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 const vector <Grob *> &arr = all_elements_->array ();
110 for (vsize i = arr.size (); i--;)
111 scm_gc_mark (arr[i]->self_scm ());
114 scm_gc_mark (pscore_->self_scm ());
116 Spanner::derived_mark ();
120 fixup_refpoints (vector<Grob *> const &grobs)
122 for (vsize i = grobs.size (); i--;)
123 grobs[i]->fixup_refpoint ();
127 System::do_break_substitution_and_fixup_refpoints ()
129 for (vsize i = 0; i < all_elements_->size (); i++)
131 Grob *g = all_elements_->grob (i);
132 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
135 Kill no longer needed grobs.
137 Item *it = dynamic_cast<Item *> (g);
138 if (it && Item::is_non_musical (it))
140 it->find_prebroken_piece (LEFT)->suicide ();
141 it->find_prebroken_piece (RIGHT)->suicide ();
145 else if (g->is_live ())
146 g->do_break_processing ();
150 fixups must be done in broken line_of_scores, because new elements
151 are put over there. */
153 for (vsize i = 0; i < broken_intos_.size (); i++)
155 Grob *se = broken_intos_[i];
157 extract_grob_set (se, "all-elements", all_elts);
158 for (vsize j = 0; j < all_elts.size (); j++)
160 Grob *g = all_elts[j];
161 g->fixup_refpoint ();
164 count += all_elts.size ();
168 needed for doing items.
170 fixup_refpoints (all_elements_->array ());
172 for (vsize i = 0; i < all_elements_->size (); i++)
173 all_elements_->grob (i)->handle_broken_dependencies ();
175 handle_broken_dependencies ();
177 /* Because the get_property (all-elements) contains items in 3
178 versions, handle_broken_dependencies () will leave duplicated
179 items in all-elements. Strictly speaking this is harmless, but
180 it leads to duplicated symbols in the output. uniq makes sure
181 that no duplicates are in the list. */
182 for (vsize i = 0; i < broken_intos_.size (); i++)
184 System *child = dynamic_cast<System *> (broken_intos_[i]);
185 child->all_elements_->remove_duplicates ();
187 for (vsize j = 0; j < child->all_elements_->size (); j++)
189 Grob *g = child->all_elements_->grob (j);
191 (void) g->get_property ("after-line-breaking");
195 debug_output (_f ("Element count %d", count + element_count ()) + "\n");
199 System::get_broken_system_grobs ()
202 for (vsize i = 0; i < broken_intos_.size (); i++)
203 ret = scm_cons (broken_intos_[i]->self_scm (), ret);
204 return scm_reverse_x (ret, SCM_EOL);
208 System::get_paper_systems ()
210 SCM lines = scm_c_make_vector (broken_intos_.size (), SCM_EOL);
211 for (vsize i = 0; i < broken_intos_.size (); i++)
213 debug_output ("[", false);
215 System *system = dynamic_cast<System *> (broken_intos_[i]);
217 scm_vector_set_x (lines, scm_from_int (i),
218 system->get_paper_system ());
220 debug_output (::to_string (i) + "]", false);
226 System::get_footnote_grobs_in_range (vsize start, vsize end)
229 extract_grob_set (this, "footnotes-before-line-breaking", footnote_grobs);
230 for (vsize i = 0; i < footnote_grobs.size (); i++)
232 Grob *at_bat = footnote_grobs[i];
233 int pos = at_bat->spanned_rank_interval ()[LEFT];
234 bool end_of_line_visible = true;
235 if (Spanner *s = dynamic_cast<Spanner *>(at_bat))
237 Direction spanner_placement = robust_scm2dir (s->get_property ("spanner-placement"), LEFT);
238 if (spanner_placement == CENTER)
239 spanner_placement = LEFT;
241 pos = s->spanned_rank_interval ()[spanner_placement];
244 Spanner *orig = dynamic_cast<Spanner *>(s->original ());
245 at_bat = spanner_placement == LEFT ? orig->broken_intos_[0] : orig->broken_intos_.back ();
246 pos = at_bat->spanned_rank_interval ()[RIGHT];
250 if (Item *item = dynamic_cast<Item *>(at_bat))
253 We use this to weed out grobs that fall at the end
254 of the line when we want grobs at the beginning.
256 end_of_line_visible = item->break_status_dir () == LEFT;
258 if (!Item::break_visible (item))
260 // safeguard to bring down the column rank so that end of line footnotes show up on the correct line
261 if (pos == int (start) && item->break_status_dir () != RIGHT)
263 if (pos == int (end) && item->break_status_dir () != LEFT)
265 if (pos != int (end) && pos != int (start) && item->break_status_dir () != CENTER)
269 if (pos < int (start))
273 if (pos == int (start) && end_of_line_visible)
275 if (pos == int (end) && !end_of_line_visible)
277 if (!at_bat->is_live ())
281 Sometimes, there are duplicate entries in the all_elements_
282 list. In a separate patch, this practice should be squashed
283 so that the check below can be eliminated.
285 if (find (out.begin (), out.end (), at_bat) != out.end ())
288 out.push_back (at_bat);
294 System::get_footnote_heights_in_range (vsize start, vsize end)
296 return internal_get_note_heights_in_range (start, end, true);
300 System::get_in_note_heights_in_range (vsize start, vsize end)
302 return internal_get_note_heights_in_range (start, end, false);
306 System::internal_get_note_heights_in_range (vsize start, vsize end, bool foot)
308 vector<Grob *> footnote_grobs = get_footnote_grobs_in_range (start, end);
311 for (vsize i = footnote_grobs.size (); i--;)
313 ? !to_boolean (footnote_grobs[i]->get_property ("footnote"))
314 : to_boolean (footnote_grobs[i]->get_property ("footnote")))
315 footnote_grobs.erase (footnote_grobs.begin () + i);
317 for (vsize i = 0; i < footnote_grobs.size (); i++)
319 SCM footnote_markup = footnote_grobs[i]->get_property ("footnote-text");
321 if (!Text_interface::is_markup (footnote_markup))
325 Lily::layout_extract_page_properties (pscore_->layout ()->self_scm ());
327 SCM footnote_stl = Text_interface::interpret_markup (pscore_->layout ()->self_scm (),
328 props, footnote_markup);
330 Stencil *footnote_stencil = unsmob<Stencil> (footnote_stl);
331 out.push_back (footnote_stencil->extent (Y_AXIS).length ());
338 System::num_footnotes ()
340 extract_grob_set (this, "footnotes-after-line-breaking", footnote_grobs);
341 return footnote_grobs.size ();
345 grob_2D_less (Grob *g1, Grob *g2)
348 Grob *gs[] = {g1, g2};
350 for (int i = 0; i < 2; i++)
352 sri[i] = gs[i]->spanned_rank_interval ()[LEFT];
353 if (Spanner *s = dynamic_cast<Spanner *> (gs[i]))
355 if (s->broken_intos_.size ())
356 s = (scm_to_int (s->broken_intos_[0]->get_property ("spanner-placement")) == LEFT
357 ? s->broken_intos_[0]
358 : s->broken_intos_.back ());
360 if (robust_scm2double (s->get_property ("X-offset"), 0.0) > 0)
361 sri[i] = s->spanned_rank_interval ()[RIGHT];
365 if (sri[0] == sri[1])
366 return Grob::vertical_less (gs[0], gs[1]);
368 return sri[0] < sri[1];
371 MAKE_SCHEME_CALLBACK (System, footnotes_before_line_breaking, 1);
373 System::footnotes_before_line_breaking (SCM smob)
375 Grob *me = unsmob<Grob> (smob);
376 vector<Grob *> footnotes;
377 SCM grobs_scm = Grob_array::make_array ();
378 extract_grob_set (me, "all-elements", elts);
379 for (vsize i = 0; i < elts.size (); i++)
380 if (elts[i]->internal_has_interface (ly_symbol2scm ("footnote-interface")))
381 footnotes.push_back (elts[i]);
383 unsmob<Grob_array> (grobs_scm)->set_array (footnotes);
387 MAKE_SCHEME_CALLBACK (System, footnotes_after_line_breaking, 1);
389 System::footnotes_after_line_breaking (SCM smob)
391 Spanner *sys_span = unsmob<Spanner> (smob);
392 System *sys = dynamic_cast<System *> (sys_span);
393 Interval_t<int> sri = sys->spanned_rank_interval ();
394 vector<Grob *> footnote_grobs = sys->get_footnote_grobs_in_range (sri[LEFT], sri[RIGHT]);
395 vector_sort (footnote_grobs, grob_2D_less);
397 SCM grobs_scm = Grob_array::make_array ();
398 unsmob<Grob_array> (grobs_scm)->set_array (footnote_grobs);
402 MAKE_SCHEME_CALLBACK (System, vertical_skyline_elements, 1);
404 System::vertical_skyline_elements (SCM smob)
406 Grob *me_grob = unsmob<Grob> (smob);
407 vector<Grob *> vertical_skyline_grobs;
408 extract_grob_set (me_grob, "elements", my_elts);
409 for (vsize i = 0; i < my_elts.size (); i++)
410 if (has_interface<System_start_delimiter> (my_elts[i]))
411 vertical_skyline_grobs.push_back (my_elts[i]);
413 System *me = dynamic_cast<System *> (me_grob);
414 Grob *align = unsmob<Grob> (me->get_object ("vertical-alignment"));
417 SCM grobs_scm = Grob_array::make_array ();
418 unsmob<Grob_array> (grobs_scm)->set_array (vertical_skyline_grobs);
422 extract_grob_set (align, "elements", elts);
424 for (vsize i = 0; i < elts.size (); i++)
425 if (has_interface<Hara_kiri_group_spanner> (elts[i]))
426 vertical_skyline_grobs.push_back (elts[i]);
428 SCM grobs_scm = Grob_array::make_array ();
429 unsmob<Grob_array> (grobs_scm)->set_array (vertical_skyline_grobs);
434 System::break_into_pieces (vector<Column_x_positions> const &breaking)
436 for (vsize i = 0; i < breaking.size (); i++)
438 System *system = dynamic_cast<System *> (clone ());
439 system->rank_ = broken_intos_.size ();
441 vector<Grob *> c (breaking[i].cols_);
442 pscore_->typeset_system (system);
444 int st = Paper_column::get_rank (c[0]);
445 int end = Paper_column::get_rank (c.back ());
446 Interval iv (pure_y_extent (this, st, end));
447 system->set_property ("pure-Y-extent", ly_interval2scm (iv));
449 system->set_bound (LEFT, c[0]);
450 system->set_bound (RIGHT, c.back ());
451 SCM system_labels = SCM_EOL;
452 for (vsize j = 0; j < c.size (); j++)
454 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
455 dynamic_cast<Paper_column *> (c[j])->set_system (system);
456 /* collect the column labels */
457 collect_labels (c[j], &system_labels);
460 Collect labels from any loose columns too: theses will be set on
461 an empty bar line or a column which is otherwise unused mid-line
463 vector<Grob *> loose (breaking[i].loose_cols_);
464 for (vsize j = 0; j < loose.size (); j++)
465 collect_labels (loose[j], &system_labels);
467 system->set_property ("labels", system_labels);
469 set_loose_columns (system, &breaking[i]);
470 broken_intos_.push_back (system);
475 System::collect_labels (Grob const *col, SCM *labels)
477 SCM col_labels = col->get_property ("labels");
478 if (scm_is_pair (col_labels))
479 *labels = scm_append (scm_list_2 (col_labels, *labels));
483 System::add_column (Paper_column *p)
486 Grob_array *ga = unsmob<Grob_array> (me->get_object ("columns"));
489 SCM scm_ga = Grob_array::make_array ();
490 me->set_object ("columns", scm_ga);
491 ga = unsmob<Grob_array> (scm_ga);
494 p->set_rank (ga->size ());
497 Axis_group_interface::add_element (this, p);
501 System::pre_processing ()
503 for (vsize i = 0; i < all_elements_->size (); i++)
504 all_elements_->grob (i)->discretionary_processing ();
506 debug_output (_f ("Grob count %d", element_count ()));
509 order is significant: broken grobs are added to the end of the
510 array, and should be processed before the original is potentially
513 for (vsize i = all_elements_->size (); i--;)
514 all_elements_->grob (i)->handle_prebroken_dependencies ();
516 fixup_refpoints (all_elements_->array ());
518 for (vsize i = 0; i < all_elements_->size (); i++)
520 Grob *g = all_elements_->grob (i);
521 (void) g->get_property ("before-line-breaking");
524 for (vsize i = 0; i < all_elements_->size (); i++)
526 Grob *e = all_elements_->grob (i);
527 (void) e->get_property ("springs-and-rods");
532 System::post_processing ()
534 Interval iv (extent (this, Y_AXIS));
536 programming_error ("system with empty extent");
538 translate_axis (-iv[MAX], Y_AXIS);
540 /* Generate all stencils to trigger font loads.
541 This might seem inefficient, but Stencils are cached per grob
544 vector<Grob *> all_elts_sorted (all_elements_->array ());
545 uniquify (all_elts_sorted);
547 for (vsize i = all_elts_sorted.size (); i--;)
549 Grob *g = all_elts_sorted[i];
561 operator < (Layer_entry const &a,
562 Layer_entry const &b)
564 return a.layer_ < b.layer_;
568 System::get_paper_system ()
575 vector<Layer_entry> entries;
576 for (vsize j = 0; j < all_elements_->size (); j++)
579 e.grob_ = all_elements_->grob (j);
580 e.layer_ = robust_scm2int (e.grob_->get_property ("layer"), 1);
582 entries.push_back (e);
585 vector_sort (entries, std::less<Layer_entry> ());
586 for (vsize j = 0; j < entries.size (); j++)
588 Grob *g = entries[j].grob_;
589 Stencil st = g->get_print_stencil ();
591 if (scm_is_null (st.expr ()))
595 for (int a = X_AXIS; a < NO_AXES; a++)
596 o[Axis (a)] = g->relative_coordinate (this, Axis (a));
598 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
600 * Staff_symbol_referencer::staff_space (g);
602 /* Must copy the stencil, for we cannot change the stencil
605 st.translate (o + extra);
607 *tail = scm_cons (st.expr (), SCM_EOL);
608 tail = SCM_CDRLOC (*tail);
611 if (Stencil *me = get_stencil ())
612 exprs = scm_cons (me->expr (), exprs);
614 Interval x (extent (this, X_AXIS));
615 Interval y (extent (this, Y_AXIS));
616 Stencil sys_stencil (Box (x, y),
617 scm_cons (ly_symbol2scm ("combine-stencil"),
621 Skyline_pair *skylines = unsmob<Skyline_pair> (get_property ("vertical-skylines"));
625 = Lookup::points_to_line_stencil (0.1, (*skylines)[UP].to_points (X_AXIS));
627 = Lookup::points_to_line_stencil (0.1, (*skylines)[DOWN].to_points (X_AXIS));
628 sys_stencil.add_stencil (up.in_color (1.0, 0.0, 0.0));
629 sys_stencil.add_stencil (down.in_color (0.0, 1.0, 0.0));
633 Grob *left_bound = get_bound (LEFT);
634 SCM prop_init = left_bound->get_property ("line-break-system-details");
635 Prob *pl = make_paper_system (prop_init);
636 paper_system_set_stencil (pl, sys_stencil);
638 /* information that the page breaker might need */
639 Grob *right_bound = get_bound (RIGHT);
640 pl->set_property ("vertical-skylines", get_property ("vertical-skylines"));
641 pl->set_property ("page-break-permission", right_bound->get_property ("page-break-permission"));
642 pl->set_property ("page-turn-permission", right_bound->get_property ("page-turn-permission"));
643 pl->set_property ("page-break-penalty", right_bound->get_property ("page-break-penalty"));
644 pl->set_property ("page-turn-penalty", right_bound->get_property ("page-turn-penalty"));
646 if (right_bound->original () == dynamic_cast<System *> (original ())->get_bound (RIGHT))
647 pl->set_property ("last-in-score", SCM_BOOL_T);
649 Interval staff_refpoints;
650 if (Grob *align = unsmob<Grob> (get_object ("vertical-alignment")))
652 extract_grob_set (align, "elements", staves);
653 for (vsize i = 0; i < staves.size (); i++)
654 if (staves[i]->is_live ()
655 && Page_layout_problem::is_spaceable (staves[i]))
656 staff_refpoints.add_point (staves[i]->relative_coordinate (this,
660 pl->set_property ("staff-refpoint-extent", ly_interval2scm (staff_refpoints));
661 pl->set_property ("system-grob", self_scm ());
663 return pl->unprotect ();
667 System::broken_col_range (Item const *left, Item const *right) const
671 left = left->get_column ();
672 right = right->get_column ();
674 extract_grob_set (this, "columns", cols);
676 vsize i = Paper_column::get_rank (left);
677 int end_rank = Paper_column::get_rank (right);
678 if (i < cols.size ())
681 while (i < cols.size ()
682 && Paper_column::get_rank (cols[i]) < end_rank)
684 Paper_column *c = dynamic_cast<Paper_column *> (cols[i]);
685 if (Paper_column::is_breakable (c) && !c->get_system ())
693 /** Return all columns, but filter out any unused columns , since they might
694 disrupt the spacing problem. */
696 System::used_columns () const
698 extract_grob_set (this, "columns", ro_columns);
700 int last_breakable = ro_columns.size ();
702 while (last_breakable--)
704 if (Paper_column::is_breakable (ro_columns [last_breakable]))
708 vector<Grob *> columns;
709 for (int i = 0; i <= last_breakable; i++)
711 if (Paper_column::is_used (ro_columns[i]))
712 columns.push_back (ro_columns[i]);
719 System::column (vsize which) const
721 extract_grob_set (this, "columns", columns);
722 if (which >= columns.size ())
725 return dynamic_cast<Paper_column *> (columns[which]);
729 System::paper_score () const
735 System::get_rank () const
741 get_root_system (Grob *me)
743 Grob *system_grob = me;
745 while (system_grob->get_parent (Y_AXIS))
746 system_grob = system_grob->get_parent (Y_AXIS);
748 return dynamic_cast<System *> (system_grob);
751 MAKE_SCHEME_CALLBACK (System, get_vertical_alignment, 1);
753 System::get_vertical_alignment (SCM smob)
755 Grob *me = unsmob<Grob> (smob);
756 extract_grob_set (me, "elements", elts);
758 for (vsize i = 0; i < elts.size (); i++)
759 if (has_interface<Align_interface> (elts[i]))
762 me->programming_error ("found multiple vertical alignments in this system");
768 me->programming_error ("didn't find a vertical alignment in this system");
771 return ret->self_scm ();
774 // Finds the furthest staff in the given direction whose x-extent
775 // overlaps with the given interval.
777 System::get_extremal_staff (Direction dir, Interval const &iv)
779 Grob *align = unsmob<Grob> (get_object ("vertical-alignment"));
783 extract_grob_set (align, "elements", elts);
784 vsize start = (dir == UP) ? 0 : elts.size () - 1;
785 vsize end = (dir == UP) ? elts.size () : VPOS;
786 for (vsize i = start; i != end; i += dir)
788 if (has_interface<Hara_kiri_group_spanner> (elts[i]))
789 Hara_kiri_group_spanner::consider_suicide (elts[i]);
791 Interval intersection = elts[i]->extent (this, X_AXIS);
792 intersection.intersect (iv);
793 if (elts[i]->is_live () && !intersection.is_empty ())
799 // Finds the neighboring staff in the given direction over bounds
801 System::get_neighboring_staff (Direction dir, Grob *vertical_axis_group, Interval_t<int> bounds)
803 Grob *align = unsmob<Grob> (get_object ("vertical-alignment"));
807 extract_grob_set (align, "elements", elts);
808 vsize start = (dir == UP) ? 0 : elts.size () - 1;
809 vsize end = (dir == UP) ? elts.size () : VPOS;
813 for (vsize i = start; i != end; i += dir)
815 if (elts[i] == vertical_axis_group)
818 if (has_interface<Hara_kiri_group_spanner> (elts[i]))
819 Hara_kiri_group_spanner::consider_suicide (elts[i]);
821 bounds.intersect (elts[i]->spanned_rank_interval ());
822 if (elts[i]->is_live () && !bounds.is_empty ())
830 System::pure_refpoint_extent (vsize start, vsize end)
833 Grob *alignment = unsmob<Grob> (get_object ("vertical-alignment"));
837 extract_grob_set (alignment, "elements", staves);
838 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
840 for (vsize i = 0; i < offsets.size (); ++i)
841 if (Page_layout_problem::is_spaceable (staves[i]))
843 ret[UP] = offsets[i];
847 for (vsize i = offsets.size (); i--;)
848 if (Page_layout_problem::is_spaceable (staves[i]))
850 ret[DOWN] = offsets[i];
858 System::part_of_line_pure_height (vsize start, vsize end, bool begin)
860 Grob *alignment = unsmob<Grob> (get_object ("vertical-alignment"));
864 extract_grob_set (alignment, "elements", staves);
865 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
868 for (vsize i = 0; i < staves.size (); ++i)
871 ? Axis_group_interface::begin_of_line_pure_height (staves[i], start)
872 : Axis_group_interface::rest_of_line_pure_height (staves[i], start, end);
873 if (i < offsets.size ())
874 iv.translate (offsets[i]);
878 Interval other_elements = begin
879 ? Axis_group_interface::begin_of_line_pure_height (this, start)
880 : Axis_group_interface::rest_of_line_pure_height (this, start, end);
882 ret.unite (other_elements);
888 System::begin_of_line_pure_height (vsize start, vsize end)
890 return part_of_line_pure_height (start, end, true);
894 System::rest_of_line_pure_height (vsize start, vsize end)
896 return part_of_line_pure_height (start, end, false);
899 // This differs from Axis_group_interface::calc_pure_relevant_grobs
900 // because here, we are only interested in those few elements that aren't
901 // descended from VerticalAlignment (ie. things like RehearsalMark, BarLine).
902 MAKE_SCHEME_CALLBACK (System, calc_pure_relevant_grobs, 1);
904 System::calc_pure_relevant_grobs (SCM smob)
906 Grob *me = unsmob<Grob> (smob);
908 extract_grob_set (me, "elements", elts);
909 vector<Grob *> relevant_grobs;
911 for (vsize i = 0; i < elts.size (); ++i)
913 if (!has_interface<Axis_group_interface> (elts[i]))
915 relevant_grobs.push_back (elts[i]);
917 if (Item *it = dynamic_cast<Item *> (elts[i]))
919 for (LEFT_and_RIGHT (d))
921 Item *piece = it->find_prebroken_piece (d);
922 if (piece && piece->is_live ())
923 relevant_grobs.push_back (piece);
929 SCM grobs_scm = Grob_array::make_array ();
931 unsmob<Grob_array> (grobs_scm)->set_array (relevant_grobs);
935 MAKE_SCHEME_CALLBACK (System, height, 1);
937 System::height (SCM smob)
939 return Axis_group_interface::height (smob);
942 MAKE_SCHEME_CALLBACK (System, calc_pure_height, 3);
944 System::calc_pure_height (SCM smob, SCM start_scm, SCM end_scm)
946 System *me = unsmob<System> (smob);
947 int start = scm_to_int (start_scm);
948 int end = scm_to_int (end_scm);
950 Interval begin = me->begin_of_line_pure_height (start, end);
951 Interval rest = me->rest_of_line_pure_height (start, end);
954 return ly_interval2scm (begin);
958 System::get_pure_bound (Direction d, int start, int end)
960 vector<vsize> ranks = pscore_->get_break_ranks ();
961 vector<vsize> indices = pscore_->get_break_indices ();
962 vector<Grob *> cols = pscore_->get_columns ();
964 vsize target_rank = (d == LEFT ? start : end);
965 vector<vsize>::const_iterator i
966 = lower_bound (ranks.begin (), ranks.end (), target_rank, std::less<vsize> ());
968 if (i != ranks.end () && (*i) == target_rank)
969 return cols[indices[i - ranks.begin ()]];
975 System::get_maybe_pure_bound (Direction d, bool pure, int start, int end)
977 return pure ? get_pure_bound (d, start, end) : get_bound (d);
988 get_maybe_spaceable_staves (SCM smob, int filter)
990 System *me = unsmob<System> (smob);
991 Grob *align = unsmob<Grob> (me->get_object ("vertical_alignment"));
997 extract_grob_set (align, "elements", staves);
999 for (vsize i = 0; i < staves.size (); ++i)
1001 bool spaceable = Page_layout_problem::is_spaceable (staves[i]);
1002 if (staves[i]->is_live ()
1003 && ((filter == ALL_STAVES)
1004 || (filter == SPACEABLE_STAVES && spaceable)
1005 || (filter == NONSPACEABLE_STAVES && !spaceable)))
1007 *tail = scm_cons (staves[i]->self_scm (), SCM_EOL);
1008 tail = SCM_CDRLOC (*tail);
1016 MAKE_SCHEME_CALLBACK (System, get_staves, 1)
1018 System::get_staves (SCM smob)
1020 return get_maybe_spaceable_staves (smob, ALL_STAVES);
1023 MAKE_SCHEME_CALLBACK (System, get_spaceable_staves, 1)
1025 System::get_spaceable_staves (SCM smob)
1027 return get_maybe_spaceable_staves (smob, SPACEABLE_STAVES);
1030 MAKE_SCHEME_CALLBACK (System, get_nonspaceable_staves, 1)
1032 System::get_nonspaceable_staves (SCM smob)
1034 return get_maybe_spaceable_staves (smob, NONSPACEABLE_STAVES);
1037 ADD_INTERFACE (System,
1038 "This is the top-level object: Each object in a score"
1039 " ultimately has a @code{System} object as its X and"
1046 "footnotes-before-line-breaking "
1047 "footnotes-after-line-breaking "
1048 "in-note-direction "
1053 "vertical-alignment "