2 files changed, 159 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;
+    }
+
+}
diff --git a/src/com/android/photos/data/PhotoSetLoader.java b/src/com/android/photos/data/PhotoSetLoader.java
new file mode 100644
index 000000000..8c511a525
--- /dev/null
+++ b/src/com/android/photos/data/PhotoSetLoader.java
@@ -0,0 +1,70 @@
+/*
+ * 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.Context;
+import android.content.CursorLoader;
+import android.database.ContentObserver;
+import android.net.Uri;
+import android.provider.MediaStore;
+import android.provider.MediaStore.Files;
+import android.provider.MediaStore.Files.FileColumns;
+
+public class PhotoSetLoader extends CursorLoader {
+
+    private static final Uri CONTENT_URI = Files.getContentUri("external");
+    private static final String[] PROJECTION = new String[] {
+        FileColumns._ID,
+        FileColumns.DATA,
+        FileColumns.WIDTH,
+        FileColumns.HEIGHT,
+        FileColumns.DATE_ADDED,
+        FileColumns.MEDIA_TYPE,
+    };
+    private static final String SORT_ORDER = FileColumns.DATE_ADDED + " DESC";
+    private static final String SELECTION =
+            FileColumns.MEDIA_TYPE + " == " + FileColumns.MEDIA_TYPE_IMAGE
+            + " OR "
+            + FileColumns.MEDIA_TYPE + " == " + FileColumns.MEDIA_TYPE_VIDEO;
+
+    public static final int INDEX_ID = 0;
+    public static final int INDEX_DATA = 1;
+    public static final int INDEX_WIDTH = 2;
+    public static final int INDEX_HEIGHT = 3;
+    public static final int INDEX_DATE_ADDED = 4;
+    public static final int INDEX_MEDIA_TYPE = 5;
+
+    private static final Uri GLOBAL_CONTENT_URI = Uri.parse("content://" + MediaStore.AUTHORITY + "/external/");
+    private final ContentObserver mGlobalObserver = new ForceLoadContentObserver();
+
+    public PhotoSetLoader(Context context) {
+        super(context, CONTENT_URI, PROJECTION, SELECTION, null, SORT_ORDER);
+    }
+
+    @Override
+    protected void onStartLoading() {
+        super.onStartLoading();
+        getContext().getContentResolver().registerContentObserver(GLOBAL_CONTENT_URI,
+                true, mGlobalObserver);
+    }
+
+    @Override
+    protected void onReset() {
+        super.onReset();
+        getContext().getContentResolver().unregisterContentObserver(mGlobalObserver);
+    }
+}