[css-grid] Implementation of Baseline Self-Alignment

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 154 matching lines @@
     LayoutUnit childIntrinsicWidth(const LayoutBox&) const;
     LayoutUnit intrinsicLogicalHeightForChild(const LayoutBox&) const;
     LayoutUnit marginLogicalHeightForChild(const LayoutBox&) const;
     LayoutUnit computeMarginLogicalHeightForChild(const LayoutBox&) const;
     LayoutUnit availableAlignmentSpaceForChildBeforeStretching(LayoutUnit gridAreaBreadthForChild, const LayoutBox&) const;
     void applyStretchAlignmentToChildIfNeeded(LayoutBox&);
     bool hasAutoMarginsInColumnAxis(const LayoutBox&) const;
     bool hasAutoMarginsInRowAxis(const LayoutBox&) const;
     void updateAutoMarginsInColumnAxisIfNeeded(LayoutBox&);
     void updateAutoMarginsInRowAxisIfNeeded(LayoutBox&);
+    LayoutUnit marginBoxAscentFromBaselineForChild(const LayoutBox&) const;
+    void updateBaselineAlignmentContextInRowAxisIfNeeded(LayoutBox*, GridSizingData&) const;
+    void applyBaselineAlignmentIfNeeded(const GridSizingData&);
+
+    int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const override;
+    int firstLineBoxBaseline() const override;
+    int inlineBlockBaseline(LineDirectionMode) const override;
 
 #if ENABLE(ASSERT)
     bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection, const Vector<GridTrack>&);
 #endif
 
     size_t gridItemSpan(const LayoutBox&, GridTrackSizingDirection);
     bool spanningItemCrossesFlexibleSizedTracks(const GridCoordinate&, GridTrackSizingDirection) const;
 
     size_t gridColumnCount() const
     {
         ASSERT(!m_gridIsDirty);
         return m_grid[0].size();
     }
     size_t gridRowCount() const
     {
         ASSERT(!m_gridIsDirty);
         return m_grid.size();
     }
 
     bool hasDefiniteLogicalSize(GridTrackSizingDirection) const;
 
     typedef Vector<Vector<GridCell>> GridRepresentation;
     GridRepresentation m_grid;
     bool m_gridIsDirty;
     Vector<LayoutUnit> m_rowPositions;
     Vector<LayoutUnit> m_columnPositions;
     HashMap<const LayoutBox*, GridCoordinate> m_gridItemCoordinate;
-    OrderIterator m_orderIterator;
+    mutable OrderIterator m_orderIterator;
     Vector<LayoutBox*> m_gridItemsOverflowingGridArea;
     HashMap<const LayoutBox*, size_t> m_gridItemsIndexesMap;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutGrid, isLayoutGrid());
 
 } // namespace blink
 
 #endif // LayoutGrid_h