1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.car.developeroptions.widget; 18 19 import android.content.Context; 20 21 import com.android.car.developeroptions.core.BasePreferenceController; 22 import com.android.settingslib.core.AbstractPreferenceController; 23 24 import java.util.ArrayList; 25 import java.util.List; 26 27 /** 28 * A controller for generic Preference categories. If all controllers for its children reports 29 * not-available, this controller will also report not-available, and subsequently will be hidden by 30 * UI. 31 */ 32 public class PreferenceCategoryController extends BasePreferenceController { 33 34 private final String mKey; 35 private final List<AbstractPreferenceController> mChildren; 36 PreferenceCategoryController(Context context, String key)37 public PreferenceCategoryController(Context context, String key) { 38 super(context, key); 39 mKey = key; 40 mChildren = new ArrayList<>(); 41 } 42 43 @Override getAvailabilityStatus()44 public int getAvailabilityStatus() { 45 if (mChildren == null || mChildren.isEmpty()) { 46 return UNSUPPORTED_ON_DEVICE; 47 } 48 // Category is available if any child is available 49 for (AbstractPreferenceController controller : mChildren) { 50 if (controller.isAvailable()) { 51 return AVAILABLE; 52 } 53 } 54 return CONDITIONALLY_UNAVAILABLE; 55 } 56 57 @Override getPreferenceKey()58 public String getPreferenceKey() { 59 return mKey; 60 } 61 setChildren( List<AbstractPreferenceController> childrenController)62 public PreferenceCategoryController setChildren( 63 List<AbstractPreferenceController> childrenController) { 64 mChildren.clear(); 65 if (childrenController != null) { 66 mChildren.addAll(childrenController); 67 } 68 return this; 69 } 70 } 71