chromium/src/third_party/blink/renderer/core/html/shadow/details_marker_control.cc

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
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#include "third_party/blink/renderer/core/html/shadow/details_marker_control.h"

#include "third_party/blink/renderer/core/html/html_summary_element.h"
#include "third_party/blink/renderer/core/html/shadow/shadow_element_names.h"
#include "third_party/blink/renderer/core/layout/layout_details_marker.h"

namespace blink {

DetailsMarkerControl::DetailsMarkerControl(Document& document)
    : HTMLDivElement(document) {
  SetShadowPseudoId(shadow_element_names::kPseudoWebKitDetailsMarker);
}

LayoutObject* DetailsMarkerControl::CreateLayoutObject(const ComputedStyle&,
                                                       LegacyLayout) {
  UseCounter::Count(GetDocument(), WebFeature::kLegacyLayoutByDetailsMarker);
  return new LayoutDetailsMarker(this);
}

bool DetailsMarkerControl::LayoutObjectIsNeeded(
    const ComputedStyle& style) const {
  return SummaryElement()->IsMainSummary() &&
         HTMLDivElement::LayoutObjectIsNeeded(style);
}

HTMLSummaryElement* DetailsMarkerControl::SummaryElement() const {
  return To<HTMLSummaryElement>(OwnerShadowHost());
}

}  // namespace blink