//** Accordion Content script: By Dynamic Drive, at http://www.dynamicdrive.com

//** Created: Jan 7th, 08'



//Version 1.3: April 3rd, 08':

//**1) Script now no longer conflicts with other JS frameworks

//**2) Adds custom oninit() and onopenclose() event handlers that fire when Accordion Content instance has initialized, plus whenever a header is opened/closed

//**3) Adds support for expanding header(s) using the URL parameter (ie: http://mysite.com/accordion.htm?headerclass=0,1)



//April 9th, 08': Fixed "defaultexpanded" setting not working when page first loads



//Version 1.4: June 4th, 08':

//**1) Added option to activate a header "mouseover" instead of the default "click"

//**2) Bug persistence not working when used with jquery 1.2.6



//Version 1.5: June 20th, 08':

//**1) Adds new "onemustopen:true/false" parameter, which lets you set whether at least one header should be open at all times (so never all closed).

//**2) Changed cookie path to site wide for persistence feature

//**3) Fixed bug so "expandedindices" parameter in oninit(headers, expandedindices) returns empty array [] instead of [-1] when no expanded headers found



//**1) Version 1.5.1: June 27th, 08': Fixed "defaultexpanded" setting not working properly when used with jquery 1.2.6



//Version 1.6: Oct 3rd, 08':

//**1) Adds new "mouseoverdelay" param that sets delay before headers are activated when "revealtype" param is set to "mouseover"

//**2) Fixed bug with "onemustopen" param not working properly when "revealtype" is set to "click"





var ddaccordion={

	

	contentclassname:{}, //object to store corresponding contentclass name based on headerclass



	expandone:function(headerclass, selected){ //PUBLIC function to expand a particular header

		this.toggleone(headerclass, selected, "expand")

	},



	collapseone:function(headerclass, selected){ //PUBLIC function to collapse a particular header

		this.toggleone(headerclass, selected, "collapse")

	},



	expandall:function(headerclass){ //PUBLIC function to expand all headers based on their shared CSS classname

		var $=jQuery

		var $headers=$('.'+headerclass)

		$('.'+this.contentclassname[headerclass]+':hidden').each(function(){

			$headers.eq(parseInt($(this).attr('contentindex'))).trigger("evt_accordion")

		})

	},



	collapseall:function(headerclass){ //PUBLIC function to collapse all headers based on their shared CSS classname

		var $=jQuery

		var $headers=$('.'+headerclass)

		$('.'+this.contentclassname[headerclass]+':visible').each(function(){

			$headers.eq(parseInt($(this).attr('contentindex'))).trigger("evt_accordion")

		})

	},



	toggleone:function(headerclass, selected, optstate){ //PUBLIC function to expand/ collapse a particular header

		var $=jQuery

		var $targetHeader=$('.'+headerclass).eq(selected)

		var $subcontent=$('.'+this.contentclassname[headerclass]).eq(selected)

		if (typeof optstate=="undefined" || optstate=="expand" && $subcontent.is(":hidden") || optstate=="collapse" && $subcontent.is(":visible"))

			$targetHeader.trigger("evt_accordion")
	},



	expandit:function($targetHeader, $targetContent, config, useractivated){

		ddaccordion.collapseall('toggler');

		$targetContent.slideDown(config.animatespeed, function(){config.onopenclose($targetHeader.get(0), parseInt($targetHeader.attr('headerindex')), $targetContent.css('display'), useractivated)})

		this.transformHeader($targetHeader, config, "expand")

	},



	collapseit:function($targetHeader, $targetContent, config, isuseractivated){

		$targetContent.slideUp(config.animatespeed, function(){config.onopenclose($targetHeader.get(0), parseInt($targetHeader.attr('headerindex')), $targetContent.css('display'), isuseractivated)})

		this.transformHeader($targetHeader, config, "collapse")

	},



	transformHeader:function($targetHeader, config, state){

		$targetHeader.addClass((state=="expand")? config.cssclass.expand : config.cssclass.collapse) //alternate btw "expand" and "collapse" CSS classes

		.removeClass((state=="expand")? config.cssclass.collapse : config.cssclass.expand)

		if (config.htmlsetting.location=='src'){ //Change header image (assuming header is an image)?

			$targetHeader=($targetHeader.is("img"))? $targetHeader : $targetHeader.find('img').eq(0) //Set target to either header itself, or first image within header

			$targetHeader.attr('src', (state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse) //change header image

		}

		else if (config.htmlsetting.location=="prefix") //if change "prefix" HTML, locate dynamically added ".accordprefix" span tag and change it

			$targetHeader.find('.accordprefix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)

		else if (config.htmlsetting.location=="suffix")

			$targetHeader.find('.accordsuffix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)

	},



	urlparamselect:function(headerclass){

		var result=window.location.search.match(new RegExp(headerclass+"=((\\d+)(,(\\d+))*)", "i")) //check for "?headerclass=2,3,4" in URL

		if (result!=null)

			result=RegExp.$1.split(',')

		return result //returns null, [index], or [index1,index2,etc], where index are the desired selected header indices

	},



	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=/"

	},



	init:function(config){

		//document.write('<style type="text/css">\n')
	
		//document.write('.'+config.contentclass+'{display: none}\n') //generate CSS to hide contents
	
		//document.write('<\/style>')
	
		//jQuery(document).ready(function($){
	
			ddaccordion.urlparamselect(config.headerclass)
	
			var persistedheaders=ddaccordion.getCookie(config.headerclass)
	
			ddaccordion.contentclassname[config.headerclass]=config.contentclass //remember contentclass name based on headerclass
	
			config.cssclass={collapse: config.toggleclass[0], expand: config.toggleclass[1]} //store expand and contract CSS classes as object properties
	
			config.revealtype=/^(click)|(mouseover)$/i.test(config.revealtype)? config.revealtype.replace(/mouseover/i, "mouseenter") : "click"
	
			config.htmlsetting={location: config.togglehtml[0], collapse: config.togglehtml[1], expand: config.togglehtml[2]} //store HTML settings as object properties
	
			config.oninit=(typeof config.oninit=="undefined")? function(){} : config.oninit //attach custom "oninit" event handler
	
			config.onopenclose=(typeof config.onopenclose=="undefined")? function(){} : config.onopenclose //attach custom "onopenclose" event handler
	
			var lastexpanded={} //object to hold reference to last expanded header and content (jquery objects)
	
			var expandedindices=ddaccordion.urlparamselect(config.headerclass) || ((config.persiststate && persistedheaders!=null)? persistedheaders : config.defaultexpanded)
	
			if (typeof expandedindices=='string') //test for string value (exception is config.defaultexpanded, which is an array)
	
				expandedindices=expandedindices.replace(/c/ig, '').split(',') //transform string value to an array (ie: "c1,c2,c3" becomes [1,2,3]
	
			var $subcontents=$('.'+config["contentclass"])
	
			if (expandedindices.length==1 && expandedindices[0]=="-1") //check for expandedindices value of [-1], indicating persistence is on and no content expanded
	
				expandedindices=[]
	
			if (config["collapseprev"] && expandedindices.length>1) //only allow one content open?
	
				expandedindices=[expandedindices.pop()] //return last array element as an array (for sake of jQuery.inArray())
	
			if (config["onemustopen"] && expandedindices.length==0) //if at least one content should be open at all times and none are, open 1st header
	
				expandedindices=[0]
	
			$('.'+config["headerclass"]).each(function(index){ //loop through all headers
	
				if (/(prefix)|(suffix)/i.test(config.htmlsetting.location) && $(this).html()!=""){ //add a SPAN element to header depending on user setting and if header is a container tag
	
					$('<span class="accordprefix"></span>').prependTo(this)
	
					$('<span class="accordsuffix"></span>').appendTo(this)
	
				}
	
				$(this).attr('headerindex', index+'h') //store position of this header relative to its peers
	
				$subcontents.eq(index).attr('contentindex', index+'c') //store position of this content relative to its peers
	
				var $subcontent=$subcontents.eq(index)
	
				var needle=(typeof expandedindices[0]=="number")? index : index+'' //check for data type within expandedindices array- index should match that type
	
				if (jQuery.inArray(needle, expandedindices)!=-1){ //check for headers that should be expanded automatically (convert index to string first)
	
					if (config.animatedefault==false)
	
						$subcontent.show()
	
					ddaccordion.expandit($(this), $subcontent, config, false) //Last Boolean value sets 'isuseractivated' parameter
	
					lastexpanded={$header:$(this), $content:$subcontent}
	
				}  //end check
	
				else{
	
					$subcontent.hide()
	
					config.onopenclose($(this).get(0), parseInt($(this).attr('headerindex')), $subcontent.css('display'), false) //Last Boolean value sets 'isuseractivated' parameter
	
					ddaccordion.transformHeader($(this), config, "collapse")
	
				}
	
			})
	
			$('.'+config["headerclass"]).bind("evt_accordion", function(){ //assign custom event handler that expands/ contacts a header
	
					var $subcontent=$subcontents.eq(parseInt($(this).attr('headerindex'))) //get subcontent that should be expanded/collapsed
	
					if ($subcontent.css('display')=="none"){
	
						ddaccordion.expandit($(this), $subcontent, config, true) //Last Boolean value sets 'isuseractivated' parameter
	
						if (config["collapseprev"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){ //collapse previous content?
	
							ddaccordion.collapseit(lastexpanded.$header, lastexpanded.$content, config, true) //Last Boolean value sets 'isuseractivated' parameter
	
						}
	
						lastexpanded={$header:$(this), $content:$subcontent}
	
					}
	
					else if (!config["onemustopen"] || config["onemustopen"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){
	
						ddaccordion.collapseit($(this), $subcontent, config, true) //Last Boolean value sets 'isuseractivated' parameter
	
					}
	
	 		})
	
			$('.'+config["headerclass"]).bind(config.revealtype, function(){
	
				if (config.revealtype=="mouseenter"){
	
					clearTimeout(config.revealdelay)
	
					var headerindex=parseInt($(this).attr("headerindex"))
	
					config.revealdelay=setTimeout(function(){ddaccordion.expandone(config["headerclass"], headerindex)}, config.mouseoverdelay || 0)
	
				}
	
				else{
	
					$(this).trigger("evt_accordion")
	
					return false //cancel default click behavior
	
				}
	
			})
	
			$('.'+config["headerclass"]).bind("mouseleave", function(){
	
				clearTimeout(config.revealdelay)
	
			})
	
			config.oninit($('.'+config["headerclass"]).get(), expandedindices)
	
			$(window).bind('unload', function(){ //clean up and persist on page unload
	
				$('.'+config["headerclass"]).unbind()
	
				var expandedindices=[]
	
				$('.'+config["contentclass"]+":visible").each(function(index){ //get indices of expanded headers
	
					expandedindices.push($(this).attr('contentindex'))
	
				})
	
				if (config.persiststate==true){ //persist state?
	
					expandedindices=(expandedindices.length==0)? '-1c' : expandedindices //No contents expanded, indicate that with dummy '-1c' value?
	
					ddaccordion.setCookie(config.headerclass, expandedindices)
	
				}
	
			})
	
		//})

	}

}