lily/system.cc

   1 /*
   2   system.cc -- implement System
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "system.hh"
  10
  11 #include <math.h>
  12
  13 #include "align-interface.hh"
  14 #include "axis-group-interface.hh"
  15 #include "warn.hh"
  16 #include "main.hh"
  17 #include "paper-column.hh"
  18 #include "output-def.hh"
  19 #include "paper-score.hh"
  20 #include "warn.hh"
  21 #include "all-font-metrics.hh"
  22 #include "spacing-interface.hh"
  23 #include "staff-symbol-referencer.hh"
  24 #include "paper-book.hh"
  25 #include "paper-system.hh"
  26 #include "tweak-registration.hh"
  27 #include "grob-array.hh"
  28 #include "pointer-group-interface.hh"
  29
  30 System::System (System const &src, int count)
  31   : Spanner (src, count)
  32 {
  33   all_elements_ = 0;
  34   rank_ = 0;
  35   init_elements ();
  36 }
  37
  38 System::System (SCM s, Object_key const *key)
  39   : Spanner (s, key)
  40 {
  41   all_elements_ = 0;
  42   rank_ = 0;
  43   init_elements ();
  44 }
  45
  46 void
  47 System::init_elements ()
  48 {
  49   SCM scm_arr = Grob_array::make_array ();
  50   all_elements_ = unsmob_grob_array (scm_arr);
  51   set_object ("all-elements", scm_arr);
  52 }
  53
  54 Grob *
  55 System::clone (int count) const
  56 {
  57   return new System (*this, count);
  58 }
  59
  60 int
  61 System::element_count () const
  62 {
  63   return all_elements_->size ();
  64 }
  65
  66 int
  67 System::spanner_count () const
  68 {
  69   int k = 0;
  70   for (int i = all_elements_->size (); i--;)
  71     if (dynamic_cast<Spanner *> (all_elements_->grob (i)))
  72       k++;
  73   return k;
  74 }
  75
  76 void
  77 System::typeset_grob (Grob *elem)
  78 {
  79   if (elem->pscore_)
  80     programming_error ("adding element twice");
  81   else
  82     {
  83       elem->pscore_ = pscore_;
  84       all_elements_->add (elem);
  85       elem->unprotect ();
  86     }
  87 }
  88
  89 void
  90 System::derived_mark () const
  91 {
  92   if (!all_elements_->is_empty ())
  93     {
  94       Grob **ptr = &all_elements_->array_reference ().elem_ref (0);
  95       Grob **end = ptr + all_elements_->size ();
  96       while (ptr < end)
  97         {
  98           scm_gc_mark ((*ptr)->self_scm ());
  99           ptr++;
 100         }
 101     }
 102
 103   if (pscore_)
 104     scm_gc_mark (pscore_->self_scm ());
 105
 106   Spanner::derived_mark ();
 107 }
 108
 109 static void
 110 fixup_refpoints (Link_array<Grob> const &grobs)
 111 {
 112   for (int i = grobs.size (); i--;)
 113     grobs[i]->fixup_refpoint ();
 114 }
 115
 116 SCM
 117 System::get_paper_systems ()
 118 {
 119   for (int i = 0; i < all_elements_->size (); i++)
 120     {
 121       Grob *g = all_elements_->grob (i);
 122       if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
 123         {
 124           /*
 125             Kill no longer needed grobs.
 126           */
 127           Item *it = dynamic_cast<Item *> (g);
 128           if (it && Item::is_breakable (it))
 129             {
 130               it->find_prebroken_piece (LEFT)->suicide ();
 131               it->find_prebroken_piece (RIGHT)->suicide ();
 132             }
 133           g->suicide ();
 134         }
 135       else if (g->is_live ())
 136         g->do_break_processing ();
 137     }
 138
 139   /*
 140     fixups must be done in broken line_of_scores, because new elements
 141     are put over there.  */
 142   int count = 0;
 143   for (int i = 0; i < broken_intos_.size (); i++)
 144     {
 145       Grob *se = broken_intos_[i];
 146
 147       extract_grob_set (se, "all-elements", all_elts);
 148       for (int j = 0; j < all_elts.size (); j++)
 149         {
 150           Grob *g = all_elts[j];
 151           g->fixup_refpoint ();
 152         }
 153
 154       count += all_elts.size ();
 155     }
 156
 157   /*
 158     needed for doing items.
 159   */
 160   fixup_refpoints (all_elements_->array ());
 161
 162   for (int i = 0; i < all_elements_->size (); i++)
 163     all_elements_->grob (i)->handle_broken_dependencies ();
 164
 165   handle_broken_dependencies ();
 166
 167 #if 0  /* FIXME: strange side effects.  */
 168
 169   /* Because the this->get_property (all-elements) contains items in 3
 170      versions, handle_broken_dependencies () will leave duplicated
 171      items in all-elements.  Strictly speaking this is harmless, but
 172      it leads to duplicated symbols in the output.  ly_list_qsort_uniq_x ()
 173      makes sure that no duplicates are in the list.  */
 174   for (int i = 0; i < line_count; i++)
 175     {
 176       SCM all = broken_intos_[i]->get_object ("all-elements");
 177       all = ly_list_qsort_uniq_x (all);
 178     }
 179 #endif
 180
 181   if (be_verbose_global)
 182     message (_f ("Element count %d.", count + element_count ()));
 183
 184   int line_count = broken_intos_.size ();
 185   SCM lines = scm_c_make_vector (line_count, SCM_EOL);
 186
 187   for (int i = 0; i < line_count; i++)
 188     {
 189       if (be_verbose_global)
 190         progress_indication ("[");
 191
 192       System *system = dynamic_cast<System *> (broken_intos_[i]);
 193       system->post_processing ();
 194       scm_vector_set_x (lines, scm_from_int (i), system->get_paper_system ());
 195
 196       if (be_verbose_global)
 197         progress_indication (to_string (i) + "]");
 198     }
 199   return lines;
 200 }
 201
 202 void
 203 System::break_into_pieces (Array<Column_x_positions> const &breaking)
 204 {
 205   for (int i = 0; i < breaking.size (); i++)
 206     {
 207       System *system = dynamic_cast<System *> (clone (i));
 208       system->rank_ = i;
 209
 210       Link_array<Grob> c (breaking[i].cols_);
 211       pscore_->typeset_system (system);
 212
 213       system->set_bound (LEFT, c[0]);
 214       system->set_bound (RIGHT, c.top ());
 215       for (int j = 0; j < c.size (); j++)
 216         {
 217           c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
 218           dynamic_cast<Paper_column *> (c[j])->system_ = system;
 219         }
 220       set_loose_columns (system, &breaking[i]);
 221       broken_intos_.push (system);
 222     }
 223 }
 224
 225 void
 226 System::add_column (Paper_column *p)
 227 {
 228   Grob *me = this;
 229   Grob_array *ga = unsmob_grob_array (me->get_object ("columns"));
 230   if (!ga)
 231     {
 232       SCM scm_ga = Grob_array::make_array ();
 233       me->set_object ("columns", scm_ga);
 234       ga = unsmob_grob_array (scm_ga);
 235     }
 236
 237   p->rank_
 238     = ga->size ()
 239     ? Paper_column::get_rank (ga->array ().top ()) + 1
 240     : 0;
 241
 242   ga->add (p);
 243   Axis_group_interface::add_element (this, p);
 244 }
 245
 246 void
 247 apply_tweaks (Grob *g, bool broken)
 248 {
 249   if (bool (g->original_) == broken)
 250     {
 251       SCM tweaks = global_registry_->get_tweaks (g);
 252       for (SCM s = tweaks; scm_is_pair (s); s = scm_cdr (s))
 253         {
 254           SCM proc = scm_caar (s);
 255           SCM rest = scm_cdar (s);
 256           scm_apply_1 (proc, g->self_scm (), rest);
 257         }
 258     }
 259 }
 260
 261 void
 262 System::pre_processing ()
 263 {
 264   for (int i = 0; i < all_elements_->size (); i++)
 265     all_elements_->grob (i)->discretionary_processing ();
 266
 267   if (be_verbose_global)
 268     message (_f ("Grob count %d", element_count ()));
 269
 270   /*
 271     order is significant: broken grobs are added to the end of the
 272     array, and should be processed before the original is potentially
 273     killed.
 274   */
 275   for (int i = all_elements_->size (); i--;)
 276     all_elements_->grob (i)->handle_prebroken_dependencies ();
 277
 278   fixup_refpoints (all_elements_->array ());
 279
 280   for (int i = 0; i < all_elements_->size (); i++)
 281     apply_tweaks (all_elements_->grob (i), false);
 282
 283   for (int i = 0; i < all_elements_->size (); i++)
 284     all_elements_->grob (i)->calculate_dependencies (PRECALCED, PRECALCING,
 285                                                      ly_symbol2scm ("before-line-breaking-callback"));
 286
 287   message (_ ("Calculating line breaks..."));
 288   progress_indication (" ");
 289
 290   for (int i = 0; i < all_elements_->size (); i++)
 291     {
 292       Grob *e = all_elements_->grob (i);
 293       SCM proc = e->get_property ("spacing-procedure");
 294       if (ly_is_procedure (proc))
 295         scm_call_1 (proc, e->self_scm ());
 296     }
 297 }
 298
 299 void
 300 System::post_processing ()
 301 {
 302   for (int i = 0; i < all_elements_->size (); i++)
 303     {
 304       Grob *g = all_elements_->grob (i);
 305
 306       apply_tweaks (g, true);
 307       g->calculate_dependencies (POSTCALCED, POSTCALCING,
 308                                  ly_symbol2scm ("after-line-breaking-callback"));
 309     }
 310
 311   Interval iv (extent (this, Y_AXIS));
 312   if (iv.is_empty ())
 313     programming_error ("system with empty extent");
 314   else
 315     translate_axis (-iv[MAX], Y_AXIS);
 316
 317   /* Generate all stencils to trigger font loads.
 318      This might seem inefficient, but Stencils are cached per grob
 319      anyway. */
 320
 321   Link_array<Grob> all_elts_sorted (all_elements_->array ());
 322   all_elts_sorted.default_sort ();
 323   all_elts_sorted.uniq ();
 324   this->get_stencil ();
 325   for (int i = all_elts_sorted.size (); i--;)
 326     {
 327       Grob *g = all_elts_sorted[i];
 328       g->get_stencil ();
 329     }
 330 }
 331
 332 SCM
 333 System::get_paper_system ()
 334 {
 335   static int const LAYER_COUNT = 3;
 336
 337   SCM exprs = SCM_EOL;
 338   SCM *tail = &exprs;
 339
 340   /* Output stencils in three layers: 0, 1, 2.  Default layer: 1. */
 341   for (int i = 0; i < LAYER_COUNT; i++)
 342     for (int j = all_elements_->size (); j--;)
 343       {
 344         Grob *g = all_elements_->grob (j);
 345         Stencil *stil = g->get_stencil ();
 346
 347         /* Skip empty stencils and grobs that are not in this layer.  */
 348         if (!stil
 349             || robust_scm2int (g->get_property ("layer"), 1) != i)
 350           continue;
 351
 352         Offset o (g->relative_coordinate (this, X_AXIS),
 353                   g->relative_coordinate (this, Y_AXIS));
 354
 355         Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
 356                                           Offset (0, 0))
 357           * Staff_symbol_referencer::staff_space (g);
 358
 359         /* Must copy the stencil, for we cannot change the stencil
 360            cached in G.  */
 361
 362         Stencil st = *stil;
 363         st.translate (o + extra);
 364
 365         *tail = scm_cons (st.expr (), SCM_EOL);
 366         tail = SCM_CDRLOC (*tail);
 367       }
 368
 369   if (Stencil *me = get_stencil ())
 370     exprs = scm_cons (me->expr (), exprs);
 371
 372   Interval x (extent (this, X_AXIS));
 373   Interval y (extent (this, Y_AXIS));
 374   Stencil sys_stencil (Box (x, y),
 375                        scm_cons (ly_symbol2scm ("combine-stencil"),
 376                                  exprs));
 377
 378   Interval staff_refpoints;
 379   staff_refpoints.set_empty ();
 380   extract_grob_set (this, "spaceable-staves", staves);
 381   for (int i = staves.size (); i--;)
 382     {
 383       Grob *g = staves[i];
 384       staff_refpoints.add_point (g->relative_coordinate (this, Y_AXIS));
 385     }
 386
 387   Paper_system *pl = new Paper_system (sys_stencil, false);
 388   pl->staff_refpoints_ = staff_refpoints;
 389   Item *break_point = this->get_bound (LEFT);
 390   pl->break_before_penalty_
 391     = robust_scm2double (break_point->get_property ("page-penalty"), 0.0);
 392
 393   return pl->unprotect ();
 394 }
 395
 396 Link_array<Item>
 397 System::broken_col_range (Item const *left, Item const *right) const
 398 {
 399   Link_array<Item> ret;
 400
 401   left = left->get_column ();
 402   right = right->get_column ();
 403
 404   extract_grob_set (this, "columns", cols);
 405   int i = 0;
 406   while (i < cols.size ()
 407          && cols[i] != left)
 408     i++;
 409
 410   if (i < cols.size ())
 411     i++;
 412
 413   while (i < cols.size ()
 414          && cols[i] != right)
 415     {
 416       Paper_column *c = dynamic_cast<Paper_column *> (cols[i]);
 417       if (Item::is_breakable (c) && !c->system_)
 418         ret.push (c);
 419       i++;
 420     }
 421
 422   return ret;
 423 }
 424
 425 /** Return all columns, but filter out any unused columns , since they might
 426     disrupt the spacing problem. */
 427 Link_array<Grob>
 428 System::columns () const
 429 {
 430   extract_grob_set (this, "columns", ro_columns);
 431
 432   int last_breakable = ro_columns.size ();
 433
 434   while (last_breakable--)
 435     {
 436       if (Item::is_breakable (ro_columns [last_breakable]))
 437         break;
 438     }
 439
 440   Link_array<Grob> columns;
 441   for (int i = 0; i <= last_breakable; i++)
 442     {
 443       if (Paper_column::is_used (ro_columns[i]))
 444         columns.push (ro_columns[i]);
 445     }
 446
 447   return columns;
 448 }
 449
 450 int
 451 System::get_rank () const
 452 {
 453   return rank_;
 454 }
 455
 456 ADD_INTERFACE (System, "system-interface",
 457                "This is the toplevel object: each object in a score "
 458                "ultimately has a System object as its X and Y parent. ",
 459                "all-elements spaceable-staves columns")