2 slur-engraver.cc -- implement Slur_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
12 #include "directional-element-interface.hh"
13 #include "international.hh"
14 #include "note-column.hh"
21 It is possible that a slur starts and ends on the same note. At
22 least, it is for phrasing slurs: a note can be both beginning and
25 class Slur_engraver : public Engraver
27 Drul_array<Music *> events_;
28 Music *running_slur_start_;
30 vector<Grob*> end_slurs_;
32 void set_melisma (bool);
35 virtual bool try_music (Music *);
37 DECLARE_ACKNOWLEDGER (accidental);
38 DECLARE_ACKNOWLEDGER (dynamic_line_spanner);
39 DECLARE_ACKNOWLEDGER (fingering);
40 DECLARE_ACKNOWLEDGER (note_column);
41 DECLARE_ACKNOWLEDGER (script);
42 DECLARE_ACKNOWLEDGER (text_script);
43 DECLARE_ACKNOWLEDGER (tie);
44 DECLARE_ACKNOWLEDGER (tuplet_number);
45 void acknowledge_extra_object (Grob_info);
46 void stop_translation_timestep ();
47 virtual void finalize ();
48 void process_music ();
51 TRANSLATOR_DECLARATIONS (Slur_engraver);
54 Slur_engraver::Slur_engraver ()
56 events_[START] = events_[STOP] = 0;
60 Slur_engraver::try_music (Music *m)
62 if (m->is_mus_type ("slur-event"))
64 Direction d = to_dir (m->get_property ("span-direction"));
80 Slur_engraver::set_melisma (bool m)
82 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T : SCM_BOOL_F);
86 Slur_engraver::acknowledge_note_column (Grob_info info)
88 Grob *e = info.grob ();
89 for (vsize i = slurs_.size (); i--;)
90 Slur::add_column (slurs_[i], e);
91 for (vsize i = end_slurs_.size (); i--;)
92 Slur::add_column (end_slurs_[i], e);
96 Slur_engraver::acknowledge_extra_object (Grob_info info)
98 if (slurs_.empty () && end_slurs_.empty ())
101 Grob *e = info.grob ();
102 SCM avoid = e->get_property ("avoid-slur");
103 if (Tie::has_interface (e)
104 || avoid == ly_symbol2scm ("inside"))
106 for (vsize i = slurs_.size (); i--;)
107 Slur::add_extra_encompass (slurs_[i], e);
108 for (vsize i = end_slurs_.size (); i--;)
109 Slur::add_extra_encompass (end_slurs_[i], e);
111 else if (avoid == ly_symbol2scm ("outside")
112 || avoid == ly_symbol2scm ("around"))
114 Grob *slur = slurs_.size () ? slurs_[0] : 0;
115 slur = (end_slurs_.size () && !slur)
116 ? end_slurs_[0] : slur;
120 chain_offset_callback (e, Slur::outside_slur_callback_proc, Y_AXIS);
121 e->set_object ("slur", slur->self_scm ());
125 e->warning ("Ignoring grob for slur. avoid-slur not set?");
129 Slur_engraver::acknowledge_accidental (Grob_info info)
131 acknowledge_extra_object (info);
135 Slur_engraver::acknowledge_dynamic_line_spanner (Grob_info info)
137 acknowledge_extra_object (info);
141 Slur_engraver::acknowledge_fingering (Grob_info info)
143 acknowledge_extra_object (info);
147 Slur_engraver::acknowledge_tuplet_number (Grob_info info)
149 acknowledge_extra_object (info);
154 Slur_engraver::acknowledge_script (Grob_info info)
156 if (!info.grob ()->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
157 acknowledge_extra_object (info);
161 Slur_engraver::acknowledge_text_script (Grob_info info)
163 acknowledge_extra_object (info);
167 Slur_engraver::acknowledge_tie (Grob_info info)
169 acknowledge_extra_object (info);
173 Slur_engraver::finalize ()
176 slurs_[0]->warning (_ ("unterminated slur"));
180 Slur_engraver::process_music ()
184 if (slurs_.size () == 0)
185 events_[STOP]->origin ()->warning (_ ("can't end slur"));
191 if (events_[START] && slurs_.empty ())
193 Music *ev = events_[START];
195 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
197 Grob *slur = make_spanner ("Slur", events_[START]->self_scm ());
198 Direction updown = to_dir (ev->get_property ("direction"));
199 if (updown && !double_slurs)
200 set_grob_direction (slur, updown);
202 slurs_.push_back (slur);
206 set_grob_direction (slur, DOWN);
207 slur = make_spanner ("Slur", events_[START]->self_scm ());
208 set_grob_direction (slur, UP);
209 slurs_.push_back (slur);
212 set_melisma (slurs_.size ());
216 Slur_engraver::stop_translation_timestep ()
219 events_[START] = events_[STOP] = 0;
222 #include "translator.icc"
224 ADD_ACKNOWLEDGER (Slur_engraver, accidental);
225 ADD_ACKNOWLEDGER (Slur_engraver, dynamic_line_spanner);
226 ADD_ACKNOWLEDGER (Slur_engraver, fingering);
227 ADD_ACKNOWLEDGER (Slur_engraver, note_column);
228 ADD_ACKNOWLEDGER (Slur_engraver, script);
229 ADD_ACKNOWLEDGER (Slur_engraver, text_script);
230 ADD_ACKNOWLEDGER (Slur_engraver, tie);
231 ADD_ACKNOWLEDGER (Slur_engraver, tuplet_number);
232 ADD_TRANSLATOR (Slur_engraver,
233 /* doc */ "Build slur grobs from slur events",
235 /* accept */ "slur-event",
236 /* read */ "slurMelismaBusy doubleSlurs",