2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1999--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/>.
20 #include "change-iterator.hh"
22 #include "direction.hh"
23 #include "international.hh"
25 #include "music-wrapper-iterator.hh"
27 class Auto_change_iterator : public Music_wrapper_iterator
30 DECLARE_SCHEME_CALLBACK (constructor, ());
32 Auto_change_iterator ();
35 virtual void do_quit ();
36 virtual void construct_children ();
37 virtual void process (Moment);
38 vector<Pitch> pending_pitch (Moment) const;
49 Auto_change_iterator::process (Moment m)
51 Music_wrapper_iterator::process (m);
53 Moment now = get_outlet ()->now_mom ();
55 if (start_moment_.main_part_.is_infinity () && start_moment_ < 0)
58 for (; scm_is_pair (split_list_); split_list_ = scm_cdr (split_list_))
60 splitm = unsmob<Moment> (scm_caar (split_list_));
61 if ((*splitm + start_moment_) > now)
64 SCM tag = scm_cdar (split_list_);
65 Direction d = to_dir (tag);
67 if (d && d != where_dir_)
70 string to_id = (d >= 0) ? "up" : "down";
71 // N.B. change_to() returns an error message. Silence is the legacy
72 // behavior here, but maybe that should be changed.
73 Change_iterator::change_to (*child_iter_,
74 ly_symbol2scm ("Staff"),
80 Auto_change_iterator::Auto_change_iterator ()
83 split_list_ = SCM_EOL;
87 Auto_change_iterator::construct_children ()
89 split_list_ = get_music ()->get_property ("split-list");
90 start_moment_ = get_outlet ()->now_mom ();
92 SCM props = get_outlet ()->get_property ("trebleStaffProperties");
93 Context *up = get_outlet ()->find_create_context (ly_symbol2scm ("Staff"),
96 props = get_outlet ()->get_property ("bassStaffProperties");
97 Context *down = get_outlet ()->find_create_context (ly_symbol2scm ("Staff"),
100 up_.set_context (up);
101 down_.set_context (down);
103 Context *voice = up->find_create_context (ly_symbol2scm ("Voice"),
106 Music_wrapper_iterator::construct_children ();
110 Auto_change_iterator::do_quit ()
113 down_.set_context (0);
116 IMPLEMENT_CTOR_CALLBACK (Auto_change_iterator);