lily/music.cc

   1 /*
   2   music.cc -- implement Music
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "input-smob.hh"
  10 #include "music.hh"
  11 #include "music-list.hh"
  12 #include "debug.hh"
  13 #include "pitch.hh"
  14 #include "ly-smobs.icc"
  15
  16 SCM
  17 ly_deep_mus_copy (SCM m)
  18 {
  19   if (unsmob_music (m))
  20     {
  21       SCM ss =  unsmob_music (m)->clone ()->self_scm ();
  22       scm_unprotect_object (ss);
  23       return ss;
  24     }
  25   else if (gh_pair_p (m))
  26     {
  27       return gh_cons (ly_deep_mus_copy (gh_car (m)), ly_deep_mus_copy (gh_cdr (m)));
  28     }
  29   else
  30     return m;
  31 }
  32
  33
  34 Music::Music ()
  35 {
  36   immutable_property_alist_ = SCM_EOL;
  37   mutable_property_alist_ = SCM_EOL;
  38   smobify_self ();
  39 }
  40
  41 Music::Music (Music const &m)
  42 {
  43   immutable_property_alist_ = m.immutable_property_alist_;
  44   SCM c =ly_deep_mus_copy (m.mutable_property_alist_);
  45   mutable_property_alist_ = c;
  46
  47   smobify_self ();
  48
  49   set_spot (*m.origin ());
  50 }
  51
  52
  53 Music::Music (SCM l)
  54 {
  55   immutable_property_alist_ = l;
  56   mutable_property_alist_ = SCM_EOL;
  57   smobify_self ();
  58 }
  59
  60
  61 SCM
  62 Music::mark_smob (SCM m)
  63 {
  64   Music * mus = (Music *)SCM_CELL_WORD_1 (m);
  65   scm_gc_mark (mus->immutable_property_alist_);
  66   scm_gc_mark (mus->mutable_property_alist_);
  67   return SCM_EOL;
  68 }
  69
  70 void
  71 Music::compress (Moment)
  72 {
  73 }
  74
  75
  76
  77 Moment
  78 Music::length_mom () const
  79 {
  80   SCM l = get_mus_property ("length");
  81   if (unsmob_moment (l))
  82     return *unsmob_moment (l);
  83   else if (gh_procedure_p (l))
  84     {
  85       SCM res = gh_call1 (l, self_scm ());
  86       return *unsmob_moment (res);
  87     }
  88
  89   return 0;
  90 }
  91
  92 Moment
  93 Music::start_mom () const
  94 {
  95   Moment m ;
  96   return m;
  97 }
  98
  99 void
 100 print_alist (SCM a, SCM port)
 101 {
 102   for (SCM s = a; gh_pair_p (s); s = gh_cdr (s))
 103     {
 104       scm_display (gh_caar (s), port);
 105       scm_puts (" = ", port);
 106       scm_write (gh_cdar (s), port);
 107       scm_puts ("\n", port);
 108     }
 109 }
 110
 111 int
 112 Music::print_smob (SCM s, SCM p, scm_print_state*)
 113 {
 114   scm_puts ("#<Music ", p);
 115   Music* m = unsmob_music (s);
 116   scm_puts (classname (m),p);
 117
 118   print_alist (m->mutable_property_alist_, p);
 119   print_alist (m->immutable_property_alist_, p);
 120
 121   scm_puts (">",p);
 122   return 1;
 123 }
 124
 125 Pitch
 126 Music::to_relative_octave (Pitch m)
 127 {
 128   return m;
 129 }
 130
 131
 132 void
 133 Music::transpose (Pitch)
 134 {
 135 }
 136
 137 IMPLEMENT_TYPE_P (Music, "music?");
 138 IMPLEMENT_UNSMOB (Music,music);
 139 IMPLEMENT_SMOBS (Music);
 140 IMPLEMENT_DEFAULT_EQUAL_P (Music);
 141
 142 /****************************/
 143
 144 SCM
 145 Music::get_mus_property (const char *nm) const
 146 {
 147   SCM sym = ly_symbol2scm (nm);
 148   return get_mus_property (sym);
 149 }
 150
 151 SCM
 152 Music::get_mus_property (SCM sym) const
 153 {
 154   SCM s = scm_sloppy_assq (sym, mutable_property_alist_);
 155   if (s != SCM_BOOL_F)
 156     return gh_cdr (s);
 157
 158   s = scm_sloppy_assq (sym, immutable_property_alist_);
 159   return (s == SCM_BOOL_F) ? SCM_EOL : gh_cdr (s);
 160 }
 161
 162 /*
 163   Remove the value associated with KEY, and return it. The result is
 164   that a next call will yield SCM_EOL (and not the underlying
 165   `basic' property.
 166 */
 167 SCM
 168 Music::remove_mus_property (const char* key)
 169 {
 170   SCM val = get_mus_property (key);
 171   if (val != SCM_EOL)
 172     set_mus_property (key, SCM_EOL);
 173   return val;
 174 }
 175
 176 void
 177 Music::set_mus_property (const char* k, SCM v)
 178 {
 179   SCM s = ly_symbol2scm (k);
 180   set_mus_property (s, v);
 181 }
 182
 183 void
 184 Music::set_immutable_mus_property (const char*k, SCM v)
 185 {
 186   SCM s = ly_symbol2scm (k);
 187   set_immutable_mus_property (s, v);
 188 }
 189
 190 void
 191 Music::set_immutable_mus_property (SCM s, SCM v)
 192 {
 193   immutable_property_alist_ = gh_cons (gh_cons (s,v), mutable_property_alist_);
 194   mutable_property_alist_ = scm_assq_remove_x (mutable_property_alist_, s);
 195 }
 196 void
 197 Music::set_mus_property (SCM s, SCM v)
 198 {
 199   mutable_property_alist_ = scm_assq_set_x (mutable_property_alist_, s, v);
 200 }
 201
 202 #include "main.hh"
 203
 204 void
 205 Music::set_spot (Input ip)
 206 {
 207   set_mus_property ("origin", make_input (ip));
 208 }
 209
 210
 211
 212 Input*
 213 Music::origin () const
 214 {
 215   Input *ip = unsmob_input (get_mus_property ("origin"));
 216   return ip ? ip : & dummy_input_global;
 217 }
 218
 219
 220
 221
 222
 223 Music::~Music ()
 224 {
 225
 226 }
 227
 228 SCM
 229 ly_get_mus_property (SCM mus, SCM sym)
 230 {
 231   Music * sc = unsmob_music (mus);
 232
 233   if (sc)
 234     {
 235       return sc->get_mus_property (sym);
 236     }
 237   else
 238     {
 239       warning (_ ("ly_get_mus_property (): Not a Music"));
 240       scm_write (mus, scm_current_error_port ());
 241     }
 242   return SCM_EOL;
 243 }
 244
 245
 246 SCM
 247 ly_set_mus_property (SCM mus, SCM sym, SCM val)
 248 {
 249   Music * sc = unsmob_music (mus);
 250
 251   if (!gh_symbol_p (sym))
 252     {
 253       warning (_ ("ly_set_mus_property (): Not a symbol"));
 254       scm_write (mus, scm_current_error_port ());
 255
 256       return SCM_UNSPECIFIED;
 257     }
 258
 259   if (sc)
 260     {
 261       sc->set_mus_property (sym, val);
 262     }
 263   else
 264     {
 265       warning (_ ("ly_set_mus_property ():  not of type Music"));
 266       scm_write (mus, scm_current_error_port ());
 267     }
 268
 269   return SCM_UNSPECIFIED;
 270 }
 271
 272
 273 // to do  property args
 274 SCM
 275 ly_make_music (SCM type)
 276 {
 277   if (!gh_string_p (type))
 278     {
 279       warning (_ ("ly_make_music (): Not a string"));
 280       scm_write (type, scm_current_error_port ());
 281
 282       return SCM_UNSPECIFIED;
 283     }
 284   else
 285     {
 286       SCM s =       get_music (ly_scm2string (type))->self_scm ();
 287       scm_unprotect_object (s);
 288       return s;
 289     }
 290 }
 291
 292 SCM
 293 ly_music_name (SCM mus)
 294 {
 295   Music * m = unsmob_music (mus);
 296   const char *nm ="";
 297   if (!m)
 298     {
 299       warning (_ ("ly_music_name (): Not a music expression"));
 300       scm_write (mus, scm_current_error_port ());
 301     }
 302    else
 303      nm = classname (m);
 304    return ly_str02scm (nm);
 305 }
 306
 307 static void
 308 init_functions ()
 309 {
 310   scm_make_gsubr ("ly-get-mus-property", 2, 0, 0, (Scheme_function_unknown)ly_get_mus_property);
 311   scm_make_gsubr ("ly-set-mus-property", 3, 0, 0, (Scheme_function_unknown)ly_set_mus_property);
 312   scm_make_gsubr ("ly-make-music", 1, 0, 0, (Scheme_function_unknown)ly_make_music);
 313   scm_make_gsubr ("ly-music-name", 1, 0, 0, (Scheme_function_unknown)ly_music_name);
 314 }
 315 ADD_SCM_INIT_FUNC (musicscm,init_functions);
 316 ADD_MUSIC(Music);