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"
45 System::System (System const &src)
54 System::System (SCM s)
63 System::init_elements ()
65 SCM scm_arr = Grob_array::make_array ();
66 all_elements_ = unsmob<Grob_array> (scm_arr);
67 all_elements_->set_ordered (false);
68 set_object ("all-elements", scm_arr);
72 System::clone () const
74 return new System (*this);
78 System::element_count () const
80 return all_elements_->size ();
84 System::spanner_count () const
87 for (vsize i = all_elements_->size (); i--;)
88 if (dynamic_cast<Spanner *> (all_elements_->grob (i)))
94 System::typeset_grob (Grob *elem)
97 programming_error ("adding element twice");
100 elem->layout_ = pscore_->layout ();
101 all_elements_->add (elem);
107 System::derived_mark () const
109 if (!all_elements_->empty ())
111 Grob **ptr = &all_elements_->array_reference ()[0];
112 Grob **end = ptr + all_elements_->size ();
115 scm_gc_mark ((*ptr)->self_scm ());
121 scm_gc_mark (pscore_->self_scm ());
123 Spanner::derived_mark ();
127 fixup_refpoints (vector<Grob *> const &grobs)
129 for (vsize i = grobs.size (); i--;)
130 grobs[i]->fixup_refpoint ();
134 System::do_break_substitution_and_fixup_refpoints ()
136 for (vsize i = 0; i < all_elements_->size (); i++)
138 Grob *g = all_elements_->grob (i);
139 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
142 Kill no longer needed grobs.
144 Item *it = dynamic_cast<Item *> (g);
145 if (it && Item::is_non_musical (it))
147 it->find_prebroken_piece (LEFT)->suicide ();
148 it->find_prebroken_piece (RIGHT)->suicide ();
152 else if (g->is_live ())
153 g->do_break_processing ();
157 fixups must be done in broken line_of_scores, because new elements
158 are put over there. */
160 for (vsize i = 0; i < broken_intos_.size (); i++)
162 Grob *se = broken_intos_[i];
164 extract_grob_set (se, "all-elements", all_elts);
165 for (vsize j = 0; j < all_elts.size (); j++)
167 Grob *g = all_elts[j];
168 g->fixup_refpoint ();
171 count += all_elts.size ();
175 needed for doing items.
177 fixup_refpoints (all_elements_->array ());
179 for (vsize i = 0; i < all_elements_->size (); i++)
180 all_elements_->grob (i)->handle_broken_dependencies ();
182 handle_broken_dependencies ();
184 /* Because the get_property (all-elements) contains items in 3
185 versions, handle_broken_dependencies () will leave duplicated
186 items in all-elements. Strictly speaking this is harmless, but
187 it leads to duplicated symbols in the output. uniq makes sure
188 that no duplicates are in the list. */
189 for (vsize i = 0; i < broken_intos_.size (); i++)
191 System *child = dynamic_cast<System *> (broken_intos_[i]);
192 child->all_elements_->remove_duplicates ();
194 for (vsize j = 0; j < child->all_elements_->size (); j++)
196 Grob *g = child->all_elements_->grob (j);
198 (void) g->get_property ("after-line-breaking");
202 debug_output (_f ("Element count %d", count + element_count ()) + "\n");
206 System::get_broken_system_grobs ()
209 for (vsize i = 0; i < broken_intos_.size (); i++)
210 ret = scm_cons (broken_intos_[i]->self_scm (), ret);
211 return scm_reverse_x (ret, SCM_EOL);
215 System::get_paper_systems ()
217 SCM lines = scm_c_make_vector (broken_intos_.size (), SCM_EOL);
218 for (vsize i = 0; i < broken_intos_.size (); i++)
220 debug_output ("[", false);
222 System *system = dynamic_cast<System *> (broken_intos_[i]);
224 scm_vector_set_x (lines, scm_from_int (i),
225 system->get_paper_system ());
227 debug_output (::to_string (i) + "]", false);
233 System::get_footnote_grobs_in_range (vsize start, vsize end)
236 extract_grob_set (this, "footnotes-before-line-breaking", footnote_grobs);
237 for (vsize i = 0; i < footnote_grobs.size (); i++)
239 Grob *at_bat = footnote_grobs[i];
240 int pos = at_bat->spanned_rank_interval ()[LEFT];
241 bool end_of_line_visible = true;
242 if (Spanner *s = dynamic_cast<Spanner *>(at_bat))
244 Direction spanner_placement = robust_scm2dir (s->get_property ("spanner-placement"), LEFT);
245 if (spanner_placement == CENTER)
246 spanner_placement = LEFT;
248 pos = s->spanned_rank_interval ()[spanner_placement];
251 Spanner *orig = dynamic_cast<Spanner *>(s->original ());
252 at_bat = spanner_placement == LEFT ? orig->broken_intos_[0] : orig->broken_intos_.back ();
253 pos = at_bat->spanned_rank_interval ()[RIGHT];
257 if (Item *item = dynamic_cast<Item *>(at_bat))
260 We use this to weed out grobs that fall at the end
261 of the line when we want grobs at the beginning.
263 end_of_line_visible = item->break_status_dir () == LEFT;
265 if (!Item::break_visible (item))
267 // safeguard to bring down the column rank so that end of line footnotes show up on the correct line
268 if (pos == int (start) && item->break_status_dir () != RIGHT)
270 if (pos == int (end) && item->break_status_dir () != LEFT)
272 if (pos != int (end) && pos != int (start) && item->break_status_dir () != CENTER)
276 if (pos < int (start))
280 if (pos == int (start) && end_of_line_visible)
282 if (pos == int (end) && !end_of_line_visible)
284 if (!at_bat->is_live ())
288 Sometimes, there are duplicate entries in the all_elements_
289 list. In a separate patch, this practice should be squashed
290 so that the check below can be eliminated.
292 if (find (out.begin (), out.end (), at_bat) != out.end ())
295 out.push_back (at_bat);
301 System::get_footnote_heights_in_range (vsize start, vsize end)
303 return internal_get_note_heights_in_range (start, end, true);
307 System::get_in_note_heights_in_range (vsize start, vsize end)
309 return internal_get_note_heights_in_range (start, end, false);
313 System::internal_get_note_heights_in_range (vsize start, vsize end, bool foot)
315 vector<Grob *> footnote_grobs = get_footnote_grobs_in_range (start, end);
318 for (vsize i = footnote_grobs.size (); i--;)
320 ? !to_boolean (footnote_grobs[i]->get_property ("footnote"))
321 : to_boolean (footnote_grobs[i]->get_property ("footnote")))
322 footnote_grobs.erase (footnote_grobs.begin () + i);
324 for (vsize i = 0; i < footnote_grobs.size (); i++)
326 SCM footnote_markup = footnote_grobs[i]->get_property ("footnote-text");
328 if (!Text_interface::is_markup (footnote_markup))
332 Lily::layout_extract_page_properties (pscore_->layout ()->self_scm ());
334 SCM footnote_stl = Text_interface::interpret_markup (pscore_->layout ()->self_scm (),
335 props, footnote_markup);
337 Stencil *footnote_stencil = unsmob<Stencil> (footnote_stl);
338 out.push_back (footnote_stencil->extent (Y_AXIS).length ());
345 System::num_footnotes ()
347 extract_grob_set (this, "footnotes-after-line-breaking", footnote_grobs);
348 return footnote_grobs.size ();
352 grob_2D_less (Grob *g1, Grob *g2)
355 Grob *gs[] = {g1, g2};
357 for (int i = 0; i < 2; i++)
359 sri[i] = gs[i]->spanned_rank_interval ()[LEFT];
360 if (Spanner *s = dynamic_cast<Spanner *> (gs[i]))
362 if (s->broken_intos_.size ())
363 s = (scm_to_int (s->broken_intos_[0]->get_property ("spanner-placement")) == LEFT
364 ? s->broken_intos_[0]
365 : s->broken_intos_.back ());
367 if (robust_scm2double (s->get_property ("X-offset"), 0.0) > 0)
368 sri[i] = s->spanned_rank_interval ()[RIGHT];
372 if (sri[0] == sri[1])
373 return Grob::vertical_less (gs[0], gs[1]);
375 return sri[0] < sri[1];
378 MAKE_SCHEME_CALLBACK (System, footnotes_before_line_breaking, 1);
380 System::footnotes_before_line_breaking (SCM smob)
382 Grob *me = unsmob<Grob> (smob);
383 vector<Grob *> footnotes;
384 SCM grobs_scm = Grob_array::make_array ();
385 extract_grob_set (me, "all-elements", elts);
386 for (vsize i = 0; i < elts.size (); i++)
387 if (elts[i]->internal_has_interface (ly_symbol2scm ("footnote-interface")))
388 footnotes.push_back (elts[i]);
390 unsmob<Grob_array> (grobs_scm)->set_array (footnotes);
394 MAKE_SCHEME_CALLBACK (System, footnotes_after_line_breaking, 1);
396 System::footnotes_after_line_breaking (SCM smob)
398 Spanner *sys_span = unsmob<Spanner> (smob);
399 System *sys = dynamic_cast<System *> (sys_span);
400 Interval_t<int> sri = sys->spanned_rank_interval ();
401 vector<Grob *> footnote_grobs = sys->get_footnote_grobs_in_range (sri[LEFT], sri[RIGHT]);
402 vector_sort (footnote_grobs, grob_2D_less);
404 SCM grobs_scm = Grob_array::make_array ();
405 unsmob<Grob_array> (grobs_scm)->set_array (footnote_grobs);
409 MAKE_SCHEME_CALLBACK (System, vertical_skyline_elements, 1);
411 System::vertical_skyline_elements (SCM smob)
413 Grob *me_grob = unsmob<Grob> (smob);
414 vector<Grob *> vertical_skyline_grobs;
415 extract_grob_set (me_grob, "elements", my_elts);
416 for (vsize i = 0; i < my_elts.size (); i++)
417 if (System_start_delimiter::has_interface (my_elts[i]))
418 vertical_skyline_grobs.push_back (my_elts[i]);
420 System *me = dynamic_cast<System *> (me_grob);
421 Grob *align = unsmob<Grob> (me->get_object ("vertical-alignment"));
424 SCM grobs_scm = Grob_array::make_array ();
425 unsmob<Grob_array> (grobs_scm)->set_array (vertical_skyline_grobs);
429 extract_grob_set (align, "elements", elts);
431 for (vsize i = 0; i < elts.size (); i++)
432 if (Hara_kiri_group_spanner::has_interface (elts[i]))
433 vertical_skyline_grobs.push_back (elts[i]);
435 SCM grobs_scm = Grob_array::make_array ();
436 unsmob<Grob_array> (grobs_scm)->set_array (vertical_skyline_grobs);
441 System::break_into_pieces (vector<Column_x_positions> const &breaking)
443 for (vsize i = 0; i < breaking.size (); i++)
445 System *system = dynamic_cast<System *> (clone ());
446 system->rank_ = broken_intos_.size ();
448 vector<Grob *> c (breaking[i].cols_);
449 pscore_->typeset_system (system);
451 int st = Paper_column::get_rank (c[0]);
452 int end = Paper_column::get_rank (c.back ());
453 Interval iv (pure_y_extent (this, st, end));
454 system->set_property ("pure-Y-extent", ly_interval2scm (iv));
456 system->set_bound (LEFT, c[0]);
457 system->set_bound (RIGHT, c.back ());
458 SCM system_labels = SCM_EOL;
459 for (vsize j = 0; j < c.size (); j++)
461 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
462 dynamic_cast<Paper_column *> (c[j])->set_system (system);
463 /* collect the column labels */
464 collect_labels (c[j], &system_labels);
467 Collect labels from any loose columns too: theses will be set on
468 an empty bar line or a column which is otherwise unused mid-line
470 vector<Grob *> loose (breaking[i].loose_cols_);
471 for (vsize j = 0; j < loose.size (); j++)
472 collect_labels (loose[j], &system_labels);
474 system->set_property ("labels", system_labels);
476 set_loose_columns (system, &breaking[i]);
477 broken_intos_.push_back (system);
482 System::collect_labels (Grob const *col, SCM *labels)
484 SCM col_labels = col->get_property ("labels");
485 if (scm_is_pair (col_labels))
486 *labels = scm_append (scm_list_2 (col_labels, *labels));
490 System::add_column (Paper_column *p)
493 Grob_array *ga = unsmob<Grob_array> (me->get_object ("columns"));
496 SCM scm_ga = Grob_array::make_array ();
497 me->set_object ("columns", scm_ga);
498 ga = unsmob<Grob_array> (scm_ga);
501 p->set_rank (ga->size ());
504 Axis_group_interface::add_element (this, p);
508 System::pre_processing ()
510 for (vsize i = 0; i < all_elements_->size (); i++)
511 all_elements_->grob (i)->discretionary_processing ();
513 debug_output (_f ("Grob count %d", element_count ()));
516 order is significant: broken grobs are added to the end of the
517 array, and should be processed before the original is potentially
520 for (vsize i = all_elements_->size (); i--;)
521 all_elements_->grob (i)->handle_prebroken_dependencies ();
523 fixup_refpoints (all_elements_->array ());
525 for (vsize i = 0; i < all_elements_->size (); i++)
527 Grob *g = all_elements_->grob (i);
528 (void) g->get_property ("before-line-breaking");
531 for (vsize i = 0; i < all_elements_->size (); i++)
533 Grob *e = all_elements_->grob (i);
534 (void) e->get_property ("springs-and-rods");
539 System::post_processing ()
541 Interval iv (extent (this, Y_AXIS));
543 programming_error ("system with empty extent");
545 translate_axis (-iv[MAX], Y_AXIS);
547 /* Generate all stencils to trigger font loads.
548 This might seem inefficient, but Stencils are cached per grob
551 vector<Grob *> all_elts_sorted (all_elements_->array ());
552 uniquify (all_elts_sorted);
554 for (vsize i = all_elts_sorted.size (); i--;)
556 Grob *g = all_elts_sorted[i];
568 operator < (Layer_entry const &a,
569 Layer_entry const &b)
571 return a.layer_ < b.layer_;
575 System::get_paper_system ()
582 vector<Layer_entry> entries;
583 for (vsize j = 0; j < all_elements_->size (); j++)
586 e.grob_ = all_elements_->grob (j);
587 e.layer_ = robust_scm2int (e.grob_->get_property ("layer"), 1);
589 entries.push_back (e);
592 vector_sort (entries, std::less<Layer_entry> ());
593 for (vsize j = 0; j < entries.size (); j++)
595 Grob *g = entries[j].grob_;
596 Stencil st = g->get_print_stencil ();
598 if (scm_is_null (st.expr ()))
602 for (int a = X_AXIS; a < NO_AXES; a++)
603 o[Axis (a)] = g->relative_coordinate (this, Axis (a));
605 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
607 * Staff_symbol_referencer::staff_space (g);
609 /* Must copy the stencil, for we cannot change the stencil
612 st.translate (o + extra);
614 *tail = scm_cons (st.expr (), SCM_EOL);
615 tail = SCM_CDRLOC (*tail);
618 if (Stencil *me = get_stencil ())
619 exprs = scm_cons (me->expr (), exprs);
621 Interval x (extent (this, X_AXIS));
622 Interval y (extent (this, Y_AXIS));
623 Stencil sys_stencil (Box (x, y),
624 scm_cons (ly_symbol2scm ("combine-stencil"),
628 Skyline_pair *skylines = unsmob<Skyline_pair> (get_property ("vertical-skylines"));
632 = Lookup::points_to_line_stencil (0.1, (*skylines)[UP].to_points (X_AXIS));
634 = Lookup::points_to_line_stencil (0.1, (*skylines)[DOWN].to_points (X_AXIS));
635 sys_stencil.add_stencil (up.in_color (255, 0, 0));
636 sys_stencil.add_stencil (down.in_color (0, 255, 0));
640 Grob *left_bound = get_bound (LEFT);
641 SCM prop_init = left_bound->get_property ("line-break-system-details");
642 Prob *pl = make_paper_system (prop_init);
643 paper_system_set_stencil (pl, sys_stencil);
645 /* information that the page breaker might need */
646 Grob *right_bound = get_bound (RIGHT);
647 pl->set_property ("vertical-skylines", get_property ("vertical-skylines"));
648 pl->set_property ("page-break-permission", right_bound->get_property ("page-break-permission"));
649 pl->set_property ("page-turn-permission", right_bound->get_property ("page-turn-permission"));
650 pl->set_property ("page-break-penalty", right_bound->get_property ("page-break-penalty"));
651 pl->set_property ("page-turn-penalty", right_bound->get_property ("page-turn-penalty"));
653 if (right_bound->original () == dynamic_cast<System *> (original ())->get_bound (RIGHT))
654 pl->set_property ("last-in-score", SCM_BOOL_T);
656 Interval staff_refpoints;
657 if (Grob *align = unsmob<Grob> (get_object ("vertical-alignment")))
659 extract_grob_set (align, "elements", staves);
660 for (vsize i = 0; i < staves.size (); i++)
661 if (staves[i]->is_live ()
662 && Page_layout_problem::is_spaceable (staves[i]))
663 staff_refpoints.add_point (staves[i]->relative_coordinate (this,
667 pl->set_property ("staff-refpoint-extent", ly_interval2scm (staff_refpoints));
668 pl->set_property ("system-grob", self_scm ());
670 return pl->unprotect ();
674 System::broken_col_range (Item const *left, Item const *right) const
678 left = left->get_column ();
679 right = right->get_column ();
681 extract_grob_set (this, "columns", cols);
683 vsize i = Paper_column::get_rank (left);
684 int end_rank = Paper_column::get_rank (right);
685 if (i < cols.size ())
688 while (i < cols.size ()
689 && Paper_column::get_rank (cols[i]) < end_rank)
691 Paper_column *c = dynamic_cast<Paper_column *> (cols[i]);
692 if (Paper_column::is_breakable (c) && !c->get_system ())
700 /** Return all columns, but filter out any unused columns , since they might
701 disrupt the spacing problem. */
703 System::used_columns () const
705 extract_grob_set (this, "columns", ro_columns);
707 int last_breakable = ro_columns.size ();
709 while (last_breakable--)
711 if (Paper_column::is_breakable (ro_columns [last_breakable]))
715 vector<Grob *> columns;
716 for (int i = 0; i <= last_breakable; i++)
718 if (Paper_column::is_used (ro_columns[i]))
719 columns.push_back (ro_columns[i]);
726 System::column (vsize which) const
728 extract_grob_set (this, "columns", columns);
729 if (which >= columns.size ())
732 return dynamic_cast<Paper_column *> (columns[which]);
736 System::paper_score () const
742 System::get_rank () const
748 get_root_system (Grob *me)
750 Grob *system_grob = me;
752 while (system_grob->get_parent (Y_AXIS))
753 system_grob = system_grob->get_parent (Y_AXIS);
755 return dynamic_cast<System *> (system_grob);
758 MAKE_SCHEME_CALLBACK (System, get_vertical_alignment, 1);
760 System::get_vertical_alignment (SCM smob)
762 Grob *me = unsmob<Grob> (smob);
763 extract_grob_set (me, "elements", elts);
765 for (vsize i = 0; i < elts.size (); i++)
766 if (Align_interface::has_interface (elts[i]))
769 me->programming_error ("found multiple vertical alignments in this system");
775 me->programming_error ("didn't find a vertical alignment in this system");
778 return ret->self_scm ();
781 // Finds the furthest staff in the given direction whose x-extent
782 // overlaps with the given interval.
784 System::get_extremal_staff (Direction dir, Interval const &iv)
786 Grob *align = unsmob<Grob> (get_object ("vertical-alignment"));
790 extract_grob_set (align, "elements", elts);
791 vsize start = (dir == UP) ? 0 : elts.size () - 1;
792 vsize end = (dir == UP) ? elts.size () : VPOS;
793 for (vsize i = start; i != end; i += dir)
795 if (Hara_kiri_group_spanner::has_interface (elts[i]))
796 Hara_kiri_group_spanner::consider_suicide (elts[i]);
798 Interval intersection = elts[i]->extent (this, X_AXIS);
799 intersection.intersect (iv);
800 if (elts[i]->is_live () && !intersection.is_empty ())
806 // Finds the neighboring staff in the given direction over bounds
808 System::get_neighboring_staff (Direction dir, Grob *vertical_axis_group, Interval_t<int> bounds)
810 Grob *align = unsmob<Grob> (get_object ("vertical-alignment"));
814 extract_grob_set (align, "elements", elts);
815 vsize start = (dir == UP) ? 0 : elts.size () - 1;
816 vsize end = (dir == UP) ? elts.size () : VPOS;
820 for (vsize i = start; i != end; i += dir)
822 if (elts[i] == vertical_axis_group)
825 if (Hara_kiri_group_spanner::has_interface (elts[i]))
826 Hara_kiri_group_spanner::consider_suicide (elts[i]);
828 bounds.intersect (elts[i]->spanned_rank_interval ());
829 if (elts[i]->is_live () && !bounds.is_empty ())
837 System::pure_refpoint_extent (vsize start, vsize end)
840 Grob *alignment = unsmob<Grob> (get_object ("vertical-alignment"));
844 extract_grob_set (alignment, "elements", staves);
845 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
847 for (vsize i = 0; i < offsets.size (); ++i)
848 if (Page_layout_problem::is_spaceable (staves[i]))
850 ret[UP] = offsets[i];
854 for (vsize i = offsets.size (); i--;)
855 if (Page_layout_problem::is_spaceable (staves[i]))
857 ret[DOWN] = offsets[i];
865 System::part_of_line_pure_height (vsize start, vsize end, bool begin)
867 Grob *alignment = unsmob<Grob> (get_object ("vertical-alignment"));
871 extract_grob_set (alignment, "elements", staves);
872 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
875 for (vsize i = 0; i < staves.size (); ++i)
878 ? Axis_group_interface::begin_of_line_pure_height (staves[i], start)
879 : Axis_group_interface::rest_of_line_pure_height (staves[i], start, end);
880 if (i < offsets.size ())
881 iv.translate (offsets[i]);
885 Interval other_elements = begin
886 ? Axis_group_interface::begin_of_line_pure_height (this, start)
887 : Axis_group_interface::rest_of_line_pure_height (this, start, end);
889 ret.unite (other_elements);
895 System::begin_of_line_pure_height (vsize start, vsize end)
897 return part_of_line_pure_height (start, end, true);
901 System::rest_of_line_pure_height (vsize start, vsize end)
903 return part_of_line_pure_height (start, end, false);
906 // This differs from Axis_group_interface::calc_pure_relevant_grobs
907 // because here, we are only interested in those few elements that aren't
908 // descended from VerticalAlignment (ie. things like RehearsalMark, BarLine).
909 MAKE_SCHEME_CALLBACK (System, calc_pure_relevant_grobs, 1);
911 System::calc_pure_relevant_grobs (SCM smob)
913 Grob *me = unsmob<Grob> (smob);
915 extract_grob_set (me, "elements", elts);
916 vector<Grob *> relevant_grobs;
918 for (vsize i = 0; i < elts.size (); ++i)
920 if (!Axis_group_interface::has_interface (elts[i]))
922 relevant_grobs.push_back (elts[i]);
924 if (Item *it = dynamic_cast<Item *> (elts[i]))
926 for (LEFT_and_RIGHT (d))
928 Item *piece = it->find_prebroken_piece (d);
929 if (piece && piece->is_live ())
930 relevant_grobs.push_back (piece);
936 SCM grobs_scm = Grob_array::make_array ();
938 unsmob<Grob_array> (grobs_scm)->set_array (relevant_grobs);
942 MAKE_SCHEME_CALLBACK (System, height, 1);
944 System::height (SCM smob)
946 return Axis_group_interface::height (smob);
949 MAKE_SCHEME_CALLBACK (System, calc_pure_height, 3);
951 System::calc_pure_height (SCM smob, SCM start_scm, SCM end_scm)
953 System *me = unsmob<System> (smob);
954 int start = scm_to_int (start_scm);
955 int end = scm_to_int (end_scm);
957 Interval begin = me->begin_of_line_pure_height (start, end);
958 Interval rest = me->rest_of_line_pure_height (start, end);
961 return ly_interval2scm (begin);
965 System::get_pure_bound (Direction d, int start, int end)
967 vector<vsize> ranks = pscore_->get_break_ranks ();
968 vector<vsize> indices = pscore_->get_break_indices ();
969 vector<Grob *> cols = pscore_->get_columns ();
971 vsize target_rank = (d == LEFT ? start : end);
972 vector<vsize>::const_iterator i
973 = lower_bound (ranks.begin (), ranks.end (), target_rank, std::less<vsize> ());
975 if (i != ranks.end () && (*i) == target_rank)
976 return cols[indices[i - ranks.begin ()]];
982 System::get_maybe_pure_bound (Direction d, bool pure, int start, int end)
984 return pure ? get_pure_bound (d, start, end) : get_bound (d);
995 get_maybe_spaceable_staves (SCM smob, int filter)
997 System *me = unsmob<System> (smob);
998 Grob *align = unsmob<Grob> (me->get_object ("vertical_alignment"));
1004 extract_grob_set (align, "elements", staves);
1006 for (vsize i = 0; i < staves.size (); ++i)
1008 bool spaceable = Page_layout_problem::is_spaceable (staves[i]);
1009 if (staves[i]->is_live ()
1010 && ((filter == ALL_STAVES)
1011 || (filter == SPACEABLE_STAVES && spaceable)
1012 || (filter == NONSPACEABLE_STAVES && !spaceable)))
1014 *tail = scm_cons (staves[i]->self_scm (), SCM_EOL);
1015 tail = SCM_CDRLOC (*tail);
1023 MAKE_SCHEME_CALLBACK (System, get_staves, 1)
1025 System::get_staves (SCM smob)
1027 return get_maybe_spaceable_staves (smob, ALL_STAVES);
1030 MAKE_SCHEME_CALLBACK (System, get_spaceable_staves, 1)
1032 System::get_spaceable_staves (SCM smob)
1034 return get_maybe_spaceable_staves (smob, SPACEABLE_STAVES);
1037 MAKE_SCHEME_CALLBACK (System, get_nonspaceable_staves, 1)
1039 System::get_nonspaceable_staves (SCM smob)
1041 return get_maybe_spaceable_staves (smob, NONSPACEABLE_STAVES);
1044 ADD_INTERFACE (System,
1045 "This is the top-level object: Each object in a score"
1046 " ultimately has a @code{System} object as its X and"
1053 "footnotes-before-line-breaking "
1054 "footnotes-after-line-breaking "
1055 "in-note-direction "
1060 "vertical-alignment "