/*
 *  Copyright (c) 2002 Patrick Julien <freak@codepimps.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 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.
 */
#include "kis_types.h"
#include "kis_global.h"
#include "kis_tile.h"
#include "kis_tileddatamanager.h"
#include "kis_image.h"
#include "kis_transaction.h"
#include "kis_memento.h"
#include "kis_paint_device.h"
#include "kis_layer.h"

class KisTransactionPrivate {
public:
    QString m_name;
    KisPaintDeviceSP m_device;
    KisMementoSP m_memento;

};

KisTransaction::KisTransaction(const QString& name, KisPaintDeviceSP device)
{
    m_private = new KisTransactionPrivate;

    m_private->m_name = name;
    m_private->m_device = device;
    m_private->m_memento = device->getMemento();
}

KisTransaction::~KisTransaction()
{
    if (m_private->m_memento) {
        // For debugging purposes
        m_private->m_memento->setInvalid();
    }
    delete m_private;
}

void KisTransaction::execute()
{
    Q_ASSERT(m_private->m_memento != 0);

    m_private->m_device->rollforward(m_private->m_memento);

    QRect rc;
    Q_INT32 x, y, width, height;
    m_private->m_memento->extent(x,y,width,height);
    rc.setRect(x + m_private->m_device->getX(), y + m_private->m_device->getY(), width, height);

    KisLayerSP l = m_private->m_device->parentLayer();
    if (l) l->setDirty(rc);
}

void KisTransaction::unexecute()
{
    Q_ASSERT(m_private->m_memento != 0);
    m_private->m_device->rollback(m_private->m_memento);

    QRect rc;
    Q_INT32 x, y, width, height;
    m_private->m_memento->extent(x,y,width,height);
    rc.setRect(x + m_private->m_device->getX(), y + m_private->m_device->getY(), width, height);

    KisLayerSP l = m_private->m_device->parentLayer();
    if (l) l->setDirty(rc);

}

void KisTransaction::unexecuteNoUpdate()
{
    Q_ASSERT(m_private->m_memento != 0);

    m_private->m_device->rollback(m_private->m_memento);
}

QString KisTransaction::name() const
{
    return m_private->m_name;
}