2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1996--2014 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"
44 System::System (System const &src)
53 System::System (SCM s)
62 System::init_elements ()
64 SCM scm_arr = Grob_array::make_array ();
65 all_elements_ = Grob_array::unsmob (scm_arr);
66 all_elements_->set_ordered (false);
67 set_object ("all-elements", scm_arr);
71 System::clone () const
73 return new System (*this);
77 System::element_count () const
79 return all_elements_->size ();
83 System::spanner_count () const
86 for (vsize i = all_elements_->size (); i--;)
87 if (dynamic_cast<Spanner *> (all_elements_->grob (i)))
93 System::typeset_grob (Grob *elem)
96 programming_error ("adding element twice");
99 elem->layout_ = pscore_->layout ();
100 all_elements_->add (elem);
106 System::derived_mark () const
108 if (!all_elements_->empty ())
110 Grob **ptr = &all_elements_->array_reference ()[0];
111 Grob **end = ptr + all_elements_->size ();
114 scm_gc_mark ((*ptr)->self_scm ());
120 scm_gc_mark (pscore_->self_scm ());
122 Spanner::derived_mark ();
126 fixup_refpoints (vector<Grob *> const &grobs)
128 for (vsize i = grobs.size (); i--;)
129 grobs[i]->fixup_refpoint ();
133 System::do_break_substitution_and_fixup_refpoints ()
135 for (vsize i = 0; i < all_elements_->size (); i++)
137 Grob *g = all_elements_->grob (i);
138 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
141 Kill no longer needed grobs.
143 Item *it = dynamic_cast<Item *> (g);
144 if (it && Item::is_non_musical (it))
146 it->find_prebroken_piece (LEFT)->suicide ();
147 it->find_prebroken_piece (RIGHT)->suicide ();
151 else if (g->is_live ())
152 g->do_break_processing ();
156 fixups must be done in broken line_of_scores, because new elements
157 are put over there. */
159 for (vsize i = 0; i < broken_intos_.size (); i++)
161 Grob *se = broken_intos_[i];
163 extract_grob_set (se, "all-elements", all_elts);
164 for (vsize j = 0; j < all_elts.size (); j++)
166 Grob *g = all_elts[j];
167 g->fixup_refpoint ();
170 count += all_elts.size ();
174 needed for doing items.
176 fixup_refpoints (all_elements_->array ());
178 for (vsize i = 0; i < all_elements_->size (); i++)
179 all_elements_->grob (i)->handle_broken_dependencies ();
181 handle_broken_dependencies ();
183 /* Because the this->get_property (all-elements) contains items in 3
184 versions, handle_broken_dependencies () will leave duplicated
185 items in all-elements. Strictly speaking this is harmless, but
186 it leads to duplicated symbols in the output. uniq makes sure
187 that no duplicates are in the list. */
188 for (vsize i = 0; i < broken_intos_.size (); i++)
190 System *child = dynamic_cast<System *> (broken_intos_[i]);
191 child->all_elements_->remove_duplicates ();
193 for (vsize j = 0; j < child->all_elements_->size (); j++)
195 Grob *g = child->all_elements_->grob (j);
197 (void) g->get_property ("after-line-breaking");
201 debug_output (_f ("Element count %d", count + element_count ()) + "\n");
205 System::get_broken_system_grobs ()
208 for (vsize i = 0; i < broken_intos_.size (); i++)
209 ret = scm_cons (broken_intos_[i]->self_scm (), ret);
210 return scm_reverse_x (ret, SCM_EOL);
214 System::get_paper_systems ()
216 SCM lines = scm_c_make_vector (broken_intos_.size (), SCM_EOL);
217 for (vsize i = 0; i < broken_intos_.size (); i++)
219 debug_output ("[", false);
221 System *system = dynamic_cast<System *> (broken_intos_[i]);
223 scm_vector_set_x (lines, scm_from_int (i),
224 system->get_paper_system ());
226 debug_output (::to_string (i) + "]", false);
232 System::get_footnote_grobs_in_range (vsize start, vsize end)
235 extract_grob_set (this, "footnotes-before-line-breaking", footnote_grobs);
236 for (vsize i = 0; i < footnote_grobs.size (); i++)
238 Grob *at_bat = footnote_grobs[i];
239 int pos = at_bat->spanned_rank_interval ()[LEFT];
240 bool end_of_line_visible = true;
241 if (Spanner *s = dynamic_cast<Spanner *>(at_bat))
243 Direction spanner_placement = robust_scm2dir (s->get_property ("spanner-placement"), LEFT);
244 if (spanner_placement == CENTER)
245 spanner_placement = LEFT;
247 pos = s->spanned_rank_interval ()[spanner_placement];
250 Spanner *orig = dynamic_cast<Spanner *>(s->original ());
251 at_bat = spanner_placement == LEFT ? orig->broken_intos_[0] : orig->broken_intos_.back ();
252 pos = at_bat->spanned_rank_interval ()[RIGHT];
256 if (Item *item = dynamic_cast<Item *>(at_bat))
259 We use this to weed out grobs that fall at the end
260 of the line when we want grobs at the beginning.
262 end_of_line_visible = item->break_status_dir () == LEFT;
264 if (!Item::break_visible (item))
266 // safeguard to bring down the column rank so that end of line footnotes show up on the correct line
267 if (pos == int (start) && item->break_status_dir () != RIGHT)
269 if (pos == int (end) && item->break_status_dir () != LEFT)
271 if (pos != int (end) && pos != int (start) && item->break_status_dir () != CENTER)
275 if (pos < int (start))
279 if (pos == int (start) && end_of_line_visible)
281 if (pos == int (end) && !end_of_line_visible)
283 if (!at_bat->is_live ())
287 Sometimes, there are duplicate entries in the all_elements_
288 list. In a separate patch, this practice should be squashed
289 so that the check below can be eliminated.
291 if (find (out.begin (), out.end (), at_bat) != out.end ())
294 out.push_back (at_bat);
300 System::get_footnote_heights_in_range (vsize start, vsize end)
302 return internal_get_note_heights_in_range (start, end, true);
306 System::get_in_note_heights_in_range (vsize start, vsize end)
308 return internal_get_note_heights_in_range (start, end, false);
312 System::internal_get_note_heights_in_range (vsize start, vsize end, bool foot)
314 vector<Grob *> footnote_grobs = get_footnote_grobs_in_range (start, end);
317 for (vsize i = footnote_grobs.size (); i--;)
319 ? !to_boolean (footnote_grobs[i]->get_property ("footnote"))
320 : to_boolean (footnote_grobs[i]->get_property ("footnote")))
321 footnote_grobs.erase (footnote_grobs.begin () + i);
323 for (vsize i = 0; i < footnote_grobs.size (); i++)
325 SCM footnote_markup = footnote_grobs[i]->get_property ("footnote-text");
327 if (!Text_interface::is_markup (footnote_markup))
330 SCM props = scm_call_1 (ly_lily_module_constant ("layout-extract-page-properties"),
331 pscore_->layout ()->self_scm ());
333 SCM footnote_stl = Text_interface::interpret_markup (pscore_->layout ()->self_scm (),
334 props, footnote_markup);
336 Stencil *footnote_stencil = Stencil::unsmob (footnote_stl);
337 out.push_back (footnote_stencil->extent (Y_AXIS).length ());
344 System::num_footnotes ()
346 extract_grob_set (this, "footnotes-after-line-breaking", footnote_grobs);
347 return footnote_grobs.size ();
351 grob_2D_less (Grob *g1, Grob *g2)
354 Grob *gs[] = {g1, g2};
356 for (int i = 0; i < 2; i++)
358 sri[i] = gs[i]->spanned_rank_interval ()[LEFT];
359 if (Spanner *s = dynamic_cast<Spanner *> (gs[i]))
361 if (s->broken_intos_.size ())
362 s = (scm_to_int (s->broken_intos_[0]->get_property ("spanner-placement")) == LEFT
363 ? s->broken_intos_[0]
364 : s->broken_intos_.back ());
366 if (robust_scm2double (s->get_property ("X-offset"), 0.0) > 0)
367 sri[i] = s->spanned_rank_interval ()[RIGHT];
371 if (sri[0] == sri[1])
372 return Grob::vertical_less (gs[0], gs[1]);
374 return sri[0] < sri[1];
377 MAKE_SCHEME_CALLBACK (System, footnotes_before_line_breaking, 1);
379 System::footnotes_before_line_breaking (SCM smob)
381 Grob *me = Grob::unsmob (smob);
382 vector<Grob *> footnotes;
383 SCM grobs_scm = Grob_array::make_array ();
384 extract_grob_set (me, "all-elements", elts);
385 for (vsize i = 0; i < elts.size (); i++)
386 if (elts[i]->internal_has_interface (ly_symbol2scm ("footnote-interface")))
387 footnotes.push_back (elts[i]);
389 Grob_array::unsmob (grobs_scm)->set_array (footnotes);
393 MAKE_SCHEME_CALLBACK (System, footnotes_after_line_breaking, 1);
395 System::footnotes_after_line_breaking (SCM smob)
397 Spanner *sys_span = Spanner::unsmob (smob);
398 System *sys = dynamic_cast<System *> (sys_span);
399 Interval_t<int> sri = sys->spanned_rank_interval ();
400 vector<Grob *> footnote_grobs = sys->get_footnote_grobs_in_range (sri[LEFT], sri[RIGHT]);
401 vector_sort (footnote_grobs, grob_2D_less);
403 SCM grobs_scm = Grob_array::make_array ();
404 Grob_array::unsmob (grobs_scm)->set_array (footnote_grobs);
408 MAKE_SCHEME_CALLBACK (System, vertical_skyline_elements, 1);
410 System::vertical_skyline_elements (SCM smob)
412 Grob *me_grob = Grob::unsmob (smob);
413 vector<Grob *> vertical_skyline_grobs;
414 extract_grob_set (me_grob, "elements", my_elts);
415 for (vsize i = 0; i < my_elts.size (); i++)
416 if (System_start_delimiter::has_interface (my_elts[i]))
417 vertical_skyline_grobs.push_back (my_elts[i]);
419 System *me = dynamic_cast<System *> (me_grob);
420 Grob *align = Grob::unsmob (me->get_object ("vertical-alignment"));
423 SCM grobs_scm = Grob_array::make_array ();
424 Grob_array::unsmob (grobs_scm)->set_array (vertical_skyline_grobs);
428 extract_grob_set (align, "elements", elts);
430 for (vsize i = 0; i < elts.size (); i++)
431 if (Hara_kiri_group_spanner::has_interface (elts[i]))
432 vertical_skyline_grobs.push_back (elts[i]);
434 SCM grobs_scm = Grob_array::make_array ();
435 Grob_array::unsmob (grobs_scm)->set_array (vertical_skyline_grobs);
440 System::break_into_pieces (vector<Column_x_positions> const &breaking)
442 for (vsize i = 0; i < breaking.size (); i++)
444 System *system = dynamic_cast<System *> (clone ());
445 system->rank_ = broken_intos_.size ();
447 vector<Grob *> c (breaking[i].cols_);
448 pscore_->typeset_system (system);
450 int st = Paper_column::get_rank (c[0]);
451 int end = Paper_column::get_rank (c.back ());
452 Interval iv (pure_height (this, st, end));
453 system->set_property ("pure-Y-extent", ly_interval2scm (iv));
455 system->set_bound (LEFT, c[0]);
456 system->set_bound (RIGHT, c.back ());
457 SCM system_labels = SCM_EOL;
458 for (vsize j = 0; j < c.size (); j++)
460 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
461 dynamic_cast<Paper_column *> (c[j])->set_system (system);
462 /* collect the column labels */
463 collect_labels (c[j], &system_labels);
466 Collect labels from any loose columns too: theses will be set on
467 an empty bar line or a column which is otherwise unused mid-line
469 vector<Grob *> loose (breaking[i].loose_cols_);
470 for (vsize j = 0; j < loose.size (); j++)
471 collect_labels (loose[j], &system_labels);
473 system->set_property ("labels", system_labels);
475 set_loose_columns (system, &breaking[i]);
476 broken_intos_.push_back (system);
481 System::collect_labels (Grob const *col, SCM *labels)
483 SCM col_labels = col->get_property ("labels");
484 if (scm_is_pair (col_labels))
485 *labels = scm_append (scm_list_2 (col_labels, *labels));
489 System::add_column (Paper_column *p)
492 Grob_array *ga = Grob_array::unsmob (me->get_object ("columns"));
495 SCM scm_ga = Grob_array::make_array ();
496 me->set_object ("columns", scm_ga);
497 ga = Grob_array::unsmob (scm_ga);
500 p->set_rank (ga->size ());
503 Axis_group_interface::add_element (this, p);
507 System::pre_processing ()
509 for (vsize i = 0; i < all_elements_->size (); i++)
510 all_elements_->grob (i)->discretionary_processing ();
512 debug_output (_f ("Grob count %d", element_count ()));
515 order is significant: broken grobs are added to the end of the
516 array, and should be processed before the original is potentially
519 for (vsize i = all_elements_->size (); i--;)
520 all_elements_->grob (i)->handle_prebroken_dependencies ();
522 fixup_refpoints (all_elements_->array ());
524 for (vsize i = 0; i < all_elements_->size (); i++)
526 Grob *g = all_elements_->grob (i);
527 (void) g->get_property ("before-line-breaking");
530 for (vsize i = 0; i < all_elements_->size (); i++)
532 Grob *e = all_elements_->grob (i);
533 (void) e->get_property ("springs-and-rods");
538 System::post_processing ()
540 Interval iv (extent (this, Y_AXIS));
542 programming_error ("system with empty extent");
544 translate_axis (-iv[MAX], Y_AXIS);
546 /* Generate all stencils to trigger font loads.
547 This might seem inefficient, but Stencils are cached per grob
550 vector<Grob *> all_elts_sorted (all_elements_->array ());
551 uniquify (all_elts_sorted);
552 this->get_stencil ();
553 for (vsize i = all_elts_sorted.size (); i--;)
555 Grob *g = all_elts_sorted[i];
567 operator < (Layer_entry const &a,
568 Layer_entry const &b)
570 return a.layer_ < b.layer_;
574 System::get_paper_system ()
581 vector<Layer_entry> entries;
582 for (vsize j = 0; j < all_elements_->size (); j++)
585 e.grob_ = all_elements_->grob (j);
586 e.layer_ = robust_scm2int (e.grob_->get_property ("layer"), 1);
588 entries.push_back (e);
591 vector_sort (entries, std::less<Layer_entry> ());
592 for (vsize j = 0; j < entries.size (); j++)
594 Grob *g = entries[j].grob_;
595 Stencil st = g->get_print_stencil ();
597 if (st.expr () == SCM_EOL)
601 for (int a = X_AXIS; a < NO_AXES; a++)
602 o[Axis (a)] = g->relative_coordinate (this, Axis (a));
604 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
606 * Staff_symbol_referencer::staff_space (g);
608 /* Must copy the stencil, for we cannot change the stencil
611 st.translate (o + extra);
613 *tail = scm_cons (st.expr (), SCM_EOL);
614 tail = SCM_CDRLOC (*tail);
617 if (Stencil *me = get_stencil ())
618 exprs = scm_cons (me->expr (), exprs);
620 Interval x (extent (this, X_AXIS));
621 Interval y (extent (this, Y_AXIS));
622 Stencil sys_stencil (Box (x, y),
623 scm_cons (ly_symbol2scm ("combine-stencil"),
627 Skyline_pair *skylines = Skyline_pair::unsmob (get_property ("vertical-skylines"));
631 = Lookup::points_to_line_stencil (0.1, (*skylines)[UP].to_points (X_AXIS));
633 = Lookup::points_to_line_stencil (0.1, (*skylines)[DOWN].to_points (X_AXIS));
634 sys_stencil.add_stencil (up.in_color (255, 0, 0));
635 sys_stencil.add_stencil (down.in_color (0, 255, 0));
639 Grob *left_bound = this->get_bound (LEFT);
640 SCM prop_init = left_bound->get_property ("line-break-system-details");
641 Prob *pl = make_paper_system (prop_init);
642 paper_system_set_stencil (pl, sys_stencil);
644 /* information that the page breaker might need */
645 Grob *right_bound = this->get_bound (RIGHT);
646 pl->set_property ("vertical-skylines", this->get_property ("vertical-skylines"));
647 pl->set_property ("page-break-permission", right_bound->get_property ("page-break-permission"));
648 pl->set_property ("page-turn-permission", right_bound->get_property ("page-turn-permission"));
649 pl->set_property ("page-break-penalty", right_bound->get_property ("page-break-penalty"));
650 pl->set_property ("page-turn-penalty", right_bound->get_property ("page-turn-penalty"));
652 if (right_bound->original () == dynamic_cast<System *> (original ())->get_bound (RIGHT))
653 pl->set_property ("last-in-score", SCM_BOOL_T);
655 Interval staff_refpoints;
656 if (Grob *align = Grob::unsmob (get_object ("vertical-alignment")))
658 extract_grob_set (align, "elements", staves);
659 for (vsize i = 0; i < staves.size (); i++)
660 if (staves[i]->is_live ()
661 && Page_layout_problem::is_spaceable (staves[i]))
662 staff_refpoints.add_point (staves[i]->relative_coordinate (this,
666 pl->set_property ("staff-refpoint-extent", ly_interval2scm (staff_refpoints));
667 pl->set_property ("system-grob", this->self_scm ());
669 return pl->unprotect ();
673 System::broken_col_range (Item const *left, Item const *right) const
677 left = left->get_column ();
678 right = right->get_column ();
680 extract_grob_set (this, "columns", cols);
682 vsize i = Paper_column::get_rank (left);
683 int end_rank = Paper_column::get_rank (right);
684 if (i < cols.size ())
687 while (i < cols.size ()
688 && Paper_column::get_rank (cols[i]) < end_rank)
690 Paper_column *c = dynamic_cast<Paper_column *> (cols[i]);
691 if (Paper_column::is_breakable (c) && !c->get_system ())
699 /** Return all columns, but filter out any unused columns , since they might
700 disrupt the spacing problem. */
702 System::used_columns () const
704 extract_grob_set (this, "columns", ro_columns);
706 int last_breakable = ro_columns.size ();
708 while (last_breakable--)
710 if (Paper_column::is_breakable (ro_columns [last_breakable]))
714 vector<Grob *> columns;
715 for (int i = 0; i <= last_breakable; i++)
717 if (Paper_column::is_used (ro_columns[i]))
718 columns.push_back (ro_columns[i]);
725 System::column (vsize which) const
727 extract_grob_set (this, "columns", columns);
728 if (which >= columns.size ())
731 return dynamic_cast<Paper_column *> (columns[which]);
735 System::paper_score () const
741 System::get_rank () const
747 get_root_system (Grob *me)
749 Grob *system_grob = me;
751 while (system_grob->get_parent (Y_AXIS))
752 system_grob = system_grob->get_parent (Y_AXIS);
754 return dynamic_cast<System *> (system_grob);
757 MAKE_SCHEME_CALLBACK (System, get_vertical_alignment, 1);
759 System::get_vertical_alignment (SCM smob)
761 Grob *me = Grob::unsmob (smob);
762 extract_grob_set (me, "elements", elts);
764 for (vsize i = 0; i < elts.size (); i++)
765 if (Align_interface::has_interface (elts[i]))
768 me->programming_error ("found multiple vertical alignments in this system");
774 me->programming_error ("didn't find a vertical alignment in this system");
777 return ret->self_scm ();
780 // Finds the furthest staff in the given direction whose x-extent
781 // overlaps with the given interval.
783 System::get_extremal_staff (Direction dir, Interval const &iv)
785 Grob *align = Grob::unsmob (get_object ("vertical-alignment"));
789 extract_grob_set (align, "elements", elts);
790 vsize start = (dir == UP) ? 0 : elts.size () - 1;
791 vsize end = (dir == UP) ? elts.size () : VPOS;
792 for (vsize i = start; i != end; i += dir)
794 if (Hara_kiri_group_spanner::has_interface (elts[i]))
795 Hara_kiri_group_spanner::consider_suicide (elts[i]);
797 Interval intersection = elts[i]->extent (this, X_AXIS);
798 intersection.intersect (iv);
799 if (elts[i]->is_live () && !intersection.is_empty ())
805 // Finds the neighboring staff in the given direction over bounds
807 System::get_neighboring_staff (Direction dir, Grob *vertical_axis_group, Interval_t<int> bounds)
809 Grob *align = Grob::unsmob (get_object ("vertical-alignment"));
813 extract_grob_set (align, "elements", elts);
814 vsize start = (dir == UP) ? 0 : elts.size () - 1;
815 vsize end = (dir == UP) ? elts.size () : VPOS;
819 for (vsize i = start; i != end; i += dir)
821 if (elts[i] == vertical_axis_group)
824 if (Hara_kiri_group_spanner::has_interface (elts[i]))
825 Hara_kiri_group_spanner::consider_suicide (elts[i]);
827 bounds.intersect (elts[i]->spanned_rank_interval ());
828 if (elts[i]->is_live () && !bounds.is_empty ())
836 System::pure_refpoint_extent (vsize start, vsize end)
839 Grob *alignment = Grob::unsmob (get_object ("vertical-alignment"));
843 extract_grob_set (alignment, "elements", staves);
844 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
846 for (vsize i = 0; i < offsets.size (); ++i)
847 if (Page_layout_problem::is_spaceable (staves[i]))
849 ret[UP] = offsets[i];
853 for (vsize i = offsets.size (); i--;)
854 if (Page_layout_problem::is_spaceable (staves[i]))
856 ret[DOWN] = offsets[i];
864 System::part_of_line_pure_height (vsize start, vsize end, bool begin)
866 Grob *alignment = Grob::unsmob (get_object ("vertical-alignment"));
870 extract_grob_set (alignment, "elements", staves);
871 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
874 for (vsize i = 0; i < staves.size (); ++i)
877 ? Axis_group_interface::begin_of_line_pure_height (staves[i], start)
878 : Axis_group_interface::rest_of_line_pure_height (staves[i], start, end);
879 if (i < offsets.size ())
880 iv.translate (offsets[i]);
884 Interval other_elements = begin
885 ? Axis_group_interface::begin_of_line_pure_height (this, start)
886 : Axis_group_interface::rest_of_line_pure_height (this, start, end);
888 ret.unite (other_elements);
894 System::begin_of_line_pure_height (vsize start, vsize end)
896 return part_of_line_pure_height (start, end, true);
900 System::rest_of_line_pure_height (vsize start, vsize end)
902 return part_of_line_pure_height (start, end, false);
905 // This differs from Axis_group_interface::calc_pure_relevant_grobs
906 // because here, we are only interested in those few elements that aren't
907 // descended from VerticalAlignment (ie. things like RehearsalMark, BarLine).
908 MAKE_SCHEME_CALLBACK (System, calc_pure_relevant_grobs, 1);
910 System::calc_pure_relevant_grobs (SCM smob)
912 Grob *me = Grob::unsmob (smob);
914 extract_grob_set (me, "elements", elts);
915 vector<Grob *> relevant_grobs;
917 for (vsize i = 0; i < elts.size (); ++i)
919 if (!Axis_group_interface::has_interface (elts[i]))
921 relevant_grobs.push_back (elts[i]);
923 if (Item *it = dynamic_cast<Item *> (elts[i]))
925 for (LEFT_and_RIGHT (d))
927 Item *piece = it->find_prebroken_piece (d);
928 if (piece && piece->is_live ())
929 relevant_grobs.push_back (piece);
935 SCM grobs_scm = Grob_array::make_array ();
937 Grob_array::unsmob (grobs_scm)->set_array (relevant_grobs);
941 MAKE_SCHEME_CALLBACK (System, height, 1);
943 System::height (SCM smob)
945 return Axis_group_interface::height (smob);
948 MAKE_SCHEME_CALLBACK (System, calc_pure_height, 3);
950 System::calc_pure_height (SCM smob, SCM start_scm, SCM end_scm)
952 System *me = dynamic_cast<System *> (Grob::unsmob (smob));
953 int start = scm_to_int (start_scm);
954 int end = scm_to_int (end_scm);
956 Interval begin = me->begin_of_line_pure_height (start, end);
957 Interval rest = me->rest_of_line_pure_height (start, end);
960 return ly_interval2scm (begin);
964 System::get_pure_bound (Direction d, int start, int end)
966 vector<vsize> ranks = pscore_->get_break_ranks ();
967 vector<vsize> indices = pscore_->get_break_indices ();
968 vector<Grob *> cols = pscore_->get_columns ();
970 vsize target_rank = (d == LEFT ? start : end);
971 vector<vsize>::const_iterator i
972 = lower_bound (ranks.begin (), ranks.end (), target_rank, std::less<vsize> ());
974 if (i != ranks.end () && (*i) == target_rank)
975 return cols[indices[i - ranks.begin ()]];
981 System::get_maybe_pure_bound (Direction d, bool pure, int start, int end)
983 return pure ? get_pure_bound (d, start, end) : get_bound (d);
994 get_maybe_spaceable_staves (SCM smob, int filter)
996 System *me = dynamic_cast<System *> (Grob::unsmob (smob));
997 Grob *align = Grob::unsmob (me->get_object ("vertical_alignment"));
1003 extract_grob_set (align, "elements", staves);
1005 for (vsize i = 0; i < staves.size (); ++i)
1007 bool spaceable = Page_layout_problem::is_spaceable (staves[i]);
1008 if (staves[i]->is_live ()
1009 && ((filter == ALL_STAVES)
1010 || (filter == SPACEABLE_STAVES && spaceable)
1011 || (filter == NONSPACEABLE_STAVES && !spaceable)))
1013 *tail = scm_cons (staves[i]->self_scm (), SCM_EOL);
1014 tail = SCM_CDRLOC (*tail);
1022 MAKE_SCHEME_CALLBACK (System, get_staves, 1)
1024 System::get_staves (SCM smob)
1026 return get_maybe_spaceable_staves (smob, ALL_STAVES);
1029 MAKE_SCHEME_CALLBACK (System, get_spaceable_staves, 1)
1031 System::get_spaceable_staves (SCM smob)
1033 return get_maybe_spaceable_staves (smob, SPACEABLE_STAVES);
1036 MAKE_SCHEME_CALLBACK (System, get_nonspaceable_staves, 1)
1038 System::get_nonspaceable_staves (SCM smob)
1040 return get_maybe_spaceable_staves (smob, NONSPACEABLE_STAVES);
1043 ADD_INTERFACE (System,
1044 "This is the top-level object: Each object in a score"
1045 " ultimately has a @code{System} object as its X and"
1052 "footnotes-before-line-breaking "
1053 "footnotes-after-line-breaking "
1054 "in-note-direction "
1059 "vertical-alignment "