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/*
* Copyright (C) 2010-2015 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2010 Carl Hetherington <carl@carlh.net>
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __pbd_stateful_diff_command_h__
#define __pbd_stateful_diff_command_h__
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
#include "pbd/command.h"
#include "pbd/libpbd_visibility.h"
namespace PBD
{
class StatefulDestructible;
class PropertyList;
/** A Command which stores its action as the differences between the before and after
* state of a Stateful object.
*/
class LIBPBD_API StatefulDiffCommand : public Command
{
public:
StatefulDiffCommand (boost::shared_ptr<StatefulDestructible>);
StatefulDiffCommand (boost::shared_ptr<StatefulDestructible>, XMLNode const&);
~StatefulDiffCommand ();
void operator() ();
void undo ();
XMLNode& get_state ();
bool empty () const;
private:
boost::weak_ptr<Stateful> _object; ///< the object in question
PBD::PropertyList* _changes; ///< property changes to execute this command
};
}; // namespace PBD
#endif /* __pbd_stateful_diff_command_h__ */
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