Home | History | Annotate | Download | only in assist 
      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.net.Uri;
     22 import android.os.UserHandle;
     23 import android.provider.Settings;
     24 import android.support.v7.preference.Preference;
     25 import android.support.v7.preference.PreferenceScreen;
     26 import android.support.v7.preference.TwoStatePreference;
     27 
     28 import com.android.internal.annotations.VisibleForTesting;
     29 import com.android.internal.app.AssistUtils;
     30 import com.android.settings.core.PreferenceController;
     31 import com.android.settings.core.lifecycle.Lifecycle;
     32 import com.android.settings.core.lifecycle.LifecycleObserver;
     33 import com.android.settings.core.lifecycle.events.OnPause;
     34 import com.android.settings.core.lifecycle.events.OnResume;
     35 
     36 import java.util.Arrays;
     37 import java.util.List;
     38 
     39 public class AssistFlashScreenPreferenceController extends PreferenceController
     40         implements Preference.OnPreferenceChangeListener, LifecycleObserver, OnResume, OnPause {
     41 
     42     private static final String KEY_FLASH = "flash";
     43 
     44     private final AssistUtils mAssistUtils;
     45     private final SettingObserver mSettingObserver;
     46     private PreferenceScreen mScreen;
     47     private Preference mPreference;
     48 
     49     public AssistFlashScreenPreferenceController(Context context, Lifecycle lifecycle) {
     50         super(context);
     51         mAssistUtils = new AssistUtils(context);
     52         mSettingObserver = new SettingObserver();
     53 
     54         if (lifecycle != null) {
     55             lifecycle.addObserver(this);
     56         }
     57     }
     58 
     59     @Override
     60     public boolean isAvailable() {
     61         return getCurrentAssist() != null && allowDisablingAssistDisclosure();
     62     }
     63 
     64     @Override
     65     public String getPreferenceKey() {
     66         return KEY_FLASH;
     67     }
     68 
     69     @Override
     70     public void displayPreference(PreferenceScreen screen) {
     71         mScreen = screen;
     72         mPreference = screen.findPreference(getPreferenceKey());
     73         super.displayPreference(screen);
     74     }
     75 
     76     @Override
     77     public void onResume() {
     78         mSettingObserver.register(mContext.getContentResolver(), true);
     79         updatePreference();
     80     }
     81 
     82     @Override
     83     public void updateState(Preference preference) {
     84         updatePreference();
     85     }
     86 
     87     @Override
     88     public void onPause() {
     89         mSettingObserver.register(mContext.getContentResolver(), false);
     90     }
     91 
     92     @Override
     93     public boolean onPreferenceChange(Preference preference, Object newValue) {
     94         Settings.Secure.putInt(mContext.getContentResolver(),
     95                 Settings.Secure.ASSIST_DISCLOSURE_ENABLED,
     96                 (boolean) newValue ? 1 : 0);
     97         return true;
     98     }
     99 
    100     private void updatePreference() {
    101         if (mPreference == null || !(mPreference instanceof TwoStatePreference)) {
    102             return;
    103         }
    104         if (isAvailable()) {
    105             if (mScreen.findPreference(getPreferenceKey()) == null) {
    106                 // add it if it's not on scree
    107                 mScreen.addPreference(mPreference);
    108             }
    109         } else {
    110             mScreen.removePreference(mPreference);
    111         }
    112         ComponentName assistant = getCurrentAssist();
    113 
    114         boolean isContextChecked = AssistContextPreferenceController.isChecked(mContext);
    115 
    116         mPreference.setEnabled(isContextChecked && isPreInstalledAssistant(assistant));
    117         ((TwoStatePreference) mPreference).setChecked(willShowFlash(assistant));
    118     }
    119 
    120     @VisibleForTesting
    121     boolean willShowFlash(ComponentName assistant) {
    122         return AssistUtils.shouldDisclose(mContext, assistant);
    123     }
    124 
    125     @VisibleForTesting
    126     boolean isPreInstalledAssistant(ComponentName assistant) {
    127         return AssistUtils.isPreinstalledAssistant(mContext, assistant);
    128     }
    129 
    130     @VisibleForTesting
    131     boolean allowDisablingAssistDisclosure() {
    132         return AssistUtils.allowDisablingAssistDisclosure(mContext);
    133     }
    134 
    135     private ComponentName getCurrentAssist() {
    136         return mAssistUtils.getAssistComponentForUser(UserHandle.myUserId());
    137     }
    138 
    139     class SettingObserver extends AssistSettingObserver {
    140 
    141         private final Uri URI =
    142                 Settings.Secure.getUriFor(Settings.Secure.ASSIST_DISCLOSURE_ENABLED);
    143         private final Uri CONTEXT_URI =
    144                 Settings.Secure.getUriFor(Settings.Secure.ASSIST_STRUCTURE_ENABLED);
    145 
    146         @Override
    147         protected List<Uri> getSettingUris() {
    148             return Arrays.asList(URI, CONTEXT_URI);
    149         }
    150 
    151         @Override
    152         public void onSettingChange() {
    153             updatePreference();
    154         }
    155     }
    156 
    157 
    158 }
    159