-/*
- 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--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-#include "engraver.hh"
+ (c) 2000--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Erik Sandberg <mandolaerik@gmail.com>
+*/
+
#include "beam.hh"
+#include "engraver-group.hh"
+#include "international.hh"
+#include "item.hh"
+#include "math.h" // ceil
+#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 "stream-event.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);
protected:
- Repeated_music * repeat_;
-
- /// moment (global time) where beam started.
- Moment start_mom_;
- Moment stop_mom_;
- 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_;
+ Stream_event *repeat_;
+
+ int flags_;
+ // number of beams for short tremolos
+ int expected_beam_count_;
+ // current direction of beam (first RIGHT, then LEFT)
+ Direction beam_dir_;
+
+ Spanner *beam_;
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 ();
+ void process_music ();
+ DECLARE_TRANSLATOR_LISTENER (tremolo_span);
+ DECLARE_ACKNOWLEDGER (stem);
};
Chord_tremolo_engraver::Chord_tremolo_engraver ()
{
- beam_ = finished_beam_ = 0;
- repeat_ =0;
+ beam_ = 0;
+ repeat_ = 0;
flags_ = 0;
- stem_tremolo_ = 0;
- sequential_body_b_ = false;
+ expected_beam_count_ = 0;
+ beam_dir_ = CENTER;
}
-bool
-Chord_tremolo_engraver::try_music (Music * m)
+IMPLEMENT_TRANSLATOR_LISTENER (Chord_tremolo_engraver, tremolo_span);
+void
+Chord_tremolo_engraver::listen_tremolo_span (Stream_event *ev)
{
- Repeated_music * rp = dynamic_cast<Repeated_music*> (m);
- if (rp
- && rp->get_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
- && !repeat_)
+ Direction span_dir = to_dir (ev->get_property ("span-direction"));
+ if (span_dir == START)
{
- Moment l = rp->get_length ();
- repeat_ = rp;
- start_mom_ = now_mom ();
- stop_mom_ = start_mom_ + l;
-
- 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)
+ if (ASSIGN_EVENT_ONCE (repeat_, ev))
{
- rp->origin ()->warning (_f ("Chord tremolo with %d elements. Must have two elements.", elt_count));
+ int type = scm_to_int (ev->get_property ("tremolo-type"));
+ /* e.g. 1 for type 8, 2 for type 16 */
+ flags_ = intlog2 (type) - 2;
+ expected_beam_count_ = scm_to_int (ev->get_property ("expected-beam-count"));
+ beam_dir_ = RIGHT;
}
-
- if (elt_count <= 0)
- elt_count = 1;
-
- Rational total_dur = l.main_part_;
- 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;
}
-
- return false;
+ else if (span_dir == STOP)
+ {
+ if (!repeat_)
+ ev->origin ()->warning (_ ("No tremolo to end"));
+ repeat_ = 0;
+ beam_ = 0;
+ expected_beam_count_ = 0;
+ beam_dir_ = CENTER;
+ }
}
void
Chord_tremolo_engraver::process_music ()
{
- if (repeat_ && sequential_body_b_ && !beam_)
+ if (repeat_ && !beam_)
{
beam_ = make_spanner ("Beam", repeat_->self_scm ());
- beam_->set_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;
}
}
void
Chord_tremolo_engraver::finalize ()
{
- typeset_beam ();
if (beam_)
{
repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
+ announce_end_grob (beam_, SCM_EOL);
beam_->suicide ();
}
}
void
-Chord_tremolo_engraver::typeset_beam ()
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- if (finished_beam_)
+ if (beam_)
{
- typeset_grob (finished_beam_);
- finished_beam_ = 0;
- }
-}
+ Grob *s = info.grob ();
-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_, beam_dir_);
- if (start_mom_ == now_mom ())
- Stem::set_beaming (s, flags_, RIGHT);
- else
- Stem::set_beaming (s, flags_, LEFT);
-
if (Stem::duration_log (s) != 1)
- {
- beam_->set_property ("gap-count", scm_int2num (flags_ - total_duration_flags_));
- }
+ beam_->set_property ("gap-count", scm_from_int (flags_ - expected_beam_count_));
- if (info.music_cause ()->is_mus_type ("rhythmic-event"))
+ if (beam_dir_ == RIGHT)
{
- Beam::add_stem (beam_, s);
+ beam_dir_ = LEFT;
+ announce_end_grob (beam_, s->self_scm ());
}
+
+ if (info.ultimate_event_cause ()->in_event_class ("rhythmic-event"))
+ Beam::add_stem (beam_, s);
else
{
- String s = _ ("stem must have Rhythmic structure");
- if (info.music_cause ())
- info.music_cause ()->origin ()->warning (s);
+ string s = _ ("stem must have Rhythmic structure");
+ if (info.event_cause ())
+ info.event_cause ()->origin ()->warning (s);
else
::warning (s);
}
}
- else if (repeat_ &&
- flags_ && !sequential_body_b_ && Stem::has_interface (info.grob_))
- {
- 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);
- }
-}
-
-
-void
-Chord_tremolo_engraver::start_translation_timestep ()
-{
- if (beam_ && stop_mom_ == now_mom ())
- {
- finished_beam_ = beam_;
- repeat_ = 0;
- beam_ = 0;
- }
}
+ADD_ACKNOWLEDGER (Chord_tremolo_engraver, stem);
+ADD_TRANSLATOR (Chord_tremolo_engraver,
+ /* doc */
+ "Generate beams for tremolo repeats.",
-void
-Chord_tremolo_engraver::stop_translation_timestep ()
-{
- typeset_beam ();
-
- if (stem_tremolo_)
- {
- typeset_grob (stem_tremolo_);
- stem_tremolo_ = 0;
- }
-}
-
+ /* create */
+ "Beam ",
+ /* read */
+ "",
-ENTER_DESCRIPTION (Chord_tremolo_engraver,
-/* descr */ "Generates beams for tremolo repeats.",
-/* creats*/ "Beam",
-/* accepts */ "repeated-music",
-/* acks */ "stem-interface note-head-interface",
-/* reads */ "",
-/* write */ "");
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff