/* 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: 2007-10-06 20:11:15 +0200 (sa, 06 okt 2007) $
 * $rev: 3581 $
 *
 * version: @version
 *
 * requires: jquery 1.2+
 */

(function($){
	
$.dimensions = {
	version: '@version'
};

// create innerheight, innerwidth, outerheight and outerwidth methods
$.each( [ 'height', 'width' ], function(i, name){
	
	// innerheight and innerwidth
	$.fn[ 'inner' + name ] = function() {
		if (!this[0]) return;
		
		var torl = name == 'height' ? 'top'    : 'left',  // top or left
		    borr = name == 'height' ? 'bottom' : 'right'; // bottom or right
		
		return num( this, name.tolowercase() ) + num(this, 'padding' + torl) + num(this, 'padding' + borr);
	};
	
	// outerheight and outerwidth
	$.fn[ 'outer' + name ] = function(options) {
		if (!this[0]) return;
		
		var torl = name == 'height' ? 'top'    : 'left',  // top or left
		    borr = name == 'height' ? 'bottom' : 'right'; // bottom or right
		
		options = $.extend({ margin: false }, options || {});
		
		return num( this, name.tolowercase() )
				+ num(this, 'border' + torl + 'width') + num(this, 'border' + borr + 'width')
				+ num(this, 'padding' + torl) + num(this, 'padding' + borr)
				+ (options.margin ? (num(this, 'margin' + torl) + num(this, 'margin' + borr)) : 0);
	};
});

// create scrollleft and scrolltop methods
$.each( ['left', 'top'], function(i, name) {
	$.fn[ 'scroll' + name ] = function(val) {
		if (!this[0]) return;
		
		return val != undefined ?
		
			// set the scroll offset
			this.each(function() {
				this == window || this == document ?
					window.scrollto( 
						name == 'left' ? val : $(window)[ 'scrollleft' ](),
						name == 'top'  ? val : $(window)[ 'scrolltop'  ]()
					) :
					this[ 'scroll' + name ] = val;
			}) :
			
			// return the scroll offset
			this[0] == window || this[0] == document ?
				self[ (name == 'left' ? 'pagexoffset' : 'pageyoffset') ] ||
					$.boxmodel && document.documentelement[ 'scroll' + name ] ||
					document.body[ 'scroll' + name ] :
				this[0][ 'scroll' + name ];
	};
});

$.fn.extend({
	position: function() {
		var left = 0, top = 0, elem = this[0], offset, parentoffset, offsetparent, results;
		
		if (elem) {
			// get *real* offsetparent
			offsetparent = this.offsetparent();
			
			// get correct offsets
			offset       = this.offset();
			parentoffset = offsetparent.offset();
			
			// subtract element margins
			offset.top  -= num(elem, 'margintop');
			offset.left -= num(elem, 'marginleft');
			
			// add offsetparent borders
			parentoffset.top  += num(offsetparent, 'bordertopwidth');
			parentoffset.left += num(offsetparent, 'borderleftwidth');
			
			// subtract the two offsets
			results = {
				top:  offset.top  - parentoffset.top,
				left: offset.left - parentoffset.left
			};
		}
		
		return results;
	},
	
	offsetparent: function() {
		var offsetparent = this[0].offsetparent;
		while ( offsetparent && (!/^body|html$/i.test(offsetparent.tagname) && $.css(offsetparent, 'position') == 'static') )
			offsetparent = offsetparent.offsetparent;
		return $(offsetparent);
	}
});

function num(el, prop) {
	return parseint($.css(el.jquery?el[0]:el,prop))||0;
};

})(jquery);