Wrap to fartherest output when running focus output

Also moves the `opposite_direction` function into `util.c` as it's used
in two places now.

4 files changed, 29 insertions, 13 deletions

diff --git a/common/util.c b/common/util.c
index 78d46a2a..f4588b57 100644
--- a/common/util.c
+++ b/common/util.c
@@ -1,4 +1,5 @@
 #define _XOPEN_SOURCE 700
+#include <assert.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
@@ -138,3 +139,18 @@ bool parse_boolean(const char *boolean, bool current) {
         // All other values are false to match i3
         return false;
 }
+
+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;
+}
diff --git a/include/util.h b/include/util.h
index 56ca2eb8..f143d0c0 100644
--- a/include/util.h
+++ b/include/util.h
@@ -59,4 +59,6 @@ uint32_t parse_color(const char *color);
  */
 bool parse_boolean(const char *boolean, bool current);
 
+enum wlr_direction opposite_direction(enum wlr_direction d);
+
 #endif
diff --git a/sway/commands/focus.c b/sway/commands/focus.c
index 521b2427..cef92144 100644
--- a/sway/commands/focus.c
+++ b/sway/commands/focus.c
@@ -196,6 +196,17 @@ static struct cmd_results *focus_output(struct sway_seat *seat,
                 }
                 struct sway_workspace *ws = seat_get_focused_workspace(seat);
                 output = output_get_in_direction(ws->output, direction);
+
+                if (!output) {
+                        int center_lx = ws->output->lx + ws->output->width / 2;
+                        int center_ly = ws->output->ly + ws->output->height / 2;
+                        struct wlr_output *target = wlr_output_layout_farthest_output(
+                                        root->output_layout, opposite_direction(direction),
+                                        ws->output->wlr_output, center_lx, center_ly);
+                        if (target) {
+                                output = output_from_wlr_output(target);
+                        }
+                }
         }
 
         free(identifier);
diff --git a/sway/commands/move.c b/sway/commands/move.c
index 30c198e4..9035e3e2 100644
--- a/sway/commands/move.c
+++ b/sway/commands/move.c
@@ -27,19 +27,6 @@ static const char *expected_syntax =
         "'move <container|window|workspace> [to] output <name|direction>' or "
         "'move <container|window> [to] mark <mark>'";
 
-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;
-                default:
-                        return WLR_DIRECTION_RIGHT;
-        }
-}
-
 static struct sway_output *output_in_direction(const char *direction_string,
                 struct sway_output *reference, int ref_lx, int ref_ly) {
         struct {