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/*
* Copyright (C) 2011 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. ``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 COMPUTER, 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
#include "core/rendering/OrderIterator.h"
#include "core/rendering/RenderBlock.h"
#include "core/rendering/style/GridResolvedPosition.h"
namespace blink {
struct GridCoordinate;
struct GridSpan;
class GridTrack;
class GridItemWithSpan;
class RenderGrid final : public RenderBlock {
public:
RenderGrid(Element*);
virtual ~RenderGrid();
virtual const char* renderName() const override;
virtual void layoutBlock(bool relayoutChildren) override;
virtual bool canCollapseAnonymousBlockChild() const override { return false; }
void dirtyGrid();
const Vector<LayoutUnit>& columnPositions() const { return m_columnPositions; }
const Vector<LayoutUnit>& rowPositions() const { return m_rowPositions; }
typedef Vector<RenderBox*, 1> GridCell;
const GridCell& gridCell(int row, int column) { return m_grid[row][column]; }
const Vector<RenderBox*>& itemsOverflowingGridArea() { return m_gridItemsOverflowingGridArea; }
int paintIndexForGridItem(const RenderBox* renderBox) { return m_gridItemsIndexesMap.get(renderBox); }
bool gridIsDirty() const { return m_gridIsDirty; }
private:
virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRenderGrid || RenderBlock::isOfType(type); }
virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
virtual void computePreferredLogicalWidths() override;
virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) override;
void addChildToIndexesMap(RenderBox&);
virtual void removeChild(RenderObject*) override;
virtual void styleDidChange(StyleDifference, const RenderStyle*) override;
bool explicitGridDidResize(const RenderStyle*) const;
bool namedGridLinesDefinitionDidChange(const RenderStyle*) const;
class GridIterator;
struct GridSizingData;
bool gridElementIsShrinkToFit();
void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&);
void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace);
LayoutUnit computeUsedBreadthOfMinLength(GridTrackSizingDirection, const GridLength&) const;
LayoutUnit computeUsedBreadthOfMaxLength(GridTrackSizingDirection, const GridLength&, LayoutUnit usedBreadth) const;
LayoutUnit computeUsedBreadthOfSpecifiedLength(GridTrackSizingDirection, const Length&) const;
void resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace);
void ensureGridSize(size_t maximumRowIndex, size_t maximumColumnIndex);
void insertItemIntoGrid(RenderBox&, const GridCoordinate&);
void placeItemsOnGrid();
void populateExplicitGridAndOrderIterator();
PassOwnPtr<GridCoordinate> createEmptyGridAreaAtSpecifiedPositionsOutsideGrid(const RenderBox&, GridTrackSizingDirection, const GridSpan& specifiedPositions) const;
void placeSpecifiedMajorAxisItemsOnGrid(const Vector<RenderBox*>&);
void placeAutoMajorAxisItemsOnGrid(const Vector<RenderBox*>&);
void placeAutoMajorAxisItemOnGrid(RenderBox&, std::pair<size_t, size_t>& autoPlacementCursor);
GridTrackSizingDirection autoPlacementMajorAxisDirection() const;
GridTrackSizingDirection autoPlacementMinorAxisDirection() const;
void layoutGridItems();
void layoutPositionedObjects(bool relayoutChildren, PositionedLayoutBehavior = DefaultLayout);
void offsetAndBreadthForPositionedChild(const RenderBox&, GridTrackSizingDirection, bool startIsAuto, bool endIsAuto, LayoutUnit& offset, LayoutUnit& breadth);
void populateGridPositions(const GridSizingData&, LayoutUnit availableSpaceForColumns, LayoutUnit availableSpaceForRows);
typedef LayoutUnit (RenderGrid::* SizingFunction)(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>&);
typedef LayoutUnit (GridTrack::* AccumulatorGetter)() const;
typedef void (GridTrack::* AccumulatorGrowFunction)(LayoutUnit);
typedef bool (GridTrackSize::* FilterFunction)() const;
void resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection, GridSizingData&, GridItemWithSpan&, FilterFunction, SizingFunction, AccumulatorGetter, AccumulatorGrowFunction, FilterFunction growAboveMaxBreadthFilterFunction = nullptr);
void distributeSpaceToTracks(Vector<GridTrack*>&, Vector<size_t>* tracksForGrowthAboveMaxBreadth, AccumulatorGetter, AccumulatorGrowFunction, GridSizingData&, LayoutUnit& availableLogicalSpace);
double computeNormalizedFractionBreadth(Vector<GridTrack>&, const GridSpan& tracksSpan, GridTrackSizingDirection, LayoutUnit availableLogicalSpace) const;
GridTrackSize gridTrackSize(GridTrackSizingDirection, size_t) const;
LayoutUnit logicalHeightForChild(RenderBox&, Vector<GridTrack>&);
LayoutUnit minContentForChild(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>& columnTracks);
LayoutUnit maxContentForChild(RenderBox&, GridTrackSizingDirection, Vector<GridTrack>& columnTracks);
LayoutUnit startOfColumnForChild(const RenderBox& child) const;
LayoutUnit endOfColumnForChild(const RenderBox& child) const;
LayoutUnit columnPositionLeft(const RenderBox&) const;
LayoutUnit columnPositionRight(const RenderBox&) const;
LayoutUnit centeredColumnPositionForChild(const RenderBox&) const;
LayoutUnit columnPositionForChild(const RenderBox&) const;
LayoutUnit startOfRowForChild(const RenderBox& child) const;
LayoutUnit endOfRowForChild(const RenderBox& child) const;
LayoutUnit centeredRowPositionForChild(const RenderBox&) const;
LayoutUnit rowPositionForChild(const RenderBox&) const;
LayoutUnit contentPositionAndDistributionColumnOffset(LayoutUnit availableFreeSpace, ContentPosition, ContentDistributionType, unsigned numberOfItems) const;
LayoutPoint findChildLogicalPosition(const RenderBox&, LayoutSize contentAlignmentOffset) const;
GridCoordinate cachedGridCoordinate(const RenderBox&) const;
LayoutUnit gridAreaBreadthForChild(const RenderBox& child, GridTrackSizingDirection, const Vector<GridTrack>&) const;
virtual void paintChildren(const PaintInfo&, const LayoutPoint&) override;
bool allowedToStretchLogicalHeightForChild(const RenderBox& child) const;
bool needToStretchChildLogicalHeight(const RenderBox&) const;
LayoutUnit childIntrinsicHeight(const RenderBox&) const;
LayoutUnit childIntrinsicWidth(const RenderBox&) const;
LayoutUnit intrinsicLogicalHeightForChild(const RenderBox&) const;
LayoutUnit marginLogicalHeightForChild(const RenderBox&) const;
LayoutUnit availableAlignmentSpaceForChildBeforeStretching(LayoutUnit gridAreaBreadthForChild, const RenderBox&) const;
void applyStretchAlignmentToChildIfNeeded(RenderBox&, LayoutUnit gridAreaBreadthForChild);
#if ENABLE(ASSERT)
bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, const Vector<GridTrack>&);
#endif
size_t gridItemSpan(const RenderBox&, GridTrackSizingDirection);
bool spanningItemCrossesFlexibleSizedTracks(const GridCoordinate&, GridTrackSizingDirection) const;
size_t gridColumnCount() const
{
ASSERT(!gridIsDirty());
return m_grid[0].size();
}
size_t gridRowCount() const
{
ASSERT(!gridIsDirty());
return m_grid.size();
}
typedef Vector<Vector<GridCell> > GridRepresentation;
GridRepresentation m_grid;
bool m_gridIsDirty;
Vector<LayoutUnit> m_rowPositions;
Vector<LayoutUnit> m_columnPositions;
HashMap<const RenderBox*, GridCoordinate> m_gridItemCoordinate;
OrderIterator m_orderIterator;
Vector<RenderBox*> m_gridItemsOverflowingGridArea;
HashMap<const RenderBox*, size_t> m_gridItemsIndexesMap;
};
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderGrid, isRenderGrid());
} // namespace blink
#endif // RenderGrid_h
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