operation.h

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// -*- C++ -*-

/*
 * GChemPaint library
 * operation.h
 *
 * Copyright (C) 2002-2008 Jean Bréfort <jean.brefort@normalesup.org>
 *
 * 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 3 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 St, Fifth Floor, Boston, MA  02110-1301
 * USA
 */

#ifndef GCHEMPAINT_OPERATION_H
#define GCHEMPAINT_OPERATION_H

#include <gcu/macros.h>
#include <gcu/object.h>

namespace gcp {

class Document;

typedef enum
{
        GCP_ADD_OPERATION,
        GCP_DELETE_OPERATION,
        GCP_MODIFY_OPERATION,
} OperationType;

class Operation
{
public:
        Operation (Document *pDoc, unsigned long ID);
        virtual ~Operation ();

        virtual void Undo () = 0;
        virtual void Redo () = 0;
        virtual void AddObject (gcu::Object* pObject, unsigned type = 0);
        virtual void AddNode (xmlNodePtr node, unsigned type = 0);

protected:
        void Add (unsigned type = 0);
        void Delete (unsigned type = 0);

protected:
        xmlNodePtr* m_Nodes;

private:
        gcp::Document* m_pDoc;

GCU_RO_PROP (unsigned long, ID);
};

class AddOperation: public Operation
{
public:
        AddOperation (gcp::Document *pDoc, unsigned long ID);
        virtual ~AddOperation ();

        void Undo ();
        void Redo ();
};

class DeleteOperation: public Operation
{
public:
        DeleteOperation (gcp::Document *pDoc, unsigned long ID);
        virtual ~DeleteOperation ();

        void Undo ();
        void Redo ();
};

class ModifyOperation: public Operation
{
public:
        ModifyOperation (gcp::Document *pDoc, unsigned long ID);
        virtual ~ModifyOperation ();

        void Undo ();
        void Redo ();
};

}       // namespace gcp

#endif //GCHEMPAINT_OPERATION_H