qandroidplatformfontdatabase.cpp

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// Copyright (C) 2012 BogDan Vatra <bogdan@kde.org>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include <QDir>
#include <QLocale>
 
#include "qandroidplatformfontdatabase.h"
 
QT_BEGIN_NAMESPACE
 
using namespace Qt::StringLiterals;
 
QString QAndroidPlatformFontDatabase::fontDir() const
{
    return "/system/fonts"_L1;
}
 
QFont QAndroidPlatformFontDatabase::defaultFont() const
{
    return QFont("Roboto"_L1);
}
 
void QAndroidPlatformFontDatabase::populateFontDatabase()
{
    QString fontpath = fontDir();
    QDir dir(fontpath);
 
    if (Q_UNLIKELY(!dir.exists())) {
        qFatal("QFontDatabase: Cannot find font directory %s - is Qt installed correctly?",
               qPrintable(fontpath));
    }
 
    QStringList nameFilters;
    nameFilters << "*.ttf"_L1
                << "*.otf"_L1
                << "*.ttc"_L1;
 
    const auto entries = dir.entryInfoList(nameFilters, QDir::Files);
    for (const QFileInfo &fi : entries) {
        const QByteArray file = QFile::encodeName(fi.absoluteFilePath());
        QFreeTypeFontDatabase::addTTFile(QByteArray(), file);
    }
}
 
QStringList QAndroidPlatformFontDatabase::fallbacksForFamily(const QString &family,
                                                             QFont::Style style,
                                                             QFont::StyleHint styleHint,
                                                             QFontDatabasePrivate::ExtendedScript script) const
{
    QStringList result;
 
    if (script == QFontDatabasePrivate::Script_Emoji) {
        result.append(QStringLiteral("Noto Color Emoji"));
        result.append(QStringLiteral("Noto Color Emoji Flags"));
    }
 
    // Prepend CJK fonts by the locale.
    QLocale locale = QLocale::system();
    switch (locale.language()) {
    case QLocale::Chinese: {
        switch (locale.territory()) {
        case QLocale::China:
        case QLocale::Singapore:
            result.append(QStringLiteral("Noto Sans Mono CJK SC"));
            break;
        case QLocale::Taiwan:
        case QLocale::HongKong:
        case QLocale::Macao:
            result.append(QStringLiteral("Noto Sans Mono CJK TC"));
            break;
        default:
            // no modifications.
            break;
        }
        break;
    }
    case QLocale::Japanese:
        result.append(QStringLiteral("Noto Sans Mono CJK JP"));
        break;
    case QLocale::Korean:
        result.append(QStringLiteral("Noto Sans Mono CJK KR"));
        break;
    default:
        // no modifications.
        break;
    }
 
    if (styleHint == QFont::Monospace || styleHint == QFont::Courier)
        result.append(QString(qgetenv("QT_ANDROID_FONTS_MONOSPACE")).split(u';'));
    else if (styleHint == QFont::Serif)
        result.append(QString(qgetenv("QT_ANDROID_FONTS_SERIF")).split(u';'));
    else
        result.append(QString(qgetenv("QT_ANDROID_FONTS")).split(u';'));
    result.append(QFreeTypeFontDatabase::fallbacksForFamily(family, style, styleHint, script));
 
    return result;
}
 
QT_END_NAMESPACE