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      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 
     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
     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
     71     public String getPreferenceKey() {
     72         return KEY_VOICE_INPUT;
     73     }
     74 
     75     @Override
     76     public void displayPreference(PreferenceScreen screen) {
     77         mScreen = screen;
     78         mPreference = screen.findPreference(getPreferenceKey());
     79         super.displayPreference(screen);
     80     }
     81 
     82     @Override
     83     public void onResume() {
     84         mSettingObserver.register(mContext.getContentResolver(), true);
     85         updatePreference();
     86     }
     87 
     88     @Override
     89     public void updateState(Preference preference) {
     90         super.updateState(mPreference);
     91         updatePreference();
     92     }
     93 
     94     @Override
     95     public void onPause() {
     96         mSettingObserver.register(mContext.getContentResolver(), false);
     97     }
     98 
     99     @Override
    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
    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 
    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 
    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
    156         protected List<Uri> getSettingUris() {
    157             return null;
    158         }
    159 
    160         @Override
    161         public void onSettingChange() {
    162             updatePreference();
    163         }
    164     }
    165 }
    166