don't propagate broadcasts

stepmania/src/ActorFrame.cpp

@@ -390,6 +390,10 @@ void ActorFrame::HandleMessage( const Message &msg )
 {
 	Actor::HandleMessage( msg );
 
+	/* Don't propagate broadcasts.  They'll receive it directly if they're subscribed. */
+	if( msg.IsBroadcast() )
+		return;
+
 	for( unsigned i=0; i<m_SubActors.size(); i++ ) 
 	{
 		Actor* pActor = m_SubActors[i];

stepmania/src/MessageManager.cpp

@@ -91,11 +91,13 @@ Message::Message( const RString &s )
 {
 	m_sName = s;
 	m_pParams = new LuaTable;
+	m_bBroadcast = false;
 }
 
 Message::Message( const RString &s, const LuaReference &params )
 {
 	m_sName = s;
+	m_bBroadcast = false;
 	Lua *L = LUA->Get();
 	m_pParams = new LuaTable; // XXX: creates an extra table
 	params.PushSelf( L );
@@ -187,8 +189,10 @@ void MessageManager::Unsubscribe( IMessageSubscriber* pSubscriber, MessageID m )
 	Unsubscribe( pSubscriber, MessageIDToString(m) );
 }
 
-void MessageManager::Broadcast( const Message &msg ) const
+void MessageManager::Broadcast( Message &msg ) const
 {
+	msg.SetBroadcast(true);
+
 	LockMut(g_Mutex);
 
 	map<RString,SubscribersSet>::const_iterator iter = g_MessageToSubscribers.find( msg.GetName() );
@@ -205,7 +209,8 @@ void MessageManager::Broadcast( const Message &msg ) const
 void MessageManager::Broadcast( const RString& sMessage ) const
 {
 	ASSERT( !sMessage.empty() );
-	Broadcast( Message(sMessage) );
+	Message msg(sMessage);
+	Broadcast( msg );
 }
 
 void MessageManager::Broadcast( MessageID m ) const

stepmania/src/MessageManager.h

@@ -88,6 +88,9 @@ struct Message
 	~Message();
 	RString GetName() const { return m_sName; }
 
+	bool IsBroadcast() const { return m_bBroadcast; }
+	void SetBroadcast( bool b ) { m_bBroadcast = b; }
+
 	void PushParamTable( lua_State *L );
 	const LuaReference &GetParamTable() const;
 	void SetParamTable( const LuaReference &params );
@@ -120,6 +123,7 @@ struct Message
 private:
 	RString m_sName;
 	LuaTable *m_pParams;
+	bool m_bBroadcast;
 };
 
 class IMessageSubscriber
@@ -162,7 +166,7 @@ public:
 	void Subscribe( IMessageSubscriber* pSubscriber, MessageID m );
 	void Unsubscribe( IMessageSubscriber* pSubscriber, const RString& sMessage );
 	void Unsubscribe( IMessageSubscriber* pSubscriber, MessageID m );
-	void Broadcast( const Message &msg ) const;
+	void Broadcast( Message &msg ) const;
 	void Broadcast( const RString& sMessage ) const;
 	void Broadcast( MessageID m ) const;