504 lines
17 KiB
JavaScript
504 lines
17 KiB
JavaScript
/* Copyright (c) 2007 Paul Bakaus (paul.bakaus@googlemail.com) and Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
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* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
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* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
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*
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* $LastChangedDate: 2007-06-22 04:38:37 +0200 (Fr, 22 Jun 2007) $
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* $Rev: 2141 $
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*
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* Version: 1.0b2
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*/
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(function($){
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// store a copy of the core height and width methods
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var height = $.fn.height,
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width = $.fn.width;
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$.fn.extend({
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/**
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* If used on document, returns the document's height (innerHeight)
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* If used on window, returns the viewport's (window) height
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* See core docs on height() to see what happens when used on an element.
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*
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* @example $("#testdiv").height()
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* @result 200
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*
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* @example $(document).height()
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* @result 800
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*
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* @example $(window).height()
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* @result 400
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*
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* @name height
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* @type Object
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* @cat Plugins/Dimensions
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*/
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height: function() {
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if ( this[0] == window )
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return self.innerHeight ||
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$.boxModel && document.documentElement.clientHeight ||
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document.body.clientHeight;
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if ( this[0] == document )
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return Math.max( document.body.scrollHeight, document.body.offsetHeight );
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return height.apply(this, arguments);
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},
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/**
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* If used on document, returns the document's width (innerWidth)
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* If used on window, returns the viewport's (window) width
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* See core docs on height() to see what happens when used on an element.
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*
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* @example $("#testdiv").width()
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* @result 200
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*
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* @example $(document).width()
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* @result 800
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*
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* @example $(window).width()
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* @result 400
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*
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* @name width
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* @type Object
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* @cat Plugins/Dimensions
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*/
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width: function() {
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if ( this[0] == window )
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return self.innerWidth ||
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$.boxModel && document.documentElement.clientWidth ||
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document.body.clientWidth;
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if ( this[0] == document )
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return Math.max( document.body.scrollWidth, document.body.offsetWidth );
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return width.apply(this, arguments);
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},
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/**
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* Returns the inner height value (without border) for the first matched element.
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* If used on document, returns the document's height (innerHeight)
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* If used on window, returns the viewport's (window) height
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*
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* @example $("#testdiv").innerHeight()
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* @result 800
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*
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* @name innerHeight
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* @type Number
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* @cat Plugins/Dimensions
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*/
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innerHeight: function() {
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return this[0] == window || this[0] == document ?
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this.height() :
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this.is(':visible') ?
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this[0].offsetHeight - num(this, 'borderTopWidth') - num(this, 'borderBottomWidth') :
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this.height() + num(this, 'paddingTop') + num(this, 'paddingBottom');
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},
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/**
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* Returns the inner width value (without border) for the first matched element.
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* If used on document, returns the document's Width (innerWidth)
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* If used on window, returns the viewport's (window) width
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*
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* @example $("#testdiv").innerWidth()
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* @result 1000
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*
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* @name innerWidth
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* @type Number
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* @cat Plugins/Dimensions
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*/
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innerWidth: function() {
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return this[0] == window || this[0] == document ?
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this.width() :
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this.is(':visible') ?
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this[0].offsetWidth - num(this, 'borderLeftWidth') - num(this, 'borderRightWidth') :
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this.width() + num(this, 'paddingLeft') + num(this, 'paddingRight');
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},
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/**
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* Returns the outer height value (including border) for the first matched element.
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* Cannot be used on document or window.
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*
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* @example $("#testdiv").outerHeight()
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* @result 1000
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*
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* @name outerHeight
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* @type Number
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* @cat Plugins/Dimensions
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*/
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outerHeight: function() {
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return this[0] == window || this[0] == document ?
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this.height() :
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this.is(':visible') ?
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this[0].offsetHeight :
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this.height() + num(this,'borderTopWidth') + num(this, 'borderBottomWidth') + num(this, 'paddingTop') + num(this, 'paddingBottom');
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},
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/**
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* Returns the outer width value (including border) for the first matched element.
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* Cannot be used on document or window.
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*
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* @example $("#testdiv").outerHeight()
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* @result 1000
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*
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* @name outerHeight
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* @type Number
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* @cat Plugins/Dimensions
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*/
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outerWidth: function() {
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return this[0] == window || this[0] == document ?
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this.width() :
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this.is(':visible') ?
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this[0].offsetWidth :
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this.width() + num(this, 'borderLeftWidth') + num(this, 'borderRightWidth') + num(this, 'paddingLeft') + num(this, 'paddingRight');
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},
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/**
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* Returns how many pixels the user has scrolled to the right (scrollLeft).
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* Works on containers with overflow: auto and window/document.
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*
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* @example $("#testdiv").scrollLeft()
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* @result 100
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*
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* @name scrollLeft
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* @type Number
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* @cat Plugins/Dimensions
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*/
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/**
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* Sets the scrollLeft property and continues the chain.
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* Works on containers with overflow: auto and window/document.
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*
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* @example $("#testdiv").scrollLeft(10).scrollLeft()
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* @result 10
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*
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* @name scrollLeft
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* @param Number value A positive number representing the desired scrollLeft.
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* @type jQuery
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* @cat Plugins/Dimensions
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*/
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scrollLeft: function(val) {
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if ( val != undefined )
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// set the scroll left
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return this.each(function() {
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if (this == window || this == document)
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window.scrollTo( val, $(window).scrollTop() );
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else
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this.scrollLeft = val;
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});
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// return the scroll left offest in pixels
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if ( this[0] == window || this[0] == document )
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return self.pageXOffset ||
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$.boxModel && document.documentElement.scrollLeft ||
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document.body.scrollLeft;
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return this[0].scrollLeft;
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},
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/**
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* Returns how many pixels the user has scrolled to the bottom (scrollTop).
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* Works on containers with overflow: auto and window/document.
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*
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* @example $("#testdiv").scrollTop()
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* @result 100
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*
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* @name scrollTop
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* @type Number
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* @cat Plugins/Dimensions
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*/
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/**
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* Sets the scrollTop property and continues the chain.
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* Works on containers with overflow: auto and window/document.
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*
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* @example $("#testdiv").scrollTop(10).scrollTop()
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* @result 10
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*
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* @name scrollTop
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* @param Number value A positive number representing the desired scrollTop.
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* @type jQuery
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* @cat Plugins/Dimensions
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*/
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scrollTop: function(val) {
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if ( val != undefined )
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// set the scroll top
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return this.each(function() {
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if (this == window || this == document)
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window.scrollTo( $(window).scrollLeft(), val );
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else
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this.scrollTop = val;
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});
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// return the scroll top offset in pixels
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if ( this[0] == window || this[0] == document )
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return self.pageYOffset ||
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$.boxModel && document.documentElement.scrollTop ||
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document.body.scrollTop;
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return this[0].scrollTop;
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},
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/**
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* Returns the top and left positioned offset in pixels.
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* The positioned offset is the offset between a positioned
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* parent and the element itself.
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*
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* @example $("#testdiv").position()
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* @result { top: 100, left: 100 }
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*
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* @name position
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* @param Map options Optional settings to configure the way the offset is calculated.
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* @option Boolean margin Should the margin of the element be included in the calculations? False by default.
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* @option Boolean border Should the border of the element be included in the calculations? False by default.
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* @option Boolean padding Should the padding of the element be included in the calculations? False by default.
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* @param Object returnObject An object to store the return value in, so as not to break the chain. If passed in the
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* chain will not be broken and the result will be assigned to this object.
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* @type Object
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* @cat Plugins/Dimensions
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*/
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position: function(options, returnObject) {
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var elem = this[0], parent = elem.parentNode, op = elem.offsetParent,
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options = $.extend({ margin: false, border: false, padding: false, scroll: false }, options || {}),
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x = elem.offsetLeft,
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y = elem.offsetTop,
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sl = elem.scrollLeft,
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st = elem.scrollTop;
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// Mozilla and IE do not add the border
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if ($.browser.mozilla || $.browser.msie) {
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// add borders to offset
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x += num(elem, 'borderLeftWidth');
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y += num(elem, 'borderTopWidth');
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}
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if ($.browser.mozilla) {
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do {
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// Mozilla does not add the border for a parent that has overflow set to anything but visible
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if ($.browser.mozilla && parent != elem && $.css(parent, 'overflow') != 'visible') {
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x += num(parent, 'borderLeftWidth');
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y += num(parent, 'borderTopWidth');
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}
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if (parent == op) break; // break if we are already at the offestParent
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} while ((parent = parent.parentNode) && (parent.tagName.toLowerCase() != 'body' || parent.tagName.toLowerCase() != 'html'));
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}
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var returnValue = handleOffsetReturn(elem, options, x, y, sl, st);
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if (returnObject) { $.extend(returnObject, returnValue); return this; }
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else { return returnValue; }
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},
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/**
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* Returns the location of the element in pixels from the top left corner of the viewport.
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*
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* For accurate readings make sure to use pixel values for margins, borders and padding.
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*
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* Known issues:
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* - Issue: A div positioned relative or static without any content before it and its parent will report an offsetTop of 0 in Safari
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* Workaround: Place content before the relative div ... and set height and width to 0 and overflow to hidden
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*
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* @example $("#testdiv").offset()
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* @result { top: 100, left: 100, scrollTop: 10, scrollLeft: 10 }
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*
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* @example $("#testdiv").offset({ scroll: false })
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* @result { top: 90, left: 90 }
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*
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* @example var offset = {}
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* $("#testdiv").offset({ scroll: false }, offset)
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* @result offset = { top: 90, left: 90 }
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*
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* @name offset
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* @param Map options Optional settings to configure the way the offset is calculated.
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* @option Boolean margin Should the margin of the element be included in the calculations? True by default.
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* @option Boolean border Should the border of the element be included in the calculations? False by default.
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* @option Boolean padding Should the padding of the element be included in the calculations? False by default.
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* @option Boolean scroll Should the scroll offsets of the parent elements be included in the calculations? True by default.
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* When true it adds the totla scroll offets of all parents to the total offset and also adds two properties
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* to the returned object, scrollTop and scrollLeft.
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* @options Boolean lite Will use offsetLite instead of offset when set to true. False by default.
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* @param Object returnObject An object to store the return value in, so as not to break the chain. If passed in the
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* chain will not be broken and the result will be assigned to this object.
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* @type Object
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* @cat Plugins/Dimensions
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*/
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offset: function(options, returnObject) {
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var x = 0, y = 0, sl = 0, st = 0,
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elem = this[0], parent = this[0], op, parPos, elemPos = $.css(elem, 'position'),
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mo = $.browser.mozilla, ie = $.browser.msie, sf = $.browser.safari, oa = $.browser.opera,
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absparent = false, relparent = false,
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options = $.extend({ margin: true, border: false, padding: false, scroll: true, lite: false }, options || {});
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// Use offsetLite if lite option is true
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if (options.lite) return this.offsetLite(options, returnObject);
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if (elem.tagName.toLowerCase() == 'body') {
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// Safari is the only one to get offsetLeft and offsetTop properties of the body "correct"
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// Except they all mess up when the body is positioned absolute or relative
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x = elem.offsetLeft;
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y = elem.offsetTop;
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// Mozilla ignores margin and subtracts border from body element
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if (mo) {
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x += num(elem, 'marginLeft') + (num(elem, 'borderLeftWidth')*2);
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y += num(elem, 'marginTop') + (num(elem, 'borderTopWidth') *2);
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} else
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// Opera ignores margin
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if (oa) {
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x += num(elem, 'marginLeft');
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y += num(elem, 'marginTop');
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} else
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// IE does not add the border in Standards Mode
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if (ie && jQuery.boxModel) {
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x += num(elem, 'borderLeftWidth');
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y += num(elem, 'borderTopWidth');
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}
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} else {
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do {
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parPos = $.css(parent, 'position');
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x += parent.offsetLeft;
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y += parent.offsetTop;
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// Mozilla and IE do not add the border
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if (mo || ie) {
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// add borders to offset
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x += num(parent, 'borderLeftWidth');
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y += num(parent, 'borderTopWidth');
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// Mozilla does not include the border on body if an element isn't positioned absolute and is without an absolute parent
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if (mo && parPos == 'absolute') absparent = true;
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// IE does not include the border on the body if an element is position static and without an absolute or relative parent
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if (ie && parPos == 'relative') relparent = true;
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}
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op = parent.offsetParent;
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if (options.scroll || mo) {
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do {
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if (options.scroll) {
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// get scroll offsets
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sl += parent.scrollLeft;
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st += parent.scrollTop;
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}
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// Mozilla does not add the border for a parent that has overflow set to anything but visible
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if (mo && parent != elem && $.css(parent, 'overflow') != 'visible') {
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x += num(parent, 'borderLeftWidth');
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y += num(parent, 'borderTopWidth');
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}
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parent = parent.parentNode;
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} while (parent != op);
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}
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parent = op;
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if (parent.tagName.toLowerCase() == 'body' || parent.tagName.toLowerCase() == 'html') {
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// Safari and IE Standards Mode doesn't add the body margin for elments positioned with static or relative
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if ((sf || (ie && $.boxModel)) && elemPos != 'absolute' && elemPos != 'fixed') {
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x += num(parent, 'marginLeft');
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y += num(parent, 'marginTop');
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}
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// Mozilla does not include the border on body if an element isn't positioned absolute and is without an absolute parent
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// IE does not include the border on the body if an element is positioned static and without an absolute or relative parent
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if ( (mo && !absparent && elemPos != 'fixed') ||
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(ie && elemPos == 'static' && !relparent) ) {
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x += num(parent, 'borderLeftWidth');
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y += num(parent, 'borderTopWidth');
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}
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break; // Exit the loop
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}
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} while (parent);
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}
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var returnValue = handleOffsetReturn(elem, options, x, y, sl, st);
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if (returnObject) { $.extend(returnObject, returnValue); return this; }
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else { return returnValue; }
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},
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/**
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* Returns the location of the element in pixels from the top left corner of the viewport.
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* This method is much faster than offset but not as accurate. This method can be invoked
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* by setting the lite option to true in the offset method.
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*
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* @name offsetLite
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* @param Map options Optional settings to configure the way the offset is calculated.
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* @option Boolean margin Should the margin of the element be included in the calculations? True by default.
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* @option Boolean border Should the border of the element be included in the calculations? False by default.
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* @option Boolean padding Should the padding of the element be included in the calculations? False by default.
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* @option Boolean scroll Should the scroll offsets of the parent elements be included in the calculations? True by default.
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* When true it adds the totla scroll offets of all parents to the total offset and also adds two properties
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* to the returned object, scrollTop and scrollLeft.
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* @param Object returnObject An object to store the return value in, so as not to break the chain. If passed in the
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* chain will not be broken and the result will be assigned to this object.
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* @type Object
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* @cat Plugins/Dimensions
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*/
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offsetLite: function(options, returnObject) {
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var x = 0, y = 0, sl = 0, st = 0, parent = this[0], op,
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options = $.extend({ margin: true, border: false, padding: false, scroll: true }, options || {});
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do {
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x += parent.offsetLeft;
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y += parent.offsetTop;
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op = parent.offsetParent;
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if (options.scroll) {
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// get scroll offsets
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do {
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sl += parent.scrollLeft;
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st += parent.scrollTop;
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parent = parent.parentNode;
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} while(parent != op);
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}
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parent = op;
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} while (parent && parent.tagName.toLowerCase() != 'body' && parent.tagName.toLowerCase() != 'html');
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var returnValue = handleOffsetReturn(this[0], options, x, y, sl, st);
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if (returnObject) { $.extend(returnObject, returnValue); return this; }
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else { return returnValue; }
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}
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});
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/**
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* Handles converting a CSS Style into an Integer.
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* @private
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*/
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var num = function(el, prop) {
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return parseInt($.css(el.jquery?el[0]:el,prop))||0;
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};
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/**
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* Handles the return value of the offset and offsetLite methods.
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* @private
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*/
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var handleOffsetReturn = function(elem, options, x, y, sl, st) {
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if ( !options.margin ) {
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x -= num(elem, 'marginLeft');
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y -= num(elem, 'marginTop');
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}
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// Safari and Opera do not add the border for the element
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if ( options.border && ($.browser.safari || $.browser.opera) ) {
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x += num(elem, 'borderLeftWidth');
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y += num(elem, 'borderTopWidth');
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} else if ( !options.border && !($.browser.safari || $.browser.opera) ) {
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x -= num(elem, 'borderLeftWidth');
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y -= num(elem, 'borderTopWidth');
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}
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if ( options.padding ) {
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x += num(elem, 'paddingLeft');
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y += num(elem, 'paddingTop');
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}
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// do not include scroll offset on the element
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if ( options.scroll ) {
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sl -= elem.scrollLeft;
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st -= elem.scrollTop;
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}
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return options.scroll ? { top: y - st, left: x - sl, scrollTop: st, scrollLeft: sl }
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: { top: y, left: x };
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};
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})(jQuery); |