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