2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1996--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
22 #include "align-interface.hh"
23 #include "all-font-metrics.hh"
24 #include "axis-group-interface.hh"
25 #include "break-align-interface.hh"
26 #include "grob-array.hh"
27 #include "hara-kiri-group-spanner.hh"
28 #include "international.hh"
31 #include "output-def.hh"
32 #include "page-layout-problem.hh"
33 #include "paper-column.hh"
34 #include "paper-score.hh"
35 #include "paper-system.hh"
36 #include "pointer-group-interface.hh"
37 #include "skyline-pair.hh"
38 #include "staff-symbol-referencer.hh"
39 #include "system-start-delimiter.hh"
40 #include "text-interface.hh"
42 #include "unpure-pure-container.hh"
43 #include "lily-imports.hh"
47 System::System (System const &src)
56 System::System (SCM s)
65 System::init_elements ()
67 SCM scm_arr = Grob_array::make_array ();
68 all_elements_ = unsmob<Grob_array> (scm_arr);
69 all_elements_->set_ordered (false);
70 set_object ("all-elements", scm_arr);
74 System::clone () const
76 return new System (*this);
80 System::element_count () const
82 return all_elements_->size ();
86 System::spanner_count () const
89 for (vsize i = all_elements_->size (); i--;)
90 if (dynamic_cast<Spanner *> (all_elements_->grob (i)))
96 System::typeset_grob (Grob *elem)
99 programming_error ("adding element twice");
102 elem->layout_ = pscore_->layout ();
103 all_elements_->add (elem);
109 System::derived_mark () const
111 if (!all_elements_->empty ())
113 Grob **ptr = &all_elements_->array_reference ()[0];
114 Grob **end = ptr + all_elements_->size ();
117 scm_gc_mark ((*ptr)->self_scm ());
123 scm_gc_mark (pscore_->self_scm ());
125 Spanner::derived_mark ();
129 fixup_refpoints (vector<Grob *> const &grobs)
131 for (vsize i = grobs.size (); i--;)
132 grobs[i]->fixup_refpoint ();
136 System::do_break_substitution_and_fixup_refpoints ()
138 for (vsize i = 0; i < all_elements_->size (); i++)
140 Grob *g = all_elements_->grob (i);
141 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
144 Kill no longer needed grobs.
146 Item *it = dynamic_cast<Item *> (g);
147 if (it && Item::is_non_musical (it))
149 it->find_prebroken_piece (LEFT)->suicide ();
150 it->find_prebroken_piece (RIGHT)->suicide ();
154 else if (g->is_live ())
155 g->do_break_processing ();
159 fixups must be done in broken line_of_scores, because new elements
160 are put over there. */
162 for (vsize i = 0; i < broken_intos_.size (); i++)
164 Grob *se = broken_intos_[i];
166 extract_grob_set (se, "all-elements", all_elts);
167 for (vsize j = 0; j < all_elts.size (); j++)
169 Grob *g = all_elts[j];
170 g->fixup_refpoint ();
173 count += all_elts.size ();
177 needed for doing items.
179 fixup_refpoints (all_elements_->array ());
181 for (vsize i = 0; i < all_elements_->size (); i++)
182 all_elements_->grob (i)->handle_broken_dependencies ();
184 handle_broken_dependencies ();
186 /* Because the get_property (all-elements) contains items in 3
187 versions, handle_broken_dependencies () will leave duplicated
188 items in all-elements. Strictly speaking this is harmless, but
189 it leads to duplicated symbols in the output. uniq makes sure
190 that no duplicates are in the list. */
191 for (vsize i = 0; i < broken_intos_.size (); i++)
193 System *child = dynamic_cast<System *> (broken_intos_[i]);
194 child->all_elements_->remove_duplicates ();
196 for (vsize j = 0; j < child->all_elements_->size (); j++)
198 Grob *g = child->all_elements_->grob (j);
200 (void) g->get_property ("after-line-breaking");
204 debug_output (_f ("Element count %d", count + element_count ()) + "\n");
208 System::get_broken_system_grobs ()
211 for (vsize i = 0; i < broken_intos_.size (); i++)
212 ret = scm_cons (broken_intos_[i]->self_scm (), ret);
213 return scm_reverse_x (ret, SCM_EOL);
217 System::get_paper_systems ()
219 SCM lines = scm_c_make_vector (broken_intos_.size (), SCM_EOL);
220 for (vsize i = 0; i < broken_intos_.size (); i++)
222 debug_output ("[", false);
224 System *system = dynamic_cast<System *> (broken_intos_[i]);
226 scm_vector_set_x (lines, scm_from_int (i),
227 system->get_paper_system ());
229 debug_output (::to_string (i) + "]", false);
235 System::get_footnote_grobs_in_range (vsize start, vsize end)
238 extract_grob_set (this, "footnotes-before-line-breaking", footnote_grobs);
239 for (vsize i = 0; i < footnote_grobs.size (); i++)
241 Grob *at_bat = footnote_grobs[i];
242 int pos = at_bat->spanned_rank_interval ()[LEFT];
243 bool end_of_line_visible = true;
244 if (Spanner *s = dynamic_cast<Spanner *>(at_bat))
246 Direction spanner_placement = robust_scm2dir (s->get_property ("spanner-placement"), LEFT);
247 if (spanner_placement == CENTER)
248 spanner_placement = LEFT;
250 pos = s->spanned_rank_interval ()[spanner_placement];
253 Spanner *orig = dynamic_cast<Spanner *>(s->original ());
254 at_bat = spanner_placement == LEFT ? orig->broken_intos_[0] : orig->broken_intos_.back ();
255 pos = at_bat->spanned_rank_interval ()[RIGHT];
259 if (Item *item = dynamic_cast<Item *>(at_bat))
262 We use this to weed out grobs that fall at the end
263 of the line when we want grobs at the beginning.
265 end_of_line_visible = item->break_status_dir () == LEFT;
267 if (!Item::break_visible (item))
269 // safeguard to bring down the column rank so that end of line footnotes show up on the correct line
270 if (pos == int (start) && item->break_status_dir () != RIGHT)
272 if (pos == int (end) && item->break_status_dir () != LEFT)
274 if (pos != int (end) && pos != int (start) && item->break_status_dir () != CENTER)
278 if (pos < int (start))
282 if (pos == int (start) && end_of_line_visible)
284 if (pos == int (end) && !end_of_line_visible)
286 if (!at_bat->is_live ())
290 Sometimes, there are duplicate entries in the all_elements_
291 list. In a separate patch, this practice should be squashed
292 so that the check below can be eliminated.
294 if (find (out.begin (), out.end (), at_bat) != out.end ())
297 out.push_back (at_bat);
303 System::get_footnote_heights_in_range (vsize start, vsize end)
305 return internal_get_note_heights_in_range (start, end, true);
309 System::get_in_note_heights_in_range (vsize start, vsize end)
311 return internal_get_note_heights_in_range (start, end, false);
315 System::internal_get_note_heights_in_range (vsize start, vsize end, bool foot)
317 vector<Grob *> footnote_grobs = get_footnote_grobs_in_range (start, end);
320 for (vsize i = footnote_grobs.size (); i--;)
322 ? !to_boolean (footnote_grobs[i]->get_property ("footnote"))
323 : to_boolean (footnote_grobs[i]->get_property ("footnote")))
324 footnote_grobs.erase (footnote_grobs.begin () + i);
326 for (vsize i = 0; i < footnote_grobs.size (); i++)
328 SCM footnote_markup = footnote_grobs[i]->get_property ("footnote-text");
330 if (!Text_interface::is_markup (footnote_markup))
334 Lily::layout_extract_page_properties (pscore_->layout ()->self_scm ());
336 SCM footnote_stl = Text_interface::interpret_markup (pscore_->layout ()->self_scm (),
337 props, footnote_markup);
339 Stencil *footnote_stencil = unsmob<Stencil> (footnote_stl);
340 out.push_back (footnote_stencil->extent (Y_AXIS).length ());
347 System::num_footnotes ()
349 extract_grob_set (this, "footnotes-after-line-breaking", footnote_grobs);
350 return footnote_grobs.size ();
354 grob_2D_less (Grob *g1, Grob *g2)
357 Grob *gs[] = {g1, g2};
359 for (int i = 0; i < 2; i++)
361 sri[i] = gs[i]->spanned_rank_interval ()[LEFT];
362 if (Spanner *s = dynamic_cast<Spanner *> (gs[i]))
364 if (s->broken_intos_.size ())
365 s = (scm_to_int (s->broken_intos_[0]->get_property ("spanner-placement")) == LEFT
366 ? s->broken_intos_[0]
367 : s->broken_intos_.back ());
369 if (robust_scm2double (s->get_property ("X-offset"), 0.0) > 0)
370 sri[i] = s->spanned_rank_interval ()[RIGHT];
374 if (sri[0] == sri[1])
375 return Grob::vertical_less (gs[0], gs[1]);
377 return sri[0] < sri[1];
380 MAKE_SCHEME_CALLBACK (System, footnotes_before_line_breaking, 1);
382 System::footnotes_before_line_breaking (SCM smob)
384 Grob *me = unsmob<Grob> (smob);
385 vector<Grob *> footnotes;
386 SCM grobs_scm = Grob_array::make_array ();
387 extract_grob_set (me, "all-elements", elts);
388 for (vsize i = 0; i < elts.size (); i++)
389 if (elts[i]->internal_has_interface (ly_symbol2scm ("footnote-interface")))
390 footnotes.push_back (elts[i]);
392 unsmob<Grob_array> (grobs_scm)->set_array (footnotes);
396 MAKE_SCHEME_CALLBACK (System, footnotes_after_line_breaking, 1);
398 System::footnotes_after_line_breaking (SCM smob)
400 Spanner *sys_span = unsmob<Spanner> (smob);
401 System *sys = dynamic_cast<System *> (sys_span);
402 Interval_t<int> sri = sys->spanned_rank_interval ();
403 vector<Grob *> footnote_grobs = sys->get_footnote_grobs_in_range (sri[LEFT], sri[RIGHT]);
404 vector_sort (footnote_grobs, grob_2D_less);
406 SCM grobs_scm = Grob_array::make_array ();
407 unsmob<Grob_array> (grobs_scm)->set_array (footnote_grobs);
411 MAKE_SCHEME_CALLBACK (System, vertical_skyline_elements, 1);
413 System::vertical_skyline_elements (SCM smob)
415 Grob *me_grob = unsmob<Grob> (smob);
416 vector<Grob *> vertical_skyline_grobs;
417 extract_grob_set (me_grob, "elements", my_elts);
418 for (vsize i = 0; i < my_elts.size (); i++)
419 if (has_interface<System_start_delimiter> (my_elts[i]))
420 vertical_skyline_grobs.push_back (my_elts[i]);
422 System *me = dynamic_cast<System *> (me_grob);
423 Grob *align = unsmob<Grob> (me->get_object ("vertical-alignment"));
426 SCM grobs_scm = Grob_array::make_array ();
427 unsmob<Grob_array> (grobs_scm)->set_array (vertical_skyline_grobs);
431 extract_grob_set (align, "elements", elts);
433 for (vsize i = 0; i < elts.size (); i++)
434 if (has_interface<Hara_kiri_group_spanner> (elts[i]))
435 vertical_skyline_grobs.push_back (elts[i]);
437 SCM grobs_scm = Grob_array::make_array ();
438 unsmob<Grob_array> (grobs_scm)->set_array (vertical_skyline_grobs);
443 System::break_into_pieces (vector<Column_x_positions> const &breaking)
445 for (vsize i = 0; i < breaking.size (); i++)
447 System *system = dynamic_cast<System *> (clone ());
448 system->rank_ = broken_intos_.size ();
450 vector<Grob *> c (breaking[i].cols_);
451 pscore_->typeset_system (system);
453 int st = Paper_column::get_rank (c[0]);
454 int end = Paper_column::get_rank (c.back ());
455 Interval iv (pure_y_extent (this, st, end));
456 system->set_property ("pure-Y-extent", ly_interval2scm (iv));
458 system->set_bound (LEFT, c[0]);
459 system->set_bound (RIGHT, c.back ());
460 SCM system_labels = SCM_EOL;
461 for (vsize j = 0; j < c.size (); j++)
463 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
464 dynamic_cast<Paper_column *> (c[j])->set_system (system);
465 /* collect the column labels */
466 collect_labels (c[j], &system_labels);
469 Collect labels from any loose columns too: theses will be set on
470 an empty bar line or a column which is otherwise unused mid-line
472 vector<Grob *> loose (breaking[i].loose_cols_);
473 for (vsize j = 0; j < loose.size (); j++)
474 collect_labels (loose[j], &system_labels);
476 system->set_property ("labels", system_labels);
478 set_loose_columns (system, &breaking[i]);
479 broken_intos_.push_back (system);
484 System::collect_labels (Grob const *col, SCM *labels)
486 SCM col_labels = col->get_property ("labels");
487 if (scm_is_pair (col_labels))
488 *labels = scm_append (scm_list_2 (col_labels, *labels));
492 System::add_column (Paper_column *p)
495 Grob_array *ga = unsmob<Grob_array> (me->get_object ("columns"));
498 SCM scm_ga = Grob_array::make_array ();
499 me->set_object ("columns", scm_ga);
500 ga = unsmob<Grob_array> (scm_ga);
503 p->set_rank (ga->size ());
506 Axis_group_interface::add_element (this, p);
510 System::pre_processing ()
512 for (vsize i = 0; i < all_elements_->size (); i++)
513 all_elements_->grob (i)->discretionary_processing ();
515 debug_output (_f ("Grob count %d", element_count ()));
518 order is significant: broken grobs are added to the end of the
519 array, and should be processed before the original is potentially
522 for (vsize i = all_elements_->size (); i--;)
523 all_elements_->grob (i)->handle_prebroken_dependencies ();
525 fixup_refpoints (all_elements_->array ());
527 for (vsize i = 0; i < all_elements_->size (); i++)
529 Grob *g = all_elements_->grob (i);
530 (void) g->get_property ("before-line-breaking");
533 for (vsize i = 0; i < all_elements_->size (); i++)
535 Grob *e = all_elements_->grob (i);
536 (void) e->get_property ("springs-and-rods");
541 System::post_processing ()
543 Interval iv (extent (this, Y_AXIS));
545 programming_error ("system with empty extent");
547 translate_axis (-iv[MAX], Y_AXIS);
549 /* Generate all stencils to trigger font loads.
550 This might seem inefficient, but Stencils are cached per grob
553 vector<Grob *> all_elts_sorted (all_elements_->array ());
554 uniquify (all_elts_sorted);
556 for (vsize i = all_elts_sorted.size (); i--;)
558 Grob *g = all_elts_sorted[i];
570 operator < (Layer_entry const &a,
571 Layer_entry const &b)
573 return a.layer_ < b.layer_;
577 System::get_paper_system ()
584 vector<Layer_entry> entries;
585 for (vsize j = 0; j < all_elements_->size (); j++)
588 e.grob_ = all_elements_->grob (j);
589 e.layer_ = robust_scm2int (e.grob_->get_property ("layer"), 1);
591 entries.push_back (e);
594 vector_sort (entries, std::less<Layer_entry> ());
595 for (vsize j = 0; j < entries.size (); j++)
597 Grob *g = entries[j].grob_;
598 Stencil st = g->get_print_stencil ();
600 if (scm_is_null (st.expr ()))
604 for (int a = X_AXIS; a < NO_AXES; a++)
605 o[Axis (a)] = g->relative_coordinate (this, Axis (a));
607 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
609 * Staff_symbol_referencer::staff_space (g);
611 /* Must copy the stencil, for we cannot change the stencil
614 st.translate (o + extra);
616 *tail = scm_cons (st.expr (), SCM_EOL);
617 tail = SCM_CDRLOC (*tail);
620 if (Stencil *me = get_stencil ())
621 exprs = scm_cons (me->expr (), exprs);
623 Interval x (extent (this, X_AXIS));
624 Interval y (extent (this, Y_AXIS));
625 Stencil sys_stencil (Box (x, y),
626 scm_cons (ly_symbol2scm ("combine-stencil"),
630 Skyline_pair *skylines = unsmob<Skyline_pair> (get_property ("vertical-skylines"));
634 = Lookup::points_to_line_stencil (0.1, (*skylines)[UP].to_points (X_AXIS));
636 = Lookup::points_to_line_stencil (0.1, (*skylines)[DOWN].to_points (X_AXIS));
637 sys_stencil.add_stencil (up.in_color (255, 0, 0));
638 sys_stencil.add_stencil (down.in_color (0, 255, 0));
642 Grob *left_bound = get_bound (LEFT);
643 SCM prop_init = left_bound->get_property ("line-break-system-details");
644 Prob *pl = make_paper_system (prop_init);
645 paper_system_set_stencil (pl, sys_stencil);
647 /* information that the page breaker might need */
648 Grob *right_bound = get_bound (RIGHT);
649 pl->set_property ("vertical-skylines", get_property ("vertical-skylines"));
650 pl->set_property ("page-break-permission", right_bound->get_property ("page-break-permission"));
651 pl->set_property ("page-turn-permission", right_bound->get_property ("page-turn-permission"));
652 pl->set_property ("page-break-penalty", right_bound->get_property ("page-break-penalty"));
653 pl->set_property ("page-turn-penalty", right_bound->get_property ("page-turn-penalty"));
655 if (right_bound->original () == dynamic_cast<System *> (original ())->get_bound (RIGHT))
656 pl->set_property ("last-in-score", SCM_BOOL_T);
658 Interval staff_refpoints;
659 if (Grob *align = unsmob<Grob> (get_object ("vertical-alignment")))
661 extract_grob_set (align, "elements", staves);
662 for (vsize i = 0; i < staves.size (); i++)
663 if (staves[i]->is_live ()
664 && Page_layout_problem::is_spaceable (staves[i]))
665 staff_refpoints.add_point (staves[i]->relative_coordinate (this,
669 pl->set_property ("staff-refpoint-extent", ly_interval2scm (staff_refpoints));
670 pl->set_property ("system-grob", self_scm ());
672 return pl->unprotect ();
676 System::broken_col_range (Item const *left, Item const *right) const
680 left = left->get_column ();
681 right = right->get_column ();
683 extract_grob_set (this, "columns", cols);
685 vsize i = Paper_column::get_rank (left);
686 int end_rank = Paper_column::get_rank (right);
687 if (i < cols.size ())
690 while (i < cols.size ()
691 && Paper_column::get_rank (cols[i]) < end_rank)
693 Paper_column *c = dynamic_cast<Paper_column *> (cols[i]);
694 if (Paper_column::is_breakable (c) && !c->get_system ())
702 /** Return all columns, but filter out any unused columns , since they might
703 disrupt the spacing problem. */
705 System::used_columns () const
707 extract_grob_set (this, "columns", ro_columns);
709 int last_breakable = ro_columns.size ();
711 while (last_breakable--)
713 if (Paper_column::is_breakable (ro_columns [last_breakable]))
717 vector<Grob *> columns;
718 for (int i = 0; i <= last_breakable; i++)
720 if (Paper_column::is_used (ro_columns[i]))
721 columns.push_back (ro_columns[i]);
728 System::column (vsize which) const
730 extract_grob_set (this, "columns", columns);
731 if (which >= columns.size ())
734 return dynamic_cast<Paper_column *> (columns[which]);
738 System::paper_score () const
744 System::get_rank () const
750 get_root_system (Grob *me)
752 Grob *system_grob = me;
754 while (system_grob->get_parent (Y_AXIS))
755 system_grob = system_grob->get_parent (Y_AXIS);
757 return dynamic_cast<System *> (system_grob);
760 MAKE_SCHEME_CALLBACK (System, get_vertical_alignment, 1);
762 System::get_vertical_alignment (SCM smob)
764 Grob *me = unsmob<Grob> (smob);
765 extract_grob_set (me, "elements", elts);
767 for (vsize i = 0; i < elts.size (); i++)
768 if (has_interface<Align_interface> (elts[i]))
771 me->programming_error ("found multiple vertical alignments in this system");
777 me->programming_error ("didn't find a vertical alignment in this system");
780 return ret->self_scm ();
783 // Finds the furthest staff in the given direction whose x-extent
784 // overlaps with the given interval.
786 System::get_extremal_staff (Direction dir, Interval const &iv)
788 Grob *align = unsmob<Grob> (get_object ("vertical-alignment"));
792 extract_grob_set (align, "elements", elts);
793 vsize start = (dir == UP) ? 0 : elts.size () - 1;
794 vsize end = (dir == UP) ? elts.size () : VPOS;
795 for (vsize i = start; i != end; i += dir)
797 if (has_interface<Hara_kiri_group_spanner> (elts[i]))
798 Hara_kiri_group_spanner::consider_suicide (elts[i]);
800 Interval intersection = elts[i]->extent (this, X_AXIS);
801 intersection.intersect (iv);
802 if (elts[i]->is_live () && !intersection.is_empty ())
808 // Finds the neighboring staff in the given direction over bounds
810 System::get_neighboring_staff (Direction dir, Grob *vertical_axis_group, Interval_t<int> bounds)
812 Grob *align = unsmob<Grob> (get_object ("vertical-alignment"));
816 extract_grob_set (align, "elements", elts);
817 vsize start = (dir == UP) ? 0 : elts.size () - 1;
818 vsize end = (dir == UP) ? elts.size () : VPOS;
822 for (vsize i = start; i != end; i += dir)
824 if (elts[i] == vertical_axis_group)
827 if (has_interface<Hara_kiri_group_spanner> (elts[i]))
828 Hara_kiri_group_spanner::consider_suicide (elts[i]);
830 bounds.intersect (elts[i]->spanned_rank_interval ());
831 if (elts[i]->is_live () && !bounds.is_empty ())
839 System::pure_refpoint_extent (vsize start, vsize end)
842 Grob *alignment = unsmob<Grob> (get_object ("vertical-alignment"));
846 extract_grob_set (alignment, "elements", staves);
847 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
849 for (vsize i = 0; i < offsets.size (); ++i)
850 if (Page_layout_problem::is_spaceable (staves[i]))
852 ret[UP] = offsets[i];
856 for (vsize i = offsets.size (); i--;)
857 if (Page_layout_problem::is_spaceable (staves[i]))
859 ret[DOWN] = offsets[i];
867 System::part_of_line_pure_height (vsize start, vsize end, bool begin)
869 Grob *alignment = unsmob<Grob> (get_object ("vertical-alignment"));
873 extract_grob_set (alignment, "elements", staves);
874 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
877 for (vsize i = 0; i < staves.size (); ++i)
880 ? Axis_group_interface::begin_of_line_pure_height (staves[i], start)
881 : Axis_group_interface::rest_of_line_pure_height (staves[i], start, end);
882 if (i < offsets.size ())
883 iv.translate (offsets[i]);
887 Interval other_elements = begin
888 ? Axis_group_interface::begin_of_line_pure_height (this, start)
889 : Axis_group_interface::rest_of_line_pure_height (this, start, end);
891 ret.unite (other_elements);
897 System::begin_of_line_pure_height (vsize start, vsize end)
899 return part_of_line_pure_height (start, end, true);
903 System::rest_of_line_pure_height (vsize start, vsize end)
905 return part_of_line_pure_height (start, end, false);
908 // This differs from Axis_group_interface::calc_pure_relevant_grobs
909 // because here, we are only interested in those few elements that aren't
910 // descended from VerticalAlignment (ie. things like RehearsalMark, BarLine).
911 MAKE_SCHEME_CALLBACK (System, calc_pure_relevant_grobs, 1);
913 System::calc_pure_relevant_grobs (SCM smob)
915 Grob *me = unsmob<Grob> (smob);
917 extract_grob_set (me, "elements", elts);
918 vector<Grob *> relevant_grobs;
920 for (vsize i = 0; i < elts.size (); ++i)
922 if (!has_interface<Axis_group_interface> (elts[i]))
924 relevant_grobs.push_back (elts[i]);
926 if (Item *it = dynamic_cast<Item *> (elts[i]))
928 for (LEFT_and_RIGHT (d))
930 Item *piece = it->find_prebroken_piece (d);
931 if (piece && piece->is_live ())
932 relevant_grobs.push_back (piece);
938 SCM grobs_scm = Grob_array::make_array ();
940 unsmob<Grob_array> (grobs_scm)->set_array (relevant_grobs);
944 MAKE_SCHEME_CALLBACK (System, height, 1);
946 System::height (SCM smob)
948 return Axis_group_interface::height (smob);
951 MAKE_SCHEME_CALLBACK (System, calc_pure_height, 3);
953 System::calc_pure_height (SCM smob, SCM start_scm, SCM end_scm)
955 System *me = unsmob<System> (smob);
956 int start = scm_to_int (start_scm);
957 int end = scm_to_int (end_scm);
959 Interval begin = me->begin_of_line_pure_height (start, end);
960 Interval rest = me->rest_of_line_pure_height (start, end);
963 return ly_interval2scm (begin);
967 System::get_pure_bound (Direction d, int start, int end)
969 vector<vsize> ranks = pscore_->get_break_ranks ();
970 vector<vsize> indices = pscore_->get_break_indices ();
971 vector<Grob *> cols = pscore_->get_columns ();
973 vsize target_rank = (d == LEFT ? start : end);
974 vector<vsize>::const_iterator i
975 = lower_bound (ranks.begin (), ranks.end (), target_rank, std::less<vsize> ());
977 if (i != ranks.end () && (*i) == target_rank)
978 return cols[indices[i - ranks.begin ()]];
984 System::get_maybe_pure_bound (Direction d, bool pure, int start, int end)
986 return pure ? get_pure_bound (d, start, end) : get_bound (d);
997 get_maybe_spaceable_staves (SCM smob, int filter)
999 System *me = unsmob<System> (smob);
1000 Grob *align = unsmob<Grob> (me->get_object ("vertical_alignment"));
1006 extract_grob_set (align, "elements", staves);
1008 for (vsize i = 0; i < staves.size (); ++i)
1010 bool spaceable = Page_layout_problem::is_spaceable (staves[i]);
1011 if (staves[i]->is_live ()
1012 && ((filter == ALL_STAVES)
1013 || (filter == SPACEABLE_STAVES && spaceable)
1014 || (filter == NONSPACEABLE_STAVES && !spaceable)))
1016 *tail = scm_cons (staves[i]->self_scm (), SCM_EOL);
1017 tail = SCM_CDRLOC (*tail);
1025 MAKE_SCHEME_CALLBACK (System, get_staves, 1)
1027 System::get_staves (SCM smob)
1029 return get_maybe_spaceable_staves (smob, ALL_STAVES);
1032 MAKE_SCHEME_CALLBACK (System, get_spaceable_staves, 1)
1034 System::get_spaceable_staves (SCM smob)
1036 return get_maybe_spaceable_staves (smob, SPACEABLE_STAVES);
1039 MAKE_SCHEME_CALLBACK (System, get_nonspaceable_staves, 1)
1041 System::get_nonspaceable_staves (SCM smob)
1043 return get_maybe_spaceable_staves (smob, NONSPACEABLE_STAVES);
1046 ADD_INTERFACE (System,
1047 "This is the top-level object: Each object in a score"
1048 " ultimately has a @code{System} object as its X and"
1055 "footnotes-before-line-breaking "
1056 "footnotes-after-line-breaking "
1057 "in-note-direction "
1062 "vertical-alignment "