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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 android.provider.MediaStore.Files.FileColumns;
import android.util.SparseArray;
import com.android.gallery3d.data.ContentListener;
import com.android.gallery3d.data.DataManager;
import com.android.gallery3d.data.MediaItem;
import com.android.gallery3d.data.MediaObject;
import com.android.gallery3d.data.MediaSet;
import com.android.gallery3d.data.MediaSet.ItemConsumer;
import com.android.gallery3d.data.MediaSet.SyncListener;
import com.android.gallery3d.data.Path;
import com.android.gallery3d.util.Future;
import com.android.photos.data.PhotoSetLoader;
import java.util.ArrayList;
/**
* Returns all MediaItems in a MediaSet, wrapping them in a cursor to appear
* like a PhotoSetLoader
*/
public class MediaItemsLoader 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 final DataManager mDataManager;
private Future<Integer> mSyncTask = null;
private ContentListener mObserver = new ContentListener() {
@Override
public void onContentDirty() {
onContentChanged();
}
};
private SparseArray<MediaItem> mMediaItems;
public MediaItemsLoader(Context context) {
super(context);
mDataManager = DataManager.from(context);
String path = mDataManager.getTopSetPath(DataManager.INCLUDE_ALL);
mMediaSet = mDataManager.getMediaSet(path);
}
public MediaItemsLoader(Context context, String parentPath) {
super(context);
mDataManager = DataManager.from(getContext());
mMediaSet = mDataManager.getMediaSet(parentPath);
}
@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(PhotoSetLoader.PROJECTION);
final Object[] row = new Object[PhotoSetLoader.PROJECTION.length];
final SparseArray<MediaItem> mediaItems = new SparseArray<MediaItem>();
mMediaSet.enumerateTotalMediaItems(new ItemConsumer() {
@Override
public void consume(int index, MediaItem item) {
row[PhotoSetLoader.INDEX_ID] = index;
row[PhotoSetLoader.INDEX_DATA] = item.getContentUri().toString();
row[PhotoSetLoader.INDEX_DATE_ADDED] = item.getDateInMs();
row[PhotoSetLoader.INDEX_HEIGHT] = item.getHeight();
row[PhotoSetLoader.INDEX_WIDTH] = item.getWidth();
row[PhotoSetLoader.INDEX_WIDTH] = item.getWidth();
int rawMediaType = item.getMediaType();
int mappedMediaType = FileColumns.MEDIA_TYPE_NONE;
if (rawMediaType == MediaItem.MEDIA_TYPE_IMAGE) {
mappedMediaType = FileColumns.MEDIA_TYPE_IMAGE;
} else if (rawMediaType == MediaItem.MEDIA_TYPE_VIDEO) {
mappedMediaType = FileColumns.MEDIA_TYPE_VIDEO;
}
row[PhotoSetLoader.INDEX_MEDIA_TYPE] = mappedMediaType;
row[PhotoSetLoader.INDEX_SUPPORTED_OPERATIONS] =
item.getSupportedOperations();
cursor.addRow(row);
mediaItems.append(index, item);
}
});
synchronized (mMediaSet) {
mMediaItems = mediaItems;
}
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(PhotoSetLoader.INDEX_ID);
drawable.setMediaItem(mMediaItems.get(index));
return drawable;
}
public static int getThumbnailSize() {
return MediaItem.getTargetSize(MediaItem.TYPE_MICROTHUMBNAIL);
}
@Override
public Uri uriForItem(Cursor item) {
int index = item.getInt(PhotoSetLoader.INDEX_ID);
MediaItem mi = mMediaItems.get(index);
return mi == null ? null : mi.getContentUri();
}
@Override
public ArrayList<Uri> urisForSubItems(Cursor item) {
return null;
}
@Override
public void deleteItemWithPath(Object path) {
MediaObject o = mDataManager.getMediaObject((Path) path);
if (o != null) {
o.delete();
}
}
@Override
public Object getPathForItem(Cursor item) {
int index = item.getInt(PhotoSetLoader.INDEX_ID);
MediaItem mi = mMediaItems.get(index);
if (mi != null) {
return mi.getPath();
}
return null;
}
}
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