#ifndef RenderGrid_h
#define RenderGrid_h
#if ENABLE(CSS_GRID_LAYOUT)
#include "GridResolvedPosition.h"
#include "OrderIterator.h"
#include "RenderBlock.h"
namespace WebCore {
class GridCoordinate;
class GridSpan;
class GridTrack;
class GridItemWithSpan;
enum GridAxisPosition {GridAxisStart, GridAxisEnd, GridAxisCenter};
class RenderGrid final : public RenderBlock {
public:
RenderGrid(Element&, Ref<RenderStyle>&&);
virtual ~RenderGrid();
Element& element() const { return downcast<Element>(nodeForNonAnonymous()); }
virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) override;
virtual bool avoidsFloats() const override { return true; }
virtual bool canCollapseAnonymousBlockChild() const override { return false; }
const Vector<LayoutUnit>& columnPositions() const { return m_columnPositions; }
const Vector<LayoutUnit>& rowPositions() const { return m_rowPositions; }
private:
virtual const char* renderName() const override;
virtual bool isRenderGrid() const override { return true; }
virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
virtual void computePreferredLogicalWidths() override;
class GridIterator;
class GridSizingData;
void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&);
void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace);
bool gridElementIsShrinkToFit();
LayoutUnit computeUsedBreadthOfMinLength(GridTrackSizingDirection, const GridLength&) const;
LayoutUnit computeUsedBreadthOfMaxLength(GridTrackSizingDirection, const GridLength&, LayoutUnit usedBreadth) const;
LayoutUnit computeUsedBreadthOfSpecifiedLength(GridTrackSizingDirection, const Length&) const;
void resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection, GridSizingData&);
void ensureGridSize(unsigned maximumRowIndex, unsigned maximumColumnIndex);
void insertItemIntoGrid(RenderBox&, const GridCoordinate&);
void placeItemsOnGrid();
void populateExplicitGridAndOrderIterator();
std::unique_ptr<GridCoordinate> createEmptyGridAreaAtSpecifiedPositionsOutsideGrid(const RenderBox&, GridTrackSizingDirection, const GridSpan&) const;
void placeSpecifiedMajorAxisItemsOnGrid(const Vector<RenderBox*>&);
void placeAutoMajorAxisItemsOnGrid(const Vector<RenderBox*>&);
typedef std::pair<unsigned, unsigned> AutoPlacementCursor;
void placeAutoMajorAxisItemOnGrid(RenderBox&, AutoPlacementCursor&);
GridTrackSizingDirection autoPlacementMajorAxisDirection() const;
GridTrackSizingDirection autoPlacementMinorAxisDirection() const;
void layoutGridItems();
void populateGridPositions(const GridSizingData&);
void clearGrid();
enum TrackSizeRestriction {
AllowInfinity,
ForbidInfinity,
};
enum TrackSizeComputationPhase {
ResolveIntrinsicMinimums,
ResolveMaxContentMinimums,
ResolveIntrinsicMaximums,
ResolveMaxContentMaximums,
MaximizeTracks,
};
static const LayoutUnit& trackSizeForTrackSizeComputationPhase(TrackSizeComputationPhase, GridTrack&, TrackSizeRestriction);
static bool shouldProcessTrackForTrackSizeComputationPhase(TrackSizeComputationPhase, const GridTrackSize&);
static bool trackShouldGrowBeyondGrowthLimitsForTrackSizeComputationPhase(TrackSizeComputationPhase, const GridTrackSize&);
static void markAsInfinitelyGrowableForTrackSizeComputationPhase(TrackSizeComputationPhase, GridTrack&);
static void updateTrackSizeForTrackSizeComputationPhase(TrackSizeComputationPhase, GridTrack&);
LayoutUnit currentItemSizeForTrackSizeComputationPhase(TrackSizeComputationPhase, RenderBox&, GridTrackSizingDirection, Vector<GridTrack>& columnTracks);
typedef struct GridItemsSpanGroupRange GridItemsSpanGroupRange;
void resolveContentBasedTrackSizingFunctionsForNonSpanningItems(GridTrackSizingDirection, const GridCoordinate&, RenderBox& gridItem, GridTrack&, Vector<GridTrack>& columnTracks);
template <TrackSizeComputationPhase> void resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection, GridSizingData&, const GridItemsSpanGroupRange&);
template <TrackSizeComputationPhase> void distributeSpaceToTracks(Vector<GridTrack*>&, const Vector<GridTrack*>* growBeyondGrowthLimitsTracks, LayoutUnit& availableLogicalSpace);
double computeNormalizedFractionBreadth(Vector<GridTrack>&, const GridSpan& tracksSpan, GridTrackSizingDirection, LayoutUnit availableLogicalSpace) const;
GridTrackSize gridTrackSize(GridTrackSizingDirection, unsigned) const;
LayoutUnit logicalContentHeightForChild(RenderBox&, Vector<GridTrack>&);
LayoutUnit minContentForChild(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>& columnTracks);
LayoutUnit maxContentForChild(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>& columnTracks);
GridAxisPosition columnAxisPositionForChild(const RenderBox&) const;
GridAxisPosition rowAxisPositionForChild(const RenderBox&) const;
LayoutUnit rowPositionForChild(const RenderBox&) const;
LayoutUnit columnPositionForChild(const RenderBox&) const;
LayoutPoint findChildLogicalPosition(const RenderBox&) const;
GridCoordinate cachedGridCoordinate(const RenderBox&) const;
LayoutUnit gridAreaBreadthForChild(const RenderBox& child, GridTrackSizingDirection, const Vector<GridTrack>&) const;
virtual void paintChildren(PaintInfo& forSelf, const LayoutPoint& paintOffset, PaintInfo& forChild, bool usePrintRect) override;
bool allowedToStretchLogicalHeightForChild(const RenderBox&) const;
bool needToStretchChildLogicalHeight(const RenderBox&) const;
LayoutUnit marginLogicalHeightForChild(const RenderBox&) const;
LayoutUnit computeMarginLogicalHeightForChild(const RenderBox&) const;
LayoutUnit availableAlignmentSpaceForChildBeforeStretching(LayoutUnit gridAreaBreadthForChild, const RenderBox&) const;
void applyStretchAlignmentToChildIfNeeded(RenderBox&, LayoutUnit gridAreaBreadthForChild);
#ifndef NDEBUG
bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, const Vector<GridTrack>&);
#endif
bool gridWasPopulated() const { return !m_grid.isEmpty() && !m_grid[0].isEmpty(); }
bool spanningItemCrossesFlexibleSizedTracks(const GridCoordinate&, GridTrackSizingDirection) const;
unsigned gridColumnCount() const
{
ASSERT(gridWasPopulated());
return m_grid[0].size();
}
unsigned gridRowCount() const
{
ASSERT(gridWasPopulated());
return m_grid.size();
}
bool hasDefiniteLogicalSize(GridTrackSizingDirection) const;
Vector<Vector<Vector<RenderBox*, 1>>> m_grid;
Vector<LayoutUnit> m_columnPositions;
Vector<LayoutUnit> m_rowPositions;
HashMap<const RenderBox*, GridCoordinate> m_gridItemCoordinate;
OrderIterator m_orderIterator;
};
}
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderGrid, isRenderGrid())
#endif
#endif // RenderGrid_h