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.net.Uri;
23 import android.support.v7.preference.Preference;
24 import android.support.v7.preference.PreferenceScreen;
25 import android.text.TextUtils;
26 
27 import com.android.internal.app.AssistUtils;
28 import com.android.settings.applications.defaultapps.DefaultAppInfo;
29 import com.android.settings.applications.defaultapps.DefaultAppPreferenceController;
30 import com.android.settings.core.lifecycle.Lifecycle;
31 import com.android.settings.core.lifecycle.LifecycleObserver;
32 import com.android.settings.core.lifecycle.events.OnPause;
33 import com.android.settings.core.lifecycle.events.OnResume;
34 
35 import java.util.List;
36 
37 public class DefaultVoiceInputPreferenceController extends DefaultAppPreferenceController
38         implements LifecycleObserver, OnResume, OnPause {
39 
40     private static final String KEY_VOICE_INPUT = "voice_input_settings";
41 
42     private VoiceInputHelper mHelper;
43     private AssistUtils mAssistUtils;
44     private PreferenceScreen mScreen;
45     private Preference mPreference;
46     private SettingObserver mSettingObserver;
47 
DefaultVoiceInputPreferenceController(Context context, Lifecycle lifecycle)48     public DefaultVoiceInputPreferenceController(Context context, Lifecycle lifecycle) {
49         super(context);
50         mSettingObserver = new SettingObserver();
51         mAssistUtils = new AssistUtils(context);
52         mHelper = new VoiceInputHelper(context);
53         mHelper.buildUi();
54         if (lifecycle != null) {
55             lifecycle.addObserver(this);
56         }
57     }
58 
59     @Override
isAvailable()60     public boolean isAvailable() {
61         // If current assist is also voice service, don't show voice preference.
62         final ComponentName currentVoiceService =
63                 DefaultVoiceInputPicker.getCurrentService(mHelper);
64         final ComponentName currentAssist =
65                 mAssistUtils.getAssistComponentForUser(mUserId);
66         return !DefaultVoiceInputPicker.isCurrentAssistVoiceService(
67                 currentAssist, currentVoiceService);
68     }
69 
70     @Override
getPreferenceKey()71     public String getPreferenceKey() {
72         return KEY_VOICE_INPUT;
73     }
74 
75     @Override
displayPreference(PreferenceScreen screen)76     public void displayPreference(PreferenceScreen screen) {
77         mScreen = screen;
78         mPreference = screen.findPreference(getPreferenceKey());
79         super.displayPreference(screen);
80     }
81 
82     @Override
onResume()83     public void onResume() {
84         mSettingObserver.register(mContext.getContentResolver(), true);
85         updatePreference();
86     }
87 
88     @Override
updateState(Preference preference)89     public void updateState(Preference preference) {
90         super.updateState(mPreference);
91         updatePreference();
92     }
93 
94     @Override
onPause()95     public void onPause() {
96         mSettingObserver.register(mContext.getContentResolver(), false);
97     }
98 
99     @Override
getDefaultAppInfo()100     protected DefaultAppInfo getDefaultAppInfo() {
101         final String defaultKey = getDefaultAppKey();
102         if (defaultKey == null) {
103             return null;
104         }
105         for (VoiceInputHelper.InteractionInfo info : mHelper.mAvailableInteractionInfos) {
106             if (TextUtils.equals(defaultKey, info.key)) {
107                 return new DefaultVoiceInputPicker.VoiceInputDefaultAppInfo(mPackageManager,
108                         mUserId, info, true /* enabled */);
109             }
110         }
111 
112         for (VoiceInputHelper.RecognizerInfo info : mHelper.mAvailableRecognizerInfos) {
113             if (TextUtils.equals(defaultKey, info.key)) {
114                 return new DefaultVoiceInputPicker.VoiceInputDefaultAppInfo(mPackageManager,
115                         mUserId, info, true /* enabled */);
116             }
117         }
118         return null;
119     }
120 
121     @Override
getSettingIntent(DefaultAppInfo info)122     protected Intent getSettingIntent(DefaultAppInfo info) {
123         final DefaultAppInfo appInfo = getDefaultAppInfo();
124         if (appInfo == null
125                 || !(appInfo instanceof DefaultVoiceInputPicker.VoiceInputDefaultAppInfo)) {
126             return null;
127         }
128         return ((DefaultVoiceInputPicker.VoiceInputDefaultAppInfo) appInfo).getSettingIntent();
129     }
130 
updatePreference()131     private void updatePreference() {
132         if (mPreference == null) {
133             return;
134         }
135         mHelper.buildUi();
136         if (isAvailable()) {
137             if (mScreen.findPreference(getPreferenceKey()) == null) {
138                 // add it if it's not on scree
139                 mScreen.addPreference(mPreference);
140             }
141         } else {
142             mScreen.removePreference(mPreference);
143         }
144     }
145 
getDefaultAppKey()146     private String getDefaultAppKey() {
147         final ComponentName currentService = DefaultVoiceInputPicker.getCurrentService(mHelper);
148         if (currentService == null) {
149             return null;
150         }
151         return currentService.flattenToShortString();
152     }
153 
154     class SettingObserver extends AssistSettingObserver {
155         @Override
getSettingUris()156         protected List<Uri> getSettingUris() {
157             return null;
158         }
159 
160         @Override
onSettingChange()161         public void onSettingChange() {
162             updatePreference();
163         }
164     }
165 }
166