Issue 1375/2: Create Translator_creator class

[lilypond.git] / lily / include / scheme-engraver.hh

diff --git a/lily/include/scheme-engraver.hh b/lily/include/scheme-engraver.hh
index 73eff6d576b8e5ecd6362e5c62800df8ec60f718..79e01a7e1de3a243cce7674c8966fb88e090309b 100644 (file)
--- a/lily/include/scheme-engraver.hh
+++ b/lily/include/scheme-engraver.hh
@@ -1,9 +1,9 @@
-/* 
+/*
   scheme-engraver.hh -- declare Scheme_engraver
-  
+
   source file of the GNU LilyPond music typesetter
-  
-  Copyright (c) 2009 Han-Wen Nienhuys <hanwen@lilypond.org>
+
+  Copyright (c) 2009--2015 Han-Wen Nienhuys <hanwen@lilypond.org>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -16,8 +16,7 @@
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
-  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.  
-  
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #ifndef SCHEME_ENGRAVER_HH
@@ -25,55 +24,44 @@
 
 #include "engraver.hh"
 
-class Scheme_engraver : public Engraver {
+struct Preinit_Scheme_engraver {
+  SCM initialize_function_;
+  SCM finalize_function_;
+  SCM precomputable_methods_ [TRANSLATOR_METHOD_PRECOMPUTE_COUNT];
+
+  // hashq table of interface-symbol -> scheme-function
+  Drul_array<SCM> interface_acknowledger_hash_;
+
+  // Alist of listened-symbol . scheme-function
+  SCM per_instance_listeners_;
+  Preinit_Scheme_engraver ();
+};
+
+class Scheme_engraver : Preinit_Scheme_engraver, public Engraver
+{
 public:
-  void init_from_scheme (SCM definition);
-  TRANSLATOR_DECLARATIONS_NO_LISTENER (Scheme_engraver);
-  
-  static Listener get_listener (void *generic_arg, SCM event);
-  
+  TRANSLATOR_FAMILY_DECLARATIONS (Scheme_engraver);
+  Scheme_engraver (SCM definition, Context *c);
+
 protected:
   ~Scheme_engraver ();
-  
-  void stop_translation_timestep ();
-  void start_translation_timestep ();
-  void process_music ();
-  void process_acknowledged ();
 
   virtual void initialize ();
   virtual void finalize ();
   virtual void derived_mark () const;
-  virtual translator_listener_record *get_listener_list () const;
+  virtual SCM get_listener_list () const;
   virtual bool must_be_last () const;
 
 private:
-  void acknowledge_grob_by_hash (Grob_info info, SCM iface_function_hash);
-  void init_acknowledgers (SCM alist, SCM *hash);
+  virtual SCM get_acknowledger (SCM sym, Direction start_end)
+  {
+    return generic_get_acknowledger
+      (sym, interface_acknowledger_hash_[start_end]);
+  }
 
-  DECLARE_ACKNOWLEDGER (grob);
-  DECLARE_END_ACKNOWLEDGER (grob);
+  SCM init_acknowledgers (SCM alist);
 
   bool must_be_last_;
-  
-  SCM acknowledge_grob_function_;
-  SCM stop_translation_timestep_function_;
-  SCM start_translation_timestep_function_;
-  SCM process_music_function_;
-  SCM process_acknowledged_function_;
-  SCM initialize_function_;
-  SCM finalize_function_;
-
-  // hashq table of interface-symbol -> scheme-function
-  SCM interface_acknowledger_hash_;
-  SCM interface_end_acknowledger_hash_;
-
-  // Alist of listened-symbol . scheme-function
-  SCM listeners_alist_;
-
-  // We dont use this, but need it for the documentation boilerplate.
-  static translator_listener_record *listener_list_;
-  translator_listener_record *per_instance_listeners_;
 };
 
 #endif /* SCHEME_ENGRAVER_HH */
-