/*
 *
 * 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(jQuery) {
/*
 * 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);
 *
 */
jQuery.fn.newsTicker = jQuery.fn.newsticker = function(delay)
{
	delay = delay || 6000;
	initTicker = function(el)
	{
		stopTicker(el);
		el.items = jQuery("li", el);
		el.items.not(":gt(2)").show().addClass('visible');
		el.currentloop = 0;
		el.maxloops = Math.ceil(el.items.length / 3);
		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;
		// hide current item

        el.currentloop = ++el.currentloop % (el.maxloops);

        var nextthree = '';
        for (i = 0; i <= 2; i++) {
            j = el.currentloop * 3 + i;
            if (jQuery(el.items.eq(j)).length > 0) {
                if (nextthree == '') {
                    nextthree = '.'+ jQuery(el).attr('class') +' li:eq('+j+')';
                } else {
                    nextthree = nextthree +', .'+ jQuery(el).attr('class') +' li:eq('+j+')';
                }
            }
        }

        jQuery('.'+ jQuery(el).attr('class') +' li.visible').fadeOut("slow", function() {
            jQuery(this).hide().removeClass('visible');

            jQuery(nextthree).fadeIn("slow", function() {
                jQuery(this).addClass('visible');
                el.pause = false;
            });
        });
/*
		jQuery(el.items[el.currentitem]).fadeOut("slow",
			function()
			{
				jQuery(this).hide();
				// move to next item and show
				el.currentitem = ++el.currentitem % (el.items.size());
				jQuery(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);