/*
- stem-grav.cc -- implement Stem_engraver
+ stem-engraver.cc -- implement Stem_engraver
source file of the GNU LilyPond music typesetter
#include "stem.hh"
/**
- Make stems upon receiving noteheads.
- */
+ Make stems upon receiving noteheads.
+*/
class Stem_engraver : public Engraver
{
Grob *stem_;
Grob *tremolo_;
Music *rhythmic_ev_;
Music *tremolo_ev_;
-
+
TRANSLATOR_DECLARATIONS (Stem_engraver);
protected:
void make_stem (Grob_info);
-
+
virtual void acknowledge_grob (Grob_info);
virtual void stop_translation_timestep ();
virtual bool try_music (Music *);
stem_ = make_item ("Stem", gi.music_cause ()->self_scm ());
/*
- docme: why do we take duration-log from request, not from note
- head?
- */
- int duration_log = gi.music_cause ()->duration_log ();
- stem_->set_property ("duration-log", scm_int2num (duration_log));
+ we take the duration log from the Event, since the duration-log
+ for a note head is always <= 2.
+ */
+ Music *music = gi.music_cause ();
+ Duration *dur = unsmob_duration (music->get_property ("duration"));
+
+ stem_->set_property ("duration-log", dur ? scm_int2num (dur->duration_log ()) : 0);
if (tremolo_ev_)
{
context ()->set_property ("tremoloFlags", scm_int2num (requested_type));
int tremolo_flags = intlog2 (requested_type) - 2
- - (duration_log > 2 ? duration_log - 2 : 0);
+ - (dur->duration_log () > 2 ? dur->duration_log () - 2 : 0);
if (tremolo_flags <= 0)
{
- tremolo_ev_->origin ()->warning (_("tremolo duration is too long"));
+ tremolo_ev_->origin ()->warning (_ ("tremolo duration is too long"));
tremolo_flags = 0;
}
tremolo_ = make_item ("StemTremolo", tremolo_ev_->self_scm ());
/* The number of tremolo flags is the number of flags of the
- tremolo-type minus the number of flags of the note itself. */
+ tremolo-type minus the number of flags of the note itself. */
tremolo_->set_property ("flag-count", scm_int2num (tremolo_flags));
tremolo_->set_parent (stem_, X_AXIS);
stem_->set_property ("tremolo-flag", tremolo_->self_scm ());
void
Stem_engraver::acknowledge_grob (Grob_info gi)
{
- if (Rhythmic_head::has_interface (gi.grob_))
+ if (Rhythmic_head::has_interface (gi.grob ()))
{
- if (Rhythmic_head::get_stem (gi.grob_))
+ if (Rhythmic_head::get_stem (gi.grob ()))
return;
- Music * cause = gi.music_cause ();
+ Music *cause = gi.music_cause ();
if (!cause)
+ return;
+ Duration *d = unsmob_duration (cause->get_property ("duration"));
+ if (!d)
return ;
if (!stem_)
make_stem (gi);
- int duration_log = cause->duration_log ();
- if (Stem::duration_log (stem_) != duration_log)
+ if (Stem::duration_log (stem_) != d->duration_log ())
{
// FIXME:
- gi.music_cause ()->origin ()->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << Stem::duration_log (stem_)));
-
- gi.music_cause ()->origin ()->warning (_f ("Don't you want polyphonic voices instead?"));
+ gi.music_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d)",
+ 1 << Stem::duration_log (stem_)));
+ gi.music_cause ()->origin ()->warning (_f ("maybe input should specify polyphonic voices"));
}
- Stem::add_head (stem_, gi.grob_);
+ Stem::add_head (stem_, gi.grob ());
}
}
}
ADD_TRANSLATOR (Stem_engraver,
-/* descr */ "Create stems and single-stem tremolos. It also works together with "
-"the beam engraver for overriding beaming.",
-/* creats*/ "Stem StemTremolo",
-/* accepts */ "tremolo-event",
-/* acks */ "rhythmic-head-interface",
-/* reads */ "tremoloFlags stemLeftBeamCount stemRightBeamCount",
-/* write */ "");
+ /* descr */ "Create stems and single-stem tremolos. It also works together with "
+ "the beam engraver for overriding beaming.",
+ /* creats*/ "Stem StemTremolo",
+ /* accepts */ "tremolo-event",
+ /* acks */ "rhythmic-head-interface",
+ /* reads */ "tremoloFlags stemLeftBeamCount stemRightBeamCount",
+ /* write */ "");