1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <optional>
#include <set>
#include "InputListener.h"
namespace android {
/**
* When stylus is down, all touch is ignored.
* TODO(b/210159205): delete this when simultaneous stylus and touch is supported
*/
class PreferStylusOverTouchBlocker {
public:
/**
* Process the provided event and emit 0 or more events that should be used instead of it.
* In the majority of cases, the returned result will just be the provided args (array with
* only 1 element), unmodified.
*
* If the gesture should be blocked, the returned result may be:
*
* a) An empty array, if the current event should just be ignored completely
* b) An array of N elements, containing N-1 events with ACTION_CANCEL and the current event.
*
* The returned result is intended to be reinjected into the original event stream in
* replacement of the incoming event.
*/
std::vector<NotifyMotionArgs> processMotion(const NotifyMotionArgs& args);
std::string dump() const;
void notifyInputDevicesChanged(const std::vector<InputDeviceInfo>& inputDevices);
void notifyDeviceReset(const NotifyDeviceResetArgs& args);
private:
// Stores the device id's of styli that are currently down.
std::set<int32_t /*deviceId*/> mActiveStyli;
// For each device, store the last touch event as long as the touch is down. Upon liftoff,
// the entry is erased.
std::map<int32_t /*deviceId*/, NotifyMotionArgs> mLastTouchEvents;
// Device ids of devices for which the current touch gesture is canceled.
std::set<int32_t /*deviceId*/> mCanceledDevices;
// Device ids of input devices where we encountered simultaneous touch and stylus
// events. For these devices, we don't do any event processing (nothing is blocked or altered).
std::set<int32_t /*deviceId*/> mDevicesWithMixedToolType;
};
} // namespace android
|
