| /** |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.power; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import android.annotation.NonNull; |
| import android.content.Context; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.util.ArraySet; |
| import android.util.Pair; |
| import android.util.Slog; |
| |
| import com.android.internal.statusbar.IStatusBarService; |
| |
| import java.io.PrintWriter; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| /** |
| * Communicates with System UI to suppress the ambient display. |
| */ |
| public class AmbientDisplaySuppressionController { |
| private static final String TAG = "AmbientDisplaySuppressionController"; |
| |
| private final Context mContext; |
| private final Set<Pair<String, Integer>> mSuppressionTokens; |
| private IStatusBarService mStatusBarService; |
| |
| AmbientDisplaySuppressionController(Context context) { |
| mContext = requireNonNull(context); |
| mSuppressionTokens = Collections.synchronizedSet(new ArraySet<>()); |
| } |
| |
| /** |
| * Suppresses ambient display. |
| * |
| * @param token A persistible identifier for the ambient display suppression. |
| * @param callingUid The uid of the calling application. |
| * @param suppress If true, suppresses the ambient display. Otherwise, unsuppresses it. |
| */ |
| public void suppress(@NonNull String token, int callingUid, boolean suppress) { |
| Pair<String, Integer> suppressionToken = Pair.create(requireNonNull(token), callingUid); |
| |
| if (suppress) { |
| mSuppressionTokens.add(suppressionToken); |
| } else { |
| mSuppressionTokens.remove(suppressionToken); |
| } |
| |
| try { |
| synchronized (mSuppressionTokens) { |
| getStatusBar().suppressAmbientDisplay(isSuppressed()); |
| } |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Failed to suppress ambient display", e); |
| } |
| } |
| |
| /** |
| * Returns whether ambient display is suppressed for the given token. |
| * |
| * @param token A persistible identifier for the ambient display suppression. |
| * @param callingUid The uid of the calling application. |
| */ |
| public boolean isSuppressed(@NonNull String token, int callingUid) { |
| return mSuppressionTokens.contains(Pair.create(requireNonNull(token), callingUid)); |
| } |
| |
| /** |
| * Returns whether ambient display is suppressed. |
| */ |
| public boolean isSuppressed() { |
| return !mSuppressionTokens.isEmpty(); |
| } |
| |
| /** |
| * Dumps the state of ambient display suppression and the list of suppression tokens into |
| * {@code pw}. |
| */ |
| public void dump(PrintWriter pw) { |
| pw.println("AmbientDisplaySuppressionController:"); |
| pw.println(" ambientDisplaySuppressed=" + isSuppressed()); |
| pw.println(" mSuppressionTokens=" + mSuppressionTokens); |
| } |
| |
| private synchronized IStatusBarService getStatusBar() { |
| if (mStatusBarService == null) { |
| mStatusBarService = IStatusBarService.Stub.asInterface( |
| ServiceManager.getService(Context.STATUS_BAR_SERVICE)); |
| } |
| return mStatusBarService; |
| } |
| } |