2 tie.cc -- implement Tie
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 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 Item *sl = head (me, LEFT) ? Rhythmic_head::get_stem (head (me, LEFT)) : 0;
100 Item *sr = head (me, RIGHT) ? Rhythmic_head::get_stem (head (me, RIGHT)) : 0;
103 if (get_grob_direction (sl) == UP
104 && get_grob_direction (sr) == UP)
109 Item *s = sl ? sl : sr;
110 return -get_grob_direction (s);
117 MAKE_SCHEME_CALLBACK(Tie, calc_direction, 1);
119 Tie::calc_direction (SCM smob)
121 Grob *me = unsmob_grob (smob);
122 Grob *yparent = me->get_parent (Y_AXIS);
123 if (Tie_column::has_interface (yparent)
124 && unsmob_grob_array (yparent->get_object ("ties"))
125 && unsmob_grob_array (yparent->get_object ("ties"))->size () > 1)
127 /* trigger positioning. */
128 (void) yparent->get_property ("positioning-done");
131 set_grob_direction (me, Tie::get_default_dir (me));
133 return SCM_UNSPECIFIED;
137 Tie::get_default_attachments (Spanner *me, Grob *common, Real gap,
140 Tie_details const &details
143 Real staff_space = Staff_symbol_referencer::staff_space (me);
144 Direction dir = get_grob_direction (me);
145 Interval attachments;
150 = robust_relative_extent (me->get_bound (d),
155 while (flip (&d) != LEFT);
157 if (attachments.length () < details.between_length_limit_ * staff_space)
160 Let short ties start over note heads, instead of between.
162 Drul_array<bool> allow (true, true);
166 if (Note_head::has_interface (me->get_bound (d)))
168 Grob *stem = unsmob_grob (me->get_bound (d)->get_object ("stem"));
169 if (get_grob_direction (stem) == dir
173 } while (flip (&d) != LEFT);
175 if (allow[LEFT] && allow[RIGHT])
177 *staff_position += dir;
180 if (Note_head::has_interface (me->get_bound (d)))
183 = robust_relative_extent (me->get_bound (d),
186 attachments[d] = extent.linear_combination (- 0.5 * d);
190 while (flip (&d) != LEFT);
198 Tie::set_default_control_points (Grob *me_grob)
200 Spanner *me = dynamic_cast<Spanner*> (me_grob);
202 common = me->get_bound (LEFT)->common_refpoint (common, X_AXIS);
203 common = me->get_bound (RIGHT)->common_refpoint (common, X_AXIS);
205 Tie_formatting_problem problem;
206 problem.from_tie (me);
208 // get_configuration (me, &conf, problem);
209 int tie_position = (int) Tie::get_position (me);
210 Tie_configuration conf
211 = problem.find_optimal_tie_configuration (tie_position, get_grob_direction (me));
212 set_control_points (me, problem.common_x_refpoint (),
213 conf, problem.details_);
217 Tie::set_control_points (Grob *me,
219 Tie_configuration const &conf,
220 Tie_details const &details
223 Bezier b = conf.get_transformed_bezier (details);
224 b.translate (Offset (- me->relative_coordinate (common, X_AXIS), 0));
226 SCM controls = SCM_EOL;
227 for (int i = 4; i--;)
229 if (!b.control_[i].is_sane ())
230 programming_error ("Insane offset");
231 controls = scm_cons (ly_offset2scm (b.control_[i]), controls);
233 me->set_property ("control-points", controls);
236 MAKE_SCHEME_CALLBACK(Tie, calc_control_points, 1);
238 Tie::calc_control_points (SCM smob)
240 Grob *me = unsmob_grob (smob);
242 // trigger Tie-column
243 (void) get_grob_direction (me);
245 Grob *yparent = me->get_parent (Y_AXIS);
246 if (Tie_column::has_interface (yparent)
247 && unsmob_grob_array (yparent->get_object ("ties"))
248 && unsmob_grob_array (yparent->get_object ("ties"))->size () > 1)
250 /* trigger positioning. */
251 (void) yparent->get_property ("positioning-done");
254 if (!scm_is_pair (me->get_property ("control-points")))
256 set_default_control_points (me);
259 return SCM_UNSPECIFIED;
263 MAKE_SCHEME_CALLBACK (Tie, print, 1);
265 Tie::print (SCM smob)
267 Grob *me = unsmob_grob (smob);
269 SCM cp = me->get_property ("control-points");
271 Real staff_thick = Staff_symbol_referencer::line_thickness (me);
272 Real base_thick = robust_scm2double (me->get_property ("thickness"), 1);
273 Real thick = base_thick * staff_thick;
277 for (SCM s = cp; s != SCM_EOL; s = scm_cdr (s))
279 b.control_[i] = ly_scm2offset (scm_car (s));
285 SCM p = me->get_property ("dash-period");
286 SCM f = me->get_property ("dash-fraction");
287 if (scm_is_number (p) && scm_is_number (f))
288 a = Lookup::dashed_slur (b,
290 robust_scm2double (p, 1.0),
291 robust_scm2double (f, 0));
294 get_grob_direction (me) * staff_thick,
297 return a.smobbed_copy ();
303 "A tie connecting two noteheads. \n\n"