/**************************************************************************\
 *
 *  This file is part of the Coin 3D visualization library.
 *  Copyright (C) 1998-2006 by Systems in Motion.  All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  ("GPL") version 2 as published by the Free Software Foundation.
 *  See the file LICENSE.GPL at the root directory of this source
 *  distribution for additional information about the GNU GPL.
 *
 *  For using Coin with software that can not be combined with the GNU
 *  GPL, and for taking advantage of the additional benefits of our
 *  support services, please contact Systems in Motion about acquiring
 *  a Coin Professional Edition License.
 *
 *  See http://www.coin3d.org/ for more information.
 *
 *  Systems in Motion, Postboks 1283, Pirsenteret, 7462 Trondheim, NORWAY.
 *  http://www.sim.no/  sales@sim.no  coin-support@coin3d.org
 *
\**************************************************************************/

#ifndef COIN_SOSUBNODEENGINE_H
#define COIN_SOSUBNODEENGINE_H

#include <Inventor/nodes/SoSubNode.h>
#include <Inventor/engines/SoSubEngine.h>

#define SO_NODEENGINE_ABSTRACT_HEADER(_class_) \
  SO_NODE_ABSTRACT_HEADER(_class_); \
protected: \
  static const SoEngineOutputData ** getOutputDataPtr(void); \
public: \
  virtual const SoEngineOutputData * getOutputData(void) const; \
private: \
  static void atexit_cleanupnodeengine(void); \
  static SoEngineOutputData * outputdata; \
  static const SoEngineOutputData ** parentoutputdata

#define SO_NODEENGINE_HEADER(_class_) \
  SO_NODEENGINE_ABSTRACT_HEADER(_class_); \
  public: \
    static void * createInstance(void)

#define SO_NODEENGINE_ABSTRACT_SOURCE(_class_) \
SO_NODE_ABSTRACT_SOURCE(_class_); \
SoEngineOutputData * _class_::outputdata = NULL; \
const SoEngineOutputData ** _class_::parentoutputdata = NULL; \
 \
const SoEngineOutputData ** \
_class_::getOutputDataPtr(void) \
{ \
  return (const SoEngineOutputData**)&_class_::outputdata; \
} \
 \
const SoEngineOutputData * \
_class_::getOutputData(void) const \
{ \
  return _class_::outputdata; \
} \
 \
void \
_class_::atexit_cleanupnodeengine(void) { \
  delete _class_::outputdata; \
  _class_::outputdata = NULL; \
  _class_::parentoutputdata = NULL; \
  _class_::classTypeId STATIC_SOTYPE_INIT; \
}

#define SO_NODEENGINE_SOURCE(_class_) \
SO_NODEENGINE_ABSTRACT_SOURCE(_class_); \
 \
void * \
_class_::createInstance(void) \
{ \
  return new _class_; \
}

#define SO_NODEENGINE_CONSTRUCTOR(_class_) \
  do { \
    SoBase::staticDataLock(); \
    _class_::classinstances++; \
    /* Catch attempts to use an engine class which has not been initialized. */ \
    assert(_class_::classTypeId != SoType::badType()); \
    /* Initialize a inputdata container for the class only once. */ \
    if (!_class_::fieldData) { \
      _class_::fieldData = \
        new SoFieldData(_class_::parentFieldData ? \
                        *_class_::parentFieldData : NULL); \
      _class_::outputdata = \
        new SoEngineOutputData(_class_::parentoutputdata ? \
                               *_class_::parentoutputdata : NULL); \
    } \
    /* Extension classes from the application programmers should not be */ \
    /* considered native. This is important to get the export code to do */ \
    /* the Right Thing. */ \
    this->isBuiltIn = FALSE; \
    SoBase::staticDataUnlock(); \
  } while (0)

#define PRIVATE_COMMON_NODEENGINE_INIT_CODE(_class_, _classname_, _createfunc_, _parentclass_) \
  do { \
    /* Make sure we only initialize once. */ \
    assert(_class_::classTypeId == SoType::badType() && "don't init() twice!"); \
    /* Make sure superclass gets initialized before subclass. */ \
    assert(_parentclass_::getClassTypeId() != SoType::badType() && "you forgot init() on parentclass!"); \
 \
    /* Set up entry in the type system. */ \
    _class_::classTypeId = \
      SoType::createType(_parentclass_::getClassTypeId(), \
                         _classname_, \
                         _createfunc_, \
                         SoNode::getNextActionMethodIndex()); \
    SoNode::incNextActionMethodIndex(); \
 \
    /* Store parent's fielddata pointer for later use in the constructor. */ \
    _class_::parentFieldData = _parentclass_::getFieldDataPtr(); \
    _class_::parentoutputdata = _parentclass_::getOutputDataPtr(); \
  } while (0)

#define SO_NODEENGINE_INIT_CLASS(_class_, _parentclass_, _parentname_) \
  do { \
    const char * classname = SO__QUOTE(_class_); \
    PRIVATE_COMMON_INIT_CODE(_class_, classname, &_class_::createInstance, _parentclass_); \
  } while (0)

#define SO_NODEENGINE_EXIT_CLASS(_class_) \
  _class_::atexit_cleanupnodeengine();

#define SO_NODEENGINE_INIT_ABSTRACT_CLASS(_class_, _parentclass_, _parentname_) \
  do { \
    const char * classname = SO__QUOTE(_class_); \
    PRIVATE_COMMON_INIT_CODE(_class_, classname, NULL, _parentclass_); \
  } while (0)

#define SO_NODEENGINE_ADD_OUTPUT(_output_, _type_) \
  do { \
    outputdata->addOutput(this, SO__QUOTE(_output_), \
                          &this->_output_, \
                          _type_::getClassTypeId()); \
    this->_output_.setNodeContainer(this); \
  } while(0)

#endif // COIN_SOSUBNODEENGINE_H
