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/*
* 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 com.android.wallpaper.util;
import static android.view.View.MeasureSpec.EXACTLY;
import static android.view.View.MeasureSpec.makeMeasureSpec;
import android.content.Context;
import android.service.wallpaper.WallpaperService;
import android.view.Surface;
import android.view.SurfaceControlViewHost;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.ImageView;
import androidx.annotation.Nullable;
import com.android.wallpaper.module.Injector;
import com.android.wallpaper.module.InjectorProvider;
import com.android.wallpaper.module.PackageStatusNotifier;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
/**
* Default implementation of {@link SurfaceHolder.Callback} to render a static wallpaper when the
* surface has been created.
*/
public class WallpaperSurfaceCallback implements SurfaceHolder.Callback {
/**
* Listener used to be notified when this surface is created
*/
public interface SurfaceListener {
/**
* Called when {@link WallpaperSurfaceCallback#surfaceCreated(SurfaceHolder)} is called.
*/
void onSurfaceCreated();
}
private Surface mLastSurface;
private SurfaceControlViewHost mHost;
// Home workspace surface is behind the app window, and so must the home image wallpaper like
// the live wallpaper. This view is rendered on here for home image wallpaper.
private ImageView mHomeImageWallpaper;
private final Context mContext;
private final View mContainerView;
private final SurfaceView mWallpaperSurface;
@Nullable
private final SurfaceListener mListener;
@Nullable
private final Future<Integer> mPlaceholderColor;
private boolean mSurfaceCreated;
private PackageStatusNotifier.Listener mAppStatusListener;
private PackageStatusNotifier mPackageStatusNotifier;
public WallpaperSurfaceCallback(Context context, View containerView,
SurfaceView wallpaperSurface, @Nullable Future<Integer> placeholderColor,
@Nullable SurfaceListener listener) {
mContext = context.getApplicationContext();
mContainerView = containerView;
mWallpaperSurface = wallpaperSurface;
mListener = listener;
// Notify WallpaperSurface to reset image wallpaper when encountered live wallpaper's
// package been changed in background.
Injector injector = InjectorProvider.getInjector();
mPackageStatusNotifier = injector.getPackageStatusNotifier(context);
mAppStatusListener = (packageName, status) -> {
if (status != PackageStatusNotifier.PackageStatus.REMOVED) {
resetHomeImageWallpaper();
}
};
mPackageStatusNotifier.addListener(mAppStatusListener,
WallpaperService.SERVICE_INTERFACE);
mPlaceholderColor = placeholderColor;
}
public WallpaperSurfaceCallback(Context context, View containerView,
SurfaceView wallpaperSurface, @Nullable SurfaceListener listener) {
this(context, containerView, wallpaperSurface, null, listener);
}
public WallpaperSurfaceCallback(Context context, View containerView,
SurfaceView wallpaperSurface) {
this(context, containerView, wallpaperSurface, null);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (mLastSurface != holder.getSurface()) {
mLastSurface = holder.getSurface();
setupSurfaceWallpaper(/* forceClean= */ true);
}
if (mListener != null) {
mListener.onSurfaceCreated();
}
mSurfaceCreated = true;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { }
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mSurfaceCreated = false;
}
/**
* Call to release resources and app status listener.
*/
public void cleanUp() {
releaseHost();
if (mHomeImageWallpaper != null) {
mHomeImageWallpaper.setImageDrawable(null);
}
mPackageStatusNotifier.removeListener(mAppStatusListener);
}
private void releaseHost() {
if (mHost != null) {
mHost.release();
mHost = null;
}
}
/**
* Reset existing image wallpaper by creating a new ImageView for SurfaceControlViewHost
* if surface state is not created.
*/
private void resetHomeImageWallpaper() {
if (mSurfaceCreated) {
return;
}
if (mHost != null) {
setupSurfaceWallpaper(/* forceClean= */ false);
}
}
private void setupSurfaceWallpaper(boolean forceClean) {
mHomeImageWallpaper = new ImageView(mContext);
Integer placeholder = null;
if (mPlaceholderColor != null && mPlaceholderColor.isDone()) {
try {
placeholder = mPlaceholderColor.get();
} catch (InterruptedException | ExecutionException e) {
// Ignore
}
}
mHomeImageWallpaper.setBackgroundColor((placeholder != null) ? placeholder
: ResourceUtils.getColorAttr(mContext, android.R.attr.colorSecondary));
mHomeImageWallpaper.measure(makeMeasureSpec(mContainerView.getWidth(), EXACTLY),
makeMeasureSpec(mContainerView.getHeight(), EXACTLY));
mHomeImageWallpaper.layout(0, 0, mContainerView.getWidth(),
mContainerView.getHeight());
if (forceClean) {
releaseHost();
mHost = new SurfaceControlViewHost(mContext,
mContainerView.getDisplay(), mWallpaperSurface.getHostToken());
}
mHost.setView(mHomeImageWallpaper, mHomeImageWallpaper.getWidth(),
mHomeImageWallpaper.getHeight());
mWallpaperSurface.setChildSurfacePackage(mHost.getSurfacePackage());
}
@Nullable
public ImageView getHomeImageWallpaper() {
return mHomeImageWallpaper;
}
}
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