add unique IDs to containers

1 files changed, 4 insertions, 0 deletions

diff --git a/sway/container.c b/sway/container.c
index 561dcba6..73b627ec 100644
--- a/sway/container.c
+++ b/sway/container.c
@@ -18,8 +18,12 @@
 #define ASSERT_NONNULL(PTR) \
         sway_assert (PTR, #PTR "must be non-null")
 
+
 static swayc_t *new_swayc(enum swayc_types type) {
+        // next id starts at 1 because 0 is assigned to root_container in layout.c
+        static size_t next_id = 1;
         swayc_t *c = calloc(1, sizeof(swayc_t));
+        c->id = next_id++;
         c->handle = -1;
         c->gaps = -1;
         c->layout = L_NONE;