/*!
 * slideViewerPro 1.0
 * Examples and documentation at: 
 * http://www.gcmingati.net/wordpress/wp-content/lab/jquery/svwt/
 * 2009 Gian Carlo Mingati
 * Version: 1.0.4 (12-AUGUST-2009)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * Requires:
 * jQuery v1.3.2 or later
 * Option:
 * jQuery Timers plugin | plugins.jquery.com/project/timers (for autoslide mode)
 * 
 */
jQuery.extend( jQuery.easing, // from the jquery.easing plugin
{
	easeInOutExpo: function (x, t, b, c, d) {
		if (t==0) return b;
		if (t==d) return b+c;
		if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
		return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
	}
});
jQuery(function(){
   jQuery("div.svwp").prepend("<img src='/common/svwp/svwloader.gif' class='ldrgif' alt='loading...'>"); //change with YOUR loader image path
});
var j = 0;
jQuery.fn.slideViewerPro = function(settings) {
	  settings = jQuery.extend({
			galBorderWidth: 6,
			thumbsTopMargin: 3, 
			thumbsRightMargin: 3,
			thumbsBorderWidth: 3,
			buttonsWidth: 20,
			galBorderColor: "#ff0000",
			thumbsBorderColor: "#d8d8d8",
			thumbsActiveBorderColor: "#ff0000",
			buttonsTextColor: "#ff0000",
			thumbsBorderOpacity: 1.0, // could be 0, 0.1 up to 1.0
			thumbsActiveBorderOpacity: 1.0, // could be 0, 0.1 up to 1.0
			easeTime: 750,
			asTimer: 4000,
			thumbs: 5,
			thumbsPercentReduction: 12,
			thumbsVis: true,
			easeFunc: "easeInOutExpo",
			leftButtonInner: "-", //could be an image "<img src='images/larw.gif' />" or an escaped char as "&larr";
			rightButtonInner: "+", //could be an image or an escaped char as "&rarr";
			autoslide: false,
			typo: false,
			typoFullOpacity: 0.9,
			shuffle: false,
			
			autoCenterThumbs: true // keep thumbnail centered with current image
		}, settings);
		
	return this.each(function(){
		function shuffle(a) {
	    var i = a.size();
	    while (--i) {
	        var j = Math.floor(Math.random() * (i));
	        var tmp = a.slice(i, i+1);
	        a.slice(j, j+1).insertAfter(tmp);
	    }
		}
		var container = jQuery(this);
		(!settings.shuffle) ? null : shuffle(container.find("li"));
		container.find("img.ldrgif").remove();
		container.removeClass("svwp").addClass("slideViewer");	
		container.attr("id", "svwp"+j);
		var pictWidth = container.find("img").attr("width");
		var pictHeight = container.find("img").attr("height");
		var pictEls = container.find("li").size();
		(pictEls >= settings.thumbs) ? null : settings.thumbs = pictEls;
		var slideViewerWidth = pictWidth*pictEls;
		var thumbsWidth = Math.round(pictWidth*settings.thumbsPercentReduction/100);
		var thumbsHeight =  Math.round(pictHeight*settings.thumbsPercentReduction/100);
		var pos = 0; // position of leftmost thumbnail?
    container.find("ul").css("width" , slideViewerWidth)
    .wrap(jQuery("<div style='width:"+ pictWidth +"px; overflow: hidden; position: relative; top: 0; left: 0'>"));
		container.css("width" , pictWidth);
		container.css("height" , pictHeight);
		// setup the container
		container.each(function(i) {
			
			// Typography
			if(settings.typo)
			{
			jQuery(this).find("img").each(function(z) {
				jQuery(this).after("<span class='typo' style='position: absolute; width:"+(pictWidth-12)+"px; margin: 0 0 0 -"+pictWidth+"px'>"+jQuery(this).attr("alt")+"<\/span>");
			});
			}
			jQuery(this).after("<div class='thumbSlider' id='thumbSlider" + j + "'><ul><\/ul><\/div>");
			jQuery(this).next().after("<a href='#' class='left' id='left" + j + "'><span>"+settings.leftButtonInner+"</span><\/a><a href='#' class='right' id='right" + j + "'><span>"+settings.rightButtonInner+"<\/span><\/a>");
			
			jQuery(this).find("li").each(function(n) { 
						jQuery("div#thumbSlider" + j + " ul").append("<li><a title='" + jQuery(this).find("img").attr("alt") + "' href='#'><img width='"+ thumbsWidth +"' height='"+ thumbsHeight +"' src='" + jQuery(this).find("img").attr("src") + "' /><p class='tmbrdr'>&nbsp;<\/p><\/a><\/li>");						
			});
			
      // Thumbnail slider link click
			jQuery("div#thumbSlider" + j + " a").each(function(z) {
				jQuery(this).bind("click", function(){
					slideImageTo(z);
					return false;
				});
			});
			
			var thumbSlider = "div#thumbSlider" + j;
			
			// Center on image #z of first svwp
			function slideImageTo(z)
			{
				if (z < 0 || z >= pictEls) return false;
				var thumbLink = jQuery(thumbSlider+" a:eq("+z+")"); // TODO use j?
				var thumbSliderUl = thumbLink.parent().parent();
				jQuery(thumbSlider+" a").removeClass("active");
				thumbLink.addClass("active");
				thumbLink.find("p.tmbrdr").css({borderColor: settings.thumbsActiveBorderColor, opacity: settings.thumbsActiveBorderOpacity}); // set active thumb border
				thumbSliderUl.find("p.tmbrdr").not(thumbLink.find("p.tmbrdr")).css({borderColor: settings.thumbsBorderColor, opacity: settings.thumbsBorderOpacity}); // unset others
				var cnt = -(pictWidth*z);
				(cnt != container.find("ul").css("left").replace(/px/, "")) ? container.find("span.typo").animate({"opacity": 0}, 250) : null ;
				container.find("ul").animate({ left: cnt}, settings.easeTime, settings.easeFunc, function(){container.find("span.typo").animate({"opacity": settings.typoFullOpacity}, 250)}); // shift images

				if (settings.autoCenterThumbs)
				{
					var thumbSliderCnt = Math.max(0, z-Math.floor(settings.thumbs/2)); // lower index bound; don't slide right at all
					thumbSliderCnt = Math.min(thumbSliderCnt, pictEls-settings.thumbs); // upper index bound; don't slide too far left
					thumbSliderCnt *= -(thumbsWidth+settings.thumbsRightMargin); // scale index to pixels
					thumbSliderUl.animate({left: thumbSliderCnt}, settings.easeTime, settings.easeFunc, function() {authorityMixing();}); // animate thumbs ul
					pos = Math.ceil(z-settings.thumbs/2);
					pos = Math.min(pictEls-settings.thumbs, Math.max(0, pos)); // set index of leftmost thumbnail (relation to thumbSliderCnt??)
					// TODO merge this part with button clicks below
				}
				return true;
			}
			
			var XXX = j;
			// Shift display by diff # of images
			function slideImage(diff)
			{
				z = jQuery(thumbSlider + " a.active").parent().prevAll().size(); // TODO use j
				return slideImageTo(z+diff);
			}
			
			// Keyboard controls
    	function keyboard(e)
    	{
    		if (e.keyCode == 39) // shift right
					slideImage(1);
				if (e.keyCode == 37) // shift left
					slideImage(-1);
			}
			if ($.browser.mozilla) { $(document).keypress(keyboard); }
			else { $(document).keydown(keyboard); }
			
			// shortcuts to +/- buttons
			var jQuerybtl = jQuery("a#left" + j);
			var jQuerybtr = jQuery("a#right" + j);
			
			// right/left
			jQuerybtr.bind("click", function(){
					pos = Math.min(pictEls-settings.thumbs, pos+settings.thumbs); // several higher or last, whichever is lower
					jQuery(this).prev().prev().find("ul:not(:animated)").animate({ left: -(thumbsWidth+settings.thumbsRightMargin)*pos}, 500, settings.easeFunc, function(){authorityMixing();});					
					return false;
			});
			jQuerybtl.bind("click", function(){	
					pos = Math.max(0, pos-settings.thumbs); // several lower or 0, whichever is higher
					jQuery(this).prev().find("ul:not(:animated)").animate({ left: -(thumbsWidth+settings.thumbsRightMargin)*pos}, 500, settings.easeFunc, function(){authorityMixing();});			
					return false;
			});						
			
			function authorityMixing()
			{
				if (pos >= pictEls - settings.thumbs) // right edge
					jQuerybtr.addClass("r_dis");
				else
					jQuerybtr.removeClass("r_dis");
					
				if (pos == 0) // left edge
					jQuerybtl.addClass("l_dis");
				else
					jQuerybtl.removeClass("l_dis");
			}
			
			//CSS	defs @ runtime
			var tBorder = settings.thumbsBorderWidth;
			var contBorder = settings.galBorderWidth;
			
			jQuery(".slideViewer a img").css({border: "0"});
			if(settings.typo)
					{
						jQuery(this).find("span.typo").each(function(z) {
							jQuery(this).css({marginTop: (pictHeight-jQuery(this).innerHeight()), opacity: settings.typoFullOpacity});
						});
					}
			jQuery("div#svwp"+ j).css({border: settings.galBorderWidth +"px solid "+settings.galBorderColor});
			
			jQuery("div#thumbSlider" + j).css({position: "relative", left: contBorder, top: settings.thumbsTopMargin+"px", width: settings.thumbs*thumbsWidth+((settings.thumbsRightMargin*settings.thumbs)-settings.thumbsRightMargin), height: thumbsHeight, textAlign: "center", overflow: "hidden", margin: "0 auto"});
			jQuery("div#thumbSlider" + j + " ul").css({width: (thumbsWidth*pictEls)+settings.thumbsRightMargin*pictEls, position: "relative", left: "0", top: "0"});
			jQuery("div#thumbSlider" + j + " ul li").css({marginRight: settings.thumbsRightMargin});
					
			jQuery("div#thumbSlider" + j).find("p.tmbrdr").css({width: (thumbsWidth-tBorder*2)+"px", height: (thumbsHeight-tBorder*2) +"px", top: -(thumbsHeight) +"px", border: settings.thumbsBorderWidth +"px solid "+settings.thumbsBorderColor, opacity: settings.thumbsBorderOpacity});			
			jQuery("div#thumbSlider" + j + " a:first p.tmbrdr").css({borderColor: settings.thumbsActiveBorderColor, opacity: settings.thumbsActiveBorderOpacity});
			
			var rbttLeftMargin = (pictWidth/2) + (jQuery("div#thumbSlider" + j).width()/2) + settings.thumbsRightMargin + contBorder;
			var lbttLeftMargin = (pictWidth/2) - (jQuery("div#thumbSlider" + j).width()/2) - (settings.buttonsWidth + settings.thumbsRightMargin) + contBorder;			
			var innerImgH = jQuery("a#right" + j + " span img").attr("height");
			
			jQuery("a#left" + j).css({display: "block", textAlign: "center", width: settings.buttonsWidth + "px" , height: thumbsHeight+"px",  margin: -(thumbsHeight-settings.thumbsTopMargin) +"px 0 0 "+lbttLeftMargin+"px", textDecoration: "none", lineHeight: thumbsHeight+"px", color: settings.buttonsTextColor});
			jQuery("a#right" + j).css({display: "block", textAlign: "center", width: settings.buttonsWidth + "px", height: thumbsHeight+"px" , margin: -(thumbsHeight) +"px 0 0 "+rbttLeftMargin+"px", textDecoration: "none", lineHeight: thumbsHeight+"px", color: settings.buttonsTextColor});			
			jQuery("a#left" + j + " span img").css({margin: Math.round((thumbsHeight/2)-(innerImgH/2))+"px 0 0 0"});
			jQuery("a#right" + j + " span img").css({margin: Math.round((thumbsHeight/2)-(innerImgH/2))+"px 0 0 0"});

			authorityMixing();
	
			if(settings.autoslide){
					
					var i = 1;
					
					jQuery("div#thumbSlider" + j).everyTime(settings.asTimer, "asld", function() {			
		  			jQuery(this).find("a").eq(i).trigger("click");
		  			if(i == 0)
		  			{
						pos = 0;
						jQuerybtl.addClass("l_dis");
						jQuery("div#thumbSlider" + j).find("ul:not(:animated)").animate({ left: -(thumbsWidth+settings.thumbsRightMargin)*pos}, 500, settings.easeFunc, function(){authorityMixing();});
		  			}
		  			else jQuerybtl.removeClass("l_dis");
		  			
						(i%settings.thumbs == 0)? jQuery(this).next().next().trigger("click") : null;
						(i < pictEls-1)?	i++ : i=0;		  			
					});		
					
					//stops autoslidemode	
					jQuery("a#right" + j).bind("mouseup", function(){ jQuery(this).prev().prev().stopTime("asld"); });
					jQuery("a#left" + j).bind("mouseup", function(){ jQuery(this).prev().stopTime("asld"); });
					jQuery("div#thumbSlider" + j + " a").bind("mouseup", function(){ jQuery(this).parent().parent().parent().stopTime("asld"); });
			}
			
			var uiDisplay = (settings.thumbsVis)? "block":"none";
			jQuery("div#thumbSlider" + j + ", a#left" + j + ", a#right" + j).wrapAll("<div style='width:"+ pictWidth +"px; display: "+uiDisplay+"' id='ui"+j+"'><\/div>");			
			jQuery("div#svwp"+ j + ", div#ui" + j).wrapAll("<div style='width:"+ pictWidth +"px'><\/div>");
			});
			(jQuery("div#thumbSlider" + j).width()+(settings.buttonsWidth*2) >= pictWidth)? alert("ALERT: THE THUMBNAILS SLIDER IS TOO WIDE! \nthumbsPercentReduction and/or buttonsWidth needs to be scaled down!") : null;
		j++;
  });	
};