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;