2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2001 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"
15 class Slur_engraver : public Engraver
17 Link_array<Span_req> requests_arr_;
18 Link_array<Span_req> new_slur_req_l_arr_;
19 Link_array<Grob> slur_l_stack_;
20 Link_array<Grob> end_slur_l_arr_;
23 void set_melisma (bool);
26 virtual bool try_music (Music*);
27 virtual void acknowledge_grob (Grob_info);
28 virtual void stop_translation_timestep ();
29 virtual void start_translation_timestep ();
30 virtual void finalize ();
31 virtual void create_grobs ();
34 VIRTUAL_COPY_CONS (Translator);
38 Slur_engraver::Slur_engraver ()
40 last_start_ = Moment (-1);
44 Slur_engraver::try_music (Music *req_l)
46 if (Span_req *sl = dynamic_cast <Span_req *> (req_l))
48 String t = ly_scm2string (sl->get_mus_property ("span-type"));
51 for (int i = 0; i < slur_l_stack_.size (); i++)
53 slur_l_stack_[i]->suicide ();
55 slur_l_stack_.clear ();
56 for (int i = 0; i < end_slur_l_arr_.size (); i++)
58 end_slur_l_arr_[i]->suicide ();
60 end_slur_l_arr_.clear ();
61 requests_arr_.clear ();
62 new_slur_req_l_arr_.clear ();
67 Let's not start more than one slur per moment.
69 if (sl->get_span_dir() == START)
71 if (now_mom () > last_start_)
73 new_slur_req_l_arr_.push (sl);
74 last_start_ = now_mom ();
80 new_slur_req_l_arr_.push (sl);
89 Slur_engraver::set_melisma (bool m)
91 daddy_trans_l_->set_property ("slurMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
95 Slur_engraver::acknowledge_grob (Grob_info info)
97 if (Note_column::has_interface (info.elem_l_))
99 Grob *e =info.elem_l_;
100 for (int i = 0; i < slur_l_stack_.size (); i++)
101 Slur::add_column (slur_l_stack_[i], e);
102 for (int i = 0; i < end_slur_l_arr_.size (); i++)
103 Slur::add_column (end_slur_l_arr_[i], e);
108 Slur_engraver::finalize ()
110 for (int i = 0; i < slur_l_stack_.size (); i++)
113 typeset_grob (slur_l_stack_[i]);
116 Let's not typeset unterminated stuff
118 slur_l_stack_[i]->suicide ();
121 slur_l_stack_.clear ();
122 SCM wg = get_property ("weAreGraceContext");
123 bool wgb = to_boolean (wg);
125 for (int i=0; i < requests_arr_.size (); i++)
127 requests_arr_[i]->origin ()->warning (_ ("unterminated slur"));
132 Slur_engraver::create_grobs ()
134 Link_array<Grob> start_slur_l_arr;
135 for (int i=0; i< new_slur_req_l_arr_.size (); i++)
137 Span_req* slur_req_l = new_slur_req_l_arr_[i];
138 // end slur: move the slur to other array
139 if (slur_req_l->get_span_dir() == STOP)
141 if (slur_l_stack_.empty ())
142 /* How to shut up this warning, when Voice_devnull_engraver has
143 eaten start request? */
144 slur_req_l->origin ()->warning (_f ("can't find start of slur"));
147 Grob* slur = slur_l_stack_.pop ();
148 SCM s = get_property ("slurEndAttachment");
151 index_set_cell (slur->get_grob_property ("attachment"), STOP, s);
153 end_slur_l_arr_.push (slur);
154 requests_arr_.pop ();
157 else if (slur_req_l->get_span_dir() == START)
159 // push a new slur onto stack.
160 // (use temp. array to wait for all slur STOPs)
161 Grob* slur = new Spanner (get_property ("Slur"));
162 Slur::set_interface (slur);
163 SCM s = get_property ("slurBeginAttachment");
166 index_set_cell (slur->get_grob_property ("attachment"), START, s);
168 start_slur_l_arr.push (slur);
169 requests_arr_.push (slur_req_l);
170 announce_grob (slur, slur_req_l);
173 for (int i=0; i < start_slur_l_arr.size (); i++)
174 slur_l_stack_.push (start_slur_l_arr[i]);
175 new_slur_req_l_arr_.clear ();
179 Slur_engraver::stop_translation_timestep ()
181 for (int i = 0; i < end_slur_l_arr_.size (); i++)
183 typeset_grob (end_slur_l_arr_[i]);
185 end_slur_l_arr_.clear ();
189 Slur_engraver::start_translation_timestep ()
191 new_slur_req_l_arr_.clear ();
192 SCM m = get_property ("automaticMelismata");
195 set_melisma (slur_l_stack_.size ());
200 ADD_THIS_TRANSLATOR (Slur_engraver);