tdf#134817 XLSX export: fix partially lost header/footer

When header/footer text contain text portions with different
font setting, only the last text portion was exported.

Co-authored-by: Tibor Nagy (NISZ)

Change-Id: Id4cba2b9188459cdaa0ade30c2217d8f59fe6316
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/98938
Tested-by: László Németh <nemeth@numbertext.org>
Reviewed-by: László Németh <nemeth@numbertext.org>
diff --git a/sc/qa/unit/data/xlsx/tdf134817_HeaderFooterTextWith2Section.xlsx b/sc/qa/unit/data/xlsx/tdf134817_HeaderFooterTextWith2Section.xlsx
new file mode 100644
index 0000000..224ac8d
--- /dev/null
+++ b/sc/qa/unit/data/xlsx/tdf134817_HeaderFooterTextWith2Section.xlsx
Binary files differ
diff --git a/sc/qa/unit/subsequent_export-test.cxx b/sc/qa/unit/subsequent_export-test.cxx
index 6a40b53..ae42341 100644
--- a/sc/qa/unit/subsequent_export-test.cxx
+++ b/sc/qa/unit/subsequent_export-test.cxx
@@ -252,6 +252,7 @@ public:
    void testTdf122331();
    void testTdf83779();
    void testTdf134459_HeaderFooterColorXLSX();
    void testTdf134817_HeaderFooterTextWith2SectionXLSX();

    CPPUNIT_TEST_SUITE(ScExportTest);
    CPPUNIT_TEST(test);
@@ -402,6 +403,7 @@ public:
    CPPUNIT_TEST(testTdf122331);
    CPPUNIT_TEST(testTdf83779);
    CPPUNIT_TEST(testTdf134459_HeaderFooterColorXLSX);
    CPPUNIT_TEST(testTdf134817_HeaderFooterTextWith2SectionXLSX);

    CPPUNIT_TEST_SUITE_END();

@@ -5141,6 +5143,24 @@ void ScExportTest::testTdf134459_HeaderFooterColorXLSX()
    xDocSh->DoClose();
}

void ScExportTest::testTdf134817_HeaderFooterTextWith2SectionXLSX()
{
    // Header/footer text with multiple selection should be exported, and imported properly
    ScDocShellRef xShell = loadDoc("tdf134817_HeaderFooterTextWith2Section.", FORMAT_XLSX);
    CPPUNIT_ASSERT(xShell.is());

    ScDocShellRef xDocSh = saveAndReload(&(*xShell), FORMAT_XLSX);
    CPPUNIT_ASSERT(xDocSh.is());

    xmlDocUniquePtr pDoc = XPathHelper::parseExport2(*this, *xDocSh, m_xSFactory, "xl/worksheets/sheet1.xml", FORMAT_XLSX);
    CPPUNIT_ASSERT(pDoc);

    assertXPathContent(pDoc, "/x:worksheet/x:headerFooter/x:oddHeader", "&L&\"Abadi,Regular\"&11aaa&\"Bembo,Regular\"&20bbb");
    assertXPathContent(pDoc, "/x:worksheet/x:headerFooter/x:oddFooter", "&R&\"Cambria,Regular\"&14camb&\"Dante,Regular\"&18dant");

    xDocSh->DoClose();
}

CPPUNIT_TEST_SUITE_REGISTRATION(ScExportTest);

CPPUNIT_PLUGIN_IMPLEMENT();
diff --git a/sc/source/filter/excel/xehelper.cxx b/sc/source/filter/excel/xehelper.cxx
index b9df7b4..9bb3d90 100644
--- a/sc/source/filter/excel/xehelper.cxx
+++ b/sc/source/filter/excel/xehelper.cxx
@@ -739,7 +739,7 @@ void XclExpHFConverter::AppendPortion( const EditTextObject* pTextObj, sal_Unico
                                 (aFontData.mbItalic != aNewData.mbItalic);
                if( bNewFont || (bNewStyle && pFontList) )
                {
                    aParaText = "&\"" + aNewData.maName;
                    aParaText.append("&\"").append(aNewData.maName);
                    if( pFontList )
                    {
                        FontMetric aFontMetric( pFontList->Get(