| /* |
| * Copyright (C) 2021 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.extensions.layout; |
| |
| import static android.view.Display.DEFAULT_DISPLAY; |
| |
| import static androidx.window.common.CommonFoldingFeature.COMMON_STATE_FLAT; |
| import static androidx.window.common.CommonFoldingFeature.COMMON_STATE_HALF_OPENED; |
| import static androidx.window.util.ExtensionHelper.rotateRectToDisplayRotation; |
| import static androidx.window.util.ExtensionHelper.transformToWindowSpaceRect; |
| |
| import android.annotation.Nullable; |
| import android.app.Activity; |
| import android.app.Application; |
| import android.content.Context; |
| import android.graphics.Rect; |
| import android.os.Bundle; |
| import android.os.IBinder; |
| import android.util.Log; |
| |
| import androidx.annotation.NonNull; |
| import androidx.window.common.CommonFoldingFeature; |
| import androidx.window.common.DeviceStateManagerFoldingFeatureProducer; |
| import androidx.window.common.EmptyLifecycleCallbacksAdapter; |
| import androidx.window.common.SettingsDisplayFeatureProducer; |
| import androidx.window.util.DataProducer; |
| import androidx.window.util.PriorityDataProducer; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.function.Consumer; |
| |
| /** |
| * Reference implementation of androidx.window.extensions.layout OEM interface for use with |
| * WindowManager Jetpack. |
| * |
| * NOTE: This version is a work in progress and under active development. It MUST NOT be used in |
| * production builds since the interface can still change before reaching stable version. |
| * Please refer to {@link androidx.window.sidecar.SampleSidecarImpl} instead. |
| */ |
| public class WindowLayoutComponentImpl implements WindowLayoutComponent { |
| private static final String TAG = "SampleExtension"; |
| |
| private final Map<Activity, Consumer<WindowLayoutInfo>> mWindowLayoutChangeListeners = |
| new HashMap<>(); |
| |
| private final SettingsDisplayFeatureProducer mSettingsDisplayFeatureProducer; |
| private final DataProducer<List<CommonFoldingFeature>> mFoldingFeatureProducer; |
| |
| public WindowLayoutComponentImpl(Context context) { |
| ((Application) context.getApplicationContext()) |
| .registerActivityLifecycleCallbacks(new NotifyOnConfigurationChanged()); |
| mSettingsDisplayFeatureProducer = new SettingsDisplayFeatureProducer(context); |
| mFoldingFeatureProducer = new PriorityDataProducer<>(List.of( |
| mSettingsDisplayFeatureProducer, |
| new DeviceStateManagerFoldingFeatureProducer(context) |
| )); |
| mFoldingFeatureProducer.addDataChangedCallback(this::onDisplayFeaturesChanged); |
| } |
| |
| /** |
| * Adds a listener interested in receiving updates to {@link WindowLayoutInfo} |
| * |
| * @param activity hosting a {@link android.view.Window} |
| * @param consumer interested in receiving updates to {@link WindowLayoutInfo} |
| */ |
| public void addWindowLayoutInfoListener(@NonNull Activity activity, |
| @NonNull Consumer<WindowLayoutInfo> consumer) { |
| mWindowLayoutChangeListeners.put(activity, consumer); |
| updateRegistrations(); |
| } |
| |
| /** |
| * Removes a listener no longer interested in receiving updates. |
| * |
| * @param consumer no longer interested in receiving updates to {@link WindowLayoutInfo} |
| */ |
| public void removeWindowLayoutInfoListener( |
| @NonNull Consumer<WindowLayoutInfo> consumer) { |
| mWindowLayoutChangeListeners.values().remove(consumer); |
| updateRegistrations(); |
| } |
| |
| void updateWindowLayout(@NonNull Activity activity, |
| @NonNull WindowLayoutInfo newLayout) { |
| Consumer<WindowLayoutInfo> consumer = mWindowLayoutChangeListeners.get(activity); |
| if (consumer != null) { |
| consumer.accept(newLayout); |
| } |
| } |
| |
| @NonNull |
| Set<Activity> getActivitiesListeningForLayoutChanges() { |
| return mWindowLayoutChangeListeners.keySet(); |
| } |
| |
| @NonNull |
| private Boolean isListeningForLayoutChanges(IBinder token) { |
| for (Activity activity: getActivitiesListeningForLayoutChanges()) { |
| if (token.equals(activity.getWindow().getAttributes().token)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| protected boolean hasListeners() { |
| return !mWindowLayoutChangeListeners.isEmpty(); |
| } |
| |
| /** |
| * A convenience method to translate from the common feature state to the extensions feature |
| * state. More specifically, translates from {@link CommonFoldingFeature.State} to |
| * {@link FoldingFeature.STATE_FLAT} or {@link FoldingFeature.STATE_HALF_OPENED}. If it is not |
| * possible to translate, then we will return a {@code null} value. |
| * |
| * @param state if it matches a value in {@link CommonFoldingFeature.State}, {@code null} |
| * otherwise. @return a {@link FoldingFeature.STATE_FLAT} or |
| * {@link FoldingFeature.STATE_HALF_OPENED} if the given state matches a value in |
| * {@link CommonFoldingFeature.State} and {@code null} otherwise. |
| */ |
| @Nullable |
| private Integer convertToExtensionState(int state) { |
| if (state == COMMON_STATE_FLAT) { |
| return FoldingFeature.STATE_FLAT; |
| } else if (state == COMMON_STATE_HALF_OPENED) { |
| return FoldingFeature.STATE_HALF_OPENED; |
| } else { |
| return null; |
| } |
| } |
| |
| private void onDisplayFeaturesChanged() { |
| for (Activity activity : getActivitiesListeningForLayoutChanges()) { |
| WindowLayoutInfo newLayout = getWindowLayoutInfo(activity); |
| updateWindowLayout(activity, newLayout); |
| } |
| } |
| |
| @NonNull |
| private WindowLayoutInfo getWindowLayoutInfo(@NonNull Activity activity) { |
| List<DisplayFeature> displayFeatures = getDisplayFeatures(activity); |
| return new WindowLayoutInfo(displayFeatures); |
| } |
| |
| /** |
| * Translate from the {@link CommonFoldingFeature} to |
| * {@link DisplayFeature} for a given {@link Activity}. If a |
| * {@link CommonFoldingFeature} is not valid then it will be omitted. |
| * |
| * For a {@link FoldingFeature} the bounds are localized into the {@link Activity} window |
| * coordinate space and the state is calculated from {@link CommonFoldingFeature#getState()}. |
| * The state from {@link #mFoldingFeatureProducer} may not be valid since |
| * {@link #mFoldingFeatureProducer} is a general state controller. If the state is not valid, |
| * the {@link FoldingFeature} is omitted from the {@link List} of {@link DisplayFeature}. If |
| * the bounds are not valid, constructing a {@link FoldingFeature} will throw an |
| * {@link IllegalArgumentException} since this can cause negative UI effects down stream. |
| * |
| * @param activity a proxy for the {@link android.view.Window} that contains the |
| * {@link DisplayFeature}. |
| * @return a {@link List} of valid {@link DisplayFeature} that |
| * are within the {@link android.view.Window} of the {@link Activity} |
| */ |
| private List<DisplayFeature> getDisplayFeatures(@NonNull Activity activity) { |
| List<DisplayFeature> features = new ArrayList<>(); |
| int displayId = activity.getDisplay().getDisplayId(); |
| if (displayId != DEFAULT_DISPLAY) { |
| Log.w(TAG, "This sample doesn't support display features on secondary displays"); |
| return features; |
| } |
| |
| if (activity.isInMultiWindowMode()) { |
| // It is recommended not to report any display features in multi-window mode, since it |
| // won't be possible to synchronize the display feature positions with window movement. |
| return features; |
| } |
| |
| Optional<List<CommonFoldingFeature>> storedFeatures = mFoldingFeatureProducer.getData(); |
| if (storedFeatures.isPresent()) { |
| for (CommonFoldingFeature baseFeature : storedFeatures.get()) { |
| Integer state = convertToExtensionState(baseFeature.getState()); |
| if (state == null) { |
| continue; |
| } |
| Rect featureRect = baseFeature.getRect(); |
| rotateRectToDisplayRotation(displayId, featureRect); |
| transformToWindowSpaceRect(activity, featureRect); |
| |
| features.add(new FoldingFeature(featureRect, baseFeature.getType(), state)); |
| } |
| } |
| return features; |
| } |
| |
| private void updateRegistrations() { |
| if (hasListeners()) { |
| mSettingsDisplayFeatureProducer.registerObserversIfNeeded(); |
| } else { |
| mSettingsDisplayFeatureProducer.unregisterObserversIfNeeded(); |
| } |
| onDisplayFeaturesChanged(); |
| } |
| |
| private final class NotifyOnConfigurationChanged extends EmptyLifecycleCallbacksAdapter { |
| @Override |
| public void onActivityCreated(Activity activity, Bundle savedInstanceState) { |
| super.onActivityCreated(activity, savedInstanceState); |
| onDisplayFeaturesChangedIfListening(activity); |
| } |
| |
| @Override |
| public void onActivityConfigurationChanged(Activity activity) { |
| super.onActivityConfigurationChanged(activity); |
| onDisplayFeaturesChangedIfListening(activity); |
| } |
| |
| private void onDisplayFeaturesChangedIfListening(Activity activity) { |
| IBinder token = activity.getWindow().getAttributes().token; |
| if (token == null || isListeningForLayoutChanges(token)) { |
| onDisplayFeaturesChanged(); |
| } |
| } |
| } |
| } |