2 change-iterator.cc -- implement Change_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "change-iterator.hh"
10 #include "translator-group.hh"
17 Change_iterator::error (String reason)
19 String to_type = ly_scm2string (get_music ()->get_mus_property ("change-to-type"));
20 String to_id = ly_scm2string (get_music ()->get_mus_property ("change-to-id"));
22 String warn1 = _f ("can't change `%s' to `%s'", to_type, to_id)
27 String warn2= "Change_iterator::process (): "
28 + report_to ()->type_string_ + " = `"
29 + report_to ()->id_string_ + "': ";
31 get_music ()->origin ()->warning (warn1);
35 move to construct_children ?
38 Change_iterator::process (Moment m)
40 Translator_group * current = report_to ();
41 Translator_group * last = 0;
43 String to_type = ly_scm2string (get_music ()->get_mus_property ("change-to-type"));
44 String to_id = ly_scm2string (get_music ()->get_mus_property ("change-to-id"));
47 /* find the type of translator that we're changing.
49 If \translator Staff = bass, then look for Staff = *
51 while (current && current->type_string_ != to_type)
54 current = current->daddy_trans_;
57 if (current && current->id_string_ == to_id)
60 msg += _ ("Can't switch translators, I'm there already");
66 Translator_group * dest =
67 report_to ()->find_create_translator (to_type, to_id);
68 current->remove_translator (last);
69 dest->add_used_group_translator (last);
74 We could change the current translator's id, but that would make
77 last->translator_id_string_ = get_change ()->change_to_id_string_;
79 error (_ ("I'm one myself"));
82 error (_ ("none of these in my family"));
83 Simple_music_iterator::process (m);
88 IMPLEMENT_CTOR_CALLBACK (Change_iterator);