| /* |
| * Copyright (C) 2012 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.app; |
| |
| import com.android.gallery3d.data.MediaObject; |
| import com.android.gallery3d.data.MediaObject.PanoramaSupportCallback; |
| import com.android.gallery3d.data.PanoramaMetadataJob; |
| import com.android.gallery3d.util.Future; |
| import com.android.gallery3d.util.FutureListener; |
| import com.android.gallery3d.util.LightCycleHelper; |
| import com.android.gallery3d.util.LightCycleHelper.PanoramaMetadata; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * This class breaks out the off-thread panorama support checks so that the |
| * complexity can be shared between UriImage and LocalImage, which need to |
| * support panoramas. |
| */ |
| public class PanoramaMetadataSupport implements FutureListener<PanoramaMetadata> { |
| private Object mLock = new Object(); |
| private Future<PanoramaMetadata> mGetPanoMetadataTask; |
| private PanoramaMetadata mPanoramaMetadata; |
| private ArrayList<PanoramaSupportCallback> mCallbacksWaiting; |
| private MediaObject mMediaObject; |
| |
| public PanoramaMetadataSupport(MediaObject mediaObject) { |
| mMediaObject = mediaObject; |
| } |
| |
| public void getPanoramaSupport(GalleryApp app, PanoramaSupportCallback callback) { |
| synchronized (mLock) { |
| if (mPanoramaMetadata != null) { |
| callback.panoramaInfoAvailable(mMediaObject, mPanoramaMetadata.mUsePanoramaViewer, |
| mPanoramaMetadata.mIsPanorama360); |
| } else { |
| if (mCallbacksWaiting == null) { |
| mCallbacksWaiting = new ArrayList<PanoramaSupportCallback>(); |
| mGetPanoMetadataTask = app.getThreadPool().submit( |
| new PanoramaMetadataJob(app.getAndroidContext(), |
| mMediaObject.getContentUri()), this); |
| |
| } |
| mCallbacksWaiting.add(callback); |
| } |
| } |
| } |
| |
| public void clearCachedValues() { |
| synchronized (mLock) { |
| if (mPanoramaMetadata != null) { |
| mPanoramaMetadata = null; |
| } else if (mGetPanoMetadataTask != null) { |
| mGetPanoMetadataTask.cancel(); |
| for (PanoramaSupportCallback cb : mCallbacksWaiting) { |
| cb.panoramaInfoAvailable(mMediaObject, false, false); |
| } |
| mGetPanoMetadataTask = null; |
| mCallbacksWaiting = null; |
| } |
| } |
| } |
| |
| @Override |
| public void onFutureDone(Future<PanoramaMetadata> future) { |
| synchronized (mLock) { |
| mPanoramaMetadata = future.get(); |
| if (mPanoramaMetadata == null) { |
| // Error getting panorama data from file. Treat as not panorama. |
| mPanoramaMetadata = LightCycleHelper.NOT_PANORAMA; |
| } |
| for (PanoramaSupportCallback cb : mCallbacksWaiting) { |
| cb.panoramaInfoAvailable(mMediaObject, mPanoramaMetadata.mUsePanoramaViewer, |
| mPanoramaMetadata.mIsPanorama360); |
| } |
| mGetPanoMetadataTask = null; |
| mCallbacksWaiting = null; |
| } |
| } |
| } |