2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1999--2011 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/>.
21 #include "direction.hh"
22 #include "international.hh"
24 #include "music-wrapper-iterator.hh"
26 class Auto_change_iterator
: public Music_wrapper_iterator
29 DECLARE_SCHEME_CALLBACK (constructor
, ());
31 Auto_change_iterator ();
34 virtual void do_quit ();
35 virtual void construct_children ();
36 virtual void process (Moment
);
37 vector
<Pitch
> pending_pitch (Moment
) const;
41 void change_to (Music_iterator
*, SCM
, string
);
49 Auto_change_iterator::change_to (Music_iterator
*it
, SCM to_type_sym
,
52 Context
*current
= it
->get_outlet ();
56 Cut & Paste from Change_iterator (ugh).
58 TODO: abstract this function
61 /* find the type of translator that we're changing.
63 If \translator Staff = bass, then look for Staff = *
65 while (current
&& !current
->is_alias (to_type_sym
))
68 current
= current
->get_parent_context ();
71 if (current
&& current
->id_string () == to_id
)
74 msg
+= _f ("cannot change, already in translator: %s", to_id
);
82 = it
->get_outlet ()->find_create_context (to_type_sym
, to_id
, SCM_EOL
);
84 send_stream_event (last
, "ChangeParent", get_music ()->origin (),
85 ly_symbol2scm ("context"), dest
->self_scm ());
90 We could change the current translator's id, but that would make
100 Auto_change_iterator::process (Moment m
)
102 Music_wrapper_iterator::process (m
);
104 Moment now
= get_outlet ()->now_mom ();
106 if (start_moment_
.main_part_
.is_infinity () && start_moment_
< 0)
109 for (; scm_is_pair (split_list_
); split_list_
= scm_cdr (split_list_
))
111 splitm
= unsmob_moment (scm_caar (split_list_
));
112 if ((*splitm
+ start_moment_
) > now
)
115 SCM tag
= scm_cdar (split_list_
);
116 Direction d
= to_dir (tag
);
118 if (d
&& d
!= where_dir_
)
121 string to_id
= (d
>= 0) ? "up" : "down";
122 change_to (child_iter_
,
123 ly_symbol2scm ("Staff"),
129 Auto_change_iterator::Auto_change_iterator ()
132 split_list_
= SCM_EOL
;
136 Auto_change_iterator::construct_children ()
138 split_list_
= get_music ()->get_property ("split-list");
139 start_moment_
= get_outlet ()->now_mom ();
141 SCM props
= get_outlet ()->get_property ("trebleStaffProperties");
142 Context
*up
= get_outlet ()->find_create_context (ly_symbol2scm ("Staff"),
145 props
= get_outlet ()->get_property ("bassStaffProperties");
146 Context
*down
= get_outlet ()->find_create_context (ly_symbol2scm ("Staff"),
149 up_
.set_context (up
);
150 down_
.set_context (down
);
152 Context
*voice
= up
->find_create_context (ly_symbol2scm ("Voice"),
155 Music_wrapper_iterator::construct_children ();
159 Auto_change_iterator::do_quit ()
162 down_
.set_context (0);
165 IMPLEMENT_CTOR_CALLBACK (Auto_change_iterator
);