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

// Copyright 2023 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_VIEW_TRANSITION_ROOT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_VIEW_TRANSITION_ROOT_H_

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

namespace blink {

class Document;
class ViewTransitionStyleTracker;

// Serves as the root of layout for a ViewTransition hierarchy. In
// spec terms, this object represents the conceptual "Snapshot
// Containing Block":
// https://drafts.csswg.org/css-view-transitions-1/#snapshot-containing-block
// This is similar to the "Initial Containing Block" for regular
// layout.
class CORE_EXPORT LayoutViewTransitionRoot : public LayoutBlockFlow { … };

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

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_VIEW_TRANSITION_ROOT_H_