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 #ifndef _UI_INPUT_INPUTDISPATCHER_CONNECTION_H
18 #define _UI_INPUT_INPUTDISPATCHER_CONNECTION_H
19 
20 #include "InputState.h"
21 
22 #include <input/InputTransport.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 : public RefBase {
31 protected:
32     virtual ~Connection();
33 
34 public:
35     enum Status {
36         // Everything is peachy.
37         STATUS_NORMAL,
38         // An unrecoverable communication error has occurred.
39         STATUS_BROKEN,
40         // The input channel has been unregistered.
41         STATUS_ZOMBIE
42     };
43 
44     Status status;
45     sp<InputChannel> inputChannel; // never null
46     bool monitor;
47     InputPublisher inputPublisher;
48     InputState inputState;
49 
50     // True if this connection is responsive.
51     // If this connection is not responsive, avoid publishing more events to it until the
52     // application consumes some of the input.
53     bool responsive = true;
54 
55     // Queue of events that need to be published to the connection.
56     std::deque<DispatchEntry*> outboundQueue;
57 
58     // Queue of events that have been published to the connection but that have not
59     // yet received a "finished" response from the application.
60     std::deque<DispatchEntry*> waitQueue;
61 
62     Connection(const sp<InputChannel>& inputChannel, bool monitor, const IdGenerator& idGenerator);
63 
getInputChannelName()64     inline const std::string getInputChannelName() const { return inputChannel->getName(); }
65 
66     const std::string getWindowName() const;
67     const char* getStatusLabel() const;
68 
69     std::deque<DispatchEntry*>::iterator findWaitQueueEntry(uint32_t seq);
70 };
71 
72 } // namespace android::inputdispatcher
73 
74 #endif // _UI_INPUT_INPUTDISPATCHER_CONNECTION_H
75