Clean up container title functions

* Add and use lenient_strcat and lenient_strncat functions
* Rename `concatenate_child_titles` function as that's no longer what it
does
* Rename `container_notify_child_title_changed` because we only need to
notify that the tree structure has changed, not titles
* Don't notify parents when a child changes its title
* Update ancestor titles when changing a container's layout
	* Eg. create nested tabs and change the inner container to stacking
* No need to store tree presentation in both container->name and
formatted_title

1 files changed, 6 insertions, 6 deletions

diff --git a/sway/tree/layout.c b/sway/tree/layout.c
index 91759f7b..edc24deb 100644
--- a/sway/tree/layout.c
+++ b/sway/tree/layout.c
@@ -149,7 +149,7 @@ struct sway_container *container_remove_child(struct sway_container *child) {
                 }
         }
         child->parent = NULL;
-        container_notify_child_title_changed(parent);
+        container_notify_subtree_changed(parent);
 
         return parent;
 }
@@ -184,8 +184,8 @@ void container_move_to(struct sway_container *container,
                 container_sort_workspaces(new_parent);
                 seat_set_focus(seat, new_parent);
         }
-        container_notify_child_title_changed(old_parent);
-        container_notify_child_title_changed(new_parent);
+        container_notify_subtree_changed(old_parent);
+        container_notify_subtree_changed(new_parent);
         if (old_parent) {
                 if (old_parent->type == C_OUTPUT) {
                         arrange_output(old_parent);
@@ -497,8 +497,8 @@ void container_move(struct sway_container *container,
                 }
         }
 
-        container_notify_child_title_changed(old_parent);
-        container_notify_child_title_changed(container->parent);
+        container_notify_subtree_changed(old_parent);
+        container_notify_subtree_changed(container->parent);
 
         if (old_parent) {
                 seat_set_focus(config->handler_context.seat, old_parent);
@@ -847,7 +847,7 @@ struct sway_container *container_split(struct sway_container *child,
                 container_add_child(cont, child);
         }
 
-        container_notify_child_title_changed(cont);
+        container_notify_subtree_changed(cont);
 
         return cont;
 }