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 void
  93 print_alist (SCM a, SCM port)
  94 {
  95   for (SCM s = a; gh_pair_p (s); s = gh_cdr (s))
  96     {
  97       scm_display (gh_caar (s), port);
  98       scm_puts (" = ", port);
  99       scm_write (gh_cdar (s), port);
 100       scm_puts ("\n", port);
 101     }
 102 }
 103
 104 int
 105 Music::print_smob (SCM s, SCM p, scm_print_state*)
 106 {
 107   scm_puts ("#<Music ", p);
 108   Music* m = unsmob_music (s);
 109   scm_puts (classname (m),p);
 110
 111   print_alist (m->mutable_property_alist_, p);
 112   print_alist (m->immutable_property_alist_, p);
 113
 114   scm_puts (">",p);
 115   return 1;
 116 }
 117
 118 Pitch
 119 Music::to_relative_octave (Pitch m)
 120 {
 121   return m;
 122 }
 123
 124
 125 void
 126 Music::transpose (Pitch)
 127 {
 128 }
 129
 130 IMPLEMENT_TYPE_P (Music, "music?");
 131 IMPLEMENT_UNSMOB (Music,music);
 132 IMPLEMENT_SMOBS (Music);
 133 IMPLEMENT_DEFAULT_EQUAL_P (Music);
 134
 135 /****************************/
 136
 137 SCM
 138 Music::get_mus_property (const char *nm) const
 139 {
 140   SCM sym = ly_symbol2scm (nm);
 141   return get_mus_property (sym);
 142 }
 143
 144 SCM
 145 Music::get_mus_property (SCM sym) const
 146 {
 147   SCM s = scm_sloppy_assq (sym, mutable_property_alist_);
 148   if (s != SCM_BOOL_F)
 149     return gh_cdr (s);
 150
 151   s = scm_sloppy_assq (sym, immutable_property_alist_);
 152   return (s == SCM_BOOL_F) ? SCM_EOL : gh_cdr (s);
 153 }
 154
 155 /*
 156   Remove the value associated with KEY, and return it. The result is
 157   that a next call will yield SCM_EOL (and not the underlying
 158   `basic' property.
 159 */
 160 SCM
 161 Music::remove_mus_property (const char* key)
 162 {
 163   SCM val = get_mus_property (key);
 164   if (val != SCM_EOL)
 165     set_mus_property (key, SCM_EOL);
 166   return val;
 167 }
 168
 169 void
 170 Music::set_mus_property (const char* k, SCM v)
 171 {
 172   SCM s = ly_symbol2scm (k);
 173   set_mus_property (s, v);
 174 }
 175
 176 void
 177 Music::set_immutable_mus_property (const char*k, SCM v)
 178 {
 179   SCM s = ly_symbol2scm (k);
 180   set_immutable_mus_property (s, v);
 181 }
 182
 183 void
 184 Music::set_immutable_mus_property (SCM s, SCM v)
 185 {
 186   immutable_property_alist_ = gh_cons (gh_cons (s,v), mutable_property_alist_);
 187   mutable_property_alist_ = scm_assq_remove_x (mutable_property_alist_, s);
 188 }
 189 void
 190 Music::set_mus_property (SCM s, SCM v)
 191 {
 192   mutable_property_alist_ = scm_assq_set_x (mutable_property_alist_, s, v);
 193 }
 194
 195 #include "main.hh"
 196
 197 void
 198 Music::set_spot (Input ip)
 199 {
 200   set_mus_property ("origin", make_input (ip));
 201 }
 202
 203
 204
 205 Input*
 206 Music::origin () const
 207 {
 208   Input *ip = unsmob_input (get_mus_property ("origin"));
 209   return ip ? ip : & dummy_input_global;
 210 }
 211
 212
 213
 214
 215
 216 Music::~Music ()
 217 {
 218
 219 }
 220
 221 SCM
 222 ly_get_mus_property (SCM mus, SCM sym)
 223 {
 224   Music * sc = unsmob_music (mus);
 225
 226   if (sc)
 227     {
 228       return sc->get_mus_property (sym);
 229     }
 230   else
 231     {
 232       warning (_ ("ly_get_mus_property (): Not a Music"));
 233       scm_write (mus, scm_current_error_port ());
 234     }
 235   return SCM_EOL;
 236 }
 237
 238
 239 SCM
 240 ly_set_mus_property (SCM mus, SCM sym, SCM val)
 241 {
 242   Music * sc = unsmob_music (mus);
 243
 244   if (!gh_symbol_p (sym))
 245     {
 246       warning (_ ("ly_set_mus_property (): Not a symbol"));
 247       scm_write (mus, scm_current_error_port ());
 248
 249       return SCM_UNSPECIFIED;
 250     }
 251
 252   if (sc)
 253     {
 254       sc->set_mus_property (sym, val);
 255     }
 256   else
 257     {
 258       warning (_ ("ly_set_mus_property ():  not of type Music"));
 259       scm_write (mus, scm_current_error_port ());
 260     }
 261
 262   return SCM_UNSPECIFIED;
 263 }
 264
 265
 266 // to do  property args
 267 SCM
 268 ly_make_music (SCM type)
 269 {
 270   if (!gh_string_p (type))
 271     {
 272       warning (_ ("ly_make_music (): Not a string"));
 273       scm_write (type, scm_current_error_port ());
 274
 275       return SCM_UNSPECIFIED;
 276     }
 277   else
 278     {
 279       SCM s =       get_music (ly_scm2string (type))->self_scm ();
 280       scm_unprotect_object (s);
 281       return s;
 282     }
 283 }
 284
 285 SCM
 286 ly_music_name (SCM mus)
 287 {
 288   Music * m = unsmob_music (mus);
 289   const char *nm ="";
 290   if (!m)
 291     {
 292       warning (_ ("ly_music_name (): Not a music expression"));
 293       scm_write (mus, scm_current_error_port ());
 294     }
 295    else
 296      nm = classname (m);
 297    return ly_str02scm (nm);
 298 }
 299
 300 static void
 301 init_functions ()
 302 {
 303   scm_make_gsubr ("ly-get-mus-property", 2, 0, 0, (Scheme_function_unknown)ly_get_mus_property);
 304   scm_make_gsubr ("ly-set-mus-property", 3, 0, 0, (Scheme_function_unknown)ly_set_mus_property);
 305   scm_make_gsubr ("ly-make-music", 1, 0, 0, (Scheme_function_unknown)ly_make_music);
 306   scm_make_gsubr ("ly-music-name", 1, 0, 0, (Scheme_function_unknown)ly_music_name);
 307 }
 308 ADD_SCM_INIT_FUNC (musicscm,init_functions);
 309 ADD_MUSIC(Music);