/*
- stem-grav.cc -- implement Stem_engraver
+ stem-engraver.cc -- implement Stem_engraver
source file of the GNU LilyPond music typesetter
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
+#include "engraver.hh"
+
#include "context.hh"
#include "directional-element-interface.hh"
-#include "engraver.hh"
-#include "event.hh"
+#include "duration.hh"
+#include "international.hh"
#include "item.hh"
#include "misc.hh"
#include "rhythmic-head.hh"
#include "staff-symbol-referencer.hh"
#include "stem-tremolo.hh"
#include "stem.hh"
+#include "stream-event.hh"
+#include "translator.icc"
-/**
- Make stems upon receiving noteheads.
- */
class Stem_engraver : public Engraver
{
- Grob *stem_;
+ Grob *stem_;
Grob *tremolo_;
- Music *rhythmic_ev_;
- Music* tremolo_ev_;
+ Stream_event *rhythmic_ev_;
+ Stream_event *tremolo_ev_;
+
TRANSLATOR_DECLARATIONS (Stem_engraver);
protected:
- void add_script (Grob *);
void make_stem (Grob_info);
- virtual void acknowledge_grob (Grob_info);
- virtual void stop_translation_timestep ();
- virtual bool try_music (Music *);
+
+ DECLARE_TRANSLATOR_LISTENER (tremolo);
+ DECLARE_ACKNOWLEDGER (rhythmic_head);
+ void stop_translation_timestep ();
};
Stem_engraver::Stem_engraver ()
tremolo_ev_ = 0;
stem_ = 0;
tremolo_ = 0;
- rhythmic_ev_ =0;
+ rhythmic_ev_ = 0;
}
void
{
/* Announce the cause of the head as cause of the stem. The
stem needs a rhythmic structure to fit it into a beam. */
- stem_ = make_item ("Stem", gi.music_cause ()->self_scm ());
-
- int duration_log = gi.music_cause ()->duration_log ();
- stem_->set_property ("duration-log", scm_int2num (duration_log));
+ stem_ = make_item ("Stem", gi.grob ()->self_scm ());
if (tremolo_ev_)
{
the first and last (quarter) note bothe get one tremolo flag. */
int requested_type
- = ly_scm2int (tremolo_ev_->get_property ("tremolo-type"));
+ = scm_to_int (tremolo_ev_->get_property ("tremolo-type"));
SCM f = get_property ("tremoloFlags");
if (!requested_type)
{
- if (ly_c_number_p (f))
- requested_type = ly_scm2int (f);
+ if (scm_is_number (f))
+ requested_type = scm_to_int (f);
else
requested_type = 8;
}
else
- context ()->set_property ("tremoloFlags", scm_int2num (requested_type));
+ 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
- - (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_->set_property ("flag-count", scm_int2num (tremolo_flags));
+ tremolo-type minus the number of flags of the note itself. */
+ tremolo_->set_property ("flag-count", scm_from_int (tremolo_flags));
tremolo_->set_parent (stem_, X_AXIS);
- stem_->set_property ("tremolo-flag", tremolo_->self_scm ());
- tremolo_->set_property ("stem", stem_->self_scm ());
+ stem_->set_object ("tremolo-flag", tremolo_->self_scm ());
+ tremolo_->set_object ("stem", stem_->self_scm ());
}
}
}
void
-Stem_engraver::add_script (Grob *script)
+Stem_engraver::acknowledge_rhythmic_head (Grob_info gi)
{
- Direction d = get_grob_direction (script);
- if (d == UP || d == DOWN)
- {
- char const *property = d == UP ? "script-up" : "script-down";
- stem_->set_property (property,
- scm_cons (script->self_scm (),
- stem_->get_property (property)));
- }
-}
+ if (Rhythmic_head::get_stem (gi.grob ()))
+ return;
-void
-Stem_engraver::acknowledge_grob (Grob_info gi)
-{
- if (Rhythmic_head::has_interface (gi.grob_))
- {
- if (Rhythmic_head::get_stem (gi.grob_))
- return;
-
- if (!stem_)
- make_stem (gi);
-
- int duration_log = gi.music_cause ()->duration_log ();
- if (Stem::duration_log (stem_) != 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?"));
- }
+ Stream_event *cause = gi.event_cause ();
+ if (!cause)
+ return;
+ Duration *d = unsmob_duration (cause->get_property ("duration"));
+ if (!d)
+ return;
- Stem::add_head (stem_, gi.grob_);
+ if (!stem_)
+ make_stem (gi);
+
+ if (Stem::duration_log (stem_) != d->duration_log ())
+ {
+ // 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 (_ ("maybe input should specify polyphonic voices"));
}
- else if (Script_interface::has_interface (gi.grob_))
- add_script (gi.grob_);
+
+ Stem::add_head (stem_, gi.grob ());
}
void
{
/* FIXME: junk these properties. */
SCM prop = get_property ("stemLeftBeamCount");
- if (ly_c_number_p (prop))
+ if (scm_is_number (prop))
{
- Stem::set_beaming (stem_,ly_scm2int (prop),LEFT);
+ Stem::set_beaming (stem_, scm_to_int (prop), LEFT);
context ()->unset_property (ly_symbol2scm ("stemLeftBeamCount"));
}
prop = get_property ("stemRightBeamCount");
- if (ly_c_number_p (prop))
+ if (scm_is_number (prop))
{
- Stem::set_beaming (stem_,ly_scm2int (prop), RIGHT);
+ Stem::set_beaming (stem_, scm_to_int (prop), RIGHT);
context ()->unset_property (ly_symbol2scm ("stemRightBeamCount"));
}
stem_ = 0;
tremolo_ev_ = 0;
}
-bool
-Stem_engraver::try_music (Music *m)
+IMPLEMENT_TRANSLATOR_LISTENER (Stem_engraver, tremolo);
+void
+Stem_engraver::listen_tremolo (Stream_event *ev)
{
- if (m->is_mus_type ("tremolo-event"))
- {
- tremolo_ev_ = m;
- return true;
- }
- return false;
+ ASSIGN_EVENT_ONCE (tremolo_ev_, ev);
}
-ENTER_DESCRIPTION (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 */ "");
+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.",
+
+ /* create */
+ "Stem "
+ "StemTremolo ",
+
+ /* read */
+ "tremoloFlags "
+ "stemLeftBeamCount "
+ "stemRightBeamCount ",
+
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff