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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/screenlock_monitor/screenlock_monitor.h"
#include "base/logging.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/user_metrics.h"
#include "base/trace_event/trace_event.h"
#include "content/browser/screenlock_monitor/screenlock_monitor_source.h"
namespace content {
static ScreenlockMonitor* g_screenlock_monitor = nullptr;
ScreenlockMonitor::ScreenlockMonitor(
std::unique_ptr<ScreenlockMonitorSource> source)
: observers_(new base::ObserverListThreadSafe<ScreenlockObserver>()),
source_(std::move(source)) {
DCHECK(!g_screenlock_monitor);
g_screenlock_monitor = this;
}
ScreenlockMonitor::~ScreenlockMonitor() {
DCHECK_EQ(this, g_screenlock_monitor);
g_screenlock_monitor = nullptr;
}
// static
ScreenlockMonitor* ScreenlockMonitor::Get() {
return g_screenlock_monitor;
}
void ScreenlockMonitor::AddObserver(ScreenlockObserver* obs) {
observers_->AddObserver(obs);
}
void ScreenlockMonitor::RemoveObserver(ScreenlockObserver* obs) {
observers_->RemoveObserver(obs);
}
void ScreenlockMonitor::NotifyScreenLocked() {
TRACE_EVENT_INSTANT0("screenlock_monitor",
"ScreenlockMonitor::NotifyScreenLocked",
TRACE_EVENT_SCOPE_GLOBAL);
DVLOG(1) << "Screen Locked";
RecordAction(base::UserMetricsAction("ScreenlockMonitor_ScreenLocked"));
ReportLockUnlockDuration(/*is_locked=*/true);
observers_->Notify(FROM_HERE, &ScreenlockObserver::OnScreenLocked);
}
void ScreenlockMonitor::NotifyScreenUnlocked() {
TRACE_EVENT_INSTANT0("screenlock_monitor",
"ScreenlockMonitor::NotifyScreenUnlocked",
TRACE_EVENT_SCOPE_GLOBAL);
DVLOG(1) << "Screen Unlocked";
RecordAction(base::UserMetricsAction("ScreenlockMonitor_ScreenUnlocked"));
ReportLockUnlockDuration(/*is_locked=*/false);
observers_->Notify(FROM_HERE, &ScreenlockObserver::OnScreenUnlocked);
}
void ScreenlockMonitor::ReportLockUnlockDuration(bool is_locked) {
const base::TimeTicks now = base::TimeTicks::Now();
// If it is the first time called, just record the time and lock state.
if (last_lock_unlock_time_.is_null()) {
last_lock_unlock_time_ = now;
is_locked_ = is_locked;
return;
}
// Skip if duplicated lock state is called.
if (is_locked_ == is_locked)
return;
is_locked_ = is_locked;
// Record metrics.
if (is_locked_) {
base::UmaHistogramLongTimes("ScreenLocker.Unlocked.Duration",
now - last_lock_unlock_time_);
} else {
base::UmaHistogramLongTimes("ScreenLocker.Locked.Duration",
now - last_lock_unlock_time_);
}
last_lock_unlock_time_ = now;
}
} // namespace content
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