2 new-tie-engraver.cc -- implement Tie_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "translator-group.hh"
14 #include "tie-column.hh"
15 #include "engraver.hh"
17 #include "grob-pitch-tuple.hh"
19 #include "note-head.hh"
22 Manufacture ties. Acknowledge noteheads, and put them into a
23 priority queue. If we have a TieEvent, connect the notes that finish
24 just at this time, and note that start at this time.
26 TODO: Remove the dependency on musical info. We should tie on the
27 basis of position and duration-log of the heads (not of the events).
29 TODO: support sparseTies.
31 TODO: melismata will fuck up now:
36 melisma is after the 2nd 8th note, but will now be signaled as
37 lasting till the 3rd 16th.
39 class Tie_engraver : public Engraver
43 Link_array<Grob> now_heads_;
44 Link_array<Grob> heads_to_tie_;
45 Link_array<Grob> ties_;
47 Spanner * tie_column_;
51 virtual void stop_translation_timestep ();
52 virtual void acknowledge_grob (Grob_info);
53 virtual bool try_music (Music*);
54 virtual void process_acknowledged_grobs ();
55 void typeset_tie (Grob*);
57 TRANSLATOR_DECLARATIONS(Tie_engraver);
62 Tie_engraver::Tie_engraver ()
71 Tie_engraver::try_music (Music *mus)
73 if (mus->is_mus_type ("tie-event"))
80 SCM m = get_property ("automaticMelismata");
81 bool am = gh_boolean_p (m) &&gh_scm2bool (m);
84 daddy_trans_->set_property ("tieMelismaBusy", m ? SCM_BOOL_T : SCM_BOOL_F);
91 Tie_engraver::acknowledge_grob (Grob_info i)
93 if (Note_head::has_interface (i.grob_))
97 for (int i = heads_to_tie_.size (); i--;)
99 Grob *th = heads_to_tie_[i];
100 int staff_pos = gh_scm2int (h->get_grob_property ("staff-position"));
101 int left_staff_pos = gh_scm2int (th->get_grob_property ("staff-position"));
102 if (staff_pos == left_staff_pos)
104 Grob * p = new Spanner (get_property ("Tie"));
105 Tie::set_interface (p); // cannot remove yet!
107 Tie::set_head (p, LEFT, th);
108 Tie::set_head (p, RIGHT, h);
111 announce_grob(p, last_event_->self_scm());
118 Tie_engraver::process_acknowledged_grobs ()
120 if (ties_.size () > 1 && !tie_column_)
122 tie_column_ = new Spanner (get_property ("TieColumn"));
124 for (int i = ties_.size (); i--;)
125 Tie_column::add_tie (tie_column_,ties_ [i]);
127 announce_grob(tie_column_, SCM_EOL);
133 Tie_engraver::stop_translation_timestep ()
137 heads_to_tie_.clear ();
138 for (int i=0; i< ties_.size (); i++)
140 typeset_tie (ties_[i]);
147 typeset_grob (tie_column_);
154 heads_to_tie_ = now_heads_;
155 last_event_ = event_;
162 Tie_engraver::typeset_tie (Grob *her)
164 if (! (Tie::head (her,LEFT) && Tie::head (her,RIGHT)))
165 warning (_ ("lonely tie"));
168 Drul_array<Grob *> new_head_drul;
169 new_head_drul[LEFT] = Tie::head (her,LEFT);
170 new_head_drul[RIGHT] = Tie::head (her,RIGHT);
172 if (!Tie::head (her,d))
173 new_head_drul[d] = Tie::head (her, (Direction)-d);
174 } while (flip (&d) != LEFT);
176 index_set_cell (her->get_grob_property ("heads"), LEFT, new_head_drul[LEFT]->self_scm ());
177 index_set_cell (her->get_grob_property ("heads"), RIGHT, new_head_drul[RIGHT]->self_scm ());
183 ENTER_DESCRIPTION(Tie_engraver,
184 /* descr */ "Generate ties between noteheads of equal pitch.",
185 /* creats*/ "Tie TieColumn",
186 /* accepts */ "tie-event",
187 /* acks */ "rhythmic-head-interface",
188 /* reads */ "tieMelismaBusy",