| /* |
| * Copyright (C) 2020 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 android.service.search; |
| |
| import static com.android.internal.util.function.pooled.PooledLambda.obtainMessage; |
| |
| import android.annotation.CallSuper; |
| import android.annotation.MainThread; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.annotation.SystemApi; |
| import android.app.Service; |
| import android.app.search.ISearchCallback; |
| import android.app.search.Query; |
| import android.app.search.SearchContext; |
| import android.app.search.SearchSessionId; |
| import android.app.search.SearchTarget; |
| import android.app.search.SearchTargetEvent; |
| import android.content.Intent; |
| import android.content.pm.ParceledListSlice; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.RemoteException; |
| import android.service.search.ISearchUiService.Stub; |
| import android.util.Slog; |
| |
| import java.util.List; |
| import java.util.function.Consumer; |
| |
| /** |
| * A service used to share the lifecycle of search UI (open, close, interaction) |
| * and also to return search result on a query. |
| * |
| * To understand the lifecycle of search session and how a query get issued, |
| * {@see SearchSession} |
| * |
| * @hide |
| */ |
| @SystemApi |
| public abstract class SearchUiService extends Service { |
| |
| private static final boolean DEBUG = false; |
| private static final String TAG = "SearchUiService"; |
| |
| /** |
| * The {@link Intent} that must be declared as handled by the service. |
| * |
| * <p>The service must also require the {@link android.permission#MANAGE_SEARCH_UI} |
| * permission. |
| * |
| * @hide |
| */ |
| public static final String SERVICE_INTERFACE = |
| "android.service.search.SearchUiService"; |
| |
| private Handler mHandler; |
| |
| private final android.service.search.ISearchUiService mInterface = new Stub() { |
| |
| @Override |
| public void onCreateSearchSession(SearchContext context, SearchSessionId sessionId) { |
| mHandler.sendMessage( |
| obtainMessage(SearchUiService::onSearchSessionCreated, |
| SearchUiService.this, context, sessionId)); |
| // to be removed |
| mHandler.sendMessage( |
| obtainMessage(SearchUiService::onCreateSearchSession, |
| SearchUiService.this, context, sessionId)); |
| } |
| |
| @Override |
| public void onQuery(SearchSessionId sessionId, Query input, |
| ISearchCallback callback) { |
| mHandler.sendMessage( |
| obtainMessage(SearchUiService::onQuery, |
| SearchUiService.this, sessionId, input, |
| new CallbackWrapper(callback, null))); |
| } |
| |
| @Override |
| public void onNotifyEvent(SearchSessionId sessionId, Query query, SearchTargetEvent event) { |
| mHandler.sendMessage( |
| obtainMessage(SearchUiService::onNotifyEvent, |
| SearchUiService.this, sessionId, query, event)); |
| } |
| |
| @Override |
| public void onDestroy(SearchSessionId sessionId) { |
| mHandler.sendMessage( |
| obtainMessage(SearchUiService::doDestroy, |
| SearchUiService.this, sessionId)); |
| } |
| }; |
| |
| @CallSuper |
| @Override |
| public void onCreate() { |
| super.onCreate(); |
| mHandler = new Handler(Looper.getMainLooper(), null, true); |
| } |
| |
| @Override |
| @NonNull |
| public final IBinder onBind(@NonNull Intent intent) { |
| if (SERVICE_INTERFACE.equals(intent.getAction())) { |
| return mInterface.asBinder(); |
| } |
| Slog.w(TAG, "Tried to bind to wrong intent (should be " |
| + SERVICE_INTERFACE + ": " + intent); |
| return null; |
| } |
| |
| /** |
| * Creates a new search session. |
| * |
| * @deprecated this is method will be removed as soon as |
| * {@link #onSearchSessionCreated(SearchContext, SearchSessionId)} |
| * is adopted by the service. |
| * |
| * @removed |
| */ |
| @Deprecated |
| public void onCreateSearchSession(@NonNull SearchContext context, |
| @NonNull SearchSessionId sessionId) {} |
| |
| /** |
| * A new search session is created. |
| */ |
| public void onSearchSessionCreated(@NonNull SearchContext context, |
| @NonNull SearchSessionId sessionId) {} |
| |
| /** |
| * Called by the client to request search results using a query string. |
| */ |
| @MainThread |
| public abstract void onQuery(@NonNull SearchSessionId sessionId, |
| @NonNull Query query, |
| @NonNull Consumer<List<SearchTarget>> callback); |
| |
| /** |
| * Called by a client to indicate an interaction (tap, long press, drag, etc) on target(s) |
| * and lifecycle event on the search surface (e.g., visibility change). |
| * |
| * {@see SearchTargetEvent} |
| */ |
| @MainThread |
| public abstract void onNotifyEvent(@NonNull SearchSessionId sessionId, |
| @NonNull Query query, |
| @NonNull SearchTargetEvent event); |
| |
| private void doDestroy(@NonNull SearchSessionId sessionId) { |
| super.onDestroy(); |
| onDestroy(sessionId); |
| } |
| |
| /** |
| * Destroys a search session. |
| */ |
| @MainThread |
| public abstract void onDestroy(@NonNull SearchSessionId sessionId); |
| |
| private static final class CallbackWrapper implements Consumer<List<SearchTarget>>, |
| IBinder.DeathRecipient { |
| |
| private ISearchCallback mCallback; |
| private final Consumer<CallbackWrapper> mOnBinderDied; |
| |
| CallbackWrapper(ISearchCallback callback, |
| @Nullable Consumer<CallbackWrapper> onBinderDied) { |
| mCallback = callback; |
| mOnBinderDied = onBinderDied; |
| try { |
| mCallback.asBinder().linkToDeath(this, 0); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Failed to link to death: " + e); |
| } |
| } |
| |
| @Override |
| public void accept(List<SearchTarget> searchTargets) { |
| try { |
| if (mCallback != null) { |
| if (DEBUG) { |
| Slog.d(TAG, "CallbackWrapper.accept searchTargets=" + searchTargets); |
| } |
| mCallback.onResult(new ParceledListSlice(searchTargets)); |
| } |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Error sending result:" + e); |
| } |
| } |
| |
| @Override |
| public void binderDied() { |
| mCallback.asBinder().unlinkToDeath(this, 0); |
| mCallback = null; |
| if (mOnBinderDied != null) { |
| mOnBinderDied.accept(this); |
| } |
| } |
| } |
| } |