1 /* 2 * Copyright (C) 2021 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.wm; 18 19 import static android.os.PowerManager.THERMAL_STATUS_CRITICAL; 20 import static android.view.CrossWindowBlurListeners.CROSS_WINDOW_BLUR_SUPPORTED; 21 22 import android.content.BroadcastReceiver; 23 import android.content.Context; 24 import android.content.Intent; 25 import android.content.IntentFilter; 26 import android.database.ContentObserver; 27 import android.net.ConnectivityManager; 28 import android.os.PowerManager; 29 import android.os.RemoteCallbackList; 30 import android.os.RemoteException; 31 import android.provider.Settings; 32 import android.view.ICrossWindowBlurEnabledListener; 33 import android.view.TunnelModeEnabledListener; 34 35 /** 36 * Keeps track of the different factors that determine whether cross-window blur is enabled 37 * or disabled. Also keeps a list of all interested listeners and notifies them when the 38 * blur enabled state changes. 39 */ 40 final class BlurController { 41 private final Context mContext; 42 private final RemoteCallbackList<ICrossWindowBlurEnabledListener> 43 mBlurEnabledListeners = new RemoteCallbackList<>(); 44 // We don't use the WM global lock, because the BlurController is not involved in window 45 // drawing and only receives binder calls that don't need synchronization with the rest of WM 46 private final Object mLock = new Object(); 47 private volatile boolean mBlurEnabled; 48 private boolean mInPowerSaveMode; 49 private boolean mCriticalThermalStatus; 50 private boolean mBlurDisabledSetting; 51 private boolean mTunnelModeEnabled = false; 52 53 private TunnelModeEnabledListener mTunnelModeListener = 54 new TunnelModeEnabledListener(Runnable::run) { 55 @Override 56 public void onTunnelModeEnabledChanged(boolean tunnelModeEnabled) { 57 mTunnelModeEnabled = tunnelModeEnabled; 58 updateBlurEnabled(); 59 } 60 }; 61 BlurController(Context context, PowerManager powerManager)62 BlurController(Context context, PowerManager powerManager) { 63 mContext = context; 64 65 IntentFilter filter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION); 66 filter.addAction(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED); 67 context.registerReceiverForAllUsers(new BroadcastReceiver() { 68 @Override 69 public void onReceive(Context context, Intent intent) { 70 if (PowerManager.ACTION_POWER_SAVE_MODE_CHANGED.equals(intent.getAction())) { 71 // onReceive always gets called on the same thread, so there is no 72 // multi-threaded execution here. Thus, we don't have to hold mLock here. 73 mInPowerSaveMode = powerManager.isPowerSaveMode(); 74 updateBlurEnabled(); 75 } 76 } 77 }, filter, null, null); 78 mInPowerSaveMode = powerManager.isPowerSaveMode(); 79 80 context.getContentResolver().registerContentObserver( 81 Settings.Global.getUriFor(Settings.Global.DISABLE_WINDOW_BLURS), false, 82 new ContentObserver(null) { 83 @Override 84 public void onChange(boolean selfChange) { 85 super.onChange(selfChange); 86 // onChange always gets called on the same thread, so there is no 87 // multi-threaded execution here. Thus, we don't have to hold mLock here. 88 mBlurDisabledSetting = getBlurDisabledSetting(); 89 updateBlurEnabled(); 90 } 91 }); 92 mBlurDisabledSetting = getBlurDisabledSetting(); 93 94 powerManager.addThermalStatusListener((status) -> { 95 mCriticalThermalStatus = status >= THERMAL_STATUS_CRITICAL; 96 updateBlurEnabled(); 97 }); 98 mCriticalThermalStatus = powerManager.getCurrentThermalStatus() >= THERMAL_STATUS_CRITICAL; 99 100 TunnelModeEnabledListener.register(mTunnelModeListener); 101 102 updateBlurEnabled(); 103 } 104 registerCrossWindowBlurEnabledListener(ICrossWindowBlurEnabledListener listener)105 boolean registerCrossWindowBlurEnabledListener(ICrossWindowBlurEnabledListener listener) { 106 if (listener == null) return false; 107 mBlurEnabledListeners.register(listener); 108 return getBlurEnabled(); 109 } 110 unregisterCrossWindowBlurEnabledListener(ICrossWindowBlurEnabledListener listener)111 void unregisterCrossWindowBlurEnabledListener(ICrossWindowBlurEnabledListener listener) { 112 if (listener == null) return; 113 mBlurEnabledListeners.unregister(listener); 114 } 115 getBlurEnabled()116 boolean getBlurEnabled() { 117 return mBlurEnabled; 118 } 119 updateBlurEnabled()120 private void updateBlurEnabled() { 121 synchronized (mLock) { 122 final boolean newEnabled = CROSS_WINDOW_BLUR_SUPPORTED && !mBlurDisabledSetting 123 && !mInPowerSaveMode && !mTunnelModeEnabled && !mCriticalThermalStatus; 124 if (mBlurEnabled == newEnabled) { 125 return; 126 } 127 mBlurEnabled = newEnabled; 128 notifyBlurEnabledChangedLocked(newEnabled); 129 } 130 } 131 notifyBlurEnabledChangedLocked(boolean enabled)132 private void notifyBlurEnabledChangedLocked(boolean enabled) { 133 int i = mBlurEnabledListeners.beginBroadcast(); 134 while (i > 0) { 135 i--; 136 ICrossWindowBlurEnabledListener listener = 137 mBlurEnabledListeners.getBroadcastItem(i); 138 try { 139 listener.onCrossWindowBlurEnabledChanged(enabled); 140 } catch (RemoteException e) { 141 } 142 } 143 mBlurEnabledListeners.finishBroadcast(); 144 } 145 getBlurDisabledSetting()146 private boolean getBlurDisabledSetting() { 147 return Settings.Global.getInt(mContext.getContentResolver(), 148 Settings.Global.DISABLE_WINDOW_BLURS, 0) == 1; 149 } 150 } 151