Patrick Scott | 45948fd | 2010-01-14 15:11:42 -0500 | [diff] [blame] | 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 android.service.urlrenderer; |
| 18 | |
| 19 | import android.os.IBinder; |
| 20 | import android.os.ParcelFileDescriptor; |
| 21 | import android.os.RemoteException; |
| 22 | |
| 23 | import java.util.List; |
| 24 | |
| 25 | /** |
| 26 | * TODO(phanna): Document this class. |
| 27 | * {@hide} while developing |
| 28 | */ |
| 29 | public final class UrlRenderer { |
| 30 | /** |
| 31 | * Interface for clients to receive the result of calls to |
| 32 | * {@link UrlRenderer#render}. |
| 33 | * {@hide} while developing |
| 34 | */ |
| 35 | public interface Callback { |
| 36 | /** |
| 37 | * Calls to {@link render} will result in multiple invokations of this |
| 38 | * method for each url. A null result means that there was a server |
| 39 | * error or a problem rendering the url. |
| 40 | * @param url The url that has been rendered. |
| 41 | * @param result A ParcelFileDescriptor containing the encoded image |
| 42 | * data. The client is responsible for closing the stream |
| 43 | * to free resources. A null result indicates a failure |
| 44 | * to render. |
| 45 | */ |
| 46 | public void complete(String url, ParcelFileDescriptor result); |
| 47 | } |
| 48 | |
| 49 | private IUrlRendererService mService; |
| 50 | |
| 51 | /** |
| 52 | * Create a new UrlRenderer to remotely render urls. |
| 53 | * @param service An IBinder service usually obtained through |
| 54 | * {@link ServiceConnection#onServiceConnected} |
| 55 | */ |
| 56 | public UrlRenderer(IBinder service) { |
| 57 | mService = IUrlRendererService.Stub.asInterface(service); |
| 58 | } |
| 59 | |
| 60 | private static class InternalCallback extends IUrlRendererCallback.Stub { |
| 61 | private final Callback mCallback; |
| 62 | InternalCallback(Callback cb) { |
| 63 | mCallback = cb; |
| 64 | } |
| 65 | |
| 66 | public void complete(String url, ParcelFileDescriptor result) { |
| 67 | mCallback.complete(url, result); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Render the list of <var>urls</var> and invoke the <var>callback</var> |
| 73 | * for each result. |
| 74 | * @param urls A List of urls to render. |
| 75 | * @param width The desired width of the result. |
| 76 | * @param height The desired height of the result. |
| 77 | * @param callback An instance of {@link Callback} invoked for each url. |
| 78 | */ |
| 79 | public void render(List<String> urls, int width, int height, |
| 80 | Callback callback) { |
| 81 | if (mService != null) { |
| 82 | try { |
| 83 | mService.render(urls, width, height, |
| 84 | new InternalCallback(callback)); |
| 85 | } catch (RemoteException ex) { |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | } |