2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "note-column.hh"
11 #include "translator-group.hh"
12 #include "engraver.hh"
16 TODO: junk nested slur functionality.
18 class Slur_engraver : public Engraver
20 Link_array<Music> events_;
21 Link_array<Music> new_slur_evs_;
22 Link_array<Grob> slur_stack_;
23 Link_array<Grob> end_slurs_;
26 void set_melisma (bool);
29 virtual bool try_music (Music*);
30 virtual void acknowledge_grob (Grob_info);
31 virtual void stop_translation_timestep ();
32 virtual void start_translation_timestep ();
33 virtual void finalize ();
34 virtual void process_music ();
37 TRANSLATOR_DECLARATIONS (Slur_engraver);
40 Slur_engraver::Slur_engraver ()
42 last_start_ = Moment (-1);
46 Slur_engraver::try_music (Music *ev)
48 if (ev->is_mus_type ("abort-event"))
50 for (int i = 0; i < slur_stack_.size (); i++)
52 slur_stack_[i]->suicide ();
55 for (int i = 0; i < end_slurs_.size (); i++)
57 end_slurs_[i]->suicide ();
61 new_slur_evs_.clear ();
63 else if (ev->is_mus_type ("slur-event"))
66 Let's not start more than one slur per moment.
68 Direction d = to_dir (ev->get_mus_property ("span-direction"));
71 if (now_mom () > last_start_)
73 new_slur_evs_.push (ev);
74 last_start_ = now_mom ();
78 But we swallow other slur events.
88 for (int j = new_slur_evs_.size(); j--;)
90 Direction nd = to_dir (new_slur_evs_[j]->get_mus_property ("span-direction"));
96 new_slur_evs_.push (ev);
104 Slur_engraver::set_melisma (bool m)
106 daddy_trans_->set_property ("slurMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
110 Slur_engraver::acknowledge_grob (Grob_info info)
112 if (Note_column::has_interface (info.grob_))
115 for (int i = 0; i < slur_stack_.size (); i++)
116 Slur::add_column (slur_stack_[i], e);
117 for (int i = 0; i < end_slurs_.size (); i++)
118 Slur::add_column (end_slurs_[i], e);
123 Slur_engraver::finalize ()
125 for (int i = 0; i < slur_stack_.size (); i++)
128 Let's not typeset unterminated stuff
130 slur_stack_[i]->suicide ();
132 slur_stack_.clear ();
134 for (int i=0; i < events_.size (); i++)
136 events_[i]->origin ()->warning (_ ("unterminated slur"));
141 Slur_engraver::process_music ()
143 Link_array<Grob> start_slurs;
144 for (int i=0; i< new_slur_evs_.size (); i++)
146 Music* slur_ev = new_slur_evs_[i];
147 // end slur: move the slur to other array
148 Direction d = to_dir (slur_ev->get_mus_property ("span-direction"));
151 if (slur_stack_.empty ())
152 /* How to shut up this warning, when Voice_devnull_engraver has
153 eaten start event? */
154 slur_ev->origin ()->warning (_f ("can't find start of slur"));
157 Grob* slur = slur_stack_.pop ();
159 end_slurs_.push (slur);
165 // push a new slur onto stack.
166 // (use temp. array to wait for all slur STOPs)
167 Grob* slur = new Spanner (get_property ("Slur"));
168 Slur::set_interface (slur); // cannot remove yet!
171 if (Direction updown = to_dir (slur_ev->get_mus_property ("direction")))
173 slur->set_grob_property ("direction", gh_int2scm (updown));
176 start_slurs.push (slur);
177 events_.push (slur_ev);
178 announce_grob (slur, slur_ev->self_scm ());
182 slur_stack_.concat (start_slurs);
184 set_melisma (slur_stack_.size ());
186 new_slur_evs_.clear ();
190 Slur_engraver::stop_translation_timestep ()
192 for (int i = 0; i < end_slurs_.size (); i++)
194 typeset_grob (end_slurs_[i]);
200 Slur_engraver::start_translation_timestep ()
202 new_slur_evs_.clear ();
207 ENTER_DESCRIPTION (Slur_engraver,
208 /* descr */ "Build slurs from Slur_evs",
210 /* accepts */ "slur-event",
211 /* acks */ "note-column-interface",
212 /* reads */ "slurMelismaBusy",