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29 #include "core/rendering/OrderIterator.h"
30 #include "core/rendering/RenderBlock.h"
31 #include "core/rendering/style/GridResolvedPosition.h"
35 struct GridCoordinate;
39 class RenderGrid FINAL : public RenderBlock {
42 virtual ~RenderGrid();
44 virtual const char* renderName() const OVERRIDE;
46 virtual void layoutBlock(bool relayoutChildren) OVERRIDE;
48 virtual bool avoidsFloats() const OVERRIDE { return true; }
49 virtual bool canCollapseAnonymousBlockChild() const OVERRIDE { return false; }
53 const Vector<LayoutUnit>& columnPositions() const { return m_columnPositions; }
54 const Vector<LayoutUnit>& rowPositions() const { return m_rowPositions; }
57 virtual bool isRenderGrid() const OVERRIDE { return true; }
58 virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
59 virtual void computePreferredLogicalWidths() OVERRIDE;
61 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE;
62 virtual void removeChild(RenderObject*) OVERRIDE;
64 virtual void styleDidChange(StyleDifference, const RenderStyle*) OVERRIDE;
66 bool explicitGridDidResize(const RenderStyle*) const;
67 bool namedGridLinesDefinitionDidChange(const RenderStyle*) const;
70 struct GridSizingData;
71 bool gridElementIsShrinkToFit();
72 void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&);
73 void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace);
74 LayoutUnit computeUsedBreadthOfMinLength(GridTrackSizingDirection, const GridLength&) const;
75 LayoutUnit computeUsedBreadthOfMaxLength(GridTrackSizingDirection, const GridLength&, LayoutUnit usedBreadth) const;
76 LayoutUnit computeUsedBreadthOfSpecifiedLength(GridTrackSizingDirection, const Length&) const;
77 void resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection, GridSizingData&, LayoutUnit& availableLogicalSpace);
79 void growGrid(GridTrackSizingDirection, size_t maximumPosition);
80 void insertItemIntoGrid(RenderBox*, const GridResolvedPosition& rowTrack, const GridResolvedPosition& columnTrack);
81 void insertItemIntoGrid(RenderBox*, const GridCoordinate&);
82 void placeItemsOnGrid();
83 void populateExplicitGridAndOrderIterator();
84 void placeSpecifiedMajorAxisItemsOnGrid(const Vector<RenderBox*>&);
85 void placeAutoMajorAxisItemsOnGrid(const Vector<RenderBox*>&);
86 void placeAutoMajorAxisItemOnGrid(RenderBox*);
87 GridTrackSizingDirection autoPlacementMajorAxisDirection() const;
88 GridTrackSizingDirection autoPlacementMinorAxisDirection() const;
90 void layoutGridItems();
91 void populateGridPositions(const GridSizingData&);
93 typedef LayoutUnit (RenderGrid::* SizingFunction)(RenderBox*, GridTrackSizingDirection, Vector<GridTrack>&);
94 typedef LayoutUnit (GridTrack::* AccumulatorGetter)() const;
95 typedef void (GridTrack::* AccumulatorGrowFunction)(LayoutUnit);
96 typedef bool (GridTrackSize::* FilterFunction)() const;
97 void resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection, GridSizingData&, RenderBox*, FilterFunction, SizingFunction, AccumulatorGetter, AccumulatorGrowFunction);
98 void distributeSpaceToTracks(Vector<GridTrack*>&, Vector<GridTrack*>* tracksForGrowthAboveMaxBreadth, AccumulatorGetter, AccumulatorGrowFunction, GridSizingData&, LayoutUnit& availableLogicalSpace);
100 double computeNormalizedFractionBreadth(Vector<GridTrack>&, const GridSpan& tracksSpan, GridTrackSizingDirection, LayoutUnit availableLogicalSpace) const;
102 const GridTrackSize& gridTrackSize(GridTrackSizingDirection, size_t) const;
104 LayoutUnit logicalHeightForChild(RenderBox*, Vector<GridTrack>&);
105 LayoutUnit minContentForChild(RenderBox*, GridTrackSizingDirection, Vector<GridTrack>& columnTracks);
106 LayoutUnit maxContentForChild(RenderBox*, GridTrackSizingDirection, Vector<GridTrack>& columnTracks);
107 LayoutUnit startOfColumnForChild(const RenderBox* child) const;
108 LayoutUnit endOfColumnForChild(const RenderBox* child) const;
109 LayoutUnit columnPositionAlignedWithGridContainerStart(const RenderBox*) const;
110 LayoutUnit columnPositionAlignedWithGridContainerEnd(const RenderBox*) const;
111 LayoutUnit centeredColumnPositionForChild(const RenderBox*) const;
112 LayoutUnit columnPositionForChild(const RenderBox*) const;
113 LayoutUnit rowPositionForChild(const RenderBox*) const;
114 LayoutPoint findChildLogicalPosition(const RenderBox*) const;
115 GridCoordinate cachedGridCoordinate(const RenderBox*) const;
117 LayoutUnit gridAreaBreadthForChild(const RenderBox* child, GridTrackSizingDirection, const Vector<GridTrack>&) const;
119 virtual void paintChildren(PaintInfo&, const LayoutPoint&) OVERRIDE;
121 bool gridIsDirty() const { return m_gridIsDirty; }
124 bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, const Vector<GridTrack>&);
127 size_t gridColumnCount() const
129 ASSERT(!gridIsDirty());
130 return m_grid[0].size();
132 size_t gridRowCount() const
134 ASSERT(!gridIsDirty());
135 return m_grid.size();
138 typedef Vector<RenderBox*, 1> GridCell;
139 typedef Vector<Vector<GridCell> > GridRepresentation;
140 GridRepresentation m_grid;
142 Vector<LayoutUnit> m_rowPositions;
143 Vector<LayoutUnit> m_columnPositions;
144 HashMap<const RenderBox*, GridCoordinate> m_gridItemCoordinate;
145 OrderIterator m_orderIterator;
146 Vector<RenderBox*> m_gridItemsOverflowingGridArea;
148 friend class GridCoordinateSorter;
151 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderGrid, isRenderGrid());
153 } // namespace WebCore
155 #endif // RenderGrid_h