a11y: Remove special handling of accessible names for static text widgets

By doing this, we gain the capability to send notifications when their
accessible names change. Also, it simplifies the accessible name
generation logic.

gtk/gtkatcontext.c

@@ -1355,22 +1355,6 @@ gtk_at_context_get_text_accumulate (GtkATContext          *self,
         }
     }
 
-  /* Step 2.G */
-  if (GTK_IS_LABEL (self->accessible))
-    {
-      const char *text = gtk_label_get_text (GTK_LABEL (self->accessible));
-      if (text && not_just_space (text))
-        append_with_space (res, text);
-      return;
-    }
-  else if (GTK_IS_INSCRIPTION (self->accessible))
-    {
-      const char *text = gtk_inscription_get_text (GTK_INSCRIPTION (self->accessible));
-      if (text && not_just_space (text))
-        append_with_space (res, text);
-      return;
-    }
-
   /* Step 2.I */
   if (GTK_IS_WIDGET (self->accessible))
     {

gtk/gtkinscription.c

@@ -805,6 +805,11 @@ gtk_inscription_set_text (GtkInscription *self,
   gtk_widget_queue_draw (GTK_WIDGET (self));
 
   g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_TEXT]);
+
+  gtk_accessible_update_property (GTK_ACCESSIBLE (self),
+                                  GTK_ACCESSIBLE_PROPERTY_LABEL,
+                                  text,
+                                  -1);
 }
 
 /**

gtk/gtklabel.c

@@ -3086,6 +3086,11 @@ gtk_label_set_label_internal (GtkLabel   *self,
 
   g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_LABEL]);
 
+  gtk_accessible_update_property (GTK_ACCESSIBLE (self),
+                                  GTK_ACCESSIBLE_PROPERTY_LABEL,
+                                  self->label,
+                                  -1);
+
   return TRUE;
 }