/*

* vertical news ticker

* Tadas Juozapaitis ( kasp3rito@gmail.com )

* http://www.jugbit.com/jquery-vticker-vertical-news-ticker/

*/

(function($){

$.fn.vTicker = function(options) {

	var defaults = {

		speed: 700,

		pause: 4000,

		showItems: 3,

		animation: '',

		mousePause: true,

		isPaused: false,

		direction: 'up',

		height: 0

	};



	var options = $.extend(defaults, options);



	moveUp = function(obj2, height, options){

		if(options.isPaused)

			return;

		

		var obj = obj2.children('ul');

		

    	var clone = obj.children('li:first').clone(true);

		

		if(options.height > 0)

		{

			height = obj.children('li:first').height();

		}		

		

    	obj.animate({top: '-=' + height + 'px'}, options.speed, function() {

        	$(this).children('li:first').remove();

        	$(this).css('top', '0px');

        });

		

		if(options.animation == 'fade')

		{

			obj.children('li:first').fadeOut(options.speed);

			if(options.height == 0)

			{

			obj.children('li:eq(' + options.showItems + ')').hide().fadeIn(options.speed).show();

			}

		}



    	clone.appendTo(obj);

	};

	

	moveDown = function(obj2, height, options){

		if(options.isPaused)

			return;

		

		var obj = obj2.children('ul');

		

    	var clone = obj.children('li:last').clone(true);

		

		if(options.height > 0)

		{

			height = obj.children('li:first').height();

		}

		

		obj.css('top', '-' + height + 'px')

			.prepend(clone);

			

    	obj.animate({top: 0}, options.speed, function() {

        	$(this).children('li:last').remove();

        });

		

		if(options.animation == 'fade')

		{

			if(options.height == 0)

			{

				obj.children('li:eq(' + options.showItems + ')').fadeOut(options.speed);

			}

			obj.children('li:first').hide().fadeIn(options.speed).show();

		}

	};

	

	return this.each(function() {

		var obj = $(this);

		var maxHeight = 0;



		obj.css({overflow: 'hidden', position: 'relative'})

			.children('ul').css({position: 'absolute', margin: 0, padding: 0})

			.children('li').css({margin: 0, padding: 0});



		if(options.height == 0)

		{

			obj.children('ul').children('li').each(function(){

				if($(this).height() > maxHeight)

				{

					maxHeight = $(this).height();

				}

			});



			obj.children('ul').children('li').each(function(){

				$(this).height(maxHeight);

			});



			obj.height(maxHeight * options.showItems);

		}

		else

		{

			obj.height(options.height);

		}

		

    	var interval = setInterval(function(){ 

			if(options.direction == 'up')

			{ 

				moveUp(obj, maxHeight, options); 

			}

			else

			{ 

				moveDown(obj, maxHeight, options); 

			} 

		}, options.pause);

		

		if(options.mousePause)

		{

			obj.bind("mouseenter",function(){

				options.isPaused = true;

			}).bind("mouseleave",function(){

				options.isPaused = false;

			});

		}

	});

};

})(jQuery);