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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.nano.MetricsProto.MetricsEvent;
     25 import com.android.systemui.Dependency;
     26 import com.android.systemui.statusbar.phone.StatusBarIconController;
     27 
     28 import static android.provider.Settings.System.SHOW_BATTERY_PERCENT;
     29 
     30 public class BatteryPreference extends DropDownPreference implements TunerService.Tunable {
     31 
     32     private static final String PERCENT = "percent";
     33     private static final String DEFAULT = "default";
     34     private static final String DISABLED = "disabled";
     35 
     36     private final String mBattery;
     37     private boolean mBatteryEnabled;
     38     private boolean mHasPercentage;
     39     private ArraySet<String> mBlacklist;
     40     private boolean mHasSetValue;
     41 
     42     public BatteryPreference(Context context, AttributeSet attrs) {
     43         super(context, attrs);
     44         mBattery = context.getString(com.android.internal.R.string.status_bar_battery);
     45         setEntryValues(new CharSequence[] {PERCENT, DEFAULT, DISABLED });
     46     }
     47 
     48     @Override
     49     public void onAttached() {
     50         super.onAttached();
     51         mHasPercentage = Settings.System.getInt(getContext().getContentResolver(),
     52                 SHOW_BATTERY_PERCENT, 0) != 0;
     53         Dependency.get(TunerService.class).addTunable(this, StatusBarIconController.ICON_BLACKLIST);
     54     }
     55 
     56     @Override
     57     public void onDetached() {
     58         Dependency.get(TunerService.class).removeTunable(this);
     59         super.onDetached();
     60     }
     61 
     62     @Override
     63     public void onTuningChanged(String key, String newValue) {
     64         if (StatusBarIconController.ICON_BLACKLIST.equals(key)) {
     65             mBlacklist = StatusBarIconController.getIconBlacklist(newValue);
     66             mBatteryEnabled = !mBlacklist.contains(mBattery);
     67         }
     68         if (!mHasSetValue) {
     69             // Because of the complicated tri-state it can end up looping and setting state back to
     70             // what the user didn't choose.  To avoid this, just set the state once and rely on the
     71             // preference to handle updates.
     72             mHasSetValue = true;
     73             if (mBatteryEnabled && mHasPercentage) {
     74                 setValue(PERCENT);
     75             } else if (mBatteryEnabled) {
     76                 setValue(DEFAULT);
     77             } else {
     78                 setValue(DISABLED);
     79             }
     80         }
     81     }
     82 
     83     @Override
     84     protected boolean persistString(String value) {
     85         final boolean v = PERCENT.equals(value);
     86         MetricsLogger.action(getContext(), MetricsEvent.TUNER_BATTERY_PERCENTAGE, v);
     87         Settings.System.putInt(getContext().getContentResolver(), SHOW_BATTERY_PERCENT, v ? 1 : 0);
     88         if (DISABLED.equals(value)) {
     89             mBlacklist.add(mBattery);
     90         } else {
     91             mBlacklist.remove(mBattery);
     92         }
     93         Dependency.get(TunerService.class).setValue(StatusBarIconController.ICON_BLACKLIST,
     94                 TextUtils.join(",", mBlacklist));
     95         return true;
     96     }
     97 }
     98