/*
- instrument-switch-engraver.cc -- implement
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2006--2015 Han-Wen Nienhuys <hanwen@lilypond.org>
- (c) 2006--2007 Han-Wen Nienhuys <hanwen@lilypond.org>
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "engraver.hh"
#include "item.hh"
-#include "translator.icc"
+#include "text-interface.hh"
+#include "translator.icc"
class Instrument_switch_engraver : public Engraver
{
void stop_translation_time_step ();
void process_music ();
+
+ virtual void derived_mark () const;
};
+void
+Instrument_switch_engraver::derived_mark () const
+{
+ scm_gc_mark (cue_name_);
+}
Instrument_switch_engraver::Instrument_switch_engraver ()
{
Instrument_switch_engraver::process_music ()
{
SCM cue_text = get_property ("instrumentCueName");
-
+
if (!scm_is_eq (cue_name_, cue_text))
{
- text_ = make_item ("InstrumentSwitch", SCM_EOL);
- text_->set_property ("text", cue_text);
+ if (Text_interface::is_markup (cue_text))
+ {
+ text_ = make_item ("InstrumentSwitch", SCM_EOL);
+ text_->set_property ("text", cue_text);
+ }
cue_name_ = cue_text;
}
}
}
ADD_TRANSLATOR (Instrument_switch_engraver,
- /* doc */
- "Create a cue text for taking instrument.",
-
- /* create */
- "InstrumentSwitch ",
-
- /* read */
- "instrumentCueName ",
-
- /* write */
- ""
- );
+ /* doc */
+ "Create a cue text for taking instrument.",
+
+ /* create */
+ "InstrumentSwitch ",
+
+ /* read */
+ "instrumentCueName ",
+
+ /* write */
+ ""
+ );