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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ash/keyboard_uma_event_filter.h" | 5 #include "ash/keyboard_uma_event_filter.h" |
6 | 6 |
7 #include "base/metrics/histogram.h" | 7 #include "base/metrics/histogram.h" |
8 #include "ui/events/event.h" | 8 #include "ui/events/event.h" |
9 | 9 |
10 namespace { | 10 namespace { |
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23 KeyboardUMAEventFilter::~KeyboardUMAEventFilter() {} | 23 KeyboardUMAEventFilter::~KeyboardUMAEventFilter() {} |
24 | 24 |
25 void KeyboardUMAEventFilter::OnKeyEvent(ui::KeyEvent* event) { | 25 void KeyboardUMAEventFilter::OnKeyEvent(ui::KeyEvent* event) { |
26 // This is a rough approximation, so assume that each key release is the | 26 // This is a rough approximation, so assume that each key release is the |
27 // result of a typed key. | 27 // result of a typed key. |
28 if (event->type() != ui::ET_KEY_RELEASED) | 28 if (event->type() != ui::ET_KEY_RELEASED) |
29 return; | 29 return; |
30 | 30 |
31 // Reset the timer on non-character keystrokes. | 31 // Reset the timer on non-character keystrokes. |
32 if (!isprint(event->GetCharacter())) { | 32 if (!isprint(event->GetCharacter())) { |
33 last_keystroke_time_ = base::TimeDelta(); | 33 last_keystroke_time_ = base::TimeTicks(); |
34 return; | 34 return; |
35 } | 35 } |
36 | 36 |
37 if (last_keystroke_time_.ToInternalValue() == 0) { | 37 if (last_keystroke_time_.ToInternalValue() == 0) { |
38 last_keystroke_time_ = event->time_stamp(); | 38 last_keystroke_time_ = event->time_stamp(); |
39 return; | 39 return; |
40 } | 40 } |
41 | 41 |
42 base::TimeDelta delta = event->time_stamp() - last_keystroke_time_; | 42 base::TimeDelta delta = event->time_stamp() - last_keystroke_time_; |
43 if (delta < base::TimeDelta::FromSeconds(kKeystrokeThresholdInSeconds)) | 43 if (delta < base::TimeDelta::FromSeconds(kKeystrokeThresholdInSeconds)) |
44 UMA_HISTOGRAM_TIMES("Keyboard.KeystrokeDeltas", delta); | 44 UMA_HISTOGRAM_TIMES("Keyboard.KeystrokeDeltas", delta); |
45 | 45 |
46 last_keystroke_time_ = event->time_stamp(); | 46 last_keystroke_time_ = event->time_stamp(); |
47 } | 47 } |
48 | 48 |
49 } // namespace ash | 49 } // namespace ash |
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