/*
  Copyright (C) 2000-2005 SKYRIX Software AG

  This file is part of SOPE.

  SOPE is free software; you can redistribute it and/or modify it under
  the terms of the GNU Lesser General Public License as published by the
  Free Software Foundation; either version 2, or (at your option) any
  later version.

  SOPE 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 Lesser General Public
  License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with SOPE; see the file COPYING.  If not, write to the
  Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/

#ifndef __DOMNodeWalker_H__
#define __DOMNodeWalker_H__

#import <Foundation/NSObject.h>

@interface NGDOMNodeWalker : NSObject
{
  id   target;
  SEL  selector;
  id   ctx;
  
  BOOL isStopped;
  id   rootNode;
  id   currentParentNode;
  id   currentNode;
}

- (id)initWithTarget:(id)_target selector:(SEL)_selector context:(id)_ctx;

/* context */

- (id)context;
- (id)rootNode;
- (id)currentParentNode;
- (id)currentNode;

/* walking */

- (void)walkNode:(id)_node;
- (void)stopWalking;

@end

@interface NGDOMNodePreorderWalker : NGDOMNodeWalker
@end
@interface NGDOMNodePostorderWalker : NGDOMNodeWalker
@end

#endif /* __DOMNodeWalker_H__ */