feat: add language selection

2 files changed, 191 insertions, 0 deletions

diff --git a/app/src/main/java/se/leap/bitmaskclient/base/fragments/LanguageSelectionFragment.java b/app/src/main/java/se/leap/bitmaskclient/base/fragments/LanguageSelectionFragment.java
new file mode 100644
index 00000000..263a8d46
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/base/fragments/LanguageSelectionFragment.java
@@ -0,0 +1,166 @@
+package se.leap.bitmaskclient.base.fragments;
+
+import static se.leap.bitmaskclient.base.utils.ViewHelper.setActionBarSubtitle;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatDelegate;
+import androidx.core.os.LocaleListCompat;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.google.android.material.bottomsheet.BottomSheetDialogFragment;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Locale;
+
+import se.leap.bitmaskclient.R;
+import se.leap.bitmaskclient.base.views.SimpleCheckBox;
+import se.leap.bitmaskclient.databinding.FLanguageSelectionBinding;
+import se.leap.bitmaskclient.databinding.VSelectTextListItemBinding;
+
+public class LanguageSelectionFragment extends BottomSheetDialogFragment {
+    static final String TAG = LanguageSelectionFragment.class.getSimpleName();
+    static final String SYSTEM_LOCALE = "systemLocale";
+    private FLanguageSelectionBinding binding;
+
+    public static LanguageSelectionFragment newInstance(Locale defaultLocale) {
+        LanguageSelectionFragment fragment = new LanguageSelectionFragment();
+        Bundle args = new Bundle();
+        args.putString(SYSTEM_LOCALE, defaultLocale.toLanguageTag());
+        fragment.setArguments(args);
+        return fragment;
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        binding = FLanguageSelectionBinding.inflate(inflater, container, false);
+        return binding.getRoot();
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        setActionBarSubtitle(this, R.string.select_language);
+
+        initRecyclerView(Arrays.asList(getResources().getStringArray(R.array.supported_languages)));
+    }
+
+    private static void customizeSelectionItem(VSelectTextListItemBinding binding) {
+        binding.title.setVisibility(View.GONE);
+        binding.bridgeImage.setVisibility(View.GONE);
+        binding.quality.setVisibility(View.GONE);
+    }
+
+    private void initRecyclerView(List<String> supportedLanguages) {
+        Locale defaultLocale = AppCompatDelegate.getApplicationLocales().get(0);
+        if (defaultLocale == null) {
+            defaultLocale = LocaleListCompat.getDefault().get(0);
+        }
+        // NOTE: Sort the supported languages by their display names.
+        // This would make updating supported languages easier as we don't have to tip toe around the order
+        Collections.sort(supportedLanguages, (lang1, lang2) -> {
+            String displayName1 = Locale.forLanguageTag(lang1).getDisplayName(Locale.ENGLISH);
+            String displayName2 = Locale.forLanguageTag(lang2).getDisplayName(Locale.ENGLISH);
+            return displayName1.compareTo(displayName2);
+        });
+        binding.languages.setAdapter(
+                new LanguageSelectionAdapter(supportedLanguages, this::updateLocale, defaultLocale)
+        );
+        binding.languages.setLayoutManager(new LinearLayoutManager(getContext()));
+    }
+
+    public static Locale getCurrentLocale() {
+        Locale defaultLocale = AppCompatDelegate.getApplicationLocales().get(0);
+        if (defaultLocale == null) {
+            defaultLocale = LocaleListCompat.getDefault().get(0);
+        }
+        return defaultLocale;
+    }
+
+    /**
+     * Update the locale of the application
+     *
+     * @param languageTag the language tag to set the locale to
+     */
+    private void updateLocale(String languageTag) {
+        if (languageTag.isEmpty()) {
+            AppCompatDelegate.setApplicationLocales(LocaleListCompat.getEmptyLocaleList());
+        } else {
+            AppCompatDelegate.setApplicationLocales(LocaleListCompat.forLanguageTags(languageTag));
+        }
+    }
+
+    /**
+     * Adapter for the language selection recycler view.
+     */
+    static class LanguageSelectionAdapter extends RecyclerView.Adapter<LanguageSelectionAdapter.LanguageViewHolder> {
+
+        private final List<String> languages;
+        private final LanguageClickListener clickListener;
+        private final Locale selectedLocale;
+
+        public LanguageSelectionAdapter(List<String> languages, LanguageClickListener clickListener, Locale defaultLocale) {
+            this.languages = languages;
+            this.clickListener = clickListener;
+            this.selectedLocale = defaultLocale;
+        }
+
+        @NonNull
+        @Override
+        public LanguageViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+            VSelectTextListItemBinding binding = VSelectTextListItemBinding.inflate(LayoutInflater.from(parent.getContext()), parent, false);
+            return new LanguageViewHolder(binding);
+        }
+
+        @Override
+        public void onBindViewHolder(@NonNull LanguageViewHolder holder, int position) {
+            String languageTag = languages.get(position);
+            holder.languageName.setText(Locale.forLanguageTag(languageTag).getDisplayName(Locale.ENGLISH));
+            if (languages.contains(selectedLocale.toLanguageTag())) {
+                holder.selected.setChecked(selectedLocale.toLanguageTag().equals(languageTag));
+            } else {
+                holder.selected.setChecked(selectedLocale.getLanguage().equals(languageTag));
+            }
+            holder.itemView.setOnClickListener(v -> clickListener.onLanguageClick(languageTag));
+        }
+
+        @Override
+        public int getItemCount() {
+            return languages.size();
+        }
+
+        /**
+         * View holder for the language item
+         */
+        static class LanguageViewHolder extends RecyclerView.ViewHolder {
+            TextView languageName;
+            SimpleCheckBox selected;
+
+            public LanguageViewHolder(@NonNull VSelectTextListItemBinding binding) {
+                super(binding.getRoot());
+                languageName = binding.location;
+                selected = binding.selected;
+                customizeSelectionItem(binding);
+            }
+        }
+    }
+
+
+    /**
+     * Interface for the language click listener
+     */
+    interface LanguageClickListener {
+        void onLanguageClick(String languageTag);
+    }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/base/fragments/NavigationDrawerFragment.java b/app/src/main/java/se/leap/bitmaskclient/base/fragments/NavigationDrawerFragment.java
index cbab1d32..41e102bb 100644
--- a/app/src/main/java/se/leap/bitmaskclient/base/fragments/NavigationDrawerFragment.java
+++ b/app/src/main/java/se/leap/bitmaskclient/base/fragments/NavigationDrawerFragment.java
@@ -46,15 +46,19 @@ import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.graphics.drawable.DrawerArrowDrawable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.core.content.ContextCompat;
+import androidx.core.os.LocaleListCompat;
 import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.fragment.app.Fragment;
 
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
+import java.util.Locale;
+import java.util.Map;
 
 import se.leap.bitmaskclient.BuildConfig;
 import se.leap.bitmaskclient.R;
@@ -211,6 +215,7 @@ public class NavigationDrawerFragment extends Fragment implements SharedPreferen
         initSwitchProviderEntry();
         initSaveBatteryEntry();
         initManualGatewayEntry();
+        initLanguageSettingsEntry();
         initAdvancedSettingsEntry();
         initDonateEntry();
         initLogEntry();
@@ -314,6 +319,26 @@ public class NavigationDrawerFragment extends Fragment implements SharedPreferen
         });
     }
 
+
+    private void initLanguageSettingsEntry() {
+        IconTextEntry languageSwitcher = drawerView.findViewById(R.id.language_switcher);
+
+        Locale currentLocale = LanguageSelectionFragment.getCurrentLocale();
+        languageSwitcher.setSubtitle(currentLocale.getDisplayName(Locale.ENGLISH));
+
+        languageSwitcher.setOnClickListener(v -> {
+            FragmentManagerEnhanced fragmentManager = new FragmentManagerEnhanced(getActivity().getSupportFragmentManager());
+            closeDrawer();
+            Fragment current = fragmentManager.findFragmentByTag(MainActivity.TAG);
+            if (current instanceof LanguageSelectionFragment) {
+                return;
+            }
+            Fragment fragment = LanguageSelectionFragment.newInstance(Locale.getDefault());
+            setDrawerToggleColor(drawerView.getContext(), ContextCompat.getColor(drawerView.getContext(), R.color.colorActionBarTitleFont));
+            fragmentManager.replace(R.id.main_container, fragment, MainActivity.TAG);
+        });
+    }
+
     private void initDonateEntry() {
         if (ENABLE_DONATION) {
             IconTextEntry donate = drawerView.findViewById(R.id.donate);