2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 #include "musical-request.hh"
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<Span_req> requests_;
21 Link_array<Span_req> 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 (Span_req *sl = dynamic_cast <Span_req *> (req))
50 String t = ly_scm2string (sl->get_mus_property ("span-type"));
53 for (int i = 0; i < slur_stack_.size (); i++)
55 slur_stack_[i]->suicide ();
58 for (int i = 0; i < end_slurs_.size (); i++)
60 end_slurs_[i]->suicide ();
64 new_slur_reqs_.clear ();
69 Let's not start more than one slur per moment.
71 if (sl->get_span_dir () == START)
73 if (now_mom () > last_start_)
75 new_slur_reqs_.push (sl);
76 last_start_ = now_mom ();
80 But we swallow other slur requests.
86 else if (sl->get_span_dir () == STOP)
89 Swallow other requests.
91 for (int j = new_slur_reqs_.size(); j--;)
92 if (new_slur_reqs_[j]->get_span_dir() == STOP)
95 new_slur_reqs_.push (sl);
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 typeset_grob (slur_stack_[i]);
131 Let's not typeset unterminated stuff
133 slur_stack_[i]->suicide ();
136 slur_stack_.clear ();
138 for (int i=0; i < requests_.size (); i++)
140 requests_[i]->origin ()->warning (_ ("unterminated slur"));
145 Slur_engraver::process_acknowledged_grobs ()
147 Link_array<Grob> start_slurs;
148 for (int i=0; i< new_slur_reqs_.size (); i++)
150 Span_req* slur_req = new_slur_reqs_[i];
151 // end slur: move the slur to other array
152 if (slur_req->get_span_dir () == STOP)
154 if (slur_stack_.empty ())
155 /* How to shut up this warning, when Voice_devnull_engraver has
156 eaten start request? */
157 slur_req->origin ()->warning (_f ("can't find start of slur"));
160 Grob* slur = slur_stack_.pop ();
162 end_slurs_.push (slur);
166 else if (slur_req->get_span_dir () == START)
168 // push a new slur onto stack.
169 // (use temp. array to wait for all slur STOPs)
170 Grob* slur = new Spanner (get_property ("Slur"));
171 Slur::set_interface (slur); // cannot remove yet!
172 start_slurs.push (slur);
173 requests_.push (slur_req);
174 announce_grob (slur, slur_req->self_scm ());
177 for (int i=0; i < start_slurs.size (); i++)
178 slur_stack_.push (start_slurs[i]);
179 new_slur_reqs_.clear ();
183 Slur_engraver::stop_translation_timestep ()
185 for (int i = 0; i < end_slurs_.size (); i++)
187 typeset_grob (end_slurs_[i]);
193 Slur_engraver::start_translation_timestep ()
195 new_slur_reqs_.clear ();
196 SCM m = get_property ("automaticMelismata");
199 set_melisma (slur_stack_.size ());
205 ENTER_DESCRIPTION (Slur_engraver,
206 /* descr */ "Build slurs from Slur_reqs",
208 /* acks */ "note-column-interface",
209 /* reads */ "slurMelismaBusy",