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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.notification;
     18 
     19 import android.app.NotificationChannel;
     20 import android.app.NotificationManager;
     21 import android.content.Context;
     22 import android.provider.Settings;
     23 import android.support.v7.preference.Preference;
     24 
     25 import com.android.settings.core.PreferenceControllerMixin;
     26 import com.android.settingslib.RestrictedSwitchPreference;
     27 import com.android.settingslib.core.lifecycle.Lifecycle;
     28 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     29 import com.android.settingslib.core.lifecycle.events.OnResume;
     30 
     31 public class LightsPreferenceController extends NotificationPreferenceController
     32         implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener {
     33 
     34     private static final String KEY_LIGHTS = "lights";
     35 
     36     public LightsPreferenceController(Context context, NotificationBackend backend) {
     37         super(context, backend);
     38     }
     39 
     40     @Override
     41     public String getPreferenceKey() {
     42         return KEY_LIGHTS;
     43     }
     44 
     45     @Override
     46     public boolean isAvailable() {
     47         if (!super.isAvailable()) {
     48             return false;
     49         }
     50         if (mChannel == null) {
     51             return false;
     52         }
     53         return checkCanBeVisible(NotificationManager.IMPORTANCE_DEFAULT)
     54                 && canPulseLight()
     55                 && !isDefaultChannel();
     56     }
     57 
     58     public void updateState(Preference preference) {
     59         if (mChannel != null) {
     60             RestrictedSwitchPreference pref = (RestrictedSwitchPreference) preference;
     61             pref.setDisabledByAdmin(mAdmin);
     62             pref.setEnabled(isChannelConfigurable() && !pref.isDisabledByAdmin());
     63             pref.setChecked(mChannel.shouldShowLights());
     64         }
     65     }
     66 
     67     @Override
     68     public boolean onPreferenceChange(Preference preference, Object newValue) {
     69         if (mChannel != null) {
     70             final boolean lights = (Boolean) newValue;
     71             mChannel.enableLights(lights);
     72             saveChannel();
     73         }
     74         return true;
     75     }
     76 
     77     boolean canPulseLight() {
     78         if (!mContext.getResources()
     79                 .getBoolean(com.android.internal.R.bool.config_intrusiveNotificationLed)) {
     80             return false;
     81         }
     82         return Settings.System.getInt(mContext.getContentResolver(),
     83                 Settings.System.NOTIFICATION_LIGHT_PULSE, 0) == 1;
     84     }
     85 
     86 }
     87