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/*
* Copyright (C) 2025 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <WebCore/GridFormattingContext.h>
#include <WebCore/GridTypeAliases.h>
#include <WebCore/StyleGridTrackBreadth.h>
namespace WebCore {
class RenderStyle;
namespace Style {
struct GridTrackSize;
struct ZoomFactor;
};
namespace Layout {
class ImplicitGrid;
enum class PackingStrategy : bool {
Sparse,
Dense
};
enum class GridAutoFlowDirection : bool {
Row,
Column
};
struct GridAutoFlowOptions {
PackingStrategy strategy;
GridAutoFlowDirection direction;
};
struct UsedTrackSizes;
struct UsedMargins;
class GridLayout {
public:
GridLayout(const GridFormattingContext&);
std::pair<UsedTrackSizes, GridItemRects> layout(GridFormattingContext::GridLayoutConstraints, const UnplacedGridItems&);
private:
auto placeGridItems(const UnplacedGridItems&, const Vector<Style::GridTrackSize>& gridTemplateColumnsTrackSizes,
const Vector<Style::GridTrackSize>& gridTemplateRowsTrackSizes, GridAutoFlowOptions);
static TrackSizingFunctionsList trackSizingFunctions(size_t implicitGridTracksCount, const Vector<Style::GridTrackSize> gridTemplateTrackSizes);
static UsedTrackSizes performGridSizingAlgorithm(const PlacedGridItems&, const TrackSizingFunctionsList& columnTrackSizingFunctionsList, const TrackSizingFunctionsList& rowTrackSizingFunctionsList);
using UsedInlineSizes = Vector<LayoutUnit>;
using UsedBlockSizes = Vector<LayoutUnit>;
std::pair<UsedInlineSizes, UsedBlockSizes> layoutGridItems(const PlacedGridItems&, const UsedTrackSizes&) const;
static Vector<UsedMargins> computeInlineMargins(const PlacedGridItems&, const Style::ZoomFactor&);
static Vector<UsedMargins> computeBlockMargins(const PlacedGridItems&, const Style::ZoomFactor&);
using BorderBoxPositions = Vector<LayoutUnit>;
static BorderBoxPositions performInlineAxisSelfAlignment(const PlacedGridItems&, const Vector<UsedMargins>&);
static BorderBoxPositions performBlockAxisSelfAlignment(const PlacedGridItems&, const Vector<UsedMargins>&);
const GridFormattingContext& formattingContext() const { return m_gridFormattingContext.get(); }
const ElementBox& gridContainer() const;
const RenderStyle& gridContainerStyle() const;
const CheckedRef<const GridFormattingContext> m_gridFormattingContext;
};
}
}
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