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      1 /*
      2  * Copyright (C) 2016 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 
     15 package com.android.systemui.tuner;
     16 
     17 import android.content.Context;
     18 import android.provider.Settings;
     19 import android.support.v7.preference.DropDownPreference;
     20 import android.text.TextUtils;
     21 import android.util.ArraySet;
     22 import android.util.AttributeSet;
     23 import com.android.internal.logging.MetricsLogger;
     24 import com.android.internal.logging.MetricsProto.MetricsEvent;
     25 import com.android.systemui.statusbar.phone.StatusBarIconController;
     26 
     27 import static com.android.systemui.BatteryMeterDrawable.SHOW_PERCENT_SETTING;
     28 
     29 public class BatteryPreference extends DropDownPreference implements TunerService.Tunable {
     30 
     31     private static final String PERCENT = "percent";
     32     private static final String DEFAULT = "default";
     33     private static final String DISABLED = "disabled";
     34 
     35     private final String mBattery;
     36     private boolean mBatteryEnabled;
     37     private boolean mHasPercentage;
     38     private ArraySet<String> mBlacklist;
     39     private boolean mHasSetValue;
     40 
     41     public BatteryPreference(Context context, AttributeSet attrs) {
     42         super(context, attrs);
     43         mBattery = context.getString(com.android.internal.R.string.status_bar_battery);
     44         setEntryValues(new CharSequence[] {PERCENT, DEFAULT, DISABLED });
     45     }
     46 
     47     @Override
     48     public void onAttached() {
     49         super.onAttached();
     50         mHasPercentage = Settings.System.getInt(getContext().getContentResolver(),
     51                 SHOW_PERCENT_SETTING, 0) != 0;
     52         TunerService.get(getContext()).addTunable(this, StatusBarIconController.ICON_BLACKLIST);
     53     }
     54 
     55     @Override
     56     public void onDetached() {
     57         TunerService.get(getContext()).removeTunable(this);
     58         super.onDetached();
     59     }
     60 
     61     @Override
     62     public void onTuningChanged(String key, String newValue) {
     63         if (StatusBarIconController.ICON_BLACKLIST.equals(key)) {
     64             mBlacklist = StatusBarIconController.getIconBlacklist(newValue);
     65             mBatteryEnabled = !mBlacklist.contains(mBattery);
     66         }
     67         if (!mHasSetValue) {
     68             // Because of the complicated tri-state it can end up looping and setting state back to
     69             // what the user didn't choose.  To avoid this, just set the state once and rely on the
     70             // preference to handle updates.
     71             mHasSetValue = true;
     72             if (mBatteryEnabled && mHasPercentage) {
     73                 setValue(PERCENT);
     74             } else if (mBatteryEnabled) {
     75                 setValue(DEFAULT);
     76             } else {
     77                 setValue(DISABLED);
     78             }
     79         }
     80     }
     81 
     82     @Override
     83     protected boolean persistString(String value) {
     84         final boolean v = PERCENT.equals(value);
     85         MetricsLogger.action(getContext(), MetricsEvent.TUNER_BATTERY_PERCENTAGE, v);
     86         Settings.System.putInt(getContext().getContentResolver(), SHOW_PERCENT_SETTING, v ? 1 : 0);
     87         if (DISABLED.equals(value)) {
     88             mBlacklist.add(mBattery);
     89         } else {
     90             mBlacklist.remove(mBattery);
     91         }
     92         TunerService.get(getContext()).setValue(StatusBarIconController.ICON_BLACKLIST,
     93                 TextUtils.join(",", mBlacklist));
     94         return true;
     95     }
     96 }
     97