1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.data; 18 19 import java.util.ArrayList; 20 21 public class ClusterAlbum extends MediaSet implements ContentListener { 22 private static final String TAG = "ClusterAlbum"; 23 private ArrayList<Path> mPaths = new ArrayList<Path>(); 24 private String mName = ""; 25 private DataManager mDataManager; 26 private MediaSet mClusterAlbumSet; 27 ClusterAlbum(Path path, DataManager dataManager, MediaSet clusterAlbumSet)28 public ClusterAlbum(Path path, DataManager dataManager, 29 MediaSet clusterAlbumSet) { 30 super(path, nextVersionNumber()); 31 mDataManager = dataManager; 32 mClusterAlbumSet = clusterAlbumSet; 33 mClusterAlbumSet.addContentListener(this); 34 } 35 setMediaItems(ArrayList<Path> paths)36 void setMediaItems(ArrayList<Path> paths) { 37 mPaths = paths; 38 } 39 getMediaItems()40 ArrayList<Path> getMediaItems() { 41 return mPaths; 42 } 43 setName(String name)44 public void setName(String name) { 45 mName = name; 46 } 47 48 @Override getName()49 public String getName() { 50 return mName; 51 } 52 53 @Override getMediaItemCount()54 public int getMediaItemCount() { 55 return mPaths.size(); 56 } 57 58 @Override getMediaItem(int start, int count)59 public ArrayList<MediaItem> getMediaItem(int start, int count) { 60 return getMediaItemFromPath(mPaths, start, count, mDataManager); 61 } 62 getMediaItemFromPath( ArrayList<Path> paths, int start, int count, DataManager dataManager)63 public static ArrayList<MediaItem> getMediaItemFromPath( 64 ArrayList<Path> paths, int start, int count, 65 DataManager dataManager) { 66 if (start >= paths.size()) { 67 return new ArrayList<MediaItem>(); 68 } 69 int end = Math.min(start + count, paths.size()); 70 ArrayList<Path> subset = new ArrayList<Path>(paths.subList(start, end)); 71 final MediaItem[] buf = new MediaItem[end - start]; 72 ItemConsumer consumer = new ItemConsumer() { 73 public void consume(int index, MediaItem item) { 74 buf[index] = item; 75 } 76 }; 77 dataManager.mapMediaItems(subset, consumer, 0); 78 ArrayList<MediaItem> result = new ArrayList<MediaItem>(end - start); 79 for (int i = 0; i < buf.length; i++) { 80 result.add(buf[i]); 81 } 82 return result; 83 } 84 85 @Override enumerateMediaItems(ItemConsumer consumer, int startIndex)86 protected int enumerateMediaItems(ItemConsumer consumer, int startIndex) { 87 mDataManager.mapMediaItems(mPaths, consumer, startIndex); 88 return mPaths.size(); 89 } 90 91 @Override getTotalMediaItemCount()92 public int getTotalMediaItemCount() { 93 return mPaths.size(); 94 } 95 96 @Override reload()97 public long reload() { 98 if (mClusterAlbumSet.reload() > mDataVersion) { 99 mDataVersion = nextVersionNumber(); 100 } 101 return mDataVersion; 102 } 103 onContentDirty()104 public void onContentDirty() { 105 notifyContentChanged(); 106 } 107 108 @Override getSupportedOperations()109 public int getSupportedOperations() { 110 return SUPPORT_SHARE | SUPPORT_DELETE | SUPPORT_INFO; 111 } 112 113 @Override delete()114 public void delete() { 115 ItemConsumer consumer = new ItemConsumer() { 116 public void consume(int index, MediaItem item) { 117 if ((item.getSupportedOperations() & SUPPORT_DELETE) != 0) { 118 item.delete(); 119 } 120 } 121 }; 122 mDataManager.mapMediaItems(mPaths, consumer, 0); 123 } 124 125 @Override isLeafAlbum()126 public boolean isLeafAlbum() { 127 return true; 128 } 129 } 130