2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2002--2012 Juergen Reuter <reuter@ipd.uka.de>,
5 Pal Benko <benkop@freestart.hu>
7 LilyPond is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 LilyPond is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
21 #include "coherent-ligature-engraver.hh"
22 #include "font-interface.hh"
23 #include "international.hh"
24 #include "mensural-ligature.hh"
25 #include "note-column.hh"
26 #include "note-head.hh"
27 #include "output-def.hh"
28 #include "paper-column.hh"
30 #include "rhythmic-head.hh"
32 #include "staff-symbol-referencer.hh"
33 #include "stream-event.hh"
36 #include "translator.icc"
39 * TODO: accidentals are aligned with the first note;
40 * they must appear ahead.
42 * TODO: prohibit ligatures having notes differing only in accidentals
43 * (like \[ a\breve g as \])
45 * TODO: do something with multiple voices within a ligature. See
47 * Ockeghem: Missa Ecce ancilla domini, bassus part, end of Christe.
49 * TODO: enhance robustness: in case of an invalid ligature (e.g. the
50 * input specifies a ligature that contains a minima), automatically
51 * break the ligature into smaller, valid pieces. Such a piece may be
55 class Mensural_ligature_engraver : public Coherent_ligature_engraver
59 virtual Spanner *create_ligature_spanner ();
60 virtual void build_ligature (Spanner *ligature,
61 vector<Grob_info> const &primitives);
62 DECLARE_TRANSLATOR_LISTENER (ligature);
65 TRANSLATOR_DECLARATIONS (Mensural_ligature_engraver);
68 void transform_heads (vector<Grob_info> const &primitives);
69 void propagate_properties (Spanner *ligature,
70 vector<Grob_info> const &primitives);
71 void fold_up_primitives (vector<Grob_info> const &primitives);
74 IMPLEMENT_TRANSLATOR_LISTENER (Mensural_ligature_engraver, ligature);
76 Mensural_ligature_engraver::listen_ligature (Stream_event *ev)
78 Ligature_engraver::listen_ligature (ev);
81 Mensural_ligature_engraver::Mensural_ligature_engraver ()
83 brew_ligature_primitive_proc
84 = Mensural_ligature::brew_ligature_primitive_proc;
88 Mensural_ligature_engraver::create_ligature_spanner ()
90 return make_spanner ("MensuralLigature", SCM_EOL);
94 Mensural_ligature_engraver::transform_heads (vector<Grob_info> const &primitives)
96 if (primitives.size () < 2)
98 warning (_ ("ligature with less than 2 heads -> skipping"));
102 bool at_beginning = true;
104 // needed so that we can check whether
105 // the previous note can be turned into a flexa
106 bool prev_brevis_shape = false;
108 bool prev_semibrevis = false;
109 Item *prev_primitive = NULL;
111 for (vsize i = 0, s = primitives.size (); i < s; i++)
113 Grob_info info = primitives[i];
114 Item *primitive = dynamic_cast<Item *> (info.grob ());
115 int duration_log = Rhythmic_head::duration_log (primitive);
117 Stream_event *nr = info.event_cause ();
120 ugh. why not simply check for pitch?
122 if (!nr->in_event_class ("note-event"))
124 nr->origin ()->warning
125 (_ ("cannot determine pitch of ligature primitive -> skipping"));
130 int pitch = unsmob_pitch (nr->get_property ("pitch"))->steps ();
137 // we can get here after invalid input
138 nr->origin ()->warning
139 (_ ("single note ligature - skipping"));
142 prev_semibrevis = prev_brevis_shape = false;
143 prev_primitive = NULL;
147 if (pitch == prev_pitch)
149 nr->origin ()->warning
150 (_ ("prime interval within ligature -> skipping"));
157 if (duration_log < -3 // is this possible at all???
160 nr->origin ()->warning
161 (_ ("mensural ligature: duration none of Mx, L, B, S -> skipping"));
167 bool general_case = true;
168 bool make_flexa = false;
169 bool allow_flexa = true;
171 // first check special cases
176 if (duration_log == 0)
178 prim = MLP_UP | MLP_BREVIS;
179 general_case = false;
181 // b. descendens longa or brevis
183 && (unsmob_pitch (primitives[i + 1].event_cause ()
184 ->get_property ("pitch"))->steps () < pitch)
185 && duration_log > -3)
187 int left_stem = duration_log == -1 ? MLP_DOWN : 0;
188 prim = left_stem | MLP_BREVIS;
189 general_case = false;
192 // 2. initial semibrevis must be followed by another one
193 else if (prev_semibrevis)
195 prev_semibrevis = false;
196 if (duration_log == 0)
199 general_case = false;
203 nr->origin ()->warning
204 (_ ("semibrevis must be followed by another one -> skipping"));
210 // 3. semibreves are otherwise not allowed
211 else if (duration_log == 0)
213 nr->origin ()->warning
214 (_ ("semibreves can only appear at the beginning of a ligature,\n"
215 "and there may be only zero or two of them"));
220 // 4. end, descendens
221 else if (i == s - 1 && pitch < prev_pitch)
223 // brevis; previous note must be turned into flexa
224 if (duration_log == -1)
226 if (prev_brevis_shape)
229 general_case = false;
233 nr->origin ()->warning
234 (_ ("invalid ligatura ending:\n"
235 "when the last note is a descending brevis,\n"
236 "the penultimate note must be another one,\n"
237 "or the ligatura must be LB or SSB"));
243 else if (duration_log == -2)
246 general_case = allow_flexa = false;
248 // else maxima; fall through to regular case below
252 && to_boolean (primitive->get_property ("ligature-flexa")))
255 flexa requested, check whether allowed:
256 - there should be a previous note
257 - both of the notes must be of brevis shape
258 (i.e. can't be maxima or flexa;
259 longa is forbidden as well - it's nonexistent anyway)
260 - no compulsory flexa for the next note,
261 i.e. it's not an ultimate descending breve
263 make_flexa = !at_beginning && prev_brevis_shape && duration_log > -2;
264 if (make_flexa && i == s - 2)
267 check last condition: look ahead to next note
269 Grob_info next_info = primitives[i + 1];
270 Item *next_primitive = dynamic_cast<Item *> (next_info.grob ());
271 if (Rhythmic_head::duration_log (next_primitive) == -1)
274 breve: check whether descending
276 int const next_pitch = unsmob_pitch
277 (next_info.event_cause ()->get_property ("pitch"))->steps ();
278 if (next_pitch < pitch)
289 static int const shape[3] = {MLP_MAXIMA, MLP_LONGA, MLP_BREVIS};
291 prim = shape[duration_log + 3];
297 turn the note with the previous one into a flexa
299 prev_primitive->set_property
303 | (scm_to_int (prev_primitive->get_property ("primitive"))
305 prev_primitive->set_property
306 ("flexa-interval", scm_from_int (pitch - prev_pitch));
307 prim = MLP_FLEXA_END;
308 primitive->set_property
309 ("flexa-interval", scm_from_int (pitch - prev_pitch));
312 // join_primitives replacement
313 if (!(at_beginning || make_flexa))
314 prev_primitive->set_property ("add-join", ly_bool2scm (true));
316 at_beginning = false;
317 prev_primitive = primitive;
319 primitive->set_property ("primitive", scm_from_int (prim));
320 prev_brevis_shape = (prim & MLP_BREVIS) != 0;
321 prev_semibrevis = (prim & MLP_UP) != 0;
326 * A MensuralLigature grob consists of a bunch of NoteHead grobs that
327 * are glued together. It (a) does not make sense to change
328 * properties like thickness or flexa-width from one head to the next
329 * within a ligature (this would totally screw up alignment), and (b)
330 * some of these properties (like flexa-width) are specific to
331 * e.g. the MensuralLigature (as in contrast to e.g. LigatureBracket),
332 * and therefore should not be handled in the NoteHead code (which is
333 * also used by LigatureBracket). Therefore, we let the user control
334 * these properties via the concrete Ligature grob (like
335 * MensuralLigature) and then copy these properties as necessary to
336 * each of the NoteHead grobs. This is what
337 * propagate_properties () does.
340 Mensural_ligature_engraver::propagate_properties (Spanner *ligature,
341 vector<Grob_info> const &primitives)
344 = robust_scm2double (ligature->get_property ("thickness"), 1.3);
346 *= ligature->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
349 = Font_interface::get_default_font (ligature)->
350 find_by_name ("noteheads.sM1mensural").extent (X_AXIS).length ();
351 Real maxima_head_width
352 = Font_interface::get_default_font (ligature)->
353 find_by_name ("noteheads.sM3ligmensural").extent (X_AXIS).length ();
355 Item *prev_primitive = NULL;
356 for (vsize i = 0; i < primitives.size (); i++)
358 Item *primitive = dynamic_cast<Item *> (primitives[i].grob ());
359 int output = scm_to_int (primitive->get_property ("primitive"));
360 primitive->set_property ("thickness",
361 scm_from_double (thickness));
363 switch (output & MLP_ANY)
367 primitive->set_property ("head-width", scm_from_double (head_width));
370 primitive->set_property ("head-width",
371 scm_from_double (maxima_head_width));
373 case MLP_FLEXA_BEGIN:
375 the next note (should be MLP_FLEXA_END) will handle this one
380 SCM flexa_scm = primitive->get_property ("flexa-width");
381 Real const flexa_width = robust_scm2double (flexa_scm, 2.0);
382 SCM head_width = scm_from_double (0.5 * (flexa_width + thickness));
383 primitive->set_property ("head-width", head_width);
384 prev_primitive->set_property ("head-width", head_width);
385 prev_primitive->set_property ("flexa-width", flexa_scm);
389 programming_error (_ ("unexpected case fall-through"));
393 prev_primitive = primitive;
398 Mensural_ligature_engraver::fold_up_primitives (vector<Grob_info> const &primitives)
402 Real staff_space = 0.0;
403 Real thickness = 0.0;
405 for (vsize i = 0; i < primitives.size (); i++)
407 Item *current = dynamic_cast<Item *> (primitives[i].grob ());
411 staff_space = Staff_symbol_referencer::staff_space (first);
412 thickness = scm_to_double (current->get_property ("thickness"));
415 move_related_items_to_column (current, first->get_column (),
418 Real head_width = scm_to_double (current->get_property ("head-width"));
419 distance += head_width - thickness;
421 if (Rhythmic_head::dot_count (current) > 0)
423 Move dots above/behind the ligature.
424 dots should also avoid staff lines.
427 Grob *dot_gr = Rhythmic_head::get_dots (current);
429 bool const on_line = Staff_symbol_referencer::on_line
431 robust_scm2int (current->get_property ("staff-position"), 0));
432 Real vert_shift = on_line ? staff_space * 0.5 : 0.0;
433 bool const flexa_begin
434 = scm_to_int (current->get_property ("primitive"))
437 if (i + 1 < primitives.size ())
439 dot in the midst => avoid next note;
440 what to avoid and where depends on
441 being on a line or between lines
445 = scm_to_int (current->get_property ("delta-position"));
447 vert_shift += delta < 0
448 ? staff_space : (on_line ? -2.0 : -1.0) * staff_space;
451 if (0 < delta && delta < 3)
452 vert_shift -= staff_space;
454 else if (delta == 1 || delta == -1)
455 vert_shift -= delta * staff_space;
458 dot_gr->translate_axis (vert_shift, Y_AXIS);
461 move all dots behind head
463 dot_gr->translate_axis
464 ((flexa_begin ? staff_space * 0.6 : head_width) - 2.0 * thickness, X_AXIS);
470 Mensural_ligature_engraver::build_ligature (Spanner *ligature,
471 vector<Grob_info> const &primitives)
473 transform_heads (primitives);
474 propagate_properties (ligature, primitives);
475 fold_up_primitives (primitives);
478 ADD_ACKNOWLEDGER (Mensural_ligature_engraver, rest);
479 ADD_ACKNOWLEDGER (Mensural_ligature_engraver, ligature_head);
481 ADD_TRANSLATOR (Mensural_ligature_engraver,
483 "Handle @code{Mensural_ligature_events} by glueing special"
484 " ligature heads together.",