Define __repr__ on SimpleMetadata

simpinkscr/simple_inkscape_scripting.py

@@ -2149,7 +2149,7 @@ class RectangularForeignObject(inkex.ForeignObject,
     pass
 
 
-class SimpleMetadata():
+class SimpleMetadata(GenericReprMixin):
     'Provide a simple interface to document metadata.'
 
     def __init__(self):
@@ -2329,12 +2329,19 @@ def __init__(self):
         }
         self._licenses['Open Font License'] = self._licenses['OFL']
 
+    def get_inkex_object(self):
+        '''Return the SimpleMetadata's underlying inkex object.
+        Regrettably, this exhibits the side effect of creating a
+        <metadata> tag if one does not already exist (tested with
+        Inkscape 1.3.2.'''
+        global _simple_top
+        return _simple_top.svg_root.metadata
+
     def _search_hierarchy(self, *args):
         '''Search an XML hierarchy given tuples of (namespace, tag).
         <rdf:RDF> is the implicit first element of the hierarchy.  This
         method returns the final node.'''
-        global _simple_top
-        elt = _simple_top.svg_root.metadata
+        elt = self.get_inkex_object()
         for ns_tag in [(self.rdf, 'RDF')] + list(args):
             child = elt.find('./{%s}%s' % ns_tag)
             if child is None:
@@ -2346,8 +2353,7 @@ def _create_hierarchy(self, *args):
         '''Create an XML hierarchy given tuples of (namespace, tag).
         <rdf:RDF> is the implicit first element of the hierarchy.  This
         method returns the final node.'''
-        global _simple_top
-        elt = _simple_top.svg_root.metadata
+        elt = self.get_inkex_object()
         for ns_tag in [(self.rdf, 'RDF')] + list(args):
             child = elt.find('./{%s}%s' % ns_tag)
             if child is None: