2 slur-engraver.cc -- implement Slur_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
12 #include "directional-element-interface.hh"
13 #include "international.hh"
14 #include "note-column.hh"
20 It is possible that a slur starts and ends on the same note. At
21 least, it is for phrasing slurs: a note can be both beginning and
24 class Slur_engraver : public Engraver
26 Drul_array<Music *> events_;
27 Music *running_slur_start_;
29 vector<Grob*> end_slurs_;
31 void set_melisma (bool);
34 virtual bool try_music (Music *);
36 DECLARE_ACKNOWLEDGER (accidental);
37 DECLARE_ACKNOWLEDGER (dynamic_line_spanner);
38 DECLARE_ACKNOWLEDGER (fingering);
39 DECLARE_ACKNOWLEDGER (note_column);
40 DECLARE_ACKNOWLEDGER (script);
41 DECLARE_ACKNOWLEDGER (text_script);
42 DECLARE_ACKNOWLEDGER (tie);
43 DECLARE_ACKNOWLEDGER (tuplet_number);
44 void acknowledge_extra_object (Grob_info);
45 void stop_translation_timestep ();
46 virtual void finalize ();
47 void process_music ();
50 TRANSLATOR_DECLARATIONS (Slur_engraver);
53 Slur_engraver::Slur_engraver ()
55 events_[START] = events_[STOP] = 0;
59 Slur_engraver::try_music (Music *m)
61 if (m->is_mus_type ("slur-event"))
63 Direction d = to_dir (m->get_property ("span-direction"));
79 Slur_engraver::set_melisma (bool m)
81 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T : SCM_BOOL_F);
85 Slur_engraver::acknowledge_note_column (Grob_info info)
87 Grob *e = info.grob ();
88 for (vsize i = slurs_.size (); i--;)
89 Slur::add_column (slurs_[i], e);
90 for (vsize i = end_slurs_.size (); i--;)
91 Slur::add_column (end_slurs_[i], e);
95 Slur_engraver::acknowledge_extra_object (Grob_info info)
97 Slur::auxiliary_acknowledge_extra_object (info, slurs_, end_slurs_);
101 Slur_engraver::acknowledge_accidental (Grob_info info)
103 acknowledge_extra_object (info);
107 Slur_engraver::acknowledge_dynamic_line_spanner (Grob_info info)
109 acknowledge_extra_object (info);
113 Slur_engraver::acknowledge_fingering (Grob_info info)
115 acknowledge_extra_object (info);
119 Slur_engraver::acknowledge_tuplet_number (Grob_info info)
121 acknowledge_extra_object (info);
126 Slur_engraver::acknowledge_script (Grob_info info)
128 if (!info.grob ()->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
129 acknowledge_extra_object (info);
133 Slur_engraver::acknowledge_text_script (Grob_info info)
135 acknowledge_extra_object (info);
139 Slur_engraver::acknowledge_tie (Grob_info info)
141 acknowledge_extra_object (info);
145 Slur_engraver::finalize ()
148 slurs_[0]->warning (_ ("unterminated slur"));
152 Slur_engraver::process_music ()
156 if (slurs_.size () == 0)
157 events_[STOP]->origin ()->warning (_ ("can't end slur"));
164 if (events_[START] && slurs_.empty ())
166 Music *ev = events_[START];
168 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
170 Grob *slur = make_spanner ("Slur", events_[START]->self_scm ());
171 Direction updown = to_dir (ev->get_property ("direction"));
172 if (updown && !double_slurs)
173 set_grob_direction (slur, updown);
175 slurs_.push_back (slur);
179 set_grob_direction (slur, DOWN);
180 slur = make_spanner ("Slur", events_[START]->self_scm ());
181 set_grob_direction (slur, UP);
182 slurs_.push_back (slur);
185 set_melisma (slurs_.size ());
189 Slur_engraver::stop_translation_timestep ()
191 for (vsize i = 0; i < end_slurs_.size (); i++)
192 announce_end_grob (end_slurs_[i], SCM_EOL);
194 events_[START] = events_[STOP] = 0;
197 #include "translator.icc"
199 ADD_ACKNOWLEDGER (Slur_engraver, accidental);
200 ADD_ACKNOWLEDGER (Slur_engraver, dynamic_line_spanner);
201 ADD_ACKNOWLEDGER (Slur_engraver, fingering);
202 ADD_ACKNOWLEDGER (Slur_engraver, note_column);
203 ADD_ACKNOWLEDGER (Slur_engraver, script);
204 ADD_ACKNOWLEDGER (Slur_engraver, text_script);
205 ADD_ACKNOWLEDGER (Slur_engraver, tie);
206 ADD_ACKNOWLEDGER (Slur_engraver, tuplet_number);
207 ADD_TRANSLATOR (Slur_engraver,
208 /* doc */ "Build slur grobs from slur events",
210 /* accept */ "slur-event",
211 /* read */ "slurMelismaBusy doubleSlurs",