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/*
* 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 com.android.server.wallpaper;
import android.app.ILocalWallpaperColorConsumer;
import android.graphics.RectF;
import android.os.IBinder;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.SparseArray;
import com.android.internal.annotations.VisibleForTesting;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
/**
* Manages the lifecycle of local wallpaper color callbacks and their interested wallpaper regions.
*/
public class LocalColorRepository {
/**
* Maps local wallpaper color callbacks' binders to their interested wallpaper regions, which
* are stored in a map of display Ids to wallpaper regions.
* binder callback -> [display id: int] -> areas
*/
ArrayMap<IBinder, SparseArray<ArraySet<RectF>>> mLocalColorAreas = new ArrayMap();
RemoteCallbackList<ILocalWallpaperColorConsumer> mCallbacks = new RemoteCallbackList();
/**
* Add areas to a consumer
* @param consumer
* @param areas
* @param displayId
*/
public void addAreas(ILocalWallpaperColorConsumer consumer, List<RectF> areas, int displayId) {
IBinder binder = consumer.asBinder();
SparseArray<ArraySet<RectF>> displays = mLocalColorAreas.get(binder);
ArraySet<RectF> displayAreas = null;
if (displays == null) {
try {
consumer.asBinder().linkToDeath(() ->
mLocalColorAreas.remove(consumer.asBinder()), 0);
} catch (RemoteException e) {
e.printStackTrace();
}
displays = new SparseArray<>();
mLocalColorAreas.put(binder, displays);
} else {
displayAreas = displays.get(displayId);
}
if (displayAreas == null) {
displayAreas = new ArraySet(areas);
displays.put(displayId, displayAreas);
}
for (int i = 0; i < areas.size(); i++) {
displayAreas.add(areas.get(i));
}
mCallbacks.register(consumer);
}
/**
* remove an area for a consumer
* @param consumer
* @param areas
* @param displayId
* @return the areas that are removed from all callbacks
*/
public List<RectF> removeAreas(ILocalWallpaperColorConsumer consumer, List<RectF> areas,
int displayId) {
IBinder binder = consumer.asBinder();
SparseArray<ArraySet<RectF>> displays = mLocalColorAreas.get(binder);
ArraySet<RectF> registeredAreas = null;
if (displays != null) {
registeredAreas = displays.get(displayId);
if (registeredAreas == null) {
mCallbacks.unregister(consumer);
} else {
for (int i = 0; i < areas.size(); i++) {
registeredAreas.remove(areas.get(i));
}
if (registeredAreas.size() == 0) {
displays.remove(displayId);
}
}
if (displays.size() == 0) {
mLocalColorAreas.remove(binder);
mCallbacks.unregister(consumer);
}
} else {
mCallbacks.unregister(consumer);
}
ArraySet<RectF> purged = new ArraySet<>(areas);
for (int i = 0; i < mLocalColorAreas.size(); i++) {
for (int j = 0; j < mLocalColorAreas.valueAt(i).size(); j++) {
for (int k = 0; k < mLocalColorAreas.valueAt(i).valueAt(j).size(); k++) {
purged.remove(mLocalColorAreas.valueAt(i).valueAt(j).valueAt(k));
}
}
}
return new ArrayList(purged);
}
/**
* Return the local areas by display id
* @param displayId
* @return
*/
public List<RectF> getAreasByDisplayId(int displayId) {
ArrayList<RectF> areas = new ArrayList();
for (int i = 0; i < mLocalColorAreas.size(); i++) {
SparseArray<ArraySet<RectF>> displays = mLocalColorAreas.valueAt(i);
if (displays == null) continue;
ArraySet<RectF> displayAreas = displays.get(displayId);
if (displayAreas == null) continue;
for (int j = 0; j < displayAreas.size(); j++) {
areas.add(displayAreas.valueAt(j));
}
}
return areas;
}
/**
* invoke a callback for each area of interest
* @param callback
* @param area
* @param displayId
*/
public void forEachCallback(Consumer<ILocalWallpaperColorConsumer> callback,
RectF area, int displayId) {
mCallbacks.broadcast(cb -> {
IBinder binder = cb.asBinder();
SparseArray<ArraySet<RectF>> displays = mLocalColorAreas.get(binder);
if (displays == null) return;
ArraySet<RectF> displayAreas = displays.get(displayId);
if (displayAreas != null && displayAreas.contains(area)) callback.accept(cb);
});
}
/**
* For testing
* @param callback
* @return if the callback is registered
*/
@VisibleForTesting
protected boolean isCallbackAvailable(ILocalWallpaperColorConsumer callback) {
return mLocalColorAreas.get(callback.asBinder()) != null;
}
}
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