-/*
- 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--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 "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 "music-list.hh"
+#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 ();
-public:
- VIRTUAL_COPY_CONS(Translator);
- 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 total_duration_flags_;
/// location within measure where beam started.
Moment beam_start_location_;
- int note_head_i_;
-
- bool sequential_body_b_;
- Spanner * beam_p_;
- Spanner * finished_beam_p_;
- 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 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()
+Chord_tremolo_engraver::Chord_tremolo_engraver ()
{
- beam_p_ = finished_beam_p_ = 0;
- repeat_ =0;
- note_head_i_ = 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_cxx_function
- && !repeat_)
+ if (m->is_mus_type ("repeated-music")
+ && m->get_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
+ && !repeat_)
{
- Moment l = rp->length_mom ();
- repeat_ = rp;
+ Moment l = m->get_length ();
+ repeat_ = m;
start_mom_ = now_mom ();
stop_mom_ = start_mom_ + l;
- sequential_body_b_ = dynamic_cast<Sequential_music*> (rp->body ());
- // ugh. should generate dots, triplet beams.
- note_head_i_ = l.den () <? 4;
+ 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;
+
return true;
}
void
Chord_tremolo_engraver::process_music ()
{
- if (repeat_)
+ if (repeat_ && body_is_sequential_ && !beam_)
{
- if (sequential_body_b_ && !beam_p_)
- {
- beam_p_ = new Spanner (get_property ("Beam"));
- Beam::set_interface (beam_p_);
- beam_p_->set_grob_property ("chord-tremolo", SCM_BOOL_T);
-
+ 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;
- announce_grob (beam_p_, repeat_);
- }
- else if (!sequential_body_b_ && !stem_tremolo_)
- {
- int flags = intlog2(note_head_i_ * repeat_->repeat_count ()) -2;
- if (flags)
- {
- stem_tremolo_ = new Item (get_property ("StemTremolo"));
- Stem_tremolo::set_interface (stem_tremolo_);
-
- announce_grob (stem_tremolo_, repeat_);
- stem_tremolo_->set_grob_property ("tremolo-flags",
- gh_int2scm (flags));
-
- }
- }
+ beam_start_location_ = robust_scm2moment (get_property ("measurePosition"), Moment (0));
}
}
+
void
Chord_tremolo_engraver::finalize ()
{
typeset_beam ();
- if (beam_p_)
+ if (beam_)
{
repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
- beam_p_->suicide ();
+ beam_->suicide ();
}
}
void
Chord_tremolo_engraver::typeset_beam ()
{
- if (finished_beam_p_)
- {
- typeset_grob (finished_beam_p_);
- finished_beam_p_ = 0;
- }
+ finished_beam_ = 0;
}
-
void
-Chord_tremolo_engraver::acknowledge_grob (Grob_info info)
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- if (beam_p_)
+ if (beam_)
{
- if (Stem::has_interface (info.elem_l_))
+ Grob *s = info.grob ();
+
+ 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_from_int (flags_ - total_duration_flags_));
+
+ if (info.ultimate_music_cause ()->is_mus_type ("rhythmic-event"))
+ Beam::add_stem (beam_, s);
+ else
{
- 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);
- }
+ string s = _ ("stem must have Rhythmic structure");
+ if (info.music_cause ())
+ info.music_cause ()->origin ()->warning (s);
else
- {
- String s = _ ("stem must have Rhythmic structure");
- if (info.req_l_)
- info.req_l_->origin ()->warning (s);
- else
- ::warning (s);
- }
+ ::warning (s);
}
}
- else if (stem_tremolo_ && Stem::has_interface (info.elem_l_))
- {
- Stem_tremolo::set_stem (stem_tremolo_, info.elem_l_);
-
- info.elem_l_->set_grob_property ("duration-log", gh_int2scm (intlog2 (note_head_i_)));
- }
-
-
- if (repeat_ && Note_head::has_interface (info.elem_l_))
+ else if (repeat_
+ && flags_
+ && !body_is_sequential_)
{
- info.elem_l_->set_grob_property ("duration-log", gh_int2scm (intlog2 (note_head_i_)));
+ 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 ()
{
- if (beam_p_ && stop_mom_ == now_mom ())
+ if (beam_ && stop_mom_ == now_mom ())
{
- finished_beam_p_ = beam_p_;
-
+ finished_beam_ = beam_;
repeat_ = 0;
- beam_p_ = 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 ("beam and stem tremolo?");
stem_tremolo_ = 0;
}
-
-}
-ADD_THIS_TRANSLATOR(Chord_tremolo_engraver);
+ typeset_beam ();
+}
+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