/*
 * jScroller 0.4 - Autoscroller PlugIn for jQuery
 *
 * Copyright (c) 2007 Markus Bordihn (http://markusbordihn.de)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * $Date: 2009-06-18 20:00:00 +0100 (Sat, 18 Jul 2009) $
 * $Rev: 0.4 $
 */

$jScroller = {

 info: {
  Name: "ByRei jScroller Plugin for jQuery",
  Version: 0.4,
  Author: "Markus Bordihn (http://markusbordihn.de)",
  Description: "Next Generation Autoscroller"
 },

 config: {
  obj : [],
  refresh: 120,
  regExp: {
   px: /([0-9,.\-]+)px/
  }
 },

 cache: {
  timer: 0,
  init: 0
 },

 add: function(parent,child,direction,speed,mouse) {
  if ($(parent).length && $(child).length && direction && speed >= 1) {
      $(parent).css({overflow: 'hidden'});
      $(child).css({position: 'absolute', left: 0, top: 0});
      /* Usability improvement by Nimrod Yonatan Ben-Nes, thanks Nimrod. */
      if (mouse) {
          $(child).hover(
            function(){
             $jScroller.pause($(child),true);
            },
            function(){
             $jScroller.pause($(child),false);
          });
      }
      $jScroller.config.obj.push({
                                  parent:    $(parent),
                                  child:     $(child),
                                  direction: direction,
                                  speed:     speed,
                                  pause:     false
       });
  }
 },

	pause: function(obj, status){
		if(obj && typeof status !== 'undefined'){
			for(var i in $jScroller.config.obj){
				if($jScroller.config.obj[i].child.attr("id") === obj.attr("id") || $jScroller.config.obj[i].child.attr("group") === obj.attr("group")){
					$jScroller.config.obj[i].pause = status;
				}
			}
		}
	},

 start: function() {
  if ($jScroller.cache.timer === 0 && $jScroller.config.refresh > 0) {
      $jScroller.cache.timer = window.setInterval($jScroller.scroll, $jScroller.config.refresh);
      //$jScroller.scroll();
  }
  if (!$jScroller.cache.init) {
      $(window).blur($jScroller.stop);
      $(window).focus($jScroller.start);
      $(window).resize($jScroller.start);
      $(window).scroll($jScroller.start);
      $(document).mousemove($jScroller.start);
      if ($.browser.msie) {window.focus();}
      $jScroller.cache.init = 1;
  }
 },

 stop: function() {
  if ($jScroller.cache.timer) {
      window.clearInterval($jScroller.cache.timer);
      $jScroller.cache.timer = 0;
  }
 },

 get: {
  px: function(value) {
   var result = '';
   if (value) {
       if (value.match($jScroller.config.regExp.px)) {
           if (typeof value.match($jScroller.config.regExp.px)[1] !== 'undefined') {
               result = value.match($jScroller.config.regExp.px)[1];
           }
       }
   }
   return result;
  }
 },

scroll: function(){
	if(!$jScroller.cache.groups){
		$jScroller.cache.groups = {};
		for(var i in $jScroller.config.obj){
			var obj = $jScroller.config.obj[i];
			var group = obj.child.attr('group') || 'random' + Math.ceil(Math.random());
			if(!$jScroller.cache.groups[group]){
				$jScroller.cache.groups[group] = [];
			}
			$jScroller.cache.groups[group].push(obj);
		}
	}
	
	for(var i in $jScroller.cache.groups){
		var group = $jScroller.cache.groups[i];
		var first = group[0];
		var second = group[1];
		if(!first.pause || !second.pause){
			var 
				first_top        = Number(($jScroller.get.px(first.child.css('top')) || 0)),
				first_min_height = first.parent.height(),
				first_height     = first.child.height();
				
			var
				second_top        = Number(($jScroller.get.px(second.child.css('top')) || 0)),
				second_min_height = second.parent.height(),
				second_height     = second.child.height();
			
			switch(first.direction){
				case 'up':
					if(first_top <= -1 * first_height){
                 		first_top = 0;
                 		if(!second.freeze){
                 			first.child.css('padding-top', second.child.css('padding-top'));
                 			second.child.css('padding-top', '0px');
                 			second.freeze = true;
                 		}else{
                 			second.freeze = false;
                 			second.child.css('padding-top', first.child.css('padding-top'));
                 			first.child.css('padding-top', '0px');
						}
                 	}
					if(second_top <= -1 * second_height){
                 		second_top = 0;
                 	}
					if(!first.freeze) first.child.css('top', first_top - first.speed + 'px');
					second.child.css('top', second_top - second.speed + 'px');
					break;
			}
		}
	}
	
	/*for(var i in $jScroller.config.obj){
		if($jScroller.config.obj.hasOwnProperty(i)){
			var
            	obj        = $jScroller.config.obj[i],
            	left       = Number(($jScroller.get.px(obj.child.css('left'))||0)),
            	top        = Number(($jScroller.get.px(obj.child.css('top'))||0)),
            	min_height = obj.parent.height(),
            	min_width  = obj.parent.width(),
            	height     = obj.child.height(),
            	width      = obj.child.width();
				
			if(!obj.pause){
           		switch(obj.direction){
                	case 'up':
                 		if(top <= -1 * height){
                 			top = min_height;
                 		}
						obj.child.css('top',top - obj.speed + 'px');
					break;
					case 'right':
						if(left >= min_width){ left = -1 * width; }
						obj.child.css('left',left + obj.speed + 'px');
						break;
					case 'left':
						if(left <= -1 * width){left = min_width;}
						obj.child.css('left',left - obj.speed + 'px');
						break;
					case 'down':
						if(top >= min_height) {top = -1 * height;}
						obj.child.css('top',top + obj.speed + 'px');
						break;
				}
           }
		}
	}*/
}

};