1 /*
2  * Copyright (C) 2022 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.settings.inputmethod;
18 
19 import android.content.Context;
20 import android.hardware.input.InputManager;
21 
22 import androidx.preference.Preference;
23 
24 import com.android.settings.R;
25 import com.android.settings.core.BasePreferenceController;
26 import com.android.settings.core.PreferenceControllerMixin;
27 import com.android.settings.inputmethod.PhysicalKeyboardFragment.HardKeyboardDeviceInfo;
28 import com.android.settingslib.core.lifecycle.LifecycleObserver;
29 import com.android.settingslib.core.lifecycle.events.OnStart;
30 import com.android.settingslib.core.lifecycle.events.OnStop;
31 
32 import java.util.List;
33 
34 public class KeyboardPreferenceController extends BasePreferenceController
35         implements PreferenceControllerMixin, LifecycleObserver, OnStart, OnStop,
36         InputManager.InputDeviceListener {
37 
38     private final InputManager mIm;
39 
40     private Preference mPreference;
41 
KeyboardPreferenceController(Context context, String key)42     public KeyboardPreferenceController(Context context, String key) {
43         super(context, key);
44         mIm = context.getSystemService(InputManager.class);
45     }
46 
47     @Override
onInputDeviceAdded(int deviceId)48     public void onInputDeviceAdded(int deviceId) {
49         updateSummary();
50     }
51 
52     @Override
onInputDeviceRemoved(int deviceId)53     public void onInputDeviceRemoved(int deviceId) {
54         updateSummary();
55     }
56 
57     @Override
onInputDeviceChanged(int deviceId)58     public void onInputDeviceChanged(int deviceId) {
59         updateSummary();
60     }
61 
62     @Override
onStart()63     public void onStart() {
64         mIm.registerInputDeviceListener(this, null);
65     }
66 
67     @Override
onStop()68     public void onStop() {
69         mIm.unregisterInputDeviceListener(this);
70     }
71 
72     @Override
updateState(Preference preference)73     public void updateState(Preference preference) {
74         mPreference = preference;
75         updateSummary();
76     }
77 
78     @Override
getAvailabilityStatus()79     public int getAvailabilityStatus() {
80         return AVAILABLE;
81     }
82 
updateSummary()83     private void updateSummary() {
84         if (mPreference == null) {
85             return;
86         }
87         final List<HardKeyboardDeviceInfo> keyboards =
88                 PhysicalKeyboardFragment.getHardKeyboards(mContext);
89         if (keyboards.isEmpty()) {
90             mPreference.setSummary(R.string.keyboard_settings_summary);
91         } else {
92             mPreference.setSummary(R.string.keyboard_settings_with_physical_keyboard_summary);
93         }
94     }
95 }