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"
17 It is possible that a slur starts and ends on the same note. At
18 least, it is for phrasing slurs: a note can be both beginning and
22 class Slur_engraver : public Engraver
24 Drul_array<Music *> events_;
25 Music * running_slur_start_;
26 Link_array<Grob> slurs_;
27 Link_array<Grob> end_slurs_;
29 void set_melisma (bool);
32 virtual bool try_music (Music*);
33 virtual void acknowledge_grob (Grob_info);
34 virtual void stop_translation_timestep ();
35 virtual void finalize ();
36 virtual void process_music ();
39 TRANSLATOR_DECLARATIONS (Slur_engraver);
42 Slur_engraver::Slur_engraver ()
44 events_[START] =events_[STOP] = 0;
48 Slur_engraver::try_music (Music *m)
50 if (m->is_mus_type ("slur-event"))
53 Let's not start more than one slur per moment.
55 Direction d = to_dir (m->get_property ("span-direction"));
63 if (slurs_.is_empty ())
74 Slur_engraver::set_melisma (bool m)
76 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
80 Slur_engraver::acknowledge_grob (Grob_info info)
83 if (Note_column::has_interface (info.grob_))
85 for (int i = slurs_.size (); i--; )
86 New_slur::add_column (slurs_[i], e);
87 for (int i = end_slurs_.size (); i-- ; )
88 New_slur::add_column (end_slurs_[i], e);
92 if (Tie::has_interface (e)
93 || to_boolean (e->get_property ("inside-slur")))
95 for (int i = slurs_.size (); i--; )
96 New_slur::add_extra_encompass (slurs_[i], e);
97 for (int i = end_slurs_.size (); i--; )
98 New_slur::add_extra_encompass (end_slurs_[i], e);
103 Slur_engraver::finalize ()
106 slurs_[0]->warning (_("unterminated slur"));
110 Slur_engraver::process_music ()
118 if (events_[START] && slurs_.is_empty ())
120 Music *ev = events_[START];
122 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
124 Grob * slur = make_spanner ("Slur", events_[START]->self_scm ());
125 Direction updown = to_dir (ev->get_property ("direction"));
126 if (updown && !double_slurs)
127 set_grob_direction (slur, updown);
133 set_grob_direction (slur, DOWN);
134 slur = make_spanner ("Slur", events_[START]->self_scm ());
135 set_grob_direction (slur, UP);
139 set_melisma (slurs_.size ());
143 Slur_engraver::stop_translation_timestep ()
146 events_[START] = events_[STOP] = 0;
149 ENTER_DESCRIPTION (Slur_engraver,
150 /* descr */ "Build slurs grobs from slur events",
152 /* accepts */ "slur-event",
153 /* acks */ "note-column-interface accidental-interface fingering-interface script-interface tie-interface",
154 /* reads */ "slurMelismaBusy doubleSlurs",