diff options
Diffstat (limited to 'src/com/android/photos/shims/MediaItemsLoader.java')
-rw-r--r-- | src/com/android/photos/shims/MediaItemsLoader.java | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/com/android/photos/shims/MediaItemsLoader.java b/src/com/android/photos/shims/MediaItemsLoader.java new file mode 100644 index 000000000..6142355a9 --- /dev/null +++ b/src/com/android/photos/shims/MediaItemsLoader.java @@ -0,0 +1,190 @@ +/* + * 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() { + // TODO: This probably doesn't work + mMediaSet.reload(); + 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; + } + +} |