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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PAGE_LOAD_METRICS_GOOGLE_BROWSER_GWS_PAGE_LOAD_METRICS_OBSERVER_H_
#define COMPONENTS_PAGE_LOAD_METRICS_GOOGLE_BROWSER_GWS_PAGE_LOAD_METRICS_OBSERVER_H_
#include "components/google/core/common/google_util.h"
#include "components/page_load_metrics/browser/page_load_metrics_observer.h"
#include "content/public/browser/navigation_handle_timing.h"
namespace internal {
// Exposed for tests.
extern const char kHistogramGWSNavigationStartToFinalRequestStart[];
extern const char kHistogramGWSNavigationStartToFinalResponseStart[];
extern const char kHistogramGWSNavigationStartToFinalLoaderCallback[];
extern const char kHistogramGWSNavigationStartToFirstRequestStart[];
extern const char kHistogramGWSNavigationStartToFirstResponseStart[];
extern const char kHistogramGWSNavigationStartToFirstLoaderCallback[];
extern const char kHistogramGWSNavigationStartToOnComplete[];
extern const char kHistogramGWSConnectTimingFirstRequestDomainLookupDelay[];
extern const char kHistogramGWSConnectTimingFirstRequestConnectDelay[];
extern const char kHistogramGWSConnectTimingFirstRequestSslDelay[];
extern const char kHistogramGWSConnectTimingFinalRequestDomainLookupDelay[];
extern const char kHistogramGWSConnectTimingFinalRequestConnectDelay[];
extern const char kHistogramGWSConnectTimingFinalRequestSslDelay[];
extern const char kHistogramGWSAFTEnd[];
extern const char kHistogramGWSAFTStart[];
extern const char kHistogramGWSFirstContentfulPaint[];
extern const char kHistogramGWSLargestContentfulPaint[];
extern const char kHistogramGWSParseStart[];
extern const char kHistogramGWSConnectStart[];
extern const char kHistogramGWSDomainLookupStart[];
extern const char kHistogramGWSDomainLookupEnd[];
} // namespace internal
class GWSPageLoadMetricsObserver
: public page_load_metrics::PageLoadMetricsObserver {
public:
// The source of the navigation. Specifically keeps track of special cases
// such as the navigtation started from NewTabPage, or if the navigation
// started in the background.
//
// These values are persisted to logs. Entries should not be renumbered
// and numeric values should never be reused.
//
// LINT.IfChange(NavigationSourceType)
enum NavigationSourceType {
kUnknown,
kFromNewTabPage,
kStartedInBackground,
kStartedInBackgroundFromNewTabPage,
kFromGWSPage,
kStartedInBackgroundFromGWSPage,
kMaxValue = kStartedInBackgroundFromGWSPage,
};
// LINT.ThenChange(//tools/metrics/histograms/metadata/page/enums.xml:NavigationSourceTypeEnum)
// The state of the preconnect. Keeps track of the possible state of
// preconnect before commit.
//
// These values are persisted to logs. Entries should not be renumbered
// and numeric values should never be reused.
//
// LINT.IfChange(ConnectionReuseStatus)
enum class ConnectionReuseStatus {
kNonReuse,
kDNSReused,
kReused,
kMaxValue = kReused,
};
// LINT.ThenChange(//tools/metrics/histograms/metadata/page/enums.xml:ConnectionReuseStatus)
GWSPageLoadMetricsObserver();
GWSPageLoadMetricsObserver(const GWSPageLoadMetricsObserver&) = delete;
GWSPageLoadMetricsObserver& operator=(const GWSPageLoadMetricsObserver&) =
delete;
// page_load_metrics::PageLoadMetricsObserver implementation:
ObservePolicy OnStart(content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url,
bool started_in_foreground) override;
ObservePolicy OnCommit(content::NavigationHandle* navigation_handle) override;
ObservePolicy OnPrerenderStart(content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) override;
ObservePolicy OnFencedFramesStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) override;
ObservePolicy FlushMetricsOnAppEnterBackground(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnFirstContentfulPaintInPage(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnParseStart(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnConnectStart(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnDomainLookupStart(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnDomainLookupEnd(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnComplete(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnCustomUserTimingMarkObserved(
const std::vector<page_load_metrics::mojom::CustomUserTimingMarkPtr>&
timings) override;
// The methods below are only intended for use in testing.
void SetIsFirstNavigationForTesting(bool is_first_navigation) {
is_first_navigation_ = is_first_navigation;
}
void SetNewTabPageForTesting(bool is_new_tab_page) {
source_type_ = kFromNewTabPage;
}
private:
void LogMetricsOnComplete();
void RecordNavigationTimingHistograms();
void RecordLatencyHitograms(base::TimeTicks response_start_time);
// Records the histograms required before commit. This is to ensure that we
// are getting the metrics only for GWS navigations.
void RecordPreCommitHistograms();
// Records the histograms for possible connection reuse.
void RecordConnectionReuseHistograms();
virtual bool IsFromNewTabPage(
content::NavigationHandle* navigation_handle) = 0;
virtual bool IsBrowserStartupComplete() = 0;
virtual bool IsIncognitoProfile() const = 0;
std::string AddHistogramSuffix(const std::string& histogram_name);
content::NavigationHandleTiming navigation_handle_timing_;
bool is_first_navigation_ = false;
bool was_cached_ = false;
NavigationSourceType source_type_ = kUnknown;
std::optional<base::TimeDelta> aft_start_time_;
std::optional<base::TimeDelta> aft_end_time_;
std::optional<base::TimeDelta> body_chunk_start_time_;
std::optional<base::TimeDelta> header_chunk_start_time_;
std::optional<base::TimeDelta> header_chunk_end_time_;
int64_t navigation_id_;
};
#endif // COMPONENTS_PAGE_LOAD_METRICS_GOOGLE_BROWSER_GWS_PAGE_LOAD_METRICS_OBSERVER_H_
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