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1 // Copyright 2017 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_IDLE_FRACTION_RECORDER_H_ | |
6 #define UI_EVENTS_IDLE_FRACTION_RECORDER_H_ | |
7 | |
8 #include "base/time/time.h" | |
9 #include "ui/events/events_base_export.h" | |
10 | |
11 namespace ui { | |
12 | |
13 // Receives as input a set of timestamps indicating when events were | |
14 // received. Reports via UMA the fraction of the time per |window_size_| that | |
15 // the user was interacting. | |
16 class EVENTS_BASE_EXPORT FractionOfTimeWithoutUserInputRecorder { | |
17 public: | |
18 FractionOfTimeWithoutUserInputRecorder(); | |
19 void RecordEventAtTime(base::TimeTicks start_time); | |
20 | |
21 protected: | |
22 // We report the fraction of the time we were idle once per |window_size_|. | |
23 base::TimeDelta window_size_; | |
24 | |
25 // Two events within |idle_timeout_| of one another are considered to be in | |
26 // the same period of user activity. | |
27 base::TimeDelta idle_timeout_; | |
28 | |
29 virtual void RecordActiveInterval(base::TimeTicks start_time, | |
30 base::TimeTicks end_time); | |
31 virtual void RecordToUma(float idle_fraction) const; | |
sadrul
2017/03/24 17:29:33
This no longer needs to be virtual.
tdresser
2017/03/27 18:59:26
Done.
| |
32 | |
33 private: | |
34 // Within the current period of length |window_size_|, how long has the user | |
35 // been active? | |
36 base::TimeDelta current_window_active_time_; | |
37 // If the user is currently active, when did they start being active? | |
38 base::TimeTicks active_duration_start_time_; | |
39 base::TimeTicks window_start_time_; | |
40 base::TimeTicks previous_event_end_time_; | |
41 }; | |
42 | |
43 } // namespace ui | |
44 | |
45 #endif // UI_EVENTS_IDLE_FRACTION_RECORDER_H_ | |
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