tdf#108944 writerfilter: fix missing footnote separator

Fix regression from e79ef12b
   tdf#107033 DOCX import: fix unexpected missing footnote separator.
Initially related to tdf#68787.

If HandleMarginsHeaderFooter was called twice, then it automatically
would have disabled the separator. Clearing the HasFtn/HasFtnSep flags
also shouldn't be run when in the footnote sections.

Change-Id: I00cbd1cbc8dc86edf426f852c59c3f943e373b13
Reviewed-on: https://gerrit.libreoffice.org/40551Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

sw/qa/extras/ooxmlexport/ooxmlexport3.cxx

@@ -117,6 +117,9 @@ DECLARE_OOXMLEXPORT_TEST(testTdf92470_footnoteRestart, "tdf92470_footnoteRestart
     SwDoc* pDoc = pTextDoc->GetDocShell()->GetDoc();
     CPPUNIT_ASSERT( pDoc );
     CPPUNIT_ASSERT_EQUAL_MESSAGE( "Footnote doesn't restart every Page", FTNNUM_PAGE, pDoc->GetFootnoteInfo().eNum );
+
+    uno::Reference<beans::XPropertySet> xPageStyle(getStyles("PageStyles")->getByName("Standard"), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(25), getProperty<sal_Int32>(xPageStyle, "FootnoteLineRelativeWidth"));
 }
 
 DECLARE_OOXMLEXPORT_TEST(testCharacterBorder, "charborder.odt")

writerfilter/source/dmapper/PropertyMap.cxx

@@ -992,17 +992,13 @@ void SectionPropertyMap::HandleMarginsHeaderFooter( bool bFirstPage, DomainMappe
 
     if ( rDM_Impl.m_oBackgroundColor )
         Insert( PROP_BACK_COLOR, uno::makeAny( *rDM_Impl.m_oBackgroundColor ) );
-    if (rDM_Impl.m_bHasFtn)
+
+    // Check for missing footnote separator only in case there is at least
+    // one footnote.
+    if (rDM_Impl.m_bHasFtn && !rDM_Impl.m_bHasFtnSep)
     {
-        // Check for missing footnote separator only in case there is at least
-        // one footnote.
-        if (!rDM_Impl.m_bHasFtnSep)
-        {
-            // Set footnote line width to zero, document has no footnote separator.
-            Insert(PROP_FOOTNOTE_LINE_RELATIVE_WIDTH, uno::makeAny(sal_Int32(0)));
-            rDM_Impl.m_bHasFtn = false;
-        }
-        rDM_Impl.m_bHasFtnSep = false;
+        // Set footnote line width to zero, document has no footnote separator.
+        Insert(PROP_FOOTNOTE_LINE_RELATIVE_WIDTH, uno::makeAny(sal_Int32(0)));
     }
 
     /*** if headers/footers are available then the top/bottom margins of the
@@ -1406,6 +1402,12 @@ void SectionPropertyMap::CloseSectionGroup( DomainMapper_Impl& rDM_Impl )
     }
     rDM_Impl.SetIsLastSectionGroup( false );
     rDM_Impl.SetIsFirstParagraphInSection( true );
+
+    if ( !rDM_Impl.IsInFootOrEndnote() )
+    {
+        rDM_Impl.m_bHasFtn = false;
+        rDM_Impl.m_bHasFtnSep = false;
+    }
 }
 
 // Clear the flag that says we should take the header/footer content from