manager: make it possible for cells to override cell_form.html (#7321)

combo/data/models.py

@@ -217,6 +217,7 @@ class CellBase(models.Model):
     default_form_class = None
     visible = True
     user_dependant = False
+    manager_form_template = 'combo/cell_form.html'
 
     class Meta:
         abstract = True
@@ -316,6 +317,9 @@ class CellBase(models.Model):
         return model_forms.modelform_factory(self.__class__,
                 fields=['public', 'groups'])
 
+    def get_extra_manager_context(self):
+        return {}
+
     def is_visible(self, user=None):
         return element_is_visible(self, user=user)
 

combo/manager/templates/combo/cell_form.html

@@ -1,4 +1,5 @@
 {% load i18n %}
+{% block cell-form %}
 <form action="{{ url }}" method="post" data-label-url="{% url 'combo-manager-page-get-additional-label' page_pk=page.id cell_reference=cell.get_reference %}">
 {% csrf_token %}
 {% if form %}
@@ -6,7 +7,9 @@
 {% else %}
   <p>{% trans "There are no options for this cell." %}</p>
 {% endif %}
+{% endblock %}
 <div class="buttons">
+{% block cell-buttons %}
 <a rel="popup" href="{% url 'combo-manager-page-delete-cell' page_pk=page.id cell_reference=cell.get_reference %}">{% trans 'Delete' %}</a> |
 <a rel="popup" href="{% url 'combo-manager-page-visibility-cell' page_pk=page.id cell_reference=cell.get_reference %}">{% trans 'Visibility' %}</a> |
 <a rel="popup" href="{% url 'combo-manager-page-options-cell' page_pk=page.id cell_reference=cell.get_reference %}">{% trans 'Options' %}</a> |
@@ -14,5 +17,6 @@
 {% if form %}
 <button class="save">{% trans 'Save' %}</button>
 {% endif %}
+{% endblock %}
 </div>
 </form>

combo/manager/templatetags/cells.py

@@ -28,5 +28,7 @@ def cell_form(context, cell):
         context['form'] = form_class(instance=cell, prefix='c%s' % cell.get_reference())
     else:
         context['form'] = None
-    cell_form_template = template.loader.get_template('combo/cell_form.html')
-    return cell_form_template.render(context)
+    cell_form_template = template.loader.get_template(cell.manager_form_template)
+    with context.push():
+        context.update(cell.get_extra_manager_context())
+        return cell_form_template.render(context)