2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2004 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 ("slur-event"))
50 Let's not start more than one slur per moment.
52 Direction d = to_dir (ev->get_mus_property ("span-direction"));
55 if (now_mom () > last_start_)
57 new_slur_evs_.push (ev);
58 last_start_ = now_mom ();
62 But we swallow other slur events.
72 for (int j = new_slur_evs_.size(); j--;)
74 Direction nd = to_dir (new_slur_evs_[j]->get_mus_property ("span-direction"));
80 new_slur_evs_.push (ev);
88 Slur_engraver::set_melisma (bool m)
90 daddy_trans_->set_property ("slurMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
94 Slur_engraver::acknowledge_grob (Grob_info info)
96 if (Note_column::has_interface (info.grob_))
99 for (int i = 0; i < slur_stack_.size (); i++)
100 Slur::add_column (slur_stack_[i], e);
101 for (int i = 0; i < end_slurs_.size (); i++)
102 Slur::add_column (end_slurs_[i], e);
107 Slur_engraver::finalize ()
109 for (int i = 0; i < slur_stack_.size (); i++)
112 Let's not typeset unterminated stuff
114 slur_stack_[i]->suicide ();
116 slur_stack_.clear ();
118 for (int i=0; i < events_.size (); i++)
120 events_[i]->origin ()->warning (_ ("unterminated slur"));
125 Slur_engraver::process_music ()
127 Link_array<Grob> start_slurs;
128 for (int i=0; i< new_slur_evs_.size (); i++)
130 Music* slur_ev = new_slur_evs_[i];
131 // end slur: move the slur to other array
132 Direction d = to_dir (slur_ev->get_mus_property ("span-direction"));
135 if (slur_stack_.empty ())
136 /* How to shut up this warning, when Voice_devnull_engraver has
137 eaten start event? */
138 slur_ev->origin ()->warning (_f ("can't find start of slur"));
141 Grob* slur = slur_stack_.pop ();
143 end_slurs_.push (slur);
149 // push a new slur onto stack.
150 // (use temp. array to wait for all slur STOPs)
151 Grob* slur = make_spanner ("Slur");
152 Slur::set_interface (slur); // cannot remove yet!
155 if (Direction updown = to_dir (slur_ev->get_mus_property ("direction")))
157 slur->set_grob_property ("direction", gh_int2scm (updown));
160 start_slurs.push (slur);
161 events_.push (slur_ev);
162 announce_grob (slur, slur_ev->self_scm ());
166 slur_stack_.concat (start_slurs);
168 set_melisma (slur_stack_.size ());
170 new_slur_evs_.clear ();
174 Slur_engraver::stop_translation_timestep ()
176 for (int i = 0; i < end_slurs_.size (); i++)
178 typeset_grob (end_slurs_[i]);
181 new_slur_evs_.clear ();
186 ENTER_DESCRIPTION (Slur_engraver,
187 /* descr */ "Build slurs from Slur_evs",
189 /* accepts */ "slur-event",
190 /* acks */ "note-column-interface",
191 /* reads */ "slurMelismaBusy",