/*
- change-iterator.cc -- implement
+ change-iterator.cc -- implement Change_iterator
source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "change-iterator.hh"
-#include "translator-group.hh"
-#include "change-translator.hh"
-Change_iterator::Change_iterator (Change_translator *change_l)
+#include "context.hh"
+#include "music.hh"
+#include "warn.hh"
+#include "input.hh"
+
+void
+Change_iterator::error (String reason)
{
- change_l_ = change_l;
+ String to_type = ly_symbol2string (get_music ()->get_property ("change-to-type"));
+ String to_id = ly_scm2string (get_music ()->get_property ("change-to-id"));
+
+ String warn1 = _f ("can't change `%s' to `%s'", to_type, to_id)
+ + ": " + reason;
+
+ /*
+ GUHG!
+ */
+ String warn2= "Change_iterator::process (): "
+ + get_outlet ()->context_name () + " = `"
+ + get_outlet ()->id_string () + "': ";
+ warning (warn2);
+ get_music ()->origin ()->warning (warn1);
}
/*
move to construct_children ?
*/
void
-Change_iterator::process_and_next (Moment m)
+Change_iterator::process (Moment m)
{
- Translator_group * current = report_to_l ();
- Translator_group * last = 0;
- while (current && current->type_str_ != change_l_->change_to_type_str_)
+ Context * current = get_outlet ();
+ Context * last = 0;
+
+ SCM to_type = get_music ()->get_property ("change-to-type");
+ String to_id = ly_scm2string (get_music ()->get_property ("change-to-id"));
+
+
+ /* find the type of translator that we're changing.
+
+ If \translator Staff = bass, then look for Staff = *
+ */
+ while (current && !current->is_alias (to_type))
{
last = current;
- current = current->daddy_trans_l_;
+ current = current->get_parent_context ();
}
- if (current)
+
+ if (current && current->id_string () == to_id)
{
- Translator_group * dest =
- report_to_l ()->find_create_translator_l (change_l_->change_to_type_str_,
- change_l_->change_to_id_str_);
- current->remove_translator_p (last);
- dest->add (last);
+ String msg;
+ msg += _ ("Can't switch translators, I'm there already");
}
- Music_iterator::process_and_next (m);
+ if (current)
+ if (last)
+ {
+ Context * dest = 0;
+ Context * where = get_outlet ();
+ while (!dest && where)
+ {
+ dest = find_context_below (where, to_type, to_id);
+ where = where->get_parent_context ();
+ }
+
+ if (dest)
+ {
+ current->remove_context (last);
+ dest->add_context (last);
+ }
+ else
+ {
+ get_music ()->origin ()->warning ("could not find context to switch to.");
+ }
+ }
+ else
+ {
+ /*
+ We could change the current translator's id, but that would make
+ errors hard to catch
+
+ last->translator_id_string () = get_change ()->change_to_id_string ();
+ */
+ error (_ ("I'm one myself"));
+ }
+ else
+ error (_ ("none of these in my family"));
+
+ Simple_music_iterator::process (m);
}
-IMPLEMENT_IS_TYPE_B1 (Change_iterator, Music_iterator);
+
+
+IMPLEMENT_CTOR_CALLBACK (Change_iterator);