fdo#55939 fix RTF export of footnotes

Regression from d4069372.

Change-Id: I58e8d48ac3222b795f7edfd0e74ecd86ea36f380

sw/qa/extras/rtfexport/rtfexport.cxx

@@ -66,6 +66,7 @@ public:
     void testMathVerticalstacks();
     void testMathRuns();
     void testFdo53113();
+    void testFdo55939();
 
     CPPUNIT_TEST_SUITE(Test);
 #if !defined(MACOSX) && !defined(WNT)
@@ -106,6 +107,7 @@ void Test::run()
         {"math-vertical-stacks.rtf", &Test::testMathVerticalstacks},
         {"math-runs.rtf", &Test::testMathRuns},
         {"fdo53113.odt", &Test::testFdo53113},
+        {"fdo55939.odt", &Test::testFdo55939},
     };
     // Don't test the first import of these, for some reason those tests fail
     const char* aBlacklist[] = {
@@ -426,6 +428,17 @@ void Test::testFdo53113()
     CPPUNIT_ASSERT_EQUAL(sal_Int32(102), aPairs[1].Second.Value.get<sal_Int32>());
 }
 
+void Test::testFdo55939()
+{
+    // The problem was that the exported RTF was invalid.
+    uno::Reference<text::XTextRange> xParagraph(getParagraph(1));
+    getRun(xParagraph, 1, "Main text before footnote.");
+    // Why the tab has to be removed here?
+    CPPUNIT_ASSERT_EQUAL(OUString("Footnote text."),
+            getProperty< uno::Reference<text::XTextRange> >(getRun(xParagraph, 2), "Footnote")->getText()->getString().replaceAll("\t", ""));
+    getRun(xParagraph, 3, " Text after the footnote."); // However, this leading space is intentional and OK.
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(Test);
 
 CPPUNIT_PLUGIN_IMPLEMENT();

sw/source/filter/ww8/rtfattributeoutput.cxx

@@ -2331,17 +2331,20 @@ void RtfAttributeOutput::TextFootnote_Impl( const SwFmtFtn& rFootnote )
 
     /*
      * The footnote contains a whole paragraph, so we have to:
-     * 1) Reset, then later restore the contents of our run buffer.
+     * 1) Reset, then later restore the contents of our run buffer and run state.
      * 2) Buffer the output of the whole paragraph, as we do so for section headers already.
      */
     const SwNodeIndex* pIndex = rFootnote.GetTxtFtn()->GetStartNode();
     RtfStringBuffer aRun = m_aRun;
     m_aRun.clear();
+    bool bInRunOrig = m_bInRun;
+    m_bInRun = false;
     m_bBufferSectionHeaders = true;
     m_rExport.WriteSpecialText( pIndex->GetIndex() + 1,
             pIndex->GetNode().EndOfSectionIndex(),
             !rFootnote.IsEndNote() ? TXT_FTN : TXT_EDN);
     m_bBufferSectionHeaders = false;
+    m_bInRun = bInRunOrig;
     m_aRun = aRun;
     m_aRun->append(m_aSectionHeaders.makeStringAndClear());