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Diffstat (limited to 'src/quick/util/qdeclarativechangeset_p.h')
| -rw-r--r-- | src/quick/util/qdeclarativechangeset_p.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/quick/util/qdeclarativechangeset_p.h b/src/quick/util/qdeclarativechangeset_p.h new file mode 100644 index 0000000000..b7554da503 --- /dev/null +++ b/src/quick/util/qdeclarativechangeset_p.h @@ -0,0 +1,166 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation ([email protected]) +** +** This file is part of the QtDeclarative module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 MoveKey + { + MoveKey() : moveId(-1), offset(0) {} + MoveKey(int moveId, int offset) : moveId(moveId), offset(offset) {} + int moveId; + int offset; + }; + + struct Change + { + Change() : index(0), count(0), moveId(-1) {} + Change(int index, int count) : index(index), count(count), moveId(-1) {} + Change(int index, int count, int moveId) : index(index), count(count), moveId(moveId) {} + + int index; + int count; + int moveId; + + bool isMove() const { return moveId >= 0; } + + MoveKey moveKey(int index) const { return MoveKey(moveId, index - Change::index); } + + int start() const { return index; } + int end() const { return index + count; } + }; + + + struct Insert : public Change + { + Insert() {} + Insert(int index, int count) : Change(index, count) {} + Insert(int index, int count, int moveId) : Change(index, count, moveId) {} + }; + + struct Remove : public Change + { + Remove() {} + Remove(int index, int count) : Change(index, count) {} + Remove(int index, int count, int moveId) : Change(index, count, moveId) {} + }; + + QDeclarativeChangeSet(); + QDeclarativeChangeSet(const QDeclarativeChangeSet &changeSet); + ~QDeclarativeChangeSet(); + + QDeclarativeChangeSet &operator =(const QDeclarativeChangeSet &changeSet); + + const QVector<Remove> &removes() const { return m_removes; } + const QVector<Insert> &inserts() const { return m_inserts; } + const QVector<Change> &changes() const {return m_changes; } + + void insert(int index, int count); + void remove(int index, int count); + void move(int from, int to, int count); + void change(int index, int count); + + void apply(const QDeclarativeChangeSet &changeSet); + void apply(const QVector<Remove> &removals); + void apply(const QVector<Insert> &insertions); + void apply(const QVector<Change> &changes); + void apply( + const QVector<Remove> &removals, + const QVector<Insert> &insertions, + const QVector<Change> &changes = QVector<Change>()); + + bool isEmpty() const { return m_removes.empty() && m_inserts.empty() && m_changes.empty(); } + + void clear() + { + m_removes.clear(); + m_inserts.clear(); + m_changes.clear(); + m_moveCounter = 0; + m_difference = 0; + } + + int moveCounter() const { return m_moveCounter; } + int difference() const { return m_difference; } + +private: + void applyRemovals(QVector<Remove> &removals, QVector<Insert> &insertions); + void applyInsertions(QVector<Insert> &insertions); + void applyChanges(QVector<Change> &changes); + + QVector<Remove> m_removes; + QVector<Insert> m_inserts; + QVector<Change> m_changes; + int m_moveCounter; + int m_difference; +}; + +inline uint qHash(const QDeclarativeChangeSet::MoveKey &key) { return qHash(qMakePair(key.moveId, key.offset)); } +inline bool operator ==(const QDeclarativeChangeSet::MoveKey &l, const QDeclarativeChangeSet::MoveKey &r) { + return l.moveId == r.moveId && l.offset == r.offset; } + +Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet &change); +Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Remove &remove); +Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Insert &insert); +Q_AUTOTEST_EXPORT QDebug operator <<(QDebug debug, const QDeclarativeChangeSet::Change &change); + +QT_END_NAMESPACE + +#endif |