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_;
29 Link_array<Grob> slurs_;
30 Link_array<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 (int i = slurs_.size (); i--;)
90 Slur::add_column (slurs_[i], e);
91 for (int 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_.is_empty ()
99 && end_slurs_.is_empty ())
102 Grob *e = info.grob ();
103 SCM avoid = e->get_property ("avoid-slur");
104 if (Tie::has_interface (e)
105 || avoid == ly_symbol2scm ("inside"))
107 for (int i = slurs_.size (); i--;)
108 Slur::add_extra_encompass (slurs_[i], e);
109 for (int i = end_slurs_.size (); i--;)
110 Slur::add_extra_encompass (end_slurs_[i], e);
112 else if (avoid == ly_symbol2scm ("outside")
113 || avoid == ly_symbol2scm ("around"))
115 Grob *slur = slurs_.size () ? slurs_[0] : 0;
116 slur = (end_slurs_.size () && !slur)
117 ? end_slurs_[0] : slur;
121 chain_offset_callback (e, Slur::outside_slur_callback_proc, Y_AXIS);
122 e->set_object ("slur", slur->self_scm ());
126 e->warning ("Ignoring grob for slur. avoid-slur not set?");
130 Slur_engraver::acknowledge_accidental (Grob_info info)
132 acknowledge_extra_object (info);
136 Slur_engraver::acknowledge_dynamic_line_spanner (Grob_info info)
138 acknowledge_extra_object (info);
142 Slur_engraver::acknowledge_fingering (Grob_info info)
144 acknowledge_extra_object (info);
148 Slur_engraver::acknowledge_tuplet_number (Grob_info info)
150 acknowledge_extra_object (info);
155 Slur_engraver::acknowledge_script (Grob_info info)
157 acknowledge_extra_object (info);
161 Slur_engraver::acknowledge_text_script (Grob_info info)
163 // if (!info.grob ()->internal_has_interface (ly_symbol2scm ("DynamicText")))
164 acknowledge_extra_object (info);
168 Slur_engraver::acknowledge_tie (Grob_info info)
170 acknowledge_extra_object (info);
174 Slur_engraver::finalize ()
177 slurs_[0]->warning (_ ("unterminated slur"));
181 Slur_engraver::process_music ()
185 if (slurs_.size () == 0)
186 events_[STOP]->origin ()->warning (_ ("can't end slur"));
192 if (events_[START] && slurs_.is_empty ())
194 Music *ev = events_[START];
196 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
198 Grob *slur = make_spanner ("Slur", events_[START]->self_scm ());
199 Direction updown = to_dir (ev->get_property ("direction"));
200 if (updown && !double_slurs)
201 set_grob_direction (slur, updown);
207 set_grob_direction (slur, DOWN);
208 slur = make_spanner ("Slur", events_[START]->self_scm ());
209 set_grob_direction (slur, UP);
213 set_melisma (slurs_.size ());
217 Slur_engraver::stop_translation_timestep ()
220 events_[START] = events_[STOP] = 0;
223 #include "translator.icc"
225 ADD_ACKNOWLEDGER (Slur_engraver, accidental);
226 ADD_ACKNOWLEDGER (Slur_engraver, dynamic_line_spanner);
227 ADD_ACKNOWLEDGER (Slur_engraver, fingering);
228 ADD_ACKNOWLEDGER (Slur_engraver, note_column);
229 ADD_ACKNOWLEDGER (Slur_engraver, script);
230 ADD_ACKNOWLEDGER (Slur_engraver, text_script);
231 ADD_ACKNOWLEDGER (Slur_engraver, tie);
232 ADD_ACKNOWLEDGER (Slur_engraver, tuplet_number);
233 ADD_TRANSLATOR (Slur_engraver,
234 /* doc */ "Build slur grobs from slur events",
236 /* accept */ "slur-event",
237 /* read */ "slurMelismaBusy doubleSlurs",