125 lines
4.5 KiB
C++
125 lines
4.5 KiB
C++
/*
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* Copyright (C) 2017 Igalia S.L.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "GridPositionsResolver.h"
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#include "OrderIterator.h"
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#include <wtf/HashMap.h>
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#include <wtf/ListHashSet.h>
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#include <wtf/WeakPtr.h>
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namespace WebCore {
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typedef Vector<WeakPtr<RenderBox>, 1> GridCell;
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typedef Vector<Vector<GridCell>> GridAsMatrix;
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typedef ListHashSet<size_t> OrderedTrackIndexSet;
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class GridArea;
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class GridPositionsResolver;
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class RenderGrid;
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class Grid final {
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public:
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explicit Grid(RenderGrid&);
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unsigned numTracks(GridTrackSizingDirection) const;
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void ensureGridSize(unsigned maximumRowSize, unsigned maximumColumnSize);
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void insert(RenderBox&, const GridArea&);
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// Note that each in flow child of a grid container becomes a grid item. This means that
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// this method will return false for a grid container with only out of flow children.
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bool hasGridItems() const { return !m_gridItemArea.isEmpty(); }
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GridArea gridItemArea(const RenderBox& item) const;
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void setGridItemArea(const RenderBox& item, GridArea);
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GridSpan gridItemSpan(const RenderBox&, GridTrackSizingDirection) const;
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const GridCell& cell(unsigned row, unsigned column) const { return m_grid[row][column]; }
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unsigned explicitGridStart(GridTrackSizingDirection) const;
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void setExplicitGridStart(unsigned rowStart, unsigned columnStart);
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unsigned autoRepeatTracks(GridTrackSizingDirection) const;
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void setAutoRepeatTracks(unsigned autoRepeatRows, unsigned autoRepeatColumns);
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void setAutoRepeatEmptyColumns(std::unique_ptr<OrderedTrackIndexSet>);
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void setAutoRepeatEmptyRows(std::unique_ptr<OrderedTrackIndexSet>);
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unsigned autoRepeatEmptyTracksCount(GridTrackSizingDirection) const;
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bool hasAutoRepeatEmptyTracks(GridTrackSizingDirection) const;
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bool isEmptyAutoRepeatTrack(GridTrackSizingDirection, unsigned) const;
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OrderedTrackIndexSet* autoRepeatEmptyTracks(GridTrackSizingDirection) const;
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OrderIterator& orderIterator() { return m_orderIterator; }
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void setNeedsItemsPlacement(bool);
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bool needsItemsPlacement() const { return m_needsItemsPlacement; };
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private:
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friend class GridIterator;
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OrderIterator m_orderIterator;
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unsigned m_explicitColumnStart { 0 };
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unsigned m_explicitRowStart { 0 };
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unsigned m_autoRepeatColumns { 0 };
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unsigned m_autoRepeatRows { 0 };
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bool m_needsItemsPlacement { true };
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GridAsMatrix m_grid;
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HashMap<const RenderBox*, GridArea> m_gridItemArea;
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std::unique_ptr<OrderedTrackIndexSet> m_autoRepeatEmptyColumns;
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std::unique_ptr<OrderedTrackIndexSet> m_autoRepeatEmptyRows;
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};
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class GridIterator {
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WTF_MAKE_NONCOPYABLE(GridIterator);
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public:
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// |direction| is the direction that is fixed to |fixedTrackIndex| so e.g
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// GridIterator(m_grid, ForColumns, 1) will walk over the rows of the 2nd column.
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GridIterator(const Grid&, GridTrackSizingDirection, unsigned fixedTrackIndex, unsigned varyingTrackIndex = 0);
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RenderBox* nextGridItem();
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bool isEmptyAreaEnough(unsigned rowSpan, unsigned columnSpan) const;
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std::unique_ptr<GridArea> nextEmptyGridArea(unsigned fixedTrackSpan, unsigned varyingTrackSpan);
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private:
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const GridAsMatrix& m_grid;
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GridTrackSizingDirection m_direction;
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unsigned m_rowIndex;
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unsigned m_columnIndex;
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unsigned m_childIndex;
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};
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} // namespace WebCore
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