fix import of nested RTF_MF groups

Change-Id: Ibd4f93663d27d997c44f73e201c355a34d6452d3

sw/qa/extras/rtfexport/data/math-runs.rtf

+{\rtf1
+{\mmath
+{\*\moMath 
+{\rtlch\fcs1 \af31507 \ltrch\fcs0 \i\loch\af34\hich\af34\dbch\af31505\insrsid7024409 \{\hich\af34\dbch\af31505\loch\f34 
+{\mr\mscr0\msty2 
+[]()}
+}
+{\rtlch\fcs1 \af31507 \ltrch\fcs0 \i\f34\insrsid7024409 \}}
+}
+}
+\par
+}

sw/qa/extras/rtfexport/rtfexport.cxx

@@ -67,6 +67,7 @@ public:
     void testMathSepchr();
     void testMathSubscripts();
     void testMathVerticalstacks();
+    void testMathRuns();
 
     CPPUNIT_TEST_SUITE(Test);
 #if !defined(MACOSX) && !defined(WNT)
@@ -96,6 +97,7 @@ public:
     CPPUNIT_TEST(testMathSepchr);
     CPPUNIT_TEST(testMathSubscripts);
     CPPUNIT_TEST(testMathVerticalstacks);
+    CPPUNIT_TEST(testMathRuns);
 #endif
 #endif
     CPPUNIT_TEST_SUITE_END();
@@ -397,6 +399,13 @@ void Test::testMathVerticalstacks()
     CPPUNIT_ASSERT_EQUAL(OUString("stack { a # stack { b # c } }"), getFormula(getRun(getParagraph(4), 1)));
 }
 
+void Test::testMathRuns()
+{
+    roundtrip("math-runs.rtf");
+    // was [](){}, i.e. first curly bracket had an incorrect position
+    CPPUNIT_ASSERT_EQUAL(OUString("\\{ left [ right ] left ( right ) \\}"), getFormula(getRun(getParagraph(1), 1)));
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(Test);
 
 CPPUNIT_PLUGIN_IMPLEMENT();

writerfilter/source/rtftok/rtfdocumentimpl.cxx

@@ -202,6 +202,19 @@ static util::DateTime lcl_getDateTime(std::stack<RTFParserState>& aStates)
             aStates.top().nDay, aStates.top().nMonth, aStates.top().nYear);
 }
 
+static void lcl_DestinationToMath(OUStringBuffer& rDestinationText, oox::formulaimport::XmlStreamBuilder& rMathBuffer)
+{
+    OUString aStr = rDestinationText.makeStringAndClear();
+    if (!aStr.isEmpty())
+    {
+        rMathBuffer.appendOpeningTag(M_TOKEN(r));
+        rMathBuffer.appendOpeningTag(M_TOKEN(t));
+        rMathBuffer.appendCharacters(aStr);
+        rMathBuffer.appendClosingTag(M_TOKEN(t));
+        rMathBuffer.appendClosingTag(M_TOKEN(r));
+    }
+}
+
 RTFDocumentImpl::RTFDocumentImpl(uno::Reference<uno::XComponentContext> const& xContext,
         uno::Reference<io::XInputStream> const& xInputStream,
         uno::Reference<lang::XComponent> const& xDstDoc,
@@ -3131,7 +3144,11 @@ int RTFDocumentImpl::pushState()
     if (m_aStates.empty())
         aState = m_aDefaultState;
     else
+    {
+        if (m_aStates.top().nDestinationState == DESTINATION_MR)
+            lcl_DestinationToMath(m_aStates.top().aDestinationText, m_aMathBuffer);
         aState = m_aStates.top();
+    }
     m_aStates.push(aState);
     m_aStates.top().aDestinationText.setLength(0);
 
@@ -3616,19 +3633,7 @@ int RTFDocumentImpl::popState()
         m_aMathBuffer = oox::formulaimport::XmlStreamBuilder();
     }
     break;
-    case DESTINATION_MR:
-    {
-        OUString aStr = m_aStates.top().aDestinationText.makeStringAndClear();
-        if (!aStr.isEmpty())
-        {
-            m_aMathBuffer.appendOpeningTag(M_TOKEN(r));
-            m_aMathBuffer.appendOpeningTag(M_TOKEN(t));
-            m_aMathBuffer.appendCharacters(aStr);
-            m_aMathBuffer.appendClosingTag(M_TOKEN(t));
-            m_aMathBuffer.appendClosingTag(M_TOKEN(r));
-        }
-    }
-    break;
+    case DESTINATION_MR: lcl_DestinationToMath(m_aStates.top().aDestinationText, m_aMathBuffer); break;
     case DESTINATION_MF: m_aMathBuffer.appendClosingTag(M_TOKEN(f)); break;
     case DESTINATION_MFPR: m_aMathBuffer.appendClosingTag(M_TOKEN(fPr)); break;
     case DESTINATION_MCTRLPR: m_aMathBuffer.appendClosingTag(M_TOKEN(ctrlPr)); break;