2 tie-engraver.cc -- implement Tie_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
12 #include "grob-pitch-tuple.hh"
13 #include "international.hh"
15 #include "note-head.hh"
16 #include "protected-scm.hh"
18 #include "staff-symbol-referencer.hh"
19 #include "stream-event.hh"
20 #include "tie-column.hh"
24 #include "translator.icc"
27 Manufacture ties. Acknowledge noteheads, and put them into a
28 priority queue. If we have a TieEvent, connect the notes that finish
29 just at this time, and note that start at this time.
31 TODO: Remove the dependency on musical info. We should tie on the
32 basis of position and duration-log of the heads (not of the events).
35 struct Head_event_tuple
46 tie_definition_ = SCM_EOL;
50 class Tie_engraver : public Engraver
53 vector<Grob*> now_heads_;
54 vector<Head_event_tuple> heads_to_tie_;
60 void stop_translation_timestep ();
61 virtual void derived_mark () const;
62 void start_translation_timestep ();
63 DECLARE_ACKNOWLEDGER (note_head);
64 DECLARE_TRANSLATOR_LISTENER (tie);
65 void process_music ();
66 void typeset_tie (Grob *);
68 TRANSLATOR_DECLARATIONS (Tie_engraver);
72 Tie_engraver::derived_mark () const
74 Engraver::derived_mark ();
75 for (vsize i = 0; i < heads_to_tie_.size (); i++)
76 scm_gc_mark (heads_to_tie_[i].tie_definition_);
79 Tie_engraver::Tie_engraver ()
85 IMPLEMENT_TRANSLATOR_LISTENER (Tie_engraver, tie);
87 Tie_engraver::listen_tie (Stream_event *ev)
93 Tie_engraver::process_music ()
96 context ()->set_property ("tieMelismaBusy", SCM_BOOL_T);
100 Tie_engraver::acknowledge_note_head (Grob_info i)
103 now_heads_.push_back (h);
104 for (vsize i = heads_to_tie_.size (); i--;)
106 Grob *th = heads_to_tie_[i].head_;
107 Stream_event *right_ev = unsmob_stream_event (h->get_property ("cause"));
108 Stream_event *left_ev = unsmob_stream_event (th->get_property ("cause"));
111 maybe should check positions too.
113 if (right_ev && left_ev
114 && !to_boolean (left_ev->get_property ("untied"))
115 && ly_is_equal (right_ev->get_property ("pitch"),
116 left_ev->get_property ("pitch")))
118 Grob *p = new Spanner (heads_to_tie_[i].tie_definition_,
119 context ()->get_grob_key ("Tie"));
120 announce_grob (p, heads_to_tie_[i].event_->self_scm ());
121 Tie::set_head (p, LEFT, th);
122 Tie::set_head (p, RIGHT, h);
125 heads_to_tie_.erase (heads_to_tie_.begin () + i);
129 if (ties_.size () && ! tie_column_)
130 tie_column_ = make_spanner ("TieColumn", ties_[0]->self_scm ());
133 for (vsize i = ties_.size (); i--;)
134 Tie_column::add_tie (tie_column_, ties_[i]);
138 Tie_engraver::start_translation_timestep ()
140 context ()->set_property ("tieMelismaBusy",
141 ly_bool2scm (heads_to_tie_.size ()));
144 if (!to_boolean (get_property ("tieWaitForNote")))
146 Moment now = now_mom ();
147 for (vsize i = heads_to_tie_.size (); i--; )
149 if (now > heads_to_tie_[i].end_moment_)
150 heads_to_tie_.erase (heads_to_tie_.begin () + i);
156 Tie_engraver::stop_translation_timestep ()
160 if (!to_boolean (get_property ("tieWaitForNote")))
161 heads_to_tie_.clear ();
163 for (vsize i = 0; i < ties_.size (); i++)
164 typeset_tie (ties_[i]);
173 = updated_grob_properties (context (), ly_symbol2scm ("Tie"));
175 if (!to_boolean (get_property ("tieWaitForNote")))
176 heads_to_tie_.clear ();
178 for (vsize i = 0; i < now_heads_.size (); i++)
180 Grob *head = now_heads_[i];
181 Stream_event *left_ev = unsmob_stream_event (head->get_property ("cause"));
184 Head_event_tuple event_tup;
186 event_tup.head_ = head;
187 event_tup.tie_definition_ = start_definition;
188 event_tup.event_ = event_;
190 Moment end = now_mom ();
193 end.grace_part_ += get_event_length (left_ev).main_part_;
197 end += get_event_length (left_ev);
199 event_tup.end_moment_ = end;
201 heads_to_tie_.push_back (event_tup);
211 Tie_engraver::typeset_tie (Grob *her)
213 if (! (Tie::head (her, LEFT) && Tie::head (her, RIGHT)))
214 warning (_ ("lonely tie"));
217 Drul_array<Grob *> new_head_drul;
218 new_head_drul[LEFT] = Tie::head (her, LEFT);
219 new_head_drul[RIGHT] = Tie::head (her, RIGHT);
222 if (!Tie::head (her, d))
223 new_head_drul[d] = Tie::head (her, (Direction) - d);
225 while (flip (&d) != LEFT);
227 Spanner *sp = dynamic_cast<Spanner*> (her);
228 sp->set_bound (LEFT, new_head_drul[LEFT]);
229 sp->set_bound (RIGHT, new_head_drul[RIGHT]);
232 ADD_ACKNOWLEDGER (Tie_engraver, note_head);
233 ADD_TRANSLATOR (Tie_engraver,
234 /* doc */ "Generate ties between noteheads of equal pitch.",
239 /* accept */ "tie-event",
240 /* read */ "tieWaitForNote",
241 /* write */ "tieMelismaBusy");