/* This file has been generated by ecm_create_qm_loader(). Do not modify!
 *
 * Building this file in a library ensures translations are automatically loaded
 * when an application makes use of the library.
 *
 *
 * Copyright 2014 Aurélien Gâteau <agateau@kde.org>
 * Copyright 2015 Alex Merry <alex.merry@kde.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <QCoreApplication>
#include <QLocale>
#include <QStandardPaths>
#include <QThread>
#include <QTranslator>

namespace {

    bool loadTranslation(const QString &localeDirName)
    {
        QString subPath = QStringLiteral("locale/") + localeDirName + QStringLiteral("/LC_MESSAGES/@QM_LOADER_CATALOG_NAME@.qm");
        QString fullPath = QStandardPaths::locate(QStandardPaths::GenericDataLocation, subPath);
        if (fullPath.isEmpty()) {
            return false;
        }
        QTranslator *translator = new QTranslator(QCoreApplication::instance());
        if (!translator->load(fullPath)) {
            delete translator;
            return false;
        }
        QCoreApplication::instance()->installTranslator(translator);
        return true;
    }

    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.
        loadTranslation(QStringLiteral("en"));

        QLocale locale = QLocale::system();
        if (locale.name() != QStringLiteral("en")) {
            if (!loadTranslation(locale.name())) {
                loadTranslation(locale.bcp47Name());
            }
        }
    }

    // Helper to call load() on the main thread.
    //
    // Calling functions on another thread without using moc is non-trivial in
    // Qt until 5.4 (when some useful QTimer::singleShot overloads were added).
    //
    // Instead, we have to use QEvents. Ideally, we'd use a custom QEvent, but
    // there's a chance this could cause trouble with applications that claim
    // QEvent codes themselves, but don't register them with Qt (and we also
    // want to avoid registering a new QEvent code for every plugin that might
    // be loaded). We use QTimer because it's unlikely to be filtered by
    // applications, and is also unlikely to cause Qt to do something it
    // shouldn't.
    class Loader : public QObject
    {
    protected:
        void timerEvent(QTimerEvent *) Q_DECL_OVERRIDE
        {
            load();
            this->deleteLater();
        }
    };

    void loadOnMainThread()
    {
        // If this library is loaded after the QCoreApplication instance is
        // created (eg: because it is brought in by a plugin), there is no
        // guarantee this function will be called on the main thread.
        // QCoreApplication::installTranslator needs to be called on the main
        // thread, because it uses QCoreApplication::sendEvent.
        if (QThread::currentThread() == QCoreApplication::instance()->thread()) {
            load();
        } else {
            // QObjects inherit their parent object's thread
            Loader *loader = new Loader();
            loader->moveToThread(QCoreApplication::instance()->thread());
            QCoreApplication::instance()->postEvent(loader, new QTimerEvent(0), Qt::HighEventPriority);
        }
    }
}

Q_COREAPP_STARTUP_FUNCTION(loadOnMainThread)
