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qTox/src/widget/translator.cpp
2017-06-12 13:46:38 +03:00

104 lines
3.4 KiB
C++

/*
Copyright © 2014-2015 by The qTox Project Contributors
This file is part of qTox, a Qt-based graphical interface for Tox.
qTox is libre 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 3 of the License, or
(at your option) any later version.
qTox 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 qTox. If not, see <http://www.gnu.org/licenses/>.
*/
#include "translator.h"
#include <QApplication>
#include <QDebug>
#include <QLibraryInfo>
#include <QLocale>
#include <QMutexLocker>
#include <QString>
#include <QTranslator>
#include <algorithm>
QTranslator* Translator::translator{nullptr};
QVector<Translator::Callback> Translator::callbacks;
QMutex Translator::lock;
/**
* @brief Loads the translations according to the settings or locale.
*/
void Translator::translate(const QString& localeName)
{
QMutexLocker locker{&lock};
if (!translator)
translator = new QTranslator();
// Load translations
QCoreApplication::removeTranslator(translator);
QString locale = localeName.isEmpty() ? QLocale::system().name().section('_', 0, 0) : localeName;
if (locale != "en") {
if (translator->load(locale, ":translations/")) {
qDebug() << "Loaded translation" << locale;
// system menu translation
QTranslator* qtTranslator = new QTranslator();
QString s_locale = "qt_" + locale;
QString location = QLibraryInfo::location(QLibraryInfo::TranslationsPath);
if (qtTranslator->load(s_locale, location)) {
QApplication::installTranslator(qtTranslator);
qDebug() << "System translation loaded" << locale;
} else {
qDebug() << "System translation not loaded" << locale;
}
} else {
qDebug() << "Error loading translation" << locale;
}
QCoreApplication::installTranslator(translator);
}
// After the language is changed from RTL to LTR, the layout direction isn't
// always restored
const QString direction =
QApplication::tr("LTR", "Translate this string to the string 'RTL' in"
" right-to-left languages (for example Hebrew and"
" Arabic) to get proper widget layout");
QGuiApplication::setLayoutDirection(direction == "RTL" ? Qt::RightToLeft : Qt::LeftToRight);
for (auto pair : callbacks)
pair.second();
}
/**
* @brief Register a function to be called when the UI needs to be retranslated.
* @param f Function, wich will called.
* @param owner Widget to retanslate.
*/
void Translator::registerHandler(const std::function<void()>& f, void* owner)
{
QMutexLocker locker{&lock};
callbacks.push_back({owner, f});
}
/**
* @brief Unregisters all handlers of an owner.
* @param owner Owner to unregister.
*/
void Translator::unregister(void* owner)
{
QMutexLocker locker{&lock};
callbacks.erase(std::remove_if(begin(callbacks), end(callbacks),
[=](const Callback& c) { return c.first == owner; }),
end(callbacks));
}