/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * 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 General Public License for more details.
 *
 * 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.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef __FREESTYLE_CHAIN_H__
#define __FREESTYLE_CHAIN_H__

/** \file blender/freestyle/intern/stroke/Chain.h
 *  \ingroup freestyle
 *  \brief Class to define a chain of viewedges.
 *  \author Stephane Grabli
 *  \date 09/01/2003
 */

#include "Curve.h"

#include "../view_map/ViewMap.h"

namespace Freestyle {

/*! Class to represent a 1D elements issued from the chaining process.
 *  A Chain is the last step before the Stroke and is used in the Splitting and Creation processes.
 */
class Chain : public Curve
{
protected:
	// tmp
	Id *_splittingId;
	FEdge *_fedgeB; // the last FEdge of the ViewEdge passed to the last call for push_viewedge_back().

public:
	/*! Defult constructor. */
	Chain() : Curve()
	{
		_splittingId = 0;
		_fedgeB = 0;
	}

	/*! Builds a chain from its Id. */
	Chain(const Id& id) : Curve(id)
	{
		_splittingId = 0;
		_fedgeB = 0;
	}

	/*! Copy Constructor */
	Chain(const Chain& iBrother) : Curve(iBrother)
	{
		_splittingId = iBrother._splittingId;
		_fedgeB = iBrother._fedgeB;
	}

	/*! Destructor. */
	virtual ~Chain() {
		// only the last splitted deletes this id
		if (_splittingId) {
			if (*_splittingId == _Id)
				delete _splittingId;
		}
	}

	/*! Returns the string "Chain" */
	virtual string getExactTypeName() const
	{
		return "Chain";
	}

	/*! Adds a ViewEdge at the end of the chain
	 *  \param iViewEdge
	 *    The ViewEdge that must be added.
	 *  \param orientation
	 *    The orientation with which this ViewEdge must be processed.
	 */
	void push_viewedge_back(ViewEdge *iViewEdge, bool orientation);

	/*! Adds a ViewEdge at the beginning of the chain
	 *  \param iViewEdge
	 *    The ViewEdge that must be added.
	 *  \param orientation
	 *    The orientation with which this ViewEdge must be processed.
	 */
	void push_viewedge_front(ViewEdge *iViewEdge, bool orientation);

	inline void setSplittingId(Id *sid)
	{
		_splittingId = sid;
	}

	inline Id *getSplittingId()
	{
		return _splittingId;
	}
};

} /* namespace Freestyle */

#endif // __FREESTYLE_CHAIN_H__