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/* qti18n.cpp - Load qt translations for pinentry.
* Copyright 2021 g10 Code GmbH
* SPDX-FileCopyrightText: 2015 Lukáš Tinkl <ltinkl@redhat.com>
* SPDX-FileCopyrightText: 2021 Ingo Klöcker <kloecker@kde.org>
*
* Copied from k18n under the terms of LGPLv2 or later.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
* SPDX-License-Identifier: GPL-2.0+
*/
#include <QDebug>
#include <QCoreApplication>
#include <QLibraryInfo>
#include <QLocale>
#include <QTranslator>
#include <memory>
static bool loadCatalog(const QString &catalog, const QLocale &locale)
{
auto translator = new QTranslator(QCoreApplication::instance());
if (!translator->load(locale, catalog, QString(), QLibraryInfo::location(QLibraryInfo::TranslationsPath))) {
qDebug() << "Loading the" << catalog << "catalog failed for locale" << locale;
delete translator;
return false;
}
QCoreApplication::instance()->installTranslator(translator);
return true;
}
static bool loadCatalog(const QString &catalog, const QLocale &locale, const QLocale &fallbackLocale)
{
// try to load the catalog for locale
if (loadCatalog(catalog, locale)) {
return true;
}
// if this fails, then try the fallback locale (if it's different from locale)
if (fallbackLocale != locale) {
return loadCatalog(catalog, fallbackLocale);
}
return false;
}
// load global Qt translation, needed in KDE e.g. by lots of builtin dialogs (QColorDialog, QFontDialog) that we use
static void loadTranslation(const QString &localeName, const QString &fallbackLocaleName)
{
const QLocale locale{localeName};
const QLocale fallbackLocale{fallbackLocaleName};
// first, try to load the qt_ meta catalog
if (loadCatalog(QStringLiteral("qt_"), locale, fallbackLocale)) {
return;
}
// if loading the meta catalog failed, then try loading the four catalogs
// it depends on, i.e. qtbase, qtscript, qtmultimedia, qtxmlpatterns, separately
const auto catalogs = {
QStringLiteral("qtbase_"),
/* QStringLiteral("qtscript_"),
QStringLiteral("qtmultimedia_"),
QStringLiteral("qtxmlpatterns_"), */
};
for (const auto &catalog : catalogs) {
loadCatalog(catalog, locale, fallbackLocale);
}
}
static void load()
{
// The way Qt translation system handles plural forms makes it necessary to
// have a translation file which contains only plural forms for `en`. That's
// why we load the `en` translation unconditionally, then load the
// translation for the current locale to overload it.
loadCatalog(QStringLiteral("qt_"), QLocale{QStringLiteral("en")});
const QLocale locale = QLocale::system();
if (locale.name() != QStringLiteral("en")) {
loadTranslation(locale.name(), locale.bcp47Name());
}
}
Q_COREAPP_STARTUP_FUNCTION(load)
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