| /* |
| * 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 androidx.window.sidecar; |
| |
| import android.os.IBinder; |
| |
| import androidx.annotation.NonNull; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * Basic implementation of the {@link SidecarInterface}. An OEM can choose to use it as the base |
| * class for their implementation. |
| */ |
| abstract class StubSidecar implements SidecarInterface { |
| |
| private SidecarCallback mSidecarCallback; |
| private final Set<IBinder> mWindowLayoutChangeListenerTokens = new HashSet<>(); |
| private boolean mDeviceStateChangeListenerRegistered; |
| |
| StubSidecar() { |
| } |
| |
| @Override |
| public void setSidecarCallback(@NonNull SidecarCallback sidecarCallback) { |
| this.mSidecarCallback = sidecarCallback; |
| } |
| |
| @Override |
| public void onWindowLayoutChangeListenerAdded(@NonNull IBinder iBinder) { |
| this.mWindowLayoutChangeListenerTokens.add(iBinder); |
| this.onListenersChanged(); |
| } |
| |
| @Override |
| public void onWindowLayoutChangeListenerRemoved(@NonNull IBinder iBinder) { |
| this.mWindowLayoutChangeListenerTokens.remove(iBinder); |
| this.onListenersChanged(); |
| } |
| |
| @Override |
| public void onDeviceStateListenersChanged(boolean isEmpty) { |
| this.mDeviceStateChangeListenerRegistered = !isEmpty; |
| this.onListenersChanged(); |
| } |
| |
| void updateDeviceState(SidecarDeviceState newState) { |
| if (this.mSidecarCallback != null) { |
| mSidecarCallback.onDeviceStateChanged(newState); |
| } |
| } |
| |
| void updateWindowLayout(@NonNull IBinder windowToken, |
| @NonNull SidecarWindowLayoutInfo newLayout) { |
| if (this.mSidecarCallback != null) { |
| mSidecarCallback.onWindowLayoutChanged(windowToken, newLayout); |
| } |
| } |
| |
| @NonNull |
| Set<IBinder> getWindowsListeningForLayoutChanges() { |
| return mWindowLayoutChangeListenerTokens; |
| } |
| |
| protected boolean hasListeners() { |
| return !mWindowLayoutChangeListenerTokens.isEmpty() || mDeviceStateChangeListenerRegistered; |
| } |
| |
| protected abstract void onListenersChanged(); |
| } |