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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef LayoutNGMixin_h
#define LayoutNGMixin_h
#include <type_traits>
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/layout/layout_block_flow.h"
#include "third_party/blink/renderer/core/layout/layout_box_model_object.h"
#include "third_party/blink/renderer/core/layout/layout_table_caption.h"
#include "third_party/blink/renderer/core/layout/layout_table_cell.h"
#include "third_party/blink/renderer/core/layout/ng/ng_constraint_space.h"
namespace blink {
enum class NGBaselineAlgorithmType;
class NGBreakToken;
class NGConstraintSpace;
class NGLayoutResult;
class NGPaintFragment;
class NGPhysicalFragment;
struct NGBaseline;
struct NGInlineNodeData;
struct NGPhysicalOffset;
// This mixin holds code shared between LayoutNG subclasses of
// LayoutBlockFlow.
template <typename Base>
class LayoutNGMixin : public Base {
public:
explicit LayoutNGMixin(Element* element);
~LayoutNGMixin() override;
bool IsLayoutNGObject() const final { return true; }
NGInlineNodeData* TakeNGInlineNodeData() final;
NGInlineNodeData* GetNGInlineNodeData() const final;
void ResetNGInlineNodeData() final;
bool HasNGInlineNodeData() const final { return ng_inline_node_data_.get(); }
LayoutUnit FirstLineBoxBaseline() const final;
LayoutUnit InlineBlockBaseline(LineDirectionMode) const final;
void InvalidateDisplayItemClients(PaintInvalidationReason) const final;
void Paint(const PaintInfo&) const final;
bool NodeAtPoint(HitTestResult&,
const HitTestLocation& location_in_container,
const LayoutPoint& accumulated_offset,
HitTestAction) final;
PositionWithAffinity PositionForPoint(const LayoutPoint&) const final;
// Returns the last layout result for this block flow with the given
// constraint space and break token, or null if it is not up-to-date or
// otherwise unavailable.
scoped_refptr<NGLayoutResult> CachedLayoutResult(
const NGConstraintSpace&,
const NGBreakToken*) const final;
void SetCachedLayoutResult(const NGConstraintSpace&,
const NGBreakToken*,
const NGLayoutResult&) final;
void ClearCachedLayoutResult() final;
// For testing only.
scoped_refptr<const NGLayoutResult> CachedLayoutResultForTesting() final;
NGPaintFragment* PaintFragment() const final { return paint_fragment_.get(); }
void SetPaintFragment(const NGBreakToken*,
scoped_refptr<const NGPhysicalFragment>,
NGPhysicalOffset) final;
void UpdatePaintFragmentFromCachedLayoutResult(
const NGBreakToken*,
scoped_refptr<const NGPhysicalFragment>,
NGPhysicalOffset) final;
protected:
bool IsOfType(LayoutObject::LayoutObjectType) const override;
void AddVisualOverflowFromChildren() final;
void AddLayoutOverflowFromChildren() final;
private:
void AddScrollingOverflowFromChildren();
void SetPaintFragment(scoped_refptr<const NGPhysicalFragment> fragment,
NGPhysicalOffset offset,
scoped_refptr<NGPaintFragment>* current);
protected:
void AddOutlineRects(Vector<LayoutRect>&,
const LayoutPoint& additional_offset,
NGOutlineType) const final;
const NGPhysicalBoxFragment* CurrentFragment() const final;
const NGBaseline* FragmentBaseline(NGBaselineAlgorithmType) const;
void DirtyLinesFromChangedChild(LayoutObject* child,
MarkingBehavior marking_behavior) final;
std::unique_ptr<NGInlineNodeData> ng_inline_node_data_;
scoped_refptr<const NGLayoutResult> cached_result_;
scoped_refptr<NGPaintFragment> paint_fragment_;
friend class NGBaseLayoutAlgorithmTest;
};
extern template class CORE_EXTERN_TEMPLATE_EXPORT
LayoutNGMixin<LayoutBlockFlow>;
extern template class CORE_EXTERN_TEMPLATE_EXPORT
LayoutNGMixin<LayoutTableCaption>;
extern template class CORE_EXTERN_TEMPLATE_EXPORT
LayoutNGMixin<LayoutTableCell>;
} // namespace blink
#endif // LayoutNGMixin_h
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