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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
* Copyright (C) 2013, 2014 Igalia S.L.
*
* 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. ``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
* 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.
*/
#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;
struct ContentAlignmentData;
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 styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) override;
virtual bool avoidsFloats() const override { return true; }
virtual bool canDropAnonymousBlockChild() const override { return false; }
const Vector<LayoutUnit>& columnPositions() const { return m_columnPositions; }
const Vector<LayoutUnit>& rowPositions() const { return m_rowPositions; }
LayoutUnit guttersSize(GridTrackSizingDirection, size_t span) const;
private:
virtual const char* renderName() const override;
virtual bool isRenderGrid() const override { return true; }
virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
Optional<LayoutUnit> computeIntrinsicLogicalContentHeightUsing(Length logicalHeightLength, Optional<LayoutUnit> intrinsicContentHeight, LayoutUnit borderAndPadding) const override;
class GridIterator;
class GridSizingData;
void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&, LayoutUnit& baseSizesWithoutMaximization, LayoutUnit& growthLimitsWithoutMaximization);
LayoutUnit computeUsedBreadthOfMinLength(const GridLength&, LayoutUnit maxSize) const;
LayoutUnit computeUsedBreadthOfMaxLength(const GridLength&, LayoutUnit usedBreadth, LayoutUnit maxSize) const;
void resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection, GridSizingData&);
void ensureGridSize(unsigned maximumRowSize, unsigned maximumColumnSize);
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 prepareChildForPositionedLayout(RenderBox&);
void layoutPositionedObject(RenderBox&, bool relayoutChildren, bool fixedPositionObjectsOnly) override;
void offsetAndBreadthForPositionedChild(const RenderBox&, GridTrackSizingDirection, LayoutUnit& offset, LayoutUnit& breadth);
void computeIntrinsicLogicalHeight(GridSizingData&);
LayoutUnit computeTrackBasedLogicalHeight(const GridSizingData&) const;
void computeTrackSizesForDirection(GridTrackSizingDirection, GridSizingData&, LayoutUnit freeSpace);
void layoutGridItems(GridSizingData&);
void populateGridPositions(GridSizingData&);
void clearGrid();
enum TrackSizeRestriction {
AllowInfinity,
ForbidInfinity,
};
enum TrackSizeComputationPhase {
ResolveIntrinsicMinimums,
ResolveContentBasedMinimums,
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 GridSpan&, 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);
typedef HashSet<unsigned, DefaultHash<unsigned>::Hash, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> TrackIndexSet;
double computeFlexFactorUnitSize(const Vector<GridTrack>&, GridTrackSizingDirection, double flexFactorSum, LayoutUnit leftOverSpace, const Vector<unsigned, 8>& flexibleTracksIndexes, std::unique_ptr<TrackIndexSet> tracksToTreatAsInflexible = nullptr) const;
double findFlexFactorUnitSize(const Vector<GridTrack>&, const GridSpan&, GridTrackSizingDirection, LayoutUnit spaceToFill) const;
GridTrackSize gridTrackSize(GridTrackSizingDirection, unsigned) const;
LayoutUnit logicalContentHeightForChild(RenderBox&, Vector<GridTrack>&);
LayoutUnit minSizeForChild(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>& columnTracks);
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 columnAxisOffsetForChild(const RenderBox&) const;
LayoutUnit rowAxisOffsetForChild(const RenderBox&) const;
ContentAlignmentData computeContentPositionAndDistributionOffset(GridTrackSizingDirection, const LayoutUnit& availableFreeSpace, unsigned numberOfGridTracks) const;
LayoutPoint findChildLogicalPosition(const RenderBox&) const;
GridSpan cachedGridSpan(const RenderBox&, GridTrackSizingDirection) const;
LayoutUnit gridAreaBreadthForChild(const RenderBox& child, GridTrackSizingDirection, const Vector<GridTrack>&) const;
LayoutUnit gridAreaBreadthForChildIncludingAlignmentOffsets(const RenderBox&, GridTrackSizingDirection, const GridSizingData&) const;
void applyStretchAlignmentToTracksIfNeeded(GridTrackSizingDirection, GridSizingData&);
virtual void paintChildren(PaintInfo& forSelf, const LayoutPoint& paintOffset, PaintInfo& forChild, bool usePrintRect) override;
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&);
bool hasAutoMarginsInColumnAxis(const RenderBox&) const;
bool hasAutoMarginsInRowAxis(const RenderBox&) const;
void resetAutoMarginsAndLogicalTopInColumnAxis(RenderBox& child);
void updateAutoMarginsInColumnAxisIfNeeded(RenderBox&);
void updateAutoMarginsInRowAxisIfNeeded(RenderBox&);
#ifndef NDEBUG
bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, GridSizingData&);
#endif
bool gridWasPopulated() const { return !m_grid.isEmpty() && !m_grid[0].isEmpty(); }
bool spanningItemCrossesFlexibleSizedTracks(const GridSpan&, 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;
Optional<LayoutUnit> m_minContentHeight;
Optional<LayoutUnit> m_maxContentHeight;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderGrid, isRenderGrid())
#endif /* ENABLE(CSS_GRID_LAYOUT) */
#endif // RenderGrid_h
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