2 tuplet-bracket.cc -- implement Tuplet_bracket
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 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
28 TODO: quantise, we don't want to collide with staff lines.
29 (or should we be above staff?)
31 todo: handle breaking elegantly.
36 #include "tuplet-bracket.hh"
37 #include "line-interface.hh"
40 #include "font-interface.hh"
41 #include "output-def.hh"
42 #include "text-item.hh"
44 #include "note-column.hh"
45 #include "group-interface.hh"
46 #include "directional-element-interface.hh"
48 #include "staff-symbol-referencer.hh"
52 get_x_bound_grob (Grob *g, Direction my_dir)
54 if (Note_column::get_stem (g)
55 && Note_column::dir (g) == my_dir)
57 g = Note_column::get_stem (g);
65 Tuplet_bracket::parallel_beam (Grob *me, Link_array<Grob> const &cols, bool *equally_long)
70 Grob *s1 = Note_column::get_stem (cols[0]);
71 Grob *s2 = Note_column::get_stem (cols.top ());
73 Grob*b1 = s1 ? Stem::get_beam (s1) : 0;
74 Grob*b2 = s2 ? Stem::get_beam (s2) : 0;
76 Spanner*sp = dynamic_cast<Spanner*> (me);
78 *equally_long = false;
79 if (! (b1 && (b1 == b2) && !sp->is_broken ()))
82 Link_array<Grob> beam_stems = extract_grob_array (b1, ly_symbol2scm ("stems"));
83 if (beam_stems.size () == 0)
85 programming_error ("Beam under tuplet bracket has no stems!");
90 *equally_long = (beam_stems[0] == s1 && beam_stems.top () == s2);
98 in the case that there is no bracket, but there is a (single) beam,
99 follow beam precisely for determining tuplet number location.
102 MAKE_SCHEME_CALLBACK (Tuplet_bracket, print, 1);
104 Tuplet_bracket::print (SCM smob)
106 Grob *me = unsmob_grob (smob);
108 Link_array<Grob> columns =
109 extract_grob_array (me, ly_symbol2scm ("note-columns"));
111 if (!columns.size ())
112 return mol.smobbed_copy ();
115 SCM lp = me->get_property ("left-position");
116 SCM rp = me->get_property ("right-position");
118 if (!scm_is_number (rp) || !scm_is_number (lp))
119 after_line_breaking (smob);
122 Real ly = robust_scm2double (me->get_property ("left-position"), 0);
123 Real ry = robust_scm2double (me->get_property ("right-position"), 0);
125 bool equally_long = false;
126 Grob * par_beam = parallel_beam (me, columns, &equally_long);
128 Spanner*sp = dynamic_cast<Spanner*> (me);
130 bool bracket_visibility = !(par_beam && equally_long);
131 bool number_visibility = true;
134 Fixme: the type of this prop is sucky.
136 SCM bracket = me->get_property ("bracket-visibility");
137 if (scm_is_bool (bracket))
139 bracket_visibility = ly_scm2bool (bracket);
141 else if (bracket == ly_symbol2scm ("if-no-beam"))
142 bracket_visibility = !par_beam;
144 SCM numb = me->get_property ("number-visibility");
145 if (scm_is_bool (numb))
147 number_visibility = ly_scm2bool (numb);
149 else if (numb == ly_symbol2scm ("if-no-beam"))
150 number_visibility = !par_beam;
152 Grob * commonx = columns[0]->common_refpoint (columns.top (), X_AXIS);
155 Tuplet brackets are normally not broken, but we shouldn't crash if
158 commonx = commonx->common_refpoint (sp->get_bound (LEFT), X_AXIS);
159 commonx = commonx->common_refpoint (sp->get_bound (RIGHT), X_AXIS);
161 Direction dir = get_grob_direction (me);
163 Grob * lgr = get_x_bound_grob (columns[0], dir);
164 Grob * rgr = get_x_bound_grob (columns.top (), dir);
166 Real x0 = robust_relative_extent (lgr, commonx, X_AXIS)[LEFT];
167 Real x1 = robust_relative_extent (rgr, commonx, X_AXIS)[RIGHT];
170 SCM number = me->get_property ("text");
172 Output_def *pap = me->get_layout ();
174 if (scm_is_string (number) && number_visibility)
176 SCM properties = Font_interface::text_font_alist_chain (me);
177 SCM snum = Text_interface::interpret_markup (pap->self_scm (), properties, number);
178 num = *unsmob_stencil (snum);
179 num.align_to (X_AXIS, CENTER);
180 num.translate_axis (w/2, X_AXIS);
181 num.align_to (Y_AXIS, CENTER);
183 num.translate_axis ((ry-ly)/2, Y_AXIS);
185 mol.add_stencil (num);
190 No bracket when it would be smaller than the number.
192 TODO: should use GAP in calculation too.
194 if (bracket_visibility && number_visibility
195 && mol.extent (X_AXIS).length () > w)
197 bracket_visibility = false;
200 if (bracket_visibility)
202 Real ss = Staff_symbol_referencer::staff_space (me);
205 if (!num.extent (X_AXIS).is_empty ())
206 gap = num.extent (X_AXIS).length () + 1.0;
208 SCM fl = me->get_property ("bracket-flare");
209 SCM eh = me->get_property ("edge-height");
210 SCM sp = me->get_property ("shorten-pair");
213 Drul_array<Real> height, flare, shorten;
215 flare[d] = height[d] = shorten[d] = 0.0;
216 if (is_number_pair (fl))
217 flare[d] += ss * scm_to_double (index_get_cell (fl, d));
218 if (is_number_pair (eh))
219 height[d] += - dir * ss *scm_to_double (index_get_cell (eh, d));
220 if (is_number_pair (sp))
221 shorten[d] += ss *scm_to_double (index_get_cell (sp, d));
223 while (flip (&d) != LEFT);
225 Stencil brack = make_bracket (me, Y_AXIS,
229 0.1 = more space at right due to italics
230 TODO: use italic correction of font.
232 Interval (-0.5, 0.5) * gap + 0.1,
234 mol.add_stencil (brack);
237 mol.translate_axis (ly, Y_AXIS);
238 mol.translate_axis (x0 - sp->get_bound (LEFT)->relative_coordinate (commonx, X_AXIS), X_AXIS);
239 return mol.smobbed_copy ();
243 should move to lookup?
245 TODO: this will fail for very short (shorter than the flare)
249 Tuplet_bracket::make_bracket (Grob *me, // for line properties.
252 Drul_array<Real> height,
254 Drul_array<Real> flare,
255 Drul_array<Real> shorten)
257 Drul_array<Offset> corners (Offset (0, 0), dz);
259 Real length = dz.length ();
260 Drul_array<Offset> gap_corners;
263 Axis bracket_axis = other_axis (protusion_axis);
265 Drul_array<Offset> straight_corners = corners;
269 straight_corners[d] += - d * shorten[d] /length * dz;
270 } while (flip (&d) != LEFT);
274 gap = Interval (0, 0);
276 gap_corners[d] = (dz * 0.5) + gap[d] / length * dz;
277 } while (flip (&d) != LEFT);
279 Drul_array<Offset> flare_corners = straight_corners;
281 flare_corners[d][bracket_axis] = straight_corners[d][bracket_axis];
282 flare_corners[d][protusion_axis] += height[d];
283 straight_corners[d][bracket_axis] += - d * flare[d];
284 } while (flip (&d) != LEFT);
288 m.add_stencil (Line_interface::line (me, straight_corners[d],
291 m.add_stencil (Line_interface::line (me, straight_corners[d],
293 } while (flip (&d) != LEFT);
300 use first -> last note for slope, and then correct for disturbing
303 Tuplet_bracket::calc_position_and_height (Grob*me, Real *offset, Real * dy)
305 Link_array<Grob> columns =
306 extract_grob_array (me, ly_symbol2scm ("note-columns"));
308 SCM cols = me->get_property ("note-columns");
309 Grob * commony = common_refpoint_of_list (cols, me, Y_AXIS);
310 Grob * commonx = common_refpoint_of_list (cols, me, X_AXIS);
313 if (Grob * st = Staff_symbol_referencer::get_staff_symbol (me))
314 staff = st->extent (commony, Y_AXIS);
316 Direction dir = get_grob_direction (me);
319 Use outer non-rest columns to determine slope
322 while (l <columns.size () && Note_column::has_rests (columns[l]))
325 int r = columns.size ()- 1;
326 while (r >= l && Note_column::has_rests (columns[r]))
331 Interval rv = columns[r]->extent (commony, Y_AXIS);
332 Interval lv = columns[l]->extent (commony, Y_AXIS);
335 Real graphical_dy = rv[dir] - lv[dir];
337 Slice ls = Note_column::head_positions_interval (columns[l]);
338 Slice rs = Note_column::head_positions_interval (columns[r]);
341 musical_dy[UP] = rs[UP] - ls[UP];
342 musical_dy[DOWN] = rs[DOWN] - ls[DOWN];
343 if (sign (musical_dy[UP]) != sign (musical_dy[DOWN]))
345 else if (sign (graphical_dy) != sign (musical_dy[DOWN]))
354 *offset = - dir * infinity_f;
356 if (!columns.size ())
361 Grob * lgr = get_x_bound_grob (columns[0], dir);
362 Grob * rgr = get_x_bound_grob (columns.top (), dir);
363 Real x0 = robust_relative_extent (lgr, commonx, X_AXIS)[LEFT];
364 Real x1 = robust_relative_extent (rgr, commonx, X_AXIS)[RIGHT];
369 Real factor = columns.size () > 1 ? 1/ (x1 - x0) : 1.0;
371 for (int i = 0; i < columns.size (); i++)
373 Interval note_ext = columns[i]->extent (commony, Y_AXIS);
374 note_ext.unite (staff);
375 Real notey = note_ext[dir] - me->relative_coordinate (commony, Y_AXIS);
377 Real x = columns[i]->relative_coordinate (commonx, X_AXIS) - x0;
378 Real tuplety = *dy * x * factor;
380 if (notey * dir > (*offset + tuplety) * dir)
381 *offset = notey - tuplety;
385 *offset += scm_to_double (me->get_property ("padding")) *dir;
389 horizontal brackets should not collide with staff lines.
392 Real ss = Staff_symbol_referencer::staff_space (me);
393 if (*dy == 0 && fabs (*offset) < ss * Staff_symbol_referencer::staff_radius (me))
395 // quantize, then do collision check.
398 *offset = rint (*offset);
399 if (Staff_symbol_referencer::on_staffline (me, (int) rint (*offset)))
410 We depend on the beams if there are any.
412 MAKE_SCHEME_CALLBACK (Tuplet_bracket, before_line_breaking, 1);
414 Tuplet_bracket::before_line_breaking (SCM smob)
416 Grob *me = unsmob_grob (smob);
417 Link_array<Grob> columns =
418 extract_grob_array (me, ly_symbol2scm ("note-columns"));
421 for (int i = columns.size (); i--;)
423 Grob * s = Note_column::get_stem (columns[i]);
424 Grob * b = s ? Stem::get_beam (s): 0;
426 me->add_dependency (b);
428 return SCM_UNSPECIFIED;
431 MAKE_SCHEME_CALLBACK (Tuplet_bracket, after_line_breaking, 1);
434 Tuplet_bracket::after_line_breaking (SCM smob)
436 Grob * me = unsmob_grob (smob);
437 Link_array<Grob> columns =
438 extract_grob_array (me, ly_symbol2scm ("note-columns"));
440 if (!columns.size ())
443 return SCM_UNSPECIFIED;
445 if (dynamic_cast<Spanner*> (me)->is_broken ())
447 me->warning (_("Killing tuplet bracket across linebreak."));
449 return SCM_UNSPECIFIED;
452 Direction dir = get_grob_direction (me);
455 dir = Tuplet_bracket::get_default_dir (me);
456 set_grob_direction (me, dir);
459 bool equally_long = false;
460 Grob * par_beam = parallel_beam (me, columns, &equally_long);
463 We follow the beam only if there is one, and we are next to it.
467 || get_grob_direction (par_beam) != dir)
469 calc_position_and_height (me, &offset, &dy);
473 SCM ps = par_beam->get_property ("positions");
475 Real lp = scm_to_double (scm_car (ps));
476 Real rp = scm_to_double (scm_cdr (ps));
481 offset = lp + dir * (0.5 + scm_to_double (me->get_property ("padding")));
486 SCM lp = me->get_property ("left-position");
487 SCM rp = me->get_property ("right-position");
489 if (scm_is_number (lp) && !scm_is_number (rp))
491 rp = scm_make_real (scm_to_double (lp) + dy);
493 else if (scm_is_number (rp) && !scm_is_number (lp))
495 lp = scm_make_real (scm_to_double (rp) - dy);
497 else if (!scm_is_number (rp) && !scm_is_number (lp))
499 lp = scm_make_real (offset);
500 rp = scm_make_real (offset + dy);
503 me->set_property ("left-position", lp);
504 me->set_property ("right-position", rp);
506 return SCM_UNSPECIFIED;
514 Tuplet_bracket::get_default_dir (Grob*me)
516 Drul_array<int> dirs (0, 0);
517 for (SCM s = me->get_property ("note-columns"); scm_is_pair (s); s = scm_cdr (s))
519 Grob * nc = unsmob_grob (scm_car (s));
520 Direction d = Note_column::dir (nc);
525 return dirs[UP] >= dirs[DOWN] ? UP : DOWN;
529 Tuplet_bracket::add_column (Grob*me, Item*n)
531 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n);
532 me->add_dependency (n);
534 add_bound_item (dynamic_cast<Spanner*> (me), n);
542 ADD_INTERFACE (Tuplet_bracket,
543 "tuplet-bracket-interface",
544 "A bracket with a number in the middle, used for tuplets.",
546 "note-columns bracket-flare edge-height shorten-pair "
547 "padding left-position right-position bracket-visibility "
548 "number-visibility thickness direction");