/*
 * Background position Fixed
 * Also fixes non-visible images
 * Yereth Jansen (yereth@yereth.nl)
 * personal website: www.yereth.nl
 *
 */

/**
 * jQuery ifixpng plugin
 * (previously known as pngfix)
 * Version 3.0  (2008/06/20)
 * @apply hack to all png images and #panel which icluded png img in its css
 *
 * @name ifixpng
 * @type jQuery
 * @cat Plugins/Image
 * @return jQuery
 * @author jQuery Community
 * @requires jQuery v1.2.0 or above
 *
 * Examples at: http://jquery.khurshid.com
 * Copyright (c) 2007 Kush M.
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 */

(function($) {
	$.ifixpng = function(customPixel) { $.ifixpng.pixel = customPixel; };
	$.ifixpng.regexp = { bg: /^url\(["']?(.*\.png([?].*)?)["']?\)$/i, img: /.*\.png([?].*)?$/i },
	$.ifixpng.getPixel = function() { return $.ifixpng.pixel || 'images/pixel.gif'; };
	var hack = { base: $('base').attr('href'), ltie7: $.browser.msie && $.browser.version < 7, filter: function(src) { return "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true,sizingMethod=crop,src='"+src+"')"; } };

	$.fn.ifixpng = hack.ltie7 ? function() {
		function fixImage(image, source, width, height, hidden) { image.css({filter:hack.filter(source), width: width, height: height}).attr({src:$.ifixpng.getPixel()}).positionFix(); }

    	return this.each(function() {
			var $$ = $(this);
			if ($$.is('img') || $$.is('input')) {
				var source, img;
				if (this.src && this.src.match($.ifixpng.regexp.img)) {
					source = (hack.base && this.src.substring(0,1)!='/' && this.src.indexOf(hack.base) === -1) ? hack.base + this.src : this.src;
					if (!this.width || !this.height) {
						$(new Image()).one('load', function() {
							fixImage($$, source, this.width, this.height);
							$(this).remove();
						}).attr('src', source);
					} else fixImage($$, source, this.width, this.height);
				}
			} else if (this.style) {
				var imageSrc = $$.css('backgroundImage');
				if (imageSrc && imageSrc.match($.ifixpng.regexp.bg) && this.currentStyle.backgroundRepeat == 'no-repeat') {
					imageSrc = RegExp.$1;
					var x = this.currentStyle.backgroundPositionX || 0, y = this.currentStyle.backgroundPositionY || 0;
					if (x || y) {
						var css = {}, img;
						if (x == 'left') css.left = 0;
						else if (x == 'right') css.right = $$.outerWidth() % 2 === 1 ? -1 : 0;
						else if (x.indexOf('%') == -1 || parseInt(x) < 50) css.left = x;
						else css.right = (100 - parseInt(x)) + '%';
						if (y == 'bottom') css.bottom = $$.outerHeight() % 2 === 1 ? -1 : 0;
						else if (y == 'top') css.top = 0;
						else if (y.indexOf('%') == -1 || parseInt(y) < 50) css.top = y;
						else css.bottom = (100 - parseInt(y)) + '%';
						img = new Image();
						$(img).one('load', function() {
							if (css.top == 'center') css.top = ($$.outerHeight() - this.height) / 2;
							if (css.left == 'center') css.left = ($$.outerWidth() - this.width) / 2;
							$$.positionFix().css({backgroundImage: 'none'}).prepend(
								$('<div></div>').css(css).css({
									width: this.width,
									height: this.height,
									position: 'absolute',
									filter: hack.filter(imageSrc)
								})
							);
							$(this).remove();
						});
						img.src = imageSrc;
					} else {
						$$.css({backgroundImage: 'none', filter:hack.filter(imageSrc)});
					}
				}
			}
		});
	} : function() { return this; };

	$.fn.positionFix = function() {
		return this.each(function() {
			var $$ = $(this);
			if ($$.css('position') != 'absolute') $$.css({position:'relative'});
		});
	};

})(jQuery);



/**
 * Automatically apply IE6 fix to transparent PNG24 images on the page.
 * Elements that have a transparent PNG24 as their background set with CSS must have the class 'pngfix'.
 *
 * @author Istvan
 * @version 0001
 * @requires ifixpng 3.0
*/
/*
$(function()
{
	if ($.browser.msie && $.browser.version < 7)
	{
		$.ifixpng('/wd_global/images/wquery/pixel.gif');
		$('img[@src$=.png], .pngfix').ifixpng();
	}
});
*/