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"
17 #include "stream-event.hh"
20 #include "translator.icc"
23 It is possible that a slur starts and ends on the same note. At
24 least, it is for phrasing slurs: a note can be both beginning and
27 class Slur_engraver : public Engraver
29 Drul_array<Stream_event *> events_;
30 Stream_event *running_slur_start_;
32 vector<Grob*> end_slurs_;
34 void set_melisma (bool);
37 DECLARE_TRANSLATOR_LISTENER (slur);
38 DECLARE_ACKNOWLEDGER (accidental);
39 DECLARE_ACKNOWLEDGER (dynamic_line_spanner);
40 DECLARE_ACKNOWLEDGER (fingering);
41 DECLARE_ACKNOWLEDGER (note_column);
42 DECLARE_ACKNOWLEDGER (script);
43 DECLARE_ACKNOWLEDGER (text_script);
44 DECLARE_ACKNOWLEDGER (tie);
45 DECLARE_ACKNOWLEDGER (tuplet_number);
46 void acknowledge_extra_object (Grob_info);
47 void stop_translation_timestep ();
48 virtual void finalize ();
49 void process_music ();
52 TRANSLATOR_DECLARATIONS (Slur_engraver);
55 Slur_engraver::Slur_engraver ()
57 events_[START] = events_[STOP] = 0;
60 IMPLEMENT_TRANSLATOR_LISTENER (Slur_engraver, slur);
62 Slur_engraver::listen_slur (Stream_event *ev)
64 Direction d = to_dir (ev->get_property ("span-direction"));
66 ASSIGN_EVENT_ONCE (events_[START], ev);
68 ASSIGN_EVENT_ONCE (events_[STOP], ev);
69 else ev->origin ()->warning (_ ("Invalid direction of slur-event"));
73 Slur_engraver::set_melisma (bool m)
75 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T : SCM_BOOL_F);
79 Slur_engraver::acknowledge_note_column (Grob_info info)
81 Grob *e = info.grob ();
82 for (vsize i = slurs_.size (); i--;)
83 Slur::add_column (slurs_[i], e);
84 for (vsize i = end_slurs_.size (); i--;)
85 Slur::add_column (end_slurs_[i], e);
89 Slur_engraver::acknowledge_extra_object (Grob_info info)
91 Slur::auxiliary_acknowledge_extra_object (info, slurs_, end_slurs_);
95 Slur_engraver::acknowledge_accidental (Grob_info info)
97 acknowledge_extra_object (info);
101 Slur_engraver::acknowledge_dynamic_line_spanner (Grob_info info)
103 acknowledge_extra_object (info);
107 Slur_engraver::acknowledge_fingering (Grob_info info)
109 acknowledge_extra_object (info);
113 Slur_engraver::acknowledge_tuplet_number (Grob_info info)
115 acknowledge_extra_object (info);
120 Slur_engraver::acknowledge_script (Grob_info info)
122 if (!info.grob ()->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
123 acknowledge_extra_object (info);
127 Slur_engraver::acknowledge_text_script (Grob_info info)
129 acknowledge_extra_object (info);
133 Slur_engraver::acknowledge_tie (Grob_info info)
135 acknowledge_extra_object (info);
139 Slur_engraver::finalize ()
142 slurs_[0]->warning (_ ("unterminated slur"));
146 Slur_engraver::process_music ()
150 if (slurs_.size () == 0)
151 events_[STOP]->origin ()->warning (_ ("can't end slur"));
158 if (events_[START] && slurs_.empty ())
160 Stream_event *ev = events_[START];
162 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
164 Grob *slur = make_spanner ("Slur", events_[START]->self_scm ());
165 Direction updown = to_dir (ev->get_property ("direction"));
166 if (updown && !double_slurs)
167 set_grob_direction (slur, updown);
169 slurs_.push_back (slur);
173 set_grob_direction (slur, DOWN);
174 slur = make_spanner ("Slur", events_[START]->self_scm ());
175 set_grob_direction (slur, UP);
176 slurs_.push_back (slur);
179 set_melisma (slurs_.size ());
183 Slur_engraver::stop_translation_timestep ()
185 for (vsize i = 0; i < end_slurs_.size (); i++)
186 announce_end_grob (end_slurs_[i], SCM_EOL);
188 events_[START] = events_[STOP] = 0;
191 ADD_ACKNOWLEDGER (Slur_engraver, accidental);
192 ADD_ACKNOWLEDGER (Slur_engraver, dynamic_line_spanner);
193 ADD_ACKNOWLEDGER (Slur_engraver, fingering);
194 ADD_ACKNOWLEDGER (Slur_engraver, note_column);
195 ADD_ACKNOWLEDGER (Slur_engraver, script);
196 ADD_ACKNOWLEDGER (Slur_engraver, text_script);
197 ADD_ACKNOWLEDGER (Slur_engraver, tie);
198 ADD_ACKNOWLEDGER (Slur_engraver, tuplet_number);
199 ADD_TRANSLATOR (Slur_engraver,
200 /* doc */ "Build slur grobs from slur events",
202 /* accept */ "slur-event",
203 /* read */ "slurMelismaBusy doubleSlurs",