/*
- stem-engraver.cc -- implement Stem_engraver
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2006 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 "translator.icc"
-/**
- Make stems upon receiving noteheads.
-*/
class Stem_engraver : public Engraver
{
Grob *stem_;
stem needs a rhythmic structure to fit it into a beam. */
stem_ = make_item ("Stem", gi.grob ()->self_scm ());
- /*
- we take the duration log from the Event, since the duration-log
- for a note head is always <= 2.
- */
- Stream_event *ev = gi.event_cause ();
- Duration *dur = unsmob_duration (ev->get_property ("duration"));
-
- stem_->set_property ("duration-log", dur ? scm_from_int (dur->duration_log ()) : 0);
-
if (tremolo_ev_)
{
/* Stem tremolo is never applied to a note by default,
- is must me requested. But there is a default for the
+ it must be requested. But there is a default for the
tremolo value:
c4:8 c c:
- the first and last (quarter) note bothe get one tremolo flag. */
+ the first and last (quarter) note both get one tremolo flag. */
int requested_type
- = scm_to_int (tremolo_ev_->get_property ("tremolo-type"));
+ = robust_scm2int (tremolo_ev_->get_property ("tremolo-type"), 0);
SCM f = get_property ("tremoloFlags");
if (!requested_type)
{
else
context ()->set_property ("tremoloFlags", scm_from_int (requested_type));
+
+ /*
+ we take the duration log from the Event, since the duration-log
+ for a note head is always <= 2.
+ */
+ Stream_event *ev = gi.event_cause ();
+ Duration *dur = unsmob_duration (ev->get_property ("duration"));
+
int tremolo_flags = intlog2 (requested_type) - 2
- (dur->duration_log () > 2 ? dur->duration_log () - 2 : 0);
if (tremolo_flags <= 0)
// FIXME:
gi.event_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d)",
1 << Stem::duration_log (stem_)));
- gi.event_cause ()->origin ()->warning (_f ("maybe input should specify polyphonic voices"));
+ gi.event_cause ()->origin ()->warning (_ ("maybe input should specify polyphonic voices"));
}
Stem::add_head (stem_, gi.grob ());
void
Stem_engraver::listen_tremolo (Stream_event *ev)
{
- tremolo_ev_ = ev;
+ ASSIGN_EVENT_ONCE (tremolo_ev_, ev);
}
ADD_ACKNOWLEDGER (Stem_engraver, rhythmic_head);
ADD_TRANSLATOR (Stem_engraver,
- /* doc */ "Create stems and single-stem tremolos. It also works together with "
- "the beam engraver for overriding beaming.",
+ /* doc */
+ "Create stems and single-stem tremolos. It also works"
+ " together with the beam engraver for overriding beaming.",
+
/* create */
"Stem "
"StemTremolo ",
- /* accept */ "tremolo-event",
+
/* read */
"tremoloFlags "
"stemLeftBeamCount "
"stemRightBeamCount ",
- /* write */ "");
+
+ /* write */
+ ""
+ );