/*
======================================================================
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
Last modified by Prince Blessing Sunday: February 14th, 2010
======================================================================
*/

//URL to "scrollerbridge.php" on your server:
var bridgepath="http://testlayer.com/newsmodule/publish/displayheadlines.php" //For the Main server
//var bridgepath="http://localhost/NewsModule/publish/displayheadlines.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///////////////////////////

if (typeof rsscontentdata == "undefined"){
	var rsscontentdata = new Array(); //global array to hold RSS feeds contents
}

//rsspausescroller(rssOptions)
/*
clientkey				:	"1aa1d50d68f0c6731e1f1b4a5980f54334093797",
detailspage				:	"http://localhost/PbsX1/iIntegrate2/newsdetails.php",
displayelementid		:	"newsscroller1", 
displayelementclass		:	"dwebrssclass",
scrolldelay				:	3000,
linktarget				:	"_new",
extraitems				:	"date+author",
*/

function rsspausescroller(rssOptions){
	this.tickerid=rssOptions.displayelementid //ID of ticker div to display information
	this.delay=rssOptions.scrolldelay //Delay between msg change, in miliseconds.
	this.linktarget=(typeof rssOptions.linktarget!="undefined")? rssOptions.linktarget : ""
	this.logicswitch=(typeof rssOptions.extraitems!="undefined")? rssOptions.extraitems : ""
	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 = rssOptions.clientkey;
	this.detailspage = rssOptions.detailspage;
	this.displayelementid = rssOptions.displayelementid;
	this.displayelementclass = rssOptions.displayelementclass;
	//End of other private variables
	
	document.write(
		'<div id="'+this.displayelementid+'" class="'+this.displayelementclass+'" style="position: relative; overflow: hidden">' +
			'<div class="innerDiv" style="position: absolute; width: 100%;" id="'+this.displayelementid+'1">' +
				'<span style="position: absolute">...Retrieving Contents...</span>' +
			'</div>' + 
			'<div class="innerDiv" style="position: absolute; width: 100%; visibility: hidden" id="'+this.displayelementid+'2"></div>' +
		'</div>'
	)
	
	this.contenturl = '';
	var parameters = "ckey=" + this.ckey + "&displayid=" + this.displayelementid + "&dtpage=" + encodeURIComponent(this.detailspage) + 
							"&bustcache=" + new Date().getTime();
	this.contenturl = bridgepath + "?" + parameters;
	//document.write(this.contenturl); alert(this.contenturl + "\nLenght = " + this.contenturl.length);
	
	if (document.getElementById){
		//perform basic DOM browser support
		rsspausescroller.getRSScontentJS(this.contenturl);
		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<30){ 
		//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 {
		//var retrylink = '<a href="#" onclick="javascript: rsspausescroller.retryLoadingContent();" title="Retry">Retry</a>';
		var no_content_info = 
			'<div class="innerDiv" style="position: absolute; width: 100%;" id="'+this.tickerid+'1">' +
				'<span style="position: absolute">' +
					'<div style="text-align:center;line-height:20px;padding:5px 3px;" id="'+this.tickerid+'NoContentDiv">' +
						'Content cannot be displayed at the moment. Refresh the page to try again' +
					'</div>' +
				'</span>' +
			'</div>' + 
			'<div class="innerDiv" style="position: absolute; width: 100%; visibility: hidden" id="'+this.tickerid+'2"></div>';
		
		document.getElementById(this.tickerid).innerHTML = rsscontentdata + no_content_info;
		
		//Retry code by Prince Blessing Sunday (libertylivingstone@yahoo.com)
		this.number_of_tries = 0;
		setTimeout(function(){scrollerinstance.retryLoadingContent()}, 5000);
	}
}

// --------------------------------------------------------------------------------------------------
// retryLoadingContent()- Just a trial by Prince Blessing Sunday to attempt retrying after failure
// --------------------------------------------------------------------------------------------------

rsspausescroller.prototype.retryLoadingContent=function(){
	var scrollerinstance=this
	//alert(scrollerinstance.contenturl);
	var NCD = document.getElementById(scrollerinstance.tickerid + 'NoContentDiv');
	if (NCD){ NCD.innerHTML = '...Refreshing Content...'; }
	rsspausescroller.getRSScontentJS(scrollerinstance.contenturl);
	scrollerinstance.do_onjsload();
}

// -------------------------------------------------------------------
// 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
}