tdf#122658: Empty date form field is not exported correctly to DOCX file

We need to export date format and also text content
in case of empty date field. Otherwise the exported
date field will be lost during import into LO Writer
or MSO Word.

Reviewed-on: https://gerrit.libreoffice.org/66194
Tested-by: Jenkins
Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
(cherry picked from commit 24613d7a)

Change-Id: I5cf65bedba010f64ca8f56262057f3cce32b0943
Reviewed-on: https://gerrit.libreoffice.org/66289Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>

sw/source/filter/ww8/docxattributeoutput.cxx

@@ -4997,7 +4997,13 @@ void DocxAttributeOutput::WritePostponedFormControl(const SdrObject* pObject)
             }
         }
         else
+        {
             aContentText = xPropertySet->getPropertyValue("HelpText").get<OUString>();
+            if(aContentText.isEmpty())
+                aContentText = " "; // Need to write out something to have it imported by MS Word
+            if(sDateFormat.isEmpty())
+                sDateFormat = "dd/MM/yyyy"; // Need to set date format even if there is no date set
+        }
 
         // output component
 

writerfilter/source/dmapper/SdtHelper.cxx

@@ -125,7 +125,7 @@ void SdtHelper::createDateControl(OUString const& rContentText, const beans::Pro
         xPropertySet->setPropertyValue("Date", uno::makeAny(aDate));
     }
     else
-        xPropertySet->setPropertyValue("HelpText", uno::makeAny(rContentText));
+        xPropertySet->setPropertyValue("HelpText", uno::makeAny(rContentText.trim()));
 
     // append date format to grab bag
     comphelper::SequenceAsHashMap aGrabBag;