2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1996--2011 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 "column-description.hh"
27 #include "grob-array.hh"
28 #include "hara-kiri-group-spanner.hh"
29 #include "international.hh"
32 #include "output-def.hh"
33 #include "page-layout-problem.hh"
34 #include "paper-column.hh"
35 #include "paper-score.hh"
36 #include "paper-system.hh"
37 #include "pointer-group-interface.hh"
38 #include "skyline-pair.hh"
39 #include "staff-symbol-referencer.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_ = unsmob_grob_array (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 (ret);
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))
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 ())
280 out.push_back (at_bat);
286 System::get_footnote_heights_in_range (vsize start, vsize end)
288 return internal_get_note_heights_in_range (start, end, true);
292 System::get_in_note_heights_in_range (vsize start, vsize end)
294 return internal_get_note_heights_in_range (start, end, false);
298 System::internal_get_note_heights_in_range (vsize start, vsize end, bool foot)
300 vector<Grob *> footnote_grobs = get_footnote_grobs_in_range (start, end);
303 for (vsize i = footnote_grobs.size (); i--;)
305 ? !to_boolean (footnote_grobs[i]->get_property ("footnote"))
306 : to_boolean (footnote_grobs[i]->get_property ("footnote")))
307 footnote_grobs.erase (footnote_grobs.begin () + i);
309 for (vsize i = 0; i < footnote_grobs.size (); i++)
311 SCM footnote_markup = footnote_grobs[i]->get_property ("footnote-text");
313 if (!Text_interface::is_markup (footnote_markup))
316 SCM props = scm_call_1 (ly_lily_module_constant ("layout-extract-page-properties"),
317 pscore_->layout ()->self_scm ());
319 SCM footnote_stl = Text_interface::interpret_markup (pscore_->layout ()->self_scm (),
320 props, footnote_markup);
322 Stencil *footnote_stencil = unsmob_stencil (footnote_stl);
323 out.push_back (footnote_stencil->extent (Y_AXIS).length ());
330 System::num_footnotes ()
332 extract_grob_set (this, "footnotes-after-line-breaking", footnote_grobs);
333 return footnote_grobs.size ();
337 grob_2D_less (Grob *g1, Grob *g2)
340 Grob *gs[] = {g1, g2};
342 for (int i = 0; i < 2; i++)
344 sri[i] = gs[i]->spanned_rank_interval ()[LEFT];
345 if (Spanner *s = dynamic_cast<Spanner *> (gs[i]))
347 if (s->broken_intos_.size ())
348 s = (scm_to_int (s->broken_intos_[0]->get_property ("spanner-placement")) == LEFT
349 ? s->broken_intos_[0]
350 : s->broken_intos_.back ());
352 if (robust_scm2double (s->get_property ("X-offset"), 0.0) > 0)
353 sri[i] = s->spanned_rank_interval ()[RIGHT];
357 if (sri[0] == sri[1])
358 return Grob::vertical_less (gs[0], gs[1]);
360 return sri[0] < sri[1];
363 MAKE_SCHEME_CALLBACK (System, footnotes_before_line_breaking, 1);
365 System::footnotes_before_line_breaking (SCM smob)
367 Grob *me = unsmob_grob (smob);
368 vector<Grob *> footnotes;
369 SCM grobs_scm = Grob_array::make_array ();
370 extract_grob_set (me, "all-elements", elts);
371 for (vsize i = 0; i < elts.size (); i++)
372 if (elts[i]->internal_has_interface (ly_symbol2scm ("footnote-interface")))
373 footnotes.push_back (elts[i]);
375 unsmob_grob_array (grobs_scm)->set_array (footnotes);
379 MAKE_SCHEME_CALLBACK (System, footnotes_after_line_breaking, 1);
381 System::footnotes_after_line_breaking (SCM smob)
383 Spanner *sys_span = unsmob_spanner (smob);
384 System *sys = dynamic_cast<System *> (sys_span);
385 Interval_t<int> sri = sys->spanned_rank_interval ();
386 vector<Grob *> footnote_grobs = sys->get_footnote_grobs_in_range (sri[LEFT], sri[RIGHT]);
387 vector_sort (footnote_grobs, grob_2D_less);
389 SCM grobs_scm = Grob_array::make_array ();
390 unsmob_grob_array (grobs_scm)->set_array (footnote_grobs);
395 System::break_into_pieces (vector<Column_x_positions> const &breaking)
397 for (vsize i = 0; i < breaking.size (); i++)
399 System *system = dynamic_cast<System *> (clone ());
400 system->rank_ = broken_intos_.size ();
402 vector<Grob *> c (breaking[i].cols_);
403 pscore_->typeset_system (system);
405 int st = Paper_column::get_rank (c[0]);
406 int end = Paper_column::get_rank (c.back ());
407 Interval iv (pure_height (this, st, end));
408 system->set_property ("pure-Y-extent", ly_interval2scm (iv));
410 system->set_bound (LEFT, c[0]);
411 system->set_bound (RIGHT, c.back ());
412 SCM system_labels = SCM_EOL;
413 for (vsize j = 0; j < c.size (); j++)
415 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
416 dynamic_cast<Paper_column *> (c[j])->set_system (system);
417 /* collect the column labels */
418 collect_labels (c[j], &system_labels);
421 Collect labels from any loose columns too: theses will be set on
422 an empty bar line or a column which is otherwise unused mid-line
424 vector<Grob *> loose (breaking[i].loose_cols_);
425 for (vsize j = 0; j < loose.size (); j++)
426 collect_labels (loose[j], &system_labels);
428 system->set_property ("labels", system_labels);
430 set_loose_columns (system, &breaking[i]);
431 broken_intos_.push_back (system);
436 System::collect_labels (Grob const *col, SCM *labels)
438 SCM col_labels = col->get_property ("labels");
439 if (scm_is_pair (col_labels))
440 *labels = scm_append (scm_list_2 (col_labels, *labels));
444 System::add_column (Paper_column *p)
447 Grob_array *ga = unsmob_grob_array (me->get_object ("columns"));
450 SCM scm_ga = Grob_array::make_array ();
451 me->set_object ("columns", scm_ga);
452 ga = unsmob_grob_array (scm_ga);
455 p->set_rank (ga->size ());
458 Axis_group_interface::add_element (this, p);
462 System::pre_processing ()
464 for (vsize i = 0; i < all_elements_->size (); i++)
465 all_elements_->grob (i)->discretionary_processing ();
467 debug_output (_f ("Grob count %d", element_count ()));
470 order is significant: broken grobs are added to the end of the
471 array, and should be processed before the original is potentially
474 for (vsize i = all_elements_->size (); i--;)
475 all_elements_->grob (i)->handle_prebroken_dependencies ();
477 fixup_refpoints (all_elements_->array ());
479 for (vsize i = 0; i < all_elements_->size (); i++)
481 Grob *g = all_elements_->grob (i);
482 (void) g->get_property ("before-line-breaking");
485 for (vsize i = 0; i < all_elements_->size (); i++)
487 Grob *e = all_elements_->grob (i);
488 (void) e->get_property ("springs-and-rods");
493 System::post_processing ()
495 Interval iv (extent (this, Y_AXIS));
497 programming_error ("system with empty extent");
499 translate_axis (-iv[MAX], Y_AXIS);
501 /* Generate all stencils to trigger font loads.
502 This might seem inefficient, but Stencils are cached per grob
505 vector<Grob *> all_elts_sorted (all_elements_->array ());
506 vector_sort (all_elts_sorted, std::less<Grob *> ());
507 uniq (all_elts_sorted);
508 this->get_stencil ();
509 for (vsize i = all_elts_sorted.size (); i--;)
511 Grob *g = all_elts_sorted[i];
523 operator < (Layer_entry const &a,
524 Layer_entry const &b)
526 return a.layer_ < b.layer_;
530 System::get_paper_system ()
537 vector<Layer_entry> entries;
538 for (vsize j = 0; j < all_elements_->size (); j++)
541 e.grob_ = all_elements_->grob (j);
542 e.layer_ = robust_scm2int (e.grob_->get_property ("layer"), 1);
544 entries.push_back (e);
547 vector_sort (entries, std::less<Layer_entry> ());
548 for (vsize j = 0; j < entries.size (); j++)
550 Grob *g = entries[j].grob_;
551 Stencil st = g->get_print_stencil ();
553 if (st.expr () == SCM_EOL)
557 for (int a = X_AXIS; a < NO_AXES; a++)
558 o[Axis (a)] = g->relative_coordinate (this, Axis (a));
560 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
562 * Staff_symbol_referencer::staff_space (g);
564 /* Must copy the stencil, for we cannot change the stencil
567 st.translate (o + extra);
569 *tail = scm_cons (st.expr (), SCM_EOL);
570 tail = SCM_CDRLOC (*tail);
573 if (Stencil *me = get_stencil ())
574 exprs = scm_cons (me->expr (), exprs);
576 Interval x (extent (this, X_AXIS));
577 Interval y (extent (this, Y_AXIS));
578 Stencil sys_stencil (Box (x, y),
579 scm_cons (ly_symbol2scm ("combine-stencil"),
583 Skyline_pair *skylines = Skyline_pair::unsmob (get_property ("vertical-skylines"));
587 = Lookup::points_to_line_stencil (0.1, (*skylines)[UP].to_points (X_AXIS));
589 = Lookup::points_to_line_stencil (0.1, (*skylines)[DOWN].to_points (X_AXIS));
590 sys_stencil.add_stencil (up.in_color (255, 0, 0));
591 sys_stencil.add_stencil (down.in_color (0, 255, 0));
595 Grob *left_bound = this->get_bound (LEFT);
596 SCM prop_init = left_bound->get_property ("line-break-system-details");
597 Prob *pl = make_paper_system (prop_init);
598 paper_system_set_stencil (pl, sys_stencil);
600 /* information that the page breaker might need */
601 Grob *right_bound = this->get_bound (RIGHT);
602 pl->set_property ("vertical-skylines", this->get_property ("vertical-skylines"));
603 pl->set_property ("page-break-permission", right_bound->get_property ("page-break-permission"));
604 pl->set_property ("page-turn-permission", right_bound->get_property ("page-turn-permission"));
605 pl->set_property ("page-break-penalty", right_bound->get_property ("page-break-penalty"));
606 pl->set_property ("page-turn-penalty", right_bound->get_property ("page-turn-penalty"));
608 if (right_bound->original () == dynamic_cast<System *> (original ())->get_bound (RIGHT))
609 pl->set_property ("last-in-score", SCM_BOOL_T);
611 Interval staff_refpoints;
612 if (Grob *align = get_vertical_alignment ())
614 extract_grob_set (align, "elements", staves);
615 for (vsize i = 0; i < staves.size (); i++)
616 if (staves[i]->is_live ()
617 && Page_layout_problem::is_spaceable (staves[i]))
618 staff_refpoints.add_point (staves[i]->relative_coordinate (this,
622 pl->set_property ("staff-refpoint-extent", ly_interval2scm (staff_refpoints));
623 pl->set_property ("system-grob", this->self_scm ());
625 return pl->unprotect ();
629 System::broken_col_range (Item const *left, Item const *right) const
633 left = left->get_column ();
634 right = right->get_column ();
636 extract_grob_set (this, "columns", cols);
638 vsize i = Paper_column::get_rank (left);
639 int end_rank = Paper_column::get_rank (right);
640 if (i < cols.size ())
643 while (i < cols.size ()
644 && Paper_column::get_rank (cols[i]) < end_rank)
646 Paper_column *c = dynamic_cast<Paper_column *> (cols[i]);
647 if (Paper_column::is_breakable (c) && !c->get_system ())
655 /** Return all columns, but filter out any unused columns , since they might
656 disrupt the spacing problem. */
658 System::used_columns () const
660 extract_grob_set (this, "columns", ro_columns);
662 int last_breakable = ro_columns.size ();
664 while (last_breakable--)
666 if (Paper_column::is_breakable (ro_columns [last_breakable]))
670 vector<Grob *> columns;
671 for (int i = 0; i <= last_breakable; i++)
673 if (Paper_column::is_used (ro_columns[i]))
674 columns.push_back (ro_columns[i]);
681 System::column (vsize which) const
683 extract_grob_set (this, "columns", columns);
684 if (which >= columns.size ())
687 return dynamic_cast<Paper_column *> (columns[which]);
691 System::paper_score () const
697 System::get_rank () const
703 get_root_system (Grob *me)
705 Grob *system_grob = me;
707 while (system_grob->get_parent (Y_AXIS))
708 system_grob = system_grob->get_parent (Y_AXIS);
710 return dynamic_cast<System *> (system_grob);
714 System::get_vertical_alignment ()
716 extract_grob_set (this, "elements", elts);
718 for (vsize i = 0; i < elts.size (); i++)
719 if (Align_interface::has_interface (elts[i]))
722 programming_error ("found multiple vertical alignments in this system");
727 programming_error ("didn't find a vertical alignment in this system");
731 // Finds the furthest staff in the given direction whose x-extent
732 // overlaps with the given interval.
734 System::get_extremal_staff (Direction dir, Interval const &iv)
736 Grob *align = get_vertical_alignment ();
740 extract_grob_set (align, "elements", elts);
741 vsize start = (dir == UP) ? 0 : elts.size () - 1;
742 vsize end = (dir == UP) ? elts.size () : VPOS;
743 for (vsize i = start; i != end; i += dir)
745 if (Hara_kiri_group_spanner::has_interface (elts[i]))
746 Hara_kiri_group_spanner::consider_suicide (elts[i]);
748 Interval intersection = elts[i]->extent (this, X_AXIS);
749 intersection.intersect (iv);
750 if (elts[i]->is_live () && !intersection.is_empty ())
756 // Finds the neighboring staff in the given direction over bounds
758 System::get_neighboring_staff (Direction dir, Grob *vertical_axis_group, Interval_t<int> bounds)
760 Grob *align = get_vertical_alignment ();
764 extract_grob_set (align, "elements", elts);
765 vsize start = (dir == UP) ? 0 : elts.size () - 1;
766 vsize end = (dir == UP) ? elts.size () : VPOS;
770 for (vsize i = start; i != end; i += dir)
772 if (elts[i] == vertical_axis_group)
775 if (Hara_kiri_group_spanner::has_interface (elts[i]))
776 Hara_kiri_group_spanner::consider_suicide (elts[i]);
778 bounds.intersect (elts[i]->spanned_rank_interval ());
779 if (elts[i]->is_live () && !bounds.is_empty ())
786 vector<Simple_spacer>
787 System::get_simple_spacers (Real line_len, Real indent, bool ragged)
789 if (!simple_spacers_.size ())
790 gen_simple_spacers (line_len, indent, ragged);
792 return simple_spacers_;
796 System::gen_simple_spacers (Real line_len, Real indent, bool ragged)
798 vector<vsize> breaks;
799 vector<Grob *> non_loose;
800 vector<Column_description> cols;
801 SCM force_break = ly_symbol2scm ("force");
802 vector<Grob *> columns = used_columns ();
804 for (vsize i = 0; i < columns.size (); i++)
805 if (!Paper_column::is_loose (columns[i])
806 || Paper_column::is_breakable (columns[i]))
807 non_loose.push_back (columns[i]);
810 breaks.push_back (0);
811 cols.push_back (Column_description ());
812 for (vsize i = 1; i + 1 < non_loose.size (); i++)
814 if (Paper_column::is_breakable (non_loose[i]))
815 breaks.push_back (cols.size ());
817 cols.push_back (Column_description::get_column_description (non_loose, i, false));
819 breaks.push_back (cols.size ());
820 simple_spacers_.resize (breaks.size () * breaks.size (), Simple_spacer ());
822 for (vsize b = 0; b + 1 < breaks.size (); b++)
824 cols[breaks[b]] = Column_description::get_column_description (non_loose, breaks[b], true);
825 vsize st = breaks[b];
827 for (vsize c = b + 1; c < breaks.size (); c++)
829 vsize end = breaks[c];
830 Simple_spacer spacer;
832 for (vsize i = breaks[b]; i < end - 1; i++)
833 spacer.add_spring (cols[i].spring_);
834 spacer.add_spring (cols[end - 1].end_spring_);
836 for (vsize i = breaks[b]; i < end; i++)
838 for (vsize r = 0; r < cols[i].rods_.size (); r++)
839 if (cols[i].rods_[r].r_ < end)
840 spacer.add_rod (i - st, cols[i].rods_[r].r_ - st, cols[i].rods_[r].dist_);
841 for (vsize r = 0; r < cols[i].end_rods_.size (); r++)
842 if (cols[i].end_rods_[r].r_ == end)
843 spacer.add_rod (i - st, end - st, cols[i].end_rods_[r].dist_);
844 if (!cols[i].keep_inside_line_.is_empty ())
846 spacer.add_rod (i - st, end - st, cols[i].keep_inside_line_[RIGHT]);
847 spacer.add_rod (0, i - st, -cols[i].keep_inside_line_[LEFT]);
850 spacer.solve ((b == 0) ? line_len - indent : line_len, ragged);
851 spacer.minimal_ = c == b + 1;
852 simple_spacers_[b * breaks.size () + c] = spacer;
855 || (end < cols.size ()
856 && cols[end].break_permission_ == force_break))
863 System::pure_refpoint_extent (vsize start, vsize end)
866 Grob *alignment = get_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);
873 for (vsize i = 0; i < offsets.size (); ++i)
874 if (Page_layout_problem::is_spaceable (staves[i]))
876 ret[UP] = offsets[i];
880 for (vsize i = offsets.size (); i--;)
881 if (Page_layout_problem::is_spaceable (staves[i]))
883 ret[DOWN] = offsets[i];
891 System::part_of_line_pure_height (vsize start, vsize end, bool begin)
893 Grob *alignment = get_vertical_alignment ();
897 extract_grob_set (alignment, "elements", staves);
898 vector<Real> offsets = Align_interface::get_pure_minimum_translations (alignment, staves, Y_AXIS, start, end);
901 for (vsize i = 0; i < staves.size (); ++i)
904 ? Axis_group_interface::begin_of_line_pure_height (staves[i], start)
905 : Axis_group_interface::rest_of_line_pure_height (staves[i], start, end);
906 if (i < offsets.size ())
907 iv.translate (offsets[i]);
911 Interval other_elements = begin
912 ? Axis_group_interface::begin_of_line_pure_height (this, start)
913 : Axis_group_interface::rest_of_line_pure_height (this, start, end);
915 ret.unite (other_elements);
921 System::begin_of_line_pure_height (vsize start, vsize end)
923 return part_of_line_pure_height (start, end, true);
927 System::rest_of_line_pure_height (vsize start, vsize end)
929 return part_of_line_pure_height (start, end, false);
932 // This differs from Axis_group_interface::calc_pure_relevant_grobs
933 // because here, we are only interested in those few elements that aren't
934 // descended from VerticalAlignment (ie. things like RehearsalMark, BarLine).
935 MAKE_SCHEME_CALLBACK (System, calc_pure_relevant_grobs, 1);
937 System::calc_pure_relevant_grobs (SCM smob)
939 Grob *me = unsmob_grob (smob);
941 extract_grob_set (me, "elements", elts);
942 vector<Grob *> relevant_grobs;
943 SCM pure_relevant_p = ly_lily_module_constant ("pure-relevant?");
945 for (vsize i = 0; i < elts.size (); ++i)
947 if (!Axis_group_interface::has_interface (elts[i]))
949 if (to_boolean (scm_apply_1 (pure_relevant_p, elts[i]->self_scm (), SCM_EOL)))
950 relevant_grobs.push_back (elts[i]);
952 if (Item *it = dynamic_cast<Item *> (elts[i]))
957 Item *piece = it->find_prebroken_piece (d);
958 if (piece && to_boolean (scm_apply_1 (pure_relevant_p, piece->self_scm (), SCM_EOL)))
959 relevant_grobs.push_back (piece);
961 while (flip (&d) != LEFT);
966 SCM grobs_scm = Grob_array::make_array ();
968 unsmob_grob_array (grobs_scm)->set_array (relevant_grobs);
972 MAKE_SCHEME_CALLBACK (System, height, 1);
974 System::height (SCM smob)
976 return Axis_group_interface::height (smob);
979 MAKE_SCHEME_CALLBACK (System, calc_pure_height, 3);
981 System::calc_pure_height (SCM smob, SCM start_scm, SCM end_scm)
983 System *me = dynamic_cast<System *> (unsmob_grob (smob));
984 int start = scm_to_int (start_scm);
985 int end = scm_to_int (end_scm);
987 Interval begin = me->begin_of_line_pure_height (start, end);
988 Interval rest = me->rest_of_line_pure_height (start, end);
991 return ly_interval2scm (begin);
995 System::get_pure_bound (Direction d, int start, int end)
997 vector<vsize> ranks = pscore_->get_break_ranks ();
998 vector<vsize> indices = pscore_->get_break_indices ();
999 vector<Grob *> cols = pscore_->get_columns ();
1001 vsize target_rank = (d == LEFT ? start : end);
1002 vector<vsize>::const_iterator i
1003 = lower_bound (ranks.begin (), ranks.end (), target_rank, std::less<vsize> ());
1005 if (i != ranks.end () && (*i) == target_rank)
1006 return cols[indices[i - ranks.begin ()]];
1012 System::get_maybe_pure_bound (Direction d, bool pure, int start, int end)
1014 return pure ? get_pure_bound (d, start, end) : get_bound (d);
1020 NONSPACEABLE_STAVES,
1025 get_maybe_spaceable_staves (SCM smob, int filter)
1027 System *me = dynamic_cast<System *> (unsmob_grob (smob));
1028 Grob *align = me->get_vertical_alignment ();
1034 extract_grob_set (align, "elements", staves);
1036 for (vsize i = 0; i < staves.size (); ++i)
1038 bool spaceable = Page_layout_problem::is_spaceable (staves[i]);
1039 if (staves[i]->is_live ()
1040 && ((filter == ALL_STAVES)
1041 || (filter == SPACEABLE_STAVES && spaceable)
1042 || (filter == NONSPACEABLE_STAVES && !spaceable)))
1044 *tail = scm_cons (staves[i]->self_scm (), SCM_EOL);
1045 tail = SCM_CDRLOC (*tail);
1053 MAKE_SCHEME_CALLBACK (System, get_staves, 1)
1055 System::get_staves (SCM smob)
1057 return get_maybe_spaceable_staves (smob, ALL_STAVES);
1060 MAKE_SCHEME_CALLBACK (System, get_spaceable_staves, 1)
1062 System::get_spaceable_staves (SCM smob)
1064 return get_maybe_spaceable_staves (smob, SPACEABLE_STAVES);
1067 MAKE_SCHEME_CALLBACK (System, get_nonspaceable_staves, 1)
1069 System::get_nonspaceable_staves (SCM smob)
1071 return get_maybe_spaceable_staves (smob, NONSPACEABLE_STAVES);
1074 ADD_INTERFACE (System,
1075 "This is the top-level object: Each object in a score"
1076 " ultimately has a @code{System} object as its X and"
1083 "footnotes-before-line-breaking "
1084 "footnotes-after-line-breaking "
1085 "in-note-direction "
1090 "skyline-horizontal-padding "