2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
22 #include "duration.hh"
23 #include "engraver.hh"
24 #include "international.hh"
27 #include "note-column.hh"
28 #include "paper-column.hh"
30 #include "rest-collision.hh"
31 #include "rhythmic-head.hh"
32 #include "stream-event.hh"
35 #include "translator.icc"
37 class Rest_collision_engraver : public Engraver
40 Grob *rest_collision_;
42 void process_acknowledged ();
43 void stop_translation_timestep ();
45 TRANSLATOR_DECLARATIONS (Rest_collision_engraver);
48 Rest_collision_engraver::Rest_collision_engraver (Context *c)
55 Rest_collision_engraver::process_acknowledged ()
59 Moment now = now_mom ();
61 for (SCM s = get_property ("busyGrobs"); scm_is_pair (s); s = scm_cdr (s))
63 Grob *g = unsmob<Grob> (scm_cdar (s));
64 Moment *m = unsmob<Moment> (scm_caar (s));
68 if (has_interface<Rhythmic_head> (g) && (*m) > now)
70 Grob *column = g->get_parent (X_AXIS);
74 // Only include rests that start now. Include notes that started any time.
75 Paper_column *paper_column = dynamic_cast<Item *> (column)->get_column ();
76 if (!has_interface<Rest> (g) || !paper_column || Paper_column::when_mom (paper_column) == now)
78 columns.insert (column);
79 rest_count += Note_column::has_rests (column);
84 if (!rest_collision_ && rest_count && columns.size () > 1)
86 rest_collision_ = make_item ("RestCollision", SCM_EOL);
87 for (set<Grob *>::iterator i = columns.begin (); i != columns.end (); ++i)
88 Rest_collision::add_column (rest_collision_, *i);
93 Rest_collision_engraver::stop_translation_timestep ()
99 Rest_collision_engraver::boot ()
104 ADD_TRANSLATOR (Rest_collision_engraver,
106 "Handle collisions of rests.",