2 tie.cc -- implement Tie
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
15 #include "output-def.hh"
16 #include "rhythmic-head.hh"
18 #include "paper-column.hh"
20 #include "staff-symbol-referencer.hh"
21 #include "directional-element-interface.hh"
24 #include "note-head.hh"
25 #include "tie-column.hh"
28 tie: Connect two noteheads.
32 c4 ~ \clef bass ; c4 or
36 do we have non-horizontal ties then?
40 Tie::set_head (Grob *me, Direction d, Grob *h)
42 dynamic_cast<Spanner *> (me)->set_bound (d, h);
43 me->add_dependency (h);
47 Tie::head (Grob *me, Direction d)
49 Item *it = dynamic_cast<Spanner*> (me)->get_bound (d);
50 if (Note_head::has_interface (it))
57 Tie::get_column_rank (Grob *me, Direction d)
59 Spanner *span = dynamic_cast<Spanner *> (me);
60 Grob *h = head (me, d);
62 h = span->get_bound (d);
64 Grob *col = dynamic_cast<Item *> (h)->get_column ();
65 return Paper_column::get_rank (col);
69 Tie::get_position (Grob *me)
71 Direction d = head (me, LEFT) ? LEFT : RIGHT;
72 return (int) Staff_symbol_referencer::get_position (head (me, d));
76 Default: Put the tie oppositie of the stem [Wanske p231]
78 In case of chords: Tie_column takes over
80 The direction of the Tie is more complicated (See [Ross] p136 and
83 (what about linebreaks? )
86 Tie::get_default_dir (Grob *me)
88 Item *sl = head (me, LEFT) ? Rhythmic_head::get_stem (head (me, LEFT)) : 0;
89 Item *sr = head (me, RIGHT) ? Rhythmic_head::get_stem (head (me, RIGHT)) : 0;
92 if (get_grob_direction (sl) == UP
93 && get_grob_direction (sr) == UP)
98 Item *s = sl ? sl : sr;
99 return -get_grob_direction (s);
106 Tie::set_direction (Grob *me)
108 if (!get_grob_direction (me))
110 if (Tie_column::has_interface (me->get_parent (Y_AXIS)))
111 Tie_column::set_directions (me->get_parent (Y_AXIS));
113 set_grob_direction (me, Tie::get_default_dir (me));
118 Tie::get_default_attachments (Spanner *me, Grob *common, Real gap,
123 Real staff_space = Staff_symbol_referencer::staff_space (me);
124 Direction dir = get_grob_direction (me);
125 Interval attachments;
130 = robust_relative_extent (me->get_bound (d),
135 while (flip (&d) != LEFT);
137 if (attachments.length () < 0.6 * staff_space)
140 Let short ties start over note heads, instead of between.
142 Drul_array<bool> allow (true, true);
146 if (Note_head::has_interface (me->get_bound (d)))
148 Grob *stem = unsmob_grob (me->get_bound (d)->get_object ("stem"));
149 if (get_grob_direction (stem) == dir
153 } while (flip (&d) != LEFT);
155 if (allow[LEFT] && allow[RIGHT])
157 *staff_position += dir;
160 if (Note_head::has_interface (me->get_bound (d)))
163 = robust_relative_extent (me->get_bound (d),
166 attachments[d] = extent.linear_combination (- 0.5 * d);
170 while (flip (&d) != LEFT);
178 get_skyline_attachment (Drul_array< Array < Skyline_entry > > const &skylines,
181 Interval attachments;
185 attachments[d] = skyline_height (skylines[d], y, -d);
187 while (flip (&d) != LEFT);
193 Tie::get_configuration (Grob *me_grob, Grob *common,
194 Tie_configuration *conf,
195 Drul_array< Array < Skyline_entry > > const *skylines,
196 Tie_details const &details
199 Spanner *me = dynamic_cast<Spanner*> (me_grob);
200 if (!head (me, LEFT) && !head (me, RIGHT))
202 programming_error ("tie without heads");
208 UGH. Don't mirror Tie_configuration.
210 Direction dir = CENTER;
212 int tie_position = (int) Tie::get_position (me);
213 int staff_position = (int) conf->position_;
221 dir = get_grob_direction (me);
223 dir = get_default_dir (me);
226 Real staff_space = details.staff_space_;
228 bool in_between = true;
229 Interval attachments = conf->attachment_x_;
230 Real gap = robust_scm2double (me->get_property ("x-gap"), 0.2);
231 if (attachments.is_empty())
234 attachments = get_default_attachments (me, common, gap,
239 Real y = staff_space * 0.5 * staff_position;
240 attachments = get_skyline_attachment (*skylines, y);
241 attachments.widen (-gap);
245 Bezier b = slur_shape (attachments.length(),
246 details.height_limit_,
250 Offset middle = b.curve_point (0.5);
251 Offset edge = b.curve_point (0.0);
253 staff_position = int (rint (staff_position));
255 Real dy = fabs (middle[Y_AXIS] - edge[Y_AXIS]);
256 bool in_space = !(Staff_symbol_referencer::on_staffline (me, (int) staff_position));
258 (dy < 0.6 * staff_space);
263 Grob *left_dot = unsmob_grob (me->get_bound (LEFT)->get_object ("dot"));
264 int dot_pos = int (Staff_symbol_referencer::get_position (left_dot));
266 && (staff_position == dot_pos
267 || staff_position + dir == dot_pos))
269 staff_position += dir;
270 in_space = !in_space;
274 Real y = staff_space * 0.5 * staff_position;
275 attachments = get_skyline_attachment (*skylines, y);
276 attachments.widen (-gap);
277 Bezier b = slur_shape (attachments.length(),
278 details.height_limit_,
280 Offset middle = b.curve_point (0.5);
281 Offset edge = b.curve_point (0.0);
282 dy = fabs (middle[Y_AXIS] - edge[Y_AXIS]);
284 (dy < 0.6 * staff_space);
291 Grob *left_stem = unsmob_grob (me->get_bound (LEFT)->get_object ("stem"));
294 Stencil flag = Stem::get_translated_flag (left_stem);
295 Real y = staff_position * staff_space * 0.5;
296 if (flag.extent (Y_AXIS).contains (y))
298 staff_position += dir;
299 in_space = !in_space;
303 if (in_space != fits_in_space)
307 staff_position += dir;
312 staff_position += dir;
320 Real y = staff_space * 0.5 * staff_position;
321 attachments = get_skyline_attachment (*skylines, y);
322 attachments.widen (-gap);
324 Bezier b = slur_shape (attachments.length(),
325 details.height_limit_,
327 Offset middle = b.curve_point (0.5);
328 Offset edge = b.curve_point (0.0);
329 dy = fabs (middle[Y_AXIS] - edge[Y_AXIS]);
331 (dy < 0.6 * staff_space);
337 Putting larger in-space ties next to the notes forces
338 the edges to be opposite (Y-wise) to the tie direction.
340 if (staff_position == tie_position
342 && Staff_symbol_referencer::staff_radius (me) > fabs (staff_position) / 2
343 && dy > 0.3 * staff_space)
345 staff_position += 2 * dir;
350 && fabs (staff_position - tie_position) <= 1)
351 staff_position += 2*dir;
355 conf->position_ = staff_position;
358 if ((fabs (staff_position - tie_position) <= 1
359 && fabs (dy) < 0.45 * staff_space)
360 || fabs (dy) < 0.6 * staff_space)
363 vertically center in space.
366 conf->position_ = staff_position;
367 conf->attachment_x_ = attachments;
368 conf->center_tie_vertically (details);
373 dir * staff_space * (- 0.3);
378 Real where = 0.5 * dir;
380 Real rounding_dy = (where - middle[Y_AXIS]);
381 conf->delta_y_ = rounding_dy;
383 if (dir * (b.curve_point (0.0)[Y_AXIS]
384 + conf->position_ * staff_space * 0.5
386 dir * tie_position * 0.5 * staff_space)
388 if (Staff_symbol_referencer::staff_radius (me) > fabs (tie_position) / 2)
389 conf->position_ += 2 * dir;
391 conf->position_ += dir;
398 Real half_space = 0.5 * staff_space;
399 Real y = staff_position * half_space;
401 attachments = get_skyline_attachment (*skylines, y);
403 attachments.widen (-gap);
405 conf->attachment_x_ = attachments;
410 Tie::set_default_control_points (Grob *me_grob)
412 Spanner *me = dynamic_cast<Spanner*> (me_grob);
414 common = me->get_bound (LEFT)->common_refpoint (common, X_AXIS);
415 common = me->get_bound (RIGHT)->common_refpoint (common, X_AXIS);
417 Tie_configuration conf;
418 if (!get_grob_direction (me))
419 set_grob_direction (me, get_default_dir (me));
421 int tie_position = (int) Tie::get_position (me);
422 conf.position_ = tie_position;
426 get_configuration (me, common, &conf, 0, details);
427 set_control_points (me, common, conf, details);
431 Tie::set_control_points (Grob *me,
433 Tie_configuration const &conf,
434 Tie_details const &details
437 Bezier b = conf.get_bezier (details);
438 b.scale (1, conf.dir_);
439 b.translate (Offset (conf.attachment_x_[LEFT]
440 - me->relative_coordinate (common, X_AXIS),
441 0.5 * conf.position_ * details.staff_space_
445 SCM controls = SCM_EOL;
446 for (int i = 4; i--;)
448 if (!b.control_[i].is_sane ())
449 programming_error ("Insane offset");
450 controls = scm_cons (ly_offset2scm (b.control_[i]), controls);
452 me->set_property ("control-points", controls);
457 MAKE_SCHEME_CALLBACK (Tie, print, 1);
459 Tie::print (SCM smob)
461 Grob *me = unsmob_grob (smob);
463 if (CENTER == get_grob_direction (me))
466 if (!get_grob_direction (me))
467 me->programming_error ("Tie direction not set.");
469 SCM cp = me->get_property ("control-points");
470 if (!scm_is_pair (cp))
473 UGH. dependency tracking!
475 if (Tie_column::has_interface (me->get_parent (Y_AXIS)))
477 Tie_column::set_directions (me->get_parent (Y_AXIS));
480 cp = me->get_property ("control-points");
483 if (!scm_is_pair (cp))
485 set_default_control_points (me);
486 cp = me->get_property ("control-points");
489 if (!scm_is_pair (cp))
490 return Stencil ().smobbed_copy ();
492 Real staff_thick = Staff_symbol_referencer::line_thickness (me);
493 Real base_thick = robust_scm2double (me->get_property ("thickness"), 1);
494 Real thick = base_thick * staff_thick;
498 for (SCM s = cp; s != SCM_EOL; s = scm_cdr (s))
500 b.control_[i] = ly_scm2offset (scm_car (s));
506 SCM p = me->get_property ("dash-period");
507 SCM f = me->get_property ("dash-fraction");
508 if (scm_is_number (p) && scm_is_number (f))
509 a = Lookup::dashed_slur (b,
511 robust_scm2double (p, 1.0),
512 robust_scm2double (f, 0));
515 get_grob_direction (me) * staff_thick,
518 return a.smobbed_copy ();
524 "A tie connecting two noteheads.\n",