lily/include/translator-group.hh

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef TRANSLATOR_GROUP_HH
  21 #define TRANSLATOR_GROUP_HH
  22
  23 #include "listener.hh"
  24 #include "translator.hh"
  25
  26 typedef void (Translator:: *Translator_method) (void);
  27 typedef void (Translator_group:: *Translator_group_method) (void);
  28 typedef void (*Translator_group_void_method) (Translator_group *);
  29
  30 struct Translator_method_binding
  31 {
  32   Translator *translator_;
  33   Translator_void_method_ptr method_;
  34
  35   Translator_method_binding ()
  36   {
  37   }
  38   Translator_method_binding (Translator *tr, Translator_void_method_ptr ptr)
  39   {
  40     translator_ = tr;
  41     method_ = ptr;
  42   }
  43   void invoke ()
  44   {
  45     if (method_)
  46       (*method_) (translator_);
  47   }
  48 };
  49
  50 class Translator_group
  51 {
  52 private:
  53   void precompute_method_bindings ();
  54   vector<Translator_method_binding>
  55   precomputed_method_bindings_[TRANSLATOR_METHOD_PRECOMPUTE_COUNT];
  56
  57   Translator_group_void_method
  58   precomputed_self_method_bindings_[TRANSLATOR_METHOD_PRECOMPUTE_COUNT];
  59
  60   SCM protected_events_;
  61
  62   DECLARE_LISTENER (create_child_translator);
  63
  64 public:
  65   VIRTUAL_COPY_CONSTRUCTOR (Translator_group, Translator_group);
  66   DECLARE_SMOBS (Translator_group);
  67
  68 public:
  69   virtual void connect_to_context (Context *c);
  70   virtual void disconnect_from_context ();
  71   virtual SCM get_simple_trans_list ();
  72   virtual void initialize ();
  73   virtual void finalize ();
  74
  75   void protect_event (SCM ev);
  76
  77   void stop_translation_timestep ();
  78   void start_translation_timestep ();
  79
  80   virtual void fetch_precomputable_methods (Translator_group_void_method[]);
  81
  82   Translator_group ();
  83
  84   void precomputed_translator_foreach (Translator_precompute_index);
  85   void call_precomputed_self_method (Translator_precompute_index);
  86
  87   Context *context () const { return context_; }
  88 protected:
  89   SCM simple_trans_list_;
  90   Context *context_;
  91
  92   friend class Context_def;
  93   virtual void derived_mark () const;
  94 };
  95
  96 SCM names_to_translators (SCM namelist, Context *tg);
  97 void recurse_over_translators (Context *c, Translator_method ptr,
  98                                Translator_group_method ptr2, Direction);
  99 void precomputed_recurse_over_translators (Context *c, Translator_precompute_index idx, Direction dir);
 100 Translator_group *get_translator_group (SCM sym);
 101
 102 #define foobar
 103 #define ADD_TRANSLATOR_GROUP(classname, desc, grobs, read, write) foobar
 104
 105 DECLARE_UNSMOB (Translator_group, translator_group);
 106
 107 #endif // TRANSLATOR_GROUP_HH