2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2004 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*);
32 virtual void acknowledge_grob (Grob_info);
33 virtual void stop_translation_timestep ();
34 virtual void finalize ();
35 virtual void process_music ();
38 TRANSLATOR_DECLARATIONS (Slur_engraver);
41 Slur_engraver::Slur_engraver ()
43 events_[START] = events_[STOP] = 0;
47 Slur_engraver::try_music (Music *m)
49 if (m->is_mus_type ("slur-event"))
51 Direction d = to_dir (m->get_property ("span-direction"));
67 Slur_engraver::set_melisma (bool m)
69 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
73 Slur_engraver::acknowledge_grob (Grob_info info)
76 if (Note_column::has_interface (info.grob_))
78 for (int i = slurs_.size (); i--; )
79 Slur::add_column (slurs_[i], e);
80 for (int i = end_slurs_.size (); i-- ; )
81 Slur::add_column (end_slurs_[i], e);
85 SCM inside = e->get_property ("inside-slur");
86 if (Tie::has_interface (e)
87 || to_boolean (inside))
89 for (int i = slurs_.size (); i--; )
90 Slur::add_extra_encompass (slurs_[i], e);
91 for (int i = end_slurs_.size (); i--; )
92 Slur::add_extra_encompass (end_slurs_[i], e);
94 else if (inside == SCM_BOOL_F)
96 Grob *slur = slurs_.size()?slurs_[0] : 0;
97 slur = (end_slurs_.size () && !slur)
98 ? end_slurs_[0] : slur;
102 e->add_offset_callback (Slur::outside_slur_callback_proc, Y_AXIS);
103 e->set_property ("slur", slur->self_scm());
110 Slur_engraver::finalize ()
113 slurs_[0]->warning (_("unterminated slur"));
117 Slur_engraver::process_music ()
121 if (slurs_.size() == 0)
123 events_[STOP]->origin()->warning (_ ("No slur to end"));
130 if (events_[START] && slurs_.is_empty ())
132 Music *ev = events_[START];
134 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
136 Grob * slur = make_spanner ("Slur", events_[START]->self_scm ());
137 Direction updown = to_dir (ev->get_property ("direction"));
138 if (updown && !double_slurs)
139 set_grob_direction (slur, updown);
145 set_grob_direction (slur, DOWN);
146 slur = make_spanner ("Slur", events_[START]->self_scm ());
147 set_grob_direction (slur, UP);
151 set_melisma (slurs_.size ());
155 Slur_engraver::stop_translation_timestep ()
158 events_[START] = events_[STOP] = 0;
161 ADD_TRANSLATOR (Slur_engraver,
162 /* descr */ "Build slurs grobs from slur events",
164 /* accepts */ "slur-event",
165 /* acks */ "note-column-interface accidental-interface fingering-interface script-interface tie-interface text-script-interface",
166 /* reads */ "slurMelismaBusy doubleSlurs",