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* Copyright (C) 2011 Robert Hogan <>
* 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
* 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 LayoutTableCaption_h
#define LayoutTableCaption_h
#include "core/layout/LayoutBlockFlow.h"
namespace blink {
class LayoutTable;
// LayoutTableCaption is used to represent a table caption
// (display: table-caption).
// Table captions are full block-flows, which is why they inherit from
// LayoutBlockFlow. This is the only internal table part that allows margins.
// All other elements simply ignore it to satisfy the table model.
// This class is very simple as the logic for handling the caption is done in
// LayoutTable. In particular, the placement and sizing is done in
// LayoutTable::layoutCaption. The function is called at different timing
// depending on the 'caption-side' property: "top" is laid out before table row
// groups when "bottom" ones are laid out after. This ensures that "top"
// captions are visually before the row groups and "bottom" ones are after.
// See for the
// positioning.
class LayoutTableCaption final : public LayoutBlockFlow {
explicit LayoutTableCaption(Element*);
~LayoutTableCaption() override;
LayoutUnit ContainingBlockLogicalWidthForContent() const override;
bool IsOfType(LayoutObjectType type) const override {
return type == kLayoutObjectTableCaption || LayoutBlockFlow::IsOfType(type);
void InsertedIntoTree() override;
void WillBeRemovedFromTree() override;
LayoutTable* Table() const;
DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTableCaption, IsTableCaption());
} // namespace blink
#endif // LayoutTableCaption_h