forms: add back a tracking_code_box snippet, for some legacy themes (#63337)

wcs/forms/root.py

@@ -48,6 +48,7 @@ from ..qommon import _, emails, errors, get_cfg, misc, ngettext, template
 from ..qommon.admin.emails import EmailsDirectory
 from ..qommon.form import CheckboxWidget, EmailWidget, Form, HiddenErrorWidget, HtmlWidget, StringWidget
 from ..qommon.template import TemplateError
+from ..qommon.template_utils import render_block_to_string
 
 
 class SubmittedDraftException(Exception):
@@ -661,6 +662,8 @@ class FormPage(Directory, FormTemplateMixin):
             'formdef': LazyFormDef(self.formdef),
             'form_side': lambda: self.form_side(data=data, magictoken=magictoken),
             'steps': self.step,
+            # legacy, used in some themes
+            'tracking_code_box': lambda: self.tracking_code_box(data, magictoken),
         }
         self.modify_filling_context(context, page, data)
 
@@ -679,6 +682,18 @@ class FormPage(Directory, FormTemplateMixin):
             templates=list(self.get_formdef_template_variants(self.filling_templates)), context=context
         )
 
+    def tracking_code_box(self, data, magictoken):
+        # legacy, used by some themes
+        if not (self.has_draft_support() and data):
+            return ''
+        context = {
+            'view': self,
+            'get_tracking_code': lambda: self.get_tracking_code(data, magictoken),
+        }
+        return render_block_to_string(
+            list(self.get_formdef_template_variants(self.sidebox_templates)), 'tracking-code-box', context
+        )
+
     def handle_computed_fields(self, magictoken, fields):
         fields = [x for x in fields if x.key == 'computed' and x.value_template]
         computed_values = get_session().get_by_magictoken('%s-computed' % magictoken, {})
@@ -1688,10 +1703,11 @@ class FormPage(Directory, FormTemplateMixin):
             'html_form': form,
             'form_side': lambda: self.form_side(data=data, magictoken=magictoken),
             'steps': self.step,
+            # legacy, used in some themes
+            'tracking_code_box': lambda: self.tracking_code_box(data, magictoken),
         }
         context['form'] = form  # legacy
-        if self.has_draft_support() and data:
-            context['tracking_code_box'] = lambda: self.tracking_code_box(data, magictoken)
+
         return template.QommonTemplateResponse(
             templates=list(self.get_formdef_template_variants(self.validation_templates)), context=context
         )