1 /* 2 * Copyright (C) 2023 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.server.display.brightness.clamper; 18 19 import android.annotation.NonNull; 20 import android.content.ContentResolver; 21 import android.content.Context; 22 import android.database.ContentObserver; 23 import android.hardware.display.BrightnessInfo; 24 import android.hardware.display.DisplayManagerInternal; 25 import android.os.Handler; 26 import android.os.UserHandle; 27 import android.provider.Settings; 28 29 import com.android.internal.annotations.VisibleForTesting; 30 import com.android.server.display.DisplayBrightnessState; 31 import com.android.server.display.brightness.BrightnessReason; 32 33 import java.io.PrintWriter; 34 35 public class BrightnessWearBedtimeModeModifier implements BrightnessStateModifier, 36 BrightnessClamperController.DisplayDeviceDataListener, 37 BrightnessClamperController.StatefulModifier { 38 39 public static final int BEDTIME_MODE_OFF = 0; 40 public static final int BEDTIME_MODE_ON = 1; 41 42 private final Context mContext; 43 44 private final ContentObserver mSettingsObserver; 45 protected final Handler mHandler; 46 protected final BrightnessClamperController.ClamperChangeListener mChangeListener; 47 48 private float mBrightnessCap; 49 private boolean mIsActive = false; 50 private boolean mApplied = false; 51 BrightnessWearBedtimeModeModifier(Handler handler, Context context, BrightnessClamperController.ClamperChangeListener listener, WearBedtimeModeData data)52 BrightnessWearBedtimeModeModifier(Handler handler, Context context, 53 BrightnessClamperController.ClamperChangeListener listener, WearBedtimeModeData data) { 54 this(new Injector(), handler, context, listener, data); 55 } 56 57 @VisibleForTesting BrightnessWearBedtimeModeModifier(Injector injector, Handler handler, Context context, BrightnessClamperController.ClamperChangeListener listener, WearBedtimeModeData data)58 BrightnessWearBedtimeModeModifier(Injector injector, Handler handler, Context context, 59 BrightnessClamperController.ClamperChangeListener listener, WearBedtimeModeData data) { 60 mHandler = handler; 61 mChangeListener = listener; 62 mContext = context; 63 mBrightnessCap = data.getBrightnessWearBedtimeModeCap(); 64 mSettingsObserver = new ContentObserver(mHandler) { 65 @Override 66 public void onChange(boolean selfChange) { 67 final int bedtimeModeSetting = Settings.Global.getInt( 68 mContext.getContentResolver(), 69 Settings.Global.Wearable.BEDTIME_MODE, 70 BEDTIME_MODE_OFF); 71 mIsActive = bedtimeModeSetting == BEDTIME_MODE_ON; 72 mChangeListener.onChanged(); 73 } 74 }; 75 injector.registerBedtimeModeObserver(context.getContentResolver(), mSettingsObserver); 76 } 77 78 //region BrightnessStateModifier 79 @Override apply(DisplayManagerInternal.DisplayPowerRequest request, DisplayBrightnessState.Builder stateBuilder)80 public void apply(DisplayManagerInternal.DisplayPowerRequest request, 81 DisplayBrightnessState.Builder stateBuilder) { 82 if (mIsActive && stateBuilder.getMaxBrightness() > mBrightnessCap) { 83 stateBuilder.setMaxBrightness(mBrightnessCap); 84 stateBuilder.setBrightness(Math.min(stateBuilder.getBrightness(), mBrightnessCap)); 85 stateBuilder.setBrightnessMaxReason( 86 BrightnessInfo.BRIGHTNESS_MAX_REASON_WEAR_BEDTIME_MODE); 87 stateBuilder.getBrightnessReason().addModifier(BrightnessReason.MODIFIER_THROTTLED); 88 // set fast change only when modifier is activated. 89 // this will allow auto brightness to apply slow change even when modifier is active 90 if (!mApplied) { 91 stateBuilder.setIsSlowChange(false); 92 } 93 mApplied = true; 94 } else { 95 mApplied = false; 96 } 97 } 98 99 @Override stop()100 public void stop() { 101 mContext.getContentResolver().unregisterContentObserver(mSettingsObserver); 102 } 103 104 @Override dump(PrintWriter writer)105 public void dump(PrintWriter writer) { 106 writer.println("BrightnessWearBedtimeModeModifier:"); 107 writer.println(" mBrightnessCap: " + mBrightnessCap); 108 writer.println(" mIsActive: " + mIsActive); 109 writer.println(" mApplied: " + mApplied); 110 } 111 112 @Override shouldListenToLightSensor()113 public boolean shouldListenToLightSensor() { 114 return false; 115 } 116 117 @Override setAmbientLux(float lux)118 public void setAmbientLux(float lux) { 119 // noop 120 } 121 //endregion 122 123 //region DisplayDeviceDataListener 124 @Override onDisplayChanged(BrightnessClamperController.DisplayDeviceData data)125 public void onDisplayChanged(BrightnessClamperController.DisplayDeviceData data) { 126 mHandler.post(() -> { 127 mBrightnessCap = data.getBrightnessWearBedtimeModeCap(); 128 mChangeListener.onChanged(); 129 }); 130 } 131 //endregion 132 133 //region StatefulModifier 134 @Override applyStateChange( BrightnessClamperController.ModifiersAggregatedState aggregatedState)135 public void applyStateChange( 136 BrightnessClamperController.ModifiersAggregatedState aggregatedState) { 137 if (mIsActive && aggregatedState.mMaxBrightness > mBrightnessCap) { 138 aggregatedState.mMaxBrightness = mBrightnessCap; 139 aggregatedState.mMaxBrightnessReason = 140 BrightnessInfo.BRIGHTNESS_MAX_REASON_WEAR_BEDTIME_MODE; 141 } 142 } 143 //endregion 144 145 interface WearBedtimeModeData { getBrightnessWearBedtimeModeCap()146 float getBrightnessWearBedtimeModeCap(); 147 } 148 149 @VisibleForTesting 150 static class Injector { registerBedtimeModeObserver(@onNull ContentResolver cr, @NonNull ContentObserver observer)151 void registerBedtimeModeObserver(@NonNull ContentResolver cr, 152 @NonNull ContentObserver observer) { 153 cr.registerContentObserver( 154 Settings.Global.getUriFor(Settings.Global.Wearable.BEDTIME_MODE), 155 /* notifyForDescendants= */ false, observer, UserHandle.USER_ALL); 156 } 157 } 158 } 159