swaybar: only subscribe to required events

This adds barconfig_update to the list of subscribed events, as well as
checking when the other events need to be subscribed to.

1 files changed, 6 insertions, 2 deletions

diff --git a/swaybar/ipc.c b/swaybar/ipc.c
index 84046ab5..26b7eca6 100644
--- a/swaybar/ipc.c
+++ b/swaybar/ipc.c
@@ -356,8 +356,12 @@ bool ipc_initialize(struct swaybar *bar) {
         free(res);
         ipc_get_outputs(bar);
 
-        const char *subscribe = "[ \"workspace\", \"mode\" ]";
-        len = strlen(subscribe);
+        struct swaybar_config *config = bar->config;
+        char subscribe[128]; // suitably large buffer
+        len = snprintf(subscribe, 128,
+                        "[ \"barconfig_update\" %s %s ]",
+                        config->binding_mode_indicator ? ", \"mode\"" : "",
+                        config->workspace_buttons ? ", \"workspace\"" : "");
         free(ipc_single_command(bar->ipc_event_socketfd,
                         IPC_SUBSCRIBE, subscribe, &len));
         return true;