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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDECLARATIVECHANGESET_P_H
+#define QDECLARATIVECHANGESET_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qdebug.h>
+#include <QtCore/qvector.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_AUTOTEST_EXPORT QDeclarativeChangeSet
+{
+public:
+    struct Insert
+    {
+        Insert() {}
+        Insert(int start, int end) : start(start), end(end) {}
+
+        int count() const { return end - start; }
+
+        int start;
+        int end;
+    };
+
+    struct Remove
+    {
+        Remove() {}
+        Remove(int start, int end) : start(start), end(end) {}
+
+        int count() const { return end - start; }
+
+        int start;
+        int end;
+    };
+
+    struct Move
+    {
+        Move() {}
+        Move(int start, int end, int to) : fstart(start), fend(end), tstart(to), tend(to + end - start) {}
+
+        int minimum() const { return qMin(fstart, tstart); }
+        int maximum() const { return qMax(fend, tend); }
+        int count() const { return fend - fstart; }
+
+        union {
+            int start;
+            int fstart;
+        };
+        union {
+            int end;
+            int fend;
+        };
+        union {
+            int to;
+            int tstart;
+        };
+        int tend;
+    };
+
+    struct Change
+    {
+        Change() {}
+        Change(int start, int end) : start(start), end(end) {}
+
+        int count() const { return end - start; }
+
+        int start;
+        int end;
+    };
+
+    const QVector<Remove> &removes() const { return m_removes; }
+    const QVector<Insert> &inserts() const { return m_inserts; }
+    const QVector<Move> &moves() const { return m_moves; }
+    const QVector<Change> &changes() const {return  m_changes; }
+
+    void insertInsert(int start, int end);
+    void insertRemove(int start, int end);
+    void insertMove(int start, int end, int to);
+    void insertChange(int start, int end);
+
+    void appendInsert(int start, int end) { m_inserts.append(Insert(start, end)); }
+    void appendRemove(int start, int end) { m_removes.append(Remove(start, end)); }
+    void appendMove(int start, int end, int to) { m_moves.append(Move(start, end, to)); }
+    void appendChange(int start, int end) { m_changes.append(Change(start, end)); }
+
+    void append(const QVector<Insert> &inserts) { m_inserts += inserts; }
+    void append(const QVector<Remove> &removes) { m_removes += removes; }
+    void append(const QVector<Move> &moves) { m_moves += moves; }
+    void append(const QVector<Change> &changes) { m_changes += changes; }
+
+    void clear()
+    {
+        m_removes.clear();
+        m_inserts.clear();
+        m_moves.clear();
+        m_changes.clear();
+    }
+
+private:
+    QVector<Remove> m_removes;
+    QVector<Insert> m_inserts;
+    QVector<Move> m_moves;
+    QVector<Change> m_changes;
+};
+
+Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet &change);
+
+QT_END_NAMESPACE
+
+#endif