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/*
This file is part of LilyPond, the GNU music typesetter.
Copyright (C) 2000--2011 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/>.
*/
#include "engraver.hh"
#include "international.hh"
#include "pointer-group-interface.hh"
#include "rhythmic-head.hh"
#include "spanner.hh"
#include "stream-event.hh"
#include "warn.hh"
#include "item.hh"
#include "translator.icc"
class Glissando_engraver : public Engraver
{
public:
TRANSLATOR_DECLARATIONS (Glissando_engraver);
protected:
DECLARE_TRANSLATOR_LISTENER (glissando);
DECLARE_ACKNOWLEDGER (note_column);
virtual void finalize ();
void stop_translation_timestep ();
void process_music ();
private:
vector<Spanner *> lines_;
vector<Spanner *> kill_me_;
bool start_glissandi;
bool stop_glissandi;
Stream_event *event_;
vector<vsize> note_column_1;
vector<vsize> note_column_2;
};
Glissando_engraver::Glissando_engraver ()
{
event_ = 0;
start_glissandi = false;
stop_glissandi = false;
}
IMPLEMENT_TRANSLATOR_LISTENER (Glissando_engraver, glissando);
void
Glissando_engraver::listen_glissando (Stream_event *ev)
{
ASSIGN_EVENT_ONCE (event_, ev);
}
void
Glissando_engraver::process_music ()
{
if (event_)
start_glissandi = true;
}
void
Glissando_engraver::acknowledge_note_column (Grob_info info)
{
Grob *g = info.grob ();
if (stop_glissandi)
{
extract_grob_set (g, "note-heads", note_heads);
int glissando_index = 0;
for (vsize i = 0; i < note_column_1.size (); i++)
{
if (note_column_2[i] >= note_heads.size ())
{
kill_me_.push_back (lines_[i]);
announce_end_grob (lines_[i], SCM_EOL);
}
else
{
lines_[i]->set_bound (RIGHT, note_heads[note_column_2[i]]);
lines_[i]->set_property ("glissando-index", scm_from_int (glissando_index));
glissando_index++;
announce_end_grob (lines_[i], note_heads[note_column_2[i]]->self_scm ());
}
}
lines_.clear ();
note_column_1.clear ();
note_column_2.clear ();
stop_glissandi = false;
}
if (start_glissandi)
{
extract_grob_set (g, "note-heads", note_heads);
SCM map = get_property ("glissandoMap");
if (map == SCM_EOL)
for (vsize i = 0; i < note_heads.size (); i++)
{
note_column_1.push_back (i);
note_column_2.push_back (i);
}
else
for (SCM m = map; scm_is_pair (m); m = scm_cdr (m))
{
SCM candidate = scm_car (m);
if (!scm_is_pair (candidate))
continue;
int n1 = robust_scm2int (scm_car (candidate), -1);
int n2 = robust_scm2int (scm_cdr (candidate), -1);
if ((n1 < 0) || (n2 < 0) || (size_t(n1) >= note_heads.size ()))
continue;
note_column_1.push_back (vsize (n1));
note_column_2.push_back (vsize (n2));
}
for (vsize i = 0; i < note_column_1.size (); i++)
{
lines_.push_back (make_spanner ("Glissando", event_->self_scm ()));
lines_.back ()->set_bound (LEFT, note_heads[note_column_1[i]]);
}
}
}
void
Glissando_engraver::stop_translation_timestep ()
{
if (start_glissandi)
{
if (stop_glissandi)
programming_error ("overwriting glissando");
stop_glissandi = true;
start_glissandi = false;
}
event_ = 0;
}
void
Glissando_engraver::finalize ()
{
if (!lines_.empty ())
{
string msg = _ ("unterminated glissando");
if (event_)
event_->origin ()->warning (msg);
else
warning (msg);
for (vsize i = 0; i < lines_.size (); i++)
lines_[i]->suicide ();
}
for (vsize i = 0; i < kill_me_.size (); i++)
kill_me_[i]->suicide ();
}
ADD_ACKNOWLEDGER (Glissando_engraver, note_column);
ADD_TRANSLATOR (Glissando_engraver,
/* doc */
"Engrave glissandi.",
/* create */
"Glissando ",
/* read */
"glissandoMap ",
/* write */
""
);
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