UndoRedoStack.h

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/*
 * This file is part of ArmarX.
 *
 * Copyright (C) 2012-2016, High Performance Humanoid Technologies (H2T), Karlsruhe Institute of Technology (KIT), all rights reserved.
 *
 * ArmarX is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * ArmarX 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, see <http://www.gnu.org/licenses/>.
 *
 * @package    MemoryX::gui-plugins::SceneEditor
 * @date       2015
 * @copyright  http://www.gnu.org/licenses/gpl-2.0.txt
 *             GNU General Public License
 */
 
#pragma once
 
// std
#include <exception>
#include <vector>
#include <memory>
 
// local
#include "ClassDefinitions.h"
#include "UndoAction.h"
#include "Controller.h"
 
namespace controller
{
    /**
    * A Stack to save a history of Actions.
    * This Stack provides Functions to move forward and backward in the history.
    *
    * @see controller::UndoAction
    */
    class UndoRedoStack
    {
    public:
        /**
        * A constructor.
        * Creates a new Instance of this class.
        */
        UndoRedoStack();
 
        /**
        * Returns the possibility to undo a Action.
        *
        * @return True, if there is a Action to undo; false otherwise.
        */
        bool canUndo();
 
        /**
        * Returns the possibility to redo a Action.
        *
        * @return True, if there is a Action to redo; false otherwise.
        */
        bool canRedo();
 
        /**
        * Goes one step back in the history and returns the Operations need to redo.
        */
        std::shared_ptr<std::vector<OperationPtr> > undo();
 
        /**
        * Goes one step forward in the history and returns the Operations need to redo.
        */
        std::shared_ptr<std::vector<OperationPtr> > redo();
 
        /**
        * Removes all actions from the history.
        */
        void clear();
 
        /**
        * Adds a Action to the history.
        * The redo history will be cleared.
        *
        * @param action The action to add to the history.
        * @see controller::UndoAction
        */
        void push(const std::shared_ptr<std::vector<OperationPtr> >& operations);
 
        /**
        * Swaps oldId and newId in all Operations saved in this class.
        *
        * @param oldId the first ID
        * @param newId the second ID
        */
        void updateObjectId(std::string oldId, std::string newId);
 
    private:
        std::unique_ptr<std::vector<UndoActionPtr> > undoStack;
        std::unique_ptr<std::vector<UndoActionPtr> > redoStack;
 
    };
}