lily/line-of-score.cc

   1 /*
   2   scoreline.cc -- implement Line_of_score
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "input-smob.hh"
  10 #include "axis-group-interface.hh"
  11 #include "debug.hh"
  12 #include "line-of-score.hh"
  13 #include "main.hh"
  14 #include "paper-column.hh"
  15 #include "paper-def.hh"
  16 #include "paper-outputter.hh"
  17 #include "paper-score.hh"
  18 #include "string.hh"
  19 #include "warn.hh"
  20 #include "dimensions.hh"
  21 #include "molecule.hh"
  22 #include "all-font-metrics.hh"
  23
  24 // todo: use map.
  25 void
  26 fixup_refpoints (SCM s)
  27 {
  28   for (; gh_pair_p (s); s = gh_cdr (s))
  29     {
  30       Grob::fixup_refpoint (gh_car (s));
  31     }
  32 }
  33
  34
  35 Line_of_score::Line_of_score (SCM s)
  36   : Spanner (s)
  37 {
  38   rank_i_ = 0;
  39
  40   Axis_group_interface::set_interface (this);
  41   Axis_group_interface::set_axes (this, Y_AXIS,X_AXIS);
  42 }
  43
  44 int
  45 Line_of_score::element_count () const
  46 {
  47   return scm_ilength (get_grob_property ("all-elements"));
  48 }
  49
  50 void
  51 Line_of_score::typeset_grob (Grob * elem_p)
  52 {
  53   elem_p->pscore_l_ = pscore_l_;
  54   Pointer_group_interface::add_element (this, "all-elements",elem_p);
  55   scm_unprotect_object (elem_p->self_scm ());
  56 }
  57
  58 void
  59 Line_of_score::output_lines ()
  60 {
  61   for (SCM s = get_grob_property ("all-elements");
  62        gh_pair_p (s); s = gh_cdr (s))
  63     {
  64       unsmob_grob (gh_car (s))->do_break_processing ();
  65     }
  66   /*
  67     fixups must be done in broken line_of_scores, because new elements
  68     are put over there.  */
  69   int count = 0;
  70   for (int i=0; i < broken_into_l_arr_.size (); i++)
  71     {
  72       Grob *se = broken_into_l_arr_[i];
  73       SCM all = se->get_grob_property ("all-elements");
  74       for (SCM s = all; gh_pair_p (s); s = gh_cdr (s))
  75         {
  76           fixup_refpoint (gh_car (s));
  77         }
  78       count += scm_ilength (all);
  79     }
  80
  81
  82   /*
  83     needed for doing items.
  84    */
  85   fixup_refpoints (get_grob_property ("all-elements"));
  86
  87
  88   for (SCM s = get_grob_property ("all-elements");
  89        gh_pair_p (s); s = gh_cdr (s))
  90     {
  91       unsmob_grob (gh_car (s))->handle_broken_dependencies ();
  92     }
  93   handle_broken_dependencies ();
  94
  95   if (verbose_global_b)
  96     progress_indication (_f ("Element count %d.",  count + element_count ()));
  97
  98
  99   for (int i=0; i < broken_into_l_arr_.size (); i++)
 100     {
 101       Line_of_score *line_l = dynamic_cast<Line_of_score*> (broken_into_l_arr_[i]);
 102
 103       if (verbose_global_b)
 104         progress_indication ("[");
 105       line_l->post_processing (i+1 == broken_into_l_arr_.size ());
 106
 107       if (verbose_global_b)
 108         {
 109           progress_indication (to_str (i));
 110           progress_indication ("]");
 111         }
 112
 113       if (i < broken_into_l_arr_.size () - 1)
 114         {
 115           SCM lastcol =  gh_car (line_l->get_grob_property ("columns"));
 116           Grob*  e = unsmob_grob (lastcol);
 117           SCM inter = e->get_grob_property ("between-system-string");
 118           if (gh_string_p (inter))
 119             {
 120               pscore_l_->outputter_l_->output_string (inter);
 121             }
 122         }
 123     }
 124 }
 125
 126 // const?
 127 void
 128 Line_of_score::break_into_pieces (Array<Column_x_positions> const &breaking)
 129 {
 130   for (int i=0; i < breaking.size (); i++)
 131     {
 132       Line_of_score *line_l = dynamic_cast <Line_of_score*> (clone ());
 133       line_l->rank_i_ = i;
 134       //      line_l->set_immutable_grob_property ("rank", gh_int2scm (i));
 135       Link_array<Grob> c (breaking[i].cols_);
 136       pscore_l_->typeset_line (line_l);
 137
 138       line_l->set_bound (LEFT,c[0]);
 139       line_l->set_bound (RIGHT,c.top ());
 140       for (int j=0; j < c.size (); j++)
 141         {
 142           c[j]->translate_axis (breaking[i].config_[j],X_AXIS);
 143           dynamic_cast<Paper_column*> (c[j])->line_l_ = line_l;
 144         }
 145
 146       broken_into_l_arr_.push (line_l);
 147     }
 148 }
 149
 150
 151 #define GLOBAL_SYMBOL(cname, name)  \
 152 SCM cname ;                                     \
 153 void \
 154 cname ## _init_func ()                          \
 155 {                                               \
 156   cname = ly_symbol2scm (name);                 \
 157   scm_permanent_object (cname);                 \
 158 }                                               \
 159 ADD_SCM_INIT_FUNC (cname,cname ## _init_func);\
 160
 161
 162 GLOBAL_SYMBOL (offset_sym , "translate-molecule");
 163 GLOBAL_SYMBOL (placebox_sym , "placebox");
 164 GLOBAL_SYMBOL (combine_sym , "combine-molecule");
 165 GLOBAL_SYMBOL (no_origin_sym , "no-origin");
 166 GLOBAL_SYMBOL (define_origin_sym , "define-origin");
 167
 168
 169
 170 void
 171 Line_of_score::output_molecule (SCM expr, Offset o)
 172 {
 173
 174   while (1)
 175     {
 176       if (!gh_pair_p (expr))
 177         return;
 178
 179       SCM head =gh_car (expr);
 180       if (unsmob_input (head))
 181         {
 182           Input * ip = unsmob_input (head);
 183
 184
 185           pscore_l_->outputter_l_->output_scheme (gh_list (define_origin_sym,
 186                                                            ly_str02scm (ip->file_str ().ch_C ()),
 187                                                            gh_int2scm (ip->line_number ()),
 188                                                            gh_int2scm (ip->column_number ()),
 189                                                            SCM_UNDEFINED));
 190           expr = gh_cadr (expr);
 191         }
 192       else  if (head ==  no_origin_sym)
 193         {
 194           pscore_l_->outputter_l_->output_scheme (gh_list (no_origin_sym, SCM_UNDEFINED));
 195           expr = gh_cadr (expr);
 196         }
 197       else if (head == offset_sym)
 198         {
 199           o += ly_scm2offset (gh_cadr (expr));
 200           expr = gh_caddr (expr);
 201         }
 202       else if (head == combine_sym)
 203         {
 204           output_molecule (gh_cadr (expr), o);
 205           expr = gh_caddr (expr);
 206         }
 207       else
 208         {
 209           pscore_l_->outputter_l_->
 210             output_scheme (gh_list (placebox_sym,
 211                                     gh_double2scm (o[X_AXIS]),
 212                                     gh_double2scm (o[Y_AXIS]),
 213                                     expr,
 214                                     SCM_UNDEFINED));
 215
 216           return;
 217         }
 218     }
 219 }
 220
 221 void
 222 Line_of_score::output_scheme (SCM s)
 223 {
 224   pscore_l_->outputter_l_->output_scheme (s);
 225 }
 226
 227 void
 228 Line_of_score::add_column (Paper_column*p)
 229 {
 230   Grob *me = this;
 231   SCM cs = me->get_grob_property ("columns");
 232   Grob * prev =  gh_pair_p (cs) ? unsmob_grob (gh_car (cs)) : 0;
 233
 234   p->rank_i_ = prev ? Paper_column::rank_i (prev) + 1 : 0;
 235
 236   me->set_grob_property ("columns",  gh_cons (p->self_scm (), cs));
 237
 238   Axis_group_interface::add_element (me, p);
 239 }
 240
 241
 242
 243 /*
 244   TODO: use scm_map iso. for loops.
 245  */
 246 void
 247 Line_of_score::pre_processing ()
 248 {
 249   for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = gh_cdr (s))
 250     unsmob_grob (gh_car (s))->discretionary_processing ();
 251
 252   if (verbose_global_b)
 253     progress_indication (_f ("Element count %d ",  element_count ()));
 254
 255
 256   for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = gh_cdr (s))
 257     unsmob_grob (gh_car (s))->handle_prebroken_dependencies ();
 258
 259   fixup_refpoints (get_grob_property ("all-elements"));
 260
 261   for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = gh_cdr (s))
 262     {
 263       Grob* sc = unsmob_grob (gh_car (s));
 264       sc->calculate_dependencies (PRECALCED, PRECALCING, ly_symbol2scm ("before-line-breaking-callback"));
 265     }
 266
 267   progress_indication ("\n" + _ ("Calculating column positions...") + " ");
 268   for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = gh_cdr (s))
 269     {
 270       Grob * e = unsmob_grob (gh_car (s));
 271       SCM proc = e->get_grob_property ("spacing-procedure");
 272       if (gh_procedure_p (proc))
 273         gh_call1 (proc, e->self_scm ());
 274     }
 275 }
 276
 277 void
 278 Line_of_score::post_processing (bool last_line)
 279 {
 280   for (SCM s = get_grob_property ("all-elements");
 281        gh_pair_p (s); s = gh_cdr (s))
 282     {
 283       Grob* sc = unsmob_grob (gh_car (s));
 284       sc->calculate_dependencies (POSTCALCED, POSTCALCING,
 285                                   ly_symbol2scm ("after-line-breaking-callback"));
 286     }
 287
 288   Interval i (extent (this, Y_AXIS));
 289   if (i.empty_b ())
 290     programming_error ("Huh?  Empty Line_of_score?");
 291   else
 292     translate_axis (- i[MAX], Y_AXIS);
 293
 294   Real height = i.length ();
 295   if (height > 50 CM)
 296     {
 297       programming_error ("Improbable system height");
 298       height = 50 CM;
 299     }
 300
 301   /*
 302     generate all molecules  to trigger all font loads.
 303
 304  (ugh. This is not very memory efficient.)  */
 305   for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = gh_cdr (s))
 306     {
 307       unsmob_grob (gh_car (s))->get_molecule ();
 308     }
 309   /*
 310     font defs;
 311    */
 312   SCM font_names = ly_quote_scm (paper_l ()->font_descriptions ());
 313   output_scheme (gh_list (ly_symbol2scm ("define-fonts"),
 314                                         font_names,
 315                                         SCM_UNDEFINED));
 316
 317   /*
 318     line preamble.
 319    */
 320   output_scheme (gh_list (ly_symbol2scm ("start-line"),
 321                           gh_double2scm (height),
 322                           SCM_UNDEFINED));
 323
 324   /* Output elements in three layers, 0, 1, 2.
 325      The default layer is 1. */
 326   for (int i = 0; i < 3; i++)
 327     for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s);
 328          s = gh_cdr (s))
 329       {
 330         Grob *sc = unsmob_grob (gh_car (s));
 331         Molecule *m = sc->get_molecule ();
 332         if (!m)
 333           continue;
 334
 335         SCM s = sc->get_grob_property ("layer");
 336         int layer = gh_number_p (s) ? gh_scm2int (s) : 1;
 337         if (layer != i)
 338           continue;
 339
 340         Offset o (sc->relative_coordinate (this, X_AXIS),
 341                   sc->relative_coordinate (this, Y_AXIS));
 342
 343         SCM e = sc->get_grob_property ("extra-offset");
 344         if (gh_pair_p (e))
 345           {
 346             o[X_AXIS] += gh_scm2double (gh_car (e));
 347             o[Y_AXIS] += gh_scm2double (gh_cdr (e));
 348           }
 349
 350         output_molecule (m->get_expr (), o);
 351       }
 352
 353   if (last_line)
 354     {
 355       output_scheme (gh_list (ly_symbol2scm ("stop-last-line"), SCM_UNDEFINED));
 356     }
 357   else
 358     {
 359       output_scheme (gh_list (ly_symbol2scm ("stop-line"), SCM_UNDEFINED));
 360     }
 361 }
 362
 363
 364 Link_array<Item>
 365 Line_of_score::broken_col_range (Item const*l, Item const*r) const
 366 {
 367   Link_array<Item> ret;
 368
 369   l = l->column_l ();
 370   r = r->column_l ();
 371   SCM s = get_grob_property ("columns");
 372
 373   while (gh_pair_p (s) && gh_car (s) != r->self_scm ())
 374     s = gh_cdr (s);
 375
 376   if (gh_pair_p (s))
 377     s = gh_cdr (s);
 378
 379   while (gh_pair_p (s) && gh_car (s) != l->self_scm ())
 380     {
 381       Paper_column*c = dynamic_cast<Paper_column*> (unsmob_grob (gh_car (s)));
 382       if (Item::breakable_b (c) && !c->line_l_)
 383         ret.push (c);
 384
 385       s = gh_cdr (s);
 386     }
 387
 388   ret.reverse ();
 389   return ret;
 390 }
 391
 392 /**
 393    Return all columns, but filter out any unused columns , since they might
 394    disrupt the spacing problem.
 395  */
 396 Link_array<Grob>
 397 Line_of_score::column_l_arr ()const
 398 {
 399   Link_array<Grob> acs
 400     = Pointer_group_interface__extract_elements (this, (Grob*) 0, "columns");
 401   bool bfound = false;
 402   for (int i= acs.size (); i -- ;)
 403     {
 404       bool brb = Item::breakable_b (acs[i]);
 405       bfound = bfound || brb;
 406
 407       /*
 408         the last column should be breakable. Weed out any columns that
 409         seem empty. We need to retain breakable columns, in case
 410         someone forced a breakpoint.
 411       */
 412       if (!bfound || !Paper_column::used_b (acs[i]))
 413         acs.del (i);
 414     }
 415   return acs;
 416 }
 417