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// 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/base/user_activity/user_activity_detector.h"
#include "base/format_macros.h"
#include "base/logging.h"
#include "base/strings/stringprintf.h"
#include "ui/base/user_activity/user_activity_observer.h"
#include "ui/events/event.h"
namespace ui {
namespace {
UserActivityDetector* g_instance = nullptr;
// 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() {
CHECK(!g_instance);
g_instance = this;
}
UserActivityDetector::~UserActivityDetector() {
g_instance = nullptr;
}
// static
UserActivityDetector* UserActivityDetector::Get() {
return g_instance;
}
bool UserActivityDetector::HasObserver(
const 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 ui
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