tdf#112352 ooxmlimport: ALWAYS treat 1st nextpage w/cols as cont

fix 5.4 regression from 4605bd46984125a99b0e993b71efa6edb411699f.

When there are columns, if a nextpage section doesn't contain any
other "page style" details we treat it as a continuous break,
If we don't, the column info becomes part of the style itself,
and not just a section property.

However, the very first section is troublesome - by definition it DOES
contain page style details, and so if the document starts with columns,
the default style would gain the column attribute. Usually that
results in a mess, so lets make sure that we avoid that also in
the case where headers/footers are defined.

Change-Id: I7e08a9218e4304206579ed064bc92c9604d4470e
Reviewed-on: https://gerrit.libreoffice.org/44505
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Justin Luth <justin_luth@sil.org>
Tested-by: Justin Luth <justin_luth@sil.org>
diff --git a/sw/qa/extras/ooxmlexport/data/tdf112352_nextPageColumns.docx b/sw/qa/extras/ooxmlexport/data/tdf112352_nextPageColumns.docx
new file mode 100644
index 0000000..f14681d
--- /dev/null
+++ b/sw/qa/extras/ooxmlexport/data/tdf112352_nextPageColumns.docx
Binary files differ
diff --git a/sw/qa/extras/ooxmlexport/ooxmlexport9.cxx b/sw/qa/extras/ooxmlexport/ooxmlexport9.cxx
index 41a309d..dddc7b2 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlexport9.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlexport9.cxx
@@ -441,6 +441,17 @@ DECLARE_OOXMLEXPORT_TEST(testTdf103975_notPageBreakE, "tdf103975_notPageBreakE.d
    CPPUNIT_ASSERT_EQUAL(style::BreakType_COLUMN_BEFORE, getProperty<style::BreakType>(getParagraph(2), "BreakType"));
}

DECLARE_OOXMLEXPORT_TEST(testTdf112352_nextPageColumns, "tdf112352_nextPageColumns.docx")
{
    uno::Reference<beans::XPropertySet> xTextSection = getProperty< uno::Reference<beans::XPropertySet> >(getParagraph(2), "TextSection");
    uno::Reference<text::XTextColumns> xTextColumns = getProperty< uno::Reference<text::XTextColumns> >(xTextSection, "TextColumns");
    CPPUNIT_ASSERT_EQUAL(sal_Int16(2), xTextColumns->getColumnCount());

    xTextSection = getProperty< uno::Reference<beans::XPropertySet> >(getParagraph(3), "TextSection");
    xTextColumns = getProperty< uno::Reference<text::XTextColumns> >(xTextSection, "TextColumns");
    CPPUNIT_ASSERT_EQUAL(sal_Int16(0), xTextColumns->getColumnCount());
}

DECLARE_OOXMLEXPORT_TEST(testTdf109310_endnoteStyleForMSO, "tdf109310_endnoteStyleForMSO.docx")
{
    xmlDocPtr pXmlDoc = parseExport("word/endnotes.xml");
diff --git a/writerfilter/source/dmapper/PropertyMap.cxx b/writerfilter/source/dmapper/PropertyMap.cxx
index 1cf7158..c416ba5 100644
--- a/writerfilter/source/dmapper/PropertyMap.cxx
+++ b/writerfilter/source/dmapper/PropertyMap.cxx
@@ -1170,7 +1170,7 @@ void SectionPropertyMap::CloseSectionGroup( DomainMapper_Impl& rDM_Impl )
    // Continuous sections usually create only a section, and not a new page style
    const bool bTreatAsContinuous = m_nBreakType == NS_ooxml::LN_Value_ST_SectionMark_nextPage
        && m_nColumnCount > 0
        && !HasHeader( m_bTitlePage ) && !HasFooter( m_bTitlePage )
        && (m_bIsFirstSection || (!HasHeader( m_bTitlePage ) && !HasFooter( m_bTitlePage )) )
        && (m_bIsFirstSection || m_sFollowPageStyleName.isEmpty() || (m_sFirstPageStyleName.isEmpty() && m_bTitlePage));
    if ( m_nBreakType == static_cast<sal_Int32>(NS_ooxml::LN_Value_ST_SectionMark_continuous) || bTreatAsContinuous )
    {