/* Continuous Reel Slideshow
* Created: Aug 18th, 2010 by DynamicDrive.com. This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

jQuery.noConflict()

function reelslideshow(options){
	var $=jQuery
	this.setting={displaymode:{type:'auto', pause:2000, cycles:2, pauseonmouseover:true}, orientation:'h', persist:!options.startFirstSlide, slideduration:500} //default settings
	jQuery.extend(this.setting, options) //merge default settings with options
	var curslide=(this.setting.persist)? reelslideshow.routines.getCookie("slider-"+this.setting.slideshowID) : 0
	this.curslide=(curslide==null || curslide>this.setting.imagearray.length-1)? 0 : parseInt(curslide) //make sure curslide index is within bounds
	this.curstep=0
	this.zIndex=1
	this.animation_isrunning=false //variable to indicate whether an image is currently being slided in
	this.posprop=(this.setting.orientation=="h")? "left" : "top"
	options=null
	var slideshow=this, setting=this.setting, preloadimages=[], slidesHTML='', filmStripHTML=''
	for (var i=0; i<setting.imagearray.length; i++){ //preload images
		preloadimages[i]=new Image()
		preloadimages[i].src=setting.imagearray[i][0]
		slidesHTML+=reelslideshow.routines.getSlideHTML(setting.imagearray[i], setting.dimensions[0]+'px', setting.dimensions[1]+'px', this.posprop, false)+'\n'
		filmStripHTML+=reelslideshow.routines.getSlideHTML(setting.imagearray[i], setting.filmStripDimensions[0]+'px', setting.filmStripDimensions[1]+'px', this.posprop, true, i)+'\n'
	}
	jQuery(function($){ //on document.ready
		slideshow.init($, slidesHTML, filmStripHTML)
	})
	$(window).bind('unload', function(){ //on window onload
		/*if (slideshow.setting.persist)*/ //remember last shown slide's index?
			reelslideshow.routines.setCookie("slider-"+setting.slideshowID, slideshow.curslide)
	})
}

reelslideshow.prototype={

	slide:function(nextslide, dir){ //possible values for dir: "left", "right", "top", or "down"
		var $=jQuery
		if (this.curslide==nextslide)
			return
		var slider=this
		var nextslide_initialpos=this.setting.dimensions[(dir=="right"||dir=="left")? 0 : 1] * ((dir=="right"||dir=="down")? -1 : 1)
		var curslide_finalpos=-nextslide_initialpos
		var posprop=this.posprop
		if (this.animation_isrunning!=null)
			this.animation_isrunning=true //indicate animation is running
//		this.$imageslides.eq(dir=="left"||dir=="top"? nextslide : this.curslide).css("zIndex", ++this.zIndex) //increase zIndex of upcoming slide so it overlaps outgoing
//MJM - disabled to stop menus becoming covered
		this.$imageslides.eq(nextslide).css(reelslideshow.routines.createobj(['visibility', 'visible'], [posprop, nextslide_initialpos])) //show upcoming slide
			.animate(reelslideshow.routines.createobj([posprop, 0]), this.setting.slideduration, 'jswing', function(){slider.animation_isrunning=false})
		this.$imageslides.eq(this.curslide).animate(reelslideshow.routines.createobj([posprop, curslide_finalpos]), this.setting.slideduration, 'jswing', function(){jQuery(this).css("visibility", "hidden")}) //hide outgoing slide
		$('#thumb_' + this.curslide).removeClass('current_thumb')
		$('#thumb_' + nextslide).addClass('current_thumb')
		this.curslide=nextslide
	},

	navigate:function(keyword){ //keyword: "back" or "forth"
		clearTimeout(this.rotatetimer)
		var dir=(keyword=="back")? (this.setting.orientation=="h"? "right" : "down") : (this.setting.orientation=="h"? "left" : "up")
		var targetslide=(keyword=="back")? this.curslide-1 : this.curslide+1
		targetslide=(targetslide<0)? this.$imageslides.length-1 : (targetslide>this.$imageslides.length-1)? 0 : targetslide //wrap around
		if (this.animation_isrunning==false)
			this.slide(targetslide, dir)
	},

	navigateTo:function(targetslide){	//MJM
		if (targetslide==this.curslide) return
		var dir=(targetslide<this.curslide)? (this.setting.orientation=="h"? "right" : "down") : (this.setting.orientation=="h"? "left" : "up")
		if (this.animation_isrunning==false) {
			clearTimeout(this.rotatetimer)
			this.slide(targetslide, dir)
			var slideshow=this
			this.rotatetimer=setTimeout(function(){slideshow.rotate()}, this.setting.displaymode.pause)
		}
	},

	rotate:function(){
		var slideshow=this
		if (this.ismouseover){ //pause slideshow onmouseover
			this.rotatetimer=setTimeout(function(){slideshow.rotate()}, this.setting.displaymode.pause)
			return
		}
		var nextslide=(this.curslide<this.$imageslides.length-1)? this.curslide+1 : 0
		this.slide(nextslide, this.posprop) //go to next slide, either to the left or upwards depending on setting.orientation setting
		if (this.setting.displaymode.cycles==0 || this.curstep<this.maxsteps-1){
			this.rotatetimer=setTimeout(function(){slideshow.rotate()}, this.setting.displaymode.pause)
			this.curstep++
		}
	},

	init:function($, slidesHTML, filmStripHTML){
		var slideshow=this, setting=this.setting
		this.$wrapperdiv=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}) //main DIV
		if (this.$wrapperdiv.length==0){ //home page - look for filmStrip
			alert("Error: DIV with ID \""+setting.wrapperid+"\" not found on page.")
			return
		}
		this.$wrapperdiv.html(slidesHTML)
		if (setting.filmStripid) {
			this.$filmStripDiv=$('#'+setting.filmStripid).css({position:'relative', visibility:'visible', overflow:'hidden', height:setting.filmStripDimensions[1]+6}) //filmStrip DIV
			if (this.$filmStripDiv.length>0){
				this.$filmStripDiv.html(filmStripHTML)
			}
		}
		this.$imageslides=this.$wrapperdiv.find('div.slide')
		this.$imageslides.eq(this.curslide).css(reelslideshow.routines.createobj([this.posprop, 0])) //set current slide's CSS position (either "left" or "top") to 0
		$('#thumb_' + this.curslide).addClass('current_thumb')
		if (this.setting.displaymode.type=="auto"){ //auto slide mode?
			this.setting.displaymode.pause+=this.setting.slideduration
			this.maxsteps=this.setting.displaymode.cycles * this.$imageslides.length
			if (this.setting.displaymode.pauseonmouseover){
				this.$wrapperdiv.mouseenter(function(){slideshow.ismouseover=true})
				this.$wrapperdiv.mouseleave(function(){slideshow.ismouseover=false})
			}
			this.rotatetimer=setTimeout(function(){slideshow.rotate()}, this.setting.displaymode.pause)
		}
	}

}

reelslideshow.routines={

	getSlideHTML:function(imgref, w, h, posprop, filmStrip, i){
		if (filmStrip) {
			layerHTML = '<a href="#" onclick="firstreel.navigateTo('+i+'); return false;">'
			position = ""
			imgDims = 'width:'+w+';height:'+h+';'
			dw = parseInt(w) + 4
			dh = parseInt(h) + 4
			divDims = 'width:'+dw+'px;height:'+dh+'px;'
			posstr = ''
			id = 'id="thumb_'+i+'"'
			layerHTML+='<img '+id+' src="'+imgref[2]+'" style="'+imgDims+' float:none; margin:0px;" />'
		} else {
			layerHTML=(imgref[1])? '<a href="'+imgref[1]+'">' : '' //hyperlink slide?
			position = "position:absolute;"
			imgDims = 'width:'+w+';height:'+h+';'
			divDims = 'width:'+w+';height:'+h+';'
			posstr=posprop+":"+((posprop=="left")? w : h)
			id = ''
			layerHTML+='<img '+id+' src="'+imgref[0]+'" style="'+imgDims+' float:none; margin:0px;" />'
		}
		layerHTML+=(imgref[1] || filmStrip)? '</a>' : ''
		return '<div class="slide" style="'+position+posstr+';'+divDims+'text-align:center;">'
			+'<div style="'+divDims+'display:table-cell;vertical-align:middle;">'
			+layerHTML
			+'</div></div>' //return HTML for this layer
	},


	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=/"
	},

	createobj:function(){
		var obj={}
		for (var i=0; i<arguments.length; i++){
			obj[arguments[i][0]]=arguments[i][1]
		}
		return obj
	}
}