Repeat footers in paginated context

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

Index: third_party/WebKit/Source/core/paint/TableSectionPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/TableSectionPainter.cpp b/third_party/WebKit/Source/core/paint/TableSectionPainter.cpp
index f66cc741d5c26522ae8ff130d27ed3a1c890c050..e76e47c9d8da8f6247bddfef4edf20941113533e 100644
--- a/third_party/WebKit/Source/core/paint/TableSectionPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/TableSectionPainter.cpp
@@ -37,9 +37,9 @@ void TableSectionPainter::PaintRepeatingHeaderGroup(
     header_group_offset += row->PaginationStrut();
   LayoutUnit offset_to_next_page =
       page_height - IntMod(header_group_offset, page_height);
-  // Move paginationOffset to the top of the next page.
+  // Move pagination_offset to the top of the next page.
   pagination_offset.Move(LayoutUnit(), offset_to_next_page);
-  // Now move paginationOffset to the top of the page the cull rect starts on.
+  // Now move pagination_offset to the top of the page the cull rect starts on.
   if (paint_info.GetCullRect().rect_.Y() > pagination_offset.Y()) {
     pagination_offset.Move(LayoutUnit(),
                            page_height * ((paint_info.GetCullRect().rect_.Y() -
@@ -69,15 +69,56 @@ void TableSectionPainter::PaintRepeatingHeaderGroup(
   }
 }
 
+void TableSectionPainter::PaintRepeatingFooterGroup(
+    const PaintInfo& paint_info,
+    const LayoutPoint& paint_offset,
+    const CollapsedBorderValue& current_border_value,
+    ItemToPaint item_to_paint) {
+  if (!layout_table_section_.IsRepeatingFooterGroup())
+    return;
+  LayoutTable* table = layout_table_section_.Table();
+  LayoutRect sections_rect(LayoutPoint(), table->Size());
+  // Keep the top captions as we need top_offset to be
+  // the offset from the top of table.
+  table->SubtractCaptionRect(sections_rect, LayoutTable::BottomCaptionsOnly);
+  LayoutUnit total_height_of_rows =
+      sections_rect.Height() - table->OuterBorderBottom();
+  // The footer section may be at the top of a page.
+  total_height_of_rows -= (layout_table_section_.LogicalHeight() -
+                           layout_table_section_.FirstRow()->PaginationStrut());
+  LayoutPoint top_offset = paint_offset;
+  top_offset.Move(LayoutUnit(), -total_height_of_rows);
+  IntRect cull_rect = paint_info.GetCullRect().rect_;
+  cull_rect.Move(0, -total_height_of_rows.ToInt());
+  for (unsigned page = 0; page < table->PagesWithRepeatingFooters(); page++) {
+    LayoutPoint pagination_offset = top_offset;
+    LayoutUnit footer_position =
+        table->GetPositionOfRepeatingFooterGroupOnPage(page);
+    if (!footer_position)
+      continue;
+    pagination_offset.Move(LayoutUnit(), footer_position);
+    if (item_to_paint == kPaintCollapsedBorders) {
+      PaintCollapsedSectionBorders(paint_info, pagination_offset,
+                                   current_border_value);
+    } else {
+      PaintSection(paint_info, pagination_offset);
+    }
+  }
+}
+
 void TableSectionPainter::Paint(const PaintInfo& paint_info,
                                 const LayoutPoint& paint_offset) {
   ObjectPainter(layout_table_section_)
       .CheckPaintOffset(paint_info, paint_offset);
   PaintSection(paint_info, paint_offset);
   LayoutTable* table = layout_table_section_.Table();
-  if (table->Header() == layout_table_section_)
+  if (table->Header() == layout_table_section_) {
     PaintRepeatingHeaderGroup(paint_info, paint_offset, CollapsedBorderValue(),
                               kPaintSection);
+  } else if (table->Footer() == layout_table_section_) {
+    PaintRepeatingFooterGroup(paint_info, paint_offset, CollapsedBorderValue(),
+                              kPaintSection);
+  }
 }
 
 void TableSectionPainter::PaintSection(const PaintInfo& paint_info,
@@ -132,9 +173,13 @@ void TableSectionPainter::PaintCollapsedBorders(
     const CollapsedBorderValue& current_border_value) {
   PaintCollapsedSectionBorders(paint_info, paint_offset, current_border_value);
   LayoutTable* table = layout_table_section_.Table();
-  if (table->Header() == layout_table_section_)
+  if (table->Header() == layout_table_section_) {
     PaintRepeatingHeaderGroup(paint_info, paint_offset, current_border_value,
                               kPaintCollapsedBorders);
+  } else if (table->Footer() == layout_table_section_) {
+    PaintRepeatingFooterGroup(paint_info, paint_offset, current_border_value,
+                              kPaintCollapsedBorders);
+  }
 }
 
 void TableSectionPainter::PaintCollapsedSectionBorders(