Fix table cell background painting

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

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2009, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 295 matching lines @@
     bool hasMultipleCellLevels() const { return m_hasMultipleCellLevels; }
 
     const char* name() const override { return "LayoutTableSection"; }
 
     // Whether a section has opaque background depends on many factors, e.g. border spacing,
     // border collapsing, missing cells, etc.
     // For simplicity, just conservatively assume all table sections are not opaque.
     bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect&, unsigned) const override { return false; }
     bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const override { return false; }
 
+
+    // Returns cell's position.
+    LayoutRect getCellPhysicalPosition(unsigned row, unsigned effectiveColumn) const;
+
+    // Returns table-relative position.
+    LayoutRect positionForBackgroundDrawing() const;
+
 protected:
     void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
     bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
 
 private:
     LayoutObjectChildList* virtualChildren() override { return children(); }
     const LayoutObjectChildList* virtualChildren() const override { return children(); }
 
     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectTableSection || LayoutBox::isOfType(type); }
 
@@ skipping 31 matching lines @@
     CellSpan fullTableRowSpan() const { return CellSpan(0, m_grid.size()); }
     CellSpan fullTableEffectiveColumnSpan() const { return CellSpan(0, table()->numEffectiveColumns()); }
 
     // These two functions take a rectangle as input that has been flipped by logicalRectForWritingModeAndDirection.
     // The returned span of rows or columns is end-exclusive, and empty if start==end.
     CellSpan spannedRows(const LayoutRect& flippedRect) const;
     CellSpan spannedEffectiveColumns(const LayoutRect& flippedRect) const;
 
     void setLogicalPositionForCell(LayoutTableCell*, unsigned effectiveColumn) const;
 
+    LayoutRect mapLogicalToPhysicalPosition(const LayoutRect& position) const;
+
+    // Returns cell's position without taking writing-mode or direction
+    // into account.
+    LayoutRect getCellPosition(unsigned row, unsigned effectiveColumn) const;
+
     LayoutObjectChildList m_children;
 
     // The representation of the rows and their cells (CellStruct).
     Vector<RowStruct> m_grid;
 
     // The logical offset of each row from the top of the section.
     //
     // Note that this Vector has one more entry than the number of rows so that
     // we can keep track of the final size of the section
     // (m_rowPos[m_grid.size() + 1]).
@@ skipping 40 matching lines @@
     // Invisible borders are never stored in this map.
     using CellsCollapsedBordersMap = HashMap<std::pair<const LayoutTableCell*, int>, CollapsedBorderValue>;
     CellsCollapsedBordersMap m_cellsCollapsedBorders;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTableSection, isTableSection());
 
 } // namespace blink
 
 #endif // LayoutTableSection_h