Cppcheck - HTML report - digiKam-master-rev-960d3ce42d

# Cppcheck report - digiKam-master-rev-960d3ce42d: ../../core/utilities/geolocation/geoiface/items/gpsitemmodel.cpp

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    /* ============================================================
     *
     * This file is a part of digiKam project
     * https://www.digikam.org
     *
     * Date        : 2010-03-21
     * Description : A model to hold GPS information about items.
     *
     * SPDX-FileCopyrightText: 2010-2026 by Gilles Caulier <caulier dot gilles at gmail dot com>
     * SPDX-FileCopyrightText: 2010      by Michael G. Hansen <mike at mghansen dot de>
     *
     * SPDX-License-Identifier: GPL-2.0-or-later
     *
     * ============================================================ */

    #include "gpsitemmodel.h"

    // Local includes

    #include "digikam_debug.h"

    namespace Digikam
    {

    class Q_DECL_HIDDEN GPSItemModel::Private
    {
    public:

        Private() = default;

    public:

        QList<GPSItemContainer*>        items;
        int                             columnCount         = 0;
        QMap<QPair<int, int>, QVariant> headerData;
        ThumbnailLoadThread*            thumbnailLoadThread = nullptr;
    };

    GPSItemModel::GPSItemModel(QObject* const parent)
        : QAbstractItemModel(parent),
          d                 (new Private)
    {
        d->thumbnailLoadThread = new ThumbnailLoadThread(this);

        connect(d->thumbnailLoadThread, SIGNAL(signalThumbnailLoaded(LoadingDescription,QPixmap)),
                this, SLOT(slotThumbnailLoaded(LoadingDescription,QPixmap)));
    }

    GPSItemModel::~GPSItemModel()
    {
        // TODO: send a signal before deleting the items?

        qDeleteAll(d->items);
        delete d;
    }

    int GPSItemModel::columnCount(const QModelIndex& /*parent*/) const
    {
        return d->columnCount;
    }

    QVariant GPSItemModel::data(const QModelIndex& index, int role) const<--- Shadow argument
    {
        if (index.isValid())
        {
            Q_ASSERT(index.model() == this);
        }

        const int rowNumber = index.row();

        if ((rowNumber < 0) || (rowNumber >= d->items.count()))
        {
            return QVariant();
        }

        return d->items.at(rowNumber)->data(index.column(), role);
    }

    QModelIndex GPSItemModel::index(int row, int column, const QModelIndex& parent) const<--- Shadow argument
    {
    /*
        qCDebug(DIGIKAM_GENERAL_LOG)<<row<<column<<parent;
    */
        if (parent.isValid())
        {
            // there are no child items, only top level items

            return QModelIndex();
        }

        if (
            (column < 0)               ||
            (column >= d->columnCount) ||
            (row < 0)                  ||
            (row >= d->items.count())
           )
        {
            return QModelIndex();
        }

        return createIndex(row, column, (void*)nullptr);
    }

    QModelIndex GPSItemModel::parent(const QModelIndex& /*index*/) const
    {
        // we have only top level items

        return QModelIndex();
    }

    void GPSItemModel::addItem(GPSItemContainer* const newItem)
    {
        beginInsertRows(QModelIndex(), d->items.count(), d->items.count());
        newItem->setModel(this);
        d->items << newItem;
        endInsertRows();
    }

    void GPSItemModel::setColumnCount(const int nColumns)
    {
        Q_EMIT layoutAboutToBeChanged();

        d->columnCount = nColumns;

        Q_EMIT layoutChanged();
    }

    void GPSItemModel::itemChanged(GPSItemContainer* const changedItem)
    {
        const int itemIndex = d->items.indexOf(changedItem);

        if (itemIndex < 0)
        {
            return;
        }

        const QModelIndex itemModelIndexStart = createIndex(itemIndex, 0, (void*)nullptr);
        const QModelIndex itemModelIndexEnd   = createIndex(itemIndex, d->columnCount - 1, (void*)nullptr);

        Q_EMIT dataChanged(itemModelIndexStart, itemModelIndexEnd);
    }

    GPSItemContainer* GPSItemModel::itemFromIndex(const QModelIndex& index) const<--- Shadow argument
    {
        if (index.isValid())
        {
            Q_ASSERT(index.model() == this);
        }

        if (!index.isValid())
        {
            return nullptr;
        }

        const int row = index.row();

        if ((row < 0) || (row >= d->items.count()))
        {
            return nullptr;
        }

        return d->items.at(row);
    }

    int GPSItemModel::rowCount(const QModelIndex& parent) const<--- Shadow argument
    {
        if (parent.isValid())
        {
            return 0;
        }

        return d->items.count();
    }

    bool GPSItemModel::setHeaderData(int section, Qt::Orientation orientation, const QVariant& value, int role)
    {
        if ((section >= d->columnCount) || (orientation != Qt::Horizontal))
        {
            return false;
        }

        const QPair<int, int> headerIndex = QPair<int, int>(section, role);
        d->headerData[headerIndex]        = value;

        return true;
    }

    QVariant GPSItemModel::headerData(int section, Qt::Orientation orientation, int role) const
    {
        if ((section >= d->columnCount) || (orientation != Qt::Horizontal))
        {
            return false;
        }

        const QPair<int, int> headerIndex = QPair<int, int>(section, role);

        return d->headerData.value(headerIndex);
    }

    bool GPSItemModel::setData(const QModelIndex& index, const QVariant& value, int role)<--- Shadow argument
    {
        Q_UNUSED(index);
        Q_UNUSED(value);
        Q_UNUSED(role);

        return false;
    }

    Qt::ItemFlags GPSItemModel::flags(const QModelIndex& index) const<--- Shadow argument
    {
        if (index.isValid())
        {
            Q_ASSERT(index.model() == this);
        }

        if (!index.isValid())
        {
            return Qt::NoItemFlags;
        }

        return (QAbstractItemModel::flags(index) | Qt::ItemIsDragEnabled);
    }

    GPSItemContainer* GPSItemModel::itemFromUrl(const QUrl& url) const
    {
        for (int i = 0 ; i < d->items.count() ; ++i)
        {
            if (d->items.at(i)->url() == url)
            {
                return d->items.at(i);
            }
        }

        return nullptr;
    }

    QModelIndex GPSItemModel::indexFromUrl(const QUrl& url) const
    {
        for (int i = 0 ; i < d->items.count() ; ++i)
        {
            if (d->items.at(i)->url() == url)
            {
                return index(i, 0, QModelIndex());
            }
        }

        return QModelIndex();
    }

    QPixmap GPSItemModel::getPixmapForIndex(const QPersistentModelIndex& itemIndex, const int size)
    {
        if (itemIndex.isValid())
        {
            Q_ASSERT(itemIndex.model() == this);
        }

        // TODO: should we cache the pixmap on our own here or does the interface usually cache it for us?
        // TODO: do we need to make sure we do not request the same pixmap twice in a row?
        // construct the key under which we stored the pixmap in the cache

        const GPSItemContainer* const imageItem = itemFromIndex(itemIndex);

        if (!imageItem)
        {
            return QPixmap();
        }

        QPixmap thumbnail;

        if (d->thumbnailLoadThread->find(ThumbnailIdentifier(imageItem->url().toLocalFile()), thumbnail, size))
        {
            return thumbnail.copy(1, 1, thumbnail.size().width()-2, thumbnail.size().height()-2);
        }

        return QPixmap();
    }

    void GPSItemModel::slotThumbnailLoaded(const LoadingDescription& loadingDescription, const QPixmap& thumb)
    {
        if (thumb.isNull())
        {
            return;
        }

        const QModelIndex currentIndex = indexFromUrl(QUrl::fromLocalFile(loadingDescription.filePath));

        if (currentIndex.isValid())
        {
            QPersistentModelIndex goodIndex(currentIndex);

            Q_EMIT signalThumbnailForIndexAvailable(goodIndex, thumb.copy(1, 1, thumb.size().width()-2, thumb.size().height()-2));
        }
    }

    Qt::DropActions GPSItemModel::supportedDragActions() const
    {
        return Qt::CopyAction;
    }

    } // namespace Digikam

    #include "moc_gpsitemmodel.cpp"