/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDESIGNERUNDOSTACK_H
#define QDESIGNERUNDOSTACK_H

#include <QtCore/QObject>

QT_BEGIN_NAMESPACE
class QUndoStack;
class QUndoCommand;

namespace qdesigner_internal {

/* QDesignerUndoStack: A QUndoStack extended by a way of setting it to
 * "dirty" indepently of commands (by modifications without commands
 * such as resizing). Accomplished via bool m_fakeDirty flag. The
 * lifecycle of the QUndoStack is managed by the QUndoGroup. */
class QDesignerUndoStack : public QObject
{
    Q_DISABLE_COPY(QDesignerUndoStack)
    Q_OBJECT
public:
    explicit QDesignerUndoStack(QObject *parent = 0);
    virtual ~QDesignerUndoStack();

    void clear();
    void push(QUndoCommand * cmd);
    void beginMacro(const QString &text);
    void endMacro();
    int  index() const;

    const QUndoStack *qundoStack() const;
    QUndoStack *qundoStack();

    bool isDirty() const;

signals:
    void changed();

public slots:
    void setDirty(bool);

private:
    QUndoStack *m_undoStack;
    bool m_fakeDirty;
};

} // namespace qdesigner_internal

QT_END_NAMESPACE

#endif // QDESIGNERUNDOSTACK_H
