Add status side panel to generic CreateView and simplify snippets CreateView

client/scss/components/_footer.scss

@@ -20,6 +20,11 @@
   &__emphasise-span-tags span {
     color: theme('colors.warning.100');
   }
+
+  // Don't apply horizontal margins if nice-padding is applied in the parent
+  .nice-padding & {
+    margin-inline: 0;
+  }
 }
 
 .footer__container {

wagtail/admin/templates/wagtailadmin/generic/form.html

@@ -43,10 +43,10 @@
 
 {% block extra_js %}
     {{ block.super }}
-    {{ form.media.js }}
+    {{ media.js }}
 {% endblock %}
 
 {% block extra_css %}
     {{ block.super }}
-    {{ form.media.css }}
+    {{ media.css }}
 {% endblock %}

wagtail/admin/views/generic/models.py

@@ -588,10 +588,25 @@ class CreateView(
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
+        self.form = context.get("form")
+        side_panels = self.get_side_panels()
         context["action_url"] = self.get_add_url()
         context["submit_button_label"] = self.submit_button_label
+        context["side_panels"] = side_panels
+        context["media"] += side_panels.media
         return context
 
+    def get_side_panels(self):
+        side_panels = [
+            StatusSidePanel(
+                self.form.instance,
+                self.request,
+                locale=self.locale,
+                translations=self.translations,
+            )
+        ]
+        return MediaContainer(side_panels)
+
     def get_translations(self):
         add_url = self.get_add_url()
         return [
@@ -833,11 +848,10 @@ class EditView(
         context = super().get_context_data(**kwargs)
         self.form = context.get("form")
         side_panels = self.get_side_panels()
-        media = context.get("media") + side_panels.media
         context["action_url"] = self.get_edit_url()
         context["history_url"] = self.get_history_url()
         context["side_panels"] = side_panels
-        context["media"] = media
+        context["media"] += side_panels.media
         context["submit_button_label"] = self.submit_button_label
         context["can_delete"] = (
             self.permission_policy is None

wagtail/snippets/templates/wagtailsnippets/snippets/create.html

@@ -1,37 +1,26 @@
-{% extends "wagtailadmin/base.html" %}
+{% extends "wagtailadmin/generic/create.html" %}
 {% load i18n wagtailadmin_tags %}
-{% block titletag %}{% blocktrans trimmed with snippet_type_name=model_opts.verbose_name %}New  {{ snippet_type_name }}{% endblocktrans %}{% endblock %}
-{% block bodyclass %}editor-view{% endblock %}
-{% block content %}
+
+{% block slim_header %}
+    {% comment %}
+        We can't use the `only` keyword yet, because the SnippetStatusSidePanel still rely on some
+        context variables from the view. As a result, we can't reuse the include from the generic
+        template and have to copy it here without the `only` keyword.
+    {% endcomment %}
     {% include 'wagtailadmin/shared/headers/slim_header.html' with breadcrumbs_items=breadcrumbs_items side_panels=side_panels history_url=history_url %}
-
-    {% trans "New" as new_str %}
-    {% include "wagtailadmin/shared/header.html" with title=new_str subtitle=model_opts.verbose_name icon=header_icon merged=1 only %}
-
-    <form action="{{ action_url }}" method="POST" novalidate{% if form.is_multipart %} enctype="multipart/form-data"{% endif %} data-edit-form>
-        {% csrf_token %}
-
-        <div class="nice-padding">
-            {{ panel.render_form_content }}
-        </div>
-
-        <footer class="footer">
-            <nav class="actions actions--primary footer__container w-grid" aria-label="{% trans 'Actions' %}">
-                {{ action_menu.render_html }}
-            </nav>
-        </footer>
-    </form>
-
 {% endblock %}
 
-{% block extra_css %}
-    {{ block.super }}
-    {{ media.css }}
+{% block actions %}
+    <footer class="footer">
+        <nav class="actions actions--primary footer__container w-grid" aria-label="{% trans 'Actions' %}">
+            {{ action_menu.render_html }}
+        </nav>
+    </footer>
 {% endblock %}
+
 {% block extra_js %}
     {{ block.super }}
     {% include "wagtailadmin/pages/_editor_js.html" %}
-    {{ media.js }}
 
     <script>
         // Set wagtailConfig.ACTIVE_CONTENT_LOCALE if this is a translated page

wagtail/snippets/tests/test_viewset.py

@@ -87,7 +87,7 @@ class TestCustomIcon(BaseSnippetViewSetTests):
             # TODO: Some of these views have been migrated to use the slim_header
             # only, so there is no header_icon anymore.
             # ("list", []),
-            ("add", []),
+            # ("add", []),
             ("edit", [pk]),
             ("delete", [pk]),
             # ("usage", [pk]),

wagtail/snippets/views/snippets.py

@@ -271,21 +271,9 @@ class CreateView(generic.CreateEditViewOptionalFeaturesMixin, generic.CreateView
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-
-        self.form = context.get("form")
         action_menu = self._get_action_menu()
-        side_panels = self.get_side_panels()
-        media = context.get("media") + MediaContainer([action_menu, side_panels]).media
-
-        context.update(
-            {
-                "model_opts": self.model._meta,
-                "action_menu": action_menu,
-                "side_panels": side_panels,
-                "media": media,
-            }
-        )
-
+        context["media"] += action_menu.media
+        context["action_menu"] = action_menu
         return context