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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/page_load_metrics/observers/preview_page_load_metrics_observer.h"
#include "base/metrics/histogram_functions.h"
#include "build/build_config.h"
#include "components/page_load_metrics/browser/page_load_metrics_observer_delegate.h"
#include "components/page_load_metrics/browser/page_load_metrics_util.h"
#include "content/public/browser/navigation_handle.h"
#if !BUILDFLAG(IS_ANDROID)
#include "chrome/browser/preloading/preview/preview_manager.h"
#endif
PreviewPageLoadMetricsObserver::ObservePolicy
PreviewPageLoadMetricsObserver::OnStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url,
bool started_in_foreground) {
if (started_in_foreground) {
last_time_shown_ = navigation_handle->NavigationStart();
}
currently_in_foreground_ = started_in_foreground;
CheckPageTransitionType(navigation_handle);
return CONTINUE_OBSERVING;
}
page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PreviewPageLoadMetricsObserver::OnFencedFramesStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) {
// Track only outermost pages.
return STOP_OBSERVING;
}
page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PreviewPageLoadMetricsObserver::OnPrerenderStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) {
CheckPageTransitionType(navigation_handle);
return CONTINUE_OBSERVING;
}
page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PreviewPageLoadMetricsObserver::OnPreviewStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) {
status_ = Status::kPreviewed;
return CONTINUE_OBSERVING;
}
PreviewPageLoadMetricsObserver::ObservePolicy
PreviewPageLoadMetricsObserver::FlushMetricsOnAppEnterBackground(
const page_load_metrics::mojom::PageLoadTiming& timing) {
RecordMetrics();
return STOP_OBSERVING;
}
PreviewPageLoadMetricsObserver::ObservePolicy
PreviewPageLoadMetricsObserver::OnHidden(
const page_load_metrics::mojom::PageLoadTiming& timing) {
if (currently_in_foreground_ && !last_time_shown_.is_null()) {
total_foreground_duration_ += base::TimeTicks::Now() - last_time_shown_;
}
currently_in_foreground_ = false;
return CONTINUE_OBSERVING;
}
PreviewPageLoadMetricsObserver::ObservePolicy
PreviewPageLoadMetricsObserver::OnShown() {
currently_in_foreground_ = true;
last_time_shown_ = base::TimeTicks::Now();
return CONTINUE_OBSERVING;
}
void PreviewPageLoadMetricsObserver::OnComplete(
const page_load_metrics::mojom::PageLoadTiming& timing) {
RecordMetrics();
}
void PreviewPageLoadMetricsObserver::DidActivatePreviewedPage(
base::TimeTicks activation_time) {
status_ = Status::kPromoted;
}
PreviewPageLoadMetricsObserver::PageVisitType
PreviewPageLoadMetricsObserver::RecordPageVisitType() {
CHECK_EQ(status_, Status::kNotPreviewed);
PageVisitType type;
const page_load_metrics::PageLoadMetricsObserverDelegate& delegate =
GetDelegate();
if (is_history_navigation_) {
type = PageVisitType::kHistoryVisit;
} else if (delegate.IsOriginVisit()) {
if (is_first_navigation_) {
// PageTransition::PAGE_TRANSITION_FIRST is set only for the first
// navigation that is not triggered by any UI. So, this means the visit
// is made via the open-in-new-tab feature.
// PageTransition::PAGE_TRANSITION_LINK would not be set for the case.
type = delegate.IsTerminalVisit() ? PageVisitType::kIndependentLinkVisit
: PageVisitType::kOriginLinkVisit;
} else {
type = delegate.IsTerminalVisit() ? PageVisitType::kIndependentUIVisit
: PageVisitType::kOriginUIVisit;
}
} else {
type = delegate.IsTerminalVisit() ? PageVisitType::kTerminalVisit
: PageVisitType::kPassingVisit;
}
base::UmaHistogramEnumeration("PageLoad.Experimental.PageVisitType2", type);
return type;
}
void PreviewPageLoadMetricsObserver::RecordMetrics() {
if (status_ != Status::kNotPreviewed) {
base::UmaHistogramEnumeration("PageLoad.Experimental.PreviewFinalStatus",
ConvertStatusToPreviewFinalStatus(status_));
return;
}
CHECK_EQ(status_, Status::kNotPreviewed);
PageVisitType page_visit_type = RecordPageVisitType();
if (currently_in_foreground_ && !last_time_shown_.is_null()) {
total_foreground_duration_ += base::TimeTicks::Now() - last_time_shown_;
}
PAGE_LOAD_LONG_HISTOGRAM(
"PageLoad.Experimental.TotalForegroundDuration.AllVisit",
total_foreground_duration_);
switch (page_visit_type) {
case PageVisitType::kObsoleteIndependentVisit:
case PageVisitType::kObsoleteOriginVisit:
NOTREACHED();
case PageVisitType::kPassingVisit:
PAGE_LOAD_LONG_HISTOGRAM(
"PageLoad.Experimental.TotalForegroundDuration.PassingVisit",
total_foreground_duration_);
break;
case PageVisitType::kTerminalVisit:
PAGE_LOAD_LONG_HISTOGRAM(
"PageLoad.Experimental.TotalForegroundDuration.TerminalVisit",
total_foreground_duration_);
break;
case PageVisitType::kHistoryVisit:
PAGE_LOAD_LONG_HISTOGRAM(
"PageLoad.Experimental.TotalForegroundDuration.HistoryVisit",
total_foreground_duration_);
break;
case PageVisitType::kIndependentLinkVisit:
PAGE_LOAD_LONG_HISTOGRAM(
"PageLoad.Experimental.TotalForegroundDuration.IndependentLinkVisit",
total_foreground_duration_);
break;
case PageVisitType::kIndependentUIVisit:
PAGE_LOAD_LONG_HISTOGRAM(
"PageLoad.Experimental.TotalForegroundDuration.IndependentUIVisit",
total_foreground_duration_);
break;
case PageVisitType::kOriginLinkVisit:
PAGE_LOAD_LONG_HISTOGRAM(
"PageLoad.Experimental.TotalForegroundDuration.OriginLinkVisit",
total_foreground_duration_);
break;
case PageVisitType::kOriginUIVisit:
PAGE_LOAD_LONG_HISTOGRAM(
"PageLoad.Experimental.TotalForegroundDuration.OriginUIVisit",
total_foreground_duration_);
break;
}
#if !BUILDFLAG(IS_ANDROID)
// Note: PreviewManager is not implemented on Android yet.
// PreviewManager is created when it is used. So, `usage` should be
// `kNotUsed` if it doesn't exist.
PreviewManager::Usage usage = PreviewManager::Usage::kNotUsed;
PreviewManager* manager =
PreviewManager::FromWebContents(GetDelegate().GetWebContents());
if (manager) {
usage = manager->usage();
}
// This metric indicates if the current page initiates the LinkPreview feature
// and if the previewed page is promoted or not.
base::UmaHistogramEnumeration("PageLoad.Clients.LinkPreview.Usage", usage);
#endif
}
void PreviewPageLoadMetricsObserver::CheckPageTransitionType(
content::NavigationHandle* navigation_handle) {
is_history_navigation_ =
navigation_handle->GetPageTransition() & ui::PAGE_TRANSITION_FORWARD_BACK;
if (ui::PageTransitionCoreTypeIs(navigation_handle->GetPageTransition(),
ui::PAGE_TRANSITION_FIRST)) {
is_first_navigation_ = true;
}
}
PreviewPageLoadMetricsObserver::PreviewFinalStatus
PreviewPageLoadMetricsObserver::ConvertStatusToPreviewFinalStatus(
PreviewPageLoadMetricsObserver::Status status) {
switch (status) {
case Status::kNotPreviewed:
NOTREACHED();
case Status::kPreviewed:
return PreviewFinalStatus::kPreviewed;
case Status::kPromoted:
return PreviewFinalStatus::kPromoted;
}
NOTREACHED();
}
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