Issue #261: About translation to Korean

Pdf4QtLibCore/sources/pdfapplicationtranslator.cpp

@@ -0,0 +1,166 @@
+//    Copyright (C) 2025-2025 Jakub Melka
+//
+//    This file is part of PDF4QT.
+//
+//    PDF4QT is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    with the written consent of the copyright owner, any later version.
+//
+//    PDF4QT 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 Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDF4QT.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "pdfapplicationtranslator.h"
+
+#include <QDir>
+#include <QSettings>
+#include <QMetaEnum>
+#include <QCoreApplication>
+
+namespace pdf
+{
+
+PDFApplicationTranslator::PDFApplicationTranslator()
+{
+
+}
+
+PDFApplicationTranslator::~PDFApplicationTranslator()
+{
+    uninstallTranslator();
+}
+
+PDFApplicationTranslator::ELanguage PDFApplicationTranslator::getLanguage() const
+{
+    return m_language;
+}
+
+void PDFApplicationTranslator::installTranslator()
+{
+    QDir applicationDirectory(QCoreApplication::applicationDirPath());
+    applicationDirectory.cd("translations");
+    QString translationPath = applicationDirectory.absolutePath();
+
+    Q_ASSERT(!m_translator);
+    m_translator = new QTranslator();
+
+    switch (m_language)
+    {
+        case E_LANGUAGE_AUTOMATIC_SELECTION:
+        {
+            if (m_translator->load(QLocale::system(), "PDF4QT", "_", translationPath))
+            {
+                QCoreApplication::installTranslator(m_translator);
+            }
+            else
+            {
+                delete m_translator;
+                m_translator = nullptr;
+            }
+            break;
+        }
+
+        case E_LANGUAGE_ENGLISH:
+        case E_LANGUAGE_CZECH:
+        case E_LANGUAGE_GERMAN:
+        case E_LANGUAGE_KOREAN:
+        case E_LANGUAGE_SPANISH:
+        {
+            QString languageFileName = getLanguageFileName();
+
+            if (m_translator->load(languageFileName, translationPath))
+            {
+                QCoreApplication::installTranslator(m_translator);
+            }
+            else
+            {
+                delete m_translator;
+                m_translator = nullptr;
+            }
+            break;
+        }
+
+        default:
+        {
+            delete m_translator;
+            m_translator = nullptr;
+
+            Q_ASSERT(false);
+            break;
+        }
+    }
+}
+
+void PDFApplicationTranslator::uninstallTranslator()
+{
+    if (m_translator)
+    {
+        QCoreApplication::removeTranslator(m_translator);
+
+        delete m_translator;
+        m_translator = nullptr;
+    }
+}
+
+void PDFApplicationTranslator::loadSettings()
+{
+    QMetaEnum metaEnum = QMetaEnum::fromType<ELanguage>();
+    std::string languageKeyString = loadLanguageKeyFromSettings().toStdString();
+    std::optional<quint64> value = metaEnum.keyToValue(languageKeyString.c_str());
+    m_language = static_cast<ELanguage>(value.value_or(E_LANGUAGE_AUTOMATIC_SELECTION));
+}
+
+void PDFApplicationTranslator::saveSettings()
+{
+    QMetaEnum metaEnum = QMetaEnum::fromType<ELanguage>();
+    QSettings settings(QSettings::IniFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());
+    settings.beginGroup("Language");
+    settings.setValue("language", metaEnum.valueToKey(m_language));
+    settings.endGroup();
+}
+
+void PDFApplicationTranslator::setLanguage(ELanguage newLanguage)
+{
+    m_language = newLanguage;
+}
+
+QString PDFApplicationTranslator::loadLanguageKeyFromSettings()
+{
+    QMetaEnum metaEnum = QMetaEnum::fromType<ELanguage>();
+    QSettings settings(QSettings::IniFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());
+    settings.beginGroup("Language");
+    QString languageKey = settings.value("language", metaEnum.valueToKey(E_LANGUAGE_AUTOMATIC_SELECTION)).toString();
+    settings.endGroup();
+
+    return languageKey;
+}
+
+QString PDFApplicationTranslator::getLanguageFileName() const
+{
+    switch (m_language)
+    {
+        case E_LANGUAGE_ENGLISH:
+            return QLatin1String("PDF4QT_en.qm");
+        case E_LANGUAGE_CZECH:
+            return QLatin1String("PDF4QT_cs.qm");
+        case E_LANGUAGE_GERMAN:
+            return QLatin1String("PDF4QT_de.qm");
+        case E_LANGUAGE_KOREAN:
+            return QLatin1String("PDF4QT_es.qm");
+        case E_LANGUAGE_SPANISH:
+            return QLatin1String("PDF4QT_ko.qm");
+            break;
+
+        default:
+            Q_ASSERT(false);
+    }
+
+    return QString();
+}
+
+}   // namespace