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 *);
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)
75 Grob *e = info.grob ();
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)
122 events_[STOP]->origin ()->warning (_ ("can't end slur"));
128 if (events_[START] && slurs_.is_empty ())
130 Music *ev = events_[START];
132 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
134 Grob *slur = make_spanner ("Slur", events_[START]->self_scm ());
135 Direction updown = to_dir (ev->get_property ("direction"));
136 if (updown && !double_slurs)
137 set_grob_direction (slur, updown);
143 set_grob_direction (slur, DOWN);
144 slur = make_spanner ("Slur", events_[START]->self_scm ());
145 set_grob_direction (slur, UP);
149 set_melisma (slurs_.size ());
153 Slur_engraver::stop_translation_timestep ()
156 events_[START] = events_[STOP] = 0;
159 ADD_TRANSLATOR (Slur_engraver,
160 /* descr */ "Build slurs grobs from slur events",
162 /* accepts */ "slur-event",
163 /* acks */ "note-column-interface accidental-interface fingering-interface script-interface tie-interface text-script-interface",
164 /* reads */ "slurMelismaBusy doubleSlurs",