deac/jquery
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Made a number of stylistic changes to the offset code (braces, declarations, etc.).

Browse source
This commit is contained in:
John Resig 2009-07-19 12:53:39 +00:00
parent 9d46c0ebb4
commit f0681d98fe
1 changed files with 61 additions and 30 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

91
src/offset.js
View file

@ -1,19 +1,25 @@
if ( "getBoundingClientRect" in document.documentElement ) if ( "getBoundingClientRect" in document.documentElement ) {
jQuery.fn.offset = function() { jQuery.fn.offset = function() {
var elem = this[0]; var elem = this[0];
if ( !elem || !elem.ownerDocument ) return null; if ( !elem || !elem.ownerDocument ) { return null; }
if ( elem === elem.ownerDocument.body ) return jQuery.offset.bodyOffset( elem ); if ( elem === elem.ownerDocument.body ) {
return jQuery.offset.bodyOffset( elem );
}
var box = elem.getBoundingClientRect(), doc = elem.ownerDocument, body = doc.body, docElem = doc.documentElement, 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, clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0,
top = box.top + (self.pageYOffset || jQuery.support.boxModel && docElem.scrollTop || body.scrollTop ) - clientTop, top = box.top + (self.pageYOffset || jQuery.support.boxModel && docElem.scrollTop || body.scrollTop ) - clientTop,
left = box.left + (self.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft; left = box.left + (self.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft;
return { top: top, left: left }; return { top: top, left: left };
}; };
else } else {
jQuery.fn.offset = function() { jQuery.fn.offset = function() {
var elem = this[0]; var elem = this[0];
if ( !elem || !elem.ownerDocument ) return null; if ( !elem || !elem.ownerDocument ) { return null; }
if ( elem === elem.ownerDocument.body ) return jQuery.offset.bodyOffset( elem ); if ( elem === elem.ownerDocument.body ) {
return jQuery.offset.bodyOffset( elem );
}
jQuery.offset.initialize(); jQuery.offset.initialize();
var offsetParent = elem.offsetParent, prevOffsetParent = elem, var offsetParent = elem.offsetParent, prevOffsetParent = elem,
@ -23,32 +29,45 @@ else
top = elem.offsetTop, left = elem.offsetLeft; top = elem.offsetTop, left = elem.offsetLeft;
while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) { while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) break; if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) { break; }
computedStyle = defaultView.getComputedStyle(elem, null); computedStyle = defaultView.getComputedStyle(elem, null);
top -= elem.scrollTop, left -= elem.scrollLeft; top -= elem.scrollTop;
left -= elem.scrollLeft;
if ( elem === offsetParent ) { if ( elem === offsetParent ) {
top += elem.offsetTop, left += elem.offsetLeft; top += elem.offsetTop;
if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.tagName)) ) left += elem.offsetLeft;
top += parseFloat( computedStyle.borderTopWidth ) || 0,
if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.tagName)) ) {
top += parseFloat( computedStyle.borderTopWidth ) || 0;
left += parseFloat( computedStyle.borderLeftWidth ) || 0; left += parseFloat( computedStyle.borderLeftWidth ) || 0;
}
prevOffsetParent = offsetParent, offsetParent = elem.offsetParent; prevOffsetParent = offsetParent, offsetParent = elem.offsetParent;
} }
if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" )
top += parseFloat( computedStyle.borderTopWidth ) || 0, if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) {
top += parseFloat( computedStyle.borderTopWidth ) || 0;
left += parseFloat( computedStyle.borderLeftWidth ) || 0; left += parseFloat( computedStyle.borderLeftWidth ) || 0;
}
prevComputedStyle = computedStyle; prevComputedStyle = computedStyle;
} }
if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) {
top += body.offsetTop, top += body.offsetTop;
left += body.offsetLeft; left += body.offsetLeft;
}
if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) {
top += Math.max( docElem.scrollTop, body.scrollTop ), top += Math.max( docElem.scrollTop, body.scrollTop );
left += Math.max( docElem.scrollLeft, body.scrollLeft ); left += Math.max( docElem.scrollLeft, body.scrollLeft );
}
return { top: top, left: left }; return { top: top, left: left };
}; };
}
jQuery.offset = { jQuery.offset = {
initialize: function() { initialize: function() {
@ -59,14 +78,17 @@ jQuery.offset = {
container.innerHTML = html; container.innerHTML = html;
body.insertBefore( container, body.firstChild ); body.insertBefore( container, body.firstChild );
innerDiv = container.firstChild, checkDiv = innerDiv.firstChild, td = innerDiv.nextSibling.firstChild.firstChild; innerDiv = container.firstChild;
checkDiv = innerDiv.firstChild;
td = innerDiv.nextSibling.firstChild.firstChild;
this.doesNotAddBorder = (checkDiv.offsetTop !== 5); this.doesNotAddBorder = (checkDiv.offsetTop !== 5);
this.doesAddBorderForTableAndCells = (td.offsetTop === 5); this.doesAddBorderForTableAndCells = (td.offsetTop === 5);
checkDiv.style.position = 'fixed', checkDiv.style.top = '20px'; checkDiv.style.position = 'fixed', checkDiv.style.top = '20px';
this.supportsFixedPosition = (checkDiv.offsetTop === 20 || checkDiv.offsetTop === 15); // safari subtracts parent border width here which is 5px // safari subtracts parent border width here which is 5px
checkDiv.style.position = '', checkDiv.style.top = ''; this.supportsFixedPosition = (checkDiv.offsetTop === 20 || checkDiv.offsetTop === 15);
checkDiv.style.position = checkDiv.style.top = '';
innerDiv.style.overflow = 'hidden', innerDiv.style.position = 'relative'; innerDiv.style.overflow = 'hidden', innerDiv.style.position = 'relative';
this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5); this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
@ -80,11 +102,15 @@ jQuery.offset = {
}, },
bodyOffset: function(body) { bodyOffset: function(body) {
jQuery.offset.initialize();
var top = body.offsetTop, left = body.offsetLeft; var top = body.offsetTop, left = body.offsetLeft;
if ( jQuery.offset.doesNotIncludeMarginInBodyOffset )
top += parseFloat( jQuery.curCSS(body, 'marginTop', true) ) || 0, jQuery.offset.initialize();
if ( jQuery.offset.doesNotIncludeMarginInBodyOffset ) {
top += parseFloat( jQuery.curCSS(body, 'marginTop', true) ) || 0;
left += parseFloat( jQuery.curCSS(body, 'marginLeft', true) ) || 0; left += parseFloat( jQuery.curCSS(body, 'marginLeft', true) ) || 0;
}
return { top: top, left: left }; return { top: top, left: left };
} }
}; };
@ -92,7 +118,7 @@ jQuery.offset = {
jQuery.fn.extend({ jQuery.fn.extend({
position: function() { position: function() {
if ( !this[0] ) return null; if ( !this[0] ) { return null; }
var elem = this[0], var elem = this[0],
@ -122,8 +148,9 @@ jQuery.fn.extend({
offsetParent: function() { offsetParent: function() {
var offsetParent = this[0].offsetParent || document.body; var offsetParent = this[0].offsetParent || document.body;
while ( offsetParent && (!/^body|html$/i.test(offsetParent.tagName) && jQuery.css(offsetParent, 'position') === 'static') ) while ( offsetParent && (!/^body|html$/i.test(offsetParent.tagName) && jQuery.css(offsetParent, 'position') === 'static') ) {
offsetParent = offsetParent.offsetParent; offsetParent = offsetParent.offsetParent;
}
return jQuery( offsetParent ); return jQuery( offsetParent );
} }
}); });
@ -134,19 +161,21 @@ jQuery.each( ['Left', 'Top'], function(i, name) {
var method = 'scroll' + name; var method = 'scroll' + name;
jQuery.fn[ method ] = function(val) { jQuery.fn[ method ] = function(val) {
if ( !this[0] ) return null; if ( !this[0] ) { return null; }
if ( val !== undefined ) { if ( val !== undefined ) {
// Set the scroll offset // Set the scroll offset
return this.each(function() { return this.each(function() {
win = getWindow( this ); win = getWindow( this );
win ? if ( win ) {
win.scrollTo( win.scrollTo(
!i ? val : jQuery(win).scrollLeft(), !i ? val : jQuery(win).scrollLeft(),
i ? val : jQuery(win).scrollTop() i ? val : jQuery(win).scrollTop()
) : );
} else {
this[ method ] = val; this[ method ] = val;
}
}); });
} else { } else {
var elem = this[0], var elem = this[0],
@ -162,8 +191,10 @@ jQuery.each( ['Left', 'Top'], function(i, name) {
}; };
function getWindow( elem ) { function getWindow( elem ) {
return ("scrollTo" in elem && elem.document) ? elem : return ("scrollTo" in elem && elem.document) ?
(elem.nodeName === "#document") ? elem.defaultView || elem.parentWindow : elem :
elem.nodeType === 9 ?
elem.defaultView || elem.parentWindow :
false; false;
} }
}); });