1 /*
2  * Copyright (C) 2022 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.accessibilityservice;
18 
19 import android.annotation.AnyThread;
20 import android.annotation.NonNull;
21 import android.annotation.Nullable;
22 import android.os.Handler;
23 import android.os.Looper;
24 import android.view.inputmethod.EditorInfo;
25 
26 import com.android.internal.inputmethod.IAccessibilityInputMethodSession;
27 import com.android.internal.inputmethod.IRemoteAccessibilityInputConnection;
28 
29 import java.util.concurrent.atomic.AtomicReference;
30 
31 final class AccessibilityInputMethodSessionWrapper extends IAccessibilityInputMethodSession.Stub {
32     private final Handler mHandler;
33 
34     @NonNull
35     private final AtomicReference<AccessibilityInputMethodSession> mSessionRef;
36 
AccessibilityInputMethodSessionWrapper( @onNull Looper looper, @NonNull AccessibilityInputMethodSession session)37     AccessibilityInputMethodSessionWrapper(
38             @NonNull Looper looper, @NonNull AccessibilityInputMethodSession session) {
39         mSessionRef = new AtomicReference<>(session);
40         mHandler = Handler.createAsync(looper);
41     }
42 
43     @AnyThread
44     @Nullable
getSession()45     AccessibilityInputMethodSession getSession() {
46         return mSessionRef.get();
47     }
48 
49     @Override
updateSelection(int oldSelStart, int oldSelEnd, int newSelStart, int newSelEnd, int candidatesStart, int candidatesEnd)50     public void updateSelection(int oldSelStart, int oldSelEnd,
51             int newSelStart, int newSelEnd, int candidatesStart, int candidatesEnd) {
52         if (mHandler.getLooper().isCurrentThread()) {
53             doUpdateSelection(oldSelStart, oldSelEnd, newSelStart, newSelEnd, candidatesStart,
54                     candidatesEnd);
55         } else {
56             mHandler.post(() -> doUpdateSelection(oldSelStart, oldSelEnd, newSelStart,
57                     newSelEnd, candidatesStart, candidatesEnd));
58         }
59     }
60 
doUpdateSelection(int oldSelStart, int oldSelEnd, int newSelStart, int newSelEnd, int candidatesStart, int candidatesEnd)61     private void doUpdateSelection(int oldSelStart, int oldSelEnd,
62             int newSelStart, int newSelEnd, int candidatesStart, int candidatesEnd) {
63         final AccessibilityInputMethodSession session = mSessionRef.get();
64         if (session != null) {
65             session.updateSelection(oldSelStart, oldSelEnd, newSelStart, newSelEnd, candidatesStart,
66                     candidatesEnd);
67         }
68     }
69 
70     @Override
finishInput()71     public void finishInput() {
72         if (mHandler.getLooper().isCurrentThread()) {
73             doFinishInput();
74         } else {
75             mHandler.post(this::doFinishInput);
76         }
77     }
78 
doFinishInput()79     private void doFinishInput() {
80         final AccessibilityInputMethodSession session = mSessionRef.get();
81         if (session != null) {
82             session.finishInput();
83         }
84     }
85 
86     @Override
finishSession()87     public void finishSession() {
88         if (mHandler.getLooper().isCurrentThread()) {
89             doFinishSession();
90         } else {
91             mHandler.post(this::doFinishSession);
92         }
93     }
94 
doFinishSession()95     private void doFinishSession() {
96         mSessionRef.set(null);
97     }
98 
99     @Override
invalidateInput(EditorInfo editorInfo, IRemoteAccessibilityInputConnection connection, int sessionId)100     public void invalidateInput(EditorInfo editorInfo,
101             IRemoteAccessibilityInputConnection connection, int sessionId) {
102         if (mHandler.getLooper().isCurrentThread()) {
103             doInvalidateInput(editorInfo, connection, sessionId);
104         } else {
105             mHandler.post(() -> doInvalidateInput(editorInfo, connection, sessionId));
106         }
107     }
108 
doInvalidateInput(EditorInfo editorInfo, IRemoteAccessibilityInputConnection connection, int sessionId)109     private void doInvalidateInput(EditorInfo editorInfo,
110             IRemoteAccessibilityInputConnection connection, int sessionId) {
111         final AccessibilityInputMethodSession session = mSessionRef.get();
112         if (session != null) {
113             session.invalidateInput(editorInfo, connection, sessionId);
114         }
115     }
116 }
117