1 files changed, 191 insertions, 0 deletions
diff --git a/src/com/android/photos/shims/MediaSetLoader.java b/src/com/android/photos/shims/MediaSetLoader.java
new file mode 100644
index 000000000..9093bc139
--- /dev/null
+++ b/src/com/android/photos/shims/MediaSetLoader.java
@@ -0,0 +1,191 @@
+/*
+ * 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.MediaObject;
+import com.android.gallery3d.data.MediaSet;
+import com.android.gallery3d.data.Path;
+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 final DataManager mDataManager;
+    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);
+        mDataManager = DataManager.from(context);
+        String path = mDataManager.getTopSetPath(DataManager.INCLUDE_ALL);
+        mMediaSet = mDataManager.getMediaSet(path);
+    }
+
+    public MediaSetLoader(Context context, String path) {
+        super(context);
+        mDataManager = DataManager.from(getContext());
+        mMediaSet = mDataManager.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() {
+        // TODO: This probably doesn't work
+        mMediaSet.reload();
+        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.reload();
+            row[AlbumSetLoader.INDEX_ID] = i;
+            row[AlbumSetLoader.INDEX_TITLE] = m.getName();
+            row[AlbumSetLoader.INDEX_COUNT] = m.getMediaItemCount();
+            row[AlbumSetLoader.INDEX_SUPPORTED_OPERATIONS] = m.getSupportedOperations();
+            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();
+    }
+
+    @Override
+    public ArrayList<Uri> urisForSubItems(Cursor item) {
+        int index = item.getInt(AlbumSetLoader.INDEX_ID);
+        MediaSet ms = mMediaSet.getSubMediaSet(index);
+        if (ms == null) return null;
+        final ArrayList<Uri> result = new ArrayList<Uri>();
+        ms.enumerateMediaItems(new MediaSet.ItemConsumer() {
+            @Override
+            public void consume(int index, MediaItem item) {
+                if (item != null) {
+                    result.add(item.getContentUri());
+                }
+            }
+        });
+        return result;
+    }
+
+    @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(AlbumSetLoader.INDEX_ID);
+        MediaSet ms = mMediaSet.getSubMediaSet(index);
+        if (ms != null) {
+            return ms.getPath();
+        }
+        return null;
+    }
+}