1 /*
2  * Copyright (C) 2017 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.settings.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.settings.bluetooth.BluetoothDeviceUpdater;
27 import com.android.settings.bluetooth.SavedBluetoothDeviceUpdater;
28 import com.android.settings.connecteddevice.dock.DockUpdater;
29 import com.android.settings.core.BasePreferenceController;
30 import com.android.settings.core.PreferenceControllerMixin;
31 import com.android.settings.dashboard.DashboardFragment;
32 import com.android.settings.overlay.DockUpdaterFeatureProvider;
33 import com.android.settings.overlay.FeatureFactory;
34 import com.android.settingslib.core.lifecycle.LifecycleObserver;
35 import com.android.settingslib.core.lifecycle.events.OnStart;
36 import com.android.settingslib.core.lifecycle.events.OnStop;
37 
38 /**
39  * Controller to maintain the {@link PreferenceGroup} for all
40  * saved devices. It uses {@link DevicePreferenceCallback} to add/remove {@link Preference}
41  */
42 public class SavedDeviceGroupController extends BasePreferenceController
43         implements PreferenceControllerMixin, LifecycleObserver, OnStart, OnStop,
44         DevicePreferenceCallback {
45 
46     private static final String KEY = "saved_device_list";
47 
48     @VisibleForTesting
49     PreferenceGroup mPreferenceGroup;
50     private BluetoothDeviceUpdater mBluetoothDeviceUpdater;
51     private DockUpdater mSavedDockUpdater;
52 
SavedDeviceGroupController(Context context)53     public SavedDeviceGroupController(Context context) {
54         super(context, KEY);
55 
56         DockUpdaterFeatureProvider dockUpdaterFeatureProvider =
57                 FeatureFactory.getFactory(context).getDockUpdaterFeatureProvider();
58         mSavedDockUpdater =
59                 dockUpdaterFeatureProvider.getSavedDockUpdater(context, this);
60     }
61 
62     @Override
onStart()63     public void onStart() {
64         mBluetoothDeviceUpdater.registerCallback();
65         mSavedDockUpdater.registerCallback();
66     }
67 
68     @Override
onStop()69     public void onStop() {
70         mBluetoothDeviceUpdater.unregisterCallback();
71         mSavedDockUpdater.unregisterCallback();
72     }
73 
74     @Override
displayPreference(PreferenceScreen screen)75     public void displayPreference(PreferenceScreen screen) {
76         mPreferenceGroup = screen.findPreference(KEY);
77         mPreferenceGroup.setVisible(false);
78 
79         if (isAvailable()) {
80             final Context context = screen.getContext();
81             mBluetoothDeviceUpdater.setPrefContext(context);
82             mBluetoothDeviceUpdater.forceUpdate();
83             mSavedDockUpdater.setPreferenceContext(context);
84             mSavedDockUpdater.forceUpdate();
85         }
86     }
87 
88     @Override
getAvailabilityStatus()89     public int getAvailabilityStatus() {
90         return (mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)
91                 || mSavedDockUpdater != null)
92                 ? AVAILABLE
93                 : UNSUPPORTED_ON_DEVICE;
94     }
95 
96     @Override
getPreferenceKey()97     public String getPreferenceKey() {
98         return KEY;
99     }
100 
101     @Override
onDeviceAdded(Preference preference)102     public void onDeviceAdded(Preference preference) {
103         if (mPreferenceGroup.getPreferenceCount() == 0) {
104             mPreferenceGroup.setVisible(true);
105         }
106         mPreferenceGroup.addPreference(preference);
107     }
108 
109     @Override
onDeviceRemoved(Preference preference)110     public void onDeviceRemoved(Preference preference) {
111         mPreferenceGroup.removePreference(preference);
112         if (mPreferenceGroup.getPreferenceCount() == 0) {
113             mPreferenceGroup.setVisible(false);
114         }
115     }
116 
init(DashboardFragment fragment)117     public void init(DashboardFragment fragment) {
118         mBluetoothDeviceUpdater = new SavedBluetoothDeviceUpdater(fragment.getContext(),
119                 fragment, SavedDeviceGroupController.this);
120     }
121 
122     @VisibleForTesting
setBluetoothDeviceUpdater(BluetoothDeviceUpdater bluetoothDeviceUpdater)123     public void setBluetoothDeviceUpdater(BluetoothDeviceUpdater bluetoothDeviceUpdater) {
124         mBluetoothDeviceUpdater = bluetoothDeviceUpdater;
125     }
126 
127     @VisibleForTesting
setSavedDockUpdater(DockUpdater savedDockUpdater)128     public void setSavedDockUpdater(DockUpdater savedDockUpdater) {
129         mSavedDockUpdater = savedDockUpdater;
130     }
131 }
132