qqmlchangeset_p.h - mozsearch

Enable keyboard shortcuts

// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant

#ifndef QQMLCHANGESET_P_H

#define QQMLCHANGESET_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 <QtQmlIntegration/qqmlintegration.h>

#include <QtCore/qdebug.h>

#include <QtCore/qvector.h>

#include <QtQmlModels/private/qtqmlmodelsglobal_p.h>

#include <QtCore/qhashfunctions.h>

QT_BEGIN_NAMESPACE

class Q_QMLMODELS_EXPORT QQmlChangeSet

    Q_GADGET

    QML_ANONYMOUS

public:

    struct MoveKey

        MoveKey() {}

        MoveKey(int moveId, int offset) : moveId(moveId), offset(offset) {}

        int moveId = -1;

        int offset = 0;

    private:

        friend size_t qHash(MoveKey key, size_t seed = 0) noexcept

        { return qHashMulti(seed, key.moveId, key.offset); }

};

    // The storrage for Change (below). This struct is trivial, which it has to be in order to store

    // it in a QV4::Heap::Base object. The Change struct doesn't add any storage fields, so it is

    // safe to cast ChangeData to/from Change.

    struct ChangeData

        int index;

        int count;

        int moveId;

        int offset;

};

    struct Change: ChangeData

        Change() {

            index = 0;

            count = 0;

            moveId = -1;

            offset = 0;

        Change(int index, int count, int moveId = -1, int offset = 0) {

            this->index = index;

            this->count = count;

            this->moveId = moveId;

            this->offset = offset;

        bool isMove() const { return moveId >= 0; }

        MoveKey moveKey(int index) const {

            return MoveKey(moveId, index - Change::index + offset); }

        int start() const { return index; }

        int end() const { return index + count; }

};

    QQmlChangeSet();

    QQmlChangeSet(const QQmlChangeSet &changeSet);

    ~QQmlChangeSet();

    QQmlChangeSet &operator =(const QQmlChangeSet &changeSet);

    const QList<Change> &removes() const { return m_removes; }

    const QList<Change> &inserts() const { return m_inserts; }

    const QList<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, int moveId);

    void change(int index, int count);

    void insert(const QList<Change> &inserts);

    void remove(const QList<Change> &removes, QList<Change> *inserts = nullptr);

    void move(const QList<Change> &removes, const QList<Change> &inserts);

    void change(const QList<Change> &changes);

    void apply(const QQmlChangeSet &changeSet);

    bool isEmpty() const { return m_removes.empty() && m_inserts.empty() && m_changes.isEmpty(); }

    void clear()

        m_removes.clear();

        m_inserts.clear();

        m_changes.clear();

        m_difference = 0;

    int difference() const { return m_difference; }

private:

    void remove(QList<Change> *removes, QList<Change> *inserts);

    void change(QList<Change> *changes);

    QList<Change> m_removes;

    QList<Change> m_inserts;

    QList<Change> m_changes;

    int m_difference;

};

Q_DECLARE_TYPEINFO(QQmlChangeSet::Change, Q_PRIMITIVE_TYPE);

Q_DECLARE_TYPEINFO(QQmlChangeSet::MoveKey, Q_PRIMITIVE_TYPE);

inline bool operator ==(const QQmlChangeSet::MoveKey &l, const QQmlChangeSet::MoveKey &r) {

    return l.moveId == r.moveId && l.offset == r.offset; }

Q_QMLMODELS_EXPORT QDebug operator <<(QDebug debug, const QQmlChangeSet::Change &change);

Q_QMLMODELS_EXPORT QDebug operator <<(QDebug debug, const QQmlChangeSet &change);

QT_END_NAMESPACE

#endif