1f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin/* 2f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Copyright (C) 2011 The Android Open Source Project 3f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 4f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Licensed under the Apache License, Version 2.0 (the "License"); 5f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * you may not use this file except in compliance with the License. 6f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * You may obtain a copy of the License at 7f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 8f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * http://www.apache.org/licenses/LICENSE-2.0 9f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 10f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Unless required by applicable law or agreed to in writing, software 11f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * distributed under the License is distributed on an "AS IS" BASIS, 12f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * See the License for the specific language governing permissions and 14f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * limitations under the License. 15f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin */ 16f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 17f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linpackage com.android.gallery3d.data; 18f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 1957cbaa1ef40d2215c6400f5ae4af3a09e67abb2dHung-ying Tyanimport com.android.gallery3d.util.Future; 20f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 21f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.ArrayList; 22f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 23f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin// ComboAlbum combines multiple media sets into one. It lists all media items 24f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin// from the input albums. 25f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin// This only handles SubMediaSets, not MediaItems. (That's all we need now) 26f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linpublic class ComboAlbum extends MediaSet implements ContentListener { 27f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final String TAG = "ComboAlbum"; 28f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final MediaSet[] mSets; 29f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final String mName; 30f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 31f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public ComboAlbum(Path path, MediaSet[] mediaSets, String name) { 32f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin super(path, nextVersionNumber()); 33f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSets = mediaSets; 34f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (MediaSet set : mSets) { 35f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin set.addContentListener(this); 36f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 37f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mName = name; 38f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 39f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 40f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 41f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public ArrayList<MediaItem> getMediaItem(int start, int count) { 42f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ArrayList<MediaItem> items = new ArrayList<MediaItem>(); 43f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (MediaSet set : mSets) { 44f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int size = set.getMediaItemCount(); 45f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (count < 1) break; 46f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (start < size) { 47f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int fetchCount = (start + count <= size) ? count : size - start; 48f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ArrayList<MediaItem> fetchItems = set.getMediaItem(start, fetchCount); 49f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin items.addAll(fetchItems); 50f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin count -= fetchItems.size(); 51f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin start = 0; 52f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 53f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin start -= size; 54f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 55f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 56f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return items; 57f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 58f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 59f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 60f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getMediaItemCount() { 61f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int count = 0; 62f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (MediaSet set : mSets) { 63f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin count += set.getMediaItemCount(); 64f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 65f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return count; 66f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 67f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 68f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 69ad790f2e24837eca6cc6e2b3622f32b3a750c74bRay Chen public boolean isLeafAlbum() { 70ad790f2e24837eca6cc6e2b3622f32b3a750c74bRay Chen return true; 71ad790f2e24837eca6cc6e2b3622f32b3a750c74bRay Chen } 72ad790f2e24837eca6cc6e2b3622f32b3a750c74bRay Chen 73ad790f2e24837eca6cc6e2b3622f32b3a750c74bRay Chen @Override 74f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public String getName() { 75f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mName; 76f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 77f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 78f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 79f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public long reload() { 80f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin boolean changed = false; 81f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (int i = 0, n = mSets.length; i < n; ++i) { 82f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin long version = mSets[i].reload(); 83f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (version > mDataVersion) changed = true; 84f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 85f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (changed) mDataVersion = nextVersionNumber(); 86f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mDataVersion; 87f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 88f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 89f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onContentDirty() { 90f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin notifyContentChanged(); 91f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 9257cbaa1ef40d2215c6400f5ae4af3a09e67abb2dHung-ying Tyan 9357cbaa1ef40d2215c6400f5ae4af3a09e67abb2dHung-ying Tyan @Override 9457cbaa1ef40d2215c6400f5ae4af3a09e67abb2dHung-ying Tyan public Future<Integer> requestSync(SyncListener listener) { 95fe49be45412f8d0f68343662318e73822da486c8Owen Lin return requestSyncOnMultipleSets(mSets, listener); 9657cbaa1ef40d2215c6400f5ae4af3a09e67abb2dHung-ying Tyan } 97f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin} 98