chromium/third_party/blink/renderer/core/layout/layout_multi_column_spanner_placeholder.h

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_MULTI_COLUMN_SPANNER_PLACEHOLDER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_MULTI_COLUMN_SPANNER_PLACEHOLDER_H_

#include "base/notreached.h"
#include "third_party/blink/renderer/core/layout/layout_block_flow.h"

namespace blink {

// Placeholder layoutObject for column-span:all elements. The column-span:all
// layoutObject itself is a descendant of the flow thread, but due to its
// out-of-flow nature, we need something on the outside to take care of its
// positioning and sizing. LayoutMultiColumnSpannerPlaceholder objects are
// siblings of LayoutMultiColumnSet objects, i.e. direct children of the
// multicol container.
class LayoutMultiColumnSpannerPlaceholder final : public LayoutBox { … };

template <>
struct DowncastTraits<LayoutMultiColumnSpannerPlaceholder> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_MULTI_COLUMN_SPANNER_PLACEHOLDER_H_