tdf#103931 DOCX import: fix lost section break

When there are multiple sections in a document, every <w:p> element
triggers a handleLastParagraphInSection() call, and that's how the
previous section is ended and the next one is started if necessary. In
case the section contains no paragraphs at all, the section was lost on
import. Fix this by also calling handleLastParagraphInSection() on
<w:sectPr> as well.

It's not a problem if there are both <w:p> and <w:sectPr> in a section
(which is the usual situation) as only the first call closes the
previous section / starts the next one.

Change-Id: I64f2c403dcb2ceca76d444ab06df3052235d2795
Reviewed-on: https://gerrit.libreoffice.org/34715
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

sw/qa/extras/ooxmlexport/ooxmlexport9.cxx

@@ -231,6 +231,14 @@ DECLARE_OOXMLEXPORT_TEST(testTdf106001, "tdf106001.docx")
     CPPUNIT_ASSERT_EQUAL( static_cast<sal_Int16>( 100 ), getProperty<sal_Int16>(getRun(getParagraph(1), 1), "CharScaleWidth" ));
 }
 
+DECLARE_OOXMLEXPORT_TEST(testTdf103931, "tdf103931.docx")
+{
+    uno::Reference<text::XTextSectionsSupplier> xTextSectionsSupplier(mxComponent, uno::UNO_QUERY);
+    uno::Reference<container::XIndexAccess> xTextSections(xTextSectionsSupplier->getTextSections(), uno::UNO_QUERY);
+    // This was 2, the last (empty) section of the document was lost on import.
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(3), xTextSections->getCount());
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

writerfilter/source/ooxml/model.xml

@@ -17822,6 +17822,7 @@
     </resource>
     <resource name="CT_SectPrBase" resource="Properties"/>
     <resource name="CT_SectPr" resource="Properties">
+      <action name="start" action="handleLastParagraphInSection"/>
       <element name="sectPrChange" tokenid="ooxml:CT_SectPr_sectPrChange"/>
       <action name="start" action="setLastParagraphInSection"/>
     </resource>