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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 #include "ui/events/ozone/evdev/touch_noise/touch_noise_remover.h" | |
6 | |
7 #include "base/logging.h" | |
8 #include "base/stl_util.h" | |
9 #include "base/strings/stringprintf.h" | |
10 #include "base/time/time.h" | |
11 #include "ui/events/event.h" | |
12 #include "ui/events/ozone/evdev/device_event_dispatcher_evdev.h" | |
13 #include "ui/events/ozone/evdev/touch_noise/far_apart_taps_touch_noise_filter.h" | |
14 #include "ui/events/ozone/evdev/touch_noise/horizontally_aligned_touch_noise_fil ter.h" | |
15 #include "ui/events/ozone/evdev/touch_noise/single_position_touch_noise_filter.h " | |
16 | |
17 namespace ui { | |
18 | |
19 TouchNoiseRemover::TouchNoiseRemover() { | |
20 filters_.push_back(new FarApartTapsTouchNoiseFilter); | |
21 filters_.push_back(new HorizontallyAlignedTouchNoiseFilter); | |
22 filters_.push_back(new SinglePositionTouchNoiseFilter); | |
23 } | |
24 | |
25 TouchNoiseRemover::~TouchNoiseRemover() { | |
26 STLDeleteElements(&filters_); | |
27 } | |
28 | |
29 void TouchNoiseRemover::RemoveNoise( | |
30 std::vector<ui::TouchEventParams>* touches, | |
31 base::TimeDelta timestamp) { | |
32 TouchNoiseFilter::Frame prev_frame = frame_; | |
33 const int num_slots = static_cast<int>(arraysize(frame_.fingers)); | |
34 frame_.timestamp = timestamp; | |
35 for (const ui::TouchEventParams& touch : *touches) { | |
36 int slot = touch.touch_id; | |
37 if (slot < 0 || slot >= num_slots) | |
flackr
2015/03/10 05:23:40
Why do we need to check for slot < 0 || slot >= nu
| |
38 continue; | |
39 | |
40 DCHECK_EQ(timestamp, touch.timestamp); | |
41 frame_.fingers[slot].location = touch.location; | |
42 frame_.fingers[slot].tracking_id = | |
43 (touch.type == ET_TOUCH_RELEASED) ? -1 : touch.tracking_id; | |
44 | |
45 if (touch.type == ET_TOUCH_PRESSED) | |
46 frame_.fingers[slot].canceled = false; | |
47 } | |
48 | |
49 for (TouchNoiseFilter* filter : filters_) | |
50 filter->FilterFrame(&prev_frame, &frame_); | |
51 | |
52 for (auto it = touches->begin(); it != touches->end();) { | |
53 int slot = it->touch_id; | |
54 if (slot < 0 || slot >= num_slots || frame_.fingers[slot].canceled) { | |
flackr
2015/03/10 05:23:40
ditto
| |
55 VLOG(2) << base::StringPrintf("TrackingID %d cancelled", it->tracking_id); | |
56 it = touches->erase(it); | |
flackr
2015/03/10 05:23:40
Should use std::remove_if for linear complexity.
| |
57 } else { | |
58 ++it; | |
59 } | |
60 } | |
61 } | |
62 | |
63 } // namespace ui | |
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