ctl: Emit event when output is added/removed

include/ctl-commands.h

@@ -40,6 +40,8 @@ enum event_type {
 	EVT_CLIENT_CONNECTED,
 	EVT_CLIENT_DISCONNECTED,
 	EVT_DETACHED,
+	EVT_OUTPUT_ADDED,
+	EVT_OUTPUT_REMOVED,
 	EVT_UNKNOWN,
 };
 #define EVT_LIST_LEN EVT_UNKNOWN

include/ctl-server.h

@@ -89,3 +89,6 @@ void ctl_server_event_capture_changed(struct ctl*,
 		const char* captured_output);
 
 void ctl_server_event_detached(struct ctl*);
+
+void ctl_server_event_output_added(struct ctl*, const char* name);
+void ctl_server_event_output_removed(struct ctl*, const char* name);

src/ctl-commands.c

@@ -128,6 +128,20 @@ struct cmd_info ctl_event_list[] = {
 		"Sent after detaching from compositor",
 		{}
 	},
+	[EVT_OUTPUT_ADDED] = {"output-added",
+		"Sent when an output is added by the compositor",
+		{
+			{ "name", "Output name", "<string>" },
+			{}
+		}
+	},
+	[EVT_OUTPUT_REMOVED] = {"output-removed",
+		"Sent when an output is removed by the compositor",
+		{
+			{ "name", "Output name", "<string>" },
+			{}
+		}
+	},
 };
 
 enum cmd_type ctl_command_parse_name(const char* name)

src/ctl-server.c

@@ -1005,3 +1005,15 @@ void ctl_server_event_detached(struct ctl* self)
 {
 	ctl_server_enqueue_event(self, EVT_DETACHED, json_object());
 }
+
+void ctl_server_event_output_added(struct ctl* self, const char* name)
+{
+	ctl_server_enqueue_event(self, EVT_OUTPUT_ADDED,
+			json_pack("{s:s}", "name", name));
+}
+
+void ctl_server_event_output_removed(struct ctl* self, const char* name)
+{
+	ctl_server_enqueue_event(self, EVT_OUTPUT_REMOVED,
+			json_pack("{s:s}", "name", name));
+}

src/main.c

@@ -240,7 +240,10 @@ static void registry_add(void* data, struct wl_registry* registry,
 		if (!self->is_initializing) {
 			wl_display_dispatch(self->display);
 			wl_display_roundtrip(self->display);
+
+			ctl_server_event_output_added(self->ctl, output->name);
 		}
+
 		return;
 	}
 
@@ -322,6 +325,8 @@ static void registry_remove(void* data, struct wl_registry* registry,
 		} else
 			nvnc_log(NVNC_LOG_INFO, "Output %s went away", out->name);
 
+		ctl_server_event_output_removed(self->ctl, out->name);
+
 		wl_list_remove(&out->link);
 		output_destroy(out);