source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 2000--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "duration-convert.hh"
-#include "timing-translator.hh"
-#include "chord-tremolo-engraver.hh"
-#include "stem.hh"
+#include "math.h" // ceil
+
#include "beam.hh"
-#include "musical-request.hh"
+#include "chord-tremolo-iterator.hh"
+#include "engraver-group.hh"
+#include "international.hh"
+#include "item.hh"
#include "misc.hh"
+#include "repeated-music.hh"
+#include "rhythmic-head.hh"
+#include "spanner.hh"
+#include "stem-tremolo.hh"
+#include "stem.hh"
#include "warn.hh"
-#include "score-engraver.hh"
-ADD_THIS_TRANSLATOR (Chord_tremolo_engraver);
+#include "translator.icc"
+
+/**
+
+This acknowledges repeated music with "tremolo" style. It typesets
+a beam.
+
+TODO:
+
+- perhaps use engraver this to steer other engravers? That would
+create dependencies between engravers, which is bad.
+
+- create dots if appropriate.
+
+- create TremoloBeam iso Beam?
+*/
+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_;
+
+ /// 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 ()
{
- reqs_drul_[LEFT] = reqs_drul_[RIGHT] = 0;
- abeam_p_ = 0;
- finished_abeam_p_ = 0;
- prev_start_req_ = 0;
+ beam_ = finished_beam_ = 0;
+ repeat_ = 0;
+ flags_ = 0;
+ stem_tremolo_ = 0;
+ body_is_sequential_ = false;
}
bool
-Chord_tremolo_engraver::do_try_music (Music* m)
+Chord_tremolo_engraver::try_music (Music *m)
{
- if (Chord_tremolo_req* b = dynamic_cast <Chord_tremolo_req *> (m))
+ if (m->is_mus_type ("repeated-music")
+ && m->get_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
+ && !repeat_)
{
- Direction d = b->span_dir_;
- if (reqs_drul_[d] && !reqs_drul_[d]->equal_b (b))
- return false;
+ Moment l = m->get_length ();
+ repeat_ = m;
+ start_mom_ = now_mom ();
+ stop_mom_ = start_mom_ + l;
- if ((d == STOP) && !abeam_p_)
- {
- m->warning (_ ("no tremolo beam to end"));
- return false;
- }
+ 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;
- reqs_drul_[d] = b;
return true;
}
}
void
-Chord_tremolo_engraver::do_process_requests ()
+Chord_tremolo_engraver::process_music ()
{
- if (reqs_drul_[STOP])
+ if (repeat_ && body_is_sequential_ && !beam_)
{
- if (!abeam_p_)
- reqs_drul_[STOP]->warning (_ ("no tremolo beam to end"));
- prev_start_req_ = 0;
- finished_abeam_p_ = abeam_p_;
- abeam_p_ = 0;
- }
+ beam_ = make_spanner ("Beam", repeat_->self_scm ());
+ beam_->set_property ("chord-tremolo", SCM_BOOL_T);
- if (abeam_p_)
- {
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
- {
- e = dynamic_cast<Score_engraver*> (t);
- }
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks ();
+ beam_start_location_ = robust_scm2moment (get_property ("measurePosition"), Moment (0));
}
-
- if (reqs_drul_[START])
- {
- if (abeam_p_)
- {
- reqs_drul_[START]->warning (_ ("Already have a tremolo beam"));
- return;
- }
-
- prev_start_req_ = reqs_drul_[START];
-
- abeam_p_ = new Beam;
- abeam_p_->set_elt_property ("chord-tremolo", SCM_BOOL_T);
-
- announce_element (Score_element_info (abeam_p_, reqs_drul_[LEFT]));
- }
}
void
-Chord_tremolo_engraver::do_post_move_processing ()
+Chord_tremolo_engraver::finalize ()
{
- reqs_drul_ [START] = 0;
+ typeset_beam ();
+ if (beam_)
+ {
+ repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
+ beam_->suicide ();
+ }
}
void
-Chord_tremolo_engraver::do_pre_move_processing ()
+Chord_tremolo_engraver::typeset_beam ()
{
- typeset_beam ();
+ finished_beam_ = 0;
}
void
-Chord_tremolo_engraver::typeset_beam ()
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- if (finished_abeam_p_)
+ if (beam_)
{
- typeset_element (finished_abeam_p_);
- finished_abeam_p_ = 0;
+ 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_));
- reqs_drul_[STOP] = 0;
+ if (info.ultimate_music_cause ()->is_mus_type ("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);
+ 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);
+ info.grob ()->set_object ("tremolo-flag", stem_tremolo_->self_scm ());
}
}
void
-Chord_tremolo_engraver::do_removal_processing ()
+Chord_tremolo_engraver::start_translation_timestep ()
{
- typeset_beam ();
- if (abeam_p_)
+ if (beam_ && stop_mom_ == now_mom ())
{
- prev_start_req_->warning (_ ("unfinished tremolo beam"));
- finished_abeam_p_ = abeam_p_;
- typeset_beam ();
+ finished_beam_ = beam_;
+ repeat_ = 0;
+ beam_ = 0;
}
}
void
-Chord_tremolo_engraver::acknowledge_element (Score_element_info i)
+Chord_tremolo_engraver::stop_translation_timestep ()
{
- if (abeam_p_)
+ if (stem_tremolo_)
{
- if (Stem* s = dynamic_cast<Stem *> (i.elem_l_))
- {
- int type_i = prev_start_req_->type_i_;
- s->set_elt_property ("duration-log", gh_int2scm (intlog2 (type_i) - 2));
-
- s->set_beaming (s->flag_i (), LEFT);
- s->set_beaming ( s->flag_i (), RIGHT);
-
-
-#if 0
- if (s->type_i () != 1)
- {
- int gap_i =s->flag_i () - ((s->type_i () >? 2) - 2);
- s->set_elt_property ("beam-gap", gh_int2scm(gap_i));
- }
-#else
- if (s->type_i () != 1)
- {
- int gap_i =s->flag_i () - ((s->type_i () >? 2) - 2);
- abeam_p_->set_elt_property ("beam-gap", gh_int2scm(gap_i));
- }
-#endif
-
- abeam_p_->add_stem (s);
- }
+ 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.",
+ /* create */ "Beam",
+ /* accept */ "repeated-music",
+ /* read */ "",
+ /* write */ "");
projects / lilypond.git / blobdiff