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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 "components/page_load_metrics/browser/observers/zstd_page_load_metrics_observer.h"
#include <string>
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/string_util.h"
#include "base/time/time.h"
#include "components/page_load_metrics/browser/observers/core/largest_contentful_paint_handler.h"
#include "components/page_load_metrics/browser/page_load_metrics_util.h"
#include "components/page_load_metrics/common/page_load_timing.h"
#include "content/public/browser/navigation_handle.h"
using page_load_metrics::PageAbortReason;
namespace internal {
const char kHistogramZstdFirstContentfulPaint[] =
"PageLoad.Clients.Zstd.PaintTiming."
"NavigationToFirstContentfulPaint";
const char kHistogramZstdLargestContentfulPaint[] =
"PageLoad.Clients.Zstd.PaintTiming."
"NavigationToLargestContentfulPaint";
const char kHistogramZstdParseStart[] =
"PageLoad.Clients.Zstd.ParseTiming.NavigationToParseStart";
} // namespace internal
ZstdPageLoadMetricsObserver::ZstdPageLoadMetricsObserver() = default;
page_load_metrics::PageLoadMetricsObserver::ObservePolicy
ZstdPageLoadMetricsObserver::OnCommit(
content::NavigationHandle* navigation_handle) {
return page_load_metrics::IsZstdUrl(navigation_handle->GetURL())
? CONTINUE_OBSERVING
: STOP_OBSERVING;
}
page_load_metrics::PageLoadMetricsObserver::ObservePolicy
ZstdPageLoadMetricsObserver::OnPrerenderStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) {
// TODO(crbug.com/40222513): Handle Prerendering cases.
return STOP_OBSERVING;
}
page_load_metrics::PageLoadMetricsObserver::ObservePolicy
ZstdPageLoadMetricsObserver::OnFencedFramesStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) {
// This class is interested only in events that are preprocessed and
// dispatched also to the outermost page at PageLoadTracker. So, this class
// doesn't need to forward events for FencedFrames.
return STOP_OBSERVING;
}
void ZstdPageLoadMetricsObserver::OnFirstContentfulPaintInPage(
const page_load_metrics::mojom::PageLoadTiming& timing) {
if (!page_load_metrics::WasStartedInForegroundOptionalEventInForeground(
timing.paint_timing->first_contentful_paint, GetDelegate())) {
return;
}
PAGE_LOAD_HISTOGRAM(internal::kHistogramZstdFirstContentfulPaint,
timing.paint_timing->first_contentful_paint.value());
}
void ZstdPageLoadMetricsObserver::OnParseStart(
const page_load_metrics::mojom::PageLoadTiming& timing) {
if (!page_load_metrics::WasStartedInForegroundOptionalEventInForeground(
timing.parse_timing->parse_start, GetDelegate())) {
return;
}
PAGE_LOAD_HISTOGRAM(internal::kHistogramZstdParseStart,
timing.parse_timing->parse_start.value());
}
void ZstdPageLoadMetricsObserver::OnComplete(
const page_load_metrics::mojom::PageLoadTiming& timing) {
LogMetricsOnComplete();
}
page_load_metrics::PageLoadMetricsObserver::ObservePolicy
ZstdPageLoadMetricsObserver::FlushMetricsOnAppEnterBackground(
const page_load_metrics::mojom::PageLoadTiming& timing) {
LogMetricsOnComplete();
return STOP_OBSERVING;
}
void ZstdPageLoadMetricsObserver::LogMetricsOnComplete() {
const page_load_metrics::ContentfulPaintTimingInfo&
all_frames_largest_contentful_paint =
GetDelegate()
.GetLargestContentfulPaintHandler()
.MergeMainFrameAndSubframes();
if (!all_frames_largest_contentful_paint.ContainsValidTime() ||
!WasStartedInForegroundOptionalEventInForeground(
all_frames_largest_contentful_paint.Time(), GetDelegate())) {
return;
}
PAGE_LOAD_HISTOGRAM(internal::kHistogramZstdLargestContentfulPaint,
all_frames_largest_contentful_paint.Time().value());
}
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