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/*
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* jQuery ifixpng plugin
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* (previously known as pngfix)
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* Version 2.1 (23/04/2008)+jquery1.9fix
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* @requires jQuery v1.1.3 or above
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*
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* Examples at: http://jquery.khurshid.com
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* Copyright (c) 2007 Kush M.
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* Dual licensed under the MIT and GPL licenses:
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* http://www.opensource.org/licenses/mit-license.php
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* http://www.gnu.org/licenses/gpl.html
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*/
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/**
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*
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* @example
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*
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* optional if location of pixel.gif if different to default which is images/pixel.gif
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* $.ifixpng('media/pixel.gif');
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*
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* $('img[@src$=.png], #panel').ifixpng();
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*
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* @apply hack to all png images and #panel which icluded png img in its css
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*
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* @name ifixpng
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* @type jQuery
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* @cat Plugins/Image
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* @return jQuery
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* @author jQuery Community
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*/
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(function($) {
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/**
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* helper variables and function
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*/
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$.ifixpng = function(customPixel) {
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if (customPixel !== undefined) {
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$.ifixpng.pixel = customPixel;
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}
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};
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$.ifixpng.getPixel = function() {
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return $.ifixpng.pixel || 'images/pixel.gif';
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};
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var hack = {
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ltie7 : (navigator.userAgent.match(/MSIE ((5\.5)|(6\.))/) !== null),
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filter : function(src) {
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return "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true,sizingMethod=scale,src='"+src+"')";
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}
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};
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/**
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* Applies ie png hack to selected dom elements
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*
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* $('img[@src$=.png]').ifixpng();
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* @desc apply hack to all images with png extensions
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*
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* $('#panel, img[@src$=.png]').ifixpng();
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* @desc apply hack to element #panel and all images with png extensions
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*
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* @name ifixpng
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*/
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$.fn.ifixpng = hack.ltie7 ? function(customPixel) {
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if (customPixel !== undefined) {
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$.ifixpng.pixel = customPixel;
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}
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return this.each(function() {
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var filter = $(this).css('filter');
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if (!filter.match(/src=["']?(.*\.png([?].*)?)["']?/i)) { // if not yet executed
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// in case rewriting urls
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var base = $('base').attr('href');
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if (base) {
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// remove anything after the last '/'
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base = base.replace(/\/[^\/]+$/,'/');
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}
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if ($(this).is('img') || $(this).is('input')) { // hack image tags present in dom
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if ($(this).attr('src')) {
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if ($(this).attr('src').match(/.*\.png([?].*)?$/i)) { // make sure it is png image
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// use source tag value if set
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var source = (base && $(this).attr('src').search(/^(\/|http:)/i)) ? base + $(this).attr('src') : $(this).attr('src');
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// apply filter
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$(this).css({filter:hack.filter(source), width:$(this).width(), height:$(this).height()})
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.attr({src:$.ifixpng.getPixel()})
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.positionFix();
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}
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}
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} else { // hack png css properties present inside css
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var image = $(this).css('backgroundImage');
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if (image.match(/^url\(["']?(.*\.png([?].*)?)["']?\)$/i)) {
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image = RegExp.$1;
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image = (base && image.substring(0,1)!='/') ? base + image : image;
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$(this).css({backgroundImage:'none', filter:hack.filter(image)})
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.children().children().positionFix();
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}
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}
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}
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});
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} : function() { return this; };
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/**
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* Removes any png hack that may have been applied previously
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*
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* $('img[@src$=.png]').iunfixpng();
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* @desc revert hack on all images with png extensions
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*
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* $('#panel, img[@src$=.png]').iunfixpng();
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* @desc revert hack on element #panel and all images with png extensions
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*
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* @name iunfixpng
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*/
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$.fn.iunfixpng = hack.ltie7 ? function() {
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return this.each(function() {
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var src = $(this).css('filter');
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if (src.match(/src=["']?(.*\.png([?].*)?)["']?/i)) { // get img source from filter
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src = RegExp.$1;
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if ($(this).is('img') || $(this).is('input')) {
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$(this).attr({src:src}).css({filter:''});
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} else {
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$(this).css({filter:'', background:'url('+src+')'});
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}
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}
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});
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} : function() { return this; };
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/**
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* positions selected item relatively
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*/
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$.fn.positionFix = function() {
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return this.each(function() {
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var position = $(this).css('position');
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if (position != 'absolute' && position != 'relative') {
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$(this).css({position:'relative'});
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}
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});
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};
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})(jQuery);
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