Auto detect locale on desktop (#93)

demo/src/main.cpp

@@ -48,6 +48,8 @@ int main(int argc, char* argv[])
         }
     }
 
+    brls::Platform::APP_LOCALE_DEFAULT = brls::LOCALE_AUTO;
+
     // Init the app and i18n
     if (!brls::Application::init())
     {

library/lib/platforms/desktop/desktop_darwin.mm

@@ -46,4 +46,13 @@ bool darwin_runloop(const std::function<bool()>& runLoopImpl) {
     }
 }
 
+std::string darwin_locale() {
+    @autoreleasepool {
+        NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
+        NSArray *languages = [defaults objectForKey:@"AppleLanguages"];
+        NSString *current = [languages objectAtIndex:0];
+        return [current UTF8String];
+    }
+}
+
 }

library/lib/platforms/desktop/desktop_platform.cpp

@@ -429,7 +429,6 @@ DesktopPlatform::DesktopPlatform()
     {
         char* langEnv = getenv("BOREALIS_LANG");
         this->locale  = langEnv ? std::string(langEnv) : LOCALE_DEFAULT;
-        brls::Logger::info("Auto set app locale: {}", this->locale);
     }
     else
     {

library/lib/platforms/glfw/glfw_platform.cpp

@@ -37,6 +37,10 @@ extern "C"
 namespace brls
 {
 
+#if defined(__APPLE__)
+std::string darwin_locale();
+#endif
+
 static void glfwErrorCallback(int errorCode, const char* description)
 {
     switch (errorCode)
@@ -67,6 +71,54 @@ GLFWPlatform::GLFWPlatform()
     // Misc
     glfwSetTime(0.0);
 
+    // override local
+    if (Platform::APP_LOCALE_DEFAULT == LOCALE_AUTO)
+    {
+#if defined(_WIN32)
+        LANGID lang = GetUserDefaultLangID();
+        switch (PRIMARYLANGID(lang)) {
+        case LANG_CHINESE: this->locale = (SUBLANGID(lang) == SUBLANG_CHINESE_SIMPLIFIED) ? LOCALE_ZH_HANS : LOCALE_ZH_HANT; break;
+        case LANG_ENGLISH: this->locale = (SUBLANGID(lang) == SUBLANG_ENGLISH_UK) ? LOCALE_EN_GB : LOCALE_EN_US; break;
+        case LANG_FRENCH: this->locale = (SUBLANGID(lang) == SUBLANG_FRENCH_CANADIAN) ? LOCALE_FR_CA : LOCALE_FR; break;
+        case LANG_PORTUGUESE: this->locale = (SUBLANGID(lang) == SUBLANG_PORTUGUESE_BRAZILIAN) ? LOCALE_PT_BR : LOCALE_PT; break;
+        case LANG_JAPANESE: this->locale = LOCALE_JA; break;
+        case LANG_GERMAN: this->locale = LOCALE_DE; break;
+        case LANG_ITALIAN: this->locale = LOCALE_IT; break;
+        case LANG_SPANISH: this->locale = LOCALE_ES; break;
+        case LANG_KOREAN: this->locale = LOCALE_Ko; break;
+        case LANG_DUTCH: this->locale = LOCALE_NL; break;
+        case LANG_RUSSIAN: this->locale = LOCALE_RU; break;
+        default:;
+        }
+#elif defined(__APPLE__)
+        std::string lang = darwin_locale();
+        auto pos = lang.find_last_of('-');
+        this->locale = lang.substr(0, pos);
+#elif defined(__linux__)
+        char* langEnv = getenv("LANG");
+        /* fallback languages */
+        if (!langEnv) langEnv = getenv("LANGUAGE");
+        if (langEnv) {
+            std::unordered_map<std::string, std::string> lang2brls = {
+                { "zh_CN", LOCALE_ZH_HANS },
+                { "zh_TW", LOCALE_ZH_HANT },
+                { "ja_JP", LOCALE_JA },
+                { "ko_KR", LOCALE_Ko },
+                { "it_IT", LOCALE_IT }
+            };
+            char *ptr = strchr(langEnv, '.');
+            if (ptr) *ptr = '\0';
+
+            ptr = strchr(langEnv, '@');
+            if (ptr) *ptr = '\0';
+
+            std::string lang = langEnv;
+            this->locale = lang2brls.count(lang) ? lang2brls[lang] : LOCALE_EN_US;
+        }
+#endif
+        brls::Logger::info("Auto detect app locale: {}", this->locale);
+    }
+
     // Platform impls
     this->audioPlayer = new NullAudioPlayer();
 }