/**
 * @license 
 * jQuery Tools @VERSION / Scrollable Autoscroll
 * 
 * NO COPYRIGHTS OR LICENSES. DO WHAT YOU LIKE.
 * 
 * http://flowplayer.org/tools/scrollable/autoscroll.html
 *
 * Since: September 2009
 * Date: @DATE 
 */
(function($) {          

        var t = $.tools.scrollable; 
        
        t.autoscroll = {
                
                conf: {
                        autoplay: true,
                        interval: 3000,
                        autopause: true
                }
        };      
        
        // jQuery plugin implementation
        $.fn.autoscroll = function(conf) { 

                if (typeof conf == 'number') {
                        conf = {interval: conf};        
                }
                
                var opts = $.extend({}, t.autoscroll.conf, conf), ret;
                
                this.each(function() {          
                                
                        var api = $(this).data("scrollable");                   
                        if (api) { ret = api; }
                        
                        // interval stuff
                        var timer, hoverTimer, stopped = true;
        
                        api.play = function() {
        
                                // do not start additional timer if already exists
                                if (timer) { return; }
                                
                                stopped = false;
                                
                                // construct new timer
                                timer = setInterval(function() { 
                                        api.next();                             
                                }, opts.interval);
                                
                                api.next();
                        };      

                        api.pause = function() {
                                timer = clearInterval(timer);   
                        };
                        
                        // when stopped - mouseover won't restart 
                        api.stop = function() {
                                api.pause();
                                stopped = true; 
                        };
                
                        /* when mouse enters, autoscroll stops */
                        if (opts.autopause) {
                                api.getRoot().add(api.getNaviButtons()).hover(function() {                      
                                        api.pause();
                                        clearInterval(hoverTimer);
                                        
                                }, function() {
                                        if (!stopped) {                                         
                                                hoverTimer = setTimeout(api.play, opts.interval);                                               
                                        }
                                });
                        }                       
                        
                        if (opts.autoplay) {
                                setTimeout(api.play, opts.interval);                            
                        }

                });
                
                return opts.api ? ret : this;
                
        }; 
        
})(jQuery);