2 slur-engraver.cc -- implement Slur_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "note-column.hh"
12 #include "directional-element-interface.hh"
13 #include "engraver.hh"
19 It is possible that a slur starts and ends on the same note. At
20 least, it is for phrasing slurs: a note can be both beginning and
23 class Slur_engraver : public Engraver
25 Drul_array<Music *> events_;
26 Music *running_slur_start_;
27 Link_array<Grob> slurs_;
28 Link_array<Grob> end_slurs_;
30 void set_melisma (bool);
33 virtual bool try_music (Music *);
35 DECLARE_ACKNOWLEDGER (accidental);
36 DECLARE_ACKNOWLEDGER (dynamic_line_spanner);
37 DECLARE_ACKNOWLEDGER (fingering);
38 DECLARE_ACKNOWLEDGER (note_column);
39 DECLARE_ACKNOWLEDGER (script);
40 DECLARE_ACKNOWLEDGER (text_script);
41 DECLARE_ACKNOWLEDGER (tie);
42 void acknowledge_extra_object (Grob_info);
43 void stop_translation_timestep ();
44 virtual void finalize ();
45 void process_music ();
48 TRANSLATOR_DECLARATIONS (Slur_engraver);
51 Slur_engraver::Slur_engraver ()
53 events_[START] = events_[STOP] = 0;
57 Slur_engraver::try_music (Music *m)
59 if (m->is_mus_type ("slur-event"))
61 Direction d = to_dir (m->get_property ("span-direction"));
77 Slur_engraver::set_melisma (bool m)
79 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T : SCM_BOOL_F);
83 Slur_engraver::acknowledge_note_column (Grob_info info)
85 Grob *e = info.grob ();
86 for (int i = slurs_.size (); i--;)
87 Slur::add_column (slurs_[i], e);
88 for (int i = end_slurs_.size (); i--;)
89 Slur::add_column (end_slurs_[i], e);
93 Slur_engraver::acknowledge_extra_object (Grob_info info)
95 Grob *e = info.grob ();
96 SCM avoid = e->get_property ("avoid-slur");
97 if (Tie::has_interface (e)
98 || avoid == ly_symbol2scm ("inside"))
100 for (int i = slurs_.size (); i--;)
101 Slur::add_extra_encompass (slurs_[i], e);
102 for (int i = end_slurs_.size (); i--;)
103 Slur::add_extra_encompass (end_slurs_[i], e);
105 else if ((avoid == ly_symbol2scm ("outside")
106 || avoid == ly_symbol2scm ("around"))
107 && e->name () != "DynamicText")
109 Grob *slur = slurs_.size () ? slurs_[0] : 0;
110 slur = (end_slurs_.size () && !slur)
111 ? end_slurs_[0] : slur;
115 chain_offset_callback (e, Slur::outside_slur_callback_proc, Y_AXIS);
116 e->set_object ("slur", slur->self_scm ());
122 Slur_engraver::acknowledge_accidental (Grob_info info)
124 acknowledge_extra_object (info);
128 Slur_engraver::acknowledge_dynamic_line_spanner (Grob_info info)
130 acknowledge_extra_object (info);
134 Slur_engraver::acknowledge_fingering (Grob_info info)
136 acknowledge_extra_object (info);
140 Slur_engraver::acknowledge_script (Grob_info info)
142 acknowledge_extra_object (info);
146 Slur_engraver::acknowledge_text_script (Grob_info info)
148 acknowledge_extra_object (info);
152 Slur_engraver::acknowledge_tie (Grob_info info)
154 acknowledge_extra_object (info);
158 Slur_engraver::finalize ()
161 slurs_[0]->warning (_ ("unterminated slur"));
165 Slur_engraver::process_music ()
169 if (slurs_.size () == 0)
170 events_[STOP]->origin ()->warning (_ ("can't end slur"));
176 if (events_[START] && slurs_.is_empty ())
178 Music *ev = events_[START];
180 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
182 Grob *slur = make_spanner ("Slur", events_[START]->self_scm ());
183 Direction updown = to_dir (ev->get_property ("direction"));
184 if (updown && !double_slurs)
185 set_grob_direction (slur, updown);
191 set_grob_direction (slur, DOWN);
192 slur = make_spanner ("Slur", events_[START]->self_scm ());
193 set_grob_direction (slur, UP);
197 set_melisma (slurs_.size ());
201 Slur_engraver::stop_translation_timestep ()
204 events_[START] = events_[STOP] = 0;
207 #include "translator.icc"
209 ADD_ACKNOWLEDGER (Slur_engraver, accidental);
210 ADD_ACKNOWLEDGER (Slur_engraver, dynamic_line_spanner);
211 ADD_ACKNOWLEDGER (Slur_engraver, fingering);
212 ADD_ACKNOWLEDGER (Slur_engraver, note_column);
213 ADD_ACKNOWLEDGER (Slur_engraver, script);
214 ADD_ACKNOWLEDGER (Slur_engraver, text_script);
215 ADD_ACKNOWLEDGER (Slur_engraver, tie);
216 ADD_TRANSLATOR (Slur_engraver,
217 /* doc */ "Build slur grobs from slur events",
219 /* accept */ "slur-event",
220 /* read */ "slurMelismaBusy doubleSlurs",