AlbumSetDataLoader.java revision dbf4ba12afba115888493caa34937643257e2bb1
1f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin/* 2f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Copyright (C) 2010 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.app; 18f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 19dbf4ba12afba115888493caa34937643257e2bb1Ray Chenimport android.os.Handler; 20dbf4ba12afba115888493caa34937643257e2bb1Ray Chenimport android.os.Message; 21dbf4ba12afba115888493caa34937643257e2bb1Ray Chen 22f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.common.Utils; 23f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.data.ContentListener; 24f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.data.DataManager; 25f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.data.MediaItem; 26f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.data.MediaObject; 27f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.data.MediaSet; 28f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.ui.AlbumSetView; 29f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.ui.SynchronizedHandler; 30f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 31f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.ArrayList; 32f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.Arrays; 33f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.concurrent.Callable; 34f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.concurrent.ExecutionException; 35f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.concurrent.FutureTask; 36f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 37f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linpublic class AlbumSetDataAdapter implements AlbumSetView.Model { 38f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @SuppressWarnings("unused") 39f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final String TAG = "AlbumSetDataAdapter"; 40f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 41f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final int INDEX_NONE = -1; 42f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 43f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final int MIN_LOAD_COUNT = 4; 449201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang private static final int MAX_COVER_COUNT = 1; 45f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 46f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final int MSG_LOAD_START = 1; 47f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final int MSG_LOAD_FINISH = 2; 48f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final int MSG_RUN_OBJECT = 3; 49f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 50f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final MediaItem[] EMPTY_MEDIA_ITEMS = new MediaItem[0]; 51f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 52f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final MediaSet[] mData; 53f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final MediaItem[][] mCoverData; 54f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final long[] mItemVersion; 55f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final long[] mSetVersion; 56f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 57f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mActiveStart = 0; 58f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mActiveEnd = 0; 59f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 60f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mContentStart = 0; 61f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mContentEnd = 0; 62f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 63f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final MediaSet mSource; 64f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private long mSourceVersion = MediaObject.INVALID_DATA_VERSION; 65f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mSize; 66f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 67f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private AlbumSetView.ModelListener mModelListener; 68f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private LoadingListener mLoadingListener; 69f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private ReloadTask mReloadTask; 70f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 71f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final Handler mMainHandler; 72f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 73dbf4ba12afba115888493caa34937643257e2bb1Ray Chen private final MySourceListener mSourceListener = new MySourceListener(); 74f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 75f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public AlbumSetDataAdapter(GalleryActivity activity, MediaSet albumSet, int cacheSize) { 76f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSource = Utils.checkNotNull(albumSet); 77f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mCoverData = new MediaItem[cacheSize][]; 78f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mData = new MediaSet[cacheSize]; 79f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mItemVersion = new long[cacheSize]; 80f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSetVersion = new long[cacheSize]; 81f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Arrays.fill(mItemVersion, MediaObject.INVALID_DATA_VERSION); 82f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Arrays.fill(mSetVersion, MediaObject.INVALID_DATA_VERSION); 83f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 84f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mMainHandler = new SynchronizedHandler(activity.getGLRoot()) { 85f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 86f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void handleMessage(Message message) { 87f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin switch (message.what) { 88f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin case MSG_RUN_OBJECT: 89f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ((Runnable) message.obj).run(); 90f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return; 91f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin case MSG_LOAD_START: 92f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mLoadingListener != null) mLoadingListener.onLoadingStarted(); 93f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return; 94f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin case MSG_LOAD_FINISH: 95f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mLoadingListener != null) mLoadingListener.onLoadingFinished(); 96f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return; 97f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 98f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 99f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin }; 100f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 101f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 102f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void pause() { 103f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mReloadTask.terminate(); 104f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mReloadTask = null; 105f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSource.removeContentListener(mSourceListener); 106f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 107f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 108f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void resume() { 109f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSource.addContentListener(mSourceListener); 110f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mReloadTask = new ReloadTask(); 111f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mReloadTask.start(); 112f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 113f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 114f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public MediaSet getMediaSet(int index) { 115f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (index < mActiveStart && index >= mActiveEnd) { 116f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin throw new IllegalArgumentException(String.format( 117f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin "%s not in (%s, %s)", index, mActiveStart, mActiveEnd)); 118f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 119f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mData[index % mData.length]; 120f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 121f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 122f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public MediaItem[] getCoverItems(int index) { 123f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (index < mActiveStart && index >= mActiveEnd) { 124f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin throw new IllegalArgumentException(String.format( 125f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin "%s not in (%s, %s)", index, mActiveStart, mActiveEnd)); 126f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 127f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin MediaItem[] result = mCoverData[index % mCoverData.length]; 128f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 129f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // If the result is not ready yet, return an empty array 130f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return result == null ? EMPTY_MEDIA_ITEMS : result; 131f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 132f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 133f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getActiveStart() { 134f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mActiveStart; 135f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 136f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 137f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getActiveEnd() { 138f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mActiveEnd; 139f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 140f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 141f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public boolean isActive(int index) { 142f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return index >= mActiveStart && index < mActiveEnd; 143f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 144f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 145f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int size() { 146f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mSize; 147f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 148f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 149f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private void clearSlot(int slotIndex) { 150f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mData[slotIndex] = null; 151f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mCoverData[slotIndex] = null; 152f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mItemVersion[slotIndex] = MediaObject.INVALID_DATA_VERSION; 153f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSetVersion[slotIndex] = MediaObject.INVALID_DATA_VERSION; 154f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 155f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 156f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private void setContentWindow(int contentStart, int contentEnd) { 157f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (contentStart == mContentStart && contentEnd == mContentEnd) return; 158f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin MediaItem[][] data = mCoverData; 159f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int length = data.length; 160f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 161f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int start = this.mContentStart; 162f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int end = this.mContentEnd; 163f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 164f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mContentStart = contentStart; 165f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mContentEnd = contentEnd; 166f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 167f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (contentStart >= end || start >= contentEnd) { 168f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (int i = start, n = end; i < n; ++i) { 169f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin clearSlot(i % length); 170f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 171f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 172f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (int i = start; i < contentStart; ++i) { 173f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin clearSlot(i % length); 174f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 175f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (int i = contentEnd, n = end; i < n; ++i) { 176f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin clearSlot(i % length); 177f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 178f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 179f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mReloadTask.notifyDirty(); 180f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 181f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 182f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setActiveWindow(int start, int end) { 183f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (start == mActiveStart && end == mActiveEnd) return; 184f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 185f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Utils.assertTrue(start <= end 186f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin && end - start <= mCoverData.length && end <= mSize); 187f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 188f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mActiveStart = start; 189f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mActiveEnd = end; 190f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 191f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int length = mCoverData.length; 192f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // If no data is visible, keep the cache content 193f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (start == end) return; 194f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 195f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int contentStart = Utils.clamp((start + end) / 2 - length / 2, 196f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 0, Math.max(0, mSize - length)); 197f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int contentEnd = Math.min(contentStart + length, mSize); 198f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mContentStart > start || mContentEnd < end 199f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin || Math.abs(contentStart - mContentStart) > MIN_LOAD_COUNT) { 200f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin setContentWindow(contentStart, contentEnd); 201f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 202f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 203f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 204f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private class MySourceListener implements ContentListener { 205f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onContentDirty() { 206f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mReloadTask.notifyDirty(); 207f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 208f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 209f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 210f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setModelListener(AlbumSetView.ModelListener listener) { 211f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mModelListener = listener; 212f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 213f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 214f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setLoadingListener(LoadingListener listener) { 215f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mLoadingListener = listener; 216f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 217f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 218f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static void getRepresentativeItems(MediaSet set, int wanted, 219f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ArrayList<MediaItem> result) { 220f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (set.getMediaItemCount() > 0) { 221f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin result.addAll(set.getMediaItem(0, wanted)); 222f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 223f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 224f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int n = set.getSubMediaSetCount(); 225f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (int i = 0; i < n && wanted > result.size(); i++) { 226f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin MediaSet subset = set.getSubMediaSet(i); 227f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin double perSet = (double) (wanted - result.size()) / (n - i); 228f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int m = (int) Math.ceil(perSet); 229f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin getRepresentativeItems(subset, m, result); 230f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 231f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 232f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 233f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static class UpdateInfo { 234f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public long version; 235f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int index; 236f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 237f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int size; 238f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public MediaSet item; 239f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public MediaItem covers[]; 240f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 241f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 242f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private class GetUpdateInfo implements Callable<UpdateInfo> { 243f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 244f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final long mVersion; 245f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 246f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public GetUpdateInfo(long version) { 247f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mVersion = version; 248f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 249f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 250f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int getInvalidIndex(long version) { 251f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin long setVersion[] = mSetVersion; 252f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int length = setVersion.length; 253f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (int i = mContentStart, n = mContentEnd; i < n; ++i) { 254f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int index = i % length; 255f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (setVersion[i % length] != version) return i; 256f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 257f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return INDEX_NONE; 258f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 259f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 260f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 261f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public UpdateInfo call() throws Exception { 262f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int index = getInvalidIndex(mVersion); 263dbf4ba12afba115888493caa34937643257e2bb1Ray Chen if (index == INDEX_NONE && mSourceVersion == mVersion) return null; 264f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin UpdateInfo info = new UpdateInfo(); 265f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin info.version = mSourceVersion; 266f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin info.index = index; 267f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin info.size = mSize; 268f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return info; 269f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 270f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 271f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 272f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private class UpdateContent implements Callable<Void> { 273dbf4ba12afba115888493caa34937643257e2bb1Ray Chen private final UpdateInfo mUpdateInfo; 274f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 275f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public UpdateContent(UpdateInfo info) { 276f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mUpdateInfo = info; 277f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 278f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 279f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public Void call() { 280dbf4ba12afba115888493caa34937643257e2bb1Ray Chen // Avoid notifying listeners of status change after pause 281dbf4ba12afba115888493caa34937643257e2bb1Ray Chen // Otherwise gallery will be in inconsistent state after resume. 282dbf4ba12afba115888493caa34937643257e2bb1Ray Chen if (mReloadTask == null) return null; 283f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin UpdateInfo info = mUpdateInfo; 284f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSourceVersion = info.version; 285f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mSize != info.size) { 286f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSize = info.size; 287f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mModelListener != null) mModelListener.onSizeChanged(mSize); 288f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mContentEnd > mSize) mContentEnd = mSize; 289f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mActiveEnd > mSize) mActiveEnd = mSize; 290f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 291f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // Note: info.index could be INDEX_NONE, i.e., -1 292f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (info.index >= mContentStart && info.index < mContentEnd) { 293f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int pos = info.index % mCoverData.length; 294f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSetVersion[pos] = info.version; 295f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin long itemVersion = info.item.getDataVersion(); 296f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mItemVersion[pos] == itemVersion) return null; 297f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mItemVersion[pos] = itemVersion; 298f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mData[pos] = info.item; 299f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mCoverData[pos] = info.covers; 300f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mModelListener != null 301f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin && info.index >= mActiveStart && info.index < mActiveEnd) { 302f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mModelListener.onWindowContentChanged(info.index); 303f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 304f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 305f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return null; 306f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 307f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 308f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 309f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private <T> T executeAndWait(Callable<T> callable) { 310f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin FutureTask<T> task = new FutureTask<T>(callable); 311f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mMainHandler.sendMessage( 312f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mMainHandler.obtainMessage(MSG_RUN_OBJECT, task)); 313f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin try { 314f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return task.get(); 315f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } catch (InterruptedException e) { 316f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return null; 317f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } catch (ExecutionException e) { 318f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin throw new RuntimeException(e); 319f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 320f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 321f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 322f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // TODO: load active range first 323f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private class ReloadTask extends Thread { 324f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private volatile boolean mActive = true; 325f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private volatile boolean mDirty = true; 326f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private volatile boolean mIsLoading = false; 327f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 328f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private void updateLoading(boolean loading) { 329f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mIsLoading == loading) return; 330f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mIsLoading = loading; 331f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mMainHandler.sendEmptyMessage(loading ? MSG_LOAD_START : MSG_LOAD_FINISH); 332f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 333f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 334f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 335f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void run() { 336f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin boolean updateComplete = false; 337f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin while (mActive) { 338f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin synchronized (this) { 339f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mActive && !mDirty && updateComplete) { 340f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateLoading(false); 341f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Utils.waitWithoutInterrupt(this); 342f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin continue; 343f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 344f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 345f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mDirty = false; 346f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateLoading(true); 347f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 348f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin long version; 349f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin synchronized (DataManager.LOCK) { 350f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin version = mSource.reload(); 351f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 352f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin UpdateInfo info = executeAndWait(new GetUpdateInfo(version)); 353f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateComplete = info == null; 354f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (updateComplete) continue; 355f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 356f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin synchronized (DataManager.LOCK) { 357f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (info.version != version) { 358f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin info.version = version; 359f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin info.size = mSource.getSubMediaSetCount(); 3607cf4777f2d6691b5490b7e8df76d154ea5fd8bf7Chih-Chung Chang 3617cf4777f2d6691b5490b7e8df76d154ea5fd8bf7Chih-Chung Chang // If the size becomes smaller after reload(), we may 3627cf4777f2d6691b5490b7e8df76d154ea5fd8bf7Chih-Chung Chang // receive from GetUpdateInfo an index which is too 3637cf4777f2d6691b5490b7e8df76d154ea5fd8bf7Chih-Chung Chang // big. Because the main thread is not aware of the size 3647cf4777f2d6691b5490b7e8df76d154ea5fd8bf7Chih-Chung Chang // change until we call UpdateContent. 3657cf4777f2d6691b5490b7e8df76d154ea5fd8bf7Chih-Chung Chang if (info.index >= info.size) { 3667cf4777f2d6691b5490b7e8df76d154ea5fd8bf7Chih-Chung Chang info.index = INDEX_NONE; 3677cf4777f2d6691b5490b7e8df76d154ea5fd8bf7Chih-Chung Chang } 368f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 369f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (info.index != INDEX_NONE) { 370f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin info.item = mSource.getSubMediaSet(info.index); 371f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (info.item == null) continue; 372f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ArrayList<MediaItem> covers = new ArrayList<MediaItem>(); 373f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin getRepresentativeItems(info.item, MAX_COVER_COUNT, covers); 374f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin info.covers = covers.toArray(new MediaItem[covers.size()]); 375f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 376f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 377f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin executeAndWait(new UpdateContent(info)); 378f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 379f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateLoading(false); 380f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 381f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 382f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public synchronized void notifyDirty() { 383f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mDirty = true; 384f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin notifyAll(); 385f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 386f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 387f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public synchronized void terminate() { 388f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mActive = false; 389f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin notifyAll(); 390f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 391f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 392f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin} 393f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 394f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 395