/**
 * --------------------------------------------------------------------
 * jQuery-Plugin "pngFix"
 * Version: 1.2, 09.03.2009
 * by Andreas Eberhard, andreas.eberhard@gmail.com
 *                      http://jquery.andreaseberhard.de/
 *
 * Copyright (c) 2007 Andreas Eberhard
 * Licensed under GPL (http://www.opensource.org/licenses/gpl-license.php)
 *
 * Changelog:
 *    09.03.2009 Version 1.2
 *    - Update for jQuery 1.3.x, removed @ from selectors
 *    11.09.2007 Version 1.1
 *    - removed noConflict
 *    - added png-support for input type=image
 *    - 01.08.2007 CSS background-image support extension added by Scott Jehl, scott@filamentgroup.com, http://www.filamentgroup.com
 *    31.05.2007 initial Version 1.0
 * --------------------------------------------------------------------
 * @example $(function(){$(document).pngFix();});
 * @desc Fixes all PNG's in the document on document.ready
 *
 * jQuery(function(){jQuery(document).pngFix();});
 * @desc Fixes all PNG's in the document on document.ready when using noConflict
 *
 * @example $(function(){$('div.examples').pngFix();});
 * @desc Fixes all PNG's within div with class examples
 *
 * @example $(function(){$('div.examples').pngFix( { blankgif:'ext.gif' } );});
 * @desc Fixes all PNG's within div with class examples, provides blank gif for input with png
 * --------------------------------------------------------------------
 */



(function($) {

  jQuery.expr[':'].regex = function(elem, index, match) {
       var matchParams = match[3].split(','),
           validLabels = /^(data|css):/,
           attr = {
               method: matchParams[0].match(validLabels) ? 
                           matchParams[0].split(':')[0] : 'attr',
               property: matchParams.shift().replace(validLabels,'')
           },
           regexFlags = 'ig',
           regex = new RegExp(matchParams.join('').replace(/^\s+|\s+$/g,''), regexFlags);
       return regex.test(jQuery(elem)[attr.method](attr.property));
   };


jQuery.fn.pngFix = function(settings) {

	// Settings
	settings = jQuery.extend({
		blankgif: '/images/blank.gif'
	}, settings);

	var ie55 = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) == 4 && navigator.appVersion.indexOf("MSIE 5.5") != -1);
	var ie6 =  (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) == 4 && navigator.appVersion.indexOf("MSIE 6.0") != -1);
  log(settings)
  if (jQuery.browser.msie){

  if(!settings.ignore_regex){
    settings.ignore_regex = null  ;
  }
    //fix images with png-source
    jQuery(this).find("img:regex(src, \.png)").each(function() {
     jQuery(this).attr('width',jQuery(this).width());
     jQuery(this).attr('height',jQuery(this).height());
     var prevStyle = '';
     var strNewHTML = '';
     var imgId = (jQuery(this).attr('id')) ? 'id="' + jQuery(this).attr('id') + '" ' : '';
     var imgClass = (jQuery(this).attr('class')) ? 'class="' + jQuery(this).attr('class') + '" ' : '';
     var imgTitle = (jQuery(this).attr('title')) ? 'title="' + jQuery(this).attr('title') + '" ' : '';
     var imgAlt = (jQuery(this).attr('alt')) ? 'alt="' + jQuery(this).attr('alt') + '" ' : '';
     var imgAlign = (jQuery(this).attr('align')) ? 'float:' + jQuery(this).attr('align') + ';' : '';
     var imgHand = (jQuery(this).parent().attr('href')) ? 'cursor:hand;' : '';
     if (this.style.border) {
       prevStyle += 'border:'+this.style.border+';';
       this.style.border = '';
     }
     if (this.style.padding) {
       prevStyle += 'padding:'+this.style.padding+';';
       this.style.padding = '';
     }
     if (this.style.margin) {
       prevStyle += 'margin:'+this.style.margin+';';
       this.style.margin = '';
     }
     var imgStyle = (this.style.cssText);
    
     strNewHTML += '<span '+imgId+imgClass+imgTitle+imgAlt;
     strNewHTML += 'style="position:relative;white-space:pre-line;display:inline-block;background:transparent;'+imgAlign+imgHand;
     strNewHTML += 'width:' + jQuery(this).width() + 'px;' + 'height:' + jQuery(this).height() + 'px;';
     strNewHTML += 'filter:progid:DXImageTransform.Microsoft.AlphaImageLoader' + '(src=\'' + jQuery(this).attr('src') + '\', sizingMethod=\'scale\');';
     strNewHTML += imgStyle+'"></span>';
     if (prevStyle != ''){
       strNewHTML = '<span style="position:relative;display:inline-block;'+prevStyle+imgHand+'width:' + jQuery(this).width() + 'px;' + 'height:' + jQuery(this).height() + 'px;'+'">' + strNewHTML + '</span>';
     }
    
     jQuery(this).hide();
     jQuery(this).after(strNewHTML);
    
    });

    // fix css background pngs for ie6 (and ie5.5 but who cares?)
    if(ie55 || ie6){
      selector = settings.selector || "*";
      log('replacing pngs for selector: ', selector);
      jQuery(this).find(selector).each(function(){
       var bgIMG = jQuery(this).css('background-image');
       if(bgIMG.indexOf(".png")!=-1){
         // console.debug(bgIMG)
         if(!bgIMG.match(settings.ignore_regex)){
            if(bgIMG.match("\"")){
              var iebg = bgIMG.split('url("')[1].split('")')[0];
            }
            else{
              var iebg = bgIMG.split('url(')[1].split(')')[0];
            }
           jQuery(this).css('background-image', 'none');
           jQuery(this).get(0).runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + iebg + "',sizingMethod='scale')";
         }

      }
    });
  }
		//fix input with png-source
		jQuery(this).find("input:regex(src, \.png)").each(function() {
			var bgIMG = jQuery(this).attr('src');
			jQuery(this).get(0).runtimeStyle.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader' + '(src=\'' + bgIMG + '\', sizingMethod=\'scale\');';
   		jQuery(this).attr('src', settings.blankgif);
		});
	
  }
	
	return jQuery;

};

})(jQuery);