It is time.

ui/wm/core/user_activity_detector.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/wm/core/user_activity_detector.h"
-
-#include "base/format_macros.h"
-#include "base/logging.h"
-#include "base/strings/stringprintf.h"
-#include "ui/events/event.h"
-#include "ui/wm/core/user_activity_observer.h"
-
-namespace wm {
-
-namespace {
-
-// Returns a string describing |event|.
-std::string GetEventDebugString(const ui::Event* event) {
-  std::string details = base::StringPrintf(
-      "type=%d name=%s flags=%d time=%" PRId64,
-      event->type(), event->name().c_str(), event->flags(),
-      event->time_stamp().InMilliseconds());
-
-  if (event->IsKeyEvent()) {
-    details += base::StringPrintf(" key_code=%d",
-        static_cast<const ui::KeyEvent*>(event)->key_code());
-  } else if (event->IsMouseEvent() || event->IsTouchEvent() ||
-             event->IsGestureEvent()) {
-    details += base::StringPrintf(" location=%s",
-        static_cast<const ui::LocatedEvent*>(
-            event)->location().ToString().c_str());
-  }
-
-  return details;
-}
-
-}  // namespace
-
-const int UserActivityDetector::kNotifyIntervalMs = 200;
-
-// Too low and mouse events generated at the tail end of reconfiguration
-// will be reported as user activity and turn the screen back on; too high
-// and we'll ignore legitimate activity.
-const int UserActivityDetector::kDisplayPowerChangeIgnoreMouseMs = 1000;
-
-UserActivityDetector::UserActivityDetector() {
-}
-
-UserActivityDetector::~UserActivityDetector() {
-}
-
-bool UserActivityDetector::HasObserver(UserActivityObserver* observer) const {
-  return observers_.HasObserver(observer);
-}
-
-void UserActivityDetector::AddObserver(UserActivityObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void UserActivityDetector::RemoveObserver(UserActivityObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-void UserActivityDetector::OnDisplayPowerChanging() {
-  honor_mouse_events_time_ = GetCurrentTime() +
-      base::TimeDelta::FromMilliseconds(kDisplayPowerChangeIgnoreMouseMs);
-}
-
-void UserActivityDetector::OnKeyEvent(ui::KeyEvent* event) {
-  HandleActivity(event);
-}
-
-void UserActivityDetector::OnMouseEvent(ui::MouseEvent* event) {
-  if (event->flags() & ui::EF_IS_SYNTHESIZED)
-    return;
-  if (!honor_mouse_events_time_.is_null() &&
-      GetCurrentTime() < honor_mouse_events_time_)
-    return;
-
-  HandleActivity(event);
-}
-
-void UserActivityDetector::OnScrollEvent(ui::ScrollEvent* event) {
-  HandleActivity(event);
-}
-
-void UserActivityDetector::OnTouchEvent(ui::TouchEvent* event) {
-  HandleActivity(event);
-}
-
-void UserActivityDetector::OnGestureEvent(ui::GestureEvent* event) {
-  HandleActivity(event);
-}
-
-base::TimeTicks UserActivityDetector::GetCurrentTime() const {
-  return !now_for_test_.is_null() ? now_for_test_ : base::TimeTicks::Now();
-}
-
-void UserActivityDetector::HandleActivity(const ui::Event* event) {
-  base::TimeTicks now = GetCurrentTime();
-  last_activity_time_ = now;
-  if (last_observer_notification_time_.is_null() ||
-      (now - last_observer_notification_time_).InMillisecondsF() >=
-      kNotifyIntervalMs) {
-    if (VLOG_IS_ON(1))
-      VLOG(1) << "Reporting user activity: " << GetEventDebugString(event);
-    FOR_EACH_OBSERVER(UserActivityObserver, observers_, OnUserActivity(event));
-    last_observer_notification_time_ = now;
-  }
-}
-
-}  // namespace wm