Table cell background painting

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

 /*
  * 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, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1629 matching lines @@
 
     // FIXME: The table's direction should determine our row's direction, not the section's (see bug 96691).
     if (!style()->isLeftToRightDirection())
         cellLocation.setX(LayoutUnit(table()->columnPositions()[table()->numEffCols()] - table()->columnPositions()[table()->colToEffCol(cell->col() + cell->colSpan())] + horizontalBorderSpacing));
     else
         cellLocation.setX(LayoutUnit(table()->columnPositions()[effectiveColumn] + horizontalBorderSpacing));
 
     cell->setLogicalLocation(cellLocation);
 }
 
+LayoutRect LayoutTableSection::positionByCellSpan() const
+{
+    LayoutRect position;
+    LayoutTableRow* firstRow = this->firstRow();
+    LayoutTableRow* lastRow = this->lastRow();
+    if (firstRow && lastRow) {
+        position = firstRow->positionByCellSpan();
+        position.unite(lastRow->positionByCellSpan());
+    }
+    return position;
+}
+
+// Ideal cell is a cell that spans single row/column.
+// It is used to calculate position of colgroup/col/row
+// It is needed because actual cells can be arbitrary rectangles, or non-existent
+LayoutRect LayoutTableSection::positionOfIdealCell(unsigned row, unsigned col) const
+{
+    LayoutRect position;
+    LayoutTable * table = this->table();
+    unsigned left = table->columnPositions()[col];
+    unsigned top = m_rowPos[row];
+    unsigned right = table->columnPositions()[col+1];
+    unsigned bottom = m_rowPos[row+1];
+    left += table->hBorderSpacing();
+    return LayoutRect(LayoutPoint(left, top), LayoutSize(right - left, bottom-top));
+}
 } // namespace blink