qqmladaptormodel_p.h

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// 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 QQMLADAPTORMODEL_P_H

#define QQMLADAPTORMODEL_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/qabstractitemmodel.h>

#include <private/qqmldelegatemodel_p.h>

#include <private/qqmlguard_p.h>

#include <private/qqmllistaccessor_p.h>

#include <private/qqmlnullablevalue_p.h>

#include <private/qqmlpropertycache_p.h>

#include <private/qtqmlglobal_p.h>

#include <private/qtqmlmodelsglobal_p.h>

#include <QtCore/qtyperevision.h>

QT_REQUIRE_CONFIG(qml_delegate_model);

QT_BEGIN_NAMESPACE

class QQmlEngine;

class QQmlDelegateModelItem;

class QQmlDelegateModelItemMetaType;

class Q_QMLMODELS_EXPORT QQmlAdaptorModel : public QQmlGuard<QObject>

public:

    class Accessors

    public:

        inline Accessors() {}

        virtual ~Accessors();

        virtual int rowCount(const QQmlAdaptorModel &) const { return 0; }

        virtual int columnCount(const QQmlAdaptorModel &) const { return 0; }

        virtual void cleanup(QQmlAdaptorModel &) const {}

        virtual QVariant value(const QQmlAdaptorModel &, int, const QString &) const {

            return QVariant(); }

        virtual QQmlDelegateModelItem *createItem(

                QQmlAdaptorModel &,

                const QQmlRefPointer<QQmlDelegateModelItemMetaType> &,

                int, int, int) { return nullptr; }

        virtual bool notify(

                const QQmlAdaptorModel &,

                const QList<QQmlDelegateModelItem *> &,

                int,

                int,

                const QList<int> &) const { return false; }

        virtual void replaceWatchedRoles(

                QQmlAdaptorModel &,

                const QList<QByteArray> &,

                const QList<QByteArray> &) const {}

        virtual QVariant parentModelIndex(const QQmlAdaptorModel &) const {

            return QVariant(); }

        virtual QVariant modelIndex(const QQmlAdaptorModel &, int) const {

            return QVariant(); }

        virtual bool canFetchMore(const QQmlAdaptorModel &) const { return false; }

        virtual void fetchMore(QQmlAdaptorModel &) const {}

        QScopedPointer<QMetaObject, QScopedPointerPodDeleter> metaObject;

        QQmlPropertyCache::ConstPtr propertyCache;

};

    Accessors *accessors;

    QPersistentModelIndex rootIndex;

    QQmlListAccessor list;

    // we need to ensure that a JS created model does not get gced, but cannot

    // arbitrarily set the parent  (using QQmlStrongJSQObjectReference)  of QObject based models,

    // as that causes issues with singletons

    QV4::PersistentValue modelStrongReference;

    QTypeRevision modelItemRevision = QTypeRevision::zero();

    QQmlDelegateModel::DelegateModelAccess delegateModelAccess = QQmlDelegateModel::Qt5ReadWrite;

    QQmlAdaptorModel();

    ~QQmlAdaptorModel();

    inline QVariant model() const { return list.list(); }

    void setModel(const QVariant &variant);

    void invalidateModel();

    bool isValid() const;

    int count() const;

    int rowCount() const;

    int columnCount() const;

    int rowAt(int index) const;

    int columnAt(int index) const;

    int indexAt(int row, int column) const;

    void useImportVersion(QTypeRevision revision);

    inline bool adaptsAim() const { return qobject_cast<QAbstractItemModel *>(object()); }

    inline QAbstractItemModel *aim() { return static_cast<QAbstractItemModel *>(object()); }

    inline const QAbstractItemModel *aim() const { return static_cast<const QAbstractItemModel *>(object()); }

    inline QVariant value(int index, const QString &role) const {

        return accessors->value(*this, index, role); }

    inline QQmlDelegateModelItem *createItem(

            const QQmlRefPointer<QQmlDelegateModelItemMetaType> &metaType, int index)

        return accessors->createItem(*this, metaType, index, rowAt(index), columnAt(index));

    inline bool hasProxyObject() const {

        switch (list.type()) {

        case QQmlListAccessor::Instance:

        case QQmlListAccessor::ListProperty:

        case QQmlListAccessor::ObjectList:

        case QQmlListAccessor::ObjectSequence:

            return true;

        default:

            break;

        return false;

    inline bool notify(

            const QList<QQmlDelegateModelItem *> &items,

            int index,

            int count,

            const QList<int> &roles) const {

        return accessors->notify(*this, items, index, count, roles); }

    inline void replaceWatchedRoles(

            const QList<QByteArray> &oldRoles, const QList<QByteArray> &newRoles) {

        accessors->replaceWatchedRoles(*this, oldRoles, newRoles); }

    inline QVariant modelIndex(int index) const { return accessors->modelIndex(*this, index); }

    inline QVariant parentModelIndex() const { return accessors->parentModelIndex(*this); }

    inline bool canFetchMore() const { return accessors->canFetchMore(*this); }

    inline void fetchMore() { return accessors->fetchMore(*this); }

private:

    static void objectDestroyedImpl(QQmlGuardImpl *);

    Accessors m_nullAccessors;

};

QT_END_NAMESPACE

#endif