Use fragment for multi lingual preference screen

Bug: 16522808
Change-Id: I0bfac43513e1fb85b5d4c07f56dd4c5b82f75ed1

1 files changed, 86 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/settings/MultiLingualSettingsFragment.java b/java/src/com/android/inputmethod/latin/settings/MultiLingualSettingsFragment.java
new file mode 100644
index 000000000..f40106ba9
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/settings/MultiLingualSettingsFragment.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.latin.settings;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.res.Resources;
+import android.os.Bundle;
+import android.preference.PreferenceScreen;
+import android.text.TextUtils;
+import android.view.inputmethod.InputMethodSubtype;
+
+import com.android.inputmethod.latin.R;
+import com.android.inputmethod.latin.utils.AdditionalSubtypeUtils;
+import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
+
+import java.util.ArrayList;
+
+/**
+ * "Multi lingual options" settings sub screen.
+ *
+ * This settings sub screen handles the following input preferences.
+ * - Language switch key
+ * - Switch to other input methods
+ * - Custom input styles
+ */
+public final class MultiLingualSettingsFragment extends SubScreenFragment {
+    @Override
+    public void onCreate(final Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.prefs_screen_multi_lingual);
+
+        final Context context = getActivity();
+
+        // When we are called from the Settings application but we are not already running, some
+        // singleton and utility classes may not have been initialized.  We have to call
+        // initialization method of these classes here. See {@link LatinIME#onCreate()}.
+        SubtypeLocaleUtils.init(context);
+
+        if (!Settings.ENABLE_SHOW_LANGUAGE_SWITCH_KEY_SETTINGS) {
+            removePreference(Settings.PREF_SHOW_LANGUAGE_SWITCH_KEY);
+            removePreference(Settings.PREF_INCLUDE_OTHER_IMES_IN_LANGUAGE_SWITCH_LIST);
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        updateCustomInputStylesSummary();
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(final SharedPreferences prefs, final String key) {
+        // Nothing to do here.
+    }
+
+    private void updateCustomInputStylesSummary() {
+        final SharedPreferences prefs = getSharedPreferences();
+        final Resources res = getResources();
+        final PreferenceScreen customInputStyles =
+                (PreferenceScreen)findPreference(Settings.PREF_CUSTOM_INPUT_STYLES);
+        final String prefSubtype = Settings.readPrefAdditionalSubtypes(prefs, res);
+        final InputMethodSubtype[] subtypes =
+                AdditionalSubtypeUtils.createAdditionalSubtypesArray(prefSubtype);
+        final ArrayList<String> subtypeNames = new ArrayList<>();
+        for (final InputMethodSubtype subtype : subtypes) {
+            subtypeNames.add(SubtypeLocaleUtils.getSubtypeDisplayNameInSystemLocale(subtype));
+        }
+        // TODO: A delimiter of custom input styles should be localized.
+        customInputStyles.setSummary(TextUtils.join(", ", subtypeNames));
+    }
+}