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/*
This file is part of LilyPond, the GNU music typesetter.
Copyright (C) 1997--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 "engraver.hh"
#include "item.hh"
#include "melody-spanner.hh"
#include "pointer-group-interface.hh"
class Melody_engraver : public Engraver
{
Grob *melody_item_;
Grob *stem_;
protected:
void acknowledge_stem (Grob_info);
void acknowledge_slur (Grob_info);
TRANSLATOR_DECLARATIONS (Melody_engraver);
void stop_translation_timestep ();
void process_acknowledged ();
void process_music ();
};
Melody_engraver::Melody_engraver ()
{
stem_ = 0;
melody_item_ = 0;
}
void
Melody_engraver::process_music ()
{
if (scm_is_string (get_property ("whichBar")))
melody_item_ = 0;
}
/*
Used to be in stop_translation_timestep, but grobs can't
be created here.
*/
void
Melody_engraver::process_acknowledged ()
{
if (stem_
&& !is_direction (stem_->get_property_data ("neutral-direction")))
{
extract_grob_set (stem_, "rests", rests);
if (rests.size ())
melody_item_ = 0;
else
{
if (!melody_item_)
melody_item_ = make_item ("MelodyItem", stem_->self_scm ());
Melody_spanner::add_stem (melody_item_, stem_);
}
}
}
void
Melody_engraver::stop_translation_timestep ()
{
stem_ = 0;
}
void
Melody_engraver::acknowledge_slur (Grob_info /* info */)
{
melody_item_ = 0;
}
void
Melody_engraver::acknowledge_stem (Grob_info info)
{
stem_ = info.grob ();
}
#include "translator.icc"
void
Melody_engraver::boot ()
{
ADD_ACKNOWLEDGER (Melody_engraver, stem);
ADD_ACKNOWLEDGER (Melody_engraver, slur);
}
ADD_TRANSLATOR (Melody_engraver,
/* doc */
"Create information for context dependent typesetting"
" decisions.",
/* create */
"MelodyItem ",
/* read */
"",
/* write */
""
);
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