// JavaScript Document
var totalTweetsPerSet = 4;
var currentTweetHighlighted = 0;
var currentPage = 1;
var totalPages = 3;
var startIndex = 0;
var twitterImagePath = "/wp-content/plugins/twidget/images/";
var rollOverAllowed = false;

var nextSetRange = totalTweetsPerSet*currentPage;

var animationVectors = new Array();
animationVectors[0] = {elemForward:-356,elemBack:0,startTweetIndex:0};
animationVectors[1] = {elemForward:-712,elemBack:-356,startTweetIndex:4};
animationVectors[2] = {elemForward:-1068,elemBack:-712,startTweetIndex:8};

function tweetOver(tweetIndex){
	if(currentTweetHighlighted != tweetIndex && rollOverAllowed == true){
		closeTweet(currentTweetHighlighted);
		openTweet(tweetIndex);
		currentTweetHighlighted = tweetIndex;
	}
}

var _animIn;
function slideTweetsForward(){
	if(currentPage < totalPages){
		var _inAttributes = { 
		   left: { to: animationVectors[currentPage-1].elemForward } 
		};
		tweetOver(animationVectors[currentPage-1].startTweetIndex);
		rollOverAllowed = false;
		currentTweetHighlighted = animationVectors[currentPage].startTweetIndex;
		
		i = document.getElementById('set' + currentPage);
		i.src = twitterImagePath + "next_prev_set.gif";
		
		currentPage++;
		i = document.getElementById('set' + currentPage);
		i.src = twitterImagePath + "current_set.gif"; 
		
		_animIn = new YAHOO.util.Anim('twitterTable', _inAttributes, .5, YAHOO.util.Easing.easeIn);
		_animIn.onComplete.subscribe(onSlideIn);
		slideIn();
	}
}

function onSlideIn(){
	rollOverAllowed = true;
}

function slideTweetsBack(){
	if(currentPage > 1){
		tweetOver(animationVectors[currentPage-1].startTweetIndex);
		rollOverAllowed = false;
		i = document.getElementById('set' + currentPage);
		i.src = twitterImagePath + "next_prev_set.gif";
		currentPage--;
		var _inAttributes = { 
		   left: { to: animationVectors[currentPage-1].elemBack } 
		};
		_animIn = new YAHOO.util.Anim('twitterTable', _inAttributes, .5, YAHOO.util.Easing.easeIn);
		_animIn.onComplete.subscribe(onSlideIn);
		slideIn();
		
		currentTweetHighlighted = animationVectors[currentPage-1].startTweetIndex;
		
		i = document.getElementById('set' + currentPage);
		i.src = twitterImagePath + "current_set.gif";
	}
}


function slideIn(){
  _animIn.animate();
}

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 openTweet(tweetId){
	var tweetStyle = document.getElementById("tweet" + tweetId).style;
	tweetStyle.backgroundColor = "#e9f3fa";
	tweetStyle.height = "73px";
}

function closeTweet(tweetId){
	var tweetStyle = document.getElementById("tweet" + tweetId).style;
	tweetStyle.backgroundColor = "#D3E7F6";
	tweetStyle.height = "20px";
}

function setTopTweet(){
	openTweet(0);
	openTweet(4);
	openTweet(8);
	rollOverAllowed = true;
}

function twitterWidgetInit() {
	MM_preloadImages(twitterImagePath + 'cycle_left-over.gif',twitterImagePath + 'cycle_right-over.gif',twitterImagePath + 'cycle_right-over.gif',twitterImagePath + 'see_all-over.gif');
	setTopTweet();
} 

YAHOO.util.Event.on('tweetWidgetForward', 'click', slideTweetsForward);
YAHOO.util.Event.on('tweetWidgetBack', 'click', slideTweetsBack);  
YAHOO.util.Event.onDOMReady(twitterWidgetInit);