2 new-tie-engraver.cc -- implement Tie_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
15 #include "tie-column.hh"
16 #include "engraver.hh"
18 #include "grob-pitch-tuple.hh"
20 #include "note-head.hh"
21 #include "staff-symbol-referencer.hh"
24 Manufacture ties. Acknowledge noteheads, and put them into a
25 priority queue. If we have a TieEvent, connect the notes that finish
26 just at this time, and note that start at this time.
28 TODO: Remove the dependency on musical info. We should tie on the
29 basis of position and duration-log of the heads (not of the events).
31 TODO: support sparseTies.
33 TODO: melismata will fuck up now:
38 melisma is after the 2nd 8th note, but will now be signaled as
39 lasting till the 3rd 16th.
41 class Tie_engraver : public Engraver
45 Link_array<Grob> now_heads_;
46 Link_array<Grob> heads_to_tie_;
47 Link_array<Grob> ties_;
49 Spanner * tie_column_;
52 virtual void stop_translation_timestep ();
53 virtual void start_translation_timestep ();
54 virtual void acknowledge_grob (Grob_info);
55 virtual bool try_music (Music*);
56 virtual void process_music ();
57 void typeset_tie (Grob*);
59 TRANSLATOR_DECLARATIONS(Tie_engraver);
64 Tie_engraver::Tie_engraver ()
73 Tie_engraver::try_music (Music *mus)
75 if (mus->is_mus_type ("tie-event"))
84 Tie_engraver::process_music ()
87 daddy_context_->set_property ("tieMelismaBusy", SCM_BOOL_T);
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 Music * right_mus = unsmob_music (h->get_property ("cause"));
101 Music * left_mus = unsmob_music (th->get_property ("cause"));
104 maybe should check positions too.
106 if (right_mus && left_mus
107 && gh_equal_p (right_mus->get_property ("pitch"),
108 left_mus->get_property ("pitch")))
110 Grob * p = make_spanner ("Tie");
111 Tie::set_interface (p); // cannot remove yet!
113 Tie::set_head (p, LEFT, th);
114 Tie::set_head (p, RIGHT, h);
117 announce_grob(p, last_event_->self_scm());
121 if (ties_.size () && ! tie_column_)
123 tie_column_ = make_spanner ("TieColumn");
124 announce_grob(tie_column_, SCM_EOL);
128 for (int i = ties_.size (); i--;)
129 Tie_column::add_tie (tie_column_,ties_ [i]);
134 Tie_engraver::start_translation_timestep ()
136 daddy_context_->set_property ("tieMelismaBusy",
137 gh_bool2scm (heads_to_tie_.size ()));
142 Tie_engraver::stop_translation_timestep ()
146 heads_to_tie_.clear ();
147 for (int i=0; i< ties_.size (); i++)
149 typeset_tie (ties_[i]);
156 typeset_grob (tie_column_);
163 heads_to_tie_ = now_heads_;
164 last_event_ = event_;
171 Tie_engraver::typeset_tie (Grob *her)
173 if (! (Tie::head (her,LEFT) && Tie::head (her,RIGHT)))
174 warning (_ ("lonely tie"));
177 Drul_array<Grob *> new_head_drul;
178 new_head_drul[LEFT] = Tie::head (her,LEFT);
179 new_head_drul[RIGHT] = Tie::head (her,RIGHT);
181 if (!Tie::head (her,d))
182 new_head_drul[d] = Tie::head (her, (Direction)-d);
183 } while (flip (&d) != LEFT);
185 index_set_cell (her->get_property ("head-pair"), LEFT, new_head_drul[LEFT]->self_scm ());
186 index_set_cell (her->get_property ("head-pair"), RIGHT, new_head_drul[RIGHT]->self_scm ());
192 ENTER_DESCRIPTION(Tie_engraver,
193 /* descr */ "Generate ties between noteheads of equal pitch.",
194 /* creats*/ "Tie TieColumn",
195 /* accepts */ "tie-event",
196 /* acks */ "rhythmic-head-interface",
197 /* reads */ "tieMelismaBusy",