tdf#123774 OOXML chart export: keep digits of percentages of data points

by exporting PercentageNumberFormat, checking the "Label" format
directly and taking the respective number format based on that.

Note: also fix the "LinkNumberFormatToSource" property. If we create a
pie chart with data labels and set the "Show value as number" or
"Show value as percentage" and check on/off "Source format", this move
is not set the property in the XPropertySet.

Because of this, it fixes also the export of correct value of
"link-data-style-to-source" property into ODS files.
But this patch doesn't fix the export of old ODS files to OOXML,
because they contain wrong (always true) "link-data-style-to-source"
value.

Change-Id: I4098a245dec5bf35cde20c9ccb79aca726230118
Reviewed-on: https://gerrit.libreoffice.org/82703
Reviewed-by: László Németh <nemeth@numbertext.org>
Tested-by: László Németh <nemeth@numbertext.org>
(cherry picked from commit a59eb39c6ec01ae2a9d8ddbb61a9c27f527c9caa)
Reviewed-on: https://gerrit.libreoffice.org/83410

1 files changed, 12 insertions, 2 deletions

diff --git a/oox/source/export/chartexport.cxx b/oox/source/export/chartexport.cxx
index aeb2c8012674..7f0f948a4d85 100644
--- a/oox/source/export/chartexport.cxx
+++ b/oox/source/export/chartexport.cxx
@@ -3264,7 +3264,12 @@ void ChartExport::exportDataLabels(
     if (GetProperty(xPropSet, "LinkNumberFormatToSource"))
         mAny >>= bLinkedNumFmt;
 
-    if (GetProperty(xPropSet, "NumberFormat") || GetProperty(xPropSet, "PercentageNumberFormat"))
+    chart2::DataPointLabel aLabel;
+    bool bLabelIsNumberFormat = true;
+    if( xPropSet->getPropertyValue("Label") >>= aLabel )
+        bLabelIsNumberFormat = aLabel.ShowNumber;
+
+    if (GetProperty(xPropSet, bLabelIsNumberFormat ? OUString("NumberFormat") : OUString("PercentageNumberFormat")))
     {
         sal_Int32 nKey = 0;
         mAny >>= nKey;
@@ -3337,7 +3342,12 @@ void ChartExport::exportDataLabels(
         pFS->startElement(FSNS(XML_c, XML_dLbl));
         pFS->singleElement(FSNS(XML_c, XML_idx), XML_val, OString::number(nIdx));
 
-        if (GetProperty(xLabelPropSet, "NumberFormat") || GetProperty(xLabelPropSet, "PercentageNumberFormat"))
+        if( xLabelPropSet->getPropertyValue("Label") >>= aLabel )
+            bLabelIsNumberFormat = aLabel.ShowNumber;
+        else
+            bLabelIsNumberFormat = true;
+
+        if (GetProperty(xLabelPropSet, bLabelIsNumberFormat ? OUString("NumberFormat") : OUString("PercentageNumberFormat")))
         {
             sal_Int32 nKey = 0;
             mAny >>= nKey;