/*!
  @header ECXMLControlRule
  @abstract Module of Encore
 
  @availability OS X, GNUstep
  @copyright 2004, 2005, 2006 Oliver Langer

  Author: Oliver Langer

  This library 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 2.1 of the License, or (at your option) any later version.

  This library 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 this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA

  <pre>
  -------------------------------------------------------------------------
  Modification history

  27.11.05 ola     initial version
  22.08.06 ola     license changed
  -------------------------------------------------------------------------
  </pre>
*/

#if !defined(__ECXMLControlRule_H)
#define __ECXMLControlRule_H

#include <Foundation/Foundation.h>
#include <Encore/ECObject.h>
#include <Encore/ECXMLControlContext.h>

/*!
 * @protocol ECXMLControlRule
 * @abstract A Rule performs a certain action based on a given context,state 
 *   and event.
 */
@protocol ECXMLControlRule <ECObject>

/*!
 * @method respondsToContext
 * @param aContext current context to evaluate
 * @result YES if the receiver should be valuated according to the given 
 *   context
 */
- (BOOL) mayActOn: (ECXMLControlContext *) aContext;


/*!
 * @method actOn
 * @param aContext current context to evaluate
 * @result YES if no more rules should be evaluated
 */
- (BOOL) actOn: (ECXMLControlContext *) aContext;
@end
#endif