, prop, bodyMarginTop = body.style.marginTop,
- 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>';
- jQuery.extend( container.style, { position: 'absolute', top: 0, left: 0, margin: 0, border: 0, width: '1px', height: '1px', visibility: 'hidden' } );
- container.innerHTML = html;
- body.insertBefore(container, body.firstChild);
- innerDiv = container.firstChild, checkDiv = innerDiv.firstChild, td = innerDiv.nextSibling.firstChild.firstChild;
- this.doesNotAddBorder = (checkDiv.offsetTop !== 5);
- this.doesAddBorderForTableAndCells = (td.offsetTop === 5);
- checkDiv.style.position = 'fixed', checkDiv.style.top = '20px';
- this.supportsFixedPosition = (checkDiv.offsetTop >= 15); // safari subtracts parent border width here which is 5px
- checkDiv.style.position = '', checkDiv.style.top = '';
- innerDiv.style.overflow = 'hidden', innerDiv.style.position = 'relative';
- this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
- body.style.marginTop = '1px';
- this.doesNotIncludeMarginInBodyOffset = (body.offsetTop === 0);
- body.style.marginTop = bodyMarginTop;
- body.removeChild(container);
- jQuery.offset.initialize = function(){};
- },
- bodyOffset: function(body) {
- jQuery.offset.initialize();
- var top = body.offsetTop, left = body.offsetLeft;
- if ( jQuery.offset.doesNotIncludeMarginInBodyOffset )
- top += parseFloat( jQuery.curCSS(body, 'marginTop', true), 10 ) || 0,
- left += parseFloat( jQuery.curCSS(body, 'marginLeft', true), 10 ) || 0;
- return { top: top, left: left };
- }
- };
- jQuery.fn.extend({
- position: function() {
- if ( !this[0] ) return null;
- var elem = this[0], left = 0, top = 0, results,
- // Get *real* offsetParent
- offsetParent = this.offsetParent(),
- // Get correct offsets
- offset = this.offset(),
- parentOffset = /^body|html$/i.test(offsetParent[0].tagName) ? { top: 0, left: 0 } : offsetParent.offset();
- // Subtract element margins
- // note: when an element has margin: auto the offsetLeft and marginLeft
- // are the same in Safari causing offset.left to incorrectly be 0
- offset.top -= parseFloat( jQuery.curCSS(elem, 'marginTop', true), 10 ) || 0;
- offset.left -= parseFloat( jQuery.curCSS(elem, 'marginLeft', true), 10 ) || 0;
- // Add offsetParent borders
- parentOffset.top += parseFloat( jQuery.curCSS(offsetParent[0], 'borderTopWidth', true), 10 ) || 0;
- parentOffset.left += parseFloat( jQuery.curCSS(offsetParent[0], 'borderLeftWidth', true), 10 ) || 0;
- // Subtract the two offsets
- results = {
- top: offset.top - parentOffset.top,
- left: offset.left - parentOffset.left
- };
- return results;
- },
- offsetParent: function() {
- var offsetParent = this[0].offsetParent || document.body;
- while ( offsetParent && (!/^body|html$/i.test(offsetParent.tagName) && jQuery.css(offsetParent, 'position') == 'static') )
- offsetParent = offsetParent.offsetParent;
- return jQuery(offsetParent);
- }
- });
- // Create scrollLeft and scrollTop methods
- jQuery.each( ['Left', 'Top'], function(i, name) {
- var method = 'scroll' + name;
- jQuery.fn[ method ] = function(val) {
- if ( !this[0] ) return null;
- return val !== undefined ?
- // Set the scroll offset
- this.each(function() {
- this == window || this == document ?
- window.scrollTo(
- !i ? val : jQuery(window).scrollLeft(),
- i ? val : jQuery(window).scrollTop()
- ) :
- this[ method ] = val;
- }) :
- // Return the scroll offset
- this[0] == window || this[0] == document ?
- self[ i ? 'pageYOffset' : 'pageXOffset' ] ||
- jQuery.boxModel && document.documentElement[ method ] ||
- document.body[ method ] :
- this[0][ method ];
- };
- });
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