tdf#99090 docx export page-break only inside a paragraph

If a paragraph hadn't been started yet, a w:r was being written directly in
the /document/body which caused MSWord to complain about a corrupt document.

Change-Id: Ie7f629869aab0f3d2405660a033c3f23bbd6baca
Reviewed-on: https://gerrit.libreoffice.org/26771Tested-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/ooxmlexport4.cxx

@@ -965,6 +965,13 @@ DECLARE_OOXMLEXPORT_TEST(testTdf92521, "tdf92521.odt")
         assertXPath(pXmlDoc, "/w:document/w:body/w:p/w:pPr/w:sectPr", 1);
 }
 
+DECLARE_OOXMLEXPORT_TEST(testTdf99090_pgbrkAfterTable, "tdf99090_pgbrkAfterTable.docx")
+{
+    if (xmlDocPtr pXmlDoc = parseExport("word/document.xml"))
+        // There should be a regular page break that's in the middle of the document: right after the table.
+        assertXPath(pXmlDoc, "/w:document/w:body/w:p/w:r/w:br", 1);
+}
+
 DECLARE_OOXMLEXPORT_TEST(testTdf96750_landscapeFollow, "tdf96750_landscapeFollow.docx")
 {
     uno::Reference<beans::XPropertySet> xStyle(getStyles("PageStyles")->getByName("Standard"), uno::UNO_QUERY);

sw/source/filter/ww8/docxattributeoutput.cxx

@@ -1065,6 +1065,16 @@ void DocxAttributeOutput::EndParagraphProperties(const SfxItemSet& rParagraphMar
         m_nColBreakStatus = COLBRK_NONE;
     }
 
+    if ( m_bPostponedPageBreak )
+    {
+        m_pSerializer->startElementNS( XML_w, XML_r, FSEND );
+        m_pSerializer->singleElementNS( XML_w, XML_br,
+                FSNS( XML_w, XML_type ), "page", FSEND );
+        m_pSerializer->endElementNS( XML_w, XML_r );
+
+        m_bPostponedPageBreak = false;
+    }
+
     // merge the properties _before_ the run (strictly speaking, just
     // after the start of the paragraph)
     m_pSerializer->mergeTopMarks(Tag_StartParagraphProperties, sax_fastparser::MergeMarks::PREPEND);
@@ -5417,13 +5427,16 @@ void DocxAttributeOutput::SectionBreak( sal_uInt8 nC, const WW8_SepInfo* pSectio
                     m_pSectionInfo.reset( new WW8_SepInfo( *pSectionInfo ));
                 }
             }
-            else
+            else if ( m_bParagraphOpened )
             {
                 m_pSerializer->startElementNS( XML_w, XML_r, FSEND );
                 m_pSerializer->singleElementNS( XML_w, XML_br,
                         FSNS( XML_w, XML_type ), "page", FSEND );
                 m_pSerializer->endElementNS( XML_w, XML_r );
             }
+            else
+                m_bPostponedPageBreak = true;
+
             break;
         default:
             OSL_TRACE( "Unknown section break to write: %d", nC );
@@ -8456,6 +8469,7 @@ DocxAttributeOutput::DocxAttributeOutput( DocxExport &rExport, FSHelperPtr pSeri
       m_bAlternateContentChoiceOpen( false ),
       m_bPostponedProcessingFly( false ),
       m_nColBreakStatus( COLBRK_NONE ),
+      m_bPostponedPageBreak( false ),
       m_nTextFrameLevel( 0 ),
       m_closeHyperlinkInThisRun( false ),
       m_closeHyperlinkInPreviousRun( false ),

sw/source/filter/ww8/docxattributeoutput.hxx

@@ -810,6 +810,10 @@ private:
     // beginning of the next paragraph
     DocxColBreakStatus m_nColBreakStatus;
 
+    // Remember that a page break has to be opened at the
+    // beginning of the next paragraph
+    bool m_bPostponedPageBreak;
+
     std::vector<ww8::Frame> m_aFramesOfParagraph;
     sal_Int32 m_nTextFrameLevel;