/*
- new-chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
+ new-chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
- source file of the GNU LilyPond music typesetter
+ source file of the GNU LilyPond music typesetter
- (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- */
+*/
#include "engraver.hh"
#include "beam.hh"
#include "stem.hh"
#include "rhythmic-head.hh"
#include "engraver-group-engraver.hh"
-#include "musical-request.hh"
+#include "event.hh"
#include "warn.hh"
#include "misc.hh"
#include "note-head.hh"
#include "math.h" // ceil
/**
- This acknowledges repeated music with "tremolo" style. It typesets
- a beam.
- TODO:
+This acknowledges repeated music with "tremolo" style. It typesets
+a beam.
- - perhaps use engraver this to steer other engravers? That would
- create dependencies between engravers, which is bad.
+TODO:
- - create dots if appropriate.
+- perhaps use engraver this to steer other engravers? That would
+create dependencies between engravers, which is bad.
- - create TremoloBeam iso Beam?
- */
+- create dots if appropriate.
+- create TremoloBeam iso Beam?
+
+*/
class Chord_tremolo_engraver : public Engraver
{
void typeset_beam ();
-TRANSLATOR_DECLARATIONS(Chord_tremolo_engraver);
+ TRANSLATOR_DECLARATIONS (Chord_tremolo_engraver);
protected:
Repeated_music * repeat_;
Moment start_mom_;
Moment stop_mom_;
int flags_ ;
+ int total_duration_flags_;
+
/// location within measure where beam started.
Moment beam_start_location_;
{
Repeated_music * rp = dynamic_cast<Repeated_music*> (m);
if (rp
- && rp->get_mus_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
+ && rp->get_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
&& !repeat_)
{
- Moment l = rp->length_mom ();
+ Moment l = rp->get_length ();
repeat_ = rp;
start_mom_ = now_mom ();
stop_mom_ = start_mom_ + l;
- sequential_body_b_ = dynamic_cast<Sequential_music*> (rp->body ());
+ Sequential_music * seq = dynamic_cast<Sequential_music*> (rp->body ());
+ sequential_body_b_ = seq;
+
+ int elt_count = seq ? scm_ilength (seq-> music_list ()) : 1;
+
+ if (seq && elt_count != 2)
+ {
+ rp->origin ()->warning (_f ("Chord tremolo with %d elements. Must have two elements.", elt_count));
+ }
+
+ if (elt_count <= 0)
+ elt_count = 1;
+
Rational total_dur = l.main_part_;
- Rational note_dur = (total_dur / Rational (repeat_->repeat_count ()));
- flags_ = intlog2 ((total_dur / note_dur).num ());
+ Rational note_dur = total_dur / Rational (elt_count * repeat_->repeat_count ());
+
+ total_duration_flags_ = 0 >? (intlog2 (total_dur.den ()) - 2);
+
+ flags_ = intlog2 (note_dur.den ()) -2 ;
return true;
}
void
Chord_tremolo_engraver::process_music ()
{
- if (repeat_)
+ if (repeat_ && sequential_body_b_ && !beam_)
{
- if (sequential_body_b_ && !beam_)
- {
- beam_ = new Spanner (get_property ("Beam"));
- beam_->set_grob_property ("chord-tremolo", SCM_BOOL_T);
-
- SCM smp = get_property ("measurePosition");
- Moment mp
- = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
- beam_start_location_ = mp;
- announce_grob(beam_, repeat_->self_scm());
- }
- else if (!sequential_body_b_ && !stem_tremolo_)
- {
-
- if (flags_)
- {
- stem_tremolo_ = new Item (get_property ("StemTremolo"));
- announce_grob(stem_tremolo_, repeat_->self_scm());
- stem_tremolo_->set_grob_property ("flag-count",
- scm_int2num (flags_));
+ beam_ = make_spanner ("Beam", repeat_->self_scm ());
+ beam_->set_property ("chord-tremolo", SCM_BOOL_T);
- }
- }
+ SCM smp =
+ beam_start_location_ = robust_scm2moment (get_property ("measurePosition"), Moment (0));
}
}
+
void
Chord_tremolo_engraver::finalize ()
{
void
Chord_tremolo_engraver::typeset_beam ()
{
- if (finished_beam_)
- {
- typeset_grob (finished_beam_);
- finished_beam_ = 0;
- }
+ finished_beam_ = 0;
}
-
void
Chord_tremolo_engraver::acknowledge_grob (Grob_info info)
{
if (beam_ && Stem::has_interface (info.grob_))
{
Grob * s = info.grob_;
- Stem::set_beaming (s, flags_, LEFT);
- Stem::set_beaming (s, flags_, RIGHT);
+
+ if (start_mom_ == now_mom ())
+ Stem::set_beaming (s, flags_, RIGHT);
+ else
+ Stem::set_beaming (s, flags_, LEFT);
- SCM d = s->get_grob_property ("direction");
if (Stem::duration_log (s) != 1)
{
- beam_->set_grob_property ("gap", gh_double2scm (0.8));
+ beam_->set_property ("gap-count", scm_int2num (flags_ - total_duration_flags_));
}
- s->set_grob_property ("direction", d);
- if (dynamic_cast <Rhythmic_req *> (info.music_cause ()))
+ if (info.music_cause ()->is_mus_type ("rhythmic-event"))
{
Beam::add_stem (beam_, s);
}
::warning (s);
}
}
- else if (stem_tremolo_ && Stem::has_interface (info.grob_))
+ else if (repeat_ &&
+ flags_ && !sequential_body_b_ && Stem::has_interface (info.grob_))
{
- Stem_tremolo::set_stem (stem_tremolo_, info.grob_);
- stem_tremolo_->set_parent (info.grob_,X_AXIS);
+ stem_tremolo_ = make_item ("StemTremolo", repeat_->self_scm ());
+ stem_tremolo_->set_property ("flag-count",
+ scm_int2num (flags_));
+ stem_tremolo_->set_property ("stem",
+ info.grob_->self_scm ());
+ stem_tremolo_->set_parent (info.grob_, X_AXIS);
}
}
if (beam_ && stop_mom_ == now_mom ())
{
finished_beam_ = beam_;
-
repeat_ = 0;
beam_ = 0;
}
void
Chord_tremolo_engraver::stop_translation_timestep ()
{
- typeset_beam ();
-
if (stem_tremolo_)
{
- typeset_grob (stem_tremolo_);
+ repeat_ = 0;
+ if (beam_)
+ programming_error ("Huh, beam and stem tremolo?");
stem_tremolo_ = 0;
}
-
+
+ typeset_beam ();
}
-ENTER_DESCRIPTION(Chord_tremolo_engraver,
+ENTER_DESCRIPTION (Chord_tremolo_engraver,
/* descr */ "Generates beams for tremolo repeats.",
/* creats*/ "Beam",
-/* accepts */ "general-music",
+/* accepts */ "repeated-music",
/* acks */ "stem-interface note-head-interface",
/* reads */ "",
/* write */ "");
projects / lilypond.git / blobdiff