1 /*
2  * Copyright (C) 2019 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 #pragma once
18 
19 #include "InputState.h"
20 
21 #include <input/InputTransport.h>
22 #include <utils/RefBase.h>
23 #include <deque>
24 
25 namespace android::inputdispatcher {
26 
27 struct DispatchEntry;
28 
29 /* Manages the dispatch state associated with a single input channel. */
30 class Connection {
31 public:
32     enum class Status {
33         // Everything is peachy.
34         NORMAL,
35         // An unrecoverable communication error has occurred.
36         BROKEN,
37         // The input channel has been unregistered.
38         ZOMBIE,
39 
40         ftl_first = NORMAL,
41         ftl_last = ZOMBIE,
42     };
43 
44     Status status;
45     bool monitor;
46     InputPublisher inputPublisher;
47     InputState inputState;
48 
49     // True if this connection is responsive.
50     // If this connection is not responsive, avoid publishing more events to it until the
51     // application consumes some of the input.
52     bool responsive = true;
53 
54     // Queue of events that need to be published to the connection.
55     std::deque<std::unique_ptr<DispatchEntry>> outboundQueue;
56 
57     // Queue of events that have been published to the connection but that have not
58     // yet received a "finished" response from the application.
59     std::deque<std::unique_ptr<DispatchEntry>> waitQueue;
60 
61     Connection(std::unique_ptr<InputChannel> inputChannel, bool monitor,
62                const IdGenerator& idGenerator);
63 
getInputChannelName()64     inline const std::string getInputChannelName() const {
65         return inputPublisher.getChannel().getName();
66     }
67 
68     sp<IBinder> getToken() const;
69 };
70 
71 } // namespace android::inputdispatcher
72