forms: add support for html attributes on single select widget options (#48549)

wcs/qommon/form.py

@@ -58,7 +58,7 @@ import quixote.form.widget
 
 from quixote import get_publisher, get_request, get_response, get_session
 from quixote.form import *
-from quixote.html import htmltext, htmltag, htmlescape, TemplateIO
+from quixote.html import htmltext, htmltag, htmlescape, TemplateIO, stringify
 from quixote.http_request import Upload
 from quixote.util import randbytes
 
@@ -958,6 +958,44 @@ class EmailWidget(StringWidget):
                         self.error = _('invalid address domain')
 
 
+class SingleSelectWidget(quixote.form.widget.SingleSelectWidget):
+    def set_options(self, options, *args, **kwargs):
+        # options can be,
+        # - [objects:any, ...]
+        # - [(object:any, description:any), ...]
+        # - [(object:any, description:any, key:any), ...]
+        # - [(object:any, description:any, key:any, html_attrs:dict), ...]
+        self.options = []  # for compatibility with existing quixote methods
+        self.full_options = []
+        for option in options:
+            if isinstance(option, (tuple, list)):
+                if len(option) == 2:
+                    option_tuple = (option[0], option[1], stringify(option[1]))
+                elif len(option) == 3:
+                    option_tuple = (option[0], option[1], stringify(option[2]))
+                elif len(option) >= 4:
+                    option_tuple = (option[0], option[1], stringify(option[2]), option[3])
+            else:
+                option_tuple = (option, option, stringify(option))
+            self.full_options.append(option_tuple)
+        self.full_options = [x + ({},) if len(x) == 3 else x for x in self.full_options]
+        self.options = [x[:3] for x in self.full_options]
+
+    def render_content(self):
+        tags = [htmltag("select", name=self.name, **self.attrs)]
+        for object, description, key, attrs in self.full_options:
+            if self.is_selected(object):
+                selected = 'selected'
+            else:
+                selected = None
+            if description is None:
+                description = ""
+            r = htmltag("option", value=key, selected=selected, **attrs)
+            tags.append(r + htmlescape(description) + htmltext('</option>'))
+        tags.append(htmltext("</select>"))
+        return htmltext("\n").join(tags)
+
+
 class ValidationCondition(Condition):
     def __init__(self, django_condition, value):
         super(ValidationCondition, self).__init__({'type': 'django', 'value': django_condition})