xmloff: ODF export: actually ODF 1.2 does not allow graphic-properties

... in a style with family "paragraph", as detected by a
--with-export-validation build due to the unit test added yesterday.

So use the loext namespace for the style:graphic-properties element,
and also omit it entirely (and rely on the style:paragraph-properties
attributes fo:background-*) if the ODF version is set to 1.2 or 1.1.

Also adapt a previous check that was missing the "drawing-page" style
family, where the style:graphic-properties is allowed (commit
9746dc9a)

(regression from 7d9bb549)

Change-Id: Iedd66483f63020328bd61e1c1e19c62787b8ff6b
(cherry picked from commit b1922eec)
Reviewed-on: https://gerrit.libreoffice.org/18064Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

include/xmloff/xmlexppr.hxx

@@ -151,7 +151,8 @@ public:
     void exportXML(
             SvXMLExport& rExport,
             const ::std::vector< XMLPropertyState >& rProperties,
-            SvXmlExportFlags nFlags = SvXmlExportFlags::NONE ) const;
+            SvXmlExportFlags nFlags = SvXmlExportFlags::NONE,
+            bool bUseExtensionNamespaceForGraphicProperties = false ) const;
 
     /** like above but only properties whose property map index is within the
      *  specified range are exported

xmloff/source/style/impastpl.cxx

@@ -683,6 +683,7 @@ void SvXMLAutoStylePoolP_Impl::exportXML(
                 GetExport().AddAttribute(
                     XML_NAMESPACE_STYLE, XML_FAMILY, aStrFamilyName );
                 if(aStrFamilyName != "graphic" &&
+                        aStrFamilyName != "drawing-page" &&
                         aStrFamilyName != "presentation" &&
                         aStrFamilyName != "chart" )
                     bExtensionNamespace = true;

xmloff/source/style/styleexp.cxx

@@ -316,8 +316,14 @@ bool XMLStyleExport::exportStyle(
         // <style:properties>
         ::std::vector< XMLPropertyState > xPropStates =
             rPropMapper->Filter( xPropSet, true );
+        bool const bUseExtensionNamespaceForGraphicProperties(
+                rXMLFamily != "drawing-page" &&
+                rXMLFamily != "graphic" &&
+                rXMLFamily != "presentation" &&
+                rXMLFamily != "chart");
         rPropMapper->exportXML( GetExport(), xPropStates,
-                                SvXmlExportFlags::IGN_WS );
+                                SvXmlExportFlags::IGN_WS,
+                                bUseExtensionNamespaceForGraphicProperties );
 
         rPropMapper->SetStyleName( OUString() );
 

xmloff/source/style/xmlexppr.cxx

@@ -749,16 +749,18 @@ void SvXMLExportPropertyMapper::exportXML( SvXMLAttributeList& rAttrList,
 void SvXMLExportPropertyMapper::exportXML(
         SvXMLExport& rExport,
         const ::std::vector< XMLPropertyState >& rProperties,
-        SvXmlExportFlags nFlags ) const
+        SvXmlExportFlags nFlags,
+        bool bUseExtensionNamespaceForGraphicProperties) const
 {
-    exportXML( rExport, rProperties, -1, -1,  nFlags );
+    exportXML(rExport, rProperties, -1, -1,  nFlags, bUseExtensionNamespaceForGraphicProperties);
 }
 
+
 void SvXMLExportPropertyMapper::exportXML(
         SvXMLExport& rExport,
         const ::std::vector< XMLPropertyState >& rProperties,
         sal_Int32 nPropMapStartIdx, sal_Int32 nPropMapEndIdx,
-        SvXmlExportFlags nFlags, bool bExtensionNamespace ) const
+        SvXmlExportFlags nFlags, bool bUseExtensionNamespaceForGraphicProperties) const
 {
     sal_uInt16 nPropTypeFlags = 0;
     for( sal_uInt16 i=0; i<MAX_PROP_TYPES; ++i )
@@ -766,6 +768,17 @@ void SvXMLExportPropertyMapper::exportXML(
         sal_uInt16 nPropType = aPropTokens[i].nType;
         if( 0==i || (nPropTypeFlags & (1 << nPropType)) != 0 )
         {
+            sal_uInt16 nNamespace = XML_NAMESPACE_STYLE;
+            if (bUseExtensionNamespaceForGraphicProperties &&
+                aPropTokens[i].eToken == xmloff::token::XML_GRAPHIC_PROPERTIES)
+            {
+                nNamespace = XML_NAMESPACE_LO_EXT;
+                if (rExport.getDefaultVersion() <= SvtSaveOptions::ODFVER_012)
+                {
+                    continue; // don't write for ODF <= 1.2
+                }
+            }
+
             std::vector<sal_uInt16> aIndexArray;
 
             _exportXML( nPropType, nPropTypeFlags,
@@ -779,10 +792,6 @@ void SvXMLExportPropertyMapper::exportXML(
                 (nFlags & SvXmlExportFlags::EMPTY) ||
                 !aIndexArray.empty() )
             {
-                sal_uInt16 nNamespace = XML_NAMESPACE_STYLE;
-                if(bExtensionNamespace && aPropTokens[i].eToken ==
-                        xmloff::token::XML_GRAPHIC_PROPERTIES)
-                    nNamespace = XML_NAMESPACE_LO_EXT;
                 SvXMLElementExport aElem( rExport, nNamespace,
                                   aPropTokens[i].eToken,
                                   bool(nFlags & SvXmlExportFlags::IGN_WS),