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>
14 #include "font-interface.hh"
15 #include "molecule.hh"
16 #include "paper-column.hh"
17 #include "paper-def.hh"
18 #include "text-item.hh"
19 #include "tuplet-bracket.hh"
21 #include "note-column.hh"
22 #include "dimensions.hh"
23 #include "group-interface.hh"
24 #include "directional-element-interface.hh"
26 #include "staff-symbol-referencer.hh"
31 in the case that there is no bracket, but there is a (single) beam,
32 follow beam precisely for determining tuplet number location.
35 MAKE_SCHEME_CALLBACK (Tuplet_bracket,brew_molecule,1);
37 Tuplet_bracket::brew_molecule (SCM smob)
39 Grob *me= unsmob_grob (smob);
41 Link_array<Grob> column_arr=
42 Pointer_group_interface__extract_grobs (me, (Grob*)0, "columns");
45 if (!column_arr.size ())
46 return mol.smobbed_copy ();
49 Grob *b1 = Note_column::stem_l (column_arr[0]);
50 Grob *b2 = Note_column::stem_l (column_arr.top());
52 b1 = b1 ? Stem::beam_l (b1) : 0;
53 b2 = b2 ? Stem::beam_l (b2) : 0;
56 Spanner*sp = dynamic_cast<Spanner*> (me);
58 // Default behaviour: number always, bracket when no beam!
59 bool par_beam = b1 && (b1 == b2) && !sp->broken_b() ;
61 bool bracket_visibility = !par_beam;
62 bool number_visibility = true;
64 SCM bracket = me->get_grob_property ("tuplet-bracket-visibility");
65 if (gh_boolean_p (bracket))
67 bracket_visibility = gh_scm2bool (bracket);
69 else if (bracket == ly_symbol2scm ("if-no-beam"))
70 bracket_visibility = !par_beam;
72 SCM numb = me->get_grob_property ("tuplet-number-visibility");
73 if (gh_boolean_p (numb))
75 number_visibility = gh_scm2bool (numb);
77 else if (numb == ly_symbol2scm ("if-no-beam"))
78 number_visibility = !par_beam;
81 Real ncw = column_arr.top ()->extent (column_arr.top (), X_AXIS).length ();
82 Real w = sp->spanner_length () + ncw;
84 Direction dir = Directional_element_interface::get (me);
85 Real dy = gh_scm2double (me->get_grob_property ("delta-y"));
86 SCM number = me->get_grob_property ("text");
87 if (gh_string_p (number) && number_visibility)
89 SCM properties = Font_interface::font_alist_chain (me);
90 Molecule num = Text_item::text2molecule (me, number, properties);
91 num.align_to (X_AXIS, CENTER);
92 num.translate_axis (w/2, X_AXIS);
93 num.align_to (Y_AXIS, CENTER);
95 num.translate_axis (dy/2, Y_AXIS);
97 mol.add_molecule (num);
100 if (bracket_visibility)
102 Real lt = me->paper_l ()->get_var ("linethickness");
104 SCM thick = me->get_grob_property ("thick");
105 SCM gap = me->get_grob_property ("number-gap");
107 SCM at =scm_list_n (ly_symbol2scm ("tuplet"),
112 gh_double2scm (gh_scm2double (thick)* lt),
117 mol.add_molecule (Molecule (b, at));
120 return mol.smobbed_copy ();
127 use first -> last note for slope, and then correct for disturbing
130 Tuplet_bracket::calc_position_and_height (Grob*me,Real *offset, Real * dy)
132 Link_array<Grob> column_arr=
133 Pointer_group_interface__extract_grobs (me, (Grob*)0, "columns");
136 Grob * commony = me->common_refpoint (me->get_grob_property ("columns"), Y_AXIS);
137 Grob * commonx = me->common_refpoint (me->get_grob_property ("columns"), X_AXIS);
139 Direction d = Directional_element_interface::get (me);
142 Use outer non-rest columns to determine slope
145 while (l <column_arr.size () && Note_column::rest_b (column_arr[l]))
148 int r = column_arr.size ()- 1;
149 while (r >= l && Note_column::rest_b (column_arr[r]))
154 *dy = column_arr[r]->extent (commony, Y_AXIS) [d]
155 - column_arr[l]->extent (commony, Y_AXIS) [d] ;
161 *offset = - d * infinity_f;
163 if (!column_arr.size ())
166 Real x0 = column_arr[0]->relative_coordinate (commonx, X_AXIS);
167 Real x1 = column_arr.top ()->relative_coordinate (commonx, X_AXIS);
169 Real factor = column_arr.size () > 1 ? 1/ (x1 - x0) : 1.0;
171 for (int i = 0; i < column_arr.size (); i++)
173 Real notey = column_arr[i]->extent (commony, Y_AXIS)[d]
174 - me->relative_coordinate (commony, Y_AXIS);
176 Real x = column_arr[i]->relative_coordinate (commonx, X_AXIS) - x0;
177 Real tuplety = *dy * x * factor;
179 if (notey * d > (*offset + tuplety) * d)
180 *offset = notey - tuplety;
188 horizontal brackets should not collide with staff lines.
194 // quantize, then do collision check.
195 Real ss= Staff_symbol_referencer::staff_space (me);
198 *offset = rint (*offset);
199 if (Staff_symbol_referencer::on_staffline (me, (int) rint (*offset)))
208 use first -> last note for slope,
211 Tuplet_bracket::calc_dy (Grob*me,Real * dy)
213 Link_array<Grob> column_arr=
214 Pointer_group_interface__extract_grobs (me, (Grob*)0, "columns");
219 Direction d = Directional_element_interface::get (me);
220 *dy = column_arr.top ()->extent (column_arr.top (), Y_AXIS) [d]
221 - column_arr[0]->extent (column_arr[0], Y_AXIS) [d];
223 MAKE_SCHEME_CALLBACK (Tuplet_bracket,after_line_breaking,1);
226 Tuplet_bracket::after_line_breaking (SCM smob)
228 Grob * me = unsmob_grob (smob);
229 Link_array<Note_column> column_arr=
230 Pointer_group_interface__extract_grobs (me, (Note_column*)0, "columns");
232 if (!column_arr.size ())
235 return SCM_UNSPECIFIED;
238 Direction d = Directional_element_interface::get (me);
241 d = Tuplet_bracket::get_default_dir (me);
242 Directional_element_interface::set (me, d);
247 calc_position_and_height (me,&offset,&dy);
249 if (!gh_number_p (me->get_grob_property ("delta-y")))
250 me->set_grob_property ("delta-y", gh_double2scm (dy));
252 me->translate_axis (offset, Y_AXIS);
253 return SCM_UNSPECIFIED;
258 Tuplet_bracket::get_default_dir (Grob*me)
261 for (SCM s = me->get_grob_property ("columns"); gh_pair_p (s); s = ly_cdr (s))
263 Grob * nc = unsmob_grob (ly_car (s));
264 if (Note_column::dir (nc) < 0)
275 Tuplet_bracket::add_column (Grob*me, Item*n)
277 Pointer_group_interface::add_grob (me, ly_symbol2scm ("columns"), n);
278 me->add_dependency (n);
280 add_bound_item (dynamic_cast<Spanner*> (me), n);
285 Tuplet_bracket::has_interface (Grob*me)
287 return me->has_interface (ly_symbol2scm ("tuplet-bracket-interface"));
293 ADD_INTERFACE (Tuplet_bracket,"tuplet-bracket-interface",
294 "A bracket with a number in the middle, used for tuplets.",
295 "columns number-gap delta-y tuplet-bracket-visibility tuplet-number-visibility thick direction");