forms: merge monkey-patched select render into new class (#48549)

wcs/qommon/form.py

@@ -290,27 +290,6 @@ def checkbox_render_content(self, standalone=True):
 CheckboxWidget.render_content = checkbox_render_content
 
 
-def select_render_content(self):
-    attrs = {'id': 'form_' + self.name}
-    if self.required:
-        attrs['aria-required'] = 'true'
-    if self.attrs:
-        attrs.update(self.attrs)
-    tags = [htmltag("select", name=self.name, **attrs)]
-    for object, description, key in self.options:
-        if self.is_selected(object):
-            selected = 'selected'
-        else:
-            selected = None
-        if description is None:
-            description = ""
-        r = htmltag("option", value=key, selected=selected)
-        tags.append(r + htmlescape(description) + htmltext('</option>'))
-    tags.append(htmltext("</select>"))
-    return htmltext("\n").join(tags)
-SelectWidget.render_content = select_render_content
-
-
 def get_selection_error_text(*args):
     return _('invalid value selected')
 
@@ -982,6 +961,11 @@ class SingleSelectWidget(quixote.form.widget.SingleSelectWidget):
         self.options = [x[:3] for x in self.full_options]
 
     def render_content(self):
+        attrs = {'id': 'form_' + self.name}
+        if self.required:
+            attrs['aria-required'] = 'true'
+        if self.attrs:
+            attrs.update(self.attrs)
         tags = [htmltag("select", name=self.name, **self.attrs)]
         for object, description, key, attrs in self.full_options:
             if self.is_selected(object):