// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#ifndef NL_MOVE_CELL_H
#define NL_MOVE_CELL_H

#include "nel/misc/types_nl.h"


namespace NLPACS
{

class CMoveElement;

/**
 * Move cell
 *
 * \author Cyril 'Hulud' Corvazier
 * \author Nevrax France
 * \date 2001
 */
class CMoveCell
{
public:

	/// Constructor
	CMoveCell();

	/// Update sorted lists for an element
	void linkFirstX (CMoveElement *element)
	{
		linkX (NULL, element, _FirstX);
	}

	/// Update sorted lists for an element
	void linkLastX (CMoveElement *element)
	{
		linkX (_LastX, element, NULL);
	}

	/*/// Update sorted lists for an element
	void linkFirstY (CMoveElement *element)
	{
		linkY (NULL, element, _FirstY);
	}

	/// Update sorted lists for an element
	void linkLastY (CMoveElement *element)
	{
		linkY (_LastY, element, NULL);
	}*/

	/// Update sorted lists for an element
	void updateSortedLists (CMoveElement *element, uint8 worldImage);

	// Link / unlink method
	void unlinkX (CMoveElement *element);

	// Link / unlink method
	//void unlinkY (CMoveElement *element);

	// Get first X
	CMoveElement	*getFirstX () const
	{
		return _FirstX;
	}

	// Get last X
	CMoveElement	*getLastX () const
	{
		return _LastX;
	}

	// Get root X
	CMoveElement		*getRootX ()
	{
		return _FirstX;
	}

private:

	// Link / unlink method
	void linkX (CMoveElement *previous, CMoveElement *element, CMoveElement *next);

	// Link / unlink method
	//void linkY (CMoveElement *previous, CMoveElement *element, CMoveElement *next);

	CMoveElement		*_FirstX;
	CMoveElement		*_LastX;
	/*CMoveElement		*_FirstY;
	CMoveElement		*_LastY;*/
};


} // NLPACS


#endif // NL_MOVE_CELL_H

/* End of move_cell.h */