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 android.car.cluster;
18 
19 import android.car.Car;
20 import android.car.CarOccupantZoneManager;
21 import android.content.Context;
22 import android.hardware.display.DisplayManager.DisplayListener;
23 import android.util.Log;
24 import android.view.Display;
25 
26 import com.android.internal.util.Preconditions;
27 
28 /**
29  * This class provides a display for instrument cluster renderer.
30  * <p>
31  * By default it will try to provide physical secondary display if it is connected, if secondary
32  * display is not connected during creation of this class then it will wait for the display will
33  * be added.
34  */
35 public class ClusterDisplayProvider {
36     private static final String TAG = "Cluster.DisplayProvider";
37     private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
38 
39     private final DisplayListener mListener;
40     private final Car mCar;
41     private CarOccupantZoneManager mOccupantZoneManager;
42 
43     private int mClusterDisplayId = Display.INVALID_DISPLAY;
44 
ClusterDisplayProvider(Context context, DisplayListener clusterDisplayListener)45     ClusterDisplayProvider(Context context, DisplayListener clusterDisplayListener) {
46         mListener = clusterDisplayListener;
47         mCar = Car.createCar(context, null, Car.CAR_WAIT_TIMEOUT_WAIT_FOREVER,
48                 (car, ready) -> {
49                     if (!ready) return;
50                     initClusterDisplayProvider(context, (CarOccupantZoneManager) car.getCarManager(
51                             Car.CAR_OCCUPANT_ZONE_SERVICE));
52                 });
53     }
54 
release()55     void release() {
56         if (mCar != null && mCar.isConnected()) {
57             mCar.disconnect();
58         }
59     }
60 
initClusterDisplayProvider( Context context, CarOccupantZoneManager occupantZoneManager)61     private void initClusterDisplayProvider(
62             Context context, CarOccupantZoneManager occupantZoneManager) {
63         Preconditions.checkArgument(
64                 occupantZoneManager != null,"Can't get CarOccupantZoneManager");
65         mOccupantZoneManager = occupantZoneManager;
66         checkClusterDisplayChanged();
67         mOccupantZoneManager.registerOccupantZoneConfigChangeListener(
68                 new ClusterDisplayChangeListener());
69     }
70 
checkClusterDisplayChanged()71     private void checkClusterDisplayChanged() {
72         int clusterDisplayId = getClusterDisplayId();
73         if (clusterDisplayId == mClusterDisplayId) {
74             return;
75         }
76         if (mClusterDisplayId != Display.INVALID_DISPLAY) {
77             Log.i(TAG, "Cluster display is removed");
78             mListener.onDisplayRemoved(mClusterDisplayId);
79         }
80         mClusterDisplayId = clusterDisplayId;
81         if (clusterDisplayId != Display.INVALID_DISPLAY) {
82             Log.i(TAG, "Found cluster displayId=" + clusterDisplayId);
83             mListener.onDisplayAdded(clusterDisplayId);
84         }
85     }
86 
getClusterDisplayId()87     private int getClusterDisplayId() {
88         return mOccupantZoneManager.getDisplayIdForDriver(
89                 CarOccupantZoneManager.DISPLAY_TYPE_INSTRUMENT_CLUSTER);
90     }
91 
92     private final class ClusterDisplayChangeListener implements
93             CarOccupantZoneManager.OccupantZoneConfigChangeListener {
94         @Override
onOccupantZoneConfigChanged(int changeFlags)95         public void onOccupantZoneConfigChanged(int changeFlags) {
96             if (DEBUG) Log.d(TAG, "onOccupantZoneConfigChanged changeFlags=" + changeFlags);
97             if ((changeFlags & CarOccupantZoneManager.ZONE_CONFIG_CHANGE_FLAG_DISPLAY) == 0) {
98                 return;
99             }
100             checkClusterDisplayChanged();
101         }
102     }
103 
104     @Override
toString()105     public String toString() {
106         return getClass().getSimpleName() + "{"
107                 + " clusterDisplayId = " + mClusterDisplayId
108                 + "}";
109     }
110 }