tdf#108524 sw: attempt to split section frames inside table cells

Tables-in-sections were already split across multiple pages, but not
secions-in-tables. To be safe still don't allow
sections-in-tables-in-sections, so you can combine these in both orders
now, but not recursively.

To achieve this, relax two "not in table" conditions to just require
"not in a table that is already in a section", and define that in case a
section-in-table is to be split, the follow section frame should be
inserted under the follow of its cell.

With this, finally the section frame in the bugdoc is split into two,
and the second section frame is moved to the second page as expected.

Change-Id: I16ebb2d30870b145a2378d46603324ab267b0dd3
Reviewed-on: https://gerrit.libreoffice.org/38965
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>
(cherry picked from commit f991b842addddeada6dc45c4054deeca5aa7f17b)

1 files changed, 8 insertions, 0 deletions

diff --git a/sw/source/core/inc/frame.hxx b/sw/source/core/inc/frame.hxx
index df85c55ae326..37bc0c08f09c 100644
--- a/sw/source/core/inc/frame.hxx
+++ b/sw/source/core/inc/frame.hxx
@@ -42,6 +42,7 @@ class SwFootnoteFrame;
 class SwFootnoteBossFrame;
 class SwTabFrame;
 class SwRowFrame;
+class SwCellFrame;
 class SwFlowFrame;
 class SwContentFrame;
 class SfxPoolItem;
@@ -227,6 +228,7 @@ class SW_DLLPUBLIC SwFrame: public SwClient, public SfxBroadcaster
     const SwLayoutFrame* ImplGetNextLayoutLeaf( bool bFwd ) const;
 
     SwPageFrame* ImplFindPageFrame();
+    SwCellFrame* ImplFindCellFrame();
 
 protected:
     SwSortedObjs* mpDrawObjs;    // draw objects, can be 0
@@ -770,6 +772,12 @@ public:
     virtual void dumpAsXmlAttributes(xmlTextWriterPtr writer) const;
     void dumpChildrenAsXml(xmlTextWriterPtr writer) const;
     bool IsCollapse() const;
+
+    /// Find the nearest table cell frame that contains us, if any.
+    SwCellFrame* FindCellFrame()
+    {
+        return IsInTab() ? ImplFindCellFrame() : nullptr;
+    }
 };
 
 inline bool SwFrame::IsInDocBody() const