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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_box_model_object.h"
namespace blink {
enum class NGBaselineAlgorithmType;
class NGBreakToken;
class NGConstraintSpace;
class NGLayoutResult;
class NGPaintFragment;
class NGPhysicalFragment;
struct NGBaseline;
struct NGInlineNodeData;
// This mixin holds code shared between LayoutNG subclasses of
// LayoutBlockFlow.
template <typename Base>
class LayoutNGMixin : public Base {
public:
explicit LayoutNGMixin(Element* element);
~LayoutNGMixin() override;
NGInlineNodeData* TakeNGInlineNodeData() override;
NGInlineNodeData* GetNGInlineNodeData() const override;
void ResetNGInlineNodeData() override;
bool HasNGInlineNodeData() const override {
return ng_inline_node_data_.get();
}
LayoutUnit FirstLineBoxBaseline() const override;
LayoutUnit InlineBlockBaseline(LineDirectionMode) const override;
void InvalidateDisplayItemClients(PaintInvalidationReason) const override;
void Paint(const PaintInfo&) const override;
bool NodeAtPoint(HitTestResult&,
const HitTestLocation& location_in_container,
const LayoutPoint& accumulated_offset,
HitTestAction) override;
PositionWithAffinity PositionForPoint(const LayoutPoint&) const override;
// 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&,
NGBreakToken*) const override;
const NGConstraintSpace* CachedConstraintSpace() const override;
void SetCachedLayoutResult(const NGConstraintSpace&,
NGBreakToken*,
scoped_refptr<NGLayoutResult>) override;
// For testing only.
scoped_refptr<NGLayoutResult> CachedLayoutResultForTesting() override;
NGPaintFragment* PaintFragment() const override {
return paint_fragment_.get();
}
void SetPaintFragment(scoped_refptr<const NGPhysicalFragment>) override;
void ClearPaintFragment() override;
protected:
bool IsOfType(LayoutObject::LayoutObjectType) const override;
void AddOverflowFromChildren() override;
private:
void AddScrollingOverflowFromChildren();
protected:
void AddOutlineRects(
Vector<LayoutRect>&,
const LayoutPoint& additional_offset,
LayoutObject::IncludeBlockVisualOverflowOrNot) const override;
const NGPhysicalBoxFragment* CurrentFragment() const override;
const NGBaseline* FragmentBaseline(NGBaselineAlgorithmType) const;
std::unique_ptr<NGInlineNodeData> ng_inline_node_data_;
scoped_refptr<NGLayoutResult> cached_result_;
scoped_refptr<const NGConstraintSpace> cached_constraint_space_;
std::unique_ptr<NGPaintFragment> paint_fragment_;
friend class NGBaseLayoutAlgorithmTest;
};
} // namespace blink
#endif // LayoutNGMixin_h
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