// Copyright (c) 1997  Tel-Aviv University (Israel).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you may redistribute it under
// the terms of the Q Public License version 1.0.
// See the file LICENSE.QPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// 
//
// Author(s)     : Eti Ezra          <estere@post.tau.ac.il>
#ifndef CGAL_HOLES_SPLIT_NOTIFIER_H
#define CGAL_HOLES_SPLIT_NOTIFIER_H   


CGAL_BEGIN_NAMESPACE         

template <class Planar_map_>
class Holes_split_notifier : public Planar_map_::Change_notification
{
public:
  typedef Planar_map_                                   Planar_map;
  typedef typename Planar_map::Halfedge_handle          Halfedge_handle;
  typedef typename Planar_map::Halfedge_const_handle    Halfedge_const_handle;
  
  typedef typename Planar_map::Traits                   Traits;
  typedef typename Traits::Point                        Point;
  typedef typename Traits::X_curve                      X_curve;
  
  Holes_split_notifier() : decomposing_(false) {}
  
  virtual ~Holes_split_notifier() {}
  
  // We assume the curves comes from the original triangles are
  // oriented counter clockwise.
  void add_edge(const X_curve& cv, 
                Halfedge_handle e, 
                bool left_to_right, 
                bool overlap = false)
  { 
    if (decomposing_){
      e->set_decomposing(true);
      e->twin()->set_decomposing(true);
    }
  }
 
  
  //---------------------------------------- new functions  
  
  void  set_decomposing_edge(bool decomposing) 
  { 
    decomposing_ = decomposing; 
  }

  bool  is_decomposing_edge() const { 
    return decomposing_; 
  }
  
private:
  bool  decomposing_;
};

CGAL_END_NAMESPACE

#endif