1 files changed, 16 insertions, 0 deletions

diff --git a/sway/tree/output.c b/sway/tree/output.c
index 7fbeeebd..50a2c535 100644
--- a/sway/tree/output.c
+++ b/sway/tree/output.c
@@ -1,4 +1,5 @@
 #define _POSIX_C_SOURCE 200809L
+#include <assert.h>
 #include <ctype.h>
 #include <string.h>
 #include <strings.h>
@@ -12,6 +13,21 @@
 #include "log.h"
 #include "util.h"
 
+enum wlr_direction opposite_direction(enum wlr_direction d) {
+        switch (d) {
+        case WLR_DIRECTION_UP:
+                return WLR_DIRECTION_DOWN;
+        case WLR_DIRECTION_DOWN:
+                return WLR_DIRECTION_UP;
+        case WLR_DIRECTION_RIGHT:
+                return WLR_DIRECTION_LEFT;
+        case WLR_DIRECTION_LEFT:
+                return WLR_DIRECTION_RIGHT;
+        }
+        assert(false);
+        return 0;
+}
+
 static void restore_workspaces(struct sway_output *output) {
         // Workspace output priority
         for (int i = 0; i < root->outputs->length; i++) {