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.applications.assist;
18 
19 import android.content.ComponentName;
20 import android.content.Context;
21 import android.content.Intent;
22 import android.content.pm.PackageManager;
23 import android.net.Uri;
24 import android.text.TextUtils;
25 
26 import androidx.preference.Preference;
27 import androidx.preference.PreferenceScreen;
28 
29 import com.android.settings.applications.defaultapps.DefaultAppPreferenceController;
30 import com.android.settingslib.applications.DefaultAppInfo;
31 import com.android.settingslib.core.lifecycle.Lifecycle;
32 import com.android.settingslib.core.lifecycle.LifecycleObserver;
33 import com.android.settingslib.core.lifecycle.events.OnPause;
34 import com.android.settingslib.core.lifecycle.events.OnResume;
35 
36 import java.util.List;
37 
38 public class DefaultVoiceInputPreferenceController extends DefaultAppPreferenceController
39         implements LifecycleObserver, OnResume, OnPause {
40 
41     private static final String KEY_VOICE_INPUT = "voice_input_settings";
42 
43     private VoiceInputHelper mHelper;
44     private PreferenceScreen mScreen;
45     private Preference mPreference;
46     private Context mContext;
47 
DefaultVoiceInputPreferenceController(Context context, Lifecycle lifecycle)48     public DefaultVoiceInputPreferenceController(Context context, Lifecycle lifecycle) {
49         super(context);
50         mContext = context;
51         mHelper = new VoiceInputHelper(context);
52         mHelper.buildUi();
53         if (lifecycle != null) {
54             lifecycle.addObserver(this);
55         }
56     }
57 
58     @Override
isAvailable()59     public boolean isAvailable() {
60         return mContext.getPackageManager().hasSystemFeature(
61                 PackageManager.FEATURE_VOICE_RECOGNIZERS);
62     }
63 
64     @Override
getPreferenceKey()65     public String getPreferenceKey() {
66         return KEY_VOICE_INPUT;
67     }
68 
69     @Override
displayPreference(PreferenceScreen screen)70     public void displayPreference(PreferenceScreen screen) {
71         mScreen = screen;
72         mPreference = screen.findPreference(getPreferenceKey());
73         super.displayPreference(screen);
74     }
75 
76     @Override
onResume()77     public void onResume() {
78         updatePreference();
79     }
80 
81     @Override
updateState(Preference preference)82     public void updateState(Preference preference) {
83         super.updateState(mPreference);
84         updatePreference();
85     }
86 
87     @Override
onPause()88     public void onPause() {}
89 
90     @Override
getDefaultAppInfo()91     protected DefaultAppInfo getDefaultAppInfo() {
92         final String defaultKey = getDefaultAppKey();
93         if (defaultKey == null) {
94             return null;
95         }
96 
97         for (VoiceInputHelper.RecognizerInfo info : mHelper.mAvailableRecognizerInfos) {
98             if (TextUtils.equals(defaultKey, info.key)) {
99                 return new DefaultVoiceInputPicker.VoiceInputDefaultAppInfo(mContext,
100                         mPackageManager, mUserId, info, true /* enabled */);
101             }
102         }
103         return null;
104     }
105 
106     @Override
getSettingIntent(DefaultAppInfo info)107     protected Intent getSettingIntent(DefaultAppInfo info) {
108         final DefaultAppInfo appInfo = getDefaultAppInfo();
109         if (appInfo == null
110                 || !(appInfo instanceof DefaultVoiceInputPicker.VoiceInputDefaultAppInfo)) {
111             return null;
112         }
113         return ((DefaultVoiceInputPicker.VoiceInputDefaultAppInfo) appInfo).getSettingIntent();
114     }
115 
updatePreference()116     private void updatePreference() {
117         if (mPreference == null) {
118             return;
119         }
120         mHelper.buildUi();
121         if (isAvailable()) {
122             if (mScreen.findPreference(getPreferenceKey()) == null) {
123                 // add it if it's not on scree
124                 mScreen.addPreference(mPreference);
125             }
126         } else {
127             mScreen.removePreference(mPreference);
128         }
129     }
130 
getDefaultAppKey()131     private String getDefaultAppKey() {
132         final ComponentName currentService = DefaultVoiceInputPicker.getCurrentService(mHelper);
133         if (currentService == null) {
134             return null;
135         }
136         return currentService.flattenToShortString();
137     }
138 }
139