source file of the GNU LilyPond music typesetter
(c) 2000--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Erik Sandberg <mandolaerik@gmail.com>
*/
+#include "math.h" // ceil
+
#include "beam.hh"
-#include "repeated-music.hh"
-#include "stem.hh"
-#include "rhythmic-head.hh"
#include "engraver-group.hh"
-#include "warn.hh"
+#include "international.hh"
+#include "item.hh"
#include "misc.hh"
+#include "repeated-music.hh"
+#include "rhythmic-head.hh"
#include "spanner.hh"
-#include "item.hh"
-#include "chord-tremolo-iterator.hh"
#include "stem-tremolo.hh"
-#include "math.h" // ceil
+#include "stem.hh"
+#include "warn.hh"
#include "translator.icc"
*/
class Chord_tremolo_engraver : public Engraver
{
- void typeset_beam ();
TRANSLATOR_DECLARATIONS (Chord_tremolo_engraver);
protected:
Music *repeat_;
- /// moment (global time) where beam started.
- Moment start_mom_;
- Moment stop_mom_;
int flags_;
- int total_duration_flags_;
+ // number of beams for short tremolos
+ int expected_beam_count_;
+ // current direction of beam (first RIGHT, then LEFT)
+ Direction beam_dir_;
- /// location within measure where beam started.
- Moment beam_start_location_;
-
- bool body_is_sequential_;
Spanner *beam_;
- Spanner *finished_beam_;
- Item *stem_tremolo_;
protected:
virtual void finalize ();
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;
+ beam_ = 0;
repeat_ = 0;
flags_ = 0;
- stem_tremolo_ = 0;
- body_is_sequential_ = false;
+ expected_beam_count_ = 0;
+ beam_dir_ = CENTER;
}
bool
Chord_tremolo_engraver::try_music (Music *m)
{
- if (m->is_mus_type ("repeated-music")
- && m->get_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
- && !repeat_)
+ if (m->is_mus_type ("tremolo-span-event"))
{
- Moment l = m->get_length ();
- repeat_ = m;
- start_mom_ = now_mom ();
- stop_mom_ = start_mom_ + l;
-
- Music *body = Repeated_music::body (m);
- body_is_sequential_ = body->is_mus_type ("sequential-music");
-
- int elt_count = body_is_sequential_ ? scm_ilength (body->get_property ("elements")) : 1;
-
- 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 * Repeated_music::repeat_count (repeat_));
-
- total_duration_flags_ = max (0, (intlog2 (total_dur.den ()) - 2));
-
- flags_ = intlog2 (note_dur.den ()) -2;
-
+ Direction span_dir = to_dir (m->get_property ("span-direction"));
+ if (span_dir == START)
+ {
+ repeat_ = m;
+ int type = scm_to_int (m->get_property ("tremolo-type"));
+ /* e.g. 1 for type 8, 2 for type 16 */
+ flags_ = intlog2 (type) - 2;
+ expected_beam_count_ = scm_to_int (m->get_property ("expected-beam-count"));
+ beam_dir_ = RIGHT;
+ }
+ if (span_dir == STOP)
+ {
+ repeat_ = 0;
+ beam_ = 0;
+ expected_beam_count_ = 0;
+ beam_dir_ = CENTER;
+ }
return true;
}
-
return false;
}
void
Chord_tremolo_engraver::process_music ()
{
- if (repeat_ && body_is_sequential_ && !beam_)
+ if (repeat_ && !beam_)
{
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 ()
{
- typeset_beam ();
if (beam_)
{
repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
}
}
-void
-Chord_tremolo_engraver::typeset_beam ()
-{
- finished_beam_ = 0;
-}
-
void
Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
{
Grob *s = info.grob ();
- if (start_mom_ == now_mom ())
- Stem::set_beaming (s, flags_, RIGHT);
- else
- Stem::set_beaming (s, flags_, LEFT);
+ Stem::set_beaming (s, flags_, beam_dir_);
if (Stem::duration_log (s) != 1)
- beam_->set_property ("gap-count", scm_from_int (flags_ - total_duration_flags_));
+ beam_->set_property ("gap-count", scm_from_int (flags_ - expected_beam_count_));
+
+ if (beam_dir_ == RIGHT)
+ beam_dir_ = LEFT;
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 (repeat_
- && flags_
- && !body_is_sequential_)
- {
- 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);
- }
-}
-
-void
-Chord_tremolo_engraver::start_translation_timestep ()
-{
- if (beam_ && stop_mom_ == now_mom ())
- {
- finished_beam_ = beam_;
- repeat_ = 0;
- beam_ = 0;
- }
-}
-
-void
-Chord_tremolo_engraver::stop_translation_timestep ()
-{
- if (stem_tremolo_)
- {
- repeat_ = 0;
- if (beam_)
- programming_error ("beam and stem tremolo?");
- stem_tremolo_ = 0;
- }
-
- typeset_beam ();
}
ADD_ACKNOWLEDGER (Chord_tremolo_engraver, stem);
ADD_TRANSLATOR (Chord_tremolo_engraver,
- /* doc */ "Generates beams for tremolo repeats.",
+ /* doc */ "Generates beams for tremolo repeats.",
/* create */ "Beam",
- /* accept */ "repeated-music",
+ /* accept */ "tremolo-span-event",
/* read */ "",
/* write */ "");
projects / lilypond.git / blobdiff