-/*
- 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 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 "musical-request.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 "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 ();
-public:
- VIRTUAL_COPY_CONS(Translator);
- Chord_tremolo_engraver();
+ TRANSLATOR_DECLARATIONS (Chord_tremolo_engraver);
protected:
- Repeated_music * repeat_;
+ Stream_event *repeat_;
- /// moment (global time) where beam started.
- Moment start_mom_;
- Moment stop_mom_;
+ int 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_;
-
- int note_head_i_;
-
- Spanner * beam_p_;
- Spanner * finished_beam_p_;
-
+ 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 create_grobs ();
+ virtual void finalize ();
+ void process_music ();
+ DECLARE_TRANSLATOR_LISTENER (tremolo_span);
+ DECLARE_ACKNOWLEDGER (stem);
};
-Chord_tremolo_engraver::Chord_tremolo_engraver()
+Chord_tremolo_engraver::Chord_tremolo_engraver ()
{
- beam_p_ = finished_beam_p_ = 0;
- repeat_ =0;
- note_head_i_ = 0;
+ beam_ = 0;
+ repeat_ = 0;
+ flags_ = 0;
+ 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_mus_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_cxx_function
- && !repeat_)
+ Direction span_dir = to_dir (ev->get_property ("span-direction"));
+ if (span_dir == START)
+ {
+ if (ASSIGN_EVENT_ONCE (repeat_, ev))
+ {
+ 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;
+ }
+ }
+ else if (span_dir == STOP)
{
- Moment l = rp->body_length_mom ();
- repeat_ = rp;
- start_mom_ = now_mom ();
- stop_mom_ = start_mom_ + l;
-
- // ugh. should generate dots, triplet beams.
- note_head_i_ = l.den () <? 4;
- return true;
+ if (!repeat_)
+ ev->origin ()->warning (_ ("No tremolo to end"));
+ repeat_ = 0;
+ beam_ = 0;
+ expected_beam_count_ = 0;
+ beam_dir_ = CENTER;
}
- return false;
}
void
-Chord_tremolo_engraver::create_grobs ()
+Chord_tremolo_engraver::process_music ()
{
- if (repeat_ && !beam_p_)
+ if (repeat_ && !beam_)
{
- beam_p_ = new Spanner (get_property ("Beam"));
- Beam::set_interface (beam_p_);
- beam_p_->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_p_, repeat_);
+ beam_ = make_spanner ("Beam", repeat_->self_scm ());
}
}
-
void
Chord_tremolo_engraver::finalize ()
{
- typeset_beam ();
- if (beam_p_)
+ if (beam_)
{
repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
-#if 0
- finished_beam_p_ = beam_p_;
- typeset_beam ();
-#else
- beam_p_->suicide ();
-#endif
+ 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_p_)
+ if (beam_)
{
- typeset_grob (finished_beam_p_);
- finished_beam_p_ = 0;
- }
-}
+ Grob *s = info.grob ();
+ Stem::set_beaming (s, flags_, beam_dir_);
-void
-Chord_tremolo_engraver::acknowledge_grob (Grob_info info)
-{
- if (beam_p_)
- {
- if (Stem::has_interface (info.elem_l_))
+ if (Stem::duration_log (s) != 1)
+ beam_->set_property ("gap-count", scm_from_int (flags_ - expected_beam_count_));
+
+ if (beam_dir_ == RIGHT)
{
- Grob * s = info.elem_l_;
- int f = Stem::flag_i (s);
- f = (f > 2) ? f - 2 : 1;
- Stem::set_beaming (s, f, LEFT);
- Stem::set_beaming (s, f, RIGHT);
-
- /*
- URG: this sets the direction of the Stem s.
- It's amazing Mike:
-
- Stem:: type_i () ->first_head ()->get_direction () ->
- Directional_element_interface::set (me, d);
-
-
- don't understand this comment.
- --hwn.
- */
- SCM d = s->get_grob_property ("direction");
- if (Stem::type_i (s ) != 1)
- {
- int gap_i =Stem::flag_i (s ) - ((Stem::type_i (s ) >? 2) - 2);
- beam_p_->set_grob_property ("beam-gap", gh_int2scm(gap_i));
- }
- s->set_grob_property ("direction", d);
-
- if (dynamic_cast <Rhythmic_req *> (info.req_l_))
- {
- Beam::add_stem (beam_p_, s);
- }
- else
- {
- String s = _ ("stem must have Rhythmic structure");
- if (info.req_l_)
- info.req_l_->origin ()->warning (s);
- else
- ::warning (s);
- }
+ beam_dir_ = LEFT;
+ announce_end_grob (beam_, s->self_scm ());
}
- if (Note_head::has_interface (info.elem_l_))
+
+ if (info.ultimate_event_cause ()->in_event_class ("rhythmic-event"))
+ Beam::add_stem (beam_, s);
+ else
{
- info.elem_l_->set_grob_property ("duration-log", gh_int2scm (intlog2 (note_head_i_)));
+ string s = _ ("stem must have Rhythmic structure");
+ if (info.event_cause ())
+ info.event_cause ()->origin ()->warning (s);
+ else
+ ::warning (s);
}
}
}
+ADD_ACKNOWLEDGER (Chord_tremolo_engraver, stem);
+ADD_TRANSLATOR (Chord_tremolo_engraver,
+ /* doc */
+ "Generate beams for tremolo repeats.",
-void
-Chord_tremolo_engraver::start_translation_timestep ()
-{
- if (beam_p_ && stop_mom_ == now_mom ())
- {
- finished_beam_p_ = beam_p_;
-
- repeat_ = 0;
- beam_p_ = 0;
- }
-}
-
-
-void
-Chord_tremolo_engraver::stop_translation_timestep ()
-{
- typeset_beam ();
-}
+ /* create */
+ "Beam ",
-ADD_THIS_TRANSLATOR(Chord_tremolo_engraver);
+ /* read */
+ "",
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff