1 files changed, 103 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/data/ComboAlbum.java b/src/com/android/gallery3d/data/ComboAlbum.java
new file mode 100644
index 000000000..cadd9f8af
--- /dev/null
+++ b/src/com/android/gallery3d/data/ComboAlbum.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2011 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.gallery3d.data;
+
+import com.android.gallery3d.util.Future;
+
+import java.util.ArrayList;
+
+// ComboAlbum combines multiple media sets into one. It lists all media items
+// from the input albums.
+// This only handles SubMediaSets, not MediaItems. (That's all we need now)
+public class ComboAlbum extends MediaSet implements ContentListener {
+    @SuppressWarnings("unused")
+    private static final String TAG = "ComboAlbum";
+    private final MediaSet[] mSets;
+    private String mName;
+
+    public ComboAlbum(Path path, MediaSet[] mediaSets, String name) {
+        super(path, nextVersionNumber());
+        mSets = mediaSets;
+        for (MediaSet set : mSets) {
+            set.addContentListener(this);
+        }
+        mName = name;
+    }
+
+    @Override
+    public ArrayList<MediaItem> getMediaItem(int start, int count) {
+        ArrayList<MediaItem> items = new ArrayList<MediaItem>();
+        for (MediaSet set : mSets) {
+            int size = set.getMediaItemCount();
+            if (count < 1) break;
+            if (start < size) {
+                int fetchCount = (start + count <= size) ? count : size - start;
+                ArrayList<MediaItem> fetchItems = set.getMediaItem(start, fetchCount);
+                items.addAll(fetchItems);
+                count -= fetchItems.size();
+                start = 0;
+            } else {
+                start -= size;
+            }
+        }
+        return items;
+    }
+
+    @Override
+    public int getMediaItemCount() {
+        int count = 0;
+        for (MediaSet set : mSets) {
+            count += set.getMediaItemCount();
+        }
+        return count;
+    }
+
+    @Override
+    public boolean isLeafAlbum() {
+        return true;
+    }
+
+    @Override
+    public String getName() {
+        return mName;
+    }
+
+    public void useNameOfChild(int i) {
+        if (i < mSets.length) mName = mSets[i].getName();
+    }
+
+    @Override
+    public long reload() {
+        boolean changed = false;
+        for (int i = 0, n = mSets.length; i < n; ++i) {
+            long version = mSets[i].reload();
+            if (version > mDataVersion) changed = true;
+        }
+        if (changed) mDataVersion = nextVersionNumber();
+        return mDataVersion;
+    }
+
+    @Override
+    public void onContentDirty() {
+        notifyContentChanged();
+    }
+
+    @Override
+    public Future<Integer> requestSync(SyncListener listener) {
+        return requestSyncOnMultipleSets(mSets, listener);
+    }
+}