chromium/third_party/blink/renderer/core/paint/timing/largest_contentful_paint_calculator.cc

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/core/paint/timing/largest_contentful_paint_calculator.h"

#include "base/check.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/renderer/core/dom/dom_node_ids.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/html/html_image_element.h"
#include "third_party/blink/renderer/core/html/loading_attribute.h"
#include "third_party/blink/renderer/core/inspector/identifiers_factory.h"
#include "third_party/blink/renderer/core/paint/timing/image_element_timing.h"
#include "third_party/blink/renderer/core/paint/timing/image_paint_timing_detector.h"
#include "third_party/blink/renderer/core/paint/timing/paint_timing.h"
#include "third_party/blink/renderer/core/paint/timing/text_paint_timing_detector.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"

namespace blink {

namespace {

constexpr const char kTraceCategories[] = …;

constexpr const char kLCPCandidate[] = …;

}  // namespace

LargestContentfulPaintType GetLargestContentfulPaintTypeFromString(
    const AtomicString& type_string) { … }

LargestContentfulPaintCalculator::LargestContentfulPaintCalculator(
    WindowPerformance* window_performance)
    : … { … }

void LargestContentfulPaintCalculator::
    UpdateWebExposedLargestContentfulPaintIfNeeded(
        const TextRecord* largest_text,
        const ImageRecord* largest_image,
        bool is_triggered_by_soft_navigation) { … }

void LargestContentfulPaintCalculator::UpdateWebExposedLargestContentfulImage(
    const ImageRecord* largest_image,
    bool is_triggered_by_soft_navigation) { … }

void LargestContentfulPaintCalculator::UpdateWebExposedLargestContentfulText(
    const TextRecord& largest_text,
    bool is_triggered_by_soft_navigation) { … }

bool LargestContentfulPaintCalculator::HasLargestImagePaintChangedForMetrics(
    base::TimeTicks largest_image_paint_time,
    uint64_t largest_image_paint_size) const { … }

bool LargestContentfulPaintCalculator::HasLargestTextPaintChangedForMetrics(
    base::TimeTicks largest_text_paint_time,
    uint64_t largest_text_paint_size) const { … }

bool LargestContentfulPaintCalculator::NotifyMetricsIfLargestImagePaintChanged(
    base::TimeTicks image_paint_time,
    uint64_t image_paint_size,
    ImageRecord* image_record,
    double image_bpp,
    std::optional<WebURLRequest::Priority> priority) { … }

bool LargestContentfulPaintCalculator::NotifyMetricsIfLargestTextPaintChanged(
    base::TimeTicks text_paint_time,
    uint64_t text_paint_size) { … }

void LargestContentfulPaintCalculator::UpdateLatestLcpDetails() { … }
void LargestContentfulPaintCalculator::Trace(Visitor* visitor) const { … }

std::unique_ptr<TracedValue>
LargestContentfulPaintCalculator::TextCandidateTraceData(
    const TextRecord& largest_text,
    bool is_triggered_by_soft_navigation) { … }

std::unique_ptr<TracedValue>
LargestContentfulPaintCalculator::ImageCandidateTraceData(
    const ImageRecord* largest_image,
    bool is_triggered_by_soft_navigation,
    Element* image_element) { … }

}  // namespace blink