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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/GridTypeAliases.h>
#include <wtf/Forward.h>
#include <wtf/Vector.h>
namespace WebCore {
namespace Layout {
enum class GridLayoutAlgorithm : uint8_t;
struct GridAutoFlowOptions;
// https://drafts.csswg.org/css-grid-1/#implicit-grids
class ImplicitGrid {
public:
ImplicitGrid(size_t explicitColumnsCount, size_t explicitRowsCount);
size_t rowsCount() const { return m_gridMatrix.size(); }
size_t columnsCount() const { return rowsCount() ? m_gridMatrix[0].size() : 0; }
void insertUnplacedGridItem(const UnplacedGridItem&);
void insertDefiniteRowItem(const UnplacedGridItem&, GridAutoFlowOptions, HashMap<unsigned, unsigned, DefaultHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>>*);
GridAreas gridAreas() const;
private:
std::optional<size_t> findFirstAvailableColumnPosition(int rowStart, int rowEnd, size_t columnSpan, size_t startSearchColumn) const;
bool isCellRangeEmpty(size_t columnStart, size_t columnEnd, int rowStart, int rowEnd) const;
void insertItemInArea(const UnplacedGridItem&, size_t columnStart, size_t columnEnd, int rowStart, int rowEnd);
GridMatrix m_gridMatrix;
};
} // namespace Layout
} // namespace WebCore
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