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 AssistFlashScreenPreferenceController(Context context, Lifecycle lifecycle)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 isAvailable()60 public boolean isAvailable() { 61 return getCurrentAssist() != null && allowDisablingAssistDisclosure(); 62 } 63 64 @Override getPreferenceKey()65 public String getPreferenceKey() { 66 return KEY_FLASH; 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 mSettingObserver.register(mContext.getContentResolver(), true); 79 updatePreference(); 80 } 81 82 @Override updateState(Preference preference)83 public void updateState(Preference preference) { 84 updatePreference(); 85 } 86 87 @Override onPause()88 public void onPause() { 89 mSettingObserver.register(mContext.getContentResolver(), false); 90 } 91 92 @Override onPreferenceChange(Preference preference, Object newValue)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 updatePreference()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 willShowFlash(ComponentName assistant)121 boolean willShowFlash(ComponentName assistant) { 122 return AssistUtils.shouldDisclose(mContext, assistant); 123 } 124 125 @VisibleForTesting isPreInstalledAssistant(ComponentName assistant)126 boolean isPreInstalledAssistant(ComponentName assistant) { 127 return AssistUtils.isPreinstalledAssistant(mContext, assistant); 128 } 129 130 @VisibleForTesting allowDisablingAssistDisclosure()131 boolean allowDisablingAssistDisclosure() { 132 return AssistUtils.allowDisablingAssistDisclosure(mContext); 133 } 134 getCurrentAssist()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 getSettingUris()147 protected List<Uri> getSettingUris() { 148 return Arrays.asList(URI, CONTEXT_URI); 149 } 150 151 @Override onSettingChange()152 public void onSettingChange() { 153 updatePreference(); 154 } 155 } 156 157 158 } 159