content: /*
   * 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.amnesica.kryptey.inputmethod.latin.settings;
  
  import android.os.Build;
  import android.preference.CheckBoxPreference;
  import android.preference.Preference;
  import android.preference.PreferenceGroup;
  import android.preference.SwitchPreference;
  
  import java.util.ArrayList;
  
  public class TwoStatePreferenceHelper {
    private static final String EMPTY_TEXT = "";
  
    private TwoStatePreferenceHelper() {
      // This utility class is not publicly instantiable.
    }
  
    public static void replaceCheckBoxPreferencesBySwitchPreferences(final PreferenceGroup group) {
      // The keyboard settings keeps using a CheckBoxPreference on KitKat or previous.
      if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
        return;
      }
      // The keyboard settings starts using a SwitchPreference without switch on/off text on
      // API versions newer than KitKat.
      replaceAllCheckBoxPreferencesBySwitchPreferences(group);
    }
  
    private static void replaceAllCheckBoxPreferencesBySwitchPreferences(
        final PreferenceGroup group) {
      final ArrayList<Preference> preferences = new ArrayList<>();
      final int count = group.getPreferenceCount();
      for (int index = 0; index < count; index++) {
        preferences.add(group.getPreference(index));
      }
      group.removeAll();
      for (int index = 0; index < count; index++) {
        final Preference preference = preferences.get(index);
        if (preference instanceof CheckBoxPreference) {
          addSwitchPreferenceBasedOnCheckBoxPreference((CheckBoxPreference) preference, group);
        } else {
          group.addPreference(preference);
          if (preference instanceof PreferenceGroup) {
            replaceAllCheckBoxPreferencesBySwitchPreferences((PreferenceGroup) preference);
          }
        }
      }
    }
  
    static void addSwitchPreferenceBasedOnCheckBoxPreference(final CheckBoxPreference checkBox,
                                                             final PreferenceGroup group) {
      final SwitchPreference switchPref = new SwitchPreference(checkBox.getContext());
      switchPref.setTitle(checkBox.getTitle());
      switchPref.setKey(checkBox.getKey());
      switchPref.setOrder(checkBox.getOrder());
      switchPref.setPersistent(checkBox.isPersistent());
      switchPref.setEnabled(checkBox.isEnabled());
      switchPref.setChecked(checkBox.isChecked());
      switchPref.setSummary(checkBox.getSummary());
      switchPref.setSummaryOn(checkBox.getSummaryOn());
      switchPref.setSummaryOff(checkBox.getSummaryOff());
      switchPref.setSwitchTextOn(EMPTY_TEXT);
      switchPref.setSwitchTextOff(EMPTY_TEXT);
      group.addPreference(switchPref);
      switchPref.setDependency(checkBox.getDependency());
    }
  }
  