lily/include/translator.icc

   1 /*
   2   translator.icc -- declare Translator glue wiring.
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7
   8 */
   9
  10 #ifndef TRANSLATOR_ICC
  11 #define TRANSLATOR_ICC
  12
  13 /**
  14    A macro to automate administration of translators.
  15 */
  16 #define ADD_THIS_TRANSLATOR(T)                                          \
  17   SCM T::static_description_ = SCM_EOL;                                 \
  18   static void _ ## T ## _adder ()                                       \
  19   {                                                                     \
  20     T *t = new T;                                                       \
  21     T::static_description_ = t->static_translator_description ();       \
  22     scm_permanent_object (T::static_description_);                      \
  23     add_translator (t);                                                 \
  24   }                                                                     \
  25   SCM T::translator_description () const                                \
  26   {                                                                     \
  27     return static_description_;                                         \
  28   }                                                                     \
  29   ADD_GLOBAL_CTOR (_ ## T ## _adder);
  30
  31 #define ADD_TRANSLATOR(classname, desc, grobs, accepted, acked, read, write) \
  32   IMPLEMENT_FETCH_PRECOMPUTABLE_METHODS(classname); \
  33   ADD_THIS_TRANSLATOR (classname);                                      \
  34   SCM                                                                   \
  35   classname::static_translator_description () const                     \
  36   {                                                                     \
  37     SCM static_properties = SCM_EOL;                                    \
  38     /*  static_properties = acons (name , gh_str02scm (Translator::name (self_scm ())), \
  39         static_properties_);                                            \
  40     */                                                                  \
  41     static_properties = scm_acons (ly_symbol2scm ("grobs-created"),     \
  42                                    parse_symbol_list (grobs), static_properties); \
  43                                                                         \
  44     static_properties = scm_acons (ly_symbol2scm ("description"),       \
  45                                    scm_makfrom0str (desc), static_properties); \
  46                                                                         \
  47     static_properties = scm_acons (ly_symbol2scm ("interfaces-acked"),  \
  48                                    parse_symbol_list (acked), static_properties); \
  49     static_properties = scm_acons (ly_symbol2scm ("events-accepted"),   \
  50                                    parse_symbol_list (accepted), static_properties); \
  51                                                                         \
  52     static_properties = scm_acons (ly_symbol2scm ("properties-read"),   \
  53                                    parse_symbol_list (read), static_properties); \
  54                                                                         \
  55     static_properties = scm_acons (ly_symbol2scm ("properties-written"), \
  56                                    parse_symbol_list (write), static_properties); \
  57                                                                         \
  58     return static_properties;                                           \
  59   }
  60
  61 #define IMPLEMENT_FETCH_PRECOMPUTABLE_METHODS(T) \
  62 void \
  63 T::fetch_precomputable_methods (Translator_void_method_ptr ptrs[])\
  64 {                                                                       \
  65   ptrs[START_TRANSLATION_TIMESTEP] =                                    \
  66     ((Translator_void_method_ptr) &T::start_translation_timestep == \
  67      (Translator_void_method_ptr) &Translator::start_translation_timestep)      \
  68     ? 0                                                                 \
  69     : (Translator_void_method_ptr) &T::start_translation_timestep;      \
  70                                                                         \
  71   ptrs[STOP_TRANSLATION_TIMESTEP] =                                     \
  72     ((Translator_void_method_ptr) &T::stop_translation_timestep == (Translator_void_method_ptr) &Translator::stop_translation_timestep) \
  73     ? 0                                                                 \
  74     : (Translator_void_method_ptr) &T::stop_translation_timestep;       \
  75                                                                         \
  76   ptrs[PROCESS_MUSIC] =                                                 \
  77     ((Translator_void_method_ptr) &T::process_music == (Translator_void_method_ptr) &Translator::process_music)                 \
  78     ? 0                                                                 \
  79     : (Translator_void_method_ptr) &T::process_music;           \
  80                                                                         \
  81   ptrs[PROCESS_ACKNOWLEDGED] =                                          \
  82     ((Translator_void_method_ptr) &T::process_acknowledged == (Translator_void_method_ptr) &Translator::process_acknowledged)   \
  83     ? 0                                                                 \
  84     : (Translator_void_method_ptr) &T::process_acknowledged;            \
  85 }
  86
  87
  88 #endif /* TRANSLATOR_ICC */
  89