chromium/src/third_party/blink/renderer/core/layout/layout_details_marker.cc

/*
 * Copyright (C) 2010, 2011 Nokia Corporation and/or its subsidiary(-ies)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "third_party/blink/renderer/core/layout/layout_details_marker.h"

#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/html/html_details_element.h"
#include "third_party/blink/renderer/core/html/html_element.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/paint/details_marker_painter.h"

namespace blink {

LayoutDetailsMarker::LayoutDetailsMarker(Element* element)
    : LayoutBlockFlow(element) {}

LayoutDetailsMarker::Orientation LayoutDetailsMarker::GetOrientation(
    const ComputedStyle& style,
    bool is_open) {
  // TODO(layout-dev): Sideways-lr and sideways-rl are not yet supported.
  const auto mode = style.GetWritingMode();
  DCHECK(mode != WritingMode::kSidewaysRl && mode != WritingMode::kSidewaysLr);

  if (is_open) {
    if (blink::IsHorizontalWritingMode(mode))
      return kDown;
    return IsFlippedBlocksWritingMode(mode) ? kLeft : kRight;
  }
  if (blink::IsHorizontalWritingMode(mode))
    return style.IsLeftToRightDirection() ? kRight : kLeft;
  return style.IsLeftToRightDirection() ? kDown : kUp;
}

void LayoutDetailsMarker::Paint(const PaintInfo& paint_info) const {
  NOT_DESTROYED();
  DetailsMarkerPainter(*this).Paint(paint_info);
}

bool LayoutDetailsMarker::IsOpen() const {
  NOT_DESTROYED();
  for (LayoutObject* layout_object = Parent(); layout_object;
       layout_object = layout_object->Parent()) {
    const auto* node = layout_object->GetNode();
    if (!node)
      continue;

    if (auto* details = DynamicTo<HTMLDetailsElement>(node))
      return details->FastHasAttribute(html_names::kOpenAttr);

    if (IsA<HTMLInputElement>(*node))
      return true;
  }

  return false;
}

}  // namespace blink