qt-everywhere-src-5.15.1/qtquickcontrols/src/dialogs/Private/qquickwritingsystemlistmodel.cpp

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#include "qquickwritingsystemlistmodel_p.h"
#include <QtGui/qfontdatabase.h>
#include <QtQml/qqmlcontext.h>
#include <QtQml/qqml.h>
#include <QtQml/qqmlengine.h>

QT_BEGIN_NAMESPACE

class QQuickWritingSystemListModelPrivate
{
    Q_DECLARE_PUBLIC(QQuickWritingSystemListModel)

public:
    QQuickWritingSystemListModelPrivate(QQuickWritingSystemListModel *q)
        : q_ptr(q)
    {}

    QQuickWritingSystemListModel *q_ptr;
    QList<QFontDatabase::WritingSystem> wss;
    QHash<int, QByteArray> roleNames;
    ~QQuickWritingSystemListModelPrivate() {}
    void init();
};


void QQuickWritingSystemListModelPrivate::init()
{
    Q_Q(QQuickWritingSystemListModel);
    wss << QFontDatabase::Any;
    QFontDatabase db;
    wss << db.writingSystems();

    emit q->rowCountChanged();
    emit q->writingSystemsChanged();
}

QQuickWritingSystemListModel::QQuickWritingSystemListModel(QObject *parent)
    : QAbstractListModel(parent), d_ptr(new QQuickWritingSystemListModelPrivate(this))
{
    Q_D(QQuickWritingSystemListModel);
    d->roleNames[WritingSystemNameRole] = "name";
    d->roleNames[WritingSystemSampleRole] = "sample";
    d->init();
}

QQuickWritingSystemListModel::~QQuickWritingSystemListModel()
{
}

QVariant QQuickWritingSystemListModel::data(const QModelIndex &index, int role) const
{
    Q_D(const QQuickWritingSystemListModel);
    QVariant rv;

    if (index.row() >= d->wss.size())
        return rv;

    switch (role)
    {
        case WritingSystemNameRole:
            rv = QFontDatabase::writingSystemName(d->wss.at(index.row()));
            break;
        case WritingSystemSampleRole:
            rv = QFontDatabase::writingSystemSample(d->wss.at(index.row()));
            break;
        default:
            break;
    }
    return rv;
}

QHash<int, QByteArray> QQuickWritingSystemListModel::roleNames() const
{
    Q_D(const QQuickWritingSystemListModel);
    return d->roleNames;
}

int QQuickWritingSystemListModel::rowCount(const QModelIndex &parent) const
{
    Q_D(const QQuickWritingSystemListModel);
    Q_UNUSED(parent);
    return d->wss.size();
}

QModelIndex QQuickWritingSystemListModel::index(int row, int , const QModelIndex &) const
{
    return createIndex(row, 0);
}

QStringList QQuickWritingSystemListModel::writingSystems() const
{
    Q_D(const QQuickWritingSystemListModel);
    QStringList result;
    result.reserve(d->wss.size());
    for (QFontDatabase::WritingSystem ws : qAsConst(d->wss))
        result.append(QFontDatabase::writingSystemName(ws));

    return result;
}

QJSValue QQuickWritingSystemListModel::get(int idx) const
{
    Q_D(const QQuickWritingSystemListModel);

    QJSEngine *engine = qmlEngine(this);

    if (idx < 0 || idx >= count())
        return engine->newObject();

    QJSValue result = engine->newObject();
    int count = d->roleNames.count();
    for (int i = 0; i < count; ++i)
        result.setProperty(QString(d->roleNames[Qt::UserRole + i + 1]), data(index(idx, 0), Qt::UserRole + i + 1).toString());

    return result;

}

void QQuickWritingSystemListModel::classBegin()
{
}

void QQuickWritingSystemListModel::componentComplete()
{
}

QT_END_NAMESPACE