Home | History | Annotate | Download | only in policy 
      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 mOccluded;
     42     private boolean mCanSkipBouncer;
     43 
     44     private boolean mListening;
     45 
     46     public KeyguardMonitor(Context context) {
     47         mContext = context;
     48         mKeyguardUpdateMonitor = KeyguardUpdateMonitor.getInstance(mContext);
     49         mUserTracker = new CurrentUserTracker(mContext) {
     50             @Override
     51             public void onUserSwitched(int newUserId) {
     52                 mCurrentUser = newUserId;
     53                 updateCanSkipBouncerState();
     54             }
     55         };
     56     }
     57 
     58     public void addCallback(Callback callback) {
     59         mCallbacks.add(callback);
     60         if (mCallbacks.size() != 0 && !mListening) {
     61             mListening = true;
     62             mCurrentUser = ActivityManager.getCurrentUser();
     63             updateCanSkipBouncerState();
     64             mKeyguardUpdateMonitor.registerCallback(this);
     65             mUserTracker.startTracking();
     66         }
     67     }
     68 
     69     public void removeCallback(Callback callback) {
     70         if (mCallbacks.remove(callback) && mCallbacks.size() == 0 && mListening) {
     71             mListening = false;
     72             mKeyguardUpdateMonitor.removeCallback(this);
     73             mUserTracker.stopTracking();
     74         }
     75     }
     76 
     77     public boolean isShowing() {
     78         return mShowing;
     79     }
     80 
     81     public boolean isSecure() {
     82         return mSecure;
     83     }
     84 
     85     public boolean isOccluded() {
     86         return mOccluded;
     87     }
     88 
     89     public boolean canSkipBouncer() {
     90         return mCanSkipBouncer;
     91     }
     92 
     93     public void unlock() {
     94         try {
     95             WindowManagerGlobal.getWindowManagerService().dismissKeyguard();
     96         } catch (RemoteException e) {
     97         }
     98     }
     99 
    100     public void lock() {
    101         try {
    102             WindowManagerGlobal.getWindowManagerService().lockNow(null /* options */);
    103         } catch (RemoteException e) {
    104         }
    105     }
    106 
    107     public void notifyKeyguardState(boolean showing, boolean secure, boolean occluded) {
    108         if (mShowing == showing && mSecure == secure && mOccluded == occluded) return;
    109         mShowing = showing;
    110         mSecure = secure;
    111         mOccluded = occluded;
    112         notifyKeyguardChanged();
    113     }
    114 
    115     @Override
    116     public void onTrustChanged(int userId) {
    117         updateCanSkipBouncerState();
    118         notifyKeyguardChanged();
    119     }
    120 
    121     public boolean isDeviceInteractive() {
    122         return mKeyguardUpdateMonitor.isDeviceInteractive();
    123     }
    124 
    125     private void updateCanSkipBouncerState() {
    126         mCanSkipBouncer = mKeyguardUpdateMonitor.getUserCanSkipBouncer(mCurrentUser);
    127     }
    128 
    129     private void notifyKeyguardChanged() {
    130         for (Callback callback : mCallbacks) {
    131             callback.onKeyguardChanged();
    132         }
    133     }
    134 
    135     public interface Callback {
    136         void onKeyguardChanged();
    137     }
    138 }