lily/include/translator.hh

   1 /*
   2   translator.hh -- declare Translator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9
  10 #ifndef TRANSLATOR_HH
  11 #define TRANSLATOR_HH
  12
  13 #include "global-ctor.hh"
  14 #include "string.hh"
  15 #include "lily-proto.hh"
  16 #include "virtual-methods.hh"
  17 #include "lily-guile.hh"
  18 #include "input.hh"
  19 #include "smobs.hh"
  20
  21 #define get_property(x) internal_get_property(ly_symbol2scm(x))
  22
  23
  24 #define TRANSLATOR_DECLARATIONS(NAME)                   \
  25 public:                                                 \
  26   NAME();\
  27   VIRTUAL_COPY_CONS (Translator);                               \
  28   static SCM static_description_;                       \
  29   virtual SCM static_translator_description () const;   \
  30   virtual SCM translator_description () const;
  31
  32 /*
  33   Translate music into grobs.
  34 */
  35 class Translator
  36 {
  37   void init ();
  38 public:
  39   Music_output_def * output_def_;
  40
  41   bool is_alias_b (SCM) const;
  42   Translator (Translator const &);
  43
  44
  45   Translator_group * daddy_trans_ ;
  46   void removal_processing ();
  47   /**
  48     ask daddy for a feature
  49     */
  50   Music_output_def *get_output_def () const;
  51
  52   SCM internal_get_property (SCM symbol) const;
  53
  54   virtual Moment now_mom () const;
  55
  56   /*
  57     ugh: bubbled up from Translator_group.
  58    */
  59   SCM simple_trans_list_;
  60   SCM trans_group_list_;
  61   SCM definition_;
  62   SCM properties_scm_;
  63   DECLARE_SMOBS (Translator, dummy);
  64
  65
  66 public:
  67   Global_translator * top_translator () const;
  68   TRANSLATOR_DECLARATIONS(Translator);
  69   virtual bool try_music (Music *req);
  70   virtual void stop_translation_timestep ();
  71   virtual void start_translation_timestep ();
  72   virtual void do_announces () ;
  73   virtual void initialize () ;
  74   virtual void finalize ();
  75 };
  76
  77
  78 /**
  79   A macro to automate administration of translators.
  80  */
  81 #define ADD_THIS_TRANSLATOR(T)                          \
  82 SCM T::static_description_ = SCM_EOL;\
  83 static void  _ ## T ## _adder () {\
  84       T *t = new T;\
  85       T::static_description_ = t->static_translator_description ();\
  86       scm_permanent_object (T::static_description_);\
  87       add_translator (t);\
  88 }\
  89 SCM T::translator_description() const\
  90 { \
  91   return static_description_;\
  92 }\
  93 ADD_GLOBAL_CTOR (_ ## T ## _adder);
  94
  95
  96
  97
  98 #define ENTER_DESCRIPTION(classname,desc,grobs,accepted,acked,read,write)                                               \
  99 ADD_THIS_TRANSLATOR (classname);\
 100 SCM                                                                                             \
 101 classname::static_translator_description () const \
 102 {                                                                                               \
 103   SCM  static_properties= SCM_EOL;                                                              \
 104   /*  static_properties= acons (name ,gh_str02scm (Translator::name (self_scm ())),             \
 105                               static_properties_);                                              \
 106   */                                                                                            \
 107   static_properties= scm_acons (ly_symbol2scm ("grobs-created"),                                \
 108                               parse_symbol_list (grobs), static_properties);    \
 109                                                                                                 \
 110   static_properties= scm_acons (ly_symbol2scm ("description"),                                  \
 111                               scm_makfrom0str (desc), static_properties);                               \
 112                                                                                                 \
 113   static_properties= scm_acons (ly_symbol2scm ("interfaces-acked"),                             \
 114                               parse_symbol_list (acked), static_properties);                    \
 115   static_properties= scm_acons (ly_symbol2scm ("events-accepted"),                              \
 116                               parse_symbol_list (accepted), static_properties);                 \
 117                                                                                                 \
 118   static_properties= scm_acons (ly_symbol2scm ("properties-read"),                              \
 119                               parse_symbol_list (read), static_properties);                     \
 120                                                                                                 \
 121   static_properties= scm_acons (ly_symbol2scm ("properties-written"),                           \
 122                                 parse_symbol_list (write), static_properties);                  \
 123                                                                                                 \
 124   return static_properties;                                                                     \
 125 }
 126
 127
 128
 129 void add_translator (Translator*trans);
 130
 131 Translator*get_translator (String s);
 132 DECLARE_UNSMOB(Translator,translator);
 133 #endif // TRANSLATOR_HH