cssnode: Propagate NTH_LAST_CHILD changes properly

We were just catching the previous sibling before. Now we properly
invalidate all previous siblings (and also all other wiblings, but we
can think about optimizing that later).

diff --git a/gtk/gtkcssnode.c b/gtk/gtkcssnode.c
index 7a06d6ae9e0e392be7074aaaa0edf9a003a59077..aa278eb70ae47836170d73436bbf7794060d5957 100644 (file)
--- a/gtk/gtkcssnode.c
+++ b/gtk/gtkcssnode.c
@@ -1005,8 +1005,11 @@ gtk_css_node_set_visible (GtkCssNode *cssnode,
                                                     | (cssnode->previous_sibling ? 0 : GTK_CSS_CHANGE_FIRST_CHILD));
 
   if (cssnode->previous_sibling)
-    gtk_css_node_invalidate (cssnode->previous_sibling, GTK_CSS_CHANGE_NTH_LAST_CHILD
-                                                        | (cssnode->next_sibling ? 0 : GTK_CSS_CHANGE_LAST_CHILD));
+    {
+      if (cssnode->next_sibling)
+        gtk_css_node_invalidate (cssnode->previous_sibling, GTK_CSS_CHANGE_LAST_CHILD);
+      gtk_css_node_invalidate (cssnode->parent->first_child, GTK_CSS_CHANGE_NTH_LAST_CHILD);
+    }
 }
 
 gboolean