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.wm;
  
  import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_ATM;
  import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_WITH_CLASS_NAME;
  
  import android.app.IAssistDataReceiver;
  import android.graphics.Bitmap;
  import android.os.Binder;
  import android.os.Bundle;
  import android.os.RemoteException;
  import android.util.Log;
  
  import com.android.server.am.AssistDataRequester.AssistDataRequesterCallbacks;
  
  /**
   * Proxies assist data to the given receiver, skipping all callbacks if the receiver dies.
   */
  class AssistDataReceiverProxy implements AssistDataRequesterCallbacks,
          Binder.DeathRecipient {
  
      private static final String TAG = TAG_WITH_CLASS_NAME ? "AssistDataReceiverProxy" : TAG_ATM;
  
      private String mCallerPackage;
      private IAssistDataReceiver mReceiver;
  
      public AssistDataReceiverProxy(IAssistDataReceiver receiver, String callerPackage) {
          mReceiver = receiver;
          mCallerPackage = callerPackage;
          linkToDeath();
      }
  
      @Override
      public boolean canHandleReceivedAssistDataLocked() {
          // We are forwarding, so we can always receive this data
          return true;
      }
  
      @Override
      public void onAssistDataReceivedLocked(Bundle data, int activityIndex, int activityCount) {
          if (mReceiver != null) {
              try {
                  mReceiver.onHandleAssistData(data);
              } catch (RemoteException e) {
                  Log.w(TAG, "Failed to proxy assist data to receiver in package="
                          + mCallerPackage, e);
              }
          }
      }
  
      @Override
      public void onAssistScreenshotReceivedLocked(Bitmap screenshot) {
          if (mReceiver != null) {
              try {
                  mReceiver.onHandleAssistScreenshot(screenshot);
              } catch (RemoteException e) {
                  Log.w(TAG, "Failed to proxy assist screenshot to receiver in package="
                          + mCallerPackage, e);
              }
          }
      }
  
      @Override
      public void onAssistRequestCompleted() {
          unlinkToDeath();
      }
  
      @Override
      public void binderDied() {
          unlinkToDeath();
      }
  
      private void linkToDeath() {
          try {
              mReceiver.asBinder().linkToDeath(this, 0);
          } catch (RemoteException e) {
              Log.w(TAG, "Could not link to client death", e);
          }
      }
  
      private void unlinkToDeath() {
          if (mReceiver != null) {
              mReceiver.asBinder().unlinkToDeath(this, 0);
          }
          mReceiver = null;
      }
  }