/*
  This file is part of Ingen.
  Copyright 2016 David Robillard <http://drobilla.net/>

  Ingen is free software: you can redistribute it and/or modify it under the
  terms of the GNU Affero General Public License as published by the Free
  Software Foundation, either version 3 of the License, or any later version.

  Ingen 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 Affero General Public License for details.

  You should have received a copy of the GNU Affero General Public License
  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef INGEN_EVENTS_UNDO_HPP
#define INGEN_EVENTS_UNDO_HPP

#include "Event.hpp"
#include "UndoStack.hpp"
#include "types.hpp"

namespace ingen {
namespace server {
namespace events {

/** A request to undo the last change to the engine.
 *
 * \ingroup engine
 */
class Undo : public Event
{
public:
	Undo(Engine&            engine,
	     SPtr<Interface>    client,
	     SampleCount        timestamp,
	     const ingen::Undo& msg);

	Undo(Engine&            engine,
	     SPtr<Interface>    client,
	     SampleCount        timestamp,
	     const ingen::Redo& msg);

	bool pre_process(PreProcessContext& ctx) override;
	void execute(RunContext& context) override;
	void post_process() override;

private:
	UndoStack::Entry _entry;
	bool             _is_redo;
};

} // namespace events
} // namespace server
} // namespace ingen

#endif // INGEN_EVENTS_UNDO_HPP