Implement bar gaps

Adds the bar subcommand `gaps <amount>|<horizontal> <vertical>|<top>
<right> <bottom> <left>` to set gaps for swaybar. Due to restrictions on
margins for a layer_surface, only the sides that are anchored to an edge
of the screen can have gaps. Since there is support for per-side outer
gaps for workspaces, those should be able to be used instead for the
last side.

1 files changed, 6 insertions, 0 deletions

diff --git a/include/swaybar/config.h b/include/swaybar/config.h
index 700e6b60..fd7c6ec4 100644
--- a/include/swaybar/config.h
+++ b/include/swaybar/config.h
@@ -42,6 +42,12 @@ struct swaybar_config {
         struct wl_list outputs; // config_output::link
         bool all_outputs;
         int height;
+        struct {
+                int top;
+                int right;
+                int bottom;
+                int left;
+        } gaps;
 
         struct {
                 uint32_t background;