+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2001--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+ 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 "grob.hh"
+#include "engraver.hh"
+
+class Font_size_engraver : public Engraver
+{
+
+ TRANSLATOR_DECLARATIONS (Font_size_engraver);
+protected:
+ DECLARE_ACKNOWLEDGER (font);
+ void process_music ();
+ Real size;
+private:
+};
+
+Font_size_engraver::Font_size_engraver ()
+{
+ size = 0.0;
+}
+
+void
+Font_size_engraver::process_music ()
+{
+ size = robust_scm2double (get_property ("fontSize"), 0.0);
+}
+
+void
+Font_size_engraver::acknowledge_font (Grob_info gi)
+{
+ /*
+ We only want to process a grob once.
+ */
+ if (!size)
+ return;
+
+ if (gi.context () != context ())
+ return;
+
+ Real font_size = size
+ + robust_scm2double (gi.grob ()->get_property ("font-size"), 0);
+ gi.grob ()->set_property ("font-size", scm_from_double (font_size));
+}
+
+#include "translator.icc"
+
+ADD_ACKNOWLEDGER (Font_size_engraver, font);
+ADD_TRANSLATOR (Font_size_engraver,
+ /* doc */
+ "Put @code{fontSize} into @code{font-size} grob property.",
+
+ /* create */
+ "",
+
+ /* read */
+ "fontSize ",
+
+ /* write */
+ ""
+ );