var bridgepath="Assets/Apis/LastRss/lastrss/scrollerbridge.php";
var regex=/<.+>/gi;
var empty='';
function formatrssmessage(divid, msgnumber, linktarget, logicswitch, isLinked)
{
    var linktitle;
    var rsscontent=rsscontentdata[divid][msgnumber];
    if(isLinked)
        linktitle='<span class="rsstitle"><a href="'+unescape(rsscontent.link)+'" target="'+linktarget+'">'+unescape(rsscontent.title).replace(regex,empty)+'</a></span>';
    else
        linktitle='<span class="rsstitle"><a href="javascript:">'+unescape(rsscontent.title).replace(regex,empty)+'</a></span>';
    var description='<div class="rssdescription">'+unescape(rsscontent.description).replace(regex,empty).substring(0,325)+' &hellip;</div>';
    var feeddate='<span class="rssdate">'+unescape(rsscontent.date)+'</span>';
    if (logicswitch.indexOf("description")!=-1 && logicswitch.indexOf("date")!=-1)
        return linktitle+"<br>"+feeddate+description;
    else if (logicswitch.indexOf("description")!=-1)
        return linktitle+"<br>"+description;
    else if (logicswitch.indexOf("date")!=-1)
        return linktitle+"<br>"+feeddate;
    else
        return linktitle;
}
var rsscontentdata=new Array(); //global array to hold RSS feeds contents
function rsspausescroller(RSS_id, divId, divClass, delay, linktarget, logicswitch, isLinked)
{
    this.isLinked=isLinked;
    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;
    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">Initializing RSS scroller...</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="id="+encodeURIComponent(RSS_id)+"&divid="+divId+"&bustcache="+new Date().getTime();
        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.isLinked);
        this.hiddendiv.innerHTML=formatrssmessage(this.tickerid, 1, this.linktarget, this.logicswitch, this.isLinked);
        this.do_ondivsinitialized();
    }
    else
        document.getElementById(this.tickerid).innerHTML=rsscontentdata+"<br>I give up trying to fetch RSS feed.";
}
// 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.isLinked);
        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);
}
//get CSS padding value, if any
rsspausescroller.getCSSpadding=function(tickerobj)
{
    if (tickerobj.currentStyle)
        return tickerobj.currentStyle["paddingTop"];
    else if (window.getComputedStyle) //if DOM2
        return window.getComputedStyle(tickerobj, "").getPropertyValue("padding-top");
    else
        return 0;
}