/* Ultimate Fade-in slideshow (v2.1)
* Last updated: Sept 10th, 2009. 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

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 != "") { //if at least one slide contains a description (feature is enabled)
   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')
     $(this).css({ visibility: 'hidden' })
    })
   }
   else { //display desc panel on demand (mouseover)
    setting.$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 })
  $slideimage.css({ marginTop: (imgdimensions[1] > 0 && imgdimensions[1] < setting.dimensions[1]) ? setting.dimensions[1] / 2 - imgdimensions[1] / 2 : 0 })
  setting.$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.$gallerylayers.eq(setting.fglayer).get(0), setting.curimage)
			 } catch (e) {
			  alert("Fade In Slideshow error: An error has occured somwhere in your code attached to the \"onslide\" event: " + e)
			 }
			 setting.currentstep += 1
			 if (setting.displaymode.type == "auto") {
			  if (setting.currentstep <= setting.totalsteps || setting.displaymode.cycles == 0)
			   setting.playtimer = setTimeout(function() { slideshow.showslide('next') }, setting.displaymode.pause)
			 }
			}) //end callback function
  setting.$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])
   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, showcontrol) {
  var setting = this.setting
  var endpoint = (state == "show") ? setting.dimensions[1] - setting.panelheight : this.setting.dimensions[1]
  setting.$descpanel.stop().animate({ top: endpoint }, fadeSlideShow_descpanel.slidespeed, function() {
   if (setting.descreveal == "always" && state == "hide")
    setting.$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=/"
 }
}