ash/wm/user_activity_detector.cc

   1 // Copyright (c) 2012 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 "ash/wm/user_activity_detector.h"
   6
   7 #include "ash/wm/property_util.h"
   8 #include "ash/wm/user_activity_observer.h"
   9 #include "ui/base/events/event.h"
  10
  11 namespace ash {
  12
  13 const int UserActivityDetector::kNotifyIntervalMs = 200;
  14
  15 // Too low and mouse events generated at the tail end of reconfiguration
  16 // will be reported as user activity and turn the screen back on; too high
  17 // and we'll ignore legitimate activity.
  18 const int UserActivityDetector::kDisplayPowerChangeIgnoreMouseMs = 1000;
  19
  20 UserActivityDetector::UserActivityDetector() {
  21 }
  22
  23 UserActivityDetector::~UserActivityDetector() {
  24 }
  25
  26 bool UserActivityDetector::HasObserver(UserActivityObserver* observer) const {
  27   return observers_.HasObserver(observer);
  28 }
  29
  30 void UserActivityDetector::AddObserver(UserActivityObserver* observer) {
  31   observers_.AddObserver(observer);
  32 }
  33
  34 void UserActivityDetector::RemoveObserver(UserActivityObserver* observer) {
  35   observers_.RemoveObserver(observer);
  36 }
  37
  38 void UserActivityDetector::OnDisplayPowerChanging() {
  39   honor_mouse_events_time_ = GetCurrentTime() +
  40       base::TimeDelta::FromMilliseconds(kDisplayPowerChangeIgnoreMouseMs);
  41 }
  42
  43 void UserActivityDetector::OnKeyEvent(ui::KeyEvent* event) {
  44   HandleActivity();
  45 }
  46
  47 void UserActivityDetector::OnMouseEvent(ui::MouseEvent* event) {
  48   if (event->flags() & ui::EF_IS_SYNTHESIZED)
  49     return;
  50   if (!honor_mouse_events_time_.is_null() &&
  51       GetCurrentTime() < honor_mouse_events_time_)
  52     return;
  53
  54   HandleActivity();
  55 }
  56
  57 void UserActivityDetector::OnScrollEvent(ui::ScrollEvent* event) {
  58   HandleActivity();
  59 }
  60
  61 void UserActivityDetector::OnTouchEvent(ui::TouchEvent* event) {
  62   HandleActivity();
  63 }
  64
  65 void UserActivityDetector::OnGestureEvent(ui::GestureEvent* event) {
  66   HandleActivity();
  67 }
  68
  69 base::TimeTicks UserActivityDetector::GetCurrentTime() const {
  70   return !now_for_test_.is_null() ? now_for_test_ : base::TimeTicks::Now();
  71 }
  72
  73 void UserActivityDetector::HandleActivity() {
  74   base::TimeTicks now = GetCurrentTime();
  75   last_activity_time_ = now;
  76   if (last_observer_notification_time_.is_null() ||
  77       (now - last_observer_notification_time_).InMillisecondsF() >=
  78       kNotifyIntervalMs) {
  79     FOR_EACH_OBSERVER(UserActivityObserver, observers_, OnUserActivity());
  80     last_observer_notification_time_ = now;
  81   }
  82 }
  83
  84 }  // namespace ash