2 plet-spanner.cc -- implement Tuplet_bracket
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 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-spanner.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"
30 staff-line collisions for horizontal tuplet brackets.
36 Tuplet_bracket::set_interface (Grob*me)
38 me->set_interface (ly_symbol2scm ("tuplet-bracket"));
42 TODO: use stem->beam fields to find Beams. Autobeams aren't found
43 through the engraver mechanism. */
44 MAKE_SCHEME_CALLBACK (Tuplet_bracket,brew_molecule,1);
46 Tuplet_bracket::brew_molecule (SCM smob)
48 Grob *me= unsmob_grob (smob);
50 Link_array<Grob> column_arr=
51 Pointer_group_interface__extract_elements (me, (Grob*)0, "columns");
54 if (!column_arr.size ())
55 return mol.smobbed_copy ();
58 Grob *b1 = Note_column::stem_l (column_arr[0]);
59 Grob *b2 = Note_column::stem_l (column_arr.top());
61 b1 = b1 ? Stem::beam_l (b1) : 0;
62 b2 = b2 ? Stem::beam_l (b2) : 0;
65 Spanner*sp = dynamic_cast<Spanner*> (me);
67 // Default behaviour: number always, bracket when no beam!
68 bool par_beam = b1 && (b1 == b2) && !sp->broken_b() ;
70 bool bracket_visibility = !par_beam;
71 bool number_visibility = true;
73 SCM bracket = me->get_grob_property ("tuplet-bracket-visibility");
74 if (gh_boolean_p (bracket))
76 bracket_visibility = gh_scm2bool (bracket);
78 else if (bracket == ly_symbol2scm ("if-no-beam"))
79 bracket_visibility = !par_beam;
81 SCM numb = me->get_grob_property ("tuplet-number-visibility");
82 if (gh_boolean_p (numb))
84 number_visibility = gh_scm2bool (numb);
86 else if (numb == ly_symbol2scm ("if-no-beam"))
87 number_visibility = !par_beam;
90 Real ncw = column_arr.top ()->extent (column_arr.top (), X_AXIS).length ();
91 Real w = sp->spanner_length () + ncw;
93 Direction dir = Directional_element_interface::get (me);
94 Real dy = gh_scm2double (me->get_grob_property ("delta-y"));
95 SCM number = me->get_grob_property ("text");
96 if (gh_string_p (number) && number_visibility)
98 SCM properties = Font_interface::font_alist_chain (me);
99 Molecule num = Text_item::text2molecule (me, number, properties);
100 num.align_to (X_AXIS, CENTER);
101 num.translate_axis (w/2, X_AXIS);
102 num.align_to (Y_AXIS, CENTER);
104 num.translate_axis (dy/2, Y_AXIS);
106 mol.add_molecule (num);
109 if (bracket_visibility)
111 Real lt = me->paper_l ()->get_var ("stafflinethickness");
113 SCM thick = me->get_grob_property ("thick");
114 SCM gap = me->get_grob_property ("number-gap");
116 SCM at =scm_list_n (ly_symbol2scm ("tuplet"),
121 gh_double2scm (gh_scm2double (thick)* lt),
126 mol.add_molecule (Molecule (b, at));
129 return mol.smobbed_copy ();
136 use first -> last note for slope, and then correct for disturbing
139 Tuplet_bracket::calc_position_and_height (Grob*me,Real *offset, Real * dy)
141 Link_array<Grob> column_arr=
142 Pointer_group_interface__extract_elements (me, (Grob*)0, "columns");
145 Grob * commony = me->common_refpoint (me->get_grob_property ("columns"), Y_AXIS);
146 Grob * commonx = me->common_refpoint (me->get_grob_property ("columns"), X_AXIS);
148 Direction d = Directional_element_interface::get (me);
151 Use outer non-rest columns to determine slope
154 while (l <column_arr.size () && Note_column::rest_b (column_arr[l]))
157 int r = column_arr.size ()- 1;
158 while (r >= l && Note_column::rest_b (column_arr[r]))
163 *dy = column_arr[r]->extent (commony, Y_AXIS) [d]
164 - column_arr[l]->extent (commony, Y_AXIS) [d] ;
170 *offset = - d * infinity_f;
172 if (!column_arr.size ())
175 Real x0 = column_arr[0]->relative_coordinate (commonx, X_AXIS);
176 Real x1 = column_arr.top ()->relative_coordinate (commonx, X_AXIS);
178 Real factor = column_arr.size () > 1 ? 1/ (x1 - x0) : 1.0;
180 for (int i = 0; i < column_arr.size (); i++)
182 Real notey = column_arr[i]->extent (commony, Y_AXIS)[d]
183 - me->relative_coordinate (commony, Y_AXIS);
185 Real x = column_arr[i]->relative_coordinate (commonx, X_AXIS) - x0;
186 Real tuplety = *dy * x * factor;
188 if (notey * d > (*offset + tuplety) * d)
189 *offset = notey - tuplety;
197 horizontal brackets should not collide with staff lines.
203 // quantize, then do collision check.
204 Real ss= Staff_symbol_referencer::staff_space (me);
207 *offset = rint (*offset);
208 if (Staff_symbol_referencer::on_staffline (me, (int) rint (*offset)))
217 use first -> last note for slope,
220 Tuplet_bracket::calc_dy (Grob*me,Real * dy)
222 Link_array<Grob> column_arr=
223 Pointer_group_interface__extract_elements (me, (Grob*)0, "columns");
228 Direction d = Directional_element_interface::get (me);
229 *dy = column_arr.top ()->extent (column_arr.top (), Y_AXIS) [d]
230 - column_arr[0]->extent (column_arr[0], Y_AXIS) [d];
232 MAKE_SCHEME_CALLBACK (Tuplet_bracket,after_line_breaking,1);
235 Tuplet_bracket::after_line_breaking (SCM smob)
237 Grob * me = unsmob_grob (smob);
238 Link_array<Note_column> column_arr=
239 Pointer_group_interface__extract_elements (me, (Note_column*)0, "columns");
241 if (!column_arr.size ())
244 return SCM_UNSPECIFIED;
247 Direction d = Directional_element_interface::get (me);
250 d = Tuplet_bracket::get_default_dir (me);
251 Directional_element_interface::set (me, d);
256 calc_position_and_height (me,&offset,&dy);
258 if (!gh_number_p (me->get_grob_property ("delta-y")))
259 me->set_grob_property ("delta-y", gh_double2scm (dy));
261 me->translate_axis (offset, Y_AXIS);
262 return SCM_UNSPECIFIED;
267 Tuplet_bracket::get_default_dir (Grob*me)
270 SCM dir_sym =me->get_grob_property ("dir-forced");
271 if (isdir_b (dir_sym))
279 for (SCM s = me->get_grob_property ("columns"); gh_pair_p (s); s = ly_cdr (s))
281 Grob * nc = unsmob_grob (ly_car (s));
282 if (Note_column::dir (nc) < 0)
293 Tuplet_bracket::add_column (Grob*me, Item*n)
295 Pointer_group_interface::add_element (me, "columns",n);
296 me->add_dependency (n);
298 add_bound_item (dynamic_cast<Spanner*> (me), n);