content: /*
   * Copyright (C) 2017 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.autofill.ui;
  
  import android.annotation.NonNull;
  import android.app.AppOpsManager;
  import android.content.Context;
  import android.os.Binder;
  import android.os.IBinder;
  import android.os.UserHandle;
  
  /**
   * This class controls showing/hiding overlays. We don't
   * hide all overlays (toast/system alerts) while sensitive
   * autofill UI is up.
   */
  class OverlayControl {
  
      private final IBinder mToken = new Binder();
  
      private final @NonNull AppOpsManager mAppOpsManager;
  
      OverlayControl(@NonNull Context context) {
          mAppOpsManager = context.getSystemService(AppOpsManager.class);
      }
  
      void hideOverlays() {
          setOverlayAllowed(false);
      }
  
      void showOverlays() {
          setOverlayAllowed(true);
      }
  
      private void setOverlayAllowed(boolean allowed) {
          if (mAppOpsManager != null) {
              mAppOpsManager.setUserRestrictionForUser(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, !allowed,
                      mToken, null, UserHandle.USER_ALL);
              mAppOpsManager.setUserRestrictionForUser(AppOpsManager.OP_TOAST_WINDOW, !allowed,
                      mToken, null, UserHandle.USER_ALL);
          }
      }
  }
  