Introduce orientation_from_direction

src/move.c

@@ -265,7 +265,7 @@ void tree_move(Con *con, int direction) {
         return;
     }
 
-    orientation_t o = (direction == D_LEFT || direction == D_RIGHT ? HORIZ : VERT);
+    orientation_t o = orientation_from_direction(direction);
 
     Con *same_orientation = con_parent_with_orientation(con, o);
     /* The do {} while is used to 'restart' at this point with a different

src/resize.c

@@ -57,7 +57,7 @@ bool resize_find_tiling_participants(Con **current, Con **other, direction_t dir
     }
 
     /* Go up in the tree and search for a container to resize */
-    const orientation_t search_orientation = ((direction == D_LEFT || direction == D_RIGHT) ? HORIZ : VERT);
+    const orientation_t search_orientation = orientation_from_direction(direction);
     const bool dir_backwards = (direction == D_UP || direction == D_LEFT);
     while (first->type != CT_WORKSPACE &&
            first->type != CT_FLOATING_CON &&

src/util.c

@@ -507,3 +507,11 @@ ssize_t slurp(const char *path, char **buf) {
     }
     return (ssize_t)n;
 }
+
+/*
+ * Convert a direction to its corresponding orientation.
+ *
+ */
+orientation_t orientation_from_direction(direction_t direction) {
+    return (direction == D_LEFT || direction == D_RIGHT) ? HORIZ : VERT;
+}