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| 1 // Copyright 2014 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_WM_CORE_USER_ACTIVITY_DETECTOR_H_ | |
| 6 #define UI_WM_CORE_USER_ACTIVITY_DETECTOR_H_ | |
| 7 | |
| 8 #include "base/basictypes.h" | |
| 9 #include "base/compiler_specific.h" | |
| 10 #include "base/observer_list.h" | |
| 11 #include "base/time/time.h" | |
| 12 #include "ui/events/event_handler.h" | |
| 13 #include "ui/wm/wm_export.h" | |
| 14 | |
| 15 namespace wm { | |
| 16 | |
| 17 class UserActivityObserver; | |
| 18 | |
| 19 // Watches for input events and notifies observers that the user is active. | |
| 20 class WM_EXPORT UserActivityDetector : public ui::EventHandler { | |
| 21 public: | |
| 22 // Minimum amount of time between notifications to observers. | |
| 23 static const int kNotifyIntervalMs; | |
| 24 | |
| 25 // Amount of time that mouse events should be ignored after notification | |
| 26 // is received that displays' power states are being changed. | |
| 27 static const int kDisplayPowerChangeIgnoreMouseMs; | |
| 28 | |
| 29 UserActivityDetector(); | |
| 30 virtual ~UserActivityDetector(); | |
| 31 | |
| 32 base::TimeTicks last_activity_time() const { return last_activity_time_; } | |
| 33 | |
| 34 void set_now_for_test(base::TimeTicks now) { now_for_test_ = now; } | |
| 35 | |
| 36 bool HasObserver(UserActivityObserver* observer) const; | |
| 37 void AddObserver(UserActivityObserver* observer); | |
| 38 void RemoveObserver(UserActivityObserver* observer); | |
| 39 | |
| 40 // Called when displays are about to be turned on or off. | |
| 41 void OnDisplayPowerChanging(); | |
| 42 | |
| 43 // ui::EventHandler implementation. | |
| 44 virtual void OnKeyEvent(ui::KeyEvent* event) override; | |
| 45 virtual void OnMouseEvent(ui::MouseEvent* event) override; | |
| 46 virtual void OnScrollEvent(ui::ScrollEvent* event) override; | |
| 47 virtual void OnTouchEvent(ui::TouchEvent* event) override; | |
| 48 virtual void OnGestureEvent(ui::GestureEvent* event) override; | |
| 49 | |
| 50 private: | |
| 51 // Returns |now_for_test_| if set or base::TimeTicks::Now() otherwise. | |
| 52 base::TimeTicks GetCurrentTime() const; | |
| 53 | |
| 54 // Updates |last_activity_time_|. Additionally notifies observers and | |
| 55 // updates |last_observer_notification_time_| if enough time has passed | |
| 56 // since the last notification. | |
| 57 void HandleActivity(const ui::Event* event); | |
| 58 | |
| 59 ObserverList<UserActivityObserver> observers_; | |
| 60 | |
| 61 // Last time at which user activity was observed. | |
| 62 base::TimeTicks last_activity_time_; | |
| 63 | |
| 64 // Last time at which we notified observers that the user was active. | |
| 65 base::TimeTicks last_observer_notification_time_; | |
| 66 | |
| 67 // If set, used when the current time is needed. This can be set by tests to | |
| 68 // simulate the passage of time. | |
| 69 base::TimeTicks now_for_test_; | |
| 70 | |
| 71 // If set, mouse events will be ignored until this time is reached. This | |
| 72 // is to avoid reporting mouse events that occur when displays are turned | |
| 73 // on or off as user activity. | |
| 74 base::TimeTicks honor_mouse_events_time_; | |
| 75 | |
| 76 DISALLOW_COPY_AND_ASSIGN(UserActivityDetector); | |
| 77 }; | |
| 78 | |
| 79 } // namespace wm | |
| 80 | |
| 81 #endif // UI_WM_CORE_USER_ACTIVITY_DETECTOR_H_ | |
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