lily/music-output-def.cc

   1 /*
   2   music-output-def.cc -- implement Music_output_def
   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 #include "scm-hash.hh"
  10
  11 #include "warn.hh"
  12 #include "music-output-def.hh"
  13 #include "global-translator.hh"
  14 #include "translator-def.hh"
  15 #include "main.hh"
  16 #include "file-path.hh"
  17 #include "lily-guile.hh"
  18 #include "ly-modules.hh"
  19
  20 #include "ly-smobs.icc"
  21
  22 Music_output_def::Music_output_def ()
  23 {
  24   scaled_fonts_ = SCM_EOL;
  25   translator_tab_ = new Scheme_hash_table;
  26   scope_ = SCM_EOL;
  27   smobify_self ();
  28   scm_gc_unprotect_object (translator_tab_->self_scm ());
  29
  30   scope_ =   ly_make_anonymous_module();
  31 }
  32
  33
  34
  35 Music_output_def::~Music_output_def ()
  36 {
  37 }
  38
  39 Music_output_def::Music_output_def (Music_output_def const &s)
  40 {
  41   scope_ = SCM_EOL;
  42   translator_tab_ = new Scheme_hash_table (*s.translator_tab_);
  43
  44   scaled_fonts_ = SCM_EOL;
  45
  46   smobify_self ();
  47   scm_gc_unprotect_object (translator_tab_->self_scm ());
  48
  49   scaled_fonts_ = scm_list_copy (s.scaled_fonts_);
  50
  51   scope_= ly_make_anonymous_module ();
  52   if (ly_module_p (s.scope_))
  53     ly_copy_module_variables (scope_, s.scope_);
  54 }
  55
  56
  57 IMPLEMENT_SMOBS (Music_output_def);
  58 IMPLEMENT_DEFAULT_EQUAL_P (Music_output_def);
  59
  60 SCM
  61 Music_output_def::mark_smob (SCM m)
  62 {
  63   Music_output_def * mo = (Music_output_def*) SCM_CELL_WORD_1 (m);
  64   scm_gc_mark (mo->translator_tab_->self_scm ());
  65   scm_gc_mark (mo->scope_);
  66
  67   return mo->scaled_fonts_;
  68 }
  69
  70 void
  71 Music_output_def::assign_translator (SCM transdef)
  72 {
  73   Translator_def *tp = unsmob_translator_def (transdef);
  74   assert (tp);
  75
  76   translator_tab_->set (tp->get_context_name (), transdef);
  77
  78   String nm = ly_symbol2string (tp->get_context_name ()) + "Context";
  79
  80
  81   scm_module_define (scope_, ly_symbol2scm (nm.to_str0()), transdef);
  82 }
  83
  84 /*
  85   find the translator for NAME. NAME must be a symbol.
  86  */
  87 SCM
  88 Music_output_def::find_translator (SCM name) const
  89 {
  90   SCM val  =SCM_EOL;
  91   translator_tab_->try_retrieve (name, &val);
  92   return val;
  93 }
  94
  95
  96 Global_translator *
  97 Music_output_def::get_global_translator ()
  98 {
  99   SCM key = ly_symbol2scm ("Score");
 100   Translator_def * t = unsmob_translator_def (find_translator (key));
 101
 102   if (!t)
 103     error (_f ("can't find `%s' context", "Score"));
 104
 105   Translator_group * tg = t->instantiate (this, SCM_EOL);
 106
 107   tg->initialize ();
 108
 109   return dynamic_cast <Global_translator *> (tg);
 110 }
 111
 112 int
 113 Music_output_def::print_smob (SCM s, SCM p, scm_print_state *)
 114 {
 115   Music_output_def * def = unsmob_music_output_def (s);
 116   scm_puts ("#<Music_output_def ", p);
 117   (void)def;
 118   scm_puts (">", p);
 119   return 1;
 120 }
 121
 122
 123 SCM
 124 Music_output_def::get_scmvar (String s) const
 125 {
 126   return lookup_variable (ly_symbol2scm (s.to_str0 ()));
 127 }
 128
 129
 130 void
 131 Music_output_def::set_variable (SCM sym, SCM val)
 132 {
 133   scm_module_define (scope_, sym, val);
 134 }
 135
 136 SCM
 137 Music_output_def::lookup_variable (SCM sym) const
 138 {
 139   SCM var = ly_module_lookup (scope_, sym);
 140
 141   return scm_variable_ref (var);
 142 }
 143
 144 LY_DEFINE(ly_paper_lookup,
 145           "ly:paper-lookup",
 146           2, 0,0,
 147           (SCM pap, SCM sym),
 148           "Lookup @var{sym} in @var{pap}. Return the value "
 149           " or '() if undefined.  "
 150           )
 151 {
 152   Music_output_def *op = unsmob_music_output_def (pap);
 153   SCM_ASSERT_TYPE (op, pap, SCM_ARG1, __FUNCTION__, "Paper");
 154   SCM_ASSERT_TYPE (gh_symbol_p (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
 155
 156   SCM v = op->lookup_variable (sym);
 157
 158   if (SCM_VARIABLEP(v))
 159     return SCM_VARIABLE_REF(v);
 160   else
 161     return SCM_EOL;
 162 }