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/*
This file is part of LilyPond, the GNU music typesetter.
Copyright (C) 2000--2015 Jan Nieuwenhuizen <janneke@gnu.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/>.
*/
/*
C&P from text-spanner.cc
- todo: ending should be detected automatically? a new note
automatically is the end of the trill?
*/
#include "engraver.hh"
#include "international.hh"
#include "note-column.hh"
#include "pointer-group-interface.hh"
#include "side-position-interface.hh"
#include "stream-event.hh"
#include "spanner.hh"
#include "translator.icc"
class Trill_spanner_engraver : public Engraver
{
public:
TRANSLATOR_DECLARATIONS (Trill_spanner_engraver);
protected:
virtual void finalize ();
void listen_trill_span (Stream_event *);
void acknowledge_note_column (Grob_info);
void stop_translation_timestep ();
void process_music ();
private:
Spanner *span_;
Spanner *finished_;
Stream_event *current_event_;
Drul_array<Stream_event *> event_drul_;
void typeset_all ();
};
Trill_spanner_engraver::Trill_spanner_engraver ()
{
finished_ = 0;
current_event_ = 0;
span_ = 0;
event_drul_.set (0, 0);
}
void
Trill_spanner_engraver::listen_trill_span (Stream_event *ev)
{
Direction d = to_dir (ev->get_property ("span-direction"));
ASSIGN_EVENT_ONCE (event_drul_[d], ev);
}
void
Trill_spanner_engraver::acknowledge_note_column (Grob_info info)
{
if (span_)
{
Pointer_group_interface::add_grob (span_,
ly_symbol2scm ("note-columns"),
info.grob ());
if (!span_->get_bound (LEFT))
add_bound_item (span_, info.grob ());
}
else if (finished_)
{
Pointer_group_interface::add_grob (finished_, ly_symbol2scm ("note-columns"),
info.grob ());
if (!finished_->get_bound (RIGHT))
add_bound_item (finished_, info.grob ());
}
}
void
Trill_spanner_engraver::process_music ()
{
if (span_
&& (event_drul_[STOP] || event_drul_[START]))
{
Stream_event *ender = event_drul_[STOP];
if (!ender)
ender = event_drul_[START];
finished_ = span_;
announce_end_grob (finished_, ender->self_scm ());
span_ = 0;
current_event_ = 0;
}
if (event_drul_[START])
{
current_event_ = event_drul_[START];
span_ = make_spanner ("TrillSpanner", event_drul_[START]->self_scm ());
Side_position_interface::set_axis (span_, Y_AXIS);
}
}
void
Trill_spanner_engraver::typeset_all ()
{
if (finished_)
{
if (!finished_->get_bound (RIGHT))
{
Grob *e = unsmob<Grob> (get_property ("currentMusicalColumn"));
finished_->set_bound (RIGHT, e);
}
finished_ = 0;
}
}
void
Trill_spanner_engraver::stop_translation_timestep ()
{
if (span_ && !span_->get_bound (LEFT))
{
Grob *e = unsmob<Grob> (get_property ("currentMusicalColumn"));
span_->set_bound (LEFT, e);
}
typeset_all ();
event_drul_.set (0, 0);
}
void
Trill_spanner_engraver::finalize ()
{
typeset_all ();
if (span_)
{
Grob *e = unsmob<Grob> (get_property ("currentCommandColumn"));
span_->set_bound (RIGHT, e);
}
}
void
Trill_spanner_engraver::boot ()
{
ADD_LISTENER (Trill_spanner_engraver, trill_span);
ADD_ACKNOWLEDGER (Trill_spanner_engraver, note_column);
}
ADD_TRANSLATOR (Trill_spanner_engraver,
/* doc */
"Create trill spanner from an event.",
/* create */
"TrillSpanner ",
/* read */
"currentCommandColumn "
"currentMusicalColumn ",
/* write */
""
);
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