lily/include/translator-group.hh

   1 /*
   2   translator-group.hh -- declare Translator_group
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #ifndef TRANSLATOR_GROUP_HH
  10 #define TRANSLATOR_GROUP_HH
  11
  12 #include "translator.hh"
  13 #include "parray.hh"
  14
  15 typedef void (Translator:: *Translator_method) (void);
  16 typedef void (Translator_group:: *Translator_group_method) (void);
  17 typedef void (*Translator_group_void_method) (Translator_group *);
  18
  19 struct Translator_method_binding
  20 {
  21   Translator *translator_;
  22   Translator_void_method_ptr method_;
  23
  24   Translator_method_binding ()
  25   {
  26   }
  27   Translator_method_binding (Translator *tr, Translator_void_method_ptr ptr)
  28   {
  29     translator_ = tr;
  30     method_ = ptr;
  31   }
  32   void invoke ()
  33   {
  34     if (method_)
  35       (*method_) (translator_);
  36   }
  37 };
  38
  39 class Translator_group
  40 {
  41 private:
  42   void precompute_method_bindings ();
  43   Array<Translator_method_binding>
  44   precomputed_method_bindings_[TRANSLATOR_METHOD_PRECOMPUTE_COUNT];
  45
  46   Translator_group_void_method
  47   precomputed_self_method_bindings_[TRANSLATOR_METHOD_PRECOMPUTE_COUNT];
  48
  49 public:
  50   VIRTUAL_COPY_CONSTRUCTOR (Translator_group, Translator_group);
  51   DECLARE_SMOBS (Translator_group, dummy);
  52
  53 public:
  54   virtual Translator_group *get_daddy_translator ()const;
  55   virtual SCM get_simple_trans_list ();
  56   virtual bool try_music (Music *req);
  57   virtual void initialize ();
  58   virtual void finalize ();
  59
  60   void stop_translation_timestep ();
  61   void start_translation_timestep ();
  62
  63   virtual void fetch_precomputable_methods (Translator_group_void_method[]);
  64
  65   Translator_group ();
  66
  67   void precomputed_translator_foreach (Translator_precompute_index);
  68   void call_precomputed_self_method (Translator_precompute_index);
  69
  70   Context *context () const { return context_; }
  71 protected:
  72   SCM simple_trans_list_;
  73   SCM accept_hash_table_;
  74   Context *context_;
  75
  76   friend class Context_def;
  77   virtual void derived_mark () const;
  78 };
  79
  80 SCM names_to_translators (SCM namelist, Context *tg);
  81 void recurse_over_translators (Context *c, Translator_method ptr,
  82                                Translator_group_method ptr2, Direction);
  83 void precomputed_recurse_over_translators (Context *c, Translator_precompute_index idx, Direction dir);
  84 Translator_group *get_translator_group (SCM sym);
  85
  86 #define foobar
  87 #define ADD_TRANSLATOR_GROUP(classname, desc, grobs, accepted, read, write) foobar
  88
  89 DECLARE_UNSMOB (Translator_group, translator_group);
  90
  91 #endif // TRANSLATOR_GROUP_HH