lily/translator-scheme.cc

   1 /*
   2 translator-scheme.cc --  implement
   3
   4 source file of the GNU LilyPond music typesetter
   5
   6 (c) 2002--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "translator.hh"
  11 #include "translator-def.hh"
  12
  13 #include "translator-group.hh"
  14 #include "lily-guile.hh"
  15
  16 LY_DEFINE(ly_get_context_property,
  17           "ly:get-context-property", 2, 0, 0,
  18           (SCM context, SCM name),
  19           "retrieve the value of @var{name} from context @var{context}")
  20 {
  21   Translator *t = unsmob_translator (context);
  22   Translator_group* tr=   dynamic_cast<Translator_group*> (t);
  23   SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Translator group");
  24   SCM_ASSERT_TYPE(gh_symbol_p (name), name, SCM_ARG2, __FUNCTION__, "symbol");
  25
  26   return tr->internal_get_property (name);
  27
  28 }
  29
  30 LY_DEFINE(ly_set_context_property,
  31           "ly:set-context-property", 3, 0, 0,
  32           (SCM context, SCM name, SCM val),
  33           "set value of property @var{name} in context @var{context} to @var{val}.")
  34 {
  35   Translator *t = unsmob_translator (context);
  36   Translator_group* tr=   dynamic_cast<Translator_group*> (t);
  37
  38   SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Context");
  39   tr->internal_set_property (name, val);
  40
  41   return SCM_UNSPECIFIED;
  42 }
  43
  44
  45 LY_DEFINE(ly_context_parent,
  46           "ly:context-parent", 1, 0, 0,
  47           (SCM context),
  48           "Return the parent of @var{context}, #f if none.")
  49 {
  50   Translator *t = unsmob_translator (context);
  51   Translator_group* tr=   dynamic_cast<Translator_group*> (t);
  52
  53   SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Context");
  54
  55   tr =  tr->daddy_trans_ ;
  56   if (tr)
  57     return tr->self_scm();
  58   else
  59     return SCM_BOOL_F;
  60 }
  61
  62
  63
  64 LY_DEFINE(ly_context_properties,
  65           "ly:context-properties", 1, 0, 0,
  66           (SCM context),
  67           "Return all properties  of @var{context} in an alist.")
  68 {
  69   Translator *t = unsmob_translator (context);
  70   Translator_group* tr=   dynamic_cast<Translator_group*> (t);
  71
  72   SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Context");
  73
  74   return tr->properties_as_alist ();
  75 }
  76
  77
  78
  79 LY_DEFINE(ly_translator_name,
  80           "ly:translator-name", 1,0,0,  (SCM trans),
  81           "Return the type name of the translator @var{trans}.")
  82 {
  83   Translator* tr =  unsmob_translator (trans);
  84   SCM_ASSERT_TYPE(tr, trans, SCM_ARG1, __FUNCTION__, "Context");
  85
  86   char const* nm = classname (tr);
  87   return scm_makfrom0str (nm);
  88 }
  89
  90 LY_DEFINE(ly_translator_description,
  91           "ly:translator-description",
  92           1,0,0, (SCM me),
  93           "Return an alist of properties of  translator @var{me}.")
  94 {
  95   Translator *tr =unsmob_translator (me);
  96   SCM_ASSERT_TYPE (tr, me, SCM_ARG1, __FUNCTION__, "Context");
  97
  98   return tr->translator_description ();
  99 }
 100
 101
 102 int
 103 Translator::print_smob (SCM s, SCM port, scm_print_state *)
 104 {
 105   Translator *sc = (Translator *) ly_cdr (s);
 106
 107   scm_puts ("#<Translator ", port);
 108   if (Translator_def *d=unsmob_translator_def (sc->definition_))
 109     {
 110       scm_display (d->type_name_, port);
 111     }
 112   else
 113     scm_display (ly_translator_name (s), port);
 114
 115   scm_display (sc->simple_trans_list_, port);
 116
 117   /*
 118     don't try to print properties, that is too much hassle.
 119    */
 120   scm_puts (" >", port);
 121
 122   return 1;
 123 }