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_offset (Grob *g, Grob *common, Direction my_dir)
47 if (Note_column::stem_l (g)
48 && Note_column::dir (g) == my_dir)
50 g = Note_column::stem_l (g);
52 return g->relative_coordinate (common, X_AXIS);
58 Tuplet_bracket::parallel_beam (Grob *me, Link_array<Grob> cols, bool *equally_long)
63 Grob *s1 = Note_column::stem_l (cols[0]);
64 Grob *s2 = Note_column::stem_l (cols.top());
66 Grob*b1 = s1 ? Stem::beam_l (s1) : 0;
67 Grob*b2 = s2 ? Stem::beam_l (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");
79 *equally_long = (beam_stems[0] == s1 && beam_stems.top() == s2);
87 in the case that there is no bracket, but there is a (single) beam,
88 follow beam precisely for determining tuplet number location.
91 MAKE_SCHEME_CALLBACK (Tuplet_bracket,brew_molecule,1);
93 Tuplet_bracket::brew_molecule (SCM smob)
95 Grob *me= unsmob_grob (smob);
97 Link_array<Grob> column_arr=
98 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
100 if (!column_arr.size ())
101 return mol.smobbed_copy ();
103 bool equally_long = false;
104 Grob * par_beam = parallel_beam (me, column_arr, &equally_long);
106 Spanner*sp = dynamic_cast<Spanner*> (me);
108 bool bracket_visibility = !(par_beam && equally_long);
109 bool number_visibility = true;
112 Fixme: the type of this prop is sucky.
114 SCM bracket = me->get_grob_property ("bracket-visibility");
115 if (gh_boolean_p (bracket))
117 bracket_visibility = gh_scm2bool (bracket);
119 else if (bracket == ly_symbol2scm ("if-no-beam"))
120 bracket_visibility = !par_beam;
122 SCM numb = me->get_grob_property ("number-visibility");
123 if (gh_boolean_p (numb))
125 number_visibility = gh_scm2bool (numb);
127 else if (numb == ly_symbol2scm ("if-no-beam"))
128 number_visibility = !par_beam;
130 Grob * commonx = column_arr[0]->common_refpoint (column_arr.top (),X_AXIS);
131 Direction dir = Directional_element_interface::get (me);
133 Real x0 = get_x_offset (column_arr[0], commonx, dir);
134 Real x1 = get_x_offset (column_arr.top(), commonx, dir);
137 Real ly = gh_scm2double (me->get_grob_property ("left-position"));
138 Real ry = gh_scm2double (me->get_grob_property ("right-position"));
139 SCM number = me->get_grob_property ("text");
141 if (gh_string_p (number) && number_visibility)
143 SCM properties = Font_interface::font_alist_chain (me);
144 Molecule num = Text_item::text2molecule (me, number, properties);
145 num.align_to (X_AXIS, CENTER);
146 num.translate_axis (w/2, X_AXIS);
147 num.align_to (Y_AXIS, CENTER);
149 num.translate_axis ((ry-ly)/2, Y_AXIS);
151 mol.add_molecule (num);
154 if (bracket_visibility)
156 Real lt = me->paper_l ()->get_var ("linethickness");
158 SCM thick = me->get_grob_property ("thickness");
159 if (gh_number_p (thick))
160 lt *= gh_scm2double (thick);
162 SCM gap = me->get_grob_property ("gap");
164 Real prot_size = 0.7; // magic.
166 Molecule brack = make_bracket (Y_AXIS,
168 -prot_size*dir, -prot_size*dir,
171 mol.add_molecule (brack);
174 mol.translate_axis (ly, Y_AXIS);
175 mol.translate_axis (x0 - sp->get_bound (LEFT)->relative_coordinate (commonx,X_AXIS),X_AXIS);
176 return mol.smobbed_copy ();
180 should move to lookup?
183 Tuplet_bracket::make_bracket (Axis protusion_axis,
184 Real dx, Real dy, Real thick, Real lprotrusion,
185 Real rprotrusion, Real gap, Real left_widen,
188 Real len = Offset (dx,dy).length ();
189 Real gapx = dx* (gap / len);
190 Real gapy = dy* (gap / len);
191 Axis other = other_axis (protusion_axis);
193 Molecule l1 = Lookup::line (thick, Offset(0,0),
194 Offset ( (dx - gapx)/2, (dy - gapy)/2 ));
195 Molecule l2 = Lookup::line (thick, Offset((dx + gapx) / 2,(dy + gapy) / 2),
200 protusion[other] = left_widen;
201 protusion[protusion_axis] = lprotrusion;
203 Molecule p1 = Lookup::line (thick, Offset(0,0), protusion);
205 protusion[other] = right_widen;
206 protusion[protusion_axis] = rprotrusion;
207 Molecule p2 = Lookup::line (thick, Offset(dx,dy),Offset(dx,dy) + protusion);
221 use first -> last note for slope, and then correct for disturbing
224 Tuplet_bracket::calc_position_and_height (Grob*me,Real *offset, Real * dy)
226 Link_array<Grob> column_arr=
227 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
230 Grob * commony = me->common_refpoint (me->get_grob_property ("note-columns"), Y_AXIS);
231 Grob * commonx = me->common_refpoint (me->get_grob_property ("note-columns"), X_AXIS);
233 Direction d = Directional_element_interface::get (me);
236 Use outer non-rest columns to determine slope
239 while (l <column_arr.size () && Note_column::rest_b (column_arr[l]))
242 int r = column_arr.size ()- 1;
243 while (r >= l && Note_column::rest_b (column_arr[r]))
248 *dy = column_arr[r]->extent (commony, Y_AXIS) [d]
249 - column_arr[l]->extent (commony, Y_AXIS) [d] ;
255 *offset = - d * infinity_f;
257 if (!column_arr.size ())
262 Real x0 = get_x_offset (column_arr[0], commonx, d);
263 Real x1 = get_x_offset (column_arr.top(), commonx, d);
268 Real factor = column_arr.size () > 1 ? 1/ (x1 - x0) : 1.0;
270 for (int i = 0; i < column_arr.size (); i++)
272 Real notey = column_arr[i]->extent (commony, Y_AXIS)[d]
273 - me->relative_coordinate (commony, Y_AXIS);
275 Real x = column_arr[i]->relative_coordinate (commonx, X_AXIS) - x0;
276 Real tuplety = *dy * x * factor;
278 if (notey * d > (*offset + tuplety) * d)
279 *offset = notey - tuplety;
283 *offset += gh_scm2double (me->get_grob_property ("padding")) *d;
287 horizontal brackets should not collide with staff lines.
291 // quantize, then do collision check.
292 Real ss= Staff_symbol_referencer::staff_space (me);
295 *offset = rint (*offset);
296 if (Staff_symbol_referencer::on_staffline (me, (int) rint (*offset)))
305 use first -> last note for slope,
308 Tuplet_bracket::calc_dy (Grob*me,Real * dy)
310 Link_array<Grob> column_arr=
311 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
316 Direction d = Directional_element_interface::get (me);
317 *dy = column_arr.top ()->extent (column_arr.top (), Y_AXIS) [d]
318 - column_arr[0]->extent (column_arr[0], Y_AXIS) [d];
323 We depend on the beams if there are any.
325 MAKE_SCHEME_CALLBACK (Tuplet_bracket,before_line_breaking,1);
327 Tuplet_bracket::before_line_breaking (SCM smob)
329 Grob *me = unsmob_grob (smob);
330 Link_array<Grob> column_arr=
331 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
334 for (int i = column_arr.size(); i--;)
336 Grob * s =Note_column::stem_l (column_arr[i]);
337 Grob * b = s ? Stem::beam_l (s): 0;
339 me->add_dependency (b);
341 return SCM_UNDEFINED;
344 MAKE_SCHEME_CALLBACK (Tuplet_bracket,after_line_breaking,1);
347 Tuplet_bracket::after_line_breaking (SCM smob)
349 Grob * me = unsmob_grob (smob);
350 Link_array<Grob> column_arr=
351 Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns");
353 if (!column_arr.size ())
356 return SCM_UNSPECIFIED;
358 if (dynamic_cast<Spanner*> (me)->broken_b ())
360 me->warning ( "Tuplet_bracket was across linebreak. Farewell cruel world.");
362 return SCM_UNSPECIFIED;
365 Direction dir = Directional_element_interface::get (me);
368 dir = Tuplet_bracket::get_default_dir (me);
369 Directional_element_interface::set (me, dir);
372 bool equally_long = false;
373 Grob * par_beam = parallel_beam (me, column_arr, &equally_long);
378 calc_position_and_height (me,&offset,&dy);
382 SCM ps = par_beam->get_grob_property ("positions");
384 Real lp = gh_scm2double (gh_car (ps));
385 Real rp = gh_scm2double (gh_cdr (ps));
390 offset = lp + dir * (0.5 + gh_scm2double (me->get_grob_property ("padding")));
395 SCM lp = me->get_grob_property ("left-position");
396 SCM rp = me->get_grob_property ("right-position");
398 if (gh_number_p (lp) && !gh_number_p (rp))
400 rp = gh_double2scm (gh_scm2double (lp) + dy);
402 else if (gh_number_p (rp) && !gh_number_p (lp))
404 lp = gh_double2scm (gh_scm2double (rp) - dy);
406 else if (!gh_number_p (rp) && !gh_number_p (lp))
408 lp = gh_double2scm (offset);
409 rp = gh_double2scm (offset +dy);
412 me->set_grob_property ("left-position", lp);
413 me->set_grob_property ("right-position", rp);
415 return SCM_UNSPECIFIED;
423 Tuplet_bracket::get_default_dir (Grob*me)
426 for (SCM s = me->get_grob_property ("note-columns"); gh_pair_p (s); s = ly_cdr (s))
428 Grob * nc = unsmob_grob (ly_car (s));
429 if (Note_column::dir (nc) < 0)
439 Tuplet_bracket::add_column (Grob*me, Item*n)
441 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n);
442 me->add_dependency (n);
444 add_bound_item (dynamic_cast<Spanner*> (me), n);
449 Tuplet_bracket::has_interface (Grob*me)
451 return me->has_interface (ly_symbol2scm ("tuplet-bracket-interface"));
457 ADD_INTERFACE (Tuplet_bracket,"tuplet-bracket-interface",
458 "A bracket with a number in the middle, used for tuplets.",
459 "note-columns padding gap left-position right-position bracket-visibility number-visibility thickness direction");