2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2002 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> requests_;
21 Link_array<Music> new_slur_reqs_;
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_acknowledged_grobs ();
37 TRANSLATOR_DECLARATIONS (Slur_engraver);
40 Slur_engraver::Slur_engraver ()
42 last_start_ = Moment (-1);
46 Slur_engraver::try_music (Music *req)
48 if (req->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_reqs_.clear ();
63 else if (req->is_mus_type ("slur-event"))
66 Let's not start more than one slur per moment.
68 Direction d = to_dir (req->get_mus_property ("span-direction"));
71 if (now_mom () > last_start_)
73 new_slur_reqs_.push (req);
74 last_start_ = now_mom ();
78 But we swallow other slur requests.
87 Swallow other requests.
89 for (int j = new_slur_reqs_.size(); j--;)
91 Direction nd = to_dir (new_slur_reqs_[j]->get_mus_property ("span-direction"));
97 new_slur_reqs_.push (req);
105 Slur_engraver::set_melisma (bool m)
107 daddy_trans_->set_property ("slurMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
111 Slur_engraver::acknowledge_grob (Grob_info info)
113 if (Note_column::has_interface (info.grob_))
116 for (int i = 0; i < slur_stack_.size (); i++)
117 Slur::add_column (slur_stack_[i], e);
118 for (int i = 0; i < end_slurs_.size (); i++)
119 Slur::add_column (end_slurs_[i], e);
124 Slur_engraver::finalize ()
126 for (int i = 0; i < slur_stack_.size (); i++)
129 typeset_grob (slur_stack_[i]);
132 Let's not typeset unterminated stuff
134 slur_stack_[i]->suicide ();
137 slur_stack_.clear ();
139 for (int i=0; i < requests_.size (); i++)
141 requests_[i]->origin ()->warning (_ ("unterminated slur"));
146 Slur_engraver::process_acknowledged_grobs ()
148 Link_array<Grob> start_slurs;
149 for (int i=0; i< new_slur_reqs_.size (); i++)
151 Music* slur_req = new_slur_reqs_[i];
152 // end slur: move the slur to other array
153 Direction d = to_dir (slur_req->get_mus_property ("span-direction"));
156 if (slur_stack_.empty ())
157 /* How to shut up this warning, when Voice_devnull_engraver has
158 eaten start request? */
159 slur_req->origin ()->warning (_f ("can't find start of slur"));
162 Grob* slur = slur_stack_.pop ();
164 end_slurs_.push (slur);
170 // push a new slur onto stack.
171 // (use temp. array to wait for all slur STOPs)
172 Grob* slur = new Spanner (get_property ("Slur"));
173 Slur::set_interface (slur); // cannot remove yet!
174 start_slurs.push (slur);
175 requests_.push (slur_req);
176 announce_grob (slur, slur_req->self_scm ());
179 for (int i=0; i < start_slurs.size (); i++)
180 slur_stack_.push (start_slurs[i]);
181 new_slur_reqs_.clear ();
185 Slur_engraver::stop_translation_timestep ()
187 for (int i = 0; i < end_slurs_.size (); i++)
189 typeset_grob (end_slurs_[i]);
195 Slur_engraver::start_translation_timestep ()
197 new_slur_reqs_.clear ();
198 SCM m = get_property ("automaticMelismata");
201 set_melisma (slur_stack_.size ());
207 ENTER_DESCRIPTION (Slur_engraver,
208 /* descr */ "Build slurs from Slur_reqs",
210 /* accepts */ "slur-event",
211 /* acks */ "note-column-interface",
212 /* reads */ "slurMelismaBusy",