mirror of
https://github.com/YACReader/yacreader
synced 2026-04-12 15:49:53 -04:00
3fede5dabf
All translations have been updated, and translations of the actions in the library have been fixed.
132 lines
3.7 KiB
C++
132 lines
3.7 KiB
C++
#ifndef APP_LANGUAGE_UTILS_H
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#define APP_LANGUAGE_UTILS_H
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#include "yacreader_global_gui.h"
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#include <QCoreApplication>
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#include <QDir>
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#include <QLocale>
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#include <QRegularExpression>
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#include <QSet>
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#include <QTranslator>
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#include <algorithm>
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namespace YACReader::UiLanguage {
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struct LanguageOption {
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QString code;
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QString displayName;
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};
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inline QStringList translationDirectories()
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{
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QStringList directories;
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#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
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directories << QString(DATADIR) + "/yacreader/languages";
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#endif
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directories << QCoreApplication::applicationDirPath() + "/languages";
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directories.removeDuplicates();
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return directories;
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}
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inline bool loadFromLocale(QTranslator &translator, const QString &prefix, const QLocale &locale)
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{
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const auto dirs = translationDirectories();
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for (const auto &dir : dirs) {
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if (translator.load(locale, prefix, "_", dir))
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return true;
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}
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return false;
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}
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inline bool loadTranslator(QTranslator &translator, const QString &prefix, const QString &languageOverride = QString())
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{
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auto selectedLanguage = languageOverride.trimmed();
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if (!selectedLanguage.isEmpty()) {
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selectedLanguage.replace('-', '_');
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if (loadFromLocale(translator, prefix, QLocale(selectedLanguage)))
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return true;
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auto baseLanguage = selectedLanguage.section('_', 0, 0);
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if (baseLanguage != selectedLanguage && loadFromLocale(translator, prefix, QLocale(baseLanguage)))
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return true;
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}
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return loadFromLocale(translator, prefix, QLocale());
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}
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inline QTranslator &appTranslator()
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{
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static QTranslator translator;
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return translator;
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}
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inline bool applyLanguage(const QString &prefix, const QString &languageOverride = QString())
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{
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auto &translator = appTranslator();
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QCoreApplication::removeTranslator(&translator);
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const auto loaded = loadTranslator(translator, prefix, languageOverride);
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QCoreApplication::installTranslator(&translator);
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return loaded;
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}
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inline QString languageDisplayName(const QString &languageCode)
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{
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QLocale locale(languageCode);
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QString languageName = locale.nativeLanguageName();
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if (languageName.isEmpty())
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languageName = QLocale::languageToString(locale.language());
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if (languageName.isEmpty())
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languageName = languageCode;
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QString territoryName;
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if (locale.territory() != QLocale::AnyTerritory)
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territoryName = locale.nativeTerritoryName();
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if (!territoryName.isEmpty())
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return QString("%1 (%2)").arg(languageName, territoryName);
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return languageName;
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}
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inline QList<LanguageOption> availableLanguages(const QString &prefix)
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{
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QSet<QString> languageCodes;
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const auto pattern = QRegularExpression(
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"^" + QRegularExpression::escape(prefix) + "_(.+)\\.qm$");
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const auto dirs = translationDirectories();
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for (const auto &dirPath : dirs) {
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QDir dir(dirPath);
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if (!dir.exists())
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continue;
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const auto files = dir.entryList(
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QStringList { prefix + "_*.qm" }, QDir::Files, QDir::Name);
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for (const auto &file : files) {
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auto match = pattern.match(file);
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if (match.hasMatch())
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languageCodes.insert(match.captured(1));
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}
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}
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QList<LanguageOption> options;
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for (const auto &languageCode : languageCodes) {
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options.append({ languageCode, languageDisplayName(languageCode) });
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}
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std::sort(options.begin(), options.end(), [](const LanguageOption &lhs, const LanguageOption &rhs) {
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return lhs.displayName.localeAwareCompare(rhs.displayName) < 0;
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});
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return options;
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}
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} // namespace YACReader::UiLanguage
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#endif // APP_LANGUAGE_UTILS_H
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