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--2004 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-context.hh"
  14 #include "context-def.hh"
  15 #include "main.hh"
  16 #include "file-path.hh"
  17 #include "lily-guile.hh"
  18 #include "ly-module.hh"
  19
  20 #include "ly-smobs.icc"
  21
  22 Music_output_def::Music_output_def ()
  23 {
  24   translator_tab_ = new Scheme_hash_table;
  25   scope_ = SCM_EOL;
  26   smobify_self ();
  27
  28   scm_gc_unprotect_object (translator_tab_->self_scm ());
  29   scope_ = ly_make_anonymous_module ();
  30 }
  31
  32 Music_output_def::~Music_output_def ()
  33 {
  34 }
  35
  36 Music_output_def::Music_output_def (Music_output_def const &s)
  37 {
  38   scope_ = SCM_EOL;
  39   translator_tab_ = 0;
  40   smobify_self ();
  41
  42   translator_tab_ =   new Scheme_hash_table (*s.translator_tab_);
  43   scm_gc_unprotect_object (translator_tab_->self_scm ());
  44
  45   scope_= ly_make_anonymous_module ();
  46   if (ly_module_p (s.scope_))
  47     ly_import_module (scope_, s.scope_);
  48 }
  49
  50
  51 IMPLEMENT_SMOBS (Music_output_def);
  52 IMPLEMENT_DEFAULT_EQUAL_P (Music_output_def);
  53
  54 SCM
  55 Music_output_def::mark_smob (SCM m)
  56 {
  57   Music_output_def * mo = (Music_output_def*) SCM_CELL_WORD_1 (m);
  58   if (mo->translator_tab_)
  59     scm_gc_mark (mo->translator_tab_->self_scm ());
  60
  61   mo->derived_mark ();
  62
  63   return mo->scope_;
  64 }
  65
  66 void
  67 Music_output_def::derived_mark ()
  68 {
  69
  70 }
  71
  72 void
  73 Music_output_def::assign_context_def (SCM transdef)
  74 {
  75   Context_def *tp = unsmob_context_def (transdef);
  76   assert (tp);
  77
  78   translator_tab_->set (tp->get_context_name (), transdef);
  79
  80   String nm = ly_symbol2string (tp->get_context_name ()) + "Context";
  81
  82
  83   scm_module_define (scope_, ly_symbol2scm (nm.to_str0 ()), transdef);
  84 }
  85
  86 /*
  87   find the translator for NAME. NAME must be a symbol.
  88 */
  89 SCM
  90 Music_output_def::find_context_def (SCM name) const
  91 {
  92   SCM val  =SCM_EOL;
  93   translator_tab_->try_retrieve (name, &val);
  94   return val;
  95 }
  96
  97 int
  98 Music_output_def::print_smob (SCM s, SCM p, scm_print_state *)
  99 {
 100   Music_output_def * def = unsmob_music_output_def (s);
 101   scm_puts ("#< ", p);
 102   scm_puts (classname (def), p);
 103
 104   (void)def;
 105   scm_puts (">", p);
 106   return 1;
 107 }
 108
 109 SCM
 110 Music_output_def::get_scmvar (String s) const
 111 {
 112   return lookup_variable (ly_symbol2scm (s.to_str0 ()));
 113 }
 114
 115 void
 116 Music_output_def::set_variable (SCM sym, SCM val)
 117 {
 118   scm_module_define (scope_, sym, val);
 119 }
 120
 121 SCM
 122 Music_output_def::lookup_variable (SCM sym) const
 123 {
 124   SCM var = ly_module_lookup (scope_, sym);
 125
 126   return scm_variable_ref (var);
 127 }
 128
 129 LY_DEFINE (ly_paper_lookup, "ly:paper-lookup",
 130            2, 0,0, (SCM pap, SCM sym),
 131            "Lookup @var{sym} in @var{pap}. "
 132            "Return the value or @code{'()} if undefined.")
 133 {
 134   Music_output_def *op = unsmob_music_output_def (pap);
 135   SCM_ASSERT_TYPE (op, pap, SCM_ARG1, __FUNCTION__, "Paper");
 136   SCM_ASSERT_TYPE (ly_symbol_p (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
 137
 138   SCM var = ly_module_lookup (op->scope_, sym);
 139   if (SCM_VARIABLEP (var))
 140     return SCM_VARIABLE_REF (var);
 141   else
 142     return SCM_EOL;
 143 }
 144
 145 LY_DEFINE (ly_output_def_scope, "ly:output-def-scope",
 146            1, 0,0, (SCM def),
 147            "Get the variable scope inside @var{def}.")
 148 {
 149   Music_output_def *op = unsmob_music_output_def (def);
 150   SCM_ASSERT_TYPE (op, def, SCM_ARG1, __FUNCTION__, "Output definition");
 151   return op->scope_;
 152 }
 153
 154 LY_DEFINE (ly_output_def_clone, "ly:output-def-clone",
 155            1, 0, 0, (SCM def),
 156            "Clone @var{def}.")
 157 {
 158   Music_output_def *op = unsmob_music_output_def (def);
 159   SCM_ASSERT_TYPE (op, def, SCM_ARG1, __FUNCTION__, "Output definition");
 160   SCM s = op->clone ()->self_scm ();
 161   scm_gc_unprotect_object (s);
 162   return s;
 163 }
 164