xmloff: add a generic LibreOffice ODF extension namespace

XML_NAMESPACE_LO_EXT can be used for elements and attributes that are
not yet specified by OpenDocument.

Change-Id: Id29392533d46f6592d964ce79c05ffefa4d69ebc
Reviewed-on: https://gerrit.libreoffice.org/5419Tested-by: Thorsten Behrens <tbehrens@suse.com>
Reviewed-by: Thorsten Behrens <tbehrens@suse.com>

include/xmloff/xmlnmspe.hxx

@@ -82,8 +82,9 @@ XML_NAMESPACE_EXT( TABLE,       38U )
 XML_NAMESPACE_EXT( CHART,       39U )
 XML_NAMESPACE_EXT( DRAW,        40U )
 XML_NAMESPACE_EXT( CALC,        41U )
+XML_NAMESPACE_EXT( LO,          42U )
 
-#define _XML_OLD_NAMESPACE_BASE 42U
+#define _XML_OLD_NAMESPACE_BASE 43U
 
 // namespaces used in the technical preview (SO 5.2)
 XML_OLD_NAMESPACE( FO,      0U )

include/xmloff/xmltoken.hxx

@@ -152,6 +152,9 @@ namespace xmloff { namespace token {
         // calc extensions
         XML_NP_CALC_EXT,
         XML_N_CALC_EXT,
+        // generic LO extensions
+        XML_NP_LO_EXT,
+        XML_N_LO_EXT,
 
         // units
         XML_UNIT_MM,

xmloff/source/core/xmlexp.cxx

@@ -353,6 +353,9 @@ void SvXMLExport::_InitCtor()
                 GetXMLToken(XML_NP_CALC_EXT), GetXMLToken(XML_N_CALC_EXT), XML_NAMESPACE_CALC_EXT);
             mpNamespaceMap->Add(
                 GetXMLToken(XML_NP_DRAW_EXT), GetXMLToken(XML_N_DRAW_EXT), XML_NAMESPACE_DRAW_EXT);
+            mpNamespaceMap->Add(
+                GetXMLToken(XML_NP_LO_EXT), GetXMLToken(XML_N_LO_EXT),
+                XML_NAMESPACE_LO_EXT);
         }
     }
     if( (getExportFlags() & (EXPORT_MASTERSTYLES|EXPORT_CONTENT) ) != 0 )

xmloff/source/core/xmlimp.cxx

@@ -371,6 +371,8 @@ void SvXMLImport::_InitCtor()
         mpNamespaceMap->Add( OUString( sXML_np__css3text ), GetXMLToken(XML_N_CSS3TEXT), XML_NAMESPACE_CSS3TEXT );
 
         mpNamespaceMap->Add( "_calc_libo", GetXMLToken(XML_N_CALC_EXT), XML_NAMESPACE_CALC_EXT);
+        mpNamespaceMap->Add( "_office_libo",
+                             GetXMLToken(XML_N_LO_EXT), XML_NAMESPACE_LO_EXT);
     }
 
     msPackageProtocol = "vnd.sun.star.Package:";

xmloff/source/core/xmltoken.cxx

@@ -157,6 +157,8 @@ namespace xmloff { namespace token {
         // extension namespace for calc extensions
         TOKEN( "calcext",                         XML_NP_CALC_EXT ),
         TOKEN( "urn:org:documentfoundation:names:experimental:calc:xmlns:calcext:1.0", XML_N_CALC_EXT ),
+        TOKEN( "loext",                           XML_NP_LO_EXT ),
+        TOKEN( "urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.0", XML_N_LO_EXT ),
 
         // units
         TOKEN( "mm",                              XML_UNIT_MM ),