1 /*
2  * Copyright 2019 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 package com.android.car.developeroptions.connecteddevice;
17 
18 import android.content.Context;
19 import android.content.pm.PackageManager;
20 
21 import androidx.annotation.VisibleForTesting;
22 import androidx.preference.Preference;
23 import androidx.preference.PreferenceGroup;
24 import androidx.preference.PreferenceScreen;
25 
26 import com.android.car.developeroptions.bluetooth.BluetoothDeviceUpdater;
27 import com.android.car.developeroptions.bluetooth.SavedBluetoothDeviceUpdater;
28 import com.android.car.developeroptions.connecteddevice.dock.DockUpdater;
29 import com.android.car.developeroptions.core.BasePreferenceController;
30 import com.android.car.developeroptions.dashboard.DashboardFragment;
31 import com.android.car.developeroptions.overlay.FeatureFactory;
32 import com.android.settingslib.core.lifecycle.LifecycleObserver;
33 import com.android.settingslib.core.lifecycle.events.OnStart;
34 import com.android.settingslib.core.lifecycle.events.OnStop;
35 
36 public class PreviouslyConnectedDevicePreferenceController extends BasePreferenceController
37         implements LifecycleObserver, OnStart, OnStop, DevicePreferenceCallback {
38 
39     private static final int MAX_DEVICE_NUM = 3;
40 
41     private PreferenceGroup mPreferenceGroup;
42     private BluetoothDeviceUpdater mBluetoothDeviceUpdater;
43     private DockUpdater mSavedDockUpdater;
44     private int mPreferenceSize;
45 
PreviouslyConnectedDevicePreferenceController(Context context, String preferenceKey)46     public PreviouslyConnectedDevicePreferenceController(Context context, String preferenceKey) {
47         super(context, preferenceKey);
48 
49         mSavedDockUpdater = FeatureFactory.getFactory(
50                 context).getDockUpdaterFeatureProvider().getSavedDockUpdater(context, this);
51     }
52 
53     @Override
getAvailabilityStatus()54     public int getAvailabilityStatus() {
55         return mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)
56                 ? AVAILABLE
57                 : CONDITIONALLY_UNAVAILABLE;
58     }
59 
60     @Override
displayPreference(PreferenceScreen screen)61     public void displayPreference(PreferenceScreen screen) {
62         super.displayPreference(screen);
63         mPreferenceGroup = screen.findPreference(getPreferenceKey());
64         mPreferenceGroup.setVisible(false);
65 
66         if (isAvailable()) {
67             final Context context = screen.getContext();
68             mBluetoothDeviceUpdater.setPrefContext(context);
69             mSavedDockUpdater.setPreferenceContext(context);
70         }
71     }
72 
73     @Override
onStart()74     public void onStart() {
75         mBluetoothDeviceUpdater.registerCallback();
76         mSavedDockUpdater.registerCallback();
77     }
78 
79     @Override
onStop()80     public void onStop() {
81         mBluetoothDeviceUpdater.unregisterCallback();
82         mSavedDockUpdater.unregisterCallback();
83     }
84 
init(DashboardFragment fragment)85     public void init(DashboardFragment fragment) {
86         mBluetoothDeviceUpdater = new SavedBluetoothDeviceUpdater(fragment.getContext(),
87                 fragment, PreviouslyConnectedDevicePreferenceController.this);
88     }
89 
90     @Override
onDeviceAdded(Preference preference)91     public void onDeviceAdded(Preference preference) {
92         mPreferenceSize++;
93         if (mPreferenceSize <= MAX_DEVICE_NUM) {
94             mPreferenceGroup.addPreference(preference);
95         }
96         updatePreferenceVisiblity();
97     }
98 
99     @Override
onDeviceRemoved(Preference preference)100     public void onDeviceRemoved(Preference preference) {
101         mPreferenceSize--;
102         mPreferenceGroup.removePreference(preference);
103         updatePreferenceVisiblity();
104     }
105 
106     @VisibleForTesting
setBluetoothDeviceUpdater(BluetoothDeviceUpdater bluetoothDeviceUpdater)107     void setBluetoothDeviceUpdater(BluetoothDeviceUpdater bluetoothDeviceUpdater) {
108         mBluetoothDeviceUpdater = bluetoothDeviceUpdater;
109     }
110 
111     @VisibleForTesting
setSavedDockUpdater(DockUpdater savedDockUpdater)112     void setSavedDockUpdater(DockUpdater savedDockUpdater) {
113         mSavedDockUpdater = savedDockUpdater;
114     }
115 
116     @VisibleForTesting
setPreferenceGroup(PreferenceGroup preferenceGroup)117     void setPreferenceGroup(PreferenceGroup preferenceGroup) {
118         mPreferenceGroup = preferenceGroup;
119     }
120 
121     @VisibleForTesting
updatePreferenceVisiblity()122     void updatePreferenceVisiblity() {
123         mPreferenceGroup.setVisible(mPreferenceSize > 0);
124     }
125 }
126