[css-grid] Implement repeat(auto-fit)

third_party/WebKit/Source/core/layout/LayoutGrid.h

 /*
  * 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
@@ skipping 41 matching lines @@
 public:
     explicit LayoutGrid(Element*);
     ~LayoutGrid() override;
 
     const char* name() const override { return "LayoutGrid"; }
 
     void layoutBlock(bool relayoutChildren) override;
 
     void dirtyGrid();
 
+    Vector<LayoutUnit> trackSizesForComputedStyle(GridTrackSizingDirection) const;
+
     const Vector<LayoutUnit>& columnPositions() const
     {
         ASSERT(!m_gridIsDirty);
         return m_columnPositions;
     }
 
     const Vector<LayoutUnit>& rowPositions() const
     {
         ASSERT(!m_gridIsDirty);
         return m_rowPositions;
     }
 
-    LayoutUnit guttersSize(GridTrackSizingDirection, size_t span) const;
-
-    LayoutUnit offsetBetweenTracks(GridTrackSizingDirection direction) const
-    {
-        return direction == ForColumns ? m_offsetBetweenColumns : m_offsetBetweenRows;
-    }
-
     typedef Vector<LayoutBox*, 1> GridCell;
     const GridCell& gridCell(int row, int column) const
     {
         ASSERT_WITH_SECURITY_IMPLICATION(!m_gridIsDirty);
         return m_grid[row][column];
     }
 
     const Vector<LayoutBox*>& itemsOverflowingGridArea() const
     {
         ASSERT_WITH_SECURITY_IMPLICATION(!m_gridIsDirty);
@@ skipping 33 matching lines @@
     void computeUsedBreadthOfGridTracks(GridTrackSizingDirection, GridSizingData&, LayoutUnit& baseSizesWithoutMaximization, LayoutUnit& growthLimitsWithoutMaximization) const;
     LayoutUnit computeUsedBreadthOfMinLength(const GridLength&, LayoutUnit maxBreadth) const;
     LayoutUnit computeUsedBreadthOfMaxLength(const GridLength&, LayoutUnit usedBreadth, LayoutUnit maxBreadth) const;
     void resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection, GridSizingData&) const;
 
     void ensureGridSize(size_t maximumRowSize, size_t maximumColumnSize);
     void insertItemIntoGrid(LayoutBox&, const GridArea&);
 
     size_t computeAutoRepeatTracksCount(GridTrackSizingDirection) const;
 
+    typedef ListHashSet<size_t> OrderedTrackIndexSet;
+    std::unique_ptr<OrderedTrackIndexSet> computeEmptyTracksForAutoRepeat(GridTrackSizingDirection) const;
+
+    bool hasAutoRepeatEmptyTracks(GridTrackSizingDirection) const;
+    bool isEmptyAutoRepeatTrack(GridTrackSizingDirection, size_t lineNumber) const;
+
     void placeItemsOnGrid(SizingOperation);
     void populateExplicitGridAndOrderIterator();
     std::unique_ptr<GridArea> createEmptyGridAreaAtSpecifiedPositionsOutsideGrid(const LayoutBox&, GridTrackSizingDirection, const GridSpan& specifiedPositions) const;
     void placeSpecifiedMajorAxisItemsOnGrid(const Vector<LayoutBox*>&);
     void placeAutoMajorAxisItemsOnGrid(const Vector<LayoutBox*>&);
     void placeAutoMajorAxisItemOnGrid(LayoutBox&, std::pair<size_t, size_t>& autoPlacementCursor);
     GridTrackSizingDirection autoPlacementMajorAxisDirection() const;
     GridTrackSizingDirection autoPlacementMinorAxisDirection() const;
 
     void computeIntrinsicLogicalHeight(GridSizingData&);
@@ skipping 49 matching lines @@
     void applyStretchAlignmentToChildIfNeeded(LayoutBox&);
     bool hasAutoMarginsInColumnAxis(const LayoutBox&) const;
     bool hasAutoMarginsInRowAxis(const LayoutBox&) const;
     void updateAutoMarginsInColumnAxisIfNeeded(LayoutBox&);
     void updateAutoMarginsInRowAxisIfNeeded(LayoutBox&);
 
 #if ENABLE(ASSERT)
     bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, GridSizingData&);
 #endif
 
+    LayoutUnit gridGapForDirection(GridTrackSizingDirection) const;
+    LayoutUnit guttersSize(GridTrackSizingDirection, size_t startLine, size_t span) const;
+
     size_t gridItemSpan(const LayoutBox&, GridTrackSizingDirection);
     bool spanningItemCrossesFlexibleSizedTracks(const GridSpan&, GridTrackSizingDirection, SizingOperation) const;
 
     size_t gridColumnCount() const;
     size_t gridRowCount() const;
 
     bool isOrthogonalChild(const LayoutBox&) const;
     GridTrackSizingDirection flowAwareDirectionForChild(const LayoutBox&, GridTrackSizingDirection) const;
 
     typedef Vector<Vector<GridCell>> GridRepresentation;
@@ skipping 11 matching lines @@
     LayoutUnit m_minContentHeight { -1 };
     LayoutUnit m_maxContentHeight { -1 };
 
     int m_smallestRowStart;
     int m_smallestColumnStart;
 
     size_t m_autoRepeatColumns { 0 };
     size_t m_autoRepeatRows { 0 };
 
     bool m_hasAnyOrthogonalChild;
+
+    std::unique_ptr<OrderedTrackIndexSet> m_autoRepeatEmptyColumns { nullptr };
+    std::unique_ptr<OrderedTrackIndexSet> m_autoRepeatEmptyRows { nullptr };
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutGrid, isLayoutGrid());
 
 } // namespace blink
 
 #endif // LayoutGrid_h