fdo#83058 File corrupt due to data label position is invalid in chart.xml

- File getting corrupted after RT due to data label position is invalid in chart.xml
- LO must not export invalid label position property if chart type doesn't support that positioning in MS Office.
- For clusterd bar chart XML Difference
chart1.xml
Original file
<c:barChart>
  <c:grouping val="clustered" />
  <c:ser>
      <c:dLbls>
         ...
        <c:dLbl>
            <c:dLblPos val="outEnd" />
        </c:dLbl>
         ...
      </c:dLbls>
  </c:ser>
</c:barChart>

Roundtrip file
<c:barChart>
  <c:grouping val="clustered" />
  <c:ser>
      <c:dLbls>
         ...
        <c:dLbl>
            <c:dLblPos val="r" />
        </c:dLbl>
         ...
      </c:dLbls>
  </c:ser>
</c:barChart>

Change-Id: I9cae11b8d198aaa70fb05cb3bf329cd898519170
Reviewed-on: https://gerrit.libreoffice.org/11141
Reviewed-by: Kohei Yoshida <libreoffice@kohei.us>
Tested-by: Kohei Yoshida <libreoffice@kohei.us>

chart2/qa/extras/chart2export.cxx

@@ -79,6 +79,7 @@ public:
     void testDataLabelDoughnutChartDOCX();
     void testDataLabelAreaChartDOCX();
     void testDataLabelDefaultLineChartDOCX();
+    void testFdo83058dlblPos();
 
     CPPUNIT_TEST_SUITE(Chart2ExportTest);
     CPPUNIT_TEST(test);
@@ -123,6 +124,7 @@ public:
     CPPUNIT_TEST(testDataLabelDoughnutChartDOCX);
     CPPUNIT_TEST(testDataLabelAreaChartDOCX);
     CPPUNIT_TEST(testDataLabelDefaultLineChartDOCX);
+    CPPUNIT_TEST(testFdo83058dlblPos);
     CPPUNIT_TEST_SUITE_END();
 
 protected:
@@ -867,7 +869,7 @@ void Chart2ExportTest::testDataLabelClusteredBarChartDOCX()
     CPPUNIT_ASSERT(pXmlDoc);
 
     // This was "t", should be one of the allowed values.
-    assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:barChart/c:ser[1]/c:dLbls/c:dLbl[2]/c:dLblPos", "val", "ctr");
+    assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:barChart/c:ser[1]/c:dLbls/c:dLbl[2]/c:dLblPos", "val", "outEnd");
 }
 
 void Chart2ExportTest::testDataLabelRadarChartDOCX()
@@ -1186,6 +1188,17 @@ void Chart2ExportTest::testLabelStringODS()
     CPPUNIT_ASSERT_EQUAL(OUString("\"LabelName\""), aLabelString);
 }
 
+void Chart2ExportTest::testFdo83058dlblPos()
+{
+    load ("/chart2/qa/extras/data/docx/", "fdo83058_dlblPos.docx");
+    xmlDocPtr pXmlDoc = parseExport("word/charts/chart","Office Open XML Text");
+    CPPUNIT_ASSERT(pXmlDoc);
+    assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:barChart/c:ser[1]/c:dLbls[1]/c:dLbl[2]/c:dLblPos", "val", "outEnd");
+    assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:barChart/c:ser[1]/c:dLbls[1]/c:dLbl[3]/c:dLblPos", "val", "outEnd");
+    assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:barChart/c:ser[1]/c:dLbls[1]/c:dLbl[4]/c:dLblPos", "val", "outEnd");
+    assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:barChart/c:ser[1]/c:dLbls[1]/c:dLbl[5]/c:dLblPos", "val", "outEnd");
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(Chart2ExportTest);
 
 CPPUNIT_PLUGIN_IMPLEMENT();

include/oox/export/chartexport.hxx

@@ -99,7 +99,6 @@ private:
     bool                mbIs3DChart;
     bool                mbStacked;
     bool                mbPercent;
-    bool                mbClustered;
 
 private:
     sal_Int32 getChartType();

oox/source/export/chartexport.cxx

@@ -446,7 +446,6 @@ ChartExport::ChartExport( sal_Int32 nXmlNamespace, FSHelperPtr pFS, Reference< f
     , mbIs3DChart( false )
     , mbStacked(false)
     , mbPercent(false)
-    , mbClustered(false)
 {
 }
 
@@ -2656,13 +2655,15 @@ void ChartExport::exportDataLabels(
     aParam.mbExport = !mbIs3DChart;
     aParam.meDefault = rInfo.mnDefLabelPos;
     aParam.allowAll();
-    switch (getChartType()) // diagram chart type
+    switch (eChartType) // diagram chart type
     {
         case chart::TYPEID_PIE:
+            if(getChartType() == chart::TYPEID_DOUGHNUT)
+                aParam.mbExport = false;
+            else
             // All pie charts support label placement.
             aParam.mbExport = true;
         break;
-        case chart::TYPEID_DOUGHNUT:
         case chart::TYPEID_AREA:
         case chart::TYPEID_RADARLINE:
         case chart::TYPEID_RADARAREA:
@@ -2670,7 +2671,7 @@ void ChartExport::exportDataLabels(
             aParam.mbExport = false;
         break;
         case chart::TYPEID_BAR:
-            if (mbStacked || mbPercent || mbClustered)
+            if (mbStacked || mbPercent)
             {
                 aParam.maAllowedValues.clear();
                 aParam.maAllowedValues.insert(css::chart::DataLabelPlacement::CENTER);
@@ -2678,6 +2679,15 @@ void ChartExport::exportDataLabels(
                 aParam.maAllowedValues.insert(css::chart::DataLabelPlacement::NEAR_ORIGIN);
                 aParam.meDefault = css::chart::DataLabelPlacement::CENTER;
             }
+            else  // Clustered bar chart
+            {
+                aParam.maAllowedValues.clear();
+                aParam.maAllowedValues.insert(css::chart::DataLabelPlacement::CENTER);
+                aParam.maAllowedValues.insert(css::chart::DataLabelPlacement::INSIDE);
+                aParam.maAllowedValues.insert(css::chart::DataLabelPlacement::OUTSIDE);
+                aParam.maAllowedValues.insert(css::chart::DataLabelPlacement::NEAR_ORIGIN);
+                aParam.meDefault = css::chart::DataLabelPlacement::OUTSIDE;
+            }
         break;
         default:
             ;
@@ -2818,7 +2828,6 @@ void ChartExport::exportGrouping( bool isBar )
         if( isBar && !isDeep3dChart() )
         {
             grouping = "clustered";
-            mbClustered = true;
         }
         else
             grouping = "standard";