1 /*
2  * Copyright 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 #pragma once
18 
19 #include <optional>
20 #include <set>
21 
22 #include <utils/Timers.h>
23 
24 #include "EventHub.h"
25 #include "InputDevice.h"
26 #include "accumulator/CursorButtonAccumulator.h"
27 #include "accumulator/MultiTouchMotionAccumulator.h"
28 #include "accumulator/TouchButtonAccumulator.h"
29 
30 #include "include/gestures.h"
31 
32 namespace android {
33 
34 // A HardwareState struct, but bundled with a vector to contain its FingerStates, so you don't have
35 // to worry about where that memory is allocated.
36 struct SelfContainedHardwareState {
37     HardwareState state;
38     std::vector<FingerState> fingers;
39 };
40 
41 // Converts RawEvents into the HardwareState structs used by the gestures library.
42 class HardwareStateConverter {
43 public:
44     HardwareStateConverter(const InputDeviceContext& deviceContext,
45                            MultiTouchMotionAccumulator& motionAccumulator);
46 
47     std::optional<SelfContainedHardwareState> processRawEvent(const RawEvent& event);
48     void reset();
49 
50 private:
51     SelfContainedHardwareState produceHardwareState(nsecs_t when);
52 
53     const InputDeviceContext& mDeviceContext;
54     CursorButtonAccumulator mCursorButtonAccumulator;
55     MultiTouchMotionAccumulator& mMotionAccumulator;
56     TouchButtonAccumulator mTouchButtonAccumulator;
57     int32_t mMscTimestamp = 0;
58 };
59 
60 } // namespace android
61