2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2012 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/>.
20 #include "axis-group-interface.hh"
24 #include "align-interface.hh"
25 #include "directional-element-interface.hh"
26 #include "grob-array.hh"
27 #include "hara-kiri-group-spanner.hh"
28 #include "international.hh"
29 #include "interval-set.hh"
31 #include "paper-column.hh"
32 #include "paper-score.hh"
33 #include "pointer-group-interface.hh"
34 #include "separation-item.hh"
35 #include "skyline-pair.hh"
36 #include "staff-grouper-interface.hh"
41 #include "unpure-pure-container.hh"
44 pure_staff_priority_less (Grob *const &g1, Grob *const &g2);
46 Real Axis_group_interface::default_outside_staff_padding_ = 0.46;
49 Axis_group_interface::get_default_outside_staff_padding ()
51 return default_outside_staff_padding_;
54 MAKE_SCHEME_CALLBACK (Axis_group_interface, cross_staff, 1);
56 Axis_group_interface::cross_staff (SCM smob)
58 Grob *me = unsmob_grob (smob);
59 extract_grob_set (me, "elements", elts);
60 for (vsize i = 0; i < elts.size (); i++)
61 if (to_boolean (elts[i]->get_property ("cross-staff")))
68 Axis_group_interface::add_element (Grob *me, Grob *e)
70 SCM axes = me->get_property ("axes");
71 if (!scm_is_pair (axes))
72 programming_error ("axes should be nonempty");
74 for (SCM ax = axes; scm_is_pair (ax); ax = scm_cdr (ax))
76 Axis a = (Axis) scm_to_int (scm_car (ax));
78 if (!e->get_parent (a))
79 e->set_parent (me, a);
81 e->set_object ((a == X_AXIS)
82 ? ly_symbol2scm ("axis-group-parent-X")
83 : ly_symbol2scm ("axis-group-parent-Y"),
87 /* must be ordered, because Align_interface also uses
88 Axis_group_interface */
89 Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), e);
93 Axis_group_interface::has_axis (Grob *me, Axis a)
95 SCM axes = me->get_property ("axes");
97 return (SCM_BOOL_F != scm_memq (scm_from_int (a), axes));
101 Axis_group_interface::relative_group_extent (vector<Grob *> const &elts,
102 Grob *common, Axis a)
104 return relative_maybe_bound_group_extent (elts, common, a, false);
108 Axis_group_interface::relative_maybe_bound_group_extent (vector<Grob *> const &elts,
109 Grob *common, Axis a, bool bound)
112 for (vsize i = 0; i < elts.size (); i++)
115 if (has_interface (se)
116 || !to_boolean (se->get_property ("cross-staff")))
118 Interval dims = (bound && has_interface (se)
119 ? generic_bound_extent (se, common, a)
120 : se->extent (common, a));
121 if (!dims.is_empty ())
129 Axis_group_interface::generic_bound_extent (Grob *me, Grob *common, Axis a)
131 /* trigger the callback to do skyline-spacing on the children */
133 (void) me->get_property ("vertical-skylines");
135 extract_grob_set (me, "elements", elts);
136 vector<Grob *> new_elts;
138 SCM interfaces = me->get_property ("bound-alignment-interfaces");
140 for (vsize i = 0; i < elts.size (); i++)
141 for (SCM l = interfaces; scm_is_pair (l); l = scm_cdr (l))
142 if (elts[i]->internal_has_interface (scm_car (l)))
143 new_elts.push_back (elts[i]);
145 if (!new_elts.size ())
146 return robust_relative_extent (me, common, a);
149 common = common_refpoint_of_array (new_elts, me, a);
151 return relative_maybe_bound_group_extent (new_elts, common, a, true);
155 Axis_group_interface::sum_partial_pure_heights (Grob *me, int start, int end)
157 Interval iv = begin_of_line_pure_height (me, start);
158 iv.unite (rest_of_line_pure_height (me, start, end));
164 Axis_group_interface::part_of_line_pure_height (Grob *me, bool begin, int start, int end)
166 Spanner *sp = dynamic_cast<Spanner *> (me);
167 SCM cache_symbol = begin
168 ? ly_symbol2scm ("begin-of-line-pure-height")
169 : ly_symbol2scm ("rest-of-line-pure-height");
170 SCM cached = sp->get_cached_pure_property (cache_symbol, start, end);
171 if (scm_is_pair (cached))
172 return robust_scm2interval (cached, Interval (0, 0));
174 SCM adjacent_pure_heights = me->get_property ("adjacent-pure-heights");
177 if (!scm_is_pair (adjacent_pure_heights))
178 ret = Interval (0, 0);
181 SCM these_pure_heights = begin
182 ? scm_car (adjacent_pure_heights)
183 : scm_cdr (adjacent_pure_heights);
185 if (scm_is_vector (these_pure_heights))
186 ret = combine_pure_heights (me, these_pure_heights, start, end);
188 ret = Interval (0, 0);
191 sp->cache_pure_property (cache_symbol, start, end, ly_interval2scm (ret));
196 Axis_group_interface::begin_of_line_pure_height (Grob *me, int start)
198 return part_of_line_pure_height (me, true, start, start + 1);
202 Axis_group_interface::rest_of_line_pure_height (Grob *me, int start, int end)
204 return part_of_line_pure_height (me, false, start, end);
208 Axis_group_interface::combine_pure_heights (Grob *me, SCM measure_extents, int start, int end)
210 Paper_score *ps = get_root_system (me)->paper_score ();
211 vector<vsize> breaks = ps->get_break_indices ();
212 vector<Grob *> cols = ps->get_columns ();
215 for (vsize i = 0; i + 1 < breaks.size (); i++)
217 int r = Paper_column::get_rank (cols[breaks[i]]);
222 ext.unite (ly_scm2interval (scm_c_vector_ref (measure_extents, i)));
228 // adjacent-pure-heights is a pair of vectors, each of which has one element
229 // for every measure in the score. The first vector stores, for each measure,
230 // the combined height of the elements that are present only when the bar
231 // is at the beginning of a line. The second vector stores, for each measure,
232 // the combined height of the elements that are present only when the bar
233 // is not at the beginning of a line.
234 MAKE_SCHEME_CALLBACK (Axis_group_interface, adjacent_pure_heights, 1)
236 Axis_group_interface::adjacent_pure_heights (SCM smob)
238 Grob *me = unsmob_grob (smob);
240 Grob *common = unsmob_grob (me->get_object ("pure-Y-common"));
241 extract_grob_set (me, "pure-relevant-grobs", elts);
243 Paper_score *ps = get_root_system (me)->paper_score ();
244 vector<vsize> ranks = ps->get_break_ranks ();
246 vector<Interval> begin_line_heights;
247 vector<Interval> mid_line_heights;
248 vector<Interval> begin_line_staff_heights;
249 vector<Interval> mid_line_staff_heights;
250 begin_line_heights.resize (ranks.size () - 1);
251 mid_line_heights.resize (ranks.size () - 1);
253 for (vsize i = 0; i < elts.size (); ++i)
257 if (to_boolean (g->get_property ("cross-staff"))
258 && !has_interface (g))
264 bool outside_staff = scm_is_number (g->get_property ("outside-staff-priority"));
265 Real padding = robust_scm2double (g->get_property ("outside-staff-padding"), get_default_outside_staff_padding ());
267 // When we encounter the first outside-staff grob, make a copy
268 // of the current heights to use as an estimate for the staff heights.
269 // Note that the outside-staff approximation that we use here doesn't
270 // consider any collisions that might occur between outside-staff grobs,
271 // but only the fact that outside-staff grobs may need to be raised above
273 if (outside_staff && begin_line_staff_heights.empty ())
275 begin_line_staff_heights = begin_line_heights;
276 mid_line_staff_heights = mid_line_heights;
279 // TODO: consider a pure version of get_grob_direction?
280 Direction d = to_dir (g->get_property_data ("direction"));
281 d = (d == CENTER) ? UP : d;
283 Interval_t<int> rank_span = g->spanned_rank_interval ();
284 vsize first_break = lower_bound (ranks, (vsize)rank_span[LEFT], less<vsize> ());
285 if (first_break > 0 && ranks[first_break] >= (vsize)rank_span[LEFT])
288 for (vsize j = first_break; j + 1 < ranks.size () && (int)ranks[j] <= rank_span[RIGHT]; ++j)
290 int start = ranks[j];
291 int end = ranks[j + 1];
293 // Take grobs that are visible with respect to a slightly longer line.
294 // Otherwise, we will never include grobs at breakpoints which aren't
295 // end-of-line-visible.
296 int visibility_end = j + 2 < ranks.size () ? ranks[j + 2] : end;
298 if (g->pure_is_visible (start, visibility_end))
300 Interval dims = g->pure_height (common, start, end);
301 if (!dims.is_empty ())
303 if (rank_span[LEFT] <= start)
306 begin_line_heights[j].unite (begin_line_staff_heights[j].union_disjoint (dims, padding, d));
308 begin_line_heights[j].unite (dims);
310 if (rank_span[RIGHT] > start)
313 mid_line_heights[j].unite (mid_line_staff_heights[j].union_disjoint (dims, padding, d));
315 mid_line_heights[j].unite (dims);
322 // Convert begin_line_heights and min_line_heights to SCM.
323 SCM begin_scm = scm_c_make_vector (ranks.size () - 1, SCM_EOL);
324 SCM mid_scm = scm_c_make_vector (ranks.size () - 1, SCM_EOL);
325 for (vsize i = 0; i < begin_line_heights.size (); ++i)
327 scm_vector_set_x (begin_scm, scm_from_int (i), ly_interval2scm (begin_line_heights[i]));
328 scm_vector_set_x (mid_scm, scm_from_int (i), ly_interval2scm (mid_line_heights[i]));
331 return scm_cons (begin_scm, mid_scm);
335 Axis_group_interface::relative_pure_height (Grob *me, int start, int end)
337 /* It saves a _lot_ of time if we assume a VerticalAxisGroup is additive
338 (ie. height (i, k) = max (height (i, j) height (j, k)) for all i <= j <= k).
339 Unfortunately, it isn't always true, particularly if there is a
340 VerticalAlignment somewhere in the descendants.
342 Usually, the only VerticalAlignment comes from Score. This makes it
343 reasonably safe to assume that if our parent is a VerticalAlignment,
344 we can assume additivity and cache things nicely. */
345 Grob *p = me->get_parent (Y_AXIS);
346 if (p && Align_interface::has_interface (p))
347 return Axis_group_interface::sum_partial_pure_heights (me, start, end);
349 Grob *common = unsmob_grob (me->get_object ("pure-Y-common"));
350 extract_grob_set (me, "pure-relevant-grobs", elts);
353 for (vsize i = 0; i < elts.size (); i++)
356 Interval_t<int> rank_span = g->spanned_rank_interval ();
357 if (rank_span[LEFT] <= end && rank_span[RIGHT] >= start
358 && g->pure_is_visible (start, end)
359 && !(to_boolean (g->get_property ("cross-staff"))
360 && Stem::has_interface (g)))
362 Interval dims = g->pure_height (common, start, end);
363 if (!dims.is_empty ())
370 MAKE_SCHEME_CALLBACK (Axis_group_interface, width, 1);
372 Axis_group_interface::width (SCM smob)
374 Grob *me = unsmob_grob (smob);
375 return generic_group_extent (me, X_AXIS);
378 MAKE_SCHEME_CALLBACK (Axis_group_interface, height, 1);
380 Axis_group_interface::height (SCM smob)
382 Grob *me = unsmob_grob (smob);
383 return generic_group_extent (me, Y_AXIS);
386 MAKE_SCHEME_CALLBACK (Axis_group_interface, pure_height, 3);
388 Axis_group_interface::pure_height (SCM smob, SCM start_scm, SCM end_scm)
390 int start = robust_scm2int (start_scm, 0);
391 int end = robust_scm2int (end_scm, INT_MAX);
392 Grob *me = unsmob_grob (smob);
394 /* Maybe we are in the second pass of a two-pass spacing run. In that
395 case, the Y-extent of a system is already given to us */
396 System *system = dynamic_cast<System *> (me);
399 SCM line_break_details = system->column (start)->get_property ("line-break-system-details");
400 SCM system_y_extent = scm_assq (ly_symbol2scm ("system-Y-extent"), line_break_details);
401 if (scm_is_pair (system_y_extent))
402 return scm_cdr (system_y_extent);
405 return ly_interval2scm (pure_group_height (me, start, end));
408 MAKE_SCHEME_CALLBACK (Axis_group_interface, calc_skylines, 1);
410 Axis_group_interface::calc_skylines (SCM smob)
412 Grob *me = unsmob_grob (smob);
413 Skyline_pair skylines = skyline_spacing (me);
414 return skylines.smobbed_copy ();
417 /* whereas calc_skylines calculates skylines for axis-groups with a lot of
418 visible children, combine_skylines is designed for axis-groups whose only
419 children are other axis-groups (ie. VerticalAlignment). Rather than
420 calculating all the skylines from scratch, we just merge the skylines
423 MAKE_SCHEME_CALLBACK (Axis_group_interface, combine_skylines, 1);
425 Axis_group_interface::combine_skylines (SCM smob)
427 Grob *me = unsmob_grob (smob);
428 extract_grob_set (me, "elements", elements);
429 Grob *y_common = common_refpoint_of_array (elements, me, Y_AXIS);
430 Grob *x_common = common_refpoint_of_array (elements, me, X_AXIS);
433 programming_error ("combining skylines that don't belong to me");
436 for (vsize i = 0; i < elements.size (); i++)
438 SCM skyline_scm = elements[i]->get_property ("vertical-skylines");
439 if (Skyline_pair::unsmob (skyline_scm))
441 Real offset = elements[i]->relative_coordinate (y_common, Y_AXIS);
442 Skyline_pair other = *Skyline_pair::unsmob (skyline_scm);
443 other.raise (offset);
444 other.shift (elements[i]->relative_coordinate (x_common, X_AXIS));
448 return ret.smobbed_copy ();
452 Axis_group_interface::generic_group_extent (Grob *me, Axis a)
454 extract_grob_set (me, "elements", elts);
456 /* trigger the callback to do skyline-spacing on the children */
458 for (vsize i = 0; i < elts.size (); i++)
459 (void) elts[i]->get_property ("vertical-skylines");
461 Grob *common = common_refpoint_of_array (elts, me, a);
463 Real my_coord = me->relative_coordinate (common, a);
464 Interval r (relative_group_extent (elts, common, a));
466 return ly_interval2scm (r - my_coord);
469 /* This is like generic_group_extent, but it only counts the grobs that
470 are children of some other axis-group. This is uncached; if it becomes
471 commonly used, it may be necessary to cache it somehow. */
473 Axis_group_interface::staff_extent (Grob *me, Grob *refp, Axis ext_a, Grob *staff, Axis parent_a)
475 extract_grob_set (me, "elements", elts);
476 vector<Grob *> new_elts;
478 for (vsize i = 0; i < elts.size (); i++)
479 if (elts[i]->common_refpoint (staff, parent_a) == staff)
480 new_elts.push_back (elts[i]);
482 return relative_group_extent (new_elts, refp, ext_a);
485 MAKE_SCHEME_CALLBACK (Axis_group_interface, calc_pure_relevant_grobs, 1);
487 Axis_group_interface::calc_pure_relevant_grobs (SCM smob)
489 Grob *me = unsmob_grob (smob);
490 return internal_calc_pure_relevant_grobs (me, "elements");
494 Axis_group_interface::internal_calc_pure_relevant_grobs (Grob *me, string grob_set_name)
496 extract_grob_set (me, grob_set_name.c_str (), elts);
498 vector<Grob *> relevant_grobs;
500 for (vsize i = 0; i < elts.size (); i++)
502 if (elts[i] && elts[i]->is_live ())
504 relevant_grobs.push_back (elts[i]);
505 if (Item *it = dynamic_cast<Item *> (elts[i]))
507 for (LEFT_and_RIGHT (d))
509 Item *piece = it->find_prebroken_piece (d);
510 if (piece && piece->is_live ())
511 relevant_grobs.push_back (piece);
517 vector_sort (relevant_grobs, pure_staff_priority_less);
518 SCM grobs_scm = Grob_array::make_array ();
519 unsmob_grob_array (grobs_scm)->set_array (relevant_grobs);
524 MAKE_SCHEME_CALLBACK (Axis_group_interface, calc_pure_y_common, 1);
526 Axis_group_interface::calc_pure_y_common (SCM smob)
528 Grob *me = unsmob_grob (smob);
530 extract_grob_set (me, "pure-relevant-grobs", elts);
531 Grob *common = common_refpoint_of_array (elts, me, Y_AXIS);
534 me->programming_error ("No common parent found in calc_pure_y_common.");
538 return common->self_scm ();
542 Axis_group_interface::calc_common (Grob *me, Axis axis)
544 extract_grob_set (me, "elements", elts);
545 Grob *common = common_refpoint_of_array (elts, me, axis);
548 me->programming_error ("No common parent found in calc_common axis.");
552 return common->self_scm ();
555 MAKE_SCHEME_CALLBACK (Axis_group_interface, calc_x_common, 1);
557 Axis_group_interface::calc_x_common (SCM grob)
559 return calc_common (unsmob_grob (grob), X_AXIS);
562 MAKE_SCHEME_CALLBACK (Axis_group_interface, calc_y_common, 1);
564 Axis_group_interface::calc_y_common (SCM grob)
566 return calc_common (unsmob_grob (grob), Y_AXIS);
570 Axis_group_interface::pure_group_height (Grob *me, int start, int end)
572 Grob *common = unsmob_grob (me->get_object ("pure-Y-common"));
576 programming_error ("no pure Y common refpoint");
579 Real my_coord = me->pure_relative_y_coordinate (common, start, end);
580 Interval r (relative_pure_height (me, start, end));
586 Axis_group_interface::get_children (Grob *me, vector<Grob *> *found)
588 found->push_back (me);
590 if (!has_interface (me))
593 extract_grob_set (me, "elements", elements);
594 for (vsize i = 0; i < elements.size (); i++)
596 Grob *e = elements[i];
597 Axis_group_interface::get_children (e, found);
602 staff_priority_less (Grob *const &g1, Grob *const &g2)
604 Real priority_1 = robust_scm2double (g1->get_property ("outside-staff-priority"), -infinity_f);
605 Real priority_2 = robust_scm2double (g2->get_property ("outside-staff-priority"), -infinity_f);
607 if (priority_1 < priority_2)
609 else if (priority_1 > priority_2)
612 /* if neither grob has an outside-staff priority, the ordering will have no
613 effect -- we just need to choose a consistent ordering. We do this to
614 avoid the side-effect of calculating extents. */
615 if (isinf (priority_1))
618 /* if there is no preference in staff priority, choose the left-most one */
619 Grob *common = g1->common_refpoint (g2, X_AXIS);
620 Real start_1 = g1->extent (common, X_AXIS)[LEFT];
621 Real start_2 = g2->extent (common, X_AXIS)[LEFT];
622 return start_1 < start_2;
626 pure_staff_priority_less (Grob *const &g1, Grob *const &g2)
628 Real priority_1 = robust_scm2double (g1->get_property ("outside-staff-priority"), -infinity_f);
629 Real priority_2 = robust_scm2double (g2->get_property ("outside-staff-priority"), -infinity_f);
631 return priority_1 < priority_2;
635 add_interior_skylines (Grob *me, Grob *x_common, Grob *y_common, vector<Skyline_pair> *skylines)
637 if (Grob_array *elements = unsmob_grob_array (me->get_object ("elements")))
639 for (vsize i = 0; i < elements->size (); i++)
640 add_interior_skylines (elements->grob (i), x_common, y_common, skylines);
642 else if (!scm_is_number (me->get_property ("outside-staff-priority"))
643 && !to_boolean (me->get_property ("cross-staff")))
645 Skyline_pair *maybe_pair = Skyline_pair::unsmob (me->get_property ("vertical-skylines"));
648 if (maybe_pair->is_empty ())
650 skylines->push_back (Skyline_pair (*maybe_pair));
651 skylines->back ().shift (me->relative_coordinate (x_common, X_AXIS));
652 skylines->back ().raise (me->relative_coordinate (y_common, Y_AXIS));
656 // Raises the grob elt (whose skylines are given by h_skyline
657 // and v_skyline) so that it doesn't intersect with staff_skyline,
658 // or with anything in other_h_skylines and other_v_skylines.
660 avoid_outside_staff_collisions (Grob *elt,
661 Skyline_pair *v_skyline,
663 Real horizon_padding,
664 vector<Skyline_pair> const &other_v_skylines,
665 vector<Real> const &other_padding,
666 vector<Real> const &other_horizon_padding,
669 assert (other_v_skylines.size () == other_padding.size ());
670 assert (other_v_skylines.size () == other_horizon_padding.size ());
671 vector<Interval> forbidden_intervals;
672 for (vsize j = 0; j < other_v_skylines.size (); j++)
674 Skyline_pair const &v_other = other_v_skylines[j];
675 Real horizon_pad = (horizon_padding + other_horizon_padding[j]);
678 // We need to push elt by at least this much to be outside v_other.
679 collision[dir] = ((*v_skyline)[-dir].distance (v_other[dir], horizon_pad)
681 // We need to pull elt by at least this much to be inside v_other.
682 collision[-dir] = ((*v_skyline)[dir].distance (v_other[-dir], horizon_pad)
683 + other_padding[j]) * -dir;
685 forbidden_intervals.push_back (collision);
688 Interval_set allowed_shifts
689 = Interval_set::interval_union (forbidden_intervals).complement ();
690 Real move = allowed_shifts.nearest_point (0, dir);
691 v_skyline->raise (move);
692 elt->translate_axis (move, Y_AXIS);
696 valid_outside_staff_placement_directive (Grob *me)
698 SCM directive = me->get_property ("outside-staff-placement-directive");
700 if ((directive == ly_symbol2scm ("left-to-right-greedy"))
701 || (directive == ly_symbol2scm ("left-to-right-polite"))
702 || (directive == ly_symbol2scm ("right-to-left-greedy"))
703 || (directive == ly_symbol2scm ("right-to-left-polite")))
706 me->warning (_f ("\"%s\" is not a valid outside-staff-placement-directive",
707 robust_symbol2string (directive, "").c_str ()));
709 return ly_symbol2scm ("left-to-right-polite");
712 // Shifts the grobs in elements to ensure that they (and any
713 // connected riders) don't collide with the staff skylines
714 // or anything in all_X_skylines. Afterwards, the skylines
715 // of the grobs in elements will be added to all_v_skylines.
717 add_grobs_of_one_priority (Grob *me,
718 Drul_array<vector<Skyline_pair> > *all_v_skylines,
719 Drul_array<vector<Real> > *all_paddings,
720 Drul_array<vector<Real> > *all_horizon_paddings,
721 vector<Grob *> elements,
724 multimap<Grob *, Grob *> const &riders)
728 = valid_outside_staff_placement_directive (me);
730 bool l2r = ((directive == ly_symbol2scm ("left-to-right-greedy"))
731 || (directive == ly_symbol2scm ("left-to-right-polite")));
733 bool polite = ((directive == ly_symbol2scm ("left-to-right-polite"))
734 || (directive == ly_symbol2scm ("right-to-left-polite")));
737 vector<Skyline_pair> skylines_to_merge;
739 // We want to avoid situations like this:
743 // -------------------
745 // -------------------
747 // The point is that "still more text" should be positioned under
748 // "more text". In order to achieve this, we place the grobs in several
749 // passes. We keep track of the right-most horizontal position that has been
750 // affected by the current pass so far (actually we keep track of 2
751 // positions, one for above the staff, one for below).
753 // In each pass, we loop through the unplaced grobs from left to right.
754 // If the grob doesn't overlap the right-most affected position, we place it
755 // (and then update the right-most affected position to point to the right
756 // edge of the just-placed grob). Otherwise, we skip it until the next pass.
757 while (!elements.empty ())
759 Drul_array<Real> last_end (-infinity_f, -infinity_f);
760 vector<Grob *> skipped_elements;
761 for (vsize i = l2r ? 0 : elements.size ();
762 l2r ? i < elements.size () : i--;
765 Grob *elt = elements[i];
767 = robust_scm2double (elt->get_property ("outside-staff-padding"),
768 Axis_group_interface::get_default_outside_staff_padding ());
770 = robust_scm2double (elt->get_property ("outside-staff-horizontal-padding"), 0.0);
771 Interval x_extent = elt->extent (x_common, X_AXIS);
772 x_extent.widen (horizon_padding);
774 Direction dir = get_grob_direction (elt);
777 warning (_ ("an outside-staff object should have a direction, defaulting to up"));
781 if (x_extent[LEFT] <= last_end[dir] && polite)
783 skipped_elements.push_back (elt);
786 last_end[dir] = x_extent[RIGHT];
788 Skyline_pair *v_orig = Skyline_pair::unsmob (elt->get_property ("vertical-skylines"));
789 if (v_orig->is_empty ())
792 // Find the riders associated with this grob, and merge their
793 // skylines with elt's skyline.
794 typedef multimap<Grob *, Grob *>::const_iterator GrobMapIterator;
795 pair<GrobMapIterator, GrobMapIterator> range = riders.equal_range (elt);
796 vector<Skyline_pair> rider_v_skylines;
797 for (GrobMapIterator j = range.first; j != range.second; j++)
799 Grob *rider = j->second;
800 Skyline_pair *v_rider = Skyline_pair::unsmob (rider->get_property ("vertical-skylines"));
803 Skyline_pair copy (*v_rider);
804 copy.shift (rider->relative_coordinate (x_common, X_AXIS));
805 copy.raise (rider->relative_coordinate (y_common, Y_AXIS));
806 rider_v_skylines.push_back (copy);
809 Skyline_pair v_skylines (*v_orig);
810 v_skylines.shift (elt->relative_coordinate (x_common, X_AXIS));
811 v_skylines.raise (elt->relative_coordinate (y_common, Y_AXIS));
812 v_skylines.merge (Skyline_pair (rider_v_skylines));
814 avoid_outside_staff_collisions (elt,
818 (*all_v_skylines)[dir],
819 (*all_paddings)[dir],
820 (*all_horizon_paddings)[dir],
823 elt->set_property ("outside-staff-priority", SCM_BOOL_F);
824 (*all_v_skylines)[dir].push_back (v_skylines);
825 (*all_paddings)[dir].push_back (padding);
826 (*all_horizon_paddings)[dir].push_back (horizon_padding);
828 swap (elements, skipped_elements);
829 skipped_elements.clear ();
833 // If the Grob has a Y-ancestor with outside-staff-priority, return it.
834 // Otherwise, return 0.
836 Axis_group_interface::outside_staff_ancestor (Grob *me)
838 Grob *parent = me->get_parent (Y_AXIS);
842 if (scm_is_number (parent->get_property ("outside-staff-priority")))
845 return outside_staff_ancestor (parent);
848 // It is tricky to correctly handle skyline placement of cross-staff grobs.
849 // For example, cross-staff beams cannot be formatted until the distance between
850 // staves is known and therefore any grobs that depend on the beam cannot be placed
851 // until the skylines are known. On the other hand, the distance between staves should
852 // really depend on position of the cross-staff grobs that lie between them.
853 // Currently, we just leave cross-staff grobs out of the
854 // skyline altogether, but this could mean that staves are placed so close together
855 // that there is no room for the cross-staff grob. It also means, of course, that
856 // we don't get the benefits of skyline placement for cross-staff grobs.
858 Axis_group_interface::skyline_spacing (Grob *me)
860 extract_grob_set (me, Grob_array::unsmob (me->get_object ("vertical-skyline-elements")) ? "vertical-skyline-elements" : "elements", fakeelements);
861 vector<Grob *> elements (fakeelements);
862 for (vsize i = 0; i < elements.size (); i++)
864 As a sanity check, we make sure that no grob with an outside staff priority
865 has a Y-parent that also has an outside staff priority, which would result
868 if (scm_is_number (elements[i]->get_property ("outside-staff-priority"))
869 && outside_staff_ancestor (elements[i]))
871 elements[i]->warning ("Cannot set outside-staff-priority for element and elements' Y parent.");
872 elements[i]->set_property ("outside-staff-priority", SCM_BOOL_F);
875 /* For grobs with an outside-staff-priority, the sorting function might
876 call extent and cause suicide. This breaks the contract that is required
877 for the STL sort function. To avoid this, we make sure that any suicides
878 are triggered beforehand.
880 for (vsize i = 0; i < elements.size (); i++)
881 if (scm_is_number (elements[i]->get_property ("outside-staff-priority")))
882 elements[i]->extent (elements[i], X_AXIS);
884 vector_sort (elements, staff_priority_less);
885 Grob *x_common = common_refpoint_of_array (elements, me, X_AXIS);
886 Grob *y_common = common_refpoint_of_array (elements, me, Y_AXIS);
888 assert (y_common == me);
890 // A rider is a grob that is not outside-staff, but has an outside-staff
891 // ancestor. In that case, the rider gets moved along with its ancestor.
892 multimap<Grob *, Grob *> riders;
895 vector<Skyline_pair> inside_staff_skylines;
897 for (i = 0; i < elements.size ()
898 && !scm_is_number (elements[i]->get_property ("outside-staff-priority")); i++)
900 Grob *elt = elements[i];
901 Grob *ancestor = outside_staff_ancestor (elt);
903 add_interior_skylines (elt, x_common, y_common, &inside_staff_skylines);
905 riders.insert (pair<Grob *, Grob *> (ancestor, elt));
908 Skyline_pair skylines (inside_staff_skylines);
910 // These are the skylines of all outside-staff grobs
911 // that have already been processed. We keep them around in order to
912 // check them for collisions with the currently active outside-staff grob.
913 Drul_array<vector<Skyline_pair> > all_v_skylines;
914 Drul_array<vector<Real> > all_paddings;
915 Drul_array<vector<Real> > all_horizon_paddings;
916 for (UP_and_DOWN (d))
918 all_v_skylines[d].push_back (skylines);
919 all_paddings[d].push_back (0);
920 all_horizon_paddings[d].push_back (0);
923 for (; i < elements.size (); i++)
925 if (to_boolean (elements[i]->get_property ("cross-staff")))
928 // Collect all the outside-staff grobs that have a particular priority.
929 SCM priority = elements[i]->get_property ("outside-staff-priority");
930 vector<Grob *> current_elts;
931 current_elts.push_back (elements[i]);
932 while (i + 1 < elements.size ()
933 && scm_is_eq (elements[i + 1]->get_property ("outside-staff-priority"), priority))
935 if (!to_boolean (elements[i + 1]->get_property ("cross-staff")))
936 current_elts.push_back (elements[i + 1]);
940 add_grobs_of_one_priority (me,
943 &all_horizon_paddings,
950 // Now everything in all_v_skylines has been shifted appropriately; merge
951 // them all into skylines to get the complete outline.
952 Skyline_pair other_skylines (all_v_skylines[UP]);
953 other_skylines.merge (Skyline_pair (all_v_skylines[DOWN]));
954 skylines.merge (other_skylines);
956 // We began by shifting my skyline to be relative to the common refpoint; now
958 skylines.shift (-me->relative_coordinate (x_common, X_AXIS));
963 MAKE_SCHEME_CALLBACK (Axis_group_interface, print, 1)
965 Axis_group_interface::print (SCM smob)
970 Grob *me = unsmob_grob (smob);
972 if (Skyline_pair *s = Skyline_pair::unsmob (me->get_property ("vertical-skylines")))
974 ret.add_stencil (Lookup::points_to_line_stencil (0.1, (*s)[UP].to_points (X_AXIS))
975 .in_color (255, 0, 255));
976 ret.add_stencil (Lookup::points_to_line_stencil (0.1, (*s)[DOWN].to_points (X_AXIS))
977 .in_color (0, 255, 255));
979 return ret.smobbed_copy ();
982 MAKE_SCHEME_CALLBACK (Axis_group_interface, calc_pure_staff_staff_spacing, 3)
984 Axis_group_interface::calc_pure_staff_staff_spacing (SCM smob, SCM start, SCM end)
986 return calc_maybe_pure_staff_staff_spacing (unsmob_grob (smob),
992 MAKE_SCHEME_CALLBACK (Axis_group_interface, calc_staff_staff_spacing, 1)
994 Axis_group_interface::calc_staff_staff_spacing (SCM smob)
996 return calc_maybe_pure_staff_staff_spacing (unsmob_grob (smob),
1003 Axis_group_interface::calc_maybe_pure_staff_staff_spacing (Grob *me, bool pure, int start, int end)
1005 Grob *grouper = unsmob_grob (me->get_object ("staff-grouper"));
1009 bool within_group = Staff_grouper_interface::maybe_pure_within_group (grouper, me, pure, start, end);
1011 return grouper->get_maybe_pure_property ("staff-staff-spacing", pure, start, end);
1013 return grouper->get_maybe_pure_property ("staffgroup-staff-spacing", pure, start, end);
1015 return me->get_maybe_pure_property ("default-staff-staff-spacing", pure, start, end);
1018 ADD_INTERFACE (Axis_group_interface,
1019 "An object that groups other layout objects.",
1021 // TODO: some of these properties are specific to
1022 // VerticalAxisGroup. We should split off a
1023 // vertical-axis-group-interface.
1025 "adjacent-pure-heights "
1027 "bound-alignment-interfaces "
1028 "default-staff-staff-spacing "
1032 "nonstaff-nonstaff-spacing "
1033 "nonstaff-relatedstaff-spacing "
1034 "nonstaff-unrelatedstaff-spacing "
1035 "outside-staff-placement-directive "
1036 "pure-relevant-grobs "
1037 "pure-relevant-items "
1038 "pure-relevant-spanners "
1042 "staff-staff-spacing "
1044 "vertical-skyline-elements "