// JavaScript Document
var totalNewsItemsPerSet = 3;
var currentNewsItemHighlighted = 0;
var currentNewsPage = 1;
var totalNewsPages = 3;
var startNewsIndex = 0;
var newsWidgetImagePath = "/wp-content/plugins/newsWidget/images/";
var newsRollOverAllowed = false;

var nextSetRange = totalNewsItemsPerSet*currentNewsPage;

var animationNwVectors = new Array();
animationNwVectors[0] = {elemForward:-356,elemBack:0,startTweetIndex:0};
animationNwVectors[1] = {elemForward:-712,elemBack:-356,startTweetIndex:3};
animationNwVectors[2] = {elemForward:-1068,elemBack:-712,startTweetIndex:6};

function newsOver(newsItemIndex){
	if(newsItemIndex != currentNewsItemHighlighted && newsRollOverAllowed == true){
		closeNewsItem(currentNewsItemHighlighted);
		openNewsItem(newsItemIndex);
		currentNewsItemHighlighted = newsItemIndex;
	}
}

var _nwAnimIn;
function slideNewsForward(){
	if(currentNewsPage < totalNewsPages){
		var _inAttributes = { 
		   left: { to: animationNwVectors[currentNewsPage-1].elemForward } 
		};
		_nwAnimIn = new YAHOO.util.Anim('newsWidgetTable', _inAttributes, .5, YAHOO.util.Easing.easeIn);
		_nwAnimIn.onComplete.subscribe(onNewsSlideIn);
		slideNewsIn();
		newsOver(animationNwVectors[currentNewsPage-1].startTweetIndex);
		newsRollOverAllowed = false;
		
		currentNewsItemHighlighted = animationNwVectors[currentNewsPage].startTweetIndex;
		
		i = document.getElementById('newsSet' + currentNewsPage);
		i.src = newsWidgetImagePath + "next_prev_set.gif";
		
		currentNewsPage++;
		i = document.getElementById('newsSet' + currentNewsPage);
		i.src = newsWidgetImagePath + "current_set.gif";
	}
}

function onNewsSlideIn(){
	newsRollOverAllowed = true;
}


function slideNewsBack(){
	if(currentNewsPage > 1){
		newsOver(animationNwVectors[currentNewsPage-1].startTweetIndex);
		newsRollOverAllowed = false;
		i = document.getElementById('newsSet' + currentNewsPage);
		i.src = newsWidgetImagePath + "next_prev_set.gif";
		currentNewsPage--;
		var _inAttributes = { 
		   left: { to: animationNwVectors[currentNewsPage-1].elemBack } 
		};
		_nwAnimIn = new YAHOO.util.Anim('newsWidgetTable', _inAttributes, .5, YAHOO.util.Easing.easeIn);
		_nwAnimIn.onComplete.subscribe(onNewsSlideIn);
		slideNewsIn();
		
		currentNewsItemHighlighted = animationNwVectors[currentNewsPage-1].startTweetIndex;
		
		
		i = document.getElementById('newsSet' + currentNewsPage);
		i.src = newsWidgetImagePath + "current_set.gif";
	}
}
  

function slideNewsIn(){
  _nwAnimIn.animate();
}

function newsWidgetInit() {
	MM_preloadImages(newsWidgetImagePath + 'cycle_left-over.gif',newsWidgetImagePath + 'cycle_right-over.gif',newsWidgetImagePath + 'see_all_news-over.gif');
	setTopNewsItem();
}

function openNewsItem(tweetId){
	var newsStyle = document.getElementById("newsWidg" + tweetId).style;
	newsStyle.backgroundColor = "#e9f3fa";
	newsStyle.height = "73px";
}

function closeNewsItem(newsWidgId){
	var newsStyle = document.getElementById("newsWidg" + newsWidgId).style;
	newsStyle.backgroundColor = "#D3E7F6";
	newsStyle.height = "20px";
}

function setTopNewsItem(){
	openNewsItem(0);
	openNewsItem(3);
	openNewsItem(6);
	newsRollOverAllowed = true;
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function launchNewsPage(newsUrl){
	var newWindow = window.open(newsUrl, '_blank');
	newWindow.focus();
}

YAHOO.util.Event.on('newsWidgetForward', 'click', slideNewsForward);
YAHOO.util.Event.on('newsWidgetBack', 'click', slideNewsBack);
YAHOO.util.Event.onDOMReady(newsWidgetInit);