Yohei Yukawa | afec9a24 | 2018-12-20 20:53:12 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 com.android.server.textservices; |
| 18 | |
| 19 | import android.annotation.NonNull; |
| 20 | import android.annotation.Nullable; |
| 21 | import android.annotation.UserIdInt; |
| 22 | import android.view.textservice.SpellCheckerInfo; |
| 23 | |
| 24 | import com.android.server.LocalServices; |
| 25 | |
| 26 | /** |
| 27 | * Local interface of {@link TextServicesManagerService} inside system server process. |
| 28 | */ |
| 29 | public abstract class TextServicesManagerInternal { |
| 30 | /** |
| 31 | * Returns the list of installed input methods for the specified user. |
| 32 | * |
| 33 | * <p>CAVEAT: This method is not fully implemented yet. This may return an empty list if |
| 34 | * {@code userId} for a background user is specified. Check the implementation before starting |
| 35 | * this method.</p> |
| 36 | * |
| 37 | * @param userId The user ID to be queried. |
| 38 | * @return {@link SpellCheckerInfo} that is currently selected {@code userId}. |
| 39 | */ |
| 40 | @Nullable |
| 41 | public abstract SpellCheckerInfo getCurrentSpellCheckerForUser(@UserIdInt int userId); |
| 42 | |
| 43 | /** |
| 44 | * Fake implementation of {@link TextServicesManagerInternal}. All the methods do nothing. |
| 45 | */ |
| 46 | private static final TextServicesManagerInternal NOP = |
| 47 | new TextServicesManagerInternal() { |
| 48 | @Override |
| 49 | public SpellCheckerInfo getCurrentSpellCheckerForUser(@UserIdInt int userId) { |
| 50 | return null; |
| 51 | } |
| 52 | }; |
| 53 | |
| 54 | /** |
| 55 | * @return Global instance if exists. Otherwise, a dummy no-op instance. |
| 56 | */ |
| 57 | @NonNull |
| 58 | public static TextServicesManagerInternal get() { |
| 59 | final TextServicesManagerInternal instance = |
| 60 | LocalServices.getService(TextServicesManagerInternal.class); |
| 61 | return instance != null ? instance : NOP; |
| 62 | } |
| 63 | } |