/*
======================================================================
Pausing RSS scroller JavaScript engine- © Dynamic Drive (http://www.dynamicdrive.com)
Docs: http://www.dynamicdrive.com/dynamicindex17/rsspausescroller/
Last modified: March 16th, 2006.
Last modified by Prince Blessing Sunday: November 3rd, 2009
======================================================================
*/

//URL to "scrollerbridge.php" on your server:
var bridgepath="http://testlayer.com/newsmodule/publish/pbsscrollerbridge.php" //For the Main server
//var bridgepath="http://localhost/DW_NewsModule2.1/publish/pbsscrollerbridge.php" //For the local system, Pls use one at a time

//Advanced users: Edit below function to format the RSS feed output as desired
//formatrssmessage(divid, message_index_within_array, linktarget, logicswitch)

function formatrssmessage(divid, msgnumber, linktarget, logicswitch){
	var rsscontent=rsscontentdata[divid][msgnumber];
	//alert(rsscontentdata); alert(rsscontent);
	var linktitle='<span class="dwebrsstitle"><a href="'+unescape(rsscontent.link)+'" target="'+linktarget+'">'+unescape(rsscontent.title)+'</a></span>'
	var description='<div class="dwebrssdescription">'+unescape(rsscontent.description)+'</div>'
	var feeddate='<span class="dwebrssdate">'+unescape(rsscontent.date)+'</span>'
	if (logicswitch.indexOf("description")!=-1 && logicswitch.indexOf("date")!=-1) //Logic switch- Show description and date
		return linktitle+"<br />"+feeddate+description
	else if (logicswitch.indexOf("description")!=-1) //Logic switch- Show just description
		return linktitle+"<br />"+description
	else if (logicswitch.indexOf("author")!=-1 && logicswitch.indexOf("date")!=-1){
		//Logic switch- Show author and date
		var feedauthor=unescape(rsscontent.author);
		feedauthor = (feedauthor == '') ? "" : '<span class="dwebrsspostedby">Posted by '+feedauthor+'</span>';
		//little modification by Prince Blessing Sunday, libertylivingstone@yahoo.com, @ 2009, DW_NewsModule2.1
		var fulltitle = '';
		if ( unescape(rsscontent.description) != 'false' ){
			fulltitle = linktitle + "<br />"+feeddate+ "<br />" + feedauthor;
		}
		else {
			fulltitle = linktitle + feedauthor;
		}
		return fulltitle; //End of PBS Mod
	}
	else if (logicswitch.indexOf("date")!=-1) //Logic switch- Show just date
		return linktitle+"<br />"+feeddate
	else
		return linktitle //Default- Just return hyperlinked RSS title
}

//////NO NEED TO EDIT BEHIND HERE///////////////////////////

var rsscontentdata=new Array() //global array to hold RSS feeds contents

//rsspausescroller(RSS_id, divId, divClass, delay, linktarget, optionalswitch)

function rsspausescroller(RSS_id, divId, divClass, delay, linktarget, logicswitch){
	this.tickerid=divId //ID of ticker div to display information
	this.delay=delay //Delay between msg change, in miliseconds.
	this.linktarget=(typeof linktarget!="undefined")? linktarget : ""
	this.logicswitch=(typeof logicswitch!="undefined")? logicswitch : ""
	this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over scroller (and pause it if it is)
	this.hiddendivpointer=1 //index of message array for hidden div
	this.js_is_loaded=0
	this.number_of_tries=0
	
	//Other custom variables by Prince Blessing Sunday libertylivingstone@yahoo.com
	this.ckey = dweb_clientkey
	this.publishtemplate = dweb_publishtemplate
	this.publishonsite = dweb_publishonsite
	this.publishonsitepage = dweb_publishonsitepage
	//End of other private variables
	
	document.write(
				   '<div id="'+divId+'" class="'+divClass+'" style="position: relative; overflow: hidden"><div class="innerDiv" style="position: absolute; width: 100%;" id="'+divId+'1"><span style="position: absolute">...Retrieving Headlines...</span></div><div class="innerDiv" style="position: absolute; width: 100%; visibility: hidden" id="'+divId+'2"></div></div>'
				   )
	if (document.getElementById){ //perform basic DOM browser support
		var parameters = "rssid="+encodeURIComponent(RSS_id)+"&divid="+divId+"&ckey="+this.ckey+"&pbtpl="+this.publishtemplate+"&pbos="+this.publishonsite+"&pbosp="+this.publishonsitepage+"&bustcache="+new Date().getTime()
		//var dbug = bridgepath+"?"+parameters; alert(dbug + "\nLenght = " + dbug.length);
		rsspausescroller.getRSScontentJS(bridgepath+"?"+parameters)
		this.do_onjsload()
	}
}

// -------------------------------------------------------------------
// do_onjsload()- Checks if external JS containing RSS feed is loaded yet
// -If not, continue to check until yes, or abort after certain tries.
// -------------------------------------------------------------------

rsspausescroller.prototype.do_onjsload=function(){
	var scrollerinstance=this
	if (typeof rsscontentdata[this.tickerid]=="undefined" && this.number_of_tries<40){ //if JS array holding RSS content not yet loaded
	this.number_of_tries++
	setTimeout(function(){scrollerinstance.do_onjsload()}, 200) //recheck
	}
	else if (typeof rsscontentdata[this.tickerid]!="undefined"){ //if JS array has loaded
	this.tickerdiv=document.getElementById(this.tickerid)
	this.visiblediv=document.getElementById(this.tickerid+"1")
	this.hiddendiv=document.getElementById(this.tickerid+"2")
	this.visibledivtop=parseInt(rsspausescroller.getCSSpadding(this.tickerdiv))
	//set width of inner DIV to outer DIV width minus padding (padding assumed to be top padding x 2)
	this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px"
	this.visiblediv.innerHTML=formatrssmessage(this.tickerid, 0, this.linktarget, this.logicswitch)
	this.hiddendiv.innerHTML=formatrssmessage(this.tickerid, 1, this.linktarget, this.logicswitch)
	this.do_ondivsinitialized()
	}
	else
	document.getElementById(this.tickerid).innerHTML=rsscontentdata+"Content cannot be displayed at the moment."
}

// -------------------------------------------------------------------
// do_ondivsinitialized()- Checks if two divs of scroller is each populated with RSS message yet
// -If not, continue to check until yes, or abort after certain tries.
// -------------------------------------------------------------------

rsspausescroller.prototype.do_ondivsinitialized=function(){
	var scrollerinstance=this
	if (parseInt(this.visiblediv.offsetHeight)==0 || parseInt(this.hiddendiv.offsetHeight)==0)
	setTimeout(function(){scrollerinstance.do_ondivsinitialized()}, 100)
	else
	this.initialize()
}

// -------------------------------------------------------------------
// initialize()- Initialize scroller method.
// -Get div objects, set initial positions, start up down animation
// -------------------------------------------------------------------

rsspausescroller.prototype.initialize=function(){
	var scrollerinstance=this
	this.getinline(this.visiblediv, this.hiddendiv)
	this.hiddendiv.style.visibility="visible"
	//set width of inner DIVs to outer DIV's width minus padding (padding assumed to be top padding x 2)
	this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px"
	this.tickerdiv.onmouseover=function(){scrollerinstance.mouseoverBol=1}
	this.tickerdiv.onmouseout=function(){scrollerinstance.mouseoverBol=0}
	if (window.attachEvent) //Clean up loose references in IE
	window.attachEvent("onunload", function(){scrollerinstance.tickerdiv.onmouseover=scrollerinstance.tickerdiv.onmouseout=null})
	setTimeout(function(){scrollerinstance.animateup()}, this.delay)
}


// -------------------------------------------------------------------
// animateup()- Move the two inner divs of the scroller up and in sync
// -------------------------------------------------------------------


rsspausescroller.prototype.animateup=function(){
	var scrollerinstance=this
	if (parseInt(this.hiddendiv.style.top)>(this.visibledivtop+5)){
	this.visiblediv.style.top=parseInt(this.visiblediv.style.top)-5+"px"
	this.hiddendiv.style.top=parseInt(this.hiddendiv.style.top)-5+"px"
	setTimeout(function(){scrollerinstance.animateup()}, 50)
	}
	else{
	this.getinline(this.hiddendiv, this.visiblediv)
	this.swapdivs()
	setTimeout(function(){scrollerinstance.rotatemessage()}, this.delay)
	}
}

// -------------------------------------------------------------------
// swapdivs()- Swap between which is the visible and which is the hidden div
// -------------------------------------------------------------------

rsspausescroller.prototype.swapdivs=function(){
	var tempcontainer=this.visiblediv
	this.visiblediv=this.hiddendiv
	this.hiddendiv=tempcontainer
	}
	
	rsspausescroller.prototype.getinline=function(div1, div2){
	div1.style.top=this.visibledivtop+"px"
	div2.style.top=Math.max(div1.parentNode.offsetHeight, div1.offsetHeight)+"px"
}

// -------------------------------------------------------------------
// rotatemessage()- Populate the hidden div with the next message before it's visible
// -------------------------------------------------------------------

rsspausescroller.prototype.rotatemessage=function(){
	var scrollerinstance=this
	if (this.mouseoverBol==1) //if mouse is currently over scoller, do nothing (pause it)
	setTimeout(function(){scrollerinstance.rotatemessage()}, 100)
	else{
	var i=this.hiddendivpointer
	var ceiling=rsscontentdata[this.tickerid].length
	this.hiddendivpointer=(i+1>ceiling-1)? 0 : i+1
	this.hiddendiv.innerHTML=formatrssmessage(this.tickerid, this.hiddendivpointer, this.linktarget, this.logicswitch)
	this.animateup()
	}
}

// -------------------------------------------------------------------
// getRSScontentJS()- Fetch RSS feed as external JavaScript
// -------------------------------------------------------------------

rsspausescroller.getRSScontentJS=function(scripturl){
	var scriptref=document.createElement('script')
	scriptref.setAttribute("type","text/javascript")
	scriptref.setAttribute("src", scripturl)
	document.getElementsByTagName("head").item(0).appendChild(scriptref)
}


rsspausescroller.getCSSpadding=function(tickerobj){ //get CSS padding value, if any
	if (tickerobj.currentStyle)
	return tickerobj.currentStyle["paddingTop"]
	else if (window.getComputedStyle) //if DOM2
	return window.getComputedStyle(tickerobj, "").getPropertyValue("padding-top")
	else
	return 0
}