2 tuplet-bracket.cc -- implement Tuplet_bracket
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2007 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@xs4all.nl>
13 - tuplet bracket should probably be subject to the same rules as
14 beam sloping/quanting.
16 - There is no support for kneed brackets, or nested brackets.
18 - number placement for parallel beams should be much more advanced:
19 for sloped beams some extra horizontal offset must be introduced.
21 - number placement is usually done over the center note, not the
26 TODO: quantise, we don't want to collide with staff lines.
27 (or should we be above staff?)
29 todo: handle breaking elegantly.
33 #include "tuplet-bracket.hh"
34 #include "line-interface.hh"
37 #include "output-def.hh"
38 #include "font-interface.hh"
39 #include "text-interface.hh"
41 #include "note-column.hh"
42 #include "pointer-group-interface.hh"
43 #include "directional-element-interface.hh"
45 #include "staff-symbol-referencer.hh"
47 #include "paper-column.hh"
51 get_x_bound_item (Grob *me_grob, Direction hdir, Direction my_dir)
53 Spanner *me = dynamic_cast<Spanner *> (me_grob);
54 Item *g = me->get_bound (hdir);
55 if (Note_column::has_interface (g)
56 && Note_column::get_stem (g)
57 && Note_column::dir (g) == my_dir)
58 g = Note_column::get_stem (g);
65 flatten_number_pair_property (Grob *me,
66 Direction xdir, SCM sym)
68 Drul_array<Real> zero (0, 0);
70 = robust_scm2drul (me->internal_get_property (sym), zero);
73 me->set_property (sym, ly_interval2scm (pair));
78 Return beam that encompasses the span of the tuplet bracket.
82 Tuplet_bracket::parallel_beam (Grob *me_grob, vector<Grob*> const &cols,
85 Spanner *me = dynamic_cast<Spanner *> (me_grob);
87 if (me->get_bound (LEFT)->break_status_dir ()
88 || me->get_bound (RIGHT)->break_status_dir ())
91 Drul_array<Grob*> stems (Note_column::get_stem (cols[0]),
92 Note_column::get_stem (cols.back ()));
94 if (dynamic_cast<Item*> (stems[RIGHT])->get_column ()
95 != me->get_bound (RIGHT)->get_column())
98 Drul_array<Grob*> beams;
101 beams[d] = stems[d] ? Stem::get_beam (stems[d]) : 0;
102 } while (flip (&d) != LEFT);
104 *equally_long = false;
105 if (! (beams[LEFT] && (beams[LEFT] == beams[RIGHT]) && !me->is_broken ()))
108 extract_grob_set (beams[LEFT], "stems", beam_stems);
109 if (beam_stems.size () == 0)
111 programming_error ("beam under tuplet bracket has no stems");
117 (beam_stems[0] == stems[LEFT]
118 && beam_stems.back () == stems[RIGHT]);
123 MAKE_SCHEME_CALLBACK(Tuplet_bracket,calc_connect_to_neighbors,1);
125 Tuplet_bracket::calc_connect_to_neighbors (SCM smob)
127 Spanner *me = unsmob_spanner (smob);
129 Direction dir = get_grob_direction (me);
130 Drul_array<Item *> bounds (get_x_bound_item (me, LEFT, dir),
131 get_x_bound_item (me, RIGHT, dir));
133 Drul_array<bool> connect_to_other (false, false);
137 Direction break_dir = bounds[d]->break_status_dir ();
139 Spanner *orig_spanner = dynamic_cast<Spanner*> (me->original ());
141 vsize neighbor_idx = me->get_break_index () - break_dir;
144 && neighbor_idx < orig_spanner->broken_intos_.size ())
146 Grob *neighbor = orig_spanner->broken_intos_[neighbor_idx];
148 /* trigger possible suicide*/
149 (void) neighbor->get_property ("positions");
154 && neighbor_idx < orig_spanner->broken_intos_.size ()
155 && orig_spanner->broken_intos_[neighbor_idx]->is_live ());
157 while (flip (&d) != LEFT);
160 if (connect_to_other[LEFT] || connect_to_other[RIGHT])
161 return scm_cons (scm_from_bool (connect_to_other[LEFT]),
162 scm_from_bool (connect_to_other[RIGHT]));
168 Tuplet_bracket::get_common_x (Spanner *me)
170 extract_grob_set (me, "note-columns", columns);
172 Grob * commonx = common_refpoint_of_array (columns, me, X_AXIS);
173 commonx = commonx->common_refpoint (me->get_bound (LEFT), X_AXIS);
174 commonx = commonx->common_refpoint (me->get_bound (RIGHT), X_AXIS);
179 MAKE_SCHEME_CALLBACK(Tuplet_bracket,calc_control_points,1)
181 Tuplet_bracket::calc_control_points (SCM smob)
183 Spanner *me = unsmob_spanner (smob);
185 extract_grob_set (me, "note-columns", columns);
187 SCM scm_positions = me->get_property ("positions");
191 if (!scm_is_pair (scm_positions))
192 programming_error ("Positions should be number pair");
194 Drul_array<Real> positions
195 = robust_scm2drul (scm_positions, Drul_array<Real> (0,0));
197 Grob *commonx = get_common_x (me);
198 Direction dir = get_grob_direction (me);
200 Drul_array<Item *> bounds;
201 bounds[LEFT] = get_x_bound_item (me, LEFT, dir);
202 bounds[RIGHT] = get_x_bound_item (me, RIGHT, dir);
204 Drul_array<bool> connect_to_other =
205 robust_scm2booldrul (me->get_property ("connect-to-neighbor"),
206 Drul_array<bool> (false, false));
213 x_span[d] = robust_relative_extent (bounds[d], commonx, X_AXIS)[d];
215 if (connect_to_other[d])
217 Interval overshoot (robust_scm2drul (me->get_property ("break-overshoot"),
218 Interval (-0.5, 0.0)));
221 x_span[d] += d * overshoot[d];
223 x_span[d] = robust_relative_extent (bounds[d], commonx, X_AXIS)[RIGHT]
229 || (bounds[d]->get_column ()
230 != dynamic_cast<Item *> (columns.back ())->get_column ())))
233 We're connecting to a column, for the last bit of a broken
236 TODO: make padding tunable?
240 if (bounds[d]->break_status_dir ())
244 = robust_relative_extent (bounds[d], commonx, X_AXIS) [LEFT]
248 while (flip (&d) != LEFT);
252 x_span -= me->get_bound (LEFT)->relative_coordinate (commonx, X_AXIS);
253 return scm_list_2 (ly_offset2scm (Offset (x_span[LEFT], positions[LEFT])),
254 ly_offset2scm (Offset (x_span[RIGHT], positions[RIGHT])));
260 in the case that there is no bracket, but there is a (single) beam,
261 follow beam precisely for determining tuplet number location.
263 MAKE_SCHEME_CALLBACK (Tuplet_bracket, print, 1);
265 Tuplet_bracket::print (SCM smob)
267 Spanner *me = unsmob_spanner (smob);
270 extract_grob_set (me, "note-columns", columns);
271 bool equally_long = false;
272 Grob *par_beam = parallel_beam (me, columns, &equally_long);
274 bool bracket_visibility = !(par_beam && equally_long);
276 Fixme: the type of this prop is sucky.
278 SCM bracket = me->get_property ("bracket-visibility");
279 if (scm_is_bool (bracket))
280 bracket_visibility = ly_scm2bool (bracket);
281 else if (bracket == ly_symbol2scm ("if-no-beam"))
282 bracket_visibility = !par_beam;
285 SCM cpoints = me->get_property ("control-points");
286 if (scm_ilength (cpoints) < 2)
292 Drul_array<Offset> points;
293 points[LEFT] = ly_scm2offset (scm_car (cpoints));
294 points[RIGHT] = ly_scm2offset (scm_cadr (cpoints));
296 Interval x_span (points[LEFT][X_AXIS], points[RIGHT][X_AXIS]);
297 Drul_array<Real> positions (points[LEFT][Y_AXIS], points[RIGHT][Y_AXIS]);
301 Output_def *pap = me->layout ();
303 Grob *number_grob = unsmob_grob (me->get_object ("tuplet-number"));
306 No bracket when it would be smaller than the number.
309 if (bracket_visibility && number_grob)
311 Interval ext = number_grob->extent (number_grob, X_AXIS);
312 if (!ext.is_empty ())
314 gap = ext.length () + 1.0;
316 if (0.75 * x_span.length () < gap)
317 bracket_visibility = false;
321 if (bracket_visibility)
323 Drul_array<Real> zero (0, 0);
324 Real ss = Staff_symbol_referencer::staff_space (me);
325 Drul_array<Real> height
326 = robust_scm2drul (me->get_property ("edge-height"), zero);
327 Drul_array<Real> flare
328 = robust_scm2drul (me->get_property ("bracket-flare"), zero);
329 Drul_array<Real> shorten
330 = robust_scm2drul (me->get_property ("shorten-pair"), zero);
331 Drul_array<Stencil> edge_stencils;
333 Direction dir = get_grob_direction (me);
335 scale_drul (&height, -ss * dir);
336 scale_drul (&flare, ss);
337 scale_drul (&shorten, ss);
339 Drul_array<bool> connect_to_other =
340 robust_scm2booldrul (me->get_property ("connect-to-neighbor"),
341 Drul_array<bool> (false, false));
346 if (connect_to_other[d])
352 SCM edge_text = me->get_property ("edge-text");
354 if (scm_is_pair (edge_text))
356 SCM properties = Font_interface::text_font_alist_chain (me);
357 SCM text = index_get_cell (edge_text, d);
358 if (Text_interface::is_markup (text))
360 SCM t = Text_interface::interpret_markup (pap->self_scm (),
363 Stencil *edge_text = unsmob_stencil (t);
364 edge_text->translate_axis (x_span[d] - x_span[LEFT], X_AXIS);
365 edge_stencils[d] = *edge_text;
370 while (flip (&d) != LEFT);
372 Stencil brack = make_bracket (me, Y_AXIS,
373 points[RIGHT] - points[LEFT],
376 0.1 = more space at right due to italics
377 TODO: use italic correction of font.
379 Interval (-0.5, 0.5) * gap + 0.1,
384 if (!edge_stencils[d].is_empty ())
385 brack.add_stencil (edge_stencils[d]);
387 while (flip (&d) != LEFT);
389 mol.add_stencil (brack);
392 mol.translate (points[LEFT]);
393 return mol.smobbed_copy ();
397 should move to lookup?
399 TODO: this will fail for very short (shorter than the flare)
403 Tuplet_bracket::make_bracket (Grob *me, // for line properties.
406 Drul_array<Real> height,
408 Drul_array<Real> flare,
409 Drul_array<Real> shorten)
411 Drul_array<Offset> corners (Offset (0, 0), dz);
413 Real length = dz.length ();
414 Drul_array<Offset> gap_corners;
416 Axis bracket_axis = other_axis (protusion_axis);
418 Drul_array<Offset> straight_corners = corners;
422 straight_corners[d] += -d * shorten[d] / length * dz;
423 while (flip (&d) != LEFT);
425 if (!gap.is_empty ())
428 gap_corners[d] = (dz * 0.5) + gap[d] / length * dz;
429 while (flip (&d) != LEFT);
432 Drul_array<Offset> flare_corners = straight_corners;
435 flare_corners[d][bracket_axis] = straight_corners[d][bracket_axis];
436 flare_corners[d][protusion_axis] += height[d];
437 straight_corners[d][bracket_axis] += -d * flare[d];
439 while (flip (&d) != LEFT);
444 if (!gap.is_empty ())
445 m.add_stencil (Line_interface::line (me, straight_corners[d],
448 m.add_stencil (Line_interface::line (me, straight_corners[d],
452 while (flip (&d) != LEFT);
455 m.add_stencil (Line_interface::line (me, straight_corners[LEFT],
456 straight_corners[RIGHT]));
462 Tuplet_bracket::get_bounds (Grob *me, Grob **left, Grob **right)
464 extract_grob_set (me, "note-columns", columns);
466 while (l < columns.size () && Note_column::has_rests (columns[l]))
469 vsize r = columns.size ();
470 while (r > l && Note_column::has_rests (columns[r-1]))
478 *right = columns[r-1];
483 use first -> last note for slope, and then correct for disturbing
486 Tuplet_bracket::calc_position_and_height (Grob *me_grob, Real *offset, Real *dy)
488 Spanner *me = dynamic_cast<Spanner *> (me_grob);
490 extract_grob_set (me, "note-columns", columns);
491 extract_grob_set (me, "tuplets", tuplets);
493 Grob *commony = common_refpoint_of_array (columns, me, Y_AXIS);
494 commony = common_refpoint_of_array (tuplets, commony, Y_AXIS);
495 if (Grob *st = Staff_symbol_referencer::get_staff_symbol (me))
496 commony = st->common_refpoint (commony, Y_AXIS);
498 Grob *commonx = get_common_x (me);
499 commonx = common_refpoint_of_array (tuplets, commonx, Y_AXIS);
502 if (Grob *st = Staff_symbol_referencer::get_staff_symbol (me))
504 Real pad = robust_scm2double (me->get_property ("staff-padding"), -1.0);
507 staff = st->extent (commony, Y_AXIS);
512 Direction dir = get_grob_direction (me);
514 bool equally_long = false;
515 Grob *par_beam = parallel_beam (me, columns, &equally_long);
519 Item *lgr = get_x_bound_item (me, LEFT, dir);
520 Item *rgr = get_x_bound_item (me, RIGHT, dir);
521 Real x0 = robust_relative_extent (lgr, commonx, X_AXIS)[LEFT];
522 Real x1 = robust_relative_extent (rgr, commonx, X_AXIS)[RIGHT];
524 vector<Offset> points;
528 && get_grob_direction (par_beam) == dir
529 && Note_column::get_stem (columns[0])
530 && Note_column::get_stem (columns.back ()))
533 trigger set_stem_ends
535 (void) par_beam->get_property ("quantized-positions");
538 Drul_array<Grob *> stems (Note_column::get_stem (columns[0]),
539 Note_column::get_stem (columns.back ()));
544 Real ss = 0.5 * Staff_symbol_referencer::staff_space (me);
545 Real lp = ss * robust_scm2double (stems[LEFT]->get_property ("stem-end-position"), 0.0);
546 Real rp = ss * robust_scm2double (stems[RIGHT]->get_property ("stem-end-position"), 0.0);
549 points.push_back (Offset (stems[LEFT]->relative_coordinate (commonx, X_AXIS) - x0, lp));
550 points.push_back (Offset (stems[RIGHT]->relative_coordinate (commonx, X_AXIS) - x0, rp));
555 Use outer non-rest columns to determine slope
559 get_bounds (me, &left_col, &right_col);
560 if (left_col && right_col)
562 Interval rv = right_col->extent (commony, Y_AXIS);
563 Interval lv = left_col->extent (commony, Y_AXIS);
566 Real graphical_dy = rv[dir] - lv[dir];
568 Slice ls = Note_column::head_positions_interval (left_col);
569 Slice rs = Note_column::head_positions_interval (right_col);
572 musical_dy[UP] = rs[UP] - ls[UP];
573 musical_dy[DOWN] = rs[DOWN] - ls[DOWN];
574 if (sign (musical_dy[UP]) != sign (musical_dy[DOWN]))
576 else if (sign (graphical_dy) != sign (musical_dy[DOWN]))
584 *offset = -dir * infinity_f;
585 for (vsize i = 0; i < columns.size (); i++)
587 Interval note_ext = columns[i]->extent (commony, Y_AXIS);
588 Real notey = note_ext[dir] - me->relative_coordinate (commony, Y_AXIS);
590 Real x = columns[i]->relative_coordinate (commonx, X_AXIS) - x0;
591 points.push_back (Offset (x, notey));
595 if (!(par_beam && get_grob_direction (par_beam) == dir))
597 points.push_back (Offset (x0 - x0, staff[dir]));
598 points.push_back (Offset (x1 - x0, staff[dir]));
602 This is a slight hack. We compute two encompass points from the
603 bbox of the smaller tuplets.
605 We assume that the smaller bracket is 1.0 space high.
607 Real ss = Staff_symbol_referencer::staff_space (me);
608 for (vsize i = 0; i < tuplets.size (); i++)
610 Interval tuplet_x (tuplets[i]->extent (commonx, X_AXIS));
611 Interval tuplet_y (tuplets[i]->extent (commony, Y_AXIS));
613 if (!tuplets[i]->is_live ())
617 Drul_array<Real> positions = robust_scm2interval (tuplets[i]->get_property ("positions"),
621 Real other_dy = positions[RIGHT] - positions[LEFT];
626 = tuplet_y.linear_combination (d * sign (other_dy));
629 We don't take padding into account for nested tuplets.
630 the edges can come very close to the stems, likewise for
634 points.push_back (Offset (tuplet_x[d] - x0, y));
636 while (flip (&d) != LEFT);
639 Real factor = (columns.size () > 1) ? 1 / (x1 - x0) : 1.0;
640 for (vsize i = 0; i < points.size (); i++)
642 Real x = points[i][X_AXIS];
643 Real tuplety = (*dy) * x * factor;
645 if (points[i][Y_AXIS] * dir > (*offset + tuplety) * dir)
646 *offset = points[i][Y_AXIS] - tuplety;
649 *offset += scm_to_double (me->get_property ("padding")) * dir;
652 horizontal brackets should not collide with staff lines.
654 Kind of pointless since we put them outside the staff anyway, but
655 let's leave code for the future when possibly allow them to move
656 into the staff once again.
659 && fabs (*offset) < ss * Staff_symbol_referencer::staff_radius (me))
661 // quantize, then do collision check.
664 *offset = rint (*offset);
665 if (Staff_symbol_referencer::on_line (me, (int) rint (*offset)))
673 MAKE_SCHEME_CALLBACK (Tuplet_bracket, calc_direction, 1);
675 Tuplet_bracket::calc_direction (SCM smob)
677 Grob *me = unsmob_grob (smob);
678 Direction dir = Tuplet_bracket::get_default_dir (me);
679 return scm_from_int (dir);
682 MAKE_SCHEME_CALLBACK (Tuplet_bracket, calc_positions, 1);
684 Tuplet_bracket::calc_positions (SCM smob)
686 Spanner *me = unsmob_spanner (smob);
689 Don't print if it doesn't span time.
691 if (robust_scm2moment (me->get_bound (LEFT)->get_column ()->get_property ("when"), Moment (0))
692 == robust_scm2moment (me->get_bound (RIGHT)->get_column ()->get_property ("when"), Moment (0)))
700 calc_position_and_height (me, &offset, &dy);
702 SCM x = scm_cons (scm_from_double (offset),
703 scm_from_double (offset + dy));
712 Tuplet_bracket::get_default_dir (Grob *me)
714 Drul_array<int> dirs (0, 0);
715 extract_grob_set (me, "note-columns", columns);
716 for (vsize i = 0; i < columns.size (); i++)
718 Grob *nc = columns[i];
719 Direction d = Note_column::dir (nc);
724 return dirs[UP] >= dirs[DOWN] ? UP : DOWN;
728 Tuplet_bracket::add_column (Grob *me, Item *n)
730 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n);
731 add_bound_item (dynamic_cast<Spanner *> (me), n);
735 Tuplet_bracket::add_tuplet_bracket (Grob *me, Grob *bracket)
737 Pointer_group_interface::add_grob (me, ly_symbol2scm ("tuplets"), bracket);
740 ADD_INTERFACE (Tuplet_bracket,
741 "A bracket with a number in the middle, used for tuplets. "
742 "When the bracket spans a line break, the value of "
743 "@code{break-overshoot} determines how far it extends "
745 "At a line break, the markups in the @code{edge-text} are printed "
751 "bracket-visibility "
753 "connect-to-neighbor "