Repeat footers in paginated context

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 5828 matching lines @@
   if (!flow_thread) {
     LayoutUnit page_logical_height = layout_view->PageLogicalHeight();
     LayoutUnit remaining_height =
         page_logical_height - IntMod(offset, page_logical_height);
     if (page_boundary_rule == kAssociateWithFormerPage) {
       // An offset exactly at a page boundary will act as being part of the
       // former page in question (i.e. no remaining space), rather than being
       // part of the latter (i.e. one whole page length of remaining space).
       remaining_height = IntMod(remaining_height, page_logical_height);
     }
     return remaining_height;

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

Need to subtract it here too, I guess, or it's not gonna work with printing.

   }
 
   return flow_thread->PageRemainingLogicalHeightForOffset(offset,
-                                                          page_boundary_rule);
+                                                          page_boundary_rule) -
+         View()->GetLayoutState()->HeightOffsetForTableFooters();

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

Should we DCHECK that the result isn't negative?

 }
 
 bool LayoutBox::CrossesPageBoundary(LayoutUnit offset,
                                     LayoutUnit logical_height) const {
   if (!IsPageLogicalHeightKnown())
     return false;
   return PageRemainingLogicalHeightForOffset(offset, kAssociateWithLatterPage) <
          logical_height;
 }
 
 LayoutUnit LayoutBox::CalculatePaginationStrutToFitContent(
     LayoutUnit offset,
     LayoutUnit content_logical_height) const {
   LayoutUnit strut_to_next_page =
       PageRemainingLogicalHeightForOffset(offset, kAssociateWithLatterPage);
 
+  LayoutState* layout_state = View()->GetLayoutState();
+  strut_to_next_page += layout_state->HeightOffsetForTableFooters();
   // If we're inside a cell in a row that straddles a page then avoid the
   // repeating header group if necessary. If we're a table section we're
   // already accounting for it.
   if (!IsTableSection()) {
-    LayoutState* layout_state = View()->GetLayoutState();
     strut_to_next_page += layout_state->HeightOffsetForTableHeaders();
   }
 
   LayoutUnit next_page_logical_top = offset + strut_to_next_page;
   if (PageLogicalHeightForOffset(next_page_logical_top) >=
       content_logical_height)
     return strut_to_next_page;  // Content fits just fine in the next page or
                                 // column.
 
   // Moving to the top of the next page or column doesn't result in enough space
@@ skipping 77 matching lines @@
 void LayoutBox::MutableForPainting::
     SavePreviousContentBoxSizeAndLayoutOverflowRect() {
   auto& rare_data = GetLayoutBox().EnsureRareData();
   rare_data.has_previous_content_box_size_and_layout_overflow_rect_ = true;
   rare_data.previous_content_box_size_ = GetLayoutBox().ContentBoxRect().Size();
   rare_data.previous_layout_overflow_rect_ =
       GetLayoutBox().LayoutOverflowRect();
 }
 
 }  // namespace blink