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/*
* Copyright (C) 2018 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.statusbar.notification.row;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.AsyncTask;
import android.util.Log;
import java.util.Set;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
/**
* A cache for inline images of image messages.
*/
public class NotificationInlineImageCache implements NotificationInlineImageResolver.ImageCache {
private static final String TAG = NotificationInlineImageCache.class.getSimpleName();
private NotificationInlineImageResolver mResolver;
private final ConcurrentHashMap<Uri, PreloadImageTask> mCache;
public NotificationInlineImageCache() {
mCache = new ConcurrentHashMap<>();
}
@Override
public void setImageResolver(NotificationInlineImageResolver resolver) {
mResolver = resolver;
}
@Override
public boolean hasEntry(Uri uri) {
return mCache.containsKey(uri);
}
@Override
public void preload(Uri uri) {
PreloadImageTask newTask = new PreloadImageTask(mResolver);
newTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, uri);
mCache.put(uri, newTask);
}
@Override
public Drawable get(Uri uri, long timeoutMs) {
Drawable result = null;
try {
result = mCache.get(uri).get(timeoutMs, TimeUnit.MILLISECONDS);
} catch (InterruptedException | ExecutionException
| TimeoutException | CancellationException ex) {
Log.d(TAG, "get: Failed get image from " + uri + " " + ex);
}
return result;
}
@Override
public void purge() {
Set<Uri> wantedSet = mResolver.getWantedUriSet();
mCache.entrySet().removeIf(entry -> !wantedSet.contains(entry.getKey()));
}
@Override
public void cancelRunningTasks() {
mCache.forEach((key, value) -> {
if (value.getStatus() != AsyncTask.Status.FINISHED) {
value.cancel(true);
}
});
}
private static class PreloadImageTask extends AsyncTask<Uri, Void, Drawable> {
private final NotificationInlineImageResolver mResolver;
PreloadImageTask(NotificationInlineImageResolver resolver) {
mResolver = resolver;
}
@Override
protected Drawable doInBackground(Uri... uris) {
Uri target = uris[0];
return mResolver.resolveImage(target);
}
}
}
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