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      1 /*
      2  * Copyright (C) 2017 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.security;
     17 
     18 import android.app.Fragment;
     19 import android.content.Context;
     20 import android.os.UserHandle;
     21 import android.support.annotation.VisibleForTesting;
     22 import android.support.v7.preference.Preference;
     23 import android.support.v7.preference.Preference.OnPreferenceClickListener;
     24 import android.support.v7.preference.PreferenceScreen;
     25 import com.android.internal.widget.LockPatternUtils;
     26 import com.android.settings.OwnerInfoSettings;
     27 import com.android.settings.core.PreferenceController;
     28 import com.android.settings.core.lifecycle.Lifecycle;
     29 import com.android.settings.core.lifecycle.LifecycleObserver;
     30 import com.android.settings.core.lifecycle.events.OnResume;
     31 import com.android.settingslib.RestrictedLockUtils;
     32 import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
     33 import com.android.settingslib.RestrictedPreference;
     34 
     35 public class OwnerInfoPreferenceController extends PreferenceController
     36         implements LifecycleObserver, OnResume {
     37 
     38     private static final String KEY_OWNER_INFO = "owner_info_settings";
     39     private static final int MY_USER_ID = UserHandle.myUserId();
     40 
     41     private final LockPatternUtils mLockPatternUtils;
     42     private final Fragment mParent;
     43     private RestrictedPreference mOwnerInfoPref;
     44 
     45     // Container fragment should implement this in order to show the correct summary
     46     public interface OwnerInfoCallback {
     47         public void onOwnerInfoUpdated();
     48     }
     49 
     50     public OwnerInfoPreferenceController(Context context, Fragment parent, Lifecycle lifecycle ) {
     51         super(context);
     52         mParent = parent;
     53         mLockPatternUtils = new LockPatternUtils(context);
     54         if (lifecycle != null) {
     55             lifecycle.addObserver(this);
     56         }
     57     }
     58 
     59     @Override
     60     public void displayPreference(PreferenceScreen screen) {
     61         mOwnerInfoPref  = (RestrictedPreference) screen.findPreference(KEY_OWNER_INFO);
     62     }
     63 
     64     @Override
     65     public void onResume() {
     66         updateEnableState();
     67         updateSummary();
     68     }
     69 
     70     @Override
     71     public boolean isAvailable() {
     72         return true;
     73     }
     74 
     75     @Override
     76     public String getPreferenceKey() {
     77         return KEY_OWNER_INFO;
     78     }
     79 
     80     public void updateEnableState() {
     81         if (mOwnerInfoPref == null) {
     82             return;
     83         }
     84         if (isDeviceOwnerInfoEnabled()) {
     85             EnforcedAdmin admin = getDeviceOwner();
     86             mOwnerInfoPref.setDisabledByAdmin(admin);
     87         } else {
     88             mOwnerInfoPref.setDisabledByAdmin(null);
     89             mOwnerInfoPref.setEnabled(!mLockPatternUtils.isLockScreenDisabled(MY_USER_ID));
     90             if (mOwnerInfoPref.isEnabled()) {
     91                 mOwnerInfoPref.setOnPreferenceClickListener(
     92                     new OnPreferenceClickListener() {
     93                         @Override
     94                         public boolean onPreferenceClick(Preference preference) {
     95                             OwnerInfoSettings.show(mParent);
     96                             return true;
     97                         }
     98                     });
     99             }
    100         }
    101     }
    102 
    103     public void updateSummary() {
    104         if (mOwnerInfoPref != null) {
    105             if (isDeviceOwnerInfoEnabled()) {
    106                 mOwnerInfoPref.setSummary(
    107                     getDeviceOwnerInfo());
    108             } else {
    109                 mOwnerInfoPref.setSummary(isOwnerInfoEnabled()
    110                     ? getOwnerInfo()
    111                     : mContext.getString(
    112                         com.android.settings.R.string.owner_info_settings_summary));
    113             }
    114         }
    115     }
    116 
    117     // Wrapper methods to allow testing
    118     @VisibleForTesting
    119     boolean isDeviceOwnerInfoEnabled() {
    120         return mLockPatternUtils.isDeviceOwnerInfoEnabled();
    121     }
    122 
    123     @VisibleForTesting
    124     String getDeviceOwnerInfo() {
    125         return mLockPatternUtils.getDeviceOwnerInfo();
    126     }
    127 
    128     @VisibleForTesting
    129     boolean isOwnerInfoEnabled() {
    130         return mLockPatternUtils.isOwnerInfoEnabled(MY_USER_ID);
    131     }
    132 
    133     @VisibleForTesting
    134     String getOwnerInfo() {
    135         return mLockPatternUtils.getOwnerInfo(MY_USER_ID);
    136     }
    137 
    138     @VisibleForTesting
    139     EnforcedAdmin getDeviceOwner() {
    140         return RestrictedLockUtils.getDeviceOwner(mContext);
    141     }
    142 }
    143