/*
 *
 * Copyright (c) 2006/2007 Sam Collett (http://www.texotela.co.uk)
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 * 
 * Version 2.0
 * Demo: http://www.texotela.co.uk/code/jquery/newsticker/
 *
 * $LastChangedDate$
 * $Rev$
 *
 */
 
(function($) {
/*
 * A basic news ticker.
 *
 * @name     newsticker (or newsTicker)
 * @param    delay      Delay (in milliseconds) between iterations. Default 4 seconds (4000ms)
 * @author   Sam Collett (http://www.texotela.co.uk)
 * @example  $("#news").newsticker(); // or $("#news").newsTicker(5000);
 *
 */
$.fn.newsTicker = $.fn.newsticker = function(type, delay)
{
	delay = delay || 8000;
	type = type || "fade";
	speed = 1500;
	
	initTicker = function(el)
	{
		stopTicker(el);
		el.items = $("li", el);
		// hide all items (except first one)
		el.items.not(":eq(0)").hide().end();
		//setup for sliding if needed
		if(type == "slide"){
		  $(el).css({overflow:"hidden"});
		  el.items.css({position:"absolute", top:0, left:0, width:"100%"});
		  if($(el).css('position') != "absolute"){
		    $(el).css({position:"relative"});
		  }
	  }
		// current item
		el.currentitem = 0;
		startTicker(el);
	};
	startTicker = function(el)
	{
		el.tickfn = setInterval(function() { doTick(el) }, delay)
	};
	stopTicker = function(el)
	{
		clearInterval(el.tickfn);
	};
	pauseTicker = function(el)
	{
		el.pause = true;
	};
	resumeTicker = function(el)
	{
		el.pause = false;
	};
	doTick = function(el)
	{
		// don't run if paused
		if(el.pause) return;
		// pause until animation has finished
		el.pause = true;
		
		//animate
		if(type == "slide"){ //slide
		  $(el.items[el.currentitem]).fadeOut("slow");
		  el.currentitem = ++el.currentitem % (el.items.size());
		  $(el.items[el.currentitem]).css({left:$(el).width()+"px"});
		  $(el.items[el.currentitem]).show();
		  $(el.items[el.currentitem]).animate({left:"0px"}, speed, "linear", function(){ el.pause = false });
		} else { //fade out then in
  		$(el.items[el.currentitem]).fadeOut("slow", function(){
			  $(this).hide();
			  el.currentitem = ++el.currentitem % (el.items.size());
				$(el.items[el.currentitem]).fadeIn("slow", function(){ el.pause = false });
			});
  	}
	};
	this.each(
		function()
		{
			if(this.nodeName.toLowerCase()!= "ul") return;
			initTicker(this);
		}
	)
	.addClass("newsticker")
	.hover(
		function()
		{
			// pause if hovered over
			pauseTicker(this);
		},
		function()
		{
			// resume when not hovered over
			resumeTicker(this);
		}
	);
	return this;
};

})(jQuery);