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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/dom_distiller/content/browser/uma_helper.h"
#include "base/metrics/histogram_functions.h"
#include "base/time/time.h"
#include "components/dom_distiller/content/browser/distillability_driver.h"
#include "content/public/browser/visibility.h"
#include "content/public/browser/web_contents.h"
namespace dom_distiller {
void UMAHelper::DistillabilityDriverTimer::Start(bool is_distilled_page) {
if (HasStarted())
DCHECK_EQ(is_distilled_page_, is_distilled_page);
is_distilled_page_ = is_distilled_page;
if (active_time_start_ != base::Time())
return;
active_time_start_ = base::Time::Now();
}
void UMAHelper::DistillabilityDriverTimer::Resume() {
DCHECK(HasStarted());
if (active_time_start_ != base::Time())
return;
active_time_start_ = base::Time::Now();
}
void UMAHelper::DistillabilityDriverTimer::Pause() {
// Return early if already paused.
if (active_time_start_ == base::Time())
return;
total_active_time_ += base::Time::Now() - active_time_start_;
active_time_start_ = base::Time();
}
void UMAHelper::DistillabilityDriverTimer::Reset() {
active_time_start_ = base::Time();
total_active_time_ = base::TimeDelta();
is_distilled_page_ = false;
}
bool UMAHelper::DistillabilityDriverTimer::HasStarted() {
return active_time_start_ != base::Time() ||
total_active_time_ != base::TimeDelta();
}
base::TimeDelta UMAHelper::DistillabilityDriverTimer::GetElapsedTime() {
// If the timer is unpaused, add in the current time too.
if (active_time_start_ != base::Time())
return total_active_time_ + (base::Time::Now() - active_time_start_);
return total_active_time_;
}
// static
void UMAHelper::RecordReaderModeEntry(ReaderModeEntryPoint entry_point) {
// Use histograms instead of user actions because order doesn't matter.
base::UmaHistogramEnumeration("DomDistiller.ReaderMode.EntryPoint",
entry_point);
}
// static
void UMAHelper::RecordReaderModeExit(ReaderModeEntryPoint exit_point) {
// Use histograms instead of user actions because order doesn't matter.
base::UmaHistogramEnumeration("DomDistiller.ReaderMode.ExitPoint",
exit_point);
}
// static
void UMAHelper::UpdateTimersOnContentsChange(
content::WebContents* web_contents,
content::WebContents* old_contents) {
if (old_contents && old_contents != web_contents) {
// Pause the timer on the the driver at the old contents.
DistillabilityDriver::CreateForWebContents(old_contents);
DistillabilityDriver* old_driver =
DistillabilityDriver::FromWebContents(old_contents);
CHECK(old_driver);
if (old_driver->GetTimer().HasStarted()) {
old_driver->GetTimer().Pause();
}
}
CHECK(web_contents);
DistillabilityDriver::CreateForWebContents(web_contents);
DistillabilityDriver* driver =
DistillabilityDriver::FromWebContents(web_contents);
CHECK(driver);
// If we were already timing the new page, pause or resume as necessary.
if (!driver->GetTimer().HasStarted())
return;
if (web_contents->GetVisibility() != content::Visibility::VISIBLE) {
// Pause any running timer if the web contents are no longer visible.
driver->GetTimer().Pause();
return;
}
// Resume the driver's timer when contents have come back into focus.
driver->GetTimer().Resume();
}
// static
void UMAHelper::StartTimerIfNeeded(content::WebContents* web_contents,
ReaderModePageType page_type) {
CHECK(web_contents);
DistillabilityDriver::CreateForWebContents(web_contents);
DistillabilityDriver* driver =
DistillabilityDriver::FromWebContents(web_contents);
CHECK(driver);
if (page_type == ReaderModePageType::kDistilled) {
// If this is a distilled page, ensure the timer is running.
driver->GetTimer().Start(/* is_distilled_page */ true);
} else if (page_type == ReaderModePageType::kDistillable) {
// If we are on a distillable page, ensure the timer is running.
driver->GetTimer().Start(false);
}
}
// static
void UMAHelper::UpdateTimersOnNavigation(content::WebContents* web_contents,
ReaderModePageType page_type) {
CHECK(web_contents);
DistillabilityDriver::CreateForWebContents(web_contents);
DistillabilityDriver* driver =
DistillabilityDriver::FromWebContents(web_contents);
CHECK(driver);
if (!driver->GetTimer().HasStarted())
return;
// Stop timing distilled pages when a user navigates away.
driver->GetTimer().Reset();
}
} // namespace dom_distiller
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