tdf#105381 ww8export: support footnote numbering per page

This is only for the benefit of MSOffice, LO already uses
Dop.rncFootnote for this, but MSO requires this section sprm.
LO import currently ignores sprmSRncFtn.

Endnotes in LO do not currently support .eNum, so we can't
support MSO's rncRstSect for sprmSRncEdn, leaving only
the default - so no use writing that out.

Change-Id: Iaff703e806d1cb62bc5990eb1cdfe323705bf7ee
Reviewed-on: https://gerrit.libreoffice.org/43622Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

sw/source/filter/ww8/attributeoutputbase.hxx

@@ -183,7 +183,7 @@ public:
     /// docx requires footnoteRef/endnoteRef tag at the beginning of each of them
     virtual bool FootnoteEndnoteRefTag() { return false; };
 
-    /// for docx footnotePr/endnotePr inside sectPr
+    /// for footnote/endnote section properties
     virtual void SectFootnoteEndnotePr() {};
 
     /// for docx w:commentReference

sw/source/filter/ww8/wrtw8sty.cxx

@@ -1317,6 +1317,18 @@ void WW8AttributeOutput::StartSection()
     m_rWW8Export.pO->clear();
 }
 
+void WW8AttributeOutput::SectFootnoteEndnotePr()
+{
+    const SwFootnoteInfo& rInfo = m_rWW8Export.m_pDoc->GetFootnoteInfo();
+    m_rWW8Export.InsUInt16( NS_sprm::sprmSRncFtn );
+    switch( rInfo.eNum )
+    {
+    case FTNNUM_PAGE:     m_rWW8Export.pO->push_back( (sal_uInt8) /*rncRstPage*/ 2 ); break;
+    case FTNNUM_CHAPTER:  m_rWW8Export.pO->push_back( (sal_uInt8) /*rncRstSect*/ 1 ); break;
+    default:              m_rWW8Export.pO->push_back( (sal_uInt8) /*rncCont*/ 0 ); break;
+    }
+}
+
 void WW8AttributeOutput::SectionFormProtection( bool bProtected )
 {
     //If the document is to be exported as protected, then if a segment

sw/source/filter/ww8/ww8attributeoutput.hxx

@@ -153,6 +153,9 @@ public:
     /// Start of the section properties.
     virtual void StartSection() override;
 
+    // footnote / endnote section properties
+    virtual void SectFootnoteEndnotePr() override;
+
     /// End of the section properties.
     ///
     /// No-op for binary filters.