general: allow cells to override "loading..." message (#21853)

combo/apps/dashboard/templates/combo/dashboardcell.html

@@ -3,7 +3,7 @@
 {% with cell=tile.cell %}
 <div class="cell {{ cell.css_class_names }} {% if cell.slug %}{{cell.slug}}{% endif %}"
      data-ajax-cell-url="{{ site_base }}{% url 'combo-public-ajax-page-cell' page_pk=cell.page.id cell_reference=cell.get_reference %}"
-     data-ajax-cell-loading-message="{% trans "Loading..." %}"
+     data-ajax-cell-loading-message="{{ cell.loading_message }}"
      {% if cell.ajax_refresh %}
      data-ajax-cell-refresh="{{ cell.ajax_refresh }}"
      {% endif %}><div>{% render_cell cell %}</div></div>

combo/apps/lingo/models.py

@@ -496,6 +496,7 @@ class Items(CellBase):
 
     user_dependant = True
     template_name = 'lingo/combo/items.html'
+    loading_message = _('Loading invoices...')
 
     class Meta:
         abstract = True

combo/apps/notifications/models.py

@@ -111,6 +111,7 @@ class Notification(models.Model):
 class NotificationsCell(CellBase):
     user_dependant = True
     ajax_refresh = 120
+    loading_message = _('Loading notifications...')
 
     class Meta:
         verbose_name = _('User Notifications')

combo/data/models.py

@@ -356,6 +356,9 @@ class CellBase(models.Model):
     # get_badge(self, context); set to None so cell types can be skipped easily
     get_badge = None
 
+    # message displayed when the cell is loaded asynchronously
+    loading_message = _('Loading...')
+
     # modify_global_context(self, context, request=None)
     # Apply changes to the template context that must visible to all cells in the page
     modify_global_context = None
@@ -1126,6 +1129,11 @@ class ConfigJsonCell(JsonCellBase):
     def template_name(self):
         return 'combo/json/%s.html' % self.key
 
+    @property
+    def loading_message(self):
+        return settings.JSON_CELL_TYPES[self.key].get('loading-message',
+                CellBase.loading_message)
+
     def get_default_form_class(self):
         formdef = settings.JSON_CELL_TYPES[self.key].get('form')
         if not formdef:

combo/public/templates/combo/deferred-cell.html

@@ -1,4 +1,4 @@
 {% load i18n %}
 <div class="loading" data-ajax-cell-must-load="true">
-<span class="loading-message">{% trans 'Loading...' %}</span>
+<span class="loading-message">{{ cell.loading_message }}</span>
 </div>

combo/public/templates/combo/placeholder.html

@@ -4,7 +4,7 @@
 <div class="cell {{ cell.css_class_names }} {% if cell.slug %}{{cell.slug}}{% endif %} {% if cell|shown_because_admin:request %}shown-because-admin{% endif %}"
      {% if cell.slug %}id="{{ cell.slug }}"{% endif %}
      data-ajax-cell-url="{{ site_base }}{% url 'combo-public-ajax-page-cell' page_pk=cell.page.id cell_reference=cell.get_reference %}"
-     data-ajax-cell-loading-message="{% trans "Loading..." %}"
+     data-ajax-cell-loading-message="{{ cell.loading_message }}"
      {% if cell.ajax_refresh %}
      data-ajax-cell-refresh="{{ cell.ajax_refresh }}"
      {% endif %}><div>{% render_cell cell %}</div></div>