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/*
* Copyright (C) 2013 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.photos.shims;
import android.content.AsyncTaskLoader;
import android.content.Context;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import com.android.gallery3d.data.ContentListener;
import com.android.gallery3d.data.DataManager;
import com.android.gallery3d.data.MediaItem;
import com.android.gallery3d.data.MediaSet;
import com.android.gallery3d.data.MediaSet.SyncListener;
import com.android.gallery3d.util.Future;
import com.android.photos.data.AlbumSetLoader;
import java.util.ArrayList;
/**
* Returns all MediaSets in a MediaSet, wrapping them in a cursor to appear
* like a AlbumSetLoader.
*/
public class MediaSetLoader extends AsyncTaskLoader<Cursor> implements LoaderCompatShim<Cursor>{
private static final SyncListener sNullListener = new SyncListener() {
@Override
public void onSyncDone(MediaSet mediaSet, int resultCode) {
}
};
private final MediaSet mMediaSet;
private Future<Integer> mSyncTask = null;
private ContentListener mObserver = new ContentListener() {
@Override
public void onContentDirty() {
onContentChanged();
}
};
private ArrayList<MediaItem> mCoverItems;
public MediaSetLoader(Context context) {
super(context);
DataManager dm = DataManager.from(context);
String path = dm.getTopSetPath(DataManager.INCLUDE_ALL);
mMediaSet = dm.getMediaSet(path);
}
public MediaSetLoader(Context context, String path) {
super(context);
mMediaSet = DataManager.from(getContext()).getMediaSet(path);
}
@Override
protected void onStartLoading() {
super.onStartLoading();
mMediaSet.addContentListener(mObserver);
mSyncTask = mMediaSet.requestSync(sNullListener);
forceLoad();
}
@Override
protected boolean onCancelLoad() {
if (mSyncTask != null) {
mSyncTask.cancel();
mSyncTask = null;
}
return super.onCancelLoad();
}
@Override
protected void onStopLoading() {
super.onStopLoading();
cancelLoad();
mMediaSet.removeContentListener(mObserver);
}
@Override
protected void onReset() {
super.onReset();
onStopLoading();
}
@Override
public Cursor loadInBackground() {
mMediaSet.loadIfDirty();
final MatrixCursor cursor = new MatrixCursor(AlbumSetLoader.PROJECTION);
final Object[] row = new Object[AlbumSetLoader.PROJECTION.length];
int count = mMediaSet.getSubMediaSetCount();
ArrayList<MediaItem> coverItems = new ArrayList<MediaItem>(count);
for (int i = 0; i < count; i++) {
MediaSet m = mMediaSet.getSubMediaSet(i);
m.loadIfDirty();
row[AlbumSetLoader.INDEX_ID] = i;
row[AlbumSetLoader.INDEX_TITLE] = m.getName();
row[AlbumSetLoader.INDEX_COUNT] = m.getMediaItemCount();
MediaItem coverItem = m.getCoverMediaItem();
if (coverItem != null) {
row[AlbumSetLoader.INDEX_TIMESTAMP] = coverItem.getDateInMs();
}
coverItems.add(coverItem);
cursor.addRow(row);
}
synchronized (mMediaSet) {
mCoverItems = coverItems;
}
return cursor;
}
@Override
public Drawable drawableForItem(Cursor item, Drawable recycle) {
BitmapJobDrawable drawable = null;
if (recycle == null || !(recycle instanceof BitmapJobDrawable)) {
drawable = new BitmapJobDrawable();
} else {
drawable = (BitmapJobDrawable) recycle;
}
int index = item.getInt(AlbumSetLoader.INDEX_ID);
drawable.setMediaItem(mCoverItems.get(index));
return drawable;
}
public static int getThumbnailSize() {
return MediaItem.getTargetSize(MediaItem.TYPE_MICROTHUMBNAIL);
}
@Override
public Uri uriForItem(Cursor item) {
int index = item.getInt(AlbumSetLoader.INDEX_ID);
MediaSet ms = mMediaSet.getSubMediaSet(index);
return ms == null ? null : ms.getContentUri();
}
}
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