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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 
     17 package com.android.settings.users;
     18 
     19 import android.app.admin.DevicePolicyManager;
     20 import android.content.Context;
     21 import android.content.pm.UserInfo;
     22 import android.os.UserHandle;
     23 import android.os.UserManager;
     24 import android.provider.Settings;
     25 import com.android.settings.Utils;
     26 import com.android.settingslib.RestrictedLockUtils;
     27 
     28 public class UserCapabilities {
     29     boolean mEnabled = true;
     30     boolean mCanAddUser = true;
     31     boolean mCanAddRestrictedProfile = true;
     32     boolean mIsAdmin;
     33     boolean mIsGuest;
     34     boolean mCanAddGuest;
     35     boolean mDisallowAddUser;
     36     boolean mDisallowAddUserSetByAdmin;
     37     RestrictedLockUtils.EnforcedAdmin mEnforcedAdmin;
     38 
     39     private UserCapabilities() {}
     40 
     41     public static UserCapabilities create(Context context) {
     42         UserManager userManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
     43         UserCapabilities caps = new UserCapabilities();
     44         if (!UserManager.supportsMultipleUsers() || Utils.isMonkeyRunning()) {
     45             caps.mEnabled = false;
     46             return caps;
     47         }
     48 
     49         final UserInfo myUserInfo = userManager.getUserInfo(UserHandle.myUserId());
     50         caps.mIsGuest = myUserInfo.isGuest();
     51         caps.mIsAdmin = myUserInfo.isAdmin();
     52         DevicePolicyManager dpm = (DevicePolicyManager) context.getSystemService(
     53                 Context.DEVICE_POLICY_SERVICE);
     54         // No restricted profiles for tablets with a device owner, or phones.
     55         if (dpm.isDeviceManaged() || Utils.isVoiceCapable(context)) {
     56             caps.mCanAddRestrictedProfile = false;
     57         }
     58         caps.updateAddUserCapabilities(context);
     59         return caps;
     60     }
     61 
     62     public void updateAddUserCapabilities(Context context) {
     63         mEnforcedAdmin = RestrictedLockUtils.checkIfRestrictionEnforced(context,
     64                 UserManager.DISALLOW_ADD_USER, UserHandle.myUserId());
     65         final boolean hasBaseUserRestriction = RestrictedLockUtils.hasBaseUserRestriction(
     66                 context, UserManager.DISALLOW_ADD_USER, UserHandle.myUserId());
     67         mDisallowAddUserSetByAdmin =
     68                 mEnforcedAdmin != null && !hasBaseUserRestriction;
     69         mDisallowAddUser =
     70                 (mEnforcedAdmin != null || hasBaseUserRestriction);
     71         mCanAddUser = true;
     72         if (!mIsAdmin || UserManager.getMaxSupportedUsers() < 2
     73                 || !UserManager.supportsMultipleUsers()
     74                 || mDisallowAddUser) {
     75             mCanAddUser = false;
     76         }
     77 
     78         final boolean canAddUsersWhenLocked = mIsAdmin || Settings.Global.getInt(
     79                 context.getContentResolver(), Settings.Global.ADD_USERS_WHEN_LOCKED, 0) == 1;
     80         mCanAddGuest = !mIsGuest && !mDisallowAddUser && canAddUsersWhenLocked;
     81     }
     82 
     83     public boolean isAdmin() {
     84         return mIsAdmin;
     85     }
     86 
     87     public boolean disallowAddUser() {
     88         return mDisallowAddUser;
     89     }
     90 
     91     public boolean disallowAddUserSetByAdmin() {
     92         return mDisallowAddUserSetByAdmin;
     93     }
     94 
     95     public RestrictedLockUtils.EnforcedAdmin getEnforcedAdmin() {
     96         return mEnforcedAdmin;
     97     }
     98 
     99 
    100     @Override
    101     public String toString() {
    102         return "UserCapabilities{" +
    103                 "mEnabled=" + mEnabled +
    104                 ", mCanAddUser=" + mCanAddUser +
    105                 ", mCanAddRestrictedProfile=" + mCanAddRestrictedProfile +
    106                 ", mIsAdmin=" + mIsAdmin +
    107                 ", mIsGuest=" + mIsGuest +
    108                 ", mCanAddGuest=" + mCanAddGuest +
    109                 ", mDisallowAddUser=" + mDisallowAddUser +
    110                 ", mEnforcedAdmin=" + mEnforcedAdmin +
    111                 '}';
    112     }
    113 }
    114