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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef UI_EVENTS_OZONE_EVDEV_TOUCH_NOISE_TOUCH_NOISE_FINDER_H_ | |
6 #define UI_EVENTS_OZONE_EVDEV_TOUCH_NOISE_TOUCH_NOISE_FINDER_H_ | |
7 | |
8 #include <bitset> | |
9 #include <vector> | |
10 | |
11 #include "base/basictypes.h" | |
12 #include "base/time/time.h" | |
13 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h" | |
14 #include "ui/events/ozone/evdev/touch_evdev_types.h" | |
15 | |
16 namespace ui { | |
17 class TouchNoiseFilter; | |
18 | |
19 // Finds touches which are likely touch noise. | |
20 class EVENTS_OZONE_EVDEV_EXPORT TouchNoiseFinder { | |
21 public: | |
22 TouchNoiseFinder(); | |
23 ~TouchNoiseFinder(); | |
24 | |
25 // Updates which ABS_MT_SLOTs are likely noise. |touches| should contain all | |
26 // of the in-progress touches at |time| (including suspected noisy touches). | |
27 // |touches| should have at most one entry per ABS_MT_SLOT. | |
28 void HandleTouches(const std::vector<InProgressTouchEvdev>& touches, | |
29 base::TimeDelta time); | |
30 | |
31 // Returns whether the in-progress touch at ABS_MT_SLOT |slot| is likely | |
32 // noise. | |
33 bool SlotHasNoise(size_t slot) const; | |
34 | |
35 private: | |
36 friend class TouchEventConverterEvdevTouchNoiseTest; | |
37 | |
38 // The slots which are likely noise. | |
39 std::bitset<kNumTouchEvdevSlots> slots_with_noise_; | |
40 | |
41 std::vector<TouchNoiseFilter*> filters_; | |
42 | |
43 DISALLOW_COPY_AND_ASSIGN(TouchNoiseFinder); | |
44 }; | |
45 | |
46 } // namespace ui | |
47 | |
48 #endif // UI_EVENTS_OZONE_EVDEV_TOUCH_NOISE_TOUCH_NOISE_FINDER_H_ | |
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