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/************************************************************************
*
* Copyright (C) 2009-2024 IRCAD France
* Copyright (C) 2012-2017 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight 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 3 of the License, or
* (at your option) any later version.
*
* Sight 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 Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#pragma once
#include <sight/ui/history/config.hpp>
#include <memory>
#include <string>
namespace sight::ui::history
{
/**
* @brief The base class for commands.
*/
class SIGHT_UI_HISTORY_CLASS_API command
{
public:
using sptr = std::shared_ptr<command>;
/**
* @brief Virtual destructor.
*/
SIGHT_UI_HISTORY_API virtual ~command()
= default;
/**
* @brief Retrieves the memory footprint of the command.
*/
[[nodiscard]] SIGHT_UI_HISTORY_API virtual std::size_t size() const = 0;
/**
* @brief Used to implement the redo operation.
*/
SIGHT_UI_HISTORY_API virtual bool redo() = 0;
/**
* @brief Used to implement the undo operation.
*/
SIGHT_UI_HISTORY_API virtual bool undo() = 0;
/**
* @brief Return an optional description of the command.
*/
[[nodiscard]] SIGHT_UI_HISTORY_API virtual std::string get_description() const
{
return "";
}
};
} // namespace sight::ui::history
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