diff options
Diffstat (limited to 'src/com/android/gallery3d/data/ComboAlbum.java')
-rw-r--r-- | src/com/android/gallery3d/data/ComboAlbum.java | 87 |
1 files changed, 87 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..8ca2077a4 --- /dev/null +++ b/src/com/android/gallery3d/data/ComboAlbum.java @@ -0,0 +1,87 @@ +/* + * 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.app.GalleryApp; + +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 { + private static final String TAG = "ComboAlbum"; + private final MediaSet[] mSets; + private final 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 String getName() { + return mName; + } + + @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; + } + + public void onContentDirty() { + notifyContentChanged(); + } +} |