/*!
 * 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='/images/loading.gif' class='ldrgif' alt='loading...'/ >");  
});
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
    }, 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;
    var r_enabled = true;
    var l_enabled = true;
    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);
    container.each(function(i) {
      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>");            
      });
    
      jQuery("div#thumbSlider" + j + " a").each(function(z) {     
        jQuery(this).bind("click", function(){
          jQuery(this).find("p.tmbrdr").css({borderColor: settings.thumbsActiveBorderColor, opacity: settings.thumbsActiveBorderOpacity});
          jQuery(this).parent().parent().find("p.tmbrdr").not(jQuery(this).find("p.tmbrdr")).css({borderColor: settings.thumbsBorderColor, opacity: settings.thumbsBorderOpacity});
          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)});          
          return false;
        });
      });
      // shortcuts to +/- buttons
      var jQuerybtl = jQuery("a#left" + j); 
      var jQuerybtr = jQuery("a#right" + j);  
      
      // right/left       
      jQuerybtr.bind("click", function(){

          if (r_enabled) (pictEls-pos > settings.thumbs*2 || pictEls%settings.thumbs == 0)? pos += settings.thumbs : pos += pictEls % settings.thumbs;
          r_enabled = false;
          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(){ 
          if (l_enabled && pos!=0) (pictEls-pos > settings.thumbs || pictEls%settings.thumbs == 0)? pos -= settings.thumbs : pos -= pictEls % settings.thumbs;
          l_enabled = false;
          jQuery(this).prev().find("ul:not(:animated)").animate({ left: -(thumbsWidth+settings.thumbsRightMargin)*pos}, 500, settings.easeFunc, function(){authorityMixing();});      
          return false;
      });           
      
      function authorityMixing()
      {       
        
        //right btt
        (pos == pictEls-settings.thumbs) ? jQuerybtr.addClass("r_dis") : jQuerybtr.removeClass("r_dis");
        (pos == pictEls-settings.thumbs) ? r_enabled = false : r_enabled = true;
        //left btt
        (pos == 0) ? jQuerybtl.addClass("l_dis") : jQuerybtl.removeClass("l_dis");
        (pos == 0) ? l_enabled = false : l_enabled = true;
      }
      
      //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;
            l_enabled = false;
            jQuery("div#thumbSlider" + j).find("ul:not(:animated)").animate({ left: -(thumbsWidth+settings.thumbsRightMargin)*pos}, 500, settings.easeFunc, function(){authorityMixing();});
            }
            else l_enabled = true;
            
            (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).wrapAll("<div style='width:"+ pictWidth +"px; display: "+uiDisplay+"' id='ui"+j+"'><\/div>"); 
      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++;
  }); 
};