
/*

  KLayout Layout Viewer
  Copyright (C) 2006-2020 Matthias Koefferlein

  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 St, Fifth Floor, Boston, MA  02110-1301  USA

*/


#ifndef HDR_dbWriter
#define HDR_dbWriter

#include "dbCommon.h"

#include "tlException.h"
#include "dbSaveLayoutOptions.h"

namespace tl 
{
  class OutputStream;
  class OutputStreamBase;
}

namespace db
{

class Layout;

/**
 *  @brief The generic writer base class
 */
class DB_PUBLIC WriterBase
{
public:
  /**
   *  @brief Constructor
   */
  WriterBase () { }

  /**
   *  @brief Destructor
   */
  virtual ~WriterBase () { }

  /**
   *  @brief Actually write the layout
   *  The layout is non-const since the writer may modify the meta information of the layout.
   */
  virtual void write (db::Layout &layout, tl::OutputStream &stream, const db::SaveLayoutOptions &options) = 0;
};

/**
 *  @brief A generic stream format writer
 */
class DB_PUBLIC Writer
{
public:
  typedef std::vector<MetaInfo> meta_info;
  typedef meta_info::const_iterator meta_info_iterator;

  /**
   *  @brief The constructor
   */
  Writer (const SaveLayoutOptions &options);

  /**
   *  @brief The destructor
   */
  ~Writer ();

  /**
   *  @brief The generic write method
   *  The layout is non-const since the writer may modify the meta information of the layout.
   */
  void write (db::Layout &layout, tl::OutputStream &stream);

  /**
   *  @brief True, if for this format a valid writer is provided
   */
  bool is_valid () const
  {
    return mp_writer != 0;
  }

private:
  WriterBase *mp_writer;
  db::SaveLayoutOptions m_options;
};

}

#endif

