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 finalize ();
33 virtual void process_music ();
36 TRANSLATOR_DECLARATIONS (Slur_engraver);
39 Slur_engraver::Slur_engraver ()
41 last_start_ = Moment (-1);
45 Slur_engraver::try_music (Music *ev)
47 if (ev->is_mus_type ("abort-event"))
49 for (int i = 0; i < slur_stack_.size (); i++)
51 slur_stack_[i]->suicide ();
54 for (int i = 0; i < end_slurs_.size (); i++)
56 end_slurs_[i]->suicide ();
60 new_slur_evs_.clear ();
62 else if (ev->is_mus_type ("slur-event"))
65 Let's not start more than one slur per moment.
67 Direction d = to_dir (ev->get_mus_property ("span-direction"));
70 if (now_mom () > last_start_)
72 new_slur_evs_.push (ev);
73 last_start_ = now_mom ();
77 But we swallow other slur events.
87 for (int j = new_slur_evs_.size(); j--;)
89 Direction nd = to_dir (new_slur_evs_[j]->get_mus_property ("span-direction"));
95 new_slur_evs_.push (ev);
103 Slur_engraver::set_melisma (bool m)
105 daddy_trans_->set_property ("slurMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
109 Slur_engraver::acknowledge_grob (Grob_info info)
111 if (Note_column::has_interface (info.grob_))
114 for (int i = 0; i < slur_stack_.size (); i++)
115 Slur::add_column (slur_stack_[i], e);
116 for (int i = 0; i < end_slurs_.size (); i++)
117 Slur::add_column (end_slurs_[i], e);
122 Slur_engraver::finalize ()
124 for (int i = 0; i < slur_stack_.size (); i++)
127 Let's not typeset unterminated stuff
129 slur_stack_[i]->suicide ();
131 slur_stack_.clear ();
133 for (int i=0; i < events_.size (); i++)
135 events_[i]->origin ()->warning (_ ("unterminated slur"));
140 Slur_engraver::process_music ()
142 Link_array<Grob> start_slurs;
143 for (int i=0; i< new_slur_evs_.size (); i++)
145 Music* slur_ev = new_slur_evs_[i];
146 // end slur: move the slur to other array
147 Direction d = to_dir (slur_ev->get_mus_property ("span-direction"));
150 if (slur_stack_.empty ())
151 /* How to shut up this warning, when Voice_devnull_engraver has
152 eaten start event? */
153 slur_ev->origin ()->warning (_f ("can't find start of slur"));
156 Grob* slur = slur_stack_.pop ();
158 end_slurs_.push (slur);
164 // push a new slur onto stack.
165 // (use temp. array to wait for all slur STOPs)
166 Grob* slur = new Spanner (get_property ("Slur"));
167 Slur::set_interface (slur); // cannot remove yet!
170 if (Direction updown = to_dir (slur_ev->get_mus_property ("direction")))
172 slur->set_grob_property ("direction", gh_int2scm (updown));
175 start_slurs.push (slur);
176 events_.push (slur_ev);
177 announce_grob (slur, slur_ev->self_scm ());
181 slur_stack_.concat (start_slurs);
183 set_melisma (slur_stack_.size ());
185 new_slur_evs_.clear ();
189 Slur_engraver::stop_translation_timestep ()
191 for (int i = 0; i < end_slurs_.size (); i++)
193 typeset_grob (end_slurs_[i]);
196 new_slur_evs_.clear ();
201 ENTER_DESCRIPTION (Slur_engraver,
202 /* descr */ "Build slurs from Slur_evs",
204 /* accepts */ "slur-event",
205 /* acks */ "note-column-interface",
206 /* reads */ "slurMelismaBusy",