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-rw-r--r--src/com/android/gallery3d/app/PanoramaMetadataSupport.java93
1 files changed, 93 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/app/PanoramaMetadataSupport.java b/src/com/android/gallery3d/app/PanoramaMetadataSupport.java
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+/*
+ * 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;
+ }
+ }
+}