| /* |
| * Copyright (C) 2013 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.camera.data; |
| |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| import android.view.View; |
| |
| import com.android.camera.Storage; |
| import com.android.camera.debug.Log; |
| import com.android.camera.filmstrip.ImageData; |
| import com.android.camera.util.Callback; |
| |
| import java.util.ArrayList; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| /** |
| * A {@link LocalDataAdapter} that provides data in the camera folder. |
| */ |
| public class CameraDataAdapter implements LocalDataAdapter { |
| private static final Log.Tag TAG = new Log.Tag("CameraDataAdapter"); |
| |
| private static final int DEFAULT_DECODE_SIZE = 1600; |
| |
| private final Context mContext; |
| |
| private LocalDataList mImages; |
| |
| private Listener mListener; |
| private LocalDataListener mLocalDataListener; |
| private final int mPlaceHolderResourceId; |
| |
| private int mSuggestedWidth = DEFAULT_DECODE_SIZE; |
| private int mSuggestedHeight = DEFAULT_DECODE_SIZE; |
| private long mLastPhotoId = LocalMediaData.QUERY_ALL_MEDIA_ID; |
| |
| private LocalData mLocalDataToDelete; |
| |
| public CameraDataAdapter(Context context, int placeholderResource) { |
| mContext = context; |
| mImages = new LocalDataList(); |
| mPlaceHolderResourceId = placeholderResource; |
| } |
| |
| @Override |
| public void setLocalDataListener(LocalDataListener listener) { |
| mLocalDataListener = listener; |
| } |
| |
| @Override |
| public void requestLoadNewPhotos() { |
| LoadNewPhotosTask ltask = new LoadNewPhotosTask(mLastPhotoId); |
| ltask.execute(mContext.getContentResolver()); |
| } |
| |
| @Override |
| public void requestLoad(Callback<Void> doneCallback) { |
| QueryTask qtask = new QueryTask(doneCallback); |
| qtask.execute(mContext); |
| } |
| |
| @Override |
| public AsyncTask updateMetadata(int dataId) { |
| MetadataUpdateTask result = new MetadataUpdateTask(); |
| result.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, dataId); |
| return result; |
| } |
| |
| @Override |
| public boolean isMetadataUpdated(int dataId) { |
| if (dataId < 0 || dataId >= mImages.size()) { |
| return true; |
| } |
| return mImages.get(dataId).isMetadataUpdated(); |
| } |
| |
| @Override |
| public int getItemViewType(int dataId) { |
| if (dataId < 0 || dataId >= mImages.size()) { |
| return -1; |
| } |
| |
| return mImages.get(dataId).getItemViewType().ordinal(); |
| } |
| |
| @Override |
| public LocalData getLocalData(int dataID) { |
| if (dataID < 0 || dataID >= mImages.size()) { |
| return null; |
| } |
| return mImages.get(dataID); |
| } |
| |
| @Override |
| public int getTotalNumber() { |
| return mImages.size(); |
| } |
| |
| @Override |
| public ImageData getImageData(int id) { |
| return getLocalData(id); |
| } |
| |
| @Override |
| public void suggestViewSizeBound(int w, int h) { |
| mSuggestedWidth = w; |
| mSuggestedHeight = h; |
| } |
| |
| @Override |
| public View getView(Context context, View recycled, int dataID) { |
| if (dataID >= mImages.size() || dataID < 0) { |
| return null; |
| } |
| |
| return mImages.get(dataID).getView( |
| context, recycled, mSuggestedWidth, mSuggestedHeight, |
| mPlaceHolderResourceId, this, /* inProgress */ false); |
| } |
| |
| @Override |
| public void resizeView(Context context, int dataID, View view, int w, int h) { |
| if (dataID >= mImages.size() || dataID < 0) { |
| return; |
| } |
| mImages.get(dataID).loadFullImage(context, mSuggestedWidth, mSuggestedHeight, view, this); |
| } |
| |
| @Override |
| public void setListener(Listener listener) { |
| mListener = listener; |
| if (mImages.size() != 0) { |
| mListener.onDataLoaded(); |
| } |
| } |
| |
| @Override |
| public boolean canSwipeInFullScreen(int dataID) { |
| if (dataID < mImages.size() && dataID > 0) { |
| return mImages.get(dataID).canSwipeInFullScreen(); |
| } |
| return true; |
| } |
| |
| @Override |
| public void removeData(int dataID) { |
| LocalData d = mImages.remove(dataID); |
| if (d == null) { |
| return; |
| } |
| |
| // Delete previously removed data first. |
| executeDeletion(); |
| mLocalDataToDelete = d; |
| mListener.onDataRemoved(dataID, d); |
| } |
| |
| @Override |
| public boolean addData(LocalData newData) { |
| final Uri uri = newData.getUri(); |
| int pos = findDataByContentUri(uri); |
| if (pos != -1) { |
| // a duplicate one, just do a substitute. |
| Log.v(TAG, "found duplicate data"); |
| updateData(pos, newData); |
| return false; |
| } else { |
| // a new data. |
| insertData(newData); |
| return true; |
| } |
| } |
| |
| @Override |
| public int findDataByContentUri(Uri uri) { |
| // LocalDataList will return in O(1) if the uri is not contained. |
| // Otherwise the performance is O(n), but this is acceptable as we will |
| // most often call this to find an element at the beginning of the list. |
| return mImages.indexOf(uri); |
| } |
| |
| @Override |
| public boolean undoDataRemoval() { |
| if (mLocalDataToDelete == null) { |
| return false; |
| } |
| LocalData d = mLocalDataToDelete; |
| mLocalDataToDelete = null; |
| insertData(d); |
| return true; |
| } |
| |
| @Override |
| public boolean executeDeletion() { |
| if (mLocalDataToDelete == null) { |
| return false; |
| } |
| |
| DeletionTask task = new DeletionTask(); |
| task.execute(mLocalDataToDelete); |
| mLocalDataToDelete = null; |
| return true; |
| } |
| |
| @Override |
| public void flush() { |
| replaceData(new LocalDataList()); |
| } |
| |
| @Override |
| public void refresh(Uri uri) { |
| final int pos = findDataByContentUri(uri); |
| if (pos == -1) { |
| return; |
| } |
| |
| LocalData data = mImages.get(pos); |
| LocalData refreshedData = data.refresh(mContext); |
| |
| // Refresh failed. Probably removed already. |
| if (refreshedData == null && mListener != null) { |
| mListener.onDataRemoved(pos, data); |
| return; |
| } |
| updateData(pos, refreshedData); |
| } |
| |
| @Override |
| public void updateData(final int pos, LocalData data) { |
| mImages.set(pos, data); |
| if (mListener != null) { |
| mListener.onDataUpdated(new UpdateReporter() { |
| @Override |
| public boolean isDataRemoved(int dataID) { |
| return false; |
| } |
| |
| @Override |
| public boolean isDataUpdated(int dataID) { |
| return (dataID == pos); |
| } |
| }); |
| } |
| } |
| |
| private void insertData(LocalData data) { |
| // Since this function is mostly for adding the newest data, |
| // a simple linear search should yield the best performance over a |
| // binary search. |
| int pos = 0; |
| Comparator<LocalData> comp = new LocalData.NewestFirstComparator(); |
| for (; pos < mImages.size() |
| && comp.compare(data, mImages.get(pos)) > 0; pos++) { |
| ; |
| } |
| mImages.add(pos, data); |
| if (mListener != null) { |
| mListener.onDataInserted(pos, data); |
| } |
| } |
| |
| /** Update all the data */ |
| private void replaceData(LocalDataList list) { |
| if (list.size() == 0 && mImages.size() == 0) { |
| return; |
| } |
| mImages = list; |
| if (mListener != null) { |
| mListener.onDataLoaded(); |
| } |
| } |
| |
| @Override |
| public List<AsyncTask> preloadItems(List<Integer> items) { |
| List<AsyncTask> result = new ArrayList<AsyncTask>(); |
| for (Integer id : items) { |
| if (!isMetadataUpdated(id)) { |
| result.add(updateMetadata(id)); |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| public void cancelItems(List<AsyncTask> loadTokens) { |
| for (AsyncTask asyncTask : loadTokens) { |
| if (asyncTask != null) { |
| asyncTask.cancel(false); |
| } |
| } |
| } |
| |
| @Override |
| public List<Integer> getItemsInRange(int startPosition, int endPosition) { |
| List<Integer> result = new ArrayList<Integer>(); |
| for (int i = Math.max(0, startPosition); i < endPosition; i++) { |
| result.add(i); |
| } |
| return result; |
| } |
| |
| @Override |
| public int getCount() { |
| return getTotalNumber(); |
| } |
| |
| private class LoadNewPhotosTask extends AsyncTask<ContentResolver, Void, List<LocalData>> { |
| |
| private final long mMinPhotoId; |
| |
| public LoadNewPhotosTask(long lastPhotoId) { |
| mMinPhotoId = lastPhotoId; |
| } |
| |
| /** |
| * Loads any new photos added to our storage directory since our last query. |
| * @param contentResolvers {@link android.content.ContentResolver} to load data. |
| * @return An {@link java.util.ArrayList} containing any new data. |
| */ |
| @Override |
| protected List<LocalData> doInBackground(ContentResolver... contentResolvers) { |
| if (mMinPhotoId != LocalMediaData.QUERY_ALL_MEDIA_ID) { |
| final ContentResolver cr = contentResolvers[0]; |
| return LocalMediaData.PhotoData.query(cr, LocalMediaData.PhotoData.CONTENT_URI, |
| mMinPhotoId); |
| } |
| return new ArrayList<LocalData>(0); |
| } |
| |
| @Override |
| protected void onPostExecute(List<LocalData> newPhotoData) { |
| if (!newPhotoData.isEmpty()) { |
| LocalData newestPhoto = newPhotoData.get(0); |
| // We may overlap with another load task or a query task, in which case we want |
| // to be sure we never decrement the oldest seen id. |
| mLastPhotoId = Math.max(mLastPhotoId, newestPhoto.getContentId()); |
| } |
| // We may add data that is already present, but if we do, it will be deduped in addData. |
| // addData does not dedupe session items, so we ignore them here |
| for (LocalData localData : newPhotoData) { |
| Uri sessionUri = Storage.getSessionUriFromContentUri(localData.getUri()); |
| if (sessionUri == null) { |
| addData(localData); |
| } |
| } |
| } |
| } |
| |
| private class QueryTaskResult { |
| public LocalDataList mLocalDataList; |
| public long mLastPhotoId; |
| |
| public QueryTaskResult(LocalDataList localDataList, long lastPhotoId) { |
| mLocalDataList = localDataList; |
| mLastPhotoId = lastPhotoId; |
| } |
| } |
| |
| private class QueryTask extends AsyncTask<Context, Void, QueryTaskResult> { |
| // The maximum number of data to load metadata for in a single task. |
| private static final int MAX_METADATA = 5; |
| |
| private final Callback<Void> mDoneCallback; |
| |
| public QueryTask(Callback<Void> doneCallback) { |
| mDoneCallback = doneCallback; |
| } |
| |
| /** |
| * Loads all the photo and video data in the camera folder in background |
| * and combine them into one single list. |
| * |
| * @param contexts {@link Context} to load all the data. |
| * @return An {@link com.android.camera.data.CameraDataAdapter.QueryTaskResult} containing |
| * all loaded data and the highest photo id in the dataset. |
| */ |
| @Override |
| protected QueryTaskResult doInBackground(Context... contexts) { |
| final Context context = contexts[0]; |
| final ContentResolver cr = context.getContentResolver(); |
| LocalDataList l = new LocalDataList(); |
| // Photos |
| List<LocalData> photoData = LocalMediaData.PhotoData.query(cr, |
| LocalMediaData.PhotoData.CONTENT_URI, LocalMediaData.QUERY_ALL_MEDIA_ID); |
| List<LocalData> videoData = LocalMediaData.VideoData.query(cr, |
| LocalMediaData.VideoData.CONTENT_URI, LocalMediaData.QUERY_ALL_MEDIA_ID); |
| |
| long lastPhotoId = LocalMediaData.QUERY_ALL_MEDIA_ID; |
| if (!photoData.isEmpty()) { |
| lastPhotoId = photoData.get(0).getContentId(); |
| } |
| |
| l.addAll(photoData); |
| l.addAll(videoData); |
| l.sort(new LocalData.NewestFirstComparator()); |
| |
| // Load enough metadata so it's already loaded when we open the filmstrip. |
| for (int i = 0; i < MAX_METADATA && i < l.size(); i++) { |
| LocalData data = l.get(i); |
| MetadataLoader.loadMetadata(context, data); |
| } |
| return new QueryTaskResult(l, lastPhotoId); |
| } |
| |
| @Override |
| protected void onPostExecute(QueryTaskResult result) { |
| // Since we're wiping away all of our data, we should always replace any existing last |
| // photo id with the new one we just obtained so it matches the data we're showing. |
| mLastPhotoId = result.mLastPhotoId; |
| replaceData(result.mLocalDataList); |
| if (mDoneCallback != null) { |
| mDoneCallback.onCallback(null); |
| } |
| // Now check for any photos added since this task was kicked off |
| LoadNewPhotosTask ltask = new LoadNewPhotosTask(mLastPhotoId); |
| ltask.execute(mContext.getContentResolver()); |
| } |
| } |
| |
| private class DeletionTask extends AsyncTask<LocalData, Void, Void> { |
| @Override |
| protected Void doInBackground(LocalData... data) { |
| for (int i = 0; i < data.length; i++) { |
| if (!data[i].isDataActionSupported(LocalData.DATA_ACTION_DELETE)) { |
| Log.v(TAG, "Deletion is not supported:" + data[i]); |
| continue; |
| } |
| data[i].delete(mContext); |
| } |
| return null; |
| } |
| } |
| |
| private class MetadataUpdateTask extends AsyncTask<Integer, Void, List<Integer> > { |
| @Override |
| protected List<Integer> doInBackground(Integer... dataId) { |
| List<Integer> updatedList = new ArrayList<Integer>(); |
| for (Integer id : dataId) { |
| if (id < 0 || id >= mImages.size()) { |
| continue; |
| } |
| final LocalData data = mImages.get(id); |
| if (MetadataLoader.loadMetadata(mContext, data)) { |
| updatedList.add(id); |
| } |
| } |
| return updatedList; |
| } |
| |
| @Override |
| protected void onPostExecute(final List<Integer> updatedData) { |
| // Since the metadata will affect the width and height of the data |
| // if it's a video, we need to notify the DataAdapter listener |
| // because ImageData.getWidth() and ImageData.getHeight() now may |
| // return different values due to the metadata. |
| if (mListener != null) { |
| mListener.onDataUpdated(new UpdateReporter() { |
| @Override |
| public boolean isDataRemoved(int dataID) { |
| return false; |
| } |
| |
| @Override |
| public boolean isDataUpdated(int dataID) { |
| return updatedData.contains(dataID); |
| } |
| }); |
| } |
| if (mLocalDataListener == null) { |
| return; |
| } |
| mLocalDataListener.onMetadataUpdated(updatedData); |
| } |
| } |
| } |