-/*
- new-chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
-
+/*
+ chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
+
source file of the GNU LilyPond music typesetter
-
- (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-#include "engraver.hh"
+ (c) 2000--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
+
+#include "math.h" // ceil
+
#include "beam.hh"
+#include "chord-tremolo-iterator.hh"
+#include "engraver-group.hh"
+#include "international.hh"
+#include "item.hh"
+#include "misc.hh"
#include "repeated-music.hh"
-#include "stem.hh"
#include "rhythmic-head.hh"
-#include "engraver-group-engraver.hh"
-#include "event.hh"
-#include "warn.hh"
-#include "misc.hh"
-#include "note-head.hh"
#include "spanner.hh"
-#include "item.hh"
-#include "chord-tremolo-iterator.hh"
#include "stem-tremolo.hh"
-#include "music-list.hh"
-#include "math.h" // ceil
+#include "stem.hh"
+#include "warn.hh"
-/**
+#include "translator.icc"
- 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_;
+ Music *repeat_;
/// moment (global time) where beam started.
Moment start_mom_;
Moment stop_mom_;
- int flags_ ;
+ int flags_;
+ int total_duration_flags_;
+
/// location within measure where beam started.
Moment beam_start_location_;
- bool sequential_body_b_;
- Spanner * beam_;
- Spanner * finished_beam_;
- Item * stem_tremolo_;
+ bool body_is_sequential_;
+ Spanner *beam_;
+ Spanner *finished_beam_;
+ Item *stem_tremolo_;
protected:
virtual void finalize ();
- virtual bool try_music (Music*);
- virtual void acknowledge_grob (Grob_info);
- virtual void stop_translation_timestep ();
- virtual void start_translation_timestep ();
- virtual void process_music ();
+ virtual bool try_music (Music *);
+ void stop_translation_timestep ();
+ void start_translation_timestep ();
+ void process_music ();
+ DECLARE_ACKNOWLEDGER (stem);
};
Chord_tremolo_engraver::Chord_tremolo_engraver ()
{
- beam_ = finished_beam_ = 0;
- repeat_ =0;
+ beam_ = finished_beam_ = 0;
+ repeat_ = 0;
flags_ = 0;
stem_tremolo_ = 0;
- sequential_body_b_ = false;
+ body_is_sequential_ = false;
}
bool
-Chord_tremolo_engraver::try_music (Music * m)
+Chord_tremolo_engraver::try_music (Music *m)
{
- Repeated_music * rp = dynamic_cast<Repeated_music*> (m);
- if (rp
- && rp->get_mus_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
- && !repeat_)
+ if (m->is_mus_type ("repeated-music")
+ && m->get_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
+ && !repeat_)
{
- Moment l = rp->get_length ();
- repeat_ = rp;
+ Moment l = m->get_length ();
+ repeat_ = m;
start_mom_ = now_mom ();
stop_mom_ = start_mom_ + l;
- Sequential_music * seq = dynamic_cast<Sequential_music*> (rp->body ());
- sequential_body_b_ = seq;
+ Music *body = Repeated_music::body (m);
+ body_is_sequential_ = body->is_mus_type ("sequential-music");
- int elt_count = seq ? scm_ilength (seq-> music_list ()) : 1;
+ int elt_count = body_is_sequential_ ? scm_ilength (body->get_property ("elements")) : 1;
- if (elt_count != 2)
- {
- rp->origin ()->warning (_f ("Chord tremolo with %d elements. Must have two elements.", elt_count));
- }
+ if (body_is_sequential_ && elt_count != 2)
+ m->origin ()->warning (_f ("expect 2 elements for chord tremolo, found %d", elt_count));
if (elt_count <= 0)
elt_count = 1;
-
+
Rational total_dur = l.main_part_;
- Rational note_dur = total_dur / Rational (elt_count * repeat_->repeat_count ());
+ Rational note_dur = total_dur / Rational (elt_count * Repeated_music::repeat_count (repeat_));
+
+ total_duration_flags_ = max (0, (intlog2 (total_dur.den ()) - 2));
+
+ flags_ = intlog2 (note_dur.den ()) -2;
- if (total_dur < Rational (1,4))
- {
- /*
- This would require beams between flagged (8th) notes.
- */
- rp->origin ()->warning ("Chord tremolo is too short to denote properly.");
- }
-
- flags_ = intlog2 (note_dur.den ()) -2 ;
-
return true;
}
void
Chord_tremolo_engraver::process_music ()
{
- if (repeat_)
+ if (repeat_ && body_is_sequential_ && !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);
+
+ 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)
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- if (beam_ && Stem::has_interface (info.grob_))
+ if (beam_)
{
- Grob * s = info.grob_;
+ Grob *s = info.grob ();
- if (start_mom_ == now_mom())
+ 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));
- }
- s->set_grob_property ("direction", d);
+ beam_->set_property ("gap-count", scm_from_int (flags_ - total_duration_flags_));
- if (info.music_cause ()->is_mus_type ("rhythmic-event"))
- {
- Beam::add_stem (beam_, s);
- }
+ if (info.ultimate_music_cause ()->is_mus_type ("rhythmic-event"))
+ Beam::add_stem (beam_, s);
else
{
- String s = _ ("stem must have Rhythmic structure");
+ string s = _ ("stem must have Rhythmic structure");
if (info.music_cause ())
info.music_cause ()->origin ()->warning (s);
else
::warning (s);
}
}
- else if (stem_tremolo_ && Stem::has_interface (info.grob_))
+ else if (repeat_
+ && flags_
+ && !body_is_sequential_)
{
- 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_from_int (flags_));
+ stem_tremolo_->set_object ("stem",
+ info.grob ()->self_scm ());
+ stem_tremolo_->set_parent (info.grob (), X_AXIS);
+ info.grob ()->set_object ("tremolo-flag", stem_tremolo_->self_scm ());
}
}
-
void
Chord_tremolo_engraver::start_translation_timestep ()
{
}
}
-
void
Chord_tremolo_engraver::stop_translation_timestep ()
{
- typeset_beam ();
-
if (stem_tremolo_)
{
- typeset_grob (stem_tremolo_);
+ repeat_ = 0;
+ if (beam_)
+ programming_error ("beam and stem tremolo?");
stem_tremolo_ = 0;
}
-}
-
+ typeset_beam ();
+}
-ENTER_DESCRIPTION(Chord_tremolo_engraver,
-/* descr */ "Generates beams for tremolo repeats.",
-/* creats*/ "Beam",
-/* accepts */ "repeated-music",
-/* acks */ "stem-interface note-head-interface",
-/* reads */ "",
-/* write */ "");
+ADD_ACKNOWLEDGER (Chord_tremolo_engraver, stem);
+ADD_TRANSLATOR (Chord_tremolo_engraver,
+ /* doc */ "Generates beams for tremolo repeats.",
+ /* create */ "Beam",
+ /* accept */ "repeated-music",
+ /* read */ "",
+ /* write */ "");
projects / lilypond.git / blobdiff