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, 5 insertions, 1 deletions

diff --git a/include/sway/tree/container.h b/include/sway/tree/container.h
index 493c70e2..a5f591ce 100644
--- a/include/sway/tree/container.h
+++ b/include/sway/tree/container.h
@@ -216,7 +216,11 @@ void container_update_title_textures(struct sway_container *container);
  */
 void container_calculate_title_height(struct sway_container *container);
 
-void container_notify_child_title_changed(struct sway_container *container);
+/**
+ * Notify a container that a tree modification has changed in its children,
+ * so the container can update its tree representation.
+ */
+void container_notify_subtree_changed(struct sway_container *container);
 
 /**
  * Return the height of a regular title bar.