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      1 /*
      2  * Copyright (C) 2016 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 package com.android.settings.accounts;
     17 
     18 import android.content.Context;
     19 import android.provider.Settings.Global;
     20 import android.support.v7.preference.Preference;
     21 
     22 import com.android.settings.core.PreferenceController;
     23 import com.android.settings.core.lifecycle.LifecycleObserver;
     24 import com.android.settings.core.lifecycle.events.OnPause;
     25 import com.android.settings.core.lifecycle.events.OnResume;
     26 import com.android.settings.users.UserCapabilities;
     27 import com.android.settingslib.RestrictedSwitchPreference;
     28 
     29 public class AddUserWhenLockedPreferenceController extends PreferenceController
     30         implements Preference.OnPreferenceChangeListener, LifecycleObserver, OnPause, OnResume {
     31 
     32     private static final String KEY_ADD_USER_WHEN_LOCKED = "add_users_when_locked";
     33 
     34     private RestrictedSwitchPreference mAddUserWhenLocked;
     35     private UserCapabilities mUserCaps;
     36     private boolean mShouldUpdateUserList;
     37 
     38     public AddUserWhenLockedPreferenceController(Context context) {
     39         super(context);
     40         mUserCaps = UserCapabilities.create(context);
     41     }
     42 
     43     @Override
     44     public void updateState(Preference preference) {
     45         RestrictedSwitchPreference restrictedSwitchPreference =
     46                 (RestrictedSwitchPreference) preference;
     47         int value = Global.getInt(mContext.getContentResolver(), Global.ADD_USERS_WHEN_LOCKED, 0);
     48         restrictedSwitchPreference.setChecked(value == 1);
     49         restrictedSwitchPreference.setDisabledByAdmin(
     50                 mUserCaps.disallowAddUser() ? mUserCaps.getEnforcedAdmin() : null);
     51     }
     52 
     53     @Override
     54     public boolean onPreferenceChange(Preference preference, Object newValue) {
     55         Boolean value = (Boolean) newValue;
     56         Global.putInt(mContext.getContentResolver(),
     57                 Global.ADD_USERS_WHEN_LOCKED, value != null && value ? 1 : 0);
     58         return true;
     59     }
     60 
     61     @Override
     62     public void onPause() {
     63         mShouldUpdateUserList = true;
     64     }
     65 
     66     @Override
     67     public void onResume() {
     68         if (mShouldUpdateUserList) {
     69             mUserCaps.updateAddUserCapabilities(mContext);
     70         }
     71     }
     72 
     73     @Override
     74     public boolean isAvailable() {
     75         return mUserCaps.isAdmin() &&
     76                 (!mUserCaps.disallowAddUser() || mUserCaps.disallowAddUserSetByAdmin());
     77     }
     78 
     79     @Override
     80     public String getPreferenceKey() {
     81         return KEY_ADD_USER_WHEN_LOCKED;
     82     }
     83 }
     84