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      1 /*
      2  * Copyright (C) 2018 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.security;
     18 
     19 import static android.app.admin.DevicePolicyManager.PASSWORD_QUALITY_SOMETHING;
     20 
     21 import android.content.Context;
     22 import android.os.UserHandle;
     23 import android.os.UserManager;
     24 import android.support.v7.preference.Preference;
     25 import android.support.v7.preference.PreferenceScreen;
     26 import android.util.Log;
     27 
     28 import com.android.internal.widget.LockPatternUtils;
     29 import com.android.settings.Utils;
     30 import com.android.settings.core.TogglePreferenceController;
     31 import com.android.settings.overlay.FeatureFactory;
     32 import com.android.settingslib.core.lifecycle.Lifecycle;
     33 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     34 import com.android.settingslib.core.lifecycle.events.OnResume;
     35 
     36 import java.util.concurrent.ExecutionException;
     37 import java.util.concurrent.FutureTask;
     38 
     39 public class VisiblePatternProfilePreferenceController extends TogglePreferenceController
     40         implements LifecycleObserver, OnResume {
     41 
     42     private static final String KEY_VISIBLE_PATTERN_PROFILE = "visiblepattern_profile";
     43     private static final String TAG = "VisPtnProfPrefCtrl";
     44 
     45     private final LockPatternUtils mLockPatternUtils;
     46     private final UserManager mUm;
     47     private final int mUserId = UserHandle.myUserId();
     48     private final int mProfileChallengeUserId;
     49 
     50     private Preference mPreference;
     51 
     52     public VisiblePatternProfilePreferenceController(Context context) {
     53         this(context, null /* lifecycle */);
     54     }
     55 
     56     // TODO (b/73074893) Replace this constructor without Lifecycle using setter method instead.
     57     public VisiblePatternProfilePreferenceController(Context context, Lifecycle lifecycle) {
     58         super(context, KEY_VISIBLE_PATTERN_PROFILE);
     59         mUm = (UserManager) context.getSystemService(Context.USER_SERVICE);
     60         mLockPatternUtils = FeatureFactory.getFactory(context)
     61                 .getSecurityFeatureProvider()
     62                 .getLockPatternUtils(context);
     63         mProfileChallengeUserId = Utils.getManagedProfileId(mUm, mUserId);
     64         if (lifecycle != null) {
     65             lifecycle.addObserver(this);
     66         }
     67     }
     68 
     69     @Override
     70     public int getAvailabilityStatus() {
     71         final FutureTask<Integer> futureTask = new FutureTask<>(
     72                 // Put the API call in a future to avoid StrictMode violation.
     73                 () -> {
     74                     final boolean isSecure = mLockPatternUtils.isSecure(mProfileChallengeUserId);
     75                     final boolean hasPassword = mLockPatternUtils
     76                             .getKeyguardStoredPasswordQuality(mProfileChallengeUserId)
     77                             == PASSWORD_QUALITY_SOMETHING;
     78                     if (isSecure && hasPassword) {
     79                         return AVAILABLE;
     80                     }
     81                     return DISABLED_FOR_USER;
     82                 });
     83         try {
     84             futureTask.run();
     85             return futureTask.get();
     86         } catch (InterruptedException | ExecutionException e) {
     87             Log.w(TAG, "Error getting lock pattern state.");
     88             return DISABLED_FOR_USER;
     89         }
     90     }
     91 
     92     @Override
     93     public boolean isChecked() {
     94         return mLockPatternUtils.isVisiblePatternEnabled(
     95                 mProfileChallengeUserId);
     96     }
     97 
     98     @Override
     99     public boolean setChecked(boolean isChecked) {
    100         if (Utils.startQuietModeDialogIfNecessary(mContext, mUm, mProfileChallengeUserId)) {
    101             return false;
    102         }
    103         mLockPatternUtils.setVisiblePatternEnabled(isChecked, mProfileChallengeUserId);
    104         return true;
    105     }
    106 
    107     @Override
    108     public void displayPreference(PreferenceScreen screen) {
    109         super.displayPreference(screen);
    110         mPreference = screen.findPreference(getPreferenceKey());
    111     }
    112 
    113     @Override
    114     public void onResume() {
    115         mPreference.setVisible(isAvailable());
    116     }
    117 }
    118