Implement box-shadow for table section and row

third_party/WebKit/Source/core/paint/TableSectionPainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/TableSectionPainter.h"
 
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutTableCol.h"
 #include "core/layout/LayoutTableRow.h"
 #include "core/paint/BoxClipper.h"
+#include "core/paint/BoxPainter.h"
+#include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "core/paint/ObjectPainter.h"
 #include "core/paint/PaintInfo.h"
 #include "core/paint/TableCellPainter.h"
 #include "core/paint/TableRowPainter.h"
 #include <algorithm>
 
 namespace blink {
 
 inline const LayoutTableCell* TableSectionPainter::primaryCellToPaint(unsigned row, unsigned column, const CellSpan& dirtiedRows, const CellSpan& dirtiedColumns) const
 {
@@ skipping 97 matching lines @@
 
     CellSpan dirtiedRows = m_layoutTableSection.dirtiedRows(tableAlignedRect);
     CellSpan dirtiedColumns = m_layoutTableSection.dirtiedEffectiveColumns(tableAlignedRect);
 
     if (dirtiedColumns.start() >= dirtiedColumns.end())
         return;
 
     PaintInfo paintInfoForDescendants = paintInfo.forDescendants();
 
     if (shouldPaintSelfBlockBackground(paintInfo.phase)) {
+        paintBoxShadow(paintInfo, paintOffset, Normal);
         for (unsigned r = dirtiedRows.start(); r < dirtiedRows.end(); r++) {
             for (unsigned c = dirtiedColumns.start(); c < dirtiedColumns.end(); c++) {
                 if (const LayoutTableCell* cell = primaryCellToPaint(r, c, dirtiedRows, dirtiedColumns))
                     paintBackgroundsBehindCell(*cell, paintInfoForDescendants, paintOffset);
             }
         }
+        paintBoxShadow(paintInfo, paintOffset, Inset);
     }
 
     if (paintInfo.phase == PaintPhaseSelfBlockBackgroundOnly)
         return;
 
     if (shouldPaintDescendantBlockBackgrounds(paintInfo.phase)) {
         for (unsigned r = dirtiedRows.start(); r < dirtiedRows.end(); r++) {
             const LayoutTableRow* row = m_layoutTableSection.rowLayoutObjectAt(r);
             // If a row has a layer, we'll paint row background in TableRowPainter.
-            if (!row || row->hasSelfPaintingLayer() || !row->hasBackground())
+            if (!row || row->hasSelfPaintingLayer())
                 continue;
 
             TableRowPainter rowPainter(*row);
-            for (unsigned c = dirtiedColumns.start(); c < dirtiedColumns.end(); c++) {
-                if (const LayoutTableCell* cell = primaryCellToPaint(r, c, dirtiedRows, dirtiedColumns))
-                    rowPainter.paintBackgroundBehindCell(*cell, paintInfoForDescendants, paintOffset);
+            rowPainter.paintBoxShadow(paintInfoForDescendants, paintOffset, Normal);
+            if (row->hasBackground()) {
+                for (unsigned c = dirtiedColumns.start(); c < dirtiedColumns.end(); c++) {
+                    if (const LayoutTableCell* cell = primaryCellToPaint(r, c, dirtiedRows, dirtiedColumns))
+                        rowPainter.paintBackgroundBehindCell(*cell, paintInfoForDescendants, paintOffset);
+                }
             }
+            rowPainter.paintBoxShadow(paintInfoForDescendants, paintOffset, Inset);
         }
     }
 
     const HashSet<LayoutTableCell*>& overflowingCells = m_layoutTableSection.overflowingCells();
     if (!m_layoutTableSection.hasMultipleCellLevels() && overflowingCells.isEmpty()) {
         for (unsigned r = dirtiedRows.start(); r < dirtiedRows.end(); r++) {
             const LayoutTableRow* row = m_layoutTableSection.rowLayoutObjectAt(r);
             // TODO(crbug.com/577282): This painting order is inconsistent with other outlines.
             if (row && !row->hasSelfPaintingLayer() && shouldPaintSelfOutline(paintInfoForDescendants.phase))
                 TableRowPainter(*row).paintOutline(paintInfoForDescendants, paintOffset);
@@ skipping 69 matching lines @@
 }
 
 void TableSectionPainter::paintCell(const LayoutTableCell& cell, const PaintInfo& paintInfoForCells, const LayoutPoint& paintOffset)
 {
     if (!cell.hasSelfPaintingLayer() && !cell.row()->hasSelfPaintingLayer()) {
         LayoutPoint cellPoint = m_layoutTableSection.flipForWritingModeForChild(&cell, paintOffset);
         cell.paint(paintInfoForCells, cellPoint);
     }
 }
 
+void TableSectionPainter::paintBoxShadow(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, ShadowStyle shadowStyle)
+{
+    DCHECK(shouldPaintSelfBlockBackground(paintInfo.phase));
+    if (!m_layoutTableSection.styleRef().boxShadow())
+        return;
+
+    DisplayItem::Type type = shadowStyle == Normal ? DisplayItem::TableSectionBoxShadowNormal : DisplayItem::TableSectionBoxShadowInset;
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(paintInfo.context, m_layoutTableSection, type))
+        return;
+
+    LayoutRect bounds = BoxPainter(m_layoutTableSection).boundsForDrawingRecorder(paintOffset);
+    LayoutObjectDrawingRecorder recorder(paintInfo.context, m_layoutTableSection, type, bounds);
+    BoxPainter::paintBoxShadow(paintInfo, LayoutRect(paintOffset, m_layoutTableSection.size()), m_layoutTableSection.styleRef(), shadowStyle);
+}
+
 } // namespace blink