2 system.cc -- implement System
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "input-smob.hh"
10 #include "axis-group-interface.hh"
14 #include "paper-column.hh"
15 #include "paper-def.hh"
16 #include "paper-outputter.hh"
17 #include "paper-score.hh"
20 #include "dimensions.hh"
21 #include "molecule.hh"
22 #include "all-font-metrics.hh"
23 #include "spacing-interface.hh"
27 fixup_refpoints (SCM s)
29 for (; gh_pair_p (s); s = ly_cdr (s))
31 Grob::fixup_refpoint (ly_car (s));
36 System::System (SCM s)
43 System::element_count () const
45 return scm_ilength (get_grob_property ("all-elements"));
49 System::spanner_count () const
52 for (SCM s = get_grob_property ("all-elements");
53 gh_pair_p (s); s = ly_cdr (s))
55 if (dynamic_cast<Spanner*> (unsmob_grob (gh_car(s))))
64 scm_default_compare (const void * a, const void *b)
69 if (pa < pb) return -1 ;
70 else if (pa > pb) return 1;
75 modify L in place: sort it
81 int len = scm_ilength (l);
82 SCM * arr = new SCM[len];
84 for (SCM s =l ; SCM_NNULLP (s); s = SCM_CDR(s))
85 arr[k++] = SCM_CAR(s);
88 qsort (arr, len, sizeof (SCM), &scm_default_compare);
92 for (int i = 0; i < len ; i++)
94 if (i && arr[i] == arr[i-1])
97 SCM_SETCAR(s, arr[i]);
103 SCM_SETCDR(s, SCM_EOL);
110 System::typeset_grob (Grob * elem)
113 programming_error ("Adding element twice.");
115 elem->pscore_ = pscore_;
116 Pointer_group_interface::add_grob (this, ly_symbol2scm ("all-elements"),elem);
117 scm_gc_unprotect_object (elem->self_scm ());
121 System::output_lines ()
123 for (SCM s = get_grob_property ("all-elements");
124 gh_pair_p (s); s = ly_cdr (s))
126 Grob * g = unsmob_grob (ly_car (s));
127 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
130 Kill no longer needed grobs.
132 Item * it = dynamic_cast<Item*> (g);
133 if (it && Item::breakable_b(it))
135 it->find_prebroken_piece (LEFT)->suicide();
136 it->find_prebroken_piece (RIGHT)->suicide();
141 g->do_break_processing ();
145 fixups must be done in broken line_of_scores, because new elements
146 are put over there. */
148 for (int i=0; i < broken_intos_.size (); i++)
150 Grob *se = broken_intos_[i];
151 SCM all = se->get_grob_property ("all-elements");
152 for (SCM s = all; gh_pair_p (s); s = ly_cdr (s))
154 fixup_refpoint (ly_car (s));
156 count += scm_ilength (all);
160 needed for doing items.
162 fixup_refpoints (get_grob_property ("all-elements"));
165 for (SCM s = get_grob_property ("all-elements");
166 gh_pair_p (s); s = ly_cdr (s))
168 unsmob_grob (ly_car (s))->handle_broken_dependencies ();
170 handle_broken_dependencies ();
173 Because the this->get_grob_property (all-elements) contains items
174 in 3 versions, handle_broken_dependencies () will leave duplicated
175 items in all-elements. Strictly speaking this is harmless, but it
176 leads to duplicated symbols in the output. uniquify_list() makes
177 sure that no duplicates are in the list.
179 for (int i=0; i < broken_intos_.size (); i++)
182 don't do this: strange side effects.
184 // SCM al = broken_intos_[i]->get_grob_property ("all-elements");
185 // al = uniquify_list (al);
188 if (verbose_global_b)
189 progress_indication (_f ("Element count %d.", count + element_count ()));
192 for (int i=0; i < broken_intos_.size (); i++)
194 System *system = dynamic_cast<System*> (broken_intos_[i]);
196 if (verbose_global_b)
197 progress_indication ("[");
198 bool last = i+1 == broken_intos_.size ();
199 system->post_processing (last);
201 if (verbose_global_b)
203 progress_indication (to_string (i));
204 progress_indication ("]");
207 if (i < broken_intos_.size () - 1)
209 SCM lastcol = ly_car (system->get_grob_property ("columns"));
210 Grob* e = unsmob_grob (lastcol);
212 SCM between = ly_symbol2scm ("between-system-string");
213 SCM inter = e->internal_get_grob_property (between);
214 if (gh_string_p (inter))
217 ->output_scheme (scm_list_n (between,
218 inter, SCM_UNDEFINED));
228 Find the loose columns in POSNS, and drape them around the columns
229 specified in BETWEEN-COLS. */
231 set_loose_columns (System* which, Column_x_positions const *posns)
233 for (int i = 0; i < posns->loose_cols_.size (); i++)
236 Item *loose = dynamic_cast<Item*> (posns->loose_cols_[i]);
237 Paper_column* col = dynamic_cast<Paper_column*> (loose);
246 SCM between = loose->get_grob_property ("between-cols");
247 if (!gh_pair_p (between))
251 Item * l=dynamic_cast<Item*> (unsmob_grob (ly_car (between)));
252 Item * r=dynamic_cast<Item*> (unsmob_grob (ly_cdr (between)));
259 left = l->get_column ();
260 if (!left->get_system ())
261 left = left->find_prebroken_piece (RIGHT);
265 loose = right = r->get_column ();
269 if (!right->get_system ())
270 right = right->find_prebroken_piece (LEFT);
273 We divide the remaining space of the column over the left and
274 right side. At the moment, we
277 Grob * common = right->common_refpoint (left, X_AXIS);
279 Real rx = right->extent(common, X_AXIS)[LEFT];
280 Real lx = left->extent(common, X_AXIS)[RIGHT];
281 Real total_dx = rx - lx;
282 Interval cval =col->extent (col, X_AXIS);
286 We put it in the middle. This is not an ideal solution -- the
287 break alignment code inserts a fixed space before the clef
288 (about 1 SS), while the space following the clef is
289 flexible. In tight situations, the clef will almost be on top
290 of the following note.
293 Real dx = rx-lx - cval.length ();
294 if (total_dx < 2* cval.length ())
297 todo: this is discontinuous. I'm too tired to
298 invent a sliding mechanism. Duh.
307 col->system_ = which;
308 col->translate_axis (- col->relative_coordinate (common, X_AXIS), X_AXIS);
309 col->translate_axis (lx + dx - cval[LEFT], X_AXIS);
315 System::break_into_pieces (Array<Column_x_positions> const &breaking)
317 for (int i=0; i < breaking.size (); i++)
319 System *system = dynamic_cast <System*> (clone ());
322 Link_array<Grob> c (breaking[i].cols_);
323 pscore_->typeset_line (system);
325 system->set_bound (LEFT,c[0]);
326 system->set_bound (RIGHT,c.top ());
327 for (int j=0; j < c.size (); j++)
329 c[j]->translate_axis (breaking[i].config_[j],X_AXIS);
330 dynamic_cast<Paper_column*> (c[j])->system_ = system;
332 set_loose_columns (system, &breaking[i]);
333 broken_intos_.push (system);
338 System::output_molecule (SCM expr, Offset o)
342 if (!gh_pair_p (expr))
345 SCM head =ly_car (expr);
346 if (unsmob_input (head))
348 Input * ip = unsmob_input (head);
350 pscore_->outputter_->output_scheme (scm_list_n (ly_symbol2scm ("define-origin"),
351 scm_makfrom0str (ip->file_string ().to_str0 ()),
352 gh_int2scm (ip->line_number ()),
353 gh_int2scm (ip->column_number ()),
355 expr = ly_cadr (expr);
357 else if (head == ly_symbol2scm ("no-origin"))
359 pscore_->outputter_->output_scheme (scm_list_n (head, SCM_UNDEFINED));
360 expr = ly_cadr (expr);
362 else if (head == ly_symbol2scm ("translate-molecule"))
364 o += ly_scm2offset (ly_cadr (expr));
365 expr = ly_caddr (expr);
367 else if (head == ly_symbol2scm ("combine-molecule"))
369 output_molecule (ly_cadr (expr), o);
370 expr = ly_caddr (expr);
374 pscore_->outputter_->
375 output_scheme (scm_list_n (ly_symbol2scm ("placebox"),
376 gh_double2scm (o[X_AXIS]),
377 gh_double2scm (o[Y_AXIS]),
387 System::output_scheme (SCM s)
389 pscore_->outputter_->output_scheme (s);
393 System::add_column (Paper_column*p)
396 SCM cs = me->get_grob_property ("columns");
397 Grob * prev = gh_pair_p (cs) ? unsmob_grob (ly_car (cs)) : 0;
399 p->rank_ = prev ? Paper_column::get_rank (prev) + 1 : 0;
401 me->set_grob_property ("columns", gh_cons (p->self_scm (), cs));
403 Axis_group_interface::add_element (me, p);
407 System::pre_processing ()
409 for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = ly_cdr (s))
410 unsmob_grob (ly_car (s))->discretionary_processing ();
412 if (verbose_global_b)
413 progress_indication (_f ("Grob count %d ", element_count ()));
416 for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = ly_cdr (s))
417 unsmob_grob (ly_car (s))->handle_prebroken_dependencies ();
419 fixup_refpoints (get_grob_property ("all-elements"));
421 for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = ly_cdr (s))
423 Grob* sc = unsmob_grob (ly_car (s));
424 sc->calculate_dependencies (PRECALCED, PRECALCING, ly_symbol2scm ("before-line-breaking-callback"));
427 progress_indication ("\n" + _ ("Calculating line breaks...") + " ");
428 for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s); s = ly_cdr (s))
430 Grob * e = unsmob_grob (ly_car (s));
431 SCM proc = e->get_grob_property ("spacing-procedure");
432 if (gh_procedure_p (proc))
433 gh_call1 (proc, e->self_scm ());
438 const int LAYER_COUNT= 3;
443 System::post_processing (bool last_line)
445 for (SCM s = get_grob_property ("all-elements");
446 gh_pair_p (s); s = ly_cdr (s))
448 Grob* sc = unsmob_grob (ly_car (s));
449 sc->calculate_dependencies (POSTCALCED, POSTCALCING,
450 ly_symbol2scm ("after-line-breaking-callback"));
453 Interval i (extent (this, Y_AXIS));
455 programming_error ("Huh? Empty System?");
457 translate_axis (- i[MAX], Y_AXIS);
459 Real height = i.length ();
462 programming_error ("Improbable system height");
467 generate all molecules to trigger all font loads.
469 (ugh. This is not very memory efficient.) */
471 SCM all = get_grob_property ("all-elements") ;
472 all = uniquify_list (all);
475 triger font loads first.
477 This might seem inefficient, but Molecules are cached per grob
480 this->get_molecule();
481 for (SCM s = all; gh_pair_p (s); s = ly_cdr (s))
483 Grob * g = unsmob_grob (ly_car (s));
490 SCM font_names = ly_quote_scm (get_paper ()->font_descriptions ());
491 output_scheme (scm_list_n (ly_symbol2scm ("define-fonts"),
498 Interval j (extent (this, X_AXIS));
499 Real length = j[RIGHT];
501 output_scheme (scm_list_n (ly_symbol2scm ("start-system"),
502 gh_double2scm (length),
503 gh_double2scm (height),
506 /* Output elements in three layers, 0, 1, 2.
507 The default layer is 1. */
509 Molecule *m = this->get_molecule();
511 output_molecule (m->get_expr (), Offset(0,0));
514 for (int i = 0; i < 3; i++)
515 for (SCM s = get_grob_property ("all-elements"); gh_pair_p (s);
518 Grob *sc = unsmob_grob (ly_car (s));
519 Molecule *m = sc->get_molecule ();
523 SCM s = sc->get_grob_property ("layer");
524 int layer = gh_number_p (s) ? gh_scm2int (s) : 1;
528 Offset o (sc->relative_coordinate (this, X_AXIS),
529 sc->relative_coordinate (this, Y_AXIS));
531 SCM e = sc->get_grob_property ("extra-offset");
534 o[X_AXIS] += gh_scm2double (ly_car (e));
535 o[Y_AXIS] += gh_scm2double (ly_cdr (e));
538 output_molecule (m->get_expr (), o);
545 output_scheme (scm_list_n (ly_symbol2scm ("stop-last-system"), SCM_UNDEFINED));
549 output_scheme (scm_list_n (ly_symbol2scm ("stop-system"), SCM_UNDEFINED));
555 System::broken_col_range (Item const*l, Item const*r) const
557 Link_array<Item> ret;
559 l = l->get_column ();
560 r = r->get_column ();
561 SCM s = get_grob_property ("columns");
563 while (gh_pair_p (s) && ly_car (s) != r->self_scm ())
569 while (gh_pair_p (s) && ly_car (s) != l->self_scm ())
571 Paper_column*c = dynamic_cast<Paper_column*> (unsmob_grob (ly_car (s)));
572 if (Item::breakable_b (c) && !c->system_)
583 Return all columns, but filter out any unused columns , since they might
584 disrupt the spacing problem.
587 System::columns ()const
590 = Pointer_group_interface__extract_grobs (this, (Grob*) 0, "columns");
592 for (int i= acs.size (); i -- ;)
594 bool brb = Item::breakable_b (acs[i]);
595 bfound = bfound || brb;
598 the last column should be breakable. Weed out any columns that
599 seem empty. We need to retain breakable columns, in case
600 someone forced a breakpoint.
602 if (!bfound || !Paper_column::used_b (acs[i]))
611 ADD_INTERFACE (System,"system-interface",
612 "Super grob, parent of all: "
614 "The columns of a score that form one line. The toplevel grob. Any "
615 "grob has a Line_of_score as both X and Y reference point. The "
616 "Paper_score contains one grob of this type. Control enters the "
617 "Grob dependency calculation from this single Line_of_score "
619 "between-system-string all-elements columns");