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jquery.dimensions.js
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jquery.dimensions.js
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/* Copyright (c) 2007 Paul Bakaus (paul.bakaus@googlemail.com) and Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
*
* $LastChangedDate: 2007-08-17 13:14:11 -0500 (Fri, 17 Aug 2007) $
* $Rev: 2759 $
*
* Version: 1.1.2
*
* Requires: jQuery 1.1.3+
*/
(function($){
// store a copy of the core height and width methods
var height = $.fn.height,
width = $.fn.width;
$.fn.extend({
/**
* If used on document, returns the document's height (innerHeight).
* If used on window, returns the viewport's (window) height.
* See core docs on height() to see what happens when used on an element.
*
* @example $("#testdiv").height()
* @result 200
*
* @example $(document).height()
* @result 800
*
* @example $(window).height()
* @result 400
*
* @name height
* @type Number
* @cat Plugins/Dimensions
*/
height: function() {
if ( !this[0] ) error();
if ( this[0] == window )
if ( $.browser.opera || ($.browser.safari && parseInt($.browser.version) > 520) )
return self.innerHeight - (($(document).height() > self.innerHeight) ? getScrollbarWidth() : 0);
else if ( $.browser.safari )
return self.innerHeight;
else
return $.boxModel && document.documentElement.clientHeight || document.body.clientHeight;
if ( this[0] == document )
return Math.max( ($.boxModel && document.documentElement.scrollHeight || document.body.scrollHeight), document.body.offsetHeight );
return height.apply(this, arguments);
},
/**
* If used on document, returns the document's width (innerWidth).
* If used on window, returns the viewport's (window) width.
* See core docs on width() to see what happens when used on an element.
*
* @example $("#testdiv").width()
* @result 200
*
* @example $(document).width()
* @result 800
*
* @example $(window).width()
* @result 400
*
* @name width
* @type Number
* @cat Plugins/Dimensions
*/
width: function() {
if (!this[0]) error();
if ( this[0] == window )
if ( $.browser.opera || ($.browser.safari && parseInt($.browser.version) > 520) )
return self.innerWidth - (($(document).width() > self.innerWidth) ? getScrollbarWidth() : 0);
else if ( $.browser.safari )
return self.innerWidth;
else
return $.boxModel && document.documentElement.clientWidth || document.body.clientWidth;
if ( this[0] == document )
if ($.browser.mozilla) {
// mozilla reports scrollWidth and offsetWidth as the same
var scrollLeft = self.pageXOffset;
self.scrollTo(99999999, self.pageYOffset);
var scrollWidth = self.pageXOffset;
self.scrollTo(scrollLeft, self.pageYOffset);
return document.body.offsetWidth + scrollWidth;
}
else
return Math.max( (($.boxModel && !$.browser.safari) && document.documentElement.scrollWidth || document.body.scrollWidth), document.body.offsetWidth );
return width.apply(this, arguments);
},
/**
* Gets the inner height (excludes the border and includes the padding) for the first matched element.
* If used on document, returns the document's height (innerHeight).
* If used on window, returns the viewport's (window) height.
*
* @example $("#testdiv").innerHeight()
* @result 210
*
* @name innerHeight
* @type Number
* @cat Plugins/Dimensions
*/
innerHeight: function() {
if (!this[0]) error();
return this[0] == window || this[0] == document ?
this.height() :
this.is(':visible') ?
this[0].offsetHeight - num(this, 'borderTopWidth') - num(this, 'borderBottomWidth') :
this.height() + num(this, 'paddingTop') + num(this, 'paddingBottom');
},
/**
* Gets the inner width (excludes the border and includes the padding) for the first matched element.
* If used on document, returns the document's width (innerWidth).
* If used on window, returns the viewport's (window) width.
*
* @example $("#testdiv").innerWidth()
* @result 210
*
* @name innerWidth
* @type Number
* @cat Plugins/Dimensions
*/
innerWidth: function() {
if (!this[0]) error();
return this[0] == window || this[0] == document ?
this.width() :
this.is(':visible') ?
this[0].offsetWidth - num(this, 'borderLeftWidth') - num(this, 'borderRightWidth') :
this.width() + num(this, 'paddingLeft') + num(this, 'paddingRight');
},
/**
* Gets the outer height (includes the border and padding) for the first matched element.
* If used on document, returns the document's height (innerHeight).
* If used on window, returns the viewport's (window) height.
*
* The margin can be included in the calculation by passing an options map with margin
* set to true.
*
* @example $("#testdiv").outerHeight()
* @result 220
*
* @example $("#testdiv").outerHeight({ margin: true })
* @result 240
*
* @name outerHeight
* @type Number
* @param Map options Optional settings to configure the way the outer height is calculated.
* @cat Plugins/Dimensions
*/
outerHeight: function(options) {
if (!this[0]) error();
options = $.extend({ margin: false }, options || {});
return this[0] == window || this[0] == document ?
this.height() :
this.is(':visible') ?
this[0].offsetHeight + (options.margin ? (num(this, 'marginTop') + num(this, 'marginBottom')) : 0) :
this.height()
+ num(this,'borderTopWidth') + num(this, 'borderBottomWidth')
+ num(this, 'paddingTop') + num(this, 'paddingBottom')
+ (options.margin ? (num(this, 'marginTop') + num(this, 'marginBottom')) : 0);
},
/**
* Gets the outer width (including the border and padding) for the first matched element.
* If used on document, returns the document's width (innerWidth).
* If used on window, returns the viewport's (window) width.
*
* The margin can be included in the calculation by passing an options map with margin
* set to true.
*
* @example $("#testdiv").outerWidth()
* @result 1000
*
* @example $("#testdiv").outerWidth({ margin: true })
* @result 1020
*
* @name outerHeight
* @type Number
* @param Map options Optional settings to configure the way the outer width is calculated.
* @cat Plugins/Dimensions
*/
outerWidth: function(options) {
if (!this[0]) error();
options = $.extend({ margin: false }, options || {});
return this[0] == window || this[0] == document ?
this.width() :
this.is(':visible') ?
this[0].offsetWidth + (options.margin ? (num(this, 'marginLeft') + num(this, 'marginRight')) : 0) :
this.width()
+ num(this, 'borderLeftWidth') + num(this, 'borderRightWidth')
+ num(this, 'paddingLeft') + num(this, 'paddingRight')
+ (options.margin ? (num(this, 'marginLeft') + num(this, 'marginRight')) : 0);
},
/**
* Gets how many pixels the user has scrolled to the right (scrollLeft).
* Works on containers with overflow: auto and window/document.
*
* @example $(window).scrollLeft()
* @result 100
*
* @example $(document).scrollLeft()
* @result 100
*
* @example $("#testdiv").scrollLeft()
* @result 100
*
* @name scrollLeft
* @type Number
* @cat Plugins/Dimensions
*/
/**
* Sets the scrollLeft property for each element and continues the chain.
* Works on containers with overflow: auto and window/document.
*
* @example $(window).scrollLeft(100).scrollLeft()
* @result 100
*
* @example $(document).scrollLeft(100).scrollLeft()
* @result 100
*
* @example $("#testdiv").scrollLeft(100).scrollLeft()
* @result 100
*
* @name scrollLeft
* @param Number value A positive number representing the desired scrollLeft.
* @type jQuery
* @cat Plugins/Dimensions
*/
scrollLeft: function(val) {
if (!this[0]) error();
if ( val != undefined )
// set the scroll left
return this.each(function() {
if (this == window || this == document)
window.scrollTo( val, $(window).scrollTop() );
else
this.scrollLeft = val;
});
// return the scroll left offest in pixels
if ( this[0] == window || this[0] == document )
return self.pageXOffset ||
$.boxModel && document.documentElement.scrollLeft ||
document.body.scrollLeft;
return this[0].scrollLeft;
},
/**
* Gets how many pixels the user has scrolled to the bottom (scrollTop).
* Works on containers with overflow: auto and window/document.
*
* @example $(window).scrollTop()
* @result 100
*
* @example $(document).scrollTop()
* @result 100
*
* @example $("#testdiv").scrollTop()
* @result 100
*
* @name scrollTop
* @type Number
* @cat Plugins/Dimensions
*/
/**
* Sets the scrollTop property for each element and continues the chain.
* Works on containers with overflow: auto and window/document.
*
* @example $(window).scrollTop(100).scrollTop()
* @result 100
*
* @example $(document).scrollTop(100).scrollTop()
* @result 100
*
* @example $("#testdiv").scrollTop(100).scrollTop()
* @result 100
*
* @name scrollTop
* @param Number value A positive number representing the desired scrollTop.
* @type jQuery
* @cat Plugins/Dimensions
*/
scrollTop: function(val) {
if (!this[0]) error();
if ( val != undefined )
// set the scroll top
return this.each(function() {
if (this == window || this == document)
window.scrollTo( $(window).scrollLeft(), val );
else
this.scrollTop = val;
});
// return the scroll top offset in pixels
if ( this[0] == window || this[0] == document )
return self.pageYOffset ||
$.boxModel && document.documentElement.scrollTop ||
document.body.scrollTop;
return this[0].scrollTop;
},
/**
* Gets the top and left positioned offset in pixels.
* The positioned offset is the offset between a positioned
* parent and the element itself.
*
* For accurate calculations make sure to use pixel values for margins, borders and padding.
*
* @example $("#testdiv").position()
* @result { top: 100, left: 100 }
*
* @example var position = {};
* $("#testdiv").position(position)
* @result position = { top: 100, left: 100 }
*
* @name position
* @param Object returnObject Optional An object to store the return value in, so as not to break the chain. If passed in the
* chain will not be broken and the result will be assigned to this object.
* @type Object
* @cat Plugins/Dimensions
*/
position: function(returnObject) {
return this.offset({ margin: false, scroll: false, relativeTo: this.offsetParent() }, returnObject);
},
/**
* Gets the location of the element in pixels from the top left corner of the viewport.
* The offset method takes an optional map of key value pairs to configure the way
* the offset is calculated. Here are the different options.
*
* (Boolean) margin - Should the margin of the element be included in the calculations? True by default.
* (Boolean) border - Should the border of the element be included in the calculations? False by default.
* (Boolean) padding - Should the padding of the element be included in the calculations? False by default.
* (Boolean) scroll - Should the scroll offsets of the parent elements be included in the calculations? True by default.
* When true it adds the total scroll offsets of all parents to the total offset and also adds two
* properties to the returned object, scrollTop and scrollLeft.
* (Boolean) lite - When true it will use the offsetLite method instead of the full-blown, slower offset method. False by default.
* Only use this when margins, borders and padding calculations don't matter.
* (HTML Element) relativeTo - This should be a parent of the element and should have position (like absolute or relative).
* It will retreive the offset relative to this parent element. By default it is the body element.
*
* Also an object can be passed as the second paramater to
* catch the value of the return and continue the chain.
*
* For accurate calculations make sure to use pixel values for margins, borders and padding.
*
* Known issues:
* - Issue: A div positioned relative or static without any content before it and its parent will report an offsetTop of 0 in Safari
* Workaround: Place content before the relative div ... and set height and width to 0 and overflow to hidden
*
* @example $("#testdiv").offset()
* @result { top: 100, left: 100, scrollTop: 10, scrollLeft: 10 }
*
* @example $("#testdiv").offset({ scroll: false })
* @result { top: 90, left: 90 }
*
* @example var offset = {}
* $("#testdiv").offset({ scroll: false }, offset)
* @result offset = { top: 90, left: 90 }
*
* @name offset
* @param Map options Optional settings to configure the way the offset is calculated.
* @param Object returnObject An object to store the return value in, so as not to break the chain. If passed in the
* chain will not be broken and the result will be assigned to this object.
* @type Object
* @cat Plugins/Dimensions
*/
offset: function(options, returnObject) {
if (!this[0]) error();
var x = 0, y = 0, sl = 0, st = 0,
elem = this[0], parent = this[0], op, parPos, elemPos = $.css(elem, 'position'),
mo = $.browser.mozilla, ie = $.browser.msie, oa = $.browser.opera,
sf = $.browser.safari, sf3 = $.browser.safari && parseInt($.browser.version) > 520,
absparent = false, relparent = false,
options = $.extend({ margin: true, border: false, padding: false, scroll: true, lite: false, relativeTo: document.body }, options || {});
// Use offsetLite if lite option is true
if (options.lite) return this.offsetLite(options, returnObject);
// Get the HTMLElement if relativeTo is a jquery collection
if (options.relativeTo.jquery) options.relativeTo = options.relativeTo[0];
if (elem.tagName == 'BODY') {
// Safari 2 is the only one to get offsetLeft and offsetTop properties of the body "correct"
// Except they all mess up when the body is positioned absolute or relative
x = elem.offsetLeft;
y = elem.offsetTop;
// Mozilla ignores margin and subtracts border from body element
if (mo) {
x += num(elem, 'marginLeft') + (num(elem, 'borderLeftWidth')*2);
y += num(elem, 'marginTop') + (num(elem, 'borderTopWidth') *2);
} else
// Opera ignores margin
if (oa) {
x += num(elem, 'marginLeft');
y += num(elem, 'marginTop');
} else
// IE does not add the border in Standards Mode
if ((ie && jQuery.boxModel)) {
x += num(elem, 'borderLeftWidth');
y += num(elem, 'borderTopWidth');
} else
// Safari 3 doesn't not include border or margin
if (sf3) {
x += num(elem, 'marginLeft') + num(elem, 'borderLeftWidth');
y += num(elem, 'marginTop') + num(elem, 'borderTopWidth');
}
} else {
do {
parPos = $.css(parent, 'position');
x += parent.offsetLeft;
y += parent.offsetTop;
// Mozilla and IE do not add the border
// Mozilla adds the border for table cells
if ((mo && !parent.tagName.match(/^t[d|h]$/i)) || ie || sf3) {
// add borders to offset
x += num(parent, 'borderLeftWidth');
y += num(parent, 'borderTopWidth');
// Mozilla does not include the border on body if an element isn't positioned absolute and is without an absolute parent
if (mo && parPos == 'absolute') absparent = true;
// IE does not include the border on the body if an element is position static and without an absolute or relative parent
if (ie && parPos == 'relative') relparent = true;
}
op = parent.offsetParent || document.body;
if (options.scroll || mo) {
do {
if (options.scroll) {
// get scroll offsets
sl += parent.scrollLeft;
st += parent.scrollTop;
}
// Opera sometimes incorrectly reports scroll offset for elements with display set to table-row or inline
if (oa && ($.css(parent, 'display') || '').match(/table-row|inline/)) {
sl = sl - ((parent.scrollLeft == parent.offsetLeft) ? parent.scrollLeft : 0);
st = st - ((parent.scrollTop == parent.offsetTop) ? parent.scrollTop : 0);
}
// Mozilla does not add the border for a parent that has overflow set to anything but visible
if (mo && parent != elem && $.css(parent, 'overflow') != 'visible') {
x += num(parent, 'borderLeftWidth');
y += num(parent, 'borderTopWidth');
}
parent = parent.parentNode;
} while (parent != op);
}
parent = op;
// exit the loop if we are at the relativeTo option but not if it is the body or html tag
if (parent == options.relativeTo && !(parent.tagName == 'BODY' || parent.tagName == 'HTML')) {
// Mozilla does not add the border for a parent that has overflow set to anything but visible
if (mo && parent != elem && $.css(parent, 'overflow') != 'visible') {
x += num(parent, 'borderLeftWidth');
y += num(parent, 'borderTopWidth');
}
// Safari 2 and opera includes border on positioned parents
if ( ((sf && !sf3) || oa) && parPos != 'static' ) {
x -= num(op, 'borderLeftWidth');
y -= num(op, 'borderTopWidth');
}
break;
}
if (parent.tagName == 'BODY' || parent.tagName == 'HTML') {
// Safari 2 and IE Standards Mode doesn't add the body margin for elments positioned with static or relative
if (((sf && !sf3) || (ie && $.boxModel)) && elemPos != 'absolute' && elemPos != 'fixed') {
x += num(parent, 'marginLeft');
y += num(parent, 'marginTop');
}
// Safari 3 does not include the border on body
// Mozilla does not include the border on body if an element isn't positioned absolute and is without an absolute parent
// IE does not include the border on the body if an element is positioned static and without an absolute or relative parent
if ( sf3 || (mo && !absparent && elemPos != 'fixed') ||
(ie && elemPos == 'static' && !relparent) ) {
x += num(parent, 'borderLeftWidth');
y += num(parent, 'borderTopWidth');
}
break; // Exit the loop
}
} while (parent);
}
var returnValue = handleOffsetReturn(elem, options, x, y, sl, st);
if (returnObject) { $.extend(returnObject, returnValue); return this; }
else { return returnValue; }
},
/**
* Gets the location of the element in pixels from the top left corner of the viewport.
* This method is much faster than offset but not as accurate when borders and margins are
* on the element and/or its parents. This method can be invoked
* by setting the lite option to true in the offset method.
* The offsetLite method takes an optional map of key value pairs to configure the way
* the offset is calculated. Here are the different options.
*
* (Boolean) margin - Should the margin of the element be included in the calculations? True by default.
* (Boolean) border - Should the border of the element be included in the calculations? False by default.
* (Boolean) padding - Should the padding of the element be included in the calcuations? False by default.
* (Boolean) scroll - Sould the scroll offsets of the parent elements be included int he calculations? True by default.
* When true it adds the total scroll offsets of all parents to the total offset and also adds two
* properties to the returned object, scrollTop and scrollLeft.
* (HTML Element) relativeTo - This should be a parent of the element and should have position (like absolute or relative).
* It will retreive the offset relative to this parent element. By default it is the body element.
*
* @name offsetLite
* @param Map options Optional settings to configure the way the offset is calculated.
* @param Object returnObject An object to store the return value in, so as not to break the chain. If passed in the
* chain will not be broken and the result will be assigned to this object.
* @type Object
* @cat Plugins/Dimensions
*/
offsetLite: function(options, returnObject) {
if (!this[0]) error();
var x = 0, y = 0, sl = 0, st = 0, parent = this[0], offsetParent,
options = $.extend({ margin: true, border: false, padding: false, scroll: true, relativeTo: document.body }, options || {});
// Get the HTMLElement if relativeTo is a jquery collection
if (options.relativeTo.jquery) options.relativeTo = options.relativeTo[0];
do {
x += parent.offsetLeft;
y += parent.offsetTop;
offsetParent = parent.offsetParent || document.body;
if (options.scroll) {
// get scroll offsets
do {
sl += parent.scrollLeft;
st += parent.scrollTop;
parent = parent.parentNode;
} while(parent != offsetParent);
}
parent = offsetParent;
} while (parent && parent.tagName != 'BODY' && parent.tagName != 'HTML' && parent != options.relativeTo);
var returnValue = handleOffsetReturn(this[0], options, x, y, sl, st);
if (returnObject) { $.extend(returnObject, returnValue); return this; }
else { return returnValue; }
},
/**
* Returns a jQuery collection with the positioned parent of
* the first matched element. This is the first parent of
* the element that has position (as in relative or absolute).
*
* @name offsetParent
* @type jQuery
* @cat Plugins/Dimensions
*/
offsetParent: function() {
if (!this[0]) error();
var offsetParent = this[0].offsetParent;
while ( offsetParent && (offsetParent.tagName != 'BODY' && $.css(offsetParent, 'position') == 'static') )
offsetParent = offsetParent.offsetParent;
return $(offsetParent);
}
});
/**
* Throws an error message when no elements are in the jQuery collection
* @private
*/
var error = function() {
throw "Dimensions: jQuery collection is empty";
};
/**
* Handles converting a CSS Style into an Integer.
* @private
*/
var num = function(el, prop) {
return parseInt($.css(el.jquery?el[0]:el,prop))||0;
};
/**
* Handles the return value of the offset and offsetLite methods.
* @private
*/
var handleOffsetReturn = function(elem, options, x, y, sl, st) {
if ( !options.margin ) {
x -= num(elem, 'marginLeft');
y -= num(elem, 'marginTop');
}
// Safari and Opera do not add the border for the element
if ( options.border && (($.browser.safari && parseInt($.browser.version) < 520) || $.browser.opera) ) {
x += num(elem, 'borderLeftWidth');
y += num(elem, 'borderTopWidth');
} else if ( !options.border && !(($.browser.safari && parseInt($.browser.version) < 520) || $.browser.opera) ) {
x -= num(elem, 'borderLeftWidth');
y -= num(elem, 'borderTopWidth');
}
if ( options.padding ) {
x += num(elem, 'paddingLeft');
y += num(elem, 'paddingTop');
}
// do not include scroll offset on the element ... opera sometimes reports scroll offset as actual offset
if ( options.scroll && (!$.browser.opera || elem.offsetLeft != elem.scrollLeft && elem.offsetTop != elem.scrollLeft) ) {
sl -= elem.scrollLeft;
st -= elem.scrollTop;
}
return options.scroll ? { top: y - st, left: x - sl, scrollTop: st, scrollLeft: sl }
: { top: y, left: x };
};
/**
* Gets the width of the OS scrollbar
* @private
*/
var scrollbarWidth = 0;
var getScrollbarWidth = function() {
if (!scrollbarWidth) {
var testEl = $('<div>')
.css({
width: 100,
height: 100,
overflow: 'auto',
position: 'absolute',
top: -1000,
left: -1000
})
.appendTo('body');
scrollbarWidth = 100 - testEl
.append('<div>')
.find('div')
.css({
width: '100%',
height: 200
})
.width();
testEl.remove();
}
return scrollbarWidth;
};
})(jQuery);