/* Ultimate Fade-in slideshow (v2.4)
* Last updated: May 24th, 2010. This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

//Oct 6th, 09' (v2.1): Adds option to randomize display order of images, via new option displaymode.randomize
//May 24th, 10' (v2.4): Adds new "peakaboo" option to "descreveal" setting. oninit and onslide event handlers added.

var fadeSlideShow_descpanel={
   controls: [['x.png',7,7], ['restore.png',10,11], ['loading.gif',54,55]], //full URL and dimensions of close, restore, and loading images
   fontStyle: 'normal 11px Verdana', //font style for text descriptions
   slidespeed: 200 //speed of description panel animation (in millisec)
}

//No need to edit beyond here...

//jQuery.noConflict()

function fadeSlideShow(settingarg){
   this.setting=settingarg
   settingarg=null
   var setting=this.setting
   setting.fadeduration=setting.fadeduration? parseInt(setting.fadeduration) : 500
   setting.curimage=(setting.persist)? fadeSlideShow.routines.getCookie("gallery-"+setting.wrapperid) : 0
   setting.curimage=setting.curimage || 0 //account for curimage being null if cookie is empty
   setting.currentstep=0 //keep track of # of slides slideshow has gone through (applicable in displaymode='auto' only)
   setting.totalsteps=setting.imagearray.length*(setting.displaymode.cycles>0? setting.displaymode.cycles : Infinity) //Total steps limit (applicable in displaymode='auto' only w/ cycles>0)
   setting.fglayer=0, setting.bglayer=1 //index of active and background layer (switches after each change of slide)
   setting.oninit=setting.oninit || function(){}
   setting.onslide=setting.onslide || function(){}
   if (setting.displaymode.randomize) //randomly shuffle order of images?
      setting.imagearray.sort(function() {return 0.5 - Math.random()})
   var preloadimages=[] //preload images
   setting.longestdesc="" //get longest description of all slides. If no desciptions defined, variable contains ""
   for (var i=0; i<setting.imagearray.length; i++){ //preload images
      preloadimages[i]=new Image()
      preloadimages[i].src=setting.imagearray[i][0]
      if (setting.imagearray[i][3] && setting.imagearray[i][3].length>setting.longestdesc.length)
         setting.longestdesc=setting.imagearray[i][3]
   }
   var closebutt=fadeSlideShow_descpanel.controls[0] //add close button to "desc" panel if descreveal="always"
   setting.closebutton=(setting.descreveal=="always")? '<img class="close" src="'+closebutt[0]+'" style="float:right;cursor:hand;cursor:pointer;width:'+closebutt[1]+'px;height:'+closebutt[2]+'px;margin-left:2px" title="Hide Description" />' : ''
   var slideshow=this
   jQuery(document).ready(function($){ //fire on DOM ready
      var setting=slideshow.setting
      var fullhtml=fadeSlideShow.routines.getFullHTML(setting.imagearray) //get full HTML of entire slideshow
      setting.$wrapperdiv=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:'black', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main slideshow DIV
      if (setting.$wrapperdiv.length==0){ //if no wrapper DIV found
         alert("Error: DIV with ID \""+setting.wrapperid+"\" not found on page.")
         return
      }
      setting.$gallerylayers=$('<div class="gallerylayer"></div><div class="gallerylayer"></div>') //two stacked DIVs to display the actual slide 
         .css({position:'absolute', left:0, top:0, width:'100%', height:'100%', background:'black'})
         .appendTo(setting.$wrapperdiv)
      var $loadingimg=$('<img src="'+fadeSlideShow_descpanel.controls[2][0]+'" style="position:absolute;width:'+fadeSlideShow_descpanel.controls[2][1]+';height:'+fadeSlideShow_descpanel.controls[2][2]+'" />')
         .css({left:setting.dimensions[0]/2-fadeSlideShow_descpanel.controls[2][1]/2, top:setting.dimensions[1]/2-fadeSlideShow_descpanel.controls[2][2]}) //center loading gif
         .appendTo(setting.$wrapperdiv)
      var $curimage=setting.$gallerylayers.html(fullhtml).find('img').hide().eq(setting.curimage) //prefill both layers with entire slideshow content, hide all images, and return current image
      if (setting.longestdesc!="" && setting.descreveal!="none"){ //if at least one slide contains a description (versus feature is enabled but no descriptions defined) and descreveal not explicitly disabled
         fadeSlideShow.routines.adddescpanel($, setting)
         if (setting.descreveal=="always"){ //position desc panel so it's visible to begin with
            setting.$descpanel.css({top:setting.dimensions[1]-setting.panelheight})
            setting.$descinner.click(function(e){ //asign click behavior to "close" icon
               if (e.target.className=="close"){
                  slideshow.showhidedescpanel('hide')
               }
            })
            setting.$restorebutton.click(function(e){ //asign click behavior to "restore" icon
               slideshow.showhidedescpanel('show')
               $(this).css({visibility:'hidden'})
            })
         }
         else if (setting.descreveal=="ondemand"){ //display desc panel on demand (mouseover)
            setting.$wrapperdiv.bind('mouseenter', function(){slideshow.showhidedescpanel('show')})
            setting.$wrapperdiv.bind('mouseleave', function(){slideshow.showhidedescpanel('hide')})
         }
      }
      setting.$wrapperdiv.bind('mouseenter', function(){setting.ismouseover=true}) //pause slideshow mouseover
      setting.$wrapperdiv.bind('mouseleave', function(){setting.ismouseover=false})
      if ($curimage.get(0).complete){ //accounf for IE not firing image.onload
         $loadingimg.hide()
         slideshow.paginateinit($)
         slideshow.showslide(setting.curimage)
      }
      else{ //initialize slideshow when first image has fully loaded
         $loadingimg.hide()
         slideshow.paginateinit($)
         $curimage.bind('load', function(){slideshow.showslide(setting.curimage)})
      }
      setting.oninit.call(slideshow) //trigger oninit() event
      $(window).bind('unload', function(){ //clean up and persist
         if (slideshow.setting.persist) //remember last shown image's index
            fadeSlideShow.routines.setCookie("gallery-"+setting.wrapperid, setting.curimage)
         jQuery.each(slideshow.setting, function(k){
            if (slideshow.setting[k] instanceof Array){
               for (var i=0; i<slideshow.setting[k].length; i++){
                  if (slideshow.setting[k][i].tagName=="DIV") //catches 2 gallerylayer divs, gallerystatus div
                     slideshow.setting[k][i].innerHTML=null
                  slideshow.setting[k][i]=null
               }
            }
         })
         slideshow=slideshow.setting=null
      })
   })
}

fadeSlideShow.prototype={

   navigate:function(keyword){
      var setting=this.setting
      clearTimeout(setting.playtimer)
      if (setting.displaymode.type=="auto"){ //in auto mode
         setting.displaymode.type="manual" //switch to "manual" mode when nav buttons are clicked on
         setting.displaymode.wraparound=true //set wraparound option to true
      }
      if (!isNaN(parseInt(keyword))){ //go to specific slide?
         this.showslide(parseInt(keyword))
      }
      else if (/(prev)|(next)/i.test(keyword)){ //go back or forth inside slide?
         this.showslide(keyword.toLowerCase())
      }
   },

   showslide:function(keyword){
      var slideshow=this
      var setting=slideshow.setting
      if (setting.displaymode.type=="auto" && setting.ismouseover && setting.currentstep<=setting.totalsteps){ //if slideshow in autoplay mode and mouse is over it, pause it
         setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.displaymode.pause)
         return
      }
      var totalimages=setting.imagearray.length
      var imgindex=(keyword=="next")? (setting.curimage<totalimages-1? setting.curimage+1 : 0)
         : (keyword=="prev")? (setting.curimage>0? setting.curimage-1 : totalimages-1)
         : Math.min(keyword, totalimages-1)
      var $slideimage=setting.$gallerylayers.eq(setting.bglayer).find('img').hide().eq(imgindex).show() //hide all images except current one
      var imgdimensions=[$slideimage.width(), $slideimage.height()] //center align image
      $slideimage.css({marginLeft: (imgdimensions[0]>0 && imgdimensions[0]<setting.dimensions[0])? setting.dimensions[0]/2-imgdimensions[0]/2 : 0})
      $slideimage.css({marginTop: (imgdimensions[1]>0 && imgdimensions[1]<setting.dimensions[1])? setting.dimensions[1]/2-imgdimensions[1]/2 : 0})
      if (setting.descreveal=="peekaboo" && setting.longestdesc!=""){ //if descreveal is set to "peekaboo", make sure description panel is hidden before next slide is shown
         clearTimeout(setting.hidedesctimer) //clear hide desc panel timer
         slideshow.showhidedescpanel('hide', 0) //and hide it immediately
      }
      setting.$gallerylayers.eq(setting.bglayer).css({zIndex:1000, opacity:0}) //background layer becomes foreground
         .stop().css({opacity:0}).animate({opacity:1}, setting.fadeduration, function(){ //Callback function after fade animation is complete:
            clearTimeout(setting.playtimer)
            try{
               setting.onslide.call(slideshow, setting.$gallerylayers.eq(setting.fglayer).get(0), setting.curimage)
            }catch(e){
               alert("Fade In Slideshow error: An error has occured somwhere in your code attached to the \"onslide\" event: "+e)
            }
            if (setting.descreveal=="peekaboo" && setting.longestdesc!=""){
               slideshow.showhidedescpanel('show')
               setting.hidedesctimer=setTimeout(function(){slideshow.showhidedescpanel('hide')}, setting.displaymode.pause-fadeSlideShow_descpanel.slidespeed)
            }  
            setting.currentstep+=1
            if (setting.displaymode.type=="auto"){
               if (setting.currentstep<=setting.totalsteps || setting.displaymode.cycles==0)
                  setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.displaymode.pause)
            }
         }) //end callback function
      setting.$gallerylayers.eq(setting.fglayer).css({zIndex:999}) //foreground layer becomes background
      setting.fglayer=setting.bglayer
      setting.bglayer=(setting.bglayer==0)? 1 : 0
      setting.curimage=imgindex
      if (setting.$descpanel){
         setting.$descpanel.css({visibility:(setting.imagearray[imgindex][3])? 'visible' : 'hidden'})
         if (setting.imagearray[imgindex][3]) //if this slide contains a description
            setting.$descinner.empty().html(setting.closebutton + setting.imagearray[imgindex][3])
      }
      if (setting.displaymode.type=="manual" && !setting.displaymode.wraparound){
         this.paginatecontrol()
      }
      if (setting.$status) //if status container defined
         setting.$status.html(setting.curimage+1 + "/" + totalimages)
   },

   showhidedescpanel:function(state, animateduration){
      var setting=this.setting
      var endpoint=(state=="show")? setting.dimensions[1]-setting.panelheight : this.setting.dimensions[1]
      setting.$descpanel.stop().animate({top:endpoint}, (typeof animateduration!="undefined"? animateduration : fadeSlideShow_descpanel.slidespeed), function(){
         if (setting.descreveal=="always" && state=="hide")
            setting.$restorebutton.css({visibility:'visible'}) //show restore button
      })
   },

   paginateinit:function($){
      var slideshow=this
      var setting=this.setting
      if (setting.togglerid){ //if toggler div defined
         setting.$togglerdiv=$("#"+setting.togglerid)
         setting.$prev=setting.$togglerdiv.find('.prev').data('action', 'prev')
         setting.$next=setting.$togglerdiv.find('.next').data('action', 'next')
         setting.$prev.add(setting.$next).click(function(e){ //assign click behavior to prev and next controls
            var $target=$(this)
            slideshow.navigate($target.data('action'))
            e.preventDefault()
         })
         setting.$status=setting.$togglerdiv.find('.status')
      }
   },

   paginatecontrol:function(){
      var setting=this.setting
         setting.$prev.css({opacity:(setting.curimage==0)? 0.4 : 1}).data('action', (setting.curimage==0)? 'none' : 'prev')
         setting.$next.css({opacity:(setting.curimage==setting.imagearray.length-1)? 0.4 : 1}).data('action', (setting.curimage==setting.imagearray.length-1)? 'none' : 'next')
         if (document.documentMode==8){ //in IE8 standards mode, apply opacity to inner image of link
            setting.$prev.find('img:eq(0)').css({opacity:(setting.curimage==0)? 0.4 : 1})
            setting.$next.find('img:eq(0)').css({opacity:(setting.curimage==setting.imagearray.length-1)? 0.4 : 1})
         }
   }

   
}

fadeSlideShow.routines={

   getSlideHTML:function(imgelement){
      var layerHTML=(imgelement[1])? '<a href="'+imgelement[1]+'" target="'+imgelement[2]+'">\n' : '' //hyperlink slide?
      layerHTML+='<img src="'+imgelement[0]+'" style="border-width:0;" />\n'
      layerHTML+=(imgelement[1])? '</a>\n' : ''
      return layerHTML //return HTML for this layer
   },

   getFullHTML:function(imagearray){
      var preloadhtml=''
      for (var i=0; i<imagearray.length; i++)
         preloadhtml+=this.getSlideHTML(imagearray[i])
      return preloadhtml
   },

   adddescpanel:function($, setting){
      setting.$descpanel=$('<div class="fadeslidedescdiv"></div>')
         .css({position:'absolute', visibility:'hidden', width:'100%', left:0, top:setting.dimensions[1], font:fadeSlideShow_descpanel.fontStyle, zIndex:'1001'})
         .appendTo(setting.$wrapperdiv)
      $('<div class="descpanelbg"></div><div class="descpanelfg"></div>') //create inner nav panel DIVs
         .css({position:'absolute', left:0, top:0, width:setting.$descpanel.width()-8, padding:'4px'})
         .eq(0).css({background:'black', opacity:0.7}).end() //"descpanelbg" div
         .eq(1).css({color:'white'}).html(setting.closebutton + setting.longestdesc).end() //"descpanelfg" div
         .appendTo(setting.$descpanel)
      setting.$descinner=setting.$descpanel.find('div.descpanelfg')
      setting.panelheight=setting.$descinner.outerHeight()
      setting.$descpanel.css({height:setting.panelheight}).find('div').css({height:'100%'})
      if (setting.descreveal=="always"){ //create restore button
         setting.$restorebutton=$('<img class="restore" title="Restore Description" src="' + fadeSlideShow_descpanel.controls[1][0] +'" style="position:absolute;visibility:hidden;right:0;bottom:0;z-index:1002;width:'+fadeSlideShow_descpanel.controls[1][1]+'px;height:'+fadeSlideShow_descpanel.controls[1][2]+'px;cursor:pointer;cursor:hand" />')
            .appendTo(setting.$wrapperdiv)


      }
   },


   getCookie:function(Name){ 
      var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
      if (document.cookie.match(re)) //if cookie found
         return document.cookie.match(re)[0].split("=")[1] //return its value
      return null
   },

   setCookie:function(name, value){
      document.cookie = name+"=" + value + ";path=/"
   }
}