fdo#66171 ListBox correctly save empty or zero BoundColumn

Change-Id: I05fa923f962191081ea3318837d3e181c183b466
Reviewed-on: https://gerrit.libreoffice.org/4589
Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>

4 files changed, 17 insertions, 6 deletions

diff --git a/forms/source/component/ListBox.cxx b/forms/source/component/ListBox.cxx
index 14569f5a9bdb..95b7ea13449b 100644
--- a/forms/source/component/ListBox.cxx
+++ b/forms/source/component/ListBox.cxx
@@ -650,6 +650,11 @@ namespace frm
             _rxInStream >> nValue;
             m_aBoundColumn <<= nValue;
         }
+        else // the constructor initialises to 1, so if it is empty,
+             // we must explicitly set to empty
+        {
+            m_aBoundColumn = Any();
+        }
 
         if (nVersion > 2)
             readHelpTextCompatibly(_rxInStream);
diff --git a/xmloff/source/forms/elementexport.cxx b/xmloff/source/forms/elementexport.cxx
index b10fa4370ce3..ca2834822586 100644
--- a/xmloff/source/forms/elementexport.cxx
+++ b/xmloff/source/forms/elementexport.cxx
@@ -890,7 +890,8 @@ namespace xmloff
                 OAttributeMetaData::getDatabaseAttributeNamespace(DA_BOUND_COLUMN),
                 OAttributeMetaData::getDatabaseAttributeName(DA_BOUND_COLUMN),
                 PROPERTY_BOUNDCOLUMN,
-                0);
+                0,
+                true);
             RESET_BIT( nIncludeDatabase, DA_BOUND_COLUMN );
         }
 
diff --git a/xmloff/source/forms/propertyexport.cxx b/xmloff/source/forms/propertyexport.cxx
index 73f5e1dddc2e..7e7597b723e2 100644
--- a/xmloff/source/forms/propertyexport.cxx
+++ b/xmloff/source/forms/propertyexport.cxx
@@ -319,7 +319,7 @@ namespace xmloff
 
     //---------------------------------------------------------------------
     void OPropertyExport::exportInt16PropertyAttribute(const sal_uInt16 _nNamespaceKey, const sal_Char* _pAttributeName,
-        const OUString& _rPropertyName, const sal_Int16 _nDefault)
+        const OUString& _rPropertyName, const sal_Int16 _nDefault, bool force)
     {
         DBG_CHECK_PROPERTY( _rPropertyName, sal_Int16 );
 
@@ -328,7 +328,7 @@ namespace xmloff
         m_xProps->getPropertyValue( _rPropertyName ) >>= nCurrentValue;
 
         // add the attribute
-        if (_nDefault != nCurrentValue)
+        if (force || _nDefault != nCurrentValue)
         {
             // let the formatter of the export context build a string
             OUStringBuffer sBuffer;
diff --git a/xmloff/source/forms/propertyexport.hxx b/xmloff/source/forms/propertyexport.hxx
index a5567538af47..ffc7f7cc5b80 100644
--- a/xmloff/source/forms/propertyexport.hxx
+++ b/xmloff/source/forms/propertyexport.hxx
@@ -160,14 +160,19 @@ namespace xmloff
             @param _pPropertyName
                 the name of the property to ask the control for
             @param _nDefault
-                the default of the attribute. If the current property value equals this default, no
-                attribute is added.
+                the default of the attribute. See force parameter.
+            @param force
+                if true and the property is not set or does not contain a sal_Int16,
+                then _nDefault is written out.
+                if false and the current property value equals _nDefault,
+                then no attribute is added.
         */
         void exportInt16PropertyAttribute(
             const sal_uInt16 _nNamespaceKey,
             const sal_Char* _pAttributeName,
             const OUString& _rPropertyName,
-            const sal_Int16 _nDefault);
+            const sal_Int16 _nDefault,
+            const bool force = false);
 
         /** add an attribute which is represented by a sal_Int32 property to the export context