/**
 * jQuery VGrid v0.1.2-mod / MIT License.
 * Modified by yu (http://datoka.jp/). 2009/12/09
 * ----------------------------------------------
 * 
 * jQuery VGrid v0.1.2 - variable grid layout plugin
 *
 * Terms of Use - jQuery VGrid
 * under the MIT (http://www.opensource.org/licenses/mit-license.php) License.
 *
 * Copyright 2009 xlune.com All rights reserved.
 * (http://blog.xlune.com/2009/09/jqueryvgrid.html)
 *
 */
(function($)
{
	function makePos(self, initpos) //mod (added initpos argument)
	{
		var _childs = self.data("_vgchild");
		var _width = self.width();
		
		/* ----- mod start ----- */
		var _bodyW = $(window).width();
		var _defW = self.data("_vgopt").gridDefWidth || 290 + 15 + 15 + 5;
		var _selRefGrid = self.data("_vgopt").selRefGrid || "#grid-wrapper div.x1";
		var _selFitWidth = self.data("_vgopt").selFitWidth || "#container";
		
		if ( $(_selRefGrid).get().length ) 
		{
			var _colW = getSize($(_selRefGrid).eq(0))[0]; //use _w only
		}
		else 
		{
			var _colW = _defW;
		}
		var _colWSum = Math.floor(_bodyW / _colW) * _colW;
		if ( $.isArray(_selFitWidth) ) 
		{
			for (var i=0; i<_selFitWidth.length; i++)
			{
				$(_selFitWidth[i]).width( _colWSum );
			}
		}
		else
		{
			$(_selFitWidth).width( _colWSum );
		}
		
		var _ofsL = 0;
		var _ofsT = (initpos) ? 2000 : 0;
		var _adjL = (initpos) ? 0.5 : 1;
		var _adjT = (initpos) ? 0.5 : 1;
		/* ----- mod end ----- */
		
		var _matrix = [[0,_width,0]];
		var _hmax=0;
		_childs.each(function(i)
		{
			var _c = $(this);
			var _size = getSize(_c);
			var _point = getAttachPoint(_matrix, _size[0]);
			_matrix = updateAttachArea(_matrix, _point, _size);
			_hmax = Math.max(_hmax, _point[1] + _size[1]);
			//_c.data("_vgleft", _point[0]);
			//_c.data("_vgtop", _point[1]);
			/* ----- mod start ----- */
			_c.data("_vgleft", Math.floor( (_point[0] + _ofsL) * _adjL) );
			_c.data("_vgtop", Math.floor( (_point[1] + _ofsT) * _adjT) );
			/* ----- mod end ----- */
		});
		self.data("_vgwrapheight", _hmax);
		heightTo(self);
	};
	function getAttachPoint(mtx, width)
	{
		var _mtx = mtx.concat([]).sort(matrixSortDepth);
		var _max = _mtx[_mtx.length-1][2];
		for(var i=0,imax=_mtx.length; i<imax; i++)
		{
			if(_mtx[i][2] >= _max) break;
			if(_mtx[i][1]-_mtx[i][0] >= width)
			{
				return [_mtx[i][0], _mtx[i][2]];
			}
		}
		return [0, _max];
	};
	function updateAttachArea(mtx, point, size)
	{
		var _mtx = mtx.concat([]).sort(matrixSortDepth);
		var _cell = [point[0], point[0]+size[0], point[1]+size[1]];
		for(var i=0,imax=_mtx.length; i<imax; i++)
		{
			if(_cell[0] <= _mtx[i][0] && _mtx[i][1] <= _cell[1])
			{
				delete _mtx[i];
			}
			else
			{
				_mtx[i] = matrixTrimWidth(_mtx[i], _cell);
			}
		}
		return matrixJoin(_mtx, _cell);
	};
	function matrixSortDepth(a, b)
	{
		return ((a[2] == b[2] && a[0] > b[0]) || a[2] > b[2]) ? 1 : -1;
	};
	function matrixSortX(a, b)
	{
		return (a[0] > b[0]) ? 1 : -1;
	};
	function matrixJoin(mtx, cell)
	{
		var _mtx = mtx.concat([cell]).sort(matrixSortX);
		var _mtx_join = [];
		for(var i=0,imax=_mtx.length; i<imax; i++)
		{
			if(!_mtx[i]) continue;
			if(_mtx_join.length > 0
				&& _mtx_join[_mtx_join.length-1][1] == _mtx[i][0]
				&& _mtx_join[_mtx_join.length-1][2] == _mtx[i][2])
			{
				_mtx_join[_mtx_join.length-1][1] = _mtx[i][1];
			}
			else
			{
				_mtx_join.push(_mtx[i]);
			}
		}
		return _mtx_join;
	};
	function matrixTrimWidth(a, b)
	{
		if(a[0] >= b[0] && a[0] < b[1] || a[1] >= b[0] && a[1] < b[1])
		{
			if(a[0] >= b[0] && a[0] < b[1])
			{
				a[0] = b[1];
			}
			else
			{
				a[1] = b[0];
			}
		}
		return a;
	};
	function getSize(child)
	{
		var _w = child.width();
		var _h = child.height();
		_w += Number(child.css("margin-left").replace('px', ''))
				+Number(child.css("padding-left").replace('px', ''))
				//+Number(child.get(0).style.borderLeftWidth.replace('px', ''))
				+Number(child.css("border-left-width").replace('px', '')) //mod
				+Number(child.css("margin-right").replace('px', ''))
				+Number(child.css("padding-right").replace('px', ''))
				//+Number(child.get(0).style.borderRightWidth.replace('px', ''));
				+Number(child.css("border-right-width").replace('px', '')) //mod
		_h += Number(child.css("margin-top").replace('px', ''))
				+Number(child.css("padding-top").replace('px', ''))
				//+Number(child.get(0).style.borderTopWidth.replace('px', ''))
				+Number(child.css("border-top-width").replace('px', '')) //mod
				+Number(child.css("margin-bottom").replace('px', ''))
				+Number(child.css("padding-bottom").replace('px', ''))
				//+Number(child.get(0).style.borderBottomWidth.replace('px', ''));
				+Number(child.css("border-bottom-width").replace('px', '')); //mod
		return [_w, _h];
	};
	function heightTo(self)
	{
		var _self = self;
		var _delay = _self.data("_vgchild").length
			* (_self.data("_vgopt").delay || 0)
			+ _self.data("_vgopt").time || 500;
		_self.stop();
		if(_self.height() < _self.data("_vgwrapheight"))
		{
			if($.browser.msie)
			{
				_self.height(_self.data("_vgwrapheight"));
			}
			else
			{
				_self.animate(
					{
						height: _self.data("_vgwrapheight")+"px"
					},
					(_self.data("_vgopt").time || 500),
					"easeOutQuart"
				);
			}
		}
		else
		{
			clearTimeout(_self.data("_vgwraptimeout"));
			_self.data("_vgwraptimeout", setTimeout(function(){
				if($.browser.msie)
				{
					_self.height(_self.data("_vgwrapheight"));
				}
				else
				{
					_self.animate(
						{
							height: _self.data("_vgwrapheight")+"px"
						},
						(_self.data("_vgopt").time || 500),
						"easeOutQuart"
					);
				}
			}, _delay));
		}
	};
	function moveTo(childs)
	{
		childs.each(function(i)
		{
			var _c = $(this);
			_c.css("left", _c.data("_vgleft")+"px");
			_c.css("top", _c.data("_vgtop")+"px");
		});
	};
	function animateTo(childs, easeing, time, delay)
	{
		childs.each(function(i)
		{
			var _c = $(this);
			clearTimeout(_c.data("_vgtimeout"));
			_c.data("_vgtimeout", setTimeout(function(){
				_c.animate({
					left: _c.data("_vgleft")+"px",
					top: _c.data("_vgtop")+"px"
				}, time, easeing);
			}, i * delay));
		});
	};
	function refleshHandler(tg)
	{
		var _self = tg;
		clearTimeout(_self.data("_vgtimeout"));
		makePos(_self);
		_self.data("_vgtimeout", setTimeout(function(){
			animateTo(
				_self.data("_vgchild"),
				_self.data("_vgopt").easeing || "linear",
				_self.data("_vgopt").time || 500,
				_self.data("_vgopt").delay || 0
			);
		}, 250));
	};
	$.fn.extend({
		vgrid: function(option)
		{
			var _self = $(this);
			var _opt = option || {};
			_self.data("_vgopt", _opt);
			_self.data("_vgchild", _self.find("> *"));
			_self.data("_vgdefchild", _self.data("_vgchild"));
			_self.css({
				"position": "relative",
				"width": "auto"
			});
			_self.data("_vgchild").css("position", "absolute");
			
			//makePos(_self);
			//moveTo(_self.data("_vgchild"));
			/* ----- mod start ----- */
			if(_self.data("_vgopt").forceAnim)
			{
				makePos(_self, true); // make init position
				moveTo(_self.data("_vgchild"));
				refleshHandler(_self); // animation
			}
			else {
				makePos(_self);
				moveTo(_self.data("_vgchild")); // no animation
			}
			/* ----- mod end ----- */
			
			if(_self.data("_vgopt").fadeIn)
			{
				var _prop = (typeof(_self.data("_vgopt").fadeIn)=='object')
								? _self.data("_vgopt").fadeIn
								: {time: _self.data("_vgopt").fadeIn} ;
				_self.data("_vgchild").each(function(i)
				{
					var _c = $(this);
					_c.css('display', 'none');
					setTimeout(function(){
						_c.fadeIn(_prop.time || 250);
					}, i * (_prop.delay || 0));
				});
			}
			$(window).resize(function(e)
			{
				refleshHandler(_self);
				setTimeout(function(){ refleshHandler(_self) }, 250); //refresh twice for IE, Fx
			});
			return _self;
		},
		vgrefresh: function(easeing, time, delay, func)
		{
			var _obj = $(this);
			if(_obj.data("_vgchild"))
			{
				_obj.data("_vgchild", _obj.find("> *"));
				_obj.data("_vgchild").css("position", "absolute");
				makePos(_obj);
				time = typeof(time)=="number" ? time : _obj.data("_vgopt").time || 500;
				delay = typeof(delay)=="number" ? delay : _obj.data("_vgopt").delay || 0;
				animateTo(
					_obj.data("_vgchild"),
					easeing || _obj.data("_vgopt").easeing || "linear",
					time,
					delay
				);
				if(typeof(func)=='function')
				{
					setTimeout(
						func,
						_obj.data("_vgchild").length * delay + time
					);
				}
			}
			return _obj;
		},
		vgsort: function(func, easeing, time, delay)
		{
			var _obj = $(this);
			if(_obj.data("_vgchild"))
			{
				_obj.data("_vgchild", _obj.data("_vgchild").sort(func));
				makePos(_obj);
				animateTo(
					_obj.data("_vgchild"),
					easeing || _obj.data("_vgopt").easeing || "linear",
					typeof(time)=="number" ? time : _obj.data("_vgopt").time || 500,
					typeof(delay)=="number" ? delay : _obj.data("_vgopt").delay || 0
				);
			}
			return _obj;
		}
	});
})(jQuery);