swaybar: save id upon startup

This adds an id property to the bar, which will be used to filter
barconfig_update events

include/swaybar/bar.h

@@ -46,6 +46,8 @@ struct swaybar_hotspot {
 };
 
 struct swaybar {
+	char *id;
+
 	struct wl_display *display;
 	struct wl_compositor *compositor;
 	struct zwlr_layer_shell_v1 *layer_shell;
@@ -96,7 +98,7 @@ struct swaybar_workspace {
 	bool urgent;
 };
 
-bool bar_setup(struct swaybar *bar, const char *socket_path, const char *bar_id);
+bool bar_setup(struct swaybar *bar, const char *socket_path);
 void bar_run(struct swaybar *bar);
 void bar_teardown(struct swaybar *bar);
 

include/swaybar/ipc.h

@@ -3,7 +3,7 @@
 #include <stdbool.h>
 #include "swaybar/bar.h"
 
-bool ipc_initialize(struct swaybar *bar, const char *bar_id);
+bool ipc_initialize(struct swaybar *bar);
 bool handle_ipc_readable(struct swaybar *bar);
 void ipc_get_workspaces(struct swaybar *bar);
 void ipc_send_workspace_command(struct swaybar *bar, const char *ws);

swaybar/bar.c

@@ -517,14 +517,13 @@ static void set_bar_dirty(struct swaybar *bar) {
 	}
 }
 
-bool bar_setup(struct swaybar *bar,
-		const char *socket_path, const char *bar_id) {
+bool bar_setup(struct swaybar *bar, const char *socket_path) {
 	bar_init(bar);
 	init_event_loop();
 
 	bar->ipc_socketfd = ipc_open_socket(socket_path);
 	bar->ipc_event_socketfd = ipc_open_socket(socket_path);
-	if (!ipc_initialize(bar, bar_id)) {
+	if (!ipc_initialize(bar)) {
 		return false;
 	}
 	if (bar->config->status_command) {
@@ -625,4 +624,5 @@ void bar_teardown(struct swaybar *bar) {
 	if (bar->status) {
 		status_line_free(bar->status);
 	}
+	free(bar->id);
 }

swaybar/ipc.c

@@ -345,10 +345,10 @@ void ipc_execute_binding(struct swaybar *bar, struct swaybar_binding *bind) {
 			IPC_COMMAND, bind->command, &len));
 }
 
-bool ipc_initialize(struct swaybar *bar, const char *bar_id) {
-	uint32_t len = strlen(bar_id);
+bool ipc_initialize(struct swaybar *bar) {
+	uint32_t len = strlen(bar->id);
 	char *res = ipc_single_command(bar->ipc_socketfd,
-			IPC_GET_BAR_CONFIG, bar_id, &len);
+			IPC_GET_BAR_CONFIG, bar->id, &len);
 	if (!ipc_parse_config(bar->config, res)) {
 		free(res);
 		return false;

swaybar/main.c

@@ -22,7 +22,6 @@ void sway_terminate(int code) {
 
 int main(int argc, char **argv) {
 	char *socket_path = NULL;
-	char *bar_id = NULL;
 	bool debug = false;
 
 	static struct option long_options[] = {
@@ -59,7 +58,7 @@ int main(int argc, char **argv) {
 			socket_path = strdup(optarg);
 			break;
 		case 'b': // Type
-			bar_id = strdup(optarg);
+			swaybar.id = strdup(optarg);
 			break;
 		case 'v':
 			fprintf(stdout, "swaybar version " SWAY_VERSION "\n");
@@ -80,7 +79,7 @@ int main(int argc, char **argv) {
 		wlr_log_init(WLR_ERROR, NULL);
 	}
 
-	if (!bar_id) {
+	if (!swaybar.id) {
 		wlr_log(WLR_ERROR, "No bar_id passed. "
 				"Provide --bar_id or let sway start swaybar");
 		return 1;
@@ -96,13 +95,12 @@ int main(int argc, char **argv) {
 
 	signal(SIGTERM, sig_handler);
 
-	if (!bar_setup(&swaybar, socket_path, bar_id)) {
+	if (!bar_setup(&swaybar, socket_path)) {
 		free(socket_path);
 		return 1;
 	}
 
 	free(socket_path);
-	free(bar_id);
 
 	bar_run(&swaybar);
 	bar_teardown(&swaybar);