lily/translator-def.cc

   1 /*
   2   translator-def.cc --  implement Translator_def
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "lily-proto.hh"
  11 #include "translator-def.hh"
  12 #include "translator-group.hh"
  13 #include "warn.hh"
  14 #include "music-output-def.hh"
  15 #include "ly-smobs.icc"
  16
  17 int
  18 Translator_def::print_smob (SCM smob, SCM port, scm_print_state*)
  19 {
  20   Translator_def* me = (Translator_def*) SCM_CELL_WORD_1 (smob);
  21
  22   scm_puts ("#<Translator_def ", port);
  23   scm_display (me->context_name_, port);
  24   scm_puts (">", port);
  25   return 1;
  26 }
  27
  28
  29 SCM
  30 Translator_def::mark_smob (SCM smob)
  31 {
  32   Translator_def* me = (Translator_def*) SCM_CELL_WORD_1 (smob);
  33
  34   scm_gc_mark (me->description_);
  35   scm_gc_mark (me->context_aliases_);
  36   scm_gc_mark (me->accept_mods_);
  37   scm_gc_mark (me->translator_mods_);
  38   scm_gc_mark (me->property_ops_);
  39   scm_gc_mark (me->translator_group_type_);
  40   return me->context_name_;
  41 }
  42
  43
  44 Translator_def::Translator_def ()
  45 {
  46   context_aliases_ = SCM_EOL;
  47   translator_group_type_ = SCM_EOL;
  48   accept_mods_ = SCM_EOL;
  49   translator_mods_ = SCM_EOL;
  50   property_ops_ = SCM_EOL;
  51   context_name_ = SCM_EOL;
  52   description_ = SCM_EOL;
  53
  54   smobify_self();
  55 }
  56
  57 Translator_def::~Translator_def ()
  58 {
  59 }
  60
  61 Translator_def::Translator_def (Translator_def const & s)
  62   : Input (s)
  63 {
  64   context_aliases_ = SCM_EOL;
  65   translator_group_type_ = SCM_EOL;
  66   accept_mods_ = SCM_EOL;
  67   translator_mods_ = SCM_EOL;
  68   property_ops_ = SCM_EOL;
  69   context_name_ = SCM_EOL;
  70   description_ = SCM_EOL;
  71
  72   smobify_self();
  73   description_ = s.description_;
  74
  75   accept_mods_ = s.accept_mods_;
  76   property_ops_ = s.property_ops_;
  77   translator_mods_ = s.translator_mods_;
  78   context_aliases_ = s.context_aliases_;
  79   translator_group_type_ = s.translator_group_type_;
  80   context_name_ = s.context_name_;
  81 }
  82
  83
  84 void
  85 Translator_def::add_context_mod (SCM mod)
  86 {
  87   SCM tag  = gh_car (mod);
  88   if (ly_symbol2scm ("description")  == tag)
  89     {
  90       description_ = gh_cadr (mod);
  91       return ;
  92     }
  93
  94   SCM sym = gh_cadr (mod);
  95   if (gh_string_p (sym))
  96     sym = scm_string_to_symbol (sym);
  97
  98   if (ly_symbol2scm ("consists") == tag
  99       || ly_symbol2scm ("consists-end") == tag
 100       || ly_symbol2scm ("remove") == tag)
 101     {
 102       if (!get_translator (sym))
 103         error (_f ("Program has no such type: `%s'", ly_symbol2string (sym).to_str0 ()));
 104       else
 105         translator_mods_ = gh_cons (scm_list_2 (tag, sym), translator_mods_ );
 106     }
 107   else if (ly_symbol2scm ("accepts") == tag
 108            || ly_symbol2scm ("denies") == tag)
 109     {
 110       accept_mods_ = gh_cons (scm_list_2 (tag, sym), accept_mods_);
 111     }
 112   else if (ly_symbol2scm ("poppush") == tag
 113            || ly_symbol2scm ("pop") == tag
 114            || ly_symbol2scm ("push") == tag
 115            || ly_symbol2scm ("assign") == tag
 116            || ly_symbol2scm ("unset") == tag)
 117     {
 118       property_ops_ = gh_cons (mod, property_ops_);
 119     }
 120   else if (ly_symbol2scm ("alias") == tag)
 121     {
 122       context_aliases_ = gh_cons (sym, context_aliases_);
 123     }
 124   else if (ly_symbol2scm ("translator-type")  == tag)
 125     {
 126       translator_group_type_ = sym;
 127     }
 128   else if (ly_symbol2scm ("context-name")  == tag)
 129     {
 130       context_name_ = sym;
 131     }
 132   else
 133     {
 134       programming_error ("Unknown context mod tag.");
 135     }
 136 }
 137
 138
 139
 140 SCM
 141 Translator_def::get_context_name () const
 142 {
 143   return context_name_;
 144 }
 145
 146 SCM
 147 Translator_def::get_accepted () const
 148 {
 149   SCM correct_order = scm_reverse (accept_mods_);
 150   SCM acc = SCM_EOL;
 151   for (SCM s = correct_order; gh_pair_p (s); s = gh_cdr (s))
 152     {
 153       SCM tag = gh_caar (s);
 154       SCM sym = gh_cadar (s);
 155       if (tag == ly_symbol2scm ("accepts"))
 156         acc = gh_cons (sym, acc);
 157       else if (tag == ly_symbol2scm ("denies"))
 158         acc = scm_delete_x (sym, acc);
 159     }
 160   return acc;
 161 }
 162
 163
 164 Link_array<Translator_def>
 165 Translator_def::path_to_acceptable_translator (SCM type_sym, Music_output_def* odef) const
 166 {
 167   assert (gh_symbol_p (type_sym));
 168
 169   SCM accepted = get_accepted ();
 170
 171   Link_array<Translator_def> accepteds;
 172   for (SCM s = accepted; gh_pair_p (s); s = ly_cdr (s))
 173     {
 174       Translator_def *t = unsmob_translator_def (odef->find_translator (ly_car (s)));
 175       if (!t)
 176         continue;
 177       accepteds.push (t);
 178     }
 179
 180   Link_array<Translator_def> best_result;
 181   for (int i=0; i < accepteds.size (); i++)
 182     {
 183       /*
 184         don't check aliases, because \context Staff should not create RhythmicStaff.
 185       */
 186       if (gh_equal_p (accepteds[i]->get_context_name (), type_sym))
 187         {
 188           best_result.push (accepteds[i]);
 189           return best_result;
 190         }
 191     }
 192
 193   int best_depth= INT_MAX;
 194   for (int i=0; i < accepteds.size (); i++)
 195     {
 196       Translator_def * g = accepteds[i];
 197
 198       Link_array<Translator_def> result
 199         = g->path_to_acceptable_translator (type_sym, odef);
 200       if (result.size () && result.size () < best_depth)
 201         {
 202           result.insert (g,0);
 203           best_result = result;
 204
 205           /*
 206             this following line was added in 1.9.3, but hsould've been
 207             there all along... Let's hope it doesn't cause nightmares.
 208            */
 209           best_depth = result.size();
 210         }
 211     }
 212
 213   return best_result;
 214 }
 215
 216 IMPLEMENT_SMOBS (Translator_def);
 217 IMPLEMENT_DEFAULT_EQUAL_P (Translator_def);
 218
 219
 220 static SCM
 221 names_to_translators (SCM namelist, Translator_group*tg)
 222 {
 223   SCM l = SCM_EOL;
 224   for (SCM s = namelist; gh_pair_p (s) ; s = ly_cdr (s))
 225     {
 226       Translator * t = get_translator (ly_car (s));
 227       if (!t)
 228         warning (_f ("can't find: `%s'", s));
 229       else
 230         {
 231           Translator * tr = t->clone ();
 232           SCM str = tr->self_scm ();
 233           l = gh_cons (str, l);
 234
 235           tr->daddy_trans_ = tg;
 236           tr->output_def_  = tg->output_def_;
 237
 238           scm_gc_unprotect_object (str);
 239         }
 240     }
 241   return l;
 242 }
 243
 244
 245 SCM
 246 Translator_def::get_translator_names (SCM user_mod) const
 247 {
 248   SCM l1 = SCM_EOL;
 249   SCM l2 = SCM_EOL;
 250
 251   SCM mods = scm_reverse_x (scm_list_copy (translator_mods_),
 252                             user_mod);
 253
 254   for (SCM s = mods; gh_pair_p (s); s = gh_cdr (s))
 255     {
 256       SCM tag = gh_caar (s);
 257       SCM arg = gh_cadar (s);
 258
 259       if (gh_string_p (arg))
 260         arg = scm_string_to_symbol (arg);
 261
 262       if (ly_symbol2scm ("consists") == tag)
 263         l1 = gh_cons (arg, l1);
 264       else if (ly_symbol2scm ("consists-end") == tag)
 265         l2 = gh_cons (arg, l2);
 266       else if (ly_symbol2scm ("remove") == tag)
 267         {
 268           l1 = scm_delete_x (arg, l1);
 269           l2 = scm_delete_x (arg, l2);
 270         }
 271     }
 272
 273   return scm_append_x (scm_list_2 (l1, l2));
 274 }
 275
 276
 277 Translator_group *
 278 Translator_def::instantiate (Music_output_def* md, SCM ops)
 279 {
 280   Translator * g = get_translator (translator_group_type_);
 281   g = g->clone ();
 282
 283   Translator_group *tg = dynamic_cast<Translator_group*> (g);
 284   tg->output_def_ = md;
 285   tg->definition_ = self_scm ();
 286
 287   SCM trans_names = get_translator_names (ops);
 288   tg->simple_trans_list_ = names_to_translators (trans_names, tg);
 289
 290   return tg;
 291 }
 292
 293 SCM
 294 Translator_def::clone_scm () const
 295 {
 296   Translator_def * t = new Translator_def (*this);
 297   scm_gc_unprotect_object (t->self_scm());
 298   return t->self_scm();
 299 }
 300
 301 SCM
 302 Translator_def::make_scm ()
 303 {
 304   Translator_def* t = new Translator_def;
 305   scm_gc_unprotect_object (t->self_scm());
 306   return t->self_scm();
 307 }
 308
 309
 310 /*
 311   Default child context as a SCM string, or something else if there is
 312   none.
 313 */
 314 SCM
 315 Translator_def::default_child_context_name ()
 316 {
 317   SCM d = get_accepted ();
 318   return gh_pair_p (d) ? ly_car (scm_last_pair (d)) : SCM_EOL;
 319 }
 320 void
 321 Translator_def::apply_default_property_operations (Translator_group *tg)
 322 {
 323   apply_property_operations (tg , property_ops_);
 324 }
 325
 326 SCM
 327 Translator_def::to_alist () const
 328 {
 329   SCM l = SCM_EOL;
 330
 331   l = gh_cons (gh_cons (ly_symbol2scm ("consists"),
 332                         get_translator_names (SCM_EOL)), l);
 333   l = gh_cons (gh_cons (ly_symbol2scm ("description"),  description_), l);
 334   l = gh_cons (gh_cons (ly_symbol2scm ("aliases"),  context_aliases_), l);
 335   l = gh_cons (gh_cons (ly_symbol2scm ("accepts"),  get_accepted ()), l);
 336   l = gh_cons (gh_cons (ly_symbol2scm ("property-ops"),  property_ops_), l);
 337   l = gh_cons (gh_cons (ly_symbol2scm ("context-name"),  context_name_), l);
 338   l = gh_cons (gh_cons (ly_symbol2scm ("group-type"),  translator_group_type_), l);
 339
 340   return l;
 341 }
 342
 343 bool
 344 Translator_def::is_alias (SCM sym) const
 345 {
 346   bool b  = sym == context_name_;
 347
 348   for (SCM a = context_aliases_; !b && gh_pair_p (a); a = ly_cdr (a))
 349     b = b || sym == ly_car (a);
 350
 351   return b;
 352 }