Use system language as default content language

app/src/common/shared/org/mozilla/vrbrowser/ui/widgets/settings/ContentLanguageOptionsView.java

@@ -129,8 +129,8 @@ private void refreshLanguages() {
 
     @Override
     protected boolean reset() {
-        SettingsStore.getInstance(getContext()).setContentLocales(Collections.singletonList(LocaleUtils.getSystemLocale()));
-        SessionStore.get().setLocales(Collections.singletonList(LocaleUtils.getSystemLocale()));
+        SettingsStore.getInstance(getContext()).setContentLocales(Collections.singletonList(LocaleUtils.getDeviceLanguage().getId()));
+        SessionStore.get().setLocales(Collections.singletonList(LocaleUtils.getDeviceLanguage().getId()));
         LocaleUtils.resetLanguages();
         refreshLanguages();
 

app/src/common/shared/org/mozilla/vrbrowser/ui/widgets/settings/DisplayLanguageOptionsView.java

@@ -57,15 +57,15 @@ private void initialize(Context aContext) {
 
     @Override
     protected boolean reset() {
-        String systemLocale = LocaleUtils.getSystemLocale();
+        String systemLocale = LocaleUtils.getClosestSupportedLocale(getContext(), LocaleUtils.getDeviceLanguage().getId());
         String currentLocale = LocaleUtils.getCurrentLocale();
-        if (!currentLocale.equalsIgnoreCase(systemLocale)) {
-            setLanguage(LocaleUtils.getIndexForSupportedLocale(systemLocale), true);
-            return true;
-
-        } else {
+        if (currentLocale.equalsIgnoreCase(systemLocale)) {
             setLanguage(LocaleUtils.getIndexForSupportedLocale(systemLocale), false);
             return false;
+
+        } else {
+            setLanguage(LocaleUtils.getIndexForSupportedLocale(systemLocale), true);
+            return true;
         }
     }
 

app/src/common/shared/org/mozilla/vrbrowser/ui/widgets/settings/VoiceSearchLanguageOptionsView.java

@@ -57,8 +57,9 @@ private void initialize(Context aContext) {
 
     @Override
     protected boolean reset() {
+        String systemLocale = LocaleUtils.getClosestSupportedLocale(getContext(), LocaleUtils.getDeviceLanguage().getId());
         String value = LocaleUtils.getSupportedLocaleForIndex(mBinding.languageRadio.getCheckedRadioButtonId());
-        if (!value.equals(LocaleUtils.getSystemLocale())) {
+        if (!value.equals(systemLocale)) {
             setLanguage(LocaleUtils.getIndexForSupportedLocale(LocaleUtils.getSystemLocale()), true);
         }
 

app/src/common/shared/org/mozilla/vrbrowser/utils/LocaleUtils.java

@@ -64,14 +64,18 @@ private static HashMap<String, Language> getAllLanguages() {
     }
 
     public static void resetLanguages() {
-        String currentLocale = getCurrentLocale();
-        mLanguagesCache.values().stream().forEach((language) -> {
-            language.setPreferred(language.getId().equals(currentLocale));
+        mLanguagesCache.values().forEach((language) -> {
+            if (language == getDeviceLanguage()) {
+                language.setPreferred(true);
+
+            } else {
+                language.setPreferred(false);
+            }
         });
     }
 
-    public static Language getCurrentLocaleLanguage() {
-        return mLanguagesCache.get(getCurrentLocale());
+    public static Language getDeviceLanguage() {
+        return mLanguagesCache.get(Resources.getSystem().getConfiguration().getLocales().get(0).toLanguageTag());
     }
 
     public static List<String> getLocalesFromLanguages(@NonNull final List<Language> languages) {
@@ -99,7 +103,7 @@ public static List<Language> getPreferredLanguages(@NonNull Context aContext) {
             }
 
         } else {
-            Language currentLanguage = getCurrentLocaleLanguage();
+            Language currentLanguage = getDeviceLanguage();
             currentLanguage.setPreferred(true);
             preferredLanguages.add(currentLanguage);
         }
@@ -262,4 +266,37 @@ public static String getDefaultSupportedLocale() {
         return locale;
     }
 
+    public static String getClosestSupportedLocale(@NonNull Context context, @NonNull String languageTag) {
+        Locale locale = Locale.forLanguageTag(languageTag);
+        Optional<LocalizedLanguage> language = LocaleUtils.localizedSupportedLanguages.stream().filter(item ->
+                item.locale.equals(locale)
+        ).findFirst();
+
+        if (!language.isPresent()) {
+            language = LocaleUtils.localizedSupportedLanguages.stream().filter(item ->
+                    item.locale.getLanguage().equals(locale.getLanguage()) &&
+                            item.locale.getScript().equals(locale.getScript()) &&
+                            item.locale.getCountry().equals(locale.getCountry())
+            ).findFirst();
+        }
+        if (!language.isPresent()) {
+            language = LocaleUtils.localizedSupportedLanguages.stream().filter(item ->
+                    item.locale.getLanguage().equals(locale.getLanguage()) &&
+                            item.locale.getCountry().equals(locale.getCountry())
+            ).findFirst();
+        }
+        if (!language.isPresent()) {
+            language = LocaleUtils.localizedSupportedLanguages.stream().filter(item ->
+                    item.locale.getLanguage().equals(locale.getLanguage())
+            ).findFirst();
+        }
+
+        if (language.isPresent()) {
+            return language.get().locale.toLanguageTag();
+
+        } else {
+            return getDisplayLocale(context);
+        }
+    }
+
 }