| /* |
| * Copyright (C) 2023 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.systemui.dreams.touch.scrim; |
| |
| import static com.android.systemui.dreams.touch.scrim.dagger.ScrimModule.BOUNCERLESS_SCRIM_CONTROLLER; |
| import static com.android.systemui.dreams.touch.scrim.dagger.ScrimModule.BOUNCER_SCRIM_CONTROLLER; |
| |
| import com.android.systemui.dagger.qualifiers.Main; |
| import com.android.systemui.statusbar.policy.KeyguardStateController; |
| |
| import java.util.HashSet; |
| import java.util.concurrent.Executor; |
| |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| |
| /** |
| * {@link ScrimManager} helps manage multiple {@link ScrimController} instances, specifying the |
| * appropriate one to use at the current moment and managing the handoff between controllers. |
| */ |
| public class ScrimManager { |
| private final ScrimController mBouncerScrimController; |
| private final ScrimController mBouncerlessScrimController; |
| private final KeyguardStateController mKeyguardStateController; |
| private final Executor mExecutor; |
| |
| private ScrimController mCurrentController; |
| private final HashSet<Callback> mCallbacks; |
| |
| /** |
| * Interface implemented for receiving updates to the active {@link ScrimController}. |
| */ |
| public interface Callback { |
| /** |
| * Invoked when the controller changes. |
| * @param controller The currently active {@link ScrimController}. |
| */ |
| void onScrimControllerChanged(ScrimController controller); |
| } |
| |
| private final KeyguardStateController.Callback mKeyguardStateCallback = |
| new KeyguardStateController.Callback() { |
| @Override |
| public void onKeyguardShowingChanged() { |
| mExecutor.execute(() -> updateController()); |
| } |
| }; |
| |
| @Inject |
| ScrimManager(@Main Executor executor, |
| @Named(BOUNCER_SCRIM_CONTROLLER) ScrimController bouncerScrimController, |
| @Named(BOUNCERLESS_SCRIM_CONTROLLER)ScrimController bouncerlessScrimController, |
| KeyguardStateController keyguardStateController) { |
| mExecutor = executor; |
| mCallbacks = new HashSet<>(); |
| mBouncerlessScrimController = bouncerlessScrimController; |
| mBouncerScrimController = bouncerScrimController; |
| mKeyguardStateController = keyguardStateController; |
| |
| mKeyguardStateController.addCallback(mKeyguardStateCallback); |
| updateController(); |
| } |
| |
| private void updateController() { |
| final ScrimController existingController = mCurrentController; |
| mCurrentController = mKeyguardStateController.canDismissLockScreen() |
| ? mBouncerlessScrimController |
| : mBouncerScrimController; |
| |
| if (existingController == mCurrentController) { |
| return; |
| } |
| |
| mCallbacks.forEach(callback -> callback.onScrimControllerChanged(mCurrentController)); |
| } |
| |
| /** |
| * Adds a {@link Callback} to receive future changes to the active {@link ScrimController}. |
| */ |
| public void addCallback(Callback callback) { |
| mExecutor.execute(() -> mCallbacks.add(callback)); |
| } |
| |
| /** |
| * Removes the {@link Callback} from receiving further updates. |
| */ |
| public void removeCallback(Callback callback) { |
| mExecutor.execute(() -> mCallbacks.remove(callback)); |
| } |
| |
| /** |
| * Returns the currently get {@link ScrimController}. |
| * @return |
| */ |
| public ScrimController getCurrentController() { |
| return mCurrentController; |
| } |
| } |