third_party/WebKit/Source/core/layout/LayoutListItem.h

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009 Apple Inc.
 *               All rights reserved.
 *
 * 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.
 *
 */

#ifndef LayoutListItem_h
#define LayoutListItem_h

#include "core/layout/LayoutBlockFlow.h"

namespace blink {

class HTMLOListElement;
class LayoutListMarker;

class LayoutListItem final : public LayoutBlockFlow {
 public:
  explicit LayoutListItem(Element*);

  int value() const {
    if (!m_isValueUpToDate)
      updateValueNow();
    return m_value;
  }
  void updateValue();

  bool hasExplicitValue() const { return m_hasExplicitValue; }
  int explicitValue() const { return m_explicitValue; }
  void setExplicitValue(int);
  void clearExplicitValue();

  void setNotInList(bool);
  bool notInList() const { return m_notInList; }

  const String& markerText() const;

  void updateListMarkerNumbers();

  static void updateItemValuesForOrderedList(const HTMLOListElement*);
  static unsigned itemCountForOrderedList(const HTMLOListElement*);

  bool isEmpty() const;

  LayoutListMarker* marker() const { return m_marker; }

  const char* name() const override { return "LayoutListItem"; }

 private:
  bool isOfType(LayoutObjectType type) const override {
    return type == LayoutObjectListItem || LayoutBlockFlow::isOfType(type);
  }

  void willBeDestroyed() override;

  void insertedIntoTree() override;
  void willBeRemovedFromTree() override;

  void paint(const PaintInfo&, const LayoutPoint&) const override;

  void subtreeDidChange() final;

  // Returns true if we re-attached and updated the location of the marker.
  bool updateMarkerLocation();

  void positionListMarker();

  void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;

  void addOverflowFromChildren() override;

  inline int calcValue() const;
  void updateValueNow() const;
  void explicitValueChanged();

  int m_explicitValue;
  LayoutListMarker* m_marker;
  mutable int m_value;

  bool m_hasExplicitValue : 1;
  mutable bool m_isValueUpToDate : 1;
  bool m_notInList : 1;
};

DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutListItem, isListItem());

}  // namespace blink

#endif  // LayoutListItem_h