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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"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 package com.android.settings.location;
     15 
     16 import android.content.BroadcastReceiver;
     17 import android.content.Context;
     18 import android.content.Intent;
     19 import android.content.IntentFilter;
     20 import android.location.SettingInjectorService;
     21 import android.os.UserHandle;
     22 import android.support.annotation.VisibleForTesting;
     23 import android.support.v7.preference.Preference;
     24 import android.support.v7.preference.PreferenceCategory;
     25 import android.support.v7.preference.PreferenceScreen;
     26 import android.util.Log;
     27 
     28 import com.android.settings.widget.RestrictedAppPreference;
     29 import com.android.settingslib.core.lifecycle.Lifecycle;
     30 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     31 import com.android.settingslib.core.lifecycle.events.OnPause;
     32 import com.android.settingslib.core.lifecycle.events.OnResume;
     33 
     34 import java.util.List;
     35 
     36 public class LocationServicePreferenceController extends LocationBasePreferenceController
     37         implements LifecycleObserver, OnResume, OnPause {
     38 
     39     private static final String TAG = "LocationServicePrefCtrl";
     40     /** Key for preference category "Location services" */
     41     private static final String KEY_LOCATION_SERVICES = "location_services";
     42     @VisibleForTesting
     43     static final IntentFilter INTENT_FILTER_INJECTED_SETTING_CHANGED =
     44             new IntentFilter(SettingInjectorService.ACTION_INJECTED_SETTING_CHANGED);
     45 
     46     private PreferenceCategory mCategoryLocationServices;
     47     private final LocationSettings mFragment;
     48     private final SettingsInjector mInjector;
     49     /** Receives UPDATE_INTENT  */
     50     @VisibleForTesting
     51     BroadcastReceiver mInjectedSettingsReceiver;
     52 
     53     public LocationServicePreferenceController(Context context, LocationSettings fragment,
     54             Lifecycle lifecycle) {
     55         this(context, fragment, lifecycle, new SettingsInjector(context));
     56     }
     57 
     58     @VisibleForTesting
     59     LocationServicePreferenceController(Context context, LocationSettings fragment,
     60             Lifecycle lifecycle, SettingsInjector injector) {
     61         super(context, lifecycle);
     62         mFragment = fragment;
     63         mInjector = injector;
     64         if (lifecycle != null) {
     65             lifecycle.addObserver(this);
     66         }
     67     }
     68 
     69     @Override
     70     public String getPreferenceKey() {
     71         return KEY_LOCATION_SERVICES;
     72     }
     73 
     74     @Override
     75     public boolean isAvailable() {
     76         // If managed profile has lock-down on location access then its injected location services
     77         // must not be shown.
     78         return mInjector.hasInjectedSettings(mLocationEnabler.isManagedProfileRestrictedByBase()
     79                 ? UserHandle.myUserId() : UserHandle.USER_CURRENT);
     80     }
     81 
     82     @Override
     83     public void displayPreference(PreferenceScreen screen) {
     84         super.displayPreference(screen);
     85         mCategoryLocationServices =
     86                 (PreferenceCategory) screen.findPreference(KEY_LOCATION_SERVICES);
     87     }
     88 
     89     @Override
     90     public void updateState(Preference preference) {
     91         mCategoryLocationServices.removeAll();
     92         final List<Preference> prefs = getLocationServices();
     93         for (Preference pref : prefs) {
     94             if (pref instanceof RestrictedAppPreference) {
     95                 ((RestrictedAppPreference) pref).checkRestrictionAndSetDisabled();
     96             }
     97         }
     98         LocationSettings.addPreferencesSorted(prefs, mCategoryLocationServices);
     99     }
    100 
    101     @Override
    102     public void onLocationModeChanged(int mode, boolean restricted) {
    103         // As a safety measure, also reloads on location mode change to ensure the settings are
    104         // up-to-date even if an affected app doesn't send the setting changed broadcast.
    105         mInjector.reloadStatusMessages();
    106     }
    107 
    108     @Override
    109     public void onResume() {
    110         if (mInjectedSettingsReceiver == null) {
    111             mInjectedSettingsReceiver = new BroadcastReceiver() {
    112                 @Override
    113                 public void onReceive(Context context, Intent intent) {
    114                     if (Log.isLoggable(TAG, Log.DEBUG)) {
    115                         Log.d(TAG, "Received settings change intent: " + intent);
    116                     }
    117                     mInjector.reloadStatusMessages();
    118                 }
    119             };
    120         }
    121         mContext.registerReceiver(
    122                 mInjectedSettingsReceiver, INTENT_FILTER_INJECTED_SETTING_CHANGED);
    123     }
    124 
    125     @Override
    126     public void onPause() {
    127         mContext.unregisterReceiver(mInjectedSettingsReceiver);
    128     }
    129 
    130     private List<Preference> getLocationServices() {
    131         // If location access is locked down by device policy then we only show injected settings
    132         // for the primary profile.
    133         return mInjector.getInjectedSettings(mFragment.getPreferenceManager().getContext(),
    134                 mLocationEnabler.isManagedProfileRestrictedByBase()
    135                         ? UserHandle.myUserId() : UserHandle.USER_CURRENT);
    136     }
    137 }
    138