Separate root-related code

This creates a root.c and moves bits and pieces from elsewhere into it.

* layout_init has been renamed to root_create and moved into root.c
* root_destroy has been created and is called on shutdown
* scratchpad code has been moved into root.c, because hidden scratchpad
containers are stored in the root struct

1 files changed, 0 insertions, 2 deletions

diff --git a/sway/tree/arrange.c b/sway/tree/arrange.c
index 5452b13c..494a8461 100644
--- a/sway/tree/arrange.c
+++ b/sway/tree/arrange.c
@@ -14,8 +14,6 @@
 #include "list.h"
 #include "log.h"
 
-struct sway_container root_container;
-
 static void apply_horiz_layout(struct sway_container *parent) {
         size_t num_children = parent->children->length;
         if (!num_children) {