[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 254 matching lines @@
       const GridSizingData&) const;
   LayoutUnit assumedRowsSizeForOrthogonalChild(const LayoutBox&,
                                                SizingOperation) const;
 
   void applyStretchAlignmentToTracksIfNeeded(GridTrackSizingDirection,
                                              GridSizingData&);
 
   void paintChildren(const PaintInfo&, const LayoutPoint&) const override;
 
   LayoutUnit marginLogicalHeightForChild(const LayoutBox&) const;
+  LayoutUnit marginLogicalWidthForChild(const LayoutBox&) const;
   LayoutUnit computeMarginLogicalSizeForChild(MarginDirection,
                                               const LayoutBox&) const;
   LayoutUnit availableAlignmentSpaceForChildBeforeStretching(
       LayoutUnit gridAreaBreadthForChild,
       const LayoutBox&) const;
   StyleSelfAlignmentData justifySelfForChild(const LayoutBox&) const;
   StyleSelfAlignmentData alignSelfForChild(const LayoutBox&) const;
   void applyStretchAlignmentToChildIfNeeded(LayoutBox&);
   bool hasAutoSizeInColumnAxis(const LayoutBox& child) const {
     return isHorizontalWritingMode() ? child.styleRef().height().isAuto()
                                      : child.styleRef().width().isAuto();
   }
   bool hasAutoSizeInRowAxis(const LayoutBox& child) const {
     return isHorizontalWritingMode() ? child.styleRef().width().isAuto()
                                      : child.styleRef().height().isAuto();
   }
   bool allowedToStretchChildAlongColumnAxis(const LayoutBox& child) const {
     return alignSelfForChild(child).position() == ItemPositionStretch &&
            hasAutoSizeInColumnAxis(child) && !hasAutoMarginsInColumnAxis(child);
   }
   bool allowedToStretchChildAlongRowAxis(const LayoutBox& child) const {
     return justifySelfForChild(child).position() == ItemPositionStretch &&
            hasAutoSizeInRowAxis(child) && !hasAutoMarginsInRowAxis(child);
   }
   bool hasAutoMarginsInColumnAxis(const LayoutBox&) const;
   bool hasAutoMarginsInRowAxis(const LayoutBox&) const;
   void updateAutoMarginsInColumnAxisIfNeeded(LayoutBox&);
   void updateAutoMarginsInRowAxisIfNeeded(LayoutBox&);
+  LayoutUnit firstLineBoxBaselineForChild(const LayoutBox&) const;
+  LayoutUnit descentBaselineForChild(const LayoutBox&, LayoutUnit) const;
+  LayoutUnit updateBaselineAlignmentContextIfNeeded(LayoutBox&,
+                                                    GridSizingData&) const;
+  LayoutUnit columnAxisBaselineOffsetForChild(const LayoutBox&,
+                                              const GridSizingData&) const;
+  LayoutUnit rowAxisBaselineOffsetForChild(const LayoutBox&,
+                                           const GridSizingData&) const;
 
   int baselinePosition(
       FontBaseline,
       bool firstLine,
       LineDirectionMode,
       LinePositionMode = PositionOnContainingLine) const override;
   int firstLineBoxBaseline() const override;
   int inlineBlockBaseline(LineDirectionMode) const override;
-  bool isInlineBaselineAlignedChild(const LayoutBox* child) const;
+  bool isInlineBaselineAlignedChild(const LayoutBox& child) const;
+  bool isBlockBaselineAlignedChild(const LayoutBox& child) const;
+  bool isBaselineAlignment(const LayoutBox&) const;
 
 #if ENABLE(ASSERT)
   bool tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection,
                                          GridSizingData&) const;
 #endif
 
   LayoutUnit gridGapForDirection(GridTrackSizingDirection,
                                  SizingOperation) const;
   LayoutUnit guttersSize(GridTrackSizingDirection,
                          size_t startLine,
@@ skipping 42 matching lines @@
   std::unique_ptr<OrderedTrackIndexSet> m_autoRepeatEmptyRows{nullptr};
 
   Optional<bool> m_hasDefiniteLogicalHeight;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutGrid, isLayoutGrid());
 
 }  // namespace blink
 
 #endif  // LayoutGrid_h