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      1 /*
      2  * Copyright (C) 2014 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.systemui.statusbar.policy;
     18 
     19 import android.app.ActivityManager;
     20 import android.content.Context;
     21 import android.os.RemoteException;
     22 import android.view.WindowManagerGlobal;
     23 
     24 import com.android.keyguard.KeyguardUpdateMonitor;
     25 import com.android.keyguard.KeyguardUpdateMonitorCallback;
     26 import com.android.systemui.settings.CurrentUserTracker;
     27 
     28 import java.util.ArrayList;
     29 
     30 public final class KeyguardMonitor extends KeyguardUpdateMonitorCallback {
     31 
     32     private final ArrayList<Callback> mCallbacks = new ArrayList<Callback>();
     33 
     34     private final Context mContext;
     35     private final CurrentUserTracker mUserTracker;
     36     private final KeyguardUpdateMonitor mKeyguardUpdateMonitor;
     37 
     38     private int mCurrentUser;
     39     private boolean mShowing;
     40     private boolean mSecure;
     41     private boolean mCanSkipBouncer;
     42 
     43     private boolean mListening;
     44 
     45     public KeyguardMonitor(Context context) {
     46         mContext = context;
     47         mKeyguardUpdateMonitor = KeyguardUpdateMonitor.getInstance(mContext);
     48         mUserTracker = new CurrentUserTracker(mContext) {
     49             @Override
     50             public void onUserSwitched(int newUserId) {
     51                 mCurrentUser = newUserId;
     52                 updateCanSkipBouncerState();
     53             }
     54         };
     55     }
     56 
     57     public void addCallback(Callback callback) {
     58         mCallbacks.add(callback);
     59         if (mCallbacks.size() != 0 && !mListening) {
     60             mListening = true;
     61             mCurrentUser = ActivityManager.getCurrentUser();
     62             updateCanSkipBouncerState();
     63             mKeyguardUpdateMonitor.registerCallback(this);
     64             mUserTracker.startTracking();
     65         }
     66     }
     67 
     68     public void removeCallback(Callback callback) {
     69         if (mCallbacks.remove(callback) && mCallbacks.size() == 0 && mListening) {
     70             mListening = false;
     71             mKeyguardUpdateMonitor.removeCallback(this);
     72             mUserTracker.stopTracking();
     73         }
     74     }
     75 
     76     public boolean isShowing() {
     77         return mShowing;
     78     }
     79 
     80     public boolean isSecure() {
     81         return mSecure;
     82     }
     83 
     84     public boolean canSkipBouncer() {
     85         return mCanSkipBouncer;
     86     }
     87 
     88     public void unlock() {
     89         try {
     90             WindowManagerGlobal.getWindowManagerService().dismissKeyguard();
     91         } catch (RemoteException e) {
     92         }
     93     }
     94 
     95     public void lock() {
     96         try {
     97             WindowManagerGlobal.getWindowManagerService().lockNow(null /* options */);
     98         } catch (RemoteException e) {
     99         }
    100     }
    101 
    102     public void notifyKeyguardState(boolean showing, boolean secure) {
    103         if (mShowing == showing && mSecure == secure) return;
    104         mShowing = showing;
    105         mSecure = secure;
    106         notifyKeyguardChanged();
    107     }
    108 
    109     @Override
    110     public void onTrustChanged(int userId) {
    111         updateCanSkipBouncerState();
    112         notifyKeyguardChanged();
    113     }
    114 
    115     public boolean isDeviceInteractive() {
    116         return mKeyguardUpdateMonitor.isDeviceInteractive();
    117     }
    118 
    119     private void updateCanSkipBouncerState() {
    120         mCanSkipBouncer = mKeyguardUpdateMonitor.getUserCanSkipBouncer(mCurrentUser);
    121     }
    122 
    123     private void notifyKeyguardChanged() {
    124         for (Callback callback : mCallbacks) {
    125             callback.onKeyguardChanged();
    126         }
    127     }
    128 
    129     public interface Callback {
    130         void onKeyguardChanged();
    131     }
    132 }