WebSockets: add transport roll support to surface

libs/surfaces/websockets/component.cc

@@ -19,6 +19,12 @@
 #include "component.h"
 #include "ardour_websockets.h"
 
+BasicUI&
+SurfaceComponent::basic_ui () const
+{
+	return _surface;
+}
+
 PBD::EventLoop*
 SurfaceComponent::event_loop () const
 {

libs/surfaces/websockets/component.h

@@ -19,6 +19,8 @@
 #ifndef _ardour_surface_websockets_component_h_
 #define _ardour_surface_websockets_component_h_
 
+#include "control_protocol/basic_ui.h"
+
 #include <glibmm.h>
 
 #include "ardour/session.h"
@@ -51,6 +53,7 @@ public:
 		return 0;
 	}
 
+	BasicUI&                     basic_ui () const;
 	PBD::EventLoop*              event_loop () const;
 	Glib::RefPtr<Glib::MainLoop> main_loop () const;
 	ARDOUR::Session&             session () const;

libs/surfaces/websockets/dispatcher.cc

@@ -53,6 +53,7 @@ WebsocketsDispatcher::dispatch (Client client, const NodeStateMessage& msg)
 void
 WebsocketsDispatcher::update_all_nodes (Client client)
 {
+	update (client, Node::transport_roll, globals ().transport_roll ());
 	update (client, Node::tempo, globals ().tempo ());
 
 	for (uint32_t strip_n = 0; strip_n < strips ().strip_count (); ++strip_n) {

libs/surfaces/websockets/feedback.cc

@@ -29,6 +29,20 @@
 
 using namespace ARDOUR;
 
+struct TransportObserver {
+	void operator() (ArdourFeedback* p)
+	{
+		p->update_all (Node::transport_roll, p->globals ().transport_roll ());
+	}
+};
+
+struct RecordStateObserver {
+	void operator() (ArdourFeedback* p)
+	{
+		// TO DO
+	}
+};
+
 struct TempoObserver {
 	void operator() (ArdourFeedback* p)
 	{
@@ -162,7 +176,12 @@ ArdourFeedback::poll () const
 void
 ArdourFeedback::observe_globals ()
 {
-	session ().tempo_map ().PropertyChanged.connect (_signal_connections, MISSING_INVALIDATOR,
+	ARDOUR::Session& sess = session ();
+	sess.TransportStateChange.connect (_signal_connections, MISSING_INVALIDATOR,
+	                                   boost::bind<void> (TransportObserver (), this), event_loop ());
+	sess.RecordStateChanged.connect (_signal_connections, MISSING_INVALIDATOR,
+	                                 boost::bind<void> (RecordStateObserver (), this), event_loop ());
+	sess.tempo_map ().PropertyChanged.connect (_signal_connections, MISSING_INVALIDATOR,
 	                                 boost::bind<void> (TempoObserver (), this), event_loop ());
 }
 

libs/surfaces/websockets/globals.cc

@@ -22,6 +22,21 @@
 
 using namespace ARDOUR;
 
+bool
+ArdourGlobals::transport_roll () const
+{
+	return static_cast<bool>(basic_ui ().transport_rolling ());
+}
+
+void
+ArdourGlobals::set_transport_roll (bool value)
+{
+	if ((value && !transport_roll ()) || (!value && transport_roll ())) {
+		// this call is equivalent to hitting the spacebar
+		basic_ui ().toggle_roll ();
+	}
+}
+
 double
 ArdourGlobals::tempo () const
 {

libs/surfaces/websockets/globals.h

@@ -28,6 +28,9 @@ public:
 	    : SurfaceComponent (surface){};
 	virtual ~ArdourGlobals (){};
 
+	bool transport_roll () const;
+	void set_transport_roll (bool);
+
 	double tempo () const;
 	void   set_tempo (double);
 };

libs/surfaces/websockets/state.h

@@ -32,6 +32,8 @@
 namespace Node
 {
 	const std::string tempo                    = "tempo";
+	const std::string transport_roll           = "transport_roll";
+	const std::string record_state             = "record_state";
 	const std::string strip_desc               = "strip_desc";
 	const std::string strip_meter              = "strip_meter";
 	const std::string strip_gain               = "strip_gain";