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https://github.com/RetroDECK/ES-DE.git
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93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
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// SPDX-License-Identifier: MIT
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//
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// ES-DE Frontend
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// LocalizationUtil.cpp
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//
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// Localization functions.
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// Provides support for translations using gettext/libintl.
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//
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#include "utils/LocalizationUtil.h"
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#include "Log.h"
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#include "resources/ResourceManager.h"
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#include "utils/StringUtil.h"
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#include <algorithm>
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#include <iostream>
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namespace Utils
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{
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namespace Localization
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{
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std::string getLocale()
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{
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std::string language;
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// The LANGUAGE environment variable takes precedence over LANG.
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if (getenv("LANGUAGE") != nullptr)
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language = getenv("LANGUAGE");
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const std::vector<std::string> languageValues {
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Utils::String::delimitedStringToVector(language, ":")};
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for (auto value : languageValues) {
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if (std::find(sSupportedLanguages.cbegin(), sSupportedLanguages.cend(), value) !=
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sSupportedLanguages.cend()) {
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return value;
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}
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}
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if (getenv("LANG") != nullptr)
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language = getenv("LANG");
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if (language.empty())
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return "en_US";
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return language.substr(0, language.find("."));
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}
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void setLanguage(const std::string& locale)
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{
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if (std::find(sSupportedLanguages.cbegin(), sSupportedLanguages.cend(), locale) ==
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sSupportedLanguages.cend()) {
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LOG(LogInfo) << "No support for language \"" << locale
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<< "\", reverting to default language \"en_US\"";
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return;
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}
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else {
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LOG(LogInfo) << "Setting application language to \"" << locale << "\"";
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}
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// No need to perform translations if we're using the default language.
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if (locale == "en_US")
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return;
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std::string localePath;
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localePath.append("/")
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.append(locale)
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.append("/LC_MESSAGES/")
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.append(locale)
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.append(".mo");
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// If the message catalog file is not found then an emergency shutdown will be
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// initiated by ResourceManager.
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std::string objectPath {
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ResourceManager::getInstance().getResourcePath(":/locale" + localePath)};
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// This makes it possible to override the message catalog with a file in the
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// application data directory.
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if (objectPath.length() > localePath.length())
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objectPath = objectPath.substr(0, objectPath.length() - localePath.length());
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setenv("LANGUAGE", locale.c_str(), 1);
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setlocale(LC_MESSAGES, "");
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textdomain(locale.c_str());
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bindtextdomain(locale.c_str(), objectPath.c_str());
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bind_textdomain_codeset(locale.c_str(), "UTF-8");
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}
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} // namespace Localization
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} // namespace Utils
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