WebSockets: add record state support to surface

libs/surfaces/websockets/dispatcher.cc

@@ -54,6 +54,7 @@ void
 WebsocketsDispatcher::update_all_nodes (Client client)
 {
 	update (client, Node::transport_roll, globals ().transport_roll ());
+	update (client, Node::record_state, globals ().record_state ());
 	update (client, Node::tempo, globals ().tempo ());
 
 	for (uint32_t strip_n = 0; strip_n < strips ().strip_count (); ++strip_n) {

libs/surfaces/websockets/feedback.cc

@@ -39,7 +39,7 @@ struct TransportObserver {
 struct RecordStateObserver {
 	void operator() (ArdourFeedback* p)
 	{
-		// TO DO
+		p->update_all (Node::record_state, p->globals ().record_state ());
 	}
 };
 

libs/surfaces/websockets/globals.cc

@@ -37,6 +37,20 @@ ArdourGlobals::set_transport_roll (bool value)
 	}
 }
 
+bool
+ArdourGlobals::record_state () const
+{
+	return static_cast<bool>(session ().get_record_enabled ());
+}
+
+void
+ArdourGlobals::set_record_state (bool value)
+{
+	if ((value && !record_state ()) || (!value && record_state ())) {
+		basic_ui ().rec_enable_toggle ();
+	}
+}
+
 double
 ArdourGlobals::tempo () const
 {

libs/surfaces/websockets/globals.h

@@ -31,6 +31,9 @@ public:
 	bool transport_roll () const;
 	void set_transport_roll (bool);
 
+	bool record_state () const;
+	void set_record_state (bool);
+
 	double tempo () const;
 	void   set_tempo (double);
 };