Repeat footers in paginated context

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

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1133 matching lines @@
   line_box.SetIsFirstAfterPageBreak(false);
   LayoutState* layout_state = View()->GetLayoutState();
   if (!layout_state->IsPaginated())
     return;
   if (!IsPageLogicalHeightKnown())
     return;
   LayoutUnit page_logical_height = PageLogicalHeightForOffset(logical_offset);
   LayoutUnit remaining_logical_height = PageRemainingLogicalHeightForOffset(
       logical_offset, kAssociateWithLatterPage);
   int line_index = LineCount(&line_box);
+  // We need to detect if we overlap a repeating footer and if so take the

[mstensho (USE GERRIT), 2017/08/01 18:58:18]

Probably don't want this comment anymore.

+  // full remaining logical height as our strut to the next page.
   if (remaining_logical_height < line_height ||
       (ShouldBreakAtLineToAvoidWidow() &&
        LineBreakToAvoidWidow() == line_index)) {
     LayoutUnit pagination_strut =
         CalculatePaginationStrutToFitContent(logical_offset, line_height);
     LayoutUnit new_logical_offset = logical_offset + pagination_strut;
     // Moving to a different page or column may mean that its height is
     // different.
     page_logical_height = PageLogicalHeightForOffset(new_logical_offset);
     if (line_height > page_logical_height) {
@@ skipping 3582 matching lines @@
         include_block_overflows);
 }
 
 void LayoutBlockFlow::InvalidateDisplayItemClients(
     PaintInvalidationReason invalidation_reason) const {
   BlockFlowPaintInvalidator(*this).InvalidateDisplayItemClients(
       invalidation_reason);
 }
 
 }  // namespace blink