Start of photos

Change-Id: Id53dd96d8873e0fe6c2685e07cd7bdc0cde7ea75

1 files changed, 89 insertions, 0 deletions

diff --git a/src/com/android/photos/data/MediaSetLoader.java b/src/com/android/photos/data/MediaSetLoader.java
new file mode 100644
index 000000000..4afb7d922
--- /dev/null
+++ b/src/com/android/photos/data/MediaSetLoader.java
@@ -0,0 +1,89 @@
+/*
+ * 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.data;
+
+import android.content.AsyncTaskLoader;
+import android.content.Context;
+
+import com.android.gallery3d.data.ContentListener;
+import com.android.gallery3d.data.DataManager;
+import com.android.gallery3d.data.MediaSet;
+import com.android.gallery3d.data.MediaSet.SyncListener;
+import com.android.gallery3d.util.Future;
+
+/**
+ * Proof of concept, don't use
+ */
+public class MediaSetLoader extends AsyncTaskLoader<MediaSet> {
+
+    private static final SyncListener sNullListener = new SyncListener() {
+        @Override
+        public void onSyncDone(MediaSet mediaSet, int resultCode) {
+        }
+    };
+
+    private MediaSet mMediaSet;
+    private Future<Integer> mSyncTask = null;
+    private ContentListener mObserver = new ContentListener() {
+        @Override
+        public void onContentDirty() {
+            onContentChanged();
+        }
+    };
+
+    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 MediaSet loadInBackground() {
+        mMediaSet.loadIfDirty();
+        return mMediaSet;
+    }
+
+}