/* Ultimate Fade-in slideshow (v2.0)
* 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
*/

var fadeSlideShow_descpanel={
	controls: [['close.gif',66,16], ['open.gif',58,16], ['loading.gif',90,16]], //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
	
	//account for curimage being null if cookie is empty
	setting.curimage = setting.curimage || ((setting.start) ? parseInt(setting.start) : 0)
	
	//keep track of # of slides slideshow has gone through (applicable in displaymode='auto' only)
	setting.currentstep = 0
	
	//Total steps limit (applicable in displaymode='auto' only w/ cycles>0)
	setting.totalsteps = setting.imagearray.length * (setting.displaymode.cycles > 0 ? setting.displaymode.cycles : Infinity)
	
	//index of active and background layer (switches after each change of slide)
	setting.fglayer = 0
	setting.bglayer = 1
	
	setting.oninit = setting.oninit || function(){}
	setting.onslide = setting.onslide || function(){}
	
	// bgcolor
	setting.bgcolor = setting.bgcolor ? setting.bgcolor : 'white'
	
	//preload images
	var preloadimages=[]
	
	//get longest description of all slides. If no desciptions defined, variable contains ""
	setting.longestdesc = ""
	
	//preload images
	for (var i = 0; i < setting.imagearray.length; i++) {
		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]
		}
	}
	
	//add close button to "desc" panel if descreveal="always"
	var closebutt = fadeSlideShow_descpanel.controls[0]
	setting.closebutton = ''
	if (setting.descreveal == "always") {
		setting.closebutton = '<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
	
	//fire on DOM ready
	jQuery(document).ready(function($) {
		var setting = slideshow.setting
		
		//get full HTML of entire slideshow
		var fullhtml = fadeSlideShow.routines.getFullHTML(setting.imagearray)
		
		//main slideshow DIV
		setting.$wrapperdiv = $('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:setting.bgcolor, overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty()
		
		//if no wrapper DIV found
		if (setting.$wrapperdiv.length == 0) {
			alert("Error: DIV with ID \""+setting.wrapperid+"\" not found on page.")
			return
		}
		
		//two stacked DIVs to display the actual slide
		setting.$gallerylayers = $('<div class="gallerylayer"></div><div class="gallerylayer"></div>')
			.css({position:'absolute', left:0, top:0, width:'100%', height:'100%', background:setting.bgcolor})
			.appendTo(setting.$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)
		
		//prefill both layers with entire slideshow content, hide all images, and return current image
		var $curimage = setting.$gallerylayers.html(fullhtml).find('img').hide().eq(setting.curimage)
		
		//if at least one slide contains a description (feature is enabled)
		if (setting.longestdesc != "") {
			fadeSlideShow.routines.adddescpanel($, setting)
			
			//position desc panel so it's visible to begin with
			if (setting.descreveal == "always") {
				setting.$descpanel.css({top:setting.dimensions[1]-setting.panelheight})
				
				//assign click behavior to "close" icon
				setting.$descinner.click(function(e) {
					if (e.target.className=="close") {
						slideshow.showhidedescpanel('hide')
					}
				})
				
				//assign click behavior to "restore" icon
				setting.$restorebutton.click(function(e) {
					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')})
			}
		}
		
		//pause slideshow mouseover
		setting.$wrapperdiv.bind('mouseenter', function(){setting.ismouseover=true})
		setting.$wrapperdiv.bind('mouseleave', function(){setting.ismouseover=false})
		
		//accounf for IE not firing image.onload
		if ($curimage.get(0).complete){
			$loadingimg.hide()
			slideshow.paginateinit($)
			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)})
		}
		
		//trigger oninit() event
		setting.oninit.call(slideshow)
		
		//clean up and persist
		$(window).bind('unload', function() {
			//remember last shown image's index
			if (slideshow.setting.persist) {
				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++) {
						//catches 2 gallerylayer divs, gallerystatus div
						if (slideshow.setting[k][i].tagName == "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)
		
		//switch to "manual" mode when nav buttons are clicked on
		if (setting.displaymode.type == "auto") {
			setting.displaymode.type = "manual"
			setting.displaymode.wraparound = true
		}
		
		//go to specific slide?
		if (!isNaN(parseInt(keyword))) {
			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 slideshow in autoplay mode and mouse is over it, pause it
//		if (setting.displaymode.type == "auto" && setting.ismouseover && setting.currentstep <= setting.totalsteps) {
//			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)
		
		//hide all images except current one
		var $slideimage = setting.$gallerylayers.eq(setting.bglayer).find('img').hide().eq(imgindex).show()
		
		//center align image
		var imgdimensions = [$slideimage.width(), $slideimage.height()]
		//$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})
		
		//background layer becomes foreground
		setting.$gallerylayers.eq(setting.bglayer).css({zIndex:1000, opacity:0})
			.stop().css({opacity:0}).animate({opacity:1}, setting.fadeduration, function() { //Callback function after fade animation is complete:
				clearTimeout(setting.playtimer)
				try{
					setting.onslide.call(slideshow, setting.$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
			
		//foreground layer becomes background
		setting.$gallerylayers.eq(setting.fglayer).css({zIndex:999})
		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) {
			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()
			})
		}
		
		if (setting.previd) {
			setting.$prevdiv=$("#"+setting.previd)
			setting.$prev=setting.$prevdiv.find('.prev').data('action', 'prev')
			setting.$prev.click(function(e){ //assign click behavior to prev control
				var $target=$(this)
				slideshow.navigate($target.data('action'))
				e.preventDefault()
			})
		}
		
		if (setting.nextid) {
			setting.$nextdiv=$("#"+setting.nextid)
			setting.$next=setting.$nextdiv.find('.next').data('action', 'next')
			setting.$next.click(function(e){ //assign click behavior to next control
				var $target=$(this)
				slideshow.navigate($target.data('action'))
				e.preventDefault()
			})
		}
		
		if (setting.statusid) {
			setting.$statusdiv=$("#"+setting.statusid)
			setting.$status=setting.$statusdiv.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
	},

	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=/"
	}
}