2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 #include "note-column.hh"
10 #include "directional-element-interface.hh"
11 #include "engraver.hh"
16 It is possible that a slur starts and ends on the same note. At
17 least, it is for phrasing slurs: a note can be both beginning and
21 class Slur_engraver : public Engraver
23 Drul_array<Music *> events_;
24 Music *running_slur_start_;
25 Link_array<Grob> slurs_;
26 Link_array<Grob> end_slurs_;
28 void set_melisma (bool);
31 virtual bool try_music (Music *);
33 DECLARE_ACKNOWLEDGER(note_column);
34 DECLARE_ACKNOWLEDGER(accidental);
35 DECLARE_ACKNOWLEDGER(fingering);
36 DECLARE_ACKNOWLEDGER(script);
37 DECLARE_ACKNOWLEDGER(tie);
38 DECLARE_ACKNOWLEDGER(text_script);
39 void acknowledge_extra_object (Grob_info);
40 PRECOMPUTED_VIRTUAL void stop_translation_timestep ();
41 virtual void finalize ();
42 PRECOMPUTED_VIRTUAL void process_music ();
45 TRANSLATOR_DECLARATIONS (Slur_engraver);
48 Slur_engraver::Slur_engraver ()
50 events_[START] = events_[STOP] = 0;
54 Slur_engraver::try_music (Music *m)
56 if (m->is_mus_type ("slur-event"))
58 Direction d = to_dir (m->get_property ("span-direction"));
74 Slur_engraver::set_melisma (bool m)
76 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T : SCM_BOOL_F);
80 Slur_engraver::acknowledge_note_column (Grob_info info)
82 Grob *e = info.grob ();
83 for (int i = slurs_.size (); i--;)
84 Slur::add_column (slurs_[i], e);
85 for (int i = end_slurs_.size (); i--;)
86 Slur::add_column (end_slurs_[i], e);
90 Slur_engraver::acknowledge_extra_object (Grob_info info)
92 Grob*e = info.grob ();
93 SCM inside = e->get_property ("inside-slur");
94 if (Tie::has_interface (e)
95 || to_boolean (inside))
97 for (int i = slurs_.size (); i--;)
98 Slur::add_extra_encompass (slurs_[i], e);
99 for (int i = end_slurs_.size (); i--;)
100 Slur::add_extra_encompass (end_slurs_[i], e);
102 else if (inside == SCM_BOOL_F)
104 Grob *slur = slurs_.size () ? slurs_[0] : 0;
105 slur = (end_slurs_.size () && !slur)
106 ? end_slurs_[0] : slur;
110 e->add_offset_callback (Slur::outside_slur_callback_proc, Y_AXIS);
111 e->set_object ("slur", slur->self_scm ());
117 Slur_engraver::acknowledge_accidental (Grob_info info)
119 acknowledge_extra_object (info);
124 Slur_engraver::acknowledge_fingering (Grob_info info)
126 acknowledge_extra_object (info);
130 Slur_engraver::acknowledge_script (Grob_info info)
132 acknowledge_extra_object (info);
136 Slur_engraver::acknowledge_text_script (Grob_info info)
138 acknowledge_extra_object (info);
142 Slur_engraver::acknowledge_tie (Grob_info info)
144 acknowledge_extra_object (info);
151 Slur_engraver::finalize ()
154 slurs_[0]->warning (_ ("unterminated slur"));
158 Slur_engraver::process_music ()
162 if (slurs_.size () == 0)
163 events_[STOP]->origin ()->warning (_ ("can't end slur"));
169 if (events_[START] && slurs_.is_empty ())
171 Music *ev = events_[START];
173 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
175 Grob *slur = make_spanner ("Slur", events_[START]->self_scm ());
176 Direction updown = to_dir (ev->get_property ("direction"));
177 if (updown && !double_slurs)
178 set_grob_direction (slur, updown);
184 set_grob_direction (slur, DOWN);
185 slur = make_spanner ("Slur", events_[START]->self_scm ());
186 set_grob_direction (slur, UP);
190 set_melisma (slurs_.size ());
194 Slur_engraver::stop_translation_timestep ()
197 events_[START] = events_[STOP] = 0;
200 #include "translator.icc"
202 ADD_ACKNOWLEDGER(Slur_engraver,note_column);
203 ADD_ACKNOWLEDGER(Slur_engraver,accidental);
204 ADD_ACKNOWLEDGER(Slur_engraver,fingering)
205 ADD_ACKNOWLEDGER(Slur_engraver,script);
206 ADD_ACKNOWLEDGER(Slur_engraver,tie);
207 ADD_ACKNOWLEDGER(Slur_engraver,text_script);
208 ADD_TRANSLATOR (Slur_engraver,
209 /* descr */ "Build slurs grobs from slur events",
211 /* accepts */ "slur-event",
212 /* reads */ "slurMelismaBusy doubleSlurs",