/*
 * 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.
 */

#pragma once

/** \file
 * \ingroup freestyle
 * \brief Class to visit (without doing anything) a scene graph structure
 */

#include "../system/FreestyleConfig.h"

#ifdef WITH_CXX_GUARDEDALLOC
#  include "MEM_guardedalloc.h"
#endif

namespace Freestyle {

#define VISIT_COMPLETE_DEF(type) \
  virtual void visit##type(type &) \
  { \
  } \
  virtual void visit##type##Before(type &) \
  { \
  } \
  virtual void visit##type##After(type &) \
  { \
  }

#define VISIT_DECL(type) virtual void visit##type(type &)

#define VISIT_COMPLETE_DECL(type) \
  virtual void visit##type##Before(type &); \
  virtual void visit##type(type &); \
  virtual void visit##type##After(type &)

class Node;
class NodeShape;
class NodeGroup;
class NodeLight;
class NodeCamera;
class NodeDrawingStyle;
class NodeTransform;
class NodeViewLayer;

class Rep;
class LineRep;
class OrientedLineRep;
class TriangleRep;
class VertexRep;
class IndexedFaceSet;
class DrawingStyle;
class FrsMaterial;

class SceneVisitor {
 public:
  SceneVisitor()
  {
  }
  virtual ~SceneVisitor()
  {
  }

  virtual void beginScene()
  {
  }
  virtual void endScene()
  {
  }

  //
  // visitClass methods
  //
  //////////////////////////////////////////////

  VISIT_COMPLETE_DEF(Node)
  VISIT_COMPLETE_DEF(NodeShape)
  VISIT_COMPLETE_DEF(NodeGroup)
  VISIT_COMPLETE_DEF(NodeLight)
  VISIT_COMPLETE_DEF(NodeCamera)
  VISIT_COMPLETE_DEF(NodeDrawingStyle)
  VISIT_COMPLETE_DEF(NodeTransform)
  VISIT_COMPLETE_DEF(NodeViewLayer)

  VISIT_COMPLETE_DEF(Rep)
  VISIT_COMPLETE_DEF(LineRep)
  VISIT_COMPLETE_DEF(OrientedLineRep)
  VISIT_COMPLETE_DEF(TriangleRep)
  VISIT_COMPLETE_DEF(VertexRep)
  VISIT_COMPLETE_DEF(IndexedFaceSet)
  VISIT_COMPLETE_DEF(DrawingStyle)
  VISIT_COMPLETE_DEF(FrsMaterial)

#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:SceneVisitor")
#endif
};

} /* namespace Freestyle */