/*
 * $Revision: 2523 $
 *
 * last checkin:
 *   $Author: gutwenger $
 *   $Date: 2012-07-02 20:59:27 +0200 (Mon, 02 Jul 2012) $
 ***************************************************************/

/** \file
 * \brief Declaration of class EdgeAttributes.
 *
 * \author Stefan Hachul
 *
 * \par License:
 * This file is part of the Open Graph Drawing Framework (OGDF).
 *
 * \par
 * Copyright (C)<br>
 * See README.txt in the root directory of the OGDF installation for details.
 *
 * \par
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * Version 2 or 3 as published by the Free Software Foundation;
 * see the file LICENSE.txt included in the packaging of this file
 * for details.
 *
 * \par
 * 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 General Public License for more details.
 *
 * \par
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * \see  http://www.gnu.org/copyleft/gpl.html
 ***************************************************************/





#ifdef _MSC_VER
#pragma once
#endif

#ifndef OGDF_EDGE_ATTRIBUTES_H
#define OGDF_EDGE_ATTRIBUTES_H

#include "../../basic/geometry.h"
#include "../../basic/Graph.h"

namespace ogdf {


class OGDF_EXPORT EdgeAttributes
{
	//helping data structure that stores the graphical attributes of an edge
	//that are needed for the force-directed  algorithms.

	//outputstream for EdgeAttributes
	friend ostream &operator<< (ostream &,const EdgeAttributes &);

	//inputstream for EdgeAttributes
	friend istream &operator>> (istream &,EdgeAttributes &);

public:

	EdgeAttributes();       //constructor
	~EdgeAttributes() { }   //destructor

	void set_EdgeAttributes(double l, edge e_orig, edge e_sub)
	{
		length = l;
		e_original = e_orig;
		e_subgraph = e_sub;
	}

	void set_length(double l) { length = l; }
	double get_length() const { return length; }


	//needed for the divide et impera step in FMMM

	void set_original_edge (edge e) { e_original = e; }
	void set_subgraph_edge (edge e) { e_subgraph = e; }
	edge get_original_edge() const { return e_original; }
	edge get_subgraph_edge() const { return e_subgraph; }

	//needed for the preprocessing step in FMMM (set/get_original_edge are needed, too)

	void set_copy_edge (edge e) {e_subgraph = e;}
	edge get_copy_edge() const {return e_subgraph;}

	//needed for multilevel step

	void set_higher_level_edge (edge e) { e_subgraph = e; }
	edge get_higher_level_edge() const { return e_subgraph; }
	bool is_moon_edge() const { return moon_edge; }
	void make_moon_edge() { moon_edge = true; }
	bool is_extra_edge() const { return extra_edge; }
	void make_extra_edge() { extra_edge = true; }
	void mark_as_normal_edge() { extra_edge = false; }
	void init_mult_values() { e_subgraph = NULL; moon_edge = false; }

private:
	double length;
	edge e_original;
	edge e_subgraph;
	bool moon_edge; //indicates if this edge is associasted with a moon node
	bool extra_edge;//indicates if this edge is an extra edge that is added to
	//enforce few edge crossings
};

}//namespace ogdf
#endif