From 8eb3b9d34b862822fbc670458a247bc74c975289 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Wed, 9 Aug 2017 14:09:27 +0200
Subject: Add a Lua SetSession signal/hook

---
 gtk2_ardour/luainstance.cc   | 9 ++++++++-
 gtk2_ardour/luainstance.h    | 1 +
 gtk2_ardour/luasignal_syms.h | 3 +++
 libs/ardour/luabindings.cc   | 2 +-
 4 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/gtk2_ardour/luainstance.cc b/gtk2_ardour/luainstance.cc
index 12958e1de6..bf18683c1d 100644
--- a/gtk2_ardour/luainstance.cc
+++ b/gtk2_ardour/luainstance.cc
@@ -377,6 +377,7 @@ namespace LuaMixer {
 using namespace ARDOUR;
 
 PBD::Signal0<void> LuaInstance::LuaTimerDS;
+PBD::Signal0<void> LuaInstance::SetSession;
 
 void
 LuaInstance::register_hooks (lua_State* L)
@@ -398,6 +399,10 @@ LuaInstance::register_hooks (lua_State* L)
 		.beginStdBitSet <LuaSignal::LAST_SIGNAL> ("Set")
 		.endClass()
 		.endNamespace ();
+
+#if 0 // Dump size -> libs/ardour/luabindings.cc
+	printf ("LuaInstance: registered %d signals\n", LuaSignal::LAST_SIGNAL);
+#endif
 }
 
 void
@@ -605,7 +610,6 @@ LuaInstance::register_classes (lua_State* L)
 
 	bind_cairo (L);
 	bind_dialog (L);
-	register_hooks (L);
 
 	luabridge::getGlobalNamespace (L)
 		.beginNamespace ("ArdourUI")
@@ -1110,6 +1114,7 @@ LuaInstance::init ()
 	}
 
 	register_classes (L);
+	register_hooks (L);
 
 	luabridge::push <PublicEditor *> (L, &PublicEditor::instance());
 	lua_setglobal (L, "Editor");
@@ -1129,6 +1134,7 @@ void LuaInstance::set_session (Session* s)
 		i->second->set_session (s);
 	}
 	point_one_second_connection = Timers::rapid_connect (sigc::mem_fun(*this, & LuaInstance::every_point_one_seconds));
+	SetSession (); /* EMIT SIGNAL */
 }
 
 void
@@ -1806,6 +1812,7 @@ LuaCallback::init (void)
 	}
 
 	LuaInstance::register_classes (L);
+	LuaInstance::register_hooks (L);
 
 	luabridge::push <PublicEditor *> (L, &PublicEditor::instance());
 	lua_setglobal (L, "Editor");
diff --git a/gtk2_ardour/luainstance.h b/gtk2_ardour/luainstance.h
index 8ffc1d887e..60bbca7c88 100644
--- a/gtk2_ardour/luainstance.h
+++ b/gtk2_ardour/luainstance.h
@@ -121,6 +121,7 @@ public:
 	sigc::signal<void,PBD::ID,std::string,ActionHook> SlotChanged;
 
 	static PBD::Signal0<void> LuaTimerDS; // deci-seconds (Timer every .1s)
+	static PBD::Signal0<void> SetSession; // emitted when a session is loaded
 
 private:
 	LuaInstance();
diff --git a/gtk2_ardour/luasignal_syms.h b/gtk2_ardour/luasignal_syms.h
index 9cd1af7fde..37f2624e05 100644
--- a/gtk2_ardour/luasignal_syms.h
+++ b/gtk2_ardour/luasignal_syms.h
@@ -86,6 +86,9 @@ STATIC(RegionPropertyChanged, &ARDOUR::Region::RegionPropertyChanged, 2)
 // Timers
 STATIC(LuaTimerDS, &LuaInstance::LuaTimerDS, 0)
 
+// Session load
+STATIC(SetSession, &LuaInstance::SetSession, 0)
+
 // TODO per track/route signals,
 // TODO per plugin actions / controllables
 // TODO per region actions
diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index 9bd04c480c..b37d3a39a5 100644
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -160,7 +160,7 @@ CLASSINFO(TrackSelection);
 CLASSINFO(TrackViewList);
 
 
-CLASSKEYS(std::bitset<47ul>); // LuaSignal::LAST_SIGNAL
+CLASSKEYS(std::bitset<48ul>); // LuaSignal::LAST_SIGNAL
 
 CLASSKEYS(void);
 CLASSKEYS(float);
-- 
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