2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "note-column.hh"
12 #include "directional-element-interface.hh"
13 #include "engraver.hh"
18 It is possible that a slur starts and ends on the same note. At
19 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*);
34 virtual void acknowledge_grob (Grob_info);
35 virtual void stop_translation_timestep ();
36 virtual void finalize ();
37 virtual void process_music ();
40 TRANSLATOR_DECLARATIONS (Slur_engraver);
43 Slur_engraver::Slur_engraver ()
45 events_[START] =events_[STOP] = 0;
49 Slur_engraver::try_music (Music *m)
51 if (m->is_mus_type ("slur-event"))
54 Let's not start more than one slur per moment.
56 Direction d = to_dir (m->get_property ("span-direction"));
64 if (slurs_.is_empty ())
75 Slur_engraver::set_melisma (bool m)
77 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
81 Slur_engraver::acknowledge_grob (Grob_info info)
84 if (Note_column::has_interface (info.grob_))
86 for (int i = slurs_.size (); i--; )
87 New_slur::add_column (slurs_[i], e);
88 for (int i = end_slurs_.size (); i-- ; )
89 New_slur::add_column (end_slurs_[i], e);
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 New_slur::add_extra_encompass (slurs_[i], e);
99 for (int i = end_slurs_.size (); i--; )
100 New_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 (New_slur::outside_slur_callback_proc, Y_AXIS);
111 e->set_property ("slur", slur->self_scm());
118 Slur_engraver::finalize ()
121 slurs_[0]->warning (_("unterminated slur"));
125 Slur_engraver::process_music ()
133 if (events_[START] && slurs_.is_empty ())
135 Music *ev = events_[START];
137 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
139 Grob * slur = make_spanner ("Slur", events_[START]->self_scm ());
140 Direction updown = to_dir (ev->get_property ("direction"));
141 if (updown && !double_slurs)
142 set_grob_direction (slur, updown);
148 set_grob_direction (slur, DOWN);
149 slur = make_spanner ("Slur", events_[START]->self_scm ());
150 set_grob_direction (slur, UP);
154 set_melisma (slurs_.size ());
158 Slur_engraver::stop_translation_timestep ()
161 events_[START] = events_[STOP] = 0;
164 ENTER_DESCRIPTION (Slur_engraver,
165 /* descr */ "Build slurs grobs from slur events",
167 /* accepts */ "slur-event",
168 /* acks */ "note-column-interface accidental-interface fingering-interface script-interface tie-interface",
169 /* reads */ "slurMelismaBusy doubleSlurs",