1 /*
2  * Copyright (C) 2020 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.car.systembar;
18 
19 import android.app.ActivityTaskManager;
20 import android.util.Log;
21 
22 import com.android.systemui.dagger.SysUISingleton;
23 import com.android.systemui.shared.system.TaskStackChangeListener;
24 
25 /**
26  * An implementation of TaskStackChangeListener, that listens for changes in the system
27  * task stack and notifies the navigation bar.
28  */
29 @SysUISingleton
30 class ButtonSelectionStateListener implements TaskStackChangeListener {
31     private static final String TAG = ButtonSelectionStateListener.class.getSimpleName();
32 
33     /* Visible so that subclasses can make calls to this controller. */
34     protected final ButtonSelectionStateController mButtonSelectionStateController;
35 
ButtonSelectionStateListener(ButtonSelectionStateController carSystemButtonController)36     ButtonSelectionStateListener(ButtonSelectionStateController carSystemButtonController) {
37         mButtonSelectionStateController = carSystemButtonController;
38     }
39 
40     @Override
onTaskStackChanged()41     public void onTaskStackChanged() {
42         try {
43             mButtonSelectionStateController.taskChanged(
44                     ActivityTaskManager.getService().getAllRootTaskInfos());
45         } catch (Exception e) {
46             Log.e(TAG, "Getting RootTaskInfo from activity task manager failed", e);
47         }
48     }
49 
50     @Override
onTaskDisplayChanged(int taskId, int newDisplayId)51     public void onTaskDisplayChanged(int taskId, int newDisplayId) {
52         try {
53             mButtonSelectionStateController.taskChanged(
54                     ActivityTaskManager.getService().getAllRootTaskInfos());
55         } catch (Exception e) {
56             Log.e(TAG, "Getting RootTaskInfo from activity task manager failed", e);
57         }
58 
59     }
60 }
61