2 tie.cc -- implement Tie
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
12 #include "output-def.hh"
13 #include "rhythmic-head.hh"
15 #include "paper-column.hh"
17 #include "staff-symbol-referencer.hh"
18 #include "directional-element-interface.hh"
21 #include "note-head.hh"
22 #include "tie-column.hh"
23 #include "grob-array.hh"
24 #include "tie-formatting-problem.hh"
25 #include "tie-configuration.hh"
29 Tie::compare (Grob *const &s1,
32 return sign (Tie::get_position (s1) - Tie::get_position (s2));
36 Tie::set_head (Grob *me, Direction d, Grob *h)
38 dynamic_cast<Spanner *> (me)->set_bound (d, h);
42 Tie::head (Grob *me, Direction d)
44 Item *it = dynamic_cast<Spanner*> (me)->get_bound (d);
45 if (Note_head::has_interface (it))
52 Tie::get_column_rank (Grob *me, Direction d)
54 Spanner *span = dynamic_cast<Spanner *> (me);
55 Grob *h = head (me, d);
57 h = span->get_bound (d);
59 Grob *col = dynamic_cast<Item *> (h)->get_column ();
60 return Paper_column::get_rank (col);
64 Tie::get_position (Grob *me)
69 Grob *h = head (me, d);
71 return (int) Staff_symbol_referencer::get_position (h);
73 while (flip (&d) != LEFT);
77 TODO: this is theoretically possible for ties across more than 2
78 systems.. We should look at the first broken copy.
81 programming_error ("Tie without heads. Suicide");
87 Default: Put the tie oppositie of the stem [Wanske p231]
89 In case of chords: Tie_column takes over
91 The direction of the Tie is more complicated (See [Ross] p136 and
94 (what about linebreaks? )
97 Tie::get_default_dir (Grob *me)
99 Drul_array<Grob*> stems;
103 Grob *stem = head (me, d) ? Rhythmic_head::get_stem (head (me, d)) : 0;
105 stem = Stem::is_invisible (stem) ? 0 : stem;
109 while (flip (&d)!= LEFT);
111 if (stems[LEFT] && stems[RIGHT])
113 if (get_grob_direction (stems[LEFT]) == UP
114 && get_grob_direction (stems[RIGHT]) == UP)
117 else if (stems[LEFT] || stems[RIGHT])
119 Grob *s = stems[LEFT] ? stems[LEFT] : stems[RIGHT];
120 return -get_grob_direction (s);
127 MAKE_SCHEME_CALLBACK(Tie, calc_direction, 1);
129 Tie::calc_direction (SCM smob)
131 Grob *me = unsmob_grob (smob);
132 Grob *yparent = me->get_parent (Y_AXIS);
133 if (Tie_column::has_interface (yparent)
134 && unsmob_grob_array (yparent->get_object ("ties"))
135 && unsmob_grob_array (yparent->get_object ("ties"))->size () > 1)
137 /* trigger positioning. */
138 (void) yparent->get_property ("positioning-done");
141 set_grob_direction (me, Tie::get_default_dir (me));
143 return SCM_UNSPECIFIED;
148 Tie::set_default_control_points (Grob *me_grob)
150 Spanner *me = dynamic_cast<Spanner*> (me_grob);
152 common = me->get_bound (LEFT)->common_refpoint (common, X_AXIS);
153 common = me->get_bound (RIGHT)->common_refpoint (common, X_AXIS);
155 Tie_formatting_problem problem;
156 problem.from_tie (me);
157 Tie_specification spec = problem.get_tie_specification (0);
158 spec.has_manual_dir_ = true;
159 spec.manual_dir_ = get_grob_direction (me);
161 Tie_configuration conf
162 = problem.find_optimal_tie_configuration (spec);
164 set_control_points (me, problem.common_x_refpoint (),
165 conf, problem.details_);
169 Tie::set_control_points (Grob *me,
171 Tie_configuration const &conf,
172 Tie_details const &details
175 Bezier b = conf.get_transformed_bezier (details);
176 b.translate (Offset (- me->relative_coordinate (common, X_AXIS), 0));
178 SCM controls = SCM_EOL;
179 for (int i = 4; i--;)
181 if (!b.control_[i].is_sane ())
182 programming_error ("Insane offset");
183 controls = scm_cons (ly_offset2scm (b.control_[i]), controls);
185 me->set_property ("control-points", controls);
188 MAKE_SCHEME_CALLBACK(Tie, calc_control_points, 1);
190 Tie::calc_control_points (SCM smob)
192 Grob *me = unsmob_grob (smob);
194 // trigger Tie-column
195 (void) get_grob_direction (me);
197 Grob *yparent = me->get_parent (Y_AXIS);
198 if (Tie_column::has_interface (yparent)
199 && unsmob_grob_array (yparent->get_object ("ties"))
200 && unsmob_grob_array (yparent->get_object ("ties"))->size () > 1)
202 /* trigger positioning. */
203 (void) yparent->get_property ("positioning-done");
206 if (!scm_is_pair (me->get_property ("control-points")))
208 set_default_control_points (me);
211 return SCM_UNSPECIFIED;
215 TODO: merge witnh Slur::print.
217 MAKE_SCHEME_CALLBACK (Tie, print, 1);
219 Tie::print (SCM smob)
221 Grob *me = unsmob_grob (smob);
223 SCM cp = me->get_property ("control-points");
225 Real staff_thick = Staff_symbol_referencer::line_thickness (me);
226 Real base_thick = staff_thick * robust_scm2double (me->get_property ("thickness"), 1);
227 Real line_thick = staff_thick * robust_scm2double (me->get_property ("line-thickness"), 1);
231 for (SCM s = cp; s != SCM_EOL; s = scm_cdr (s))
233 b.control_[i] = ly_scm2offset (scm_car (s));
239 SCM p = me->get_property ("dash-period");
240 SCM f = me->get_property ("dash-fraction");
241 if (scm_is_number (p) && scm_is_number (f))
242 a = Lookup::dashed_slur (b,
244 robust_scm2double (p, 1.0),
245 robust_scm2double (f, 0));
248 get_grob_direction (me) * base_thick,
251 return a.smobbed_copy ();
257 "A horizontal curve connecting two noteheads. \n\n"
262 "avoid-slur " // UGH.