qqmldmlistaccessordata.cpp

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// Copyright (C) 2023 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

#include <private/qqmldmlistaccessordata_p.h>

QT_BEGIN_NAMESPACE

QQmlDMListAccessorData::QQmlDMListAccessorData(

        const QQmlRefPointer<QQmlDelegateModelItemMetaType> &metaType,

        VDMListDelegateDataType *dataType,

        int index, int row, int column, const QVariant &value)

    : QQmlDelegateModelItem(metaType, dataType, index, row, column)

    , cachedData(value)

    QObjectPrivate::get(this)->metaObject = dataType;

    dataType->addref();

QQmlDMListAccessorData::~QQmlDMListAccessorData()

    QObjectPrivate *d = QObjectPrivate::get(this);

    static_cast<VDMListDelegateDataType *>(d->metaObject)->release();

    d->metaObject = nullptr;

void QQmlDMListAccessorData::setModelData(const QVariant &data) {

    if (data == cachedData)

        return;

    cachedData = data;

    cachedDataClean = false;

    static_cast<const VDMListDelegateDataType *>(QObjectPrivate::get(this)->metaObject)

            ->emitAllSignals(this);

void QQmlDMListAccessorData::setValue(const QString &role, const QVariant &value)

    // Used only for initialization of the cached data. Does not have to emit change signals.

    Q_ASSERT(!cachedDataClean);

    if (role == QLatin1String("modelData") || role.isEmpty())

        cachedData = value;

    else

        VDMListDelegateDataType::setValue(&cachedData, role, value);

bool QQmlDMListAccessorData::resolveIndex(const QQmlAdaptorModel &model, int idx)

    if (hasValidModelIndex())

        return false;

    setModelIndex(idx, modelRow(), modelColumn());

    setModelData(model.list.at(idx));

    emit modelIndexChanged();

    return true;

void VDMListDelegateDataType::emitAllSignals(QQmlDMListAccessorData *accessor) const

    for (int i = propertyOffset, end = propertyCount(); i != end; ++i)

        QMetaObject::activate(accessor, this, i - propertyOffset, nullptr);

    emit accessor->modelDataChanged();

int VDMListDelegateDataType::metaCall(

        QObject *object, QMetaObject::Call call, int id, void **arguments)

    Q_ASSERT(qobject_cast<QQmlDMListAccessorData *>(object));

    QQmlDMListAccessorData *accessor = static_cast<QQmlDMListAccessorData *>(object);

    switch (call) {

    case QMetaObject::ReadProperty: {

        if (id < propertyOffset)

            break;

        QVariant *result = static_cast<QVariant *>(arguments[0]);

        const QByteArray name = property(id).name();

        const QVariant data = accessor->hasValidModelIndex()

                ? model->list.at(accessor->modelIndex())

                : accessor->modelData();

        *result = value(&data, name);

        return -1;

    case QMetaObject::WriteProperty: {

        if (id < propertyOffset)

            break;

        const QVariant &argument = *static_cast<QVariant *>(arguments[0]);

        const QByteArray name = property(id).name();

        QVariant data = accessor->hasValidModelIndex()

                ? model->list.at(accessor->modelIndex())

                : accessor->modelData();

        if (argument == value(&data, name))

            return -1;

        setValue(&data, name, argument);

        if (accessor->hasValidModelIndex()) {

            model->list.set(accessor->modelIndex(), data);

            accessor->metaType()->emitModelChanged();

        } else {

            accessor->cachedData = data;

            accessor->cachedDataClean = false;

        QMetaObject::activate(accessor, this, id - propertyOffset, nullptr);

        emit accessor->modelDataChanged();

        return -1;

    default:

        break;

    return accessor->qt_metacall(call, id, arguments);

int VDMListDelegateDataType::createProperty(const char *name, const char *)

    const int propertyIndex = propertyCount() - propertyOffset;

    // We use QVariant because the types may be different in the different objects.

    QQmlAdaptorModelEngineData::addProperty(

            &builder, propertyIndex, name, QByteArrayLiteral("QVariant"),

            model->delegateModelAccess != QQmlDelegateModel::ReadOnly);

    metaObject.reset(builder.toMetaObject());

    *static_cast<QMetaObject *>(this) = *metaObject;

    return propertyIndex + propertyOffset;

#if QT_VERSION >= QT_VERSION_CHECK(7, 0, 0)

const QMetaObject *VDMListDelegateDataType::toDynamicMetaObject(QObject *object) const

#else

QMetaObject *VDMListDelegateDataType::toDynamicMetaObject(QObject *object)

#endif

    QQmlDMListAccessorData *data = static_cast<QQmlDMListAccessorData *>(object);

    if (!data->usesStructuredModelData()) {

        // We cannot produce structured modelData. There should be a propertyCache so that row and

        // column are hidden. We shall also return the static metaObject in that case.

        if (!propertyCache) {

            propertyCache = QQmlPropertyCache::createStandalone(

                    &QQmlDMListAccessorData::staticMetaObject, model->modelItemRevision);

            if (QQmlData *ddata = QQmlData::get(object, true))

                ddata->propertyCache = propertyCache;

#if QT_VERSION >= QT_VERSION_CHECK(7, 0, 0)

        return &QQmlDMListAccessorData::staticMetaObject;

#else

        return const_cast<QMetaObject *>(&QQmlDMListAccessorData::staticMetaObject);

#endif

    // If the context object is not the model object, we are using required properties.

    // In that case, create any extra properties.

    if (!data->cachedDataClean) {

        createMissingProperties(&data->cachedData);

        data->cachedDataClean = true;

    return this;

QT_END_NAMESPACE