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[android-x86/packages-apps-Settings.git] / src / com / android / settings / inputmethod / PhysicalKeyboardPreferenceController.java
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
17 package com.android.settings.inputmethod;
18
19 import android.content.Context;
20 import android.hardware.input.InputManager;
21 import android.support.v7.preference.Preference;
22
23 import com.android.settings.R;
24 import com.android.settings.core.PreferenceControllerMixin;
25 import com.android.settings.inputmethod.PhysicalKeyboardFragment.HardKeyboardDeviceInfo;
26 import com.android.settingslib.core.AbstractPreferenceController;
27 import com.android.settingslib.core.lifecycle.Lifecycle;
28 import com.android.settingslib.core.lifecycle.LifecycleObserver;
29 import com.android.settingslib.core.lifecycle.events.OnPause;
30 import com.android.settingslib.core.lifecycle.events.OnResume;
31
32 import java.util.List;
33
34 public class PhysicalKeyboardPreferenceController extends AbstractPreferenceController
35         implements PreferenceControllerMixin, LifecycleObserver, OnResume, OnPause,
36         InputManager.InputDeviceListener {
37
38     private final InputManager mIm;
39
40     private Preference mPreference;
41
42     public PhysicalKeyboardPreferenceController(Context context, Lifecycle lifecycle) {
43         super(context);
44         mIm = (InputManager) context.getSystemService(Context.INPUT_SERVICE);
45
46         if (lifecycle != null) {
47             lifecycle.addObserver(this);
48         }
49     }
50
51     @Override
52     public boolean isAvailable() {
53         return mContext.getResources().getBoolean(R.bool.config_show_physical_keyboard_pref);
54     }
55
56     @Override
57     public void updateState(Preference preference) {
58         mPreference = preference;
59         updateSummary();
60     }
61
62     @Override
63     public String getPreferenceKey() {
64         return "physical_keyboard_pref";
65     }
66
67     @Override
68     public void onPause() {
69         mIm.registerInputDeviceListener(this, null);
70     }
71
72     @Override
73     public void onResume() {
74         mIm.unregisterInputDeviceListener(this);
75     }
76
77     @Override
78     public void onInputDeviceAdded(int deviceId) {
79         updateSummary();
80     }
81
82     @Override
83     public void onInputDeviceRemoved(int deviceId) {
84         updateSummary();
85     }
86
87     @Override
88     public void onInputDeviceChanged(int deviceId) {
89         updateSummary();
90     }
91
92     private void updateSummary() {
93         if (mPreference == null) {
94             return;
95         }
96         final List<HardKeyboardDeviceInfo> keyboards =
97                 PhysicalKeyboardFragment.getHardKeyboards();
98         if (keyboards.isEmpty()) {
99             mPreference.setSummary(R.string.disconnected);
100             return;
101         }
102         String summary = null;
103         for (HardKeyboardDeviceInfo info : keyboards) {
104             if (summary == null) {
105                 summary = info.mDeviceName;
106             } else {
107                 summary = mContext.getString(R.string.join_many_items_middle, summary,
108                         info.mDeviceName);
109             }
110         }
111         mPreference.setSummary(summary);
112     }
113 }