mirror of
https://github.com/jquery/jquery.git
synced 2024-11-23 02:54:22 +00:00
300 lines
8.8 KiB
JavaScript
300 lines
8.8 KiB
JavaScript
(function( jQuery ) {
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var rtable = /^t(?:able|d|h)$/i,
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rroot = /^(?:body|html)$/i;
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if ( "getBoundingClientRect" in document.documentElement ) {
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jQuery.fn.offset = function( options ) {
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var elem = this[0], box;
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if ( options ) {
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return 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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if ( !elem || !elem.ownerDocument ) {
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return null;
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}
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if ( elem === elem.ownerDocument.body ) {
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return jQuery.offset.bodyOffset( elem );
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}
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try {
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box = elem.getBoundingClientRect();
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} catch(e) {}
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var doc = elem.ownerDocument,
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docElem = doc.documentElement;
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// Make sure we're not dealing with a disconnected DOM node
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if ( !box || !jQuery.contains( docElem, elem ) ) {
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return box || { top: 0, left: 0 };
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}
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var body = doc.body,
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win = getWindow(doc),
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clientTop = docElem.clientTop || body.clientTop || 0,
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clientLeft = docElem.clientLeft || body.clientLeft || 0,
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scrollTop = (win.pageYOffset || jQuery.support.boxModel && docElem.scrollTop || body.scrollTop ),
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scrollLeft = (win.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft),
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top = box.top + scrollTop - clientTop,
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left = box.left + scrollLeft - clientLeft;
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return { top: top, left: left };
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};
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} else {
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jQuery.fn.offset = function( options ) {
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var elem = this[0];
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if ( options ) {
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return 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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if ( !elem || !elem.ownerDocument ) {
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return null;
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}
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if ( elem === elem.ownerDocument.body ) {
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return jQuery.offset.bodyOffset( elem );
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}
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jQuery.offset.initialize();
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var offsetParent = elem.offsetParent, prevOffsetParent = elem,
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doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement,
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body = doc.body, defaultView = doc.defaultView,
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prevComputedStyle = defaultView ? defaultView.getComputedStyle( elem, null ) : elem.currentStyle,
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top = elem.offsetTop, left = elem.offsetLeft;
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while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
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if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) {
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break;
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}
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computedStyle = defaultView ? defaultView.getComputedStyle(elem, null) : elem.currentStyle;
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top -= elem.scrollTop;
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left -= elem.scrollLeft;
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if ( elem === offsetParent ) {
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top += elem.offsetTop;
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left += elem.offsetLeft;
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if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && rtable.test(elem.nodeName)) ) {
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top += parseFloat( computedStyle.borderTopWidth ) || 0;
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left += parseFloat( computedStyle.borderLeftWidth ) || 0;
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}
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prevOffsetParent = offsetParent;
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offsetParent = elem.offsetParent;
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}
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if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) {
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top += parseFloat( computedStyle.borderTopWidth ) || 0;
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left += parseFloat( computedStyle.borderLeftWidth ) || 0;
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}
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prevComputedStyle = computedStyle;
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}
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if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) {
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top += body.offsetTop;
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left += body.offsetLeft;
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}
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if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) {
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top += Math.max( docElem.scrollTop, body.scrollTop );
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left += Math.max( docElem.scrollLeft, body.scrollLeft );
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}
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return { top: top, left: left };
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};
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}
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jQuery.offset = {
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initialize: function() {
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var body = document.body, container = document.createElement("div"), innerDiv, checkDiv, table, td, bodyMarginTop = parseFloat( jQuery.css(body, "marginTop") ) || 0,
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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>";
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jQuery.extend( container.style, { position: "absolute", top: 0, left: 0, margin: 0, border: 0, width: "1px", height: "1px", visibility: "hidden" } );
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container.innerHTML = html;
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body.insertBefore( container, body.firstChild );
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innerDiv = container.firstChild;
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checkDiv = innerDiv.firstChild;
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td = innerDiv.nextSibling.firstChild.firstChild;
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this.doesNotAddBorder = (checkDiv.offsetTop !== 5);
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this.doesAddBorderForTableAndCells = (td.offsetTop === 5);
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checkDiv.style.position = "fixed";
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checkDiv.style.top = "20px";
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// safari subtracts parent border width here which is 5px
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this.supportsFixedPosition = (checkDiv.offsetTop === 20 || checkDiv.offsetTop === 15);
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checkDiv.style.position = checkDiv.style.top = "";
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innerDiv.style.overflow = "hidden";
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innerDiv.style.position = "relative";
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this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
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this.doesNotIncludeMarginInBodyOffset = (body.offsetTop !== bodyMarginTop);
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body.removeChild( container );
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body = container = innerDiv = checkDiv = table = td = null;
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jQuery.offset.initialize = jQuery.noop;
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},
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bodyOffset: function( body ) {
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var top = body.offsetTop, left = body.offsetLeft;
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jQuery.offset.initialize();
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if ( jQuery.offset.doesNotIncludeMarginInBodyOffset ) {
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top += parseFloat( jQuery.css(body, "marginTop") ) || 0;
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left += parseFloat( jQuery.css(body, "marginLeft") ) || 0;
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}
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return { top: top, left: left };
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},
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setOffset: function( elem, options, i ) {
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var position = jQuery.css( elem, "position" );
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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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var curElem = jQuery( elem ),
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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" && jQuery.inArray('auto', [curCSSTop, curCSSLeft]) > -1),
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props = {}, curPosition = {}, curTop, curLeft;
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// need to be able to calculate position if either top or left is auto and position is absolute
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if ( calculatePosition ) {
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curPosition = curElem.position();
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}
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curTop = calculatePosition ? curPosition.top : parseInt( curCSSTop, 10 ) || 0;
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curLeft = calculatePosition ? curPosition.left : parseInt( curCSSLeft, 10 ) || 0;
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if ( jQuery.isFunction( options ) ) {
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options = options.call( elem, i, 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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position: function() {
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if ( !this[0] ) {
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return null;
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}
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var elem = this[0],
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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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parentOffset = rroot.test(offsetParent[0].nodeName) ? { top: 0, left: 0 } : offsetParent.offset();
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// Subtract element margins
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// note: when an element has margin: auto the offsetLeft and marginLeft
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// are the same in Safari causing offset.left to incorrectly be 0
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offset.top -= parseFloat( jQuery.css(elem, "marginTop") ) || 0;
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offset.left -= parseFloat( jQuery.css(elem, "marginLeft") ) || 0;
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// Add offsetParent borders
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parentOffset.top += parseFloat( jQuery.css(offsetParent[0], "borderTopWidth") ) || 0;
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parentOffset.left += parseFloat( jQuery.css(offsetParent[0], "borderLeftWidth") ) || 0;
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// Subtract the two offsets
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return {
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top: offset.top - parentOffset.top,
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left: offset.left - parentOffset.left
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};
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},
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offsetParent: function() {
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return this.map(function() {
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var offsetParent = this.offsetParent || document.body;
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while ( offsetParent && (!rroot.test(offsetParent.nodeName) && jQuery.css(offsetParent, "position") === "static") ) {
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offsetParent = offsetParent.offsetParent;
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}
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return offsetParent;
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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( ["Left", "Top"], function( i, name ) {
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var method = "scroll" + name;
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jQuery.fn[ method ] = function(val) {
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var elem = this[0], win;
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if ( !elem ) {
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return null;
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}
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if ( val !== undefined ) {
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// Set the scroll offset
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return this.each(function() {
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win = getWindow( this );
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if ( win ) {
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win.scrollTo(
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!i ? val : jQuery(win).scrollLeft(),
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i ? val : jQuery(win).scrollTop()
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);
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} else {
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this[ method ] = val;
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}
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});
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} else {
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win = getWindow( elem );
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// Return the scroll offset
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return win ? ("pageXOffset" in win) ? win[ i ? "pageYOffset" : "pageXOffset" ] :
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jQuery.support.boxModel && win.document.documentElement[ method ] ||
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win.document.body[ method ] :
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elem[ method ];
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}
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};
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});
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function getWindow( elem ) {
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return jQuery.isWindow( elem ) ?
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elem :
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elem.nodeType === 9 ?
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elem.defaultView || elem.parentWindow :
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false;
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}
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})( jQuery );
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