* lily/accidental-placement.cc (calc_positioning_done): don't

[lilypond.git] / lily / include / translator.hh

diff --git a/lily/include/translator.hh b/lily/include/translator.hh
index 442942932112066b514cf3be7985e74aff22a18f..871b87a95dd3cad5729f5eac3ead83850efe7998 100644 (file)
--- a/lily/include/translator.hh
+++ b/lily/include/translator.hh
@@ -16,6 +16,7 @@
 #include "input.hh"
 #include "smobs.hh"
 #include "std-vector.hh"
+#include "protected-scm.hh"
 
 struct Acknowledge_information
 {
@@ -23,7 +24,21 @@ struct Acknowledge_information
   Engraver_void_function_engraver_grob_info function_;
 };
 
+
+/*
+  Each translator class has a static list of listener records. Each
+  record makes one explains how to register one of the class's stream event
+  listeners to a context.
+*/
+typedef struct translator_listener_record {
+  Listener (*get_listener_) (void *);
+  SCM event_class_;
+  struct translator_listener_record *next_;
+} translator_listener_record;
+
 #define TRANSLATOR_DECLARATIONS(NAME)                                  \
+private:                                                               \
+  static translator_listener_record *listener_list_;                   \
   public:                                                              \
   NAME ();                                                             \
   VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME);                         \
@@ -42,8 +57,21 @@ struct Acknowledge_information
   } \
   static Engraver_void_function_engraver_grob_info static_get_acknowledger (SCM sym); \
   static Engraver_void_function_engraver_grob_info static_get_end_acknowledger(SCM); \
+public:                                                                        \
+  virtual translator_listener_record *get_listener_list () const       \
+  {                                                                    \
+    return listener_list_;                                             \
+  }                                                                    \
   /* end #define */
 
+#define DECLARE_TRANSLATOR_LISTENER(m)                 \
+public:                                                        \
+inline void listen_ ## m (Stream_event *);             \
+/* Should be private */                                        \
+static void _internal_declare_ ## m ();                        \
+private:                                               \
+static Listener _get_ ## m ## _listener (void *);      \
+DECLARE_LISTENER (_listen_scm_ ## m);
 
 #define DECLARE_ACKNOWLEDGER(x) public : void acknowledge_ ## x (Grob_info); protected:
 #define DECLARE_END_ACKNOWLEDGER(x) public : void acknowledge_end_ ## x (Grob_info); protected:
@@ -84,6 +112,10 @@ public:
   virtual void initialize ();
   virtual void finalize ();
 
+  /*should maybe be virtual*/
+  void connect_to_context (Context *c);
+  void disconnect_from_context (Context *c);
+
   void stop_translation_timestep ();
   void start_translation_timestep ();
   void process_music ();
@@ -97,12 +129,15 @@ public:
 
 protected:                     // should be private.
   Context *daddy_context_;
+  void protect_event (SCM ev);
   virtual void derived_mark () const;
+  static void add_translator_listener (translator_listener_record **listener_list, translator_listener_record *r, Listener (*get_listener) (void *), const char *ev_class);
 
   friend class Translator_group;
 };
 void add_translator (Translator *trans);
 
 Translator *get_translator (SCM s);
+Moment get_event_length (Stream_event *s);
 DECLARE_UNSMOB (Translator, translator);
 #endif // TRANSLATOR_HH