/**
 * jQuery VGrid v0.1.6 - variable grid layout plugin
 *
 * Terms of Use - jQuery VGrid
 * under the MIT (http://www.opensource.org/licenses/mit-license.php) License.
 *
 * Copyright 2009-2010 xlune.com All rights reserved.
 * (http://blog.xlune.com/2009/09/jqueryvgrid.html)
 */
(function($)
{
	function makePos(self)
	{
		var _childs = self.data("_vgchild");
		var _width = self.width();
		var _matrix = [[0,_width,0]];
		var _hmax=0, _c, _size, _point;
		_childs.each(function(i)
		{
			_c = $(this);
			_size = getSize(_c);
			_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]);
		});
		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)
	{
		if(!a || !b) return 0;
		return ((a[2] == b[2] && a[0] > b[0]) || a[2] > b[2]) ? 1 : -1;
	};
	function matrixSortX(a, b)
	{
		if(!a || !b) return 0;
		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("margin-right").replace('px', ''))
				+Number(child.css("padding-right").replace('px', ''))
				+Number(child.get(0).style.borderRightWidth.replace('px', ''));
		_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("margin-bottom").replace('px', ''))
				+Number(child.css("padding-bottom").replace('px', ''))
				+Number(child.get(0).style.borderBottomWidth.replace('px', ''));
		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)
	{
		var _c;
		childs.each(function(i)
		{
			_c = $(this);
			_c.css("left", ~~_c.data("_vgleft")+"px");
			_c.css("top", ~~_c.data("_vgtop")+"px");
		});
	};
	function animateTo(childs, easing, time, delay)
	{
		var _self = $(childs).parent();
		var isMove = false;
		var imax = childs.length;
		var i,_c,_pos;
		for(i=0; i<imax; i++)
		{
			_c = $(childs[i]);
			_pos = _c.position();
			if(_pos.left != _c.data("_vgleft") && _pos.top != _c.data("_vgtop"))
			{
				isMove = true;
			}
		}
		if(isMove)
		{
			if(typeof(_self.data("_vgopt").onStart) == "function") _self.data("_vgopt").onStart();
			childs.each(function(i)
			{
				var _c = $(this);
				var _opt = {
					duration: time,
					easing: easing
				};
				if(childs.size()-1 == i)
				{
					_opt.complete = _self.data("_vgopt").onFinish || null;
				}
				clearTimeout(_c.data("_vgtimeout"));
				_c.data("_vgtimeout", setTimeout(function(){
					_c.animate(
						{
							left: _c.data("_vgleft")+"px",
							top: _c.data("_vgtop")+"px"
						},
						_opt
					);
				}, 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
			);
		}, 500));
	};
	function setFontSizeListener(self, func)
	{
		var s = $("<span />")
			.text(" ")
			.attr("id", "_vgridspan")
			.hide()
			.appendTo("body");
		s.data("size", s.css("font-size"));
		s.data("timer", setInterval(function(){
			if(s.css("font-size") != s.data("size"))
			{
				s.data("size", s.css("font-size"));
				func(self);
			}
		}, 1000));
	};
	function setImgLoadEvent(self, func)
	{
		self.bind("vgrid-added", function(){
			self.find("img").bind("load", function(){
				func(self);
			});
		});
		self.trigger("vgrid-added");
		var _append = self.append;
		var _prepend = self.prepend;
		self.append = function(){
			_append.apply(self, arguments);
			self.trigger("vgrid-added");
		};
		self.prepend = function(){
			_prepend.apply(self, arguments);
			self.trigger("vgrid-added");
		};
	};
	$.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"));
			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);
			});
			if(_opt.useLoadImageEvent) setImgLoadEvent(_self, refleshHandler);
			if(_opt.useFontSizeListener) setFontSizeListener(_self, refleshHandler);
			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));
				_obj.data("_vgchild").each(function(num){
					$(this).appendTo(_obj);
				});
				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);