| /* |
| * Copyright (C) 2018 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.car.settings.users; |
| |
| import android.car.drivingstate.CarUxRestrictions; |
| import android.car.userlib.CarUserManagerHelper; |
| import android.content.Context; |
| import android.content.pm.UserInfo; |
| |
| import androidx.annotation.CallSuper; |
| import androidx.preference.Preference; |
| import androidx.preference.PreferenceGroup; |
| |
| import com.android.car.settings.common.FragmentController; |
| import com.android.car.settings.common.PreferenceController; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Objects; |
| |
| /** Shared business logic between {@link UsersListFragment} and {@link ChooseNewAdminFragment}. */ |
| public abstract class UsersBasePreferenceController extends PreferenceController<PreferenceGroup> { |
| |
| /** Update screen when users list is updated. */ |
| private final CarUserManagerHelper.OnUsersUpdateListener mOnUsersUpdateListener = |
| this::refreshUi; |
| |
| private UsersPreferenceProvider mPreferenceProvider; |
| private CarUserManagerHelper mCarUserManagerHelper; |
| private List<Preference> mUsersToDisplay = new ArrayList<>(); |
| |
| public UsersBasePreferenceController(Context context, String preferenceKey, |
| FragmentController fragmentController, CarUxRestrictions uxRestrictions) { |
| super(context, preferenceKey, fragmentController, uxRestrictions); |
| mCarUserManagerHelper = new CarUserManagerHelper(context); |
| UsersPreferenceProvider.UserClickListener userClickListener = this::userClicked; |
| mPreferenceProvider = new UsersPreferenceProvider(context, mCarUserManagerHelper, |
| userClickListener); |
| } |
| |
| @Override |
| protected Class<PreferenceGroup> getPreferenceType() { |
| return PreferenceGroup.class; |
| } |
| |
| /** |
| * Ensure that helper is set by the time onCreate is called. Register a listener to refresh |
| * screen on updates. |
| */ |
| @Override |
| @CallSuper |
| protected void onCreateInternal() { |
| mCarUserManagerHelper.registerOnUsersUpdateListener(mOnUsersUpdateListener); |
| } |
| |
| /** Unregister listener to refresh screen on updates. */ |
| @Override |
| @CallSuper |
| protected void onDestroyInternal() { |
| mCarUserManagerHelper.unregisterOnUsersUpdateListener(mOnUsersUpdateListener); |
| } |
| |
| @Override |
| protected void updateState(PreferenceGroup preferenceGroup) { |
| List<Preference> newUsers = mPreferenceProvider.createUserList(); |
| if (userListsAreDifferent(mUsersToDisplay, newUsers)) { |
| mUsersToDisplay = newUsers; |
| preferenceGroup.removeAll(); |
| |
| for (Preference preference : mUsersToDisplay) { |
| preferenceGroup.addPreference(preference); |
| } |
| } |
| } |
| |
| /** Gets the car user manager helper. */ |
| protected CarUserManagerHelper getCarUserManagerHelper() { |
| return mCarUserManagerHelper; |
| } |
| |
| /** Handles the user click on a preference for a certain user. */ |
| protected abstract void userClicked(UserInfo userInfo); |
| |
| |
| /** Gets the preference provider to set additional arguments if necessary. */ |
| protected UsersPreferenceProvider getPreferenceProvider() { |
| return mPreferenceProvider; |
| } |
| |
| private boolean userListsAreDifferent(List<Preference> currentList, |
| List<Preference> newList) { |
| if (currentList.size() != newList.size()) { |
| return true; |
| } |
| |
| for (int i = 0; i < currentList.size(); i++) { |
| // Cannot use "compareTo" on preference, since it uses the order attribute to compare. |
| if (preferencesAreDifferent(currentList.get(i), newList.get(i))) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| private boolean preferencesAreDifferent(Preference lhs, Preference rhs) { |
| return !Objects.equals(lhs.getTitle(), rhs.getTitle()) |
| || !Objects.equals(lhs.getSummary(), rhs.getSummary()); |
| } |
| } |