2 plet-spanner.cc -- implement Tuplet_bracket
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 Jan Nieuwenhuizen <janneke@gnu.org>
12 - tuplet bracket should probably be subject to the same rules as
13 beam sloping/quanting.
15 - There is no support for kneed brackets, or nested brackets.
17 - number placement for parallel beams should be much more advanced:
18 for sloped beams some extra horizontal offset must be introduced.
20 - number placement is usually done over the center note, not the
30 #include "font-interface.hh"
31 #include "molecule.hh"
32 #include "paper-def.hh"
33 #include "text-item.hh"
34 #include "tuplet-bracket.hh"
36 #include "note-column.hh"
37 #include "group-interface.hh"
38 #include "directional-element-interface.hh"
40 #include "staff-symbol-referencer.hh"
45 get_x_bound_grob (Grob *g, Direction my_dir)
47 if (Note_column::get_stem (g)
48 && Note_column::dir (g) == my_dir)
50 g = Note_column::get_stem (g);
58 Tuplet_bracket::parallel_beam (Grob *me, Link_array<Grob> const &cols, bool *equally_long)
63 Grob *s1 = Note_column::get_stem (cols[0]);
64 Grob *s2 = Note_column::get_stem (cols.top());
66 Grob*b1 = s1 ? Stem::get_beam (s1) : 0;
67 Grob*b2 = s2 ? Stem::get_beam (s2) : 0;
69 Spanner*sp = dynamic_cast<Spanner*> (me);
72 if (! ( b1 && (b1 == b2) && !sp->broken_b() ))
75 Link_array<Grob> beam_stems = Pointer_group_interface__extract_grobs
76 (b1, (Grob*)0, "stems");
78 if (beam_stems.size() == 0)
80 programming_error ("Beam under tuplet bracket has no stems!");
85 *equally_long = (beam_stems[0] == s1 && beam_stems.top() == s2);
93 in the case that there is no bracket, but there is a (single) beam,
94 follow beam precisely for determining tuplet number location.
97 MAKE_SCHEME_CALLBACK (Tuplet_bracket,brew_molecule,1);
99 Tuplet_bracket::brew_molecule (SCM smob)
101 Grob *me= unsmob_grob (smob);
103 Link_array<Grob> columns=
104 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
106 if (!columns.size ())
107 return mol.smobbed_copy ();
109 bool equally_long = false;
110 Grob * par_beam = parallel_beam (me, columns, &equally_long);
112 Spanner*sp = dynamic_cast<Spanner*> (me);
114 bool bracket_visibility = !(par_beam && equally_long);
115 bool number_visibility = true;
118 Fixme: the type of this prop is sucky.
120 SCM bracket = me->get_grob_property ("bracket-visibility");
121 if (gh_boolean_p (bracket))
123 bracket_visibility = gh_scm2bool (bracket);
125 else if (bracket == ly_symbol2scm ("if-no-beam"))
126 bracket_visibility = !par_beam;
128 SCM numb = me->get_grob_property ("number-visibility");
129 if (gh_boolean_p (numb))
131 number_visibility = gh_scm2bool (numb);
133 else if (numb == ly_symbol2scm ("if-no-beam"))
134 number_visibility = !par_beam;
136 Grob * commonx = columns[0]->common_refpoint (columns.top (),X_AXIS);
137 Direction dir = Directional_element_interface::get (me);
139 Grob * lgr = get_x_bound_grob (columns[0], dir);
140 Grob * rgr = get_x_bound_grob (columns.top(), dir);
141 Real x0 = lgr->extent (commonx,X_AXIS)[LEFT];
142 Real x1 = rgr->extent (commonx,X_AXIS)[RIGHT];
146 Real ly = gh_scm2double (me->get_grob_property ("left-position"));
147 Real ry = gh_scm2double (me->get_grob_property ("right-position"));
148 SCM number = me->get_grob_property ("text");
150 if (gh_string_p (number) && number_visibility)
152 SCM properties = Font_interface::font_alist_chain (me);
153 Molecule num = Text_item::text2molecule (me, number, properties);
154 num.align_to (X_AXIS, CENTER);
155 num.translate_axis (w/2, X_AXIS);
156 num.align_to (Y_AXIS, CENTER);
158 num.translate_axis ((ry-ly)/2, Y_AXIS);
160 mol.add_molecule (num);
163 if (bracket_visibility)
165 Real lt = me->get_paper ()->get_var ("linethickness");
167 SCM thick = me->get_grob_property ("thickness");
168 if (gh_number_p (thick))
169 lt *= gh_scm2double (thick);
171 SCM gap = me->get_grob_property ("gap");
172 SCM ew = me->get_grob_property ("edge-widen");
173 SCM eh = me->get_grob_property ("edge-height");
174 SCM sp = me->get_grob_property ("shorten-pair");
177 Drul_array<Real> height, width, shorten;
179 width[d] = height[d] = shorten[d] = 0.0;
180 if ( ly_number_pair_p (ew) )
181 width[d] += gh_scm2double (index_get_cell (ew, d));
182 if ( ly_number_pair_p (eh) )
183 height[d] += gh_scm2double (index_get_cell (eh, d)) * - dir;
184 if ( ly_number_pair_p (sp) )
185 shorten[d] += gh_scm2double (index_get_cell (sp, d));
187 while (flip (&d) != LEFT);
189 Molecule brack = make_bracket (Y_AXIS,
195 mol.add_molecule (brack);
198 mol.translate_axis (ly, Y_AXIS);
199 mol.translate_axis (x0 - sp->get_bound (LEFT)->relative_coordinate (commonx,X_AXIS),X_AXIS);
200 return mol.smobbed_copy ();
204 should move to lookup?
207 Tuplet_bracket::make_bracket (Axis protusion_axis,
208 Real dx, Real dy, Real thick, Drul_array<Real> height,
210 Drul_array<Real> widen,
211 Drul_array<Real> shorten)
213 Real len = Offset (dx,dy).length ();
214 Real gapx = dx * (gap / len);
215 Real gapy = dy * (gap / len);
216 Drul_array<Real> shortx, shorty;
219 shortx[d] = dx * (shorten[d] / len);
220 shorty[d] = dy * (shorten[d] / len);
222 while (flip (&d) != LEFT);
223 Axis other = other_axis (protusion_axis);
225 Molecule l1 = Lookup::line (thick, Offset(shortx[LEFT], shorty[LEFT]),
226 Offset ( (dx - gapx)/2, (dy - gapy)/2 ));
228 Molecule l2 = Lookup::line (thick, Offset((dx + gapx) / 2,(dy + gapy) / 2),
229 Offset (dx - shortx[RIGHT], dy - shorty[RIGHT]));
232 protusion[other] = -widen[LEFT];
233 protusion[protusion_axis] = height[LEFT];
234 Molecule p1 = Lookup::line (thick,
235 Offset(shortx[LEFT], shorty[LEFT]),
236 Offset(shortx[LEFT], shorty[LEFT]) + protusion);
237 protusion[other] = widen[RIGHT];
238 protusion[protusion_axis] = height[RIGHT];
239 Molecule p2 = Lookup::line (thick,
240 Offset(dx - shortx[RIGHT], dy - shorty[RIGHT]),
241 Offset(dx - shortx[RIGHT], dy - shorty[RIGHT]) + protusion);
254 use first -> last note for slope, and then correct for disturbing
257 Tuplet_bracket::calc_position_and_height (Grob*me,Real *offset, Real * dy)
259 Link_array<Grob> columns=
260 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
263 SCM cols = me->get_grob_property ("note-columns");
264 Grob * commony = common_refpoint_of_list (cols, me, Y_AXIS);
265 Grob * commonx = common_refpoint_of_list (cols, me, X_AXIS);
267 Direction dir = Directional_element_interface::get (me);
270 Use outer non-rest columns to determine slope
273 while (l <columns.size () && Note_column::rest_b (columns[l]))
276 int r = columns.size ()- 1;
277 while (r >= l && Note_column::rest_b (columns[r]))
282 *dy = columns[r]->extent (commony, Y_AXIS) [dir]
283 - columns[l]->extent (commony, Y_AXIS) [dir] ;
289 *offset = - dir * infinity_f;
291 if (!columns.size ())
296 Grob * lgr = get_x_bound_grob (columns[0], dir);
297 Grob * rgr = get_x_bound_grob (columns.top(), dir);
298 Real x0 = lgr->extent (commonx,X_AXIS)[LEFT];
299 Real x1 = rgr->extent (commonx,X_AXIS)[RIGHT];
305 Real factor = columns.size () > 1 ? 1/ (x1 - x0) : 1.0;
307 for (int i = 0; i < columns.size (); i++)
309 Real notey = columns[i]->extent (commony, Y_AXIS)[dir]
310 - me->relative_coordinate (commony, Y_AXIS);
312 Real x = columns[i]->relative_coordinate (commonx, X_AXIS) - x0;
313 Real tuplety = *dy * x * factor;
315 if (notey * dir > (*offset + tuplety) * dir)
316 *offset = notey - tuplety;
320 *offset += gh_scm2double (me->get_grob_property ("padding")) *dir;
324 horizontal brackets should not collide with staff lines.
328 // quantize, then do collision check.
329 Real ss= Staff_symbol_referencer::staff_space (me);
332 *offset = rint (*offset);
333 if (Staff_symbol_referencer::on_staffline (me, (int) rint (*offset)))
342 use first -> last note for slope,
345 Tuplet_bracket::calc_dy (Grob*me,Real * dy)
347 Link_array<Grob> columns=
348 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
353 Direction d = Directional_element_interface::get (me);
354 *dy = columns.top ()->extent (columns.top (), Y_AXIS) [d]
355 - columns[0]->extent (columns[0], Y_AXIS) [d];
360 We depend on the beams if there are any.
362 MAKE_SCHEME_CALLBACK (Tuplet_bracket,before_line_breaking,1);
364 Tuplet_bracket::before_line_breaking (SCM smob)
366 Grob *me = unsmob_grob (smob);
367 Link_array<Grob> columns=
368 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
371 for (int i = columns.size(); i--;)
373 Grob * s =Note_column::get_stem (columns[i]);
374 Grob * b = s ? Stem::get_beam (s): 0;
376 me->add_dependency (b);
378 return SCM_UNDEFINED;
381 MAKE_SCHEME_CALLBACK (Tuplet_bracket,after_line_breaking,1);
384 Tuplet_bracket::after_line_breaking (SCM smob)
386 Grob * me = unsmob_grob (smob);
387 Link_array<Grob> columns=
388 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
390 if (!columns.size ())
393 return SCM_UNSPECIFIED;
395 if (dynamic_cast<Spanner*> (me)->broken_b ())
397 me->warning ( "Tuplet_bracket was across linebreak. Farewell cruel world.");
399 return SCM_UNSPECIFIED;
402 Direction dir = Directional_element_interface::get (me);
405 dir = Tuplet_bracket::get_default_dir (me);
406 Directional_element_interface::set (me, dir);
409 bool equally_long = false;
410 Grob * par_beam = parallel_beam (me, columns, &equally_long);
413 We follow the beam only if there is one, and we are next to it.
417 || Directional_element_interface::get (par_beam) != dir)
419 calc_position_and_height (me,&offset,&dy);
423 SCM ps = par_beam->get_grob_property ("positions");
425 Real lp = gh_scm2double (gh_car (ps));
426 Real rp = gh_scm2double (gh_cdr (ps));
431 offset = lp + dir * (0.5 + gh_scm2double (me->get_grob_property ("padding")));
436 SCM lp = me->get_grob_property ("left-position");
437 SCM rp = me->get_grob_property ("right-position");
439 if (gh_number_p (lp) && !gh_number_p (rp))
441 rp = gh_double2scm (gh_scm2double (lp) + dy);
443 else if (gh_number_p (rp) && !gh_number_p (lp))
445 lp = gh_double2scm (gh_scm2double (rp) - dy);
447 else if (!gh_number_p (rp) && !gh_number_p (lp))
449 lp = gh_double2scm (offset);
450 rp = gh_double2scm (offset +dy);
453 me->set_grob_property ("left-position", lp);
454 me->set_grob_property ("right-position", rp);
456 return SCM_UNSPECIFIED;
464 Tuplet_bracket::get_default_dir (Grob*me)
467 for (SCM s = me->get_grob_property ("note-columns"); gh_pair_p (s); s = ly_cdr (s))
469 Grob * nc = unsmob_grob (ly_car (s));
470 if (Note_column::dir (nc) < 0)
480 Tuplet_bracket::add_column (Grob*me, Item*n)
482 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n);
483 me->add_dependency (n);
485 add_bound_item (dynamic_cast<Spanner*> (me), n);
493 ADD_INTERFACE (Tuplet_bracket,"tuplet-bracket-interface",
494 "A bracket with a number in the middle, used for tuplets.",
495 "note-columns edge-widen edge-height shorten-pair padding gap left-position right-position bracket-visibility number-visibility thickness direction");