-/*
- abbreviation-beam-engraver.cc -- implement Chord_tremolo_engraver
-
+/*
+ new-chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
+
source file of the GNU LilyPond music typesetter
-
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
-*/
-
-#include "duration-convert.hh"
-#include "time-description.hh"
-#include "chord-tremolo-engraver.hh"
+
+ (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+
+ */
+
+#include "engraver.hh"
+#include "beam.hh"
+#include "repeated-music.hh"
#include "stem.hh"
-#include "chord-tremolo.hh"
-#include "musical-request.hh"
-#include "misc.hh"
+#include "rhythmic-head.hh"
+#include "engraver-group-engraver.hh"
+#include "event.hh"
#include "warn.hh"
-#include "score-engraver.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
+
+/**
+
+ This acknowledges repeated music with "tremolo" style. It typesets
+ a beam.
+
+ TODO:
-ADD_THIS_TRANSLATOR (Chord_tremolo_engraver);
+ - 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:
+ 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_;
+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 ();
+};
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;
+ sequential_body_b_ = 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))
+ Repeated_music * rp = dynamic_cast<Repeated_music*> (m);
+ if (rp
+ && rp->get_mus_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 = rp->get_length ();
+ repeat_ = rp;
+ start_mom_ = now_mom ();
+ stop_mom_ = start_mom_ + l;
- if ((d == STOP) && !abeam_p_)
+ 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)
{
- m->warning (_ ("no tremolo beam to end"));
- return false;
+ rp->origin ()->warning (_f ("Chord tremolo with %d elements. Must have two elements.", elt_count));
}
- reqs_drul_[d] = b;
+ 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;
}
}
void
-Chord_tremolo_engraver::do_process_requests ()
+Chord_tremolo_engraver::process_music ()
{
- if (reqs_drul_[STOP])
- {
- if (!abeam_p_)
- reqs_drul_[STOP]->warning (_ ("no tremolo beam to end"));
- prev_start_req_ = 0;
- finished_abeam_p_ = abeam_p_;
- abeam_p_ = 0;
- }
-
- if (abeam_p_)
+ if (repeat_)
{
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
+ if (sequential_body_b_ && !beam_)
{
- e = dynamic_cast<Score_engraver*> (t);
+ beam_ = make_spanner ("Beam");
+ beam_->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_, repeat_->self_scm());
}
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks ();
- }
-
- if (reqs_drul_[START])
- {
- if (abeam_p_)
+ else if (!sequential_body_b_ && !stem_tremolo_)
{
- reqs_drul_[START]->warning (_ ("Already have a tremolo beam"));
- return;
+ if (flags_)
+ {
+ stem_tremolo_ = make_item ("StemTremolo");
+ announce_grob(stem_tremolo_, repeat_->self_scm());
+ stem_tremolo_->set_grob_property ("flag-count",
+ scm_int2num (flags_));
+ }
}
-
- prev_start_req_ = reqs_drul_[START];
-
- abeam_p_ = new Chord_tremolo;
- 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 ();
+ if (finished_beam_)
+ {
+ typeset_grob (finished_beam_);
+ finished_beam_ = 0;
+ }
}
void
-Chord_tremolo_engraver::typeset_beam ()
+Chord_tremolo_engraver::acknowledge_grob (Grob_info info)
{
- if (finished_abeam_p_)
+ if (beam_ && Stem::has_interface (info.grob_))
{
- 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_grob_property ("gap-count", gh_int2scm (flags_ - total_duration_flags_));
+ }
- reqs_drul_[STOP] = 0;
+ if (info.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 (stem_tremolo_ && Stem::has_interface (info.grob_))
+ {
+ Stem_tremolo::set_stem (stem_tremolo_, info.grob_);
+ stem_tremolo_->set_parent (info.grob_,X_AXIS);
}
}
+
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* s = dynamic_cast<Stem *> (i.elem_l_))
- {
- int type_i = prev_start_req_->type_i_;
- s->flag_i_ = intlog2 (type_i) - 2;
+ typeset_beam ();
- s->beams_i_drul_[LEFT] = s->flag_i_;
- s->beams_i_drul_[RIGHT] = s->flag_i_;
-
- abeam_p_->multiple_i_ = s->flag_i_;
- /*
- abbrev gaps on all but half note
- */
-#if 0
- if (s->type_i () != 1)
- {
- int gap_i =s->flag_i_ - ((s->type_i () >? 2) - 2);
- s->set_elt_property (beam_gap_scm_sym, 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_scm_sym, gh_int2scm(gap_i));
- }
-#endif
-
- abeam_p_->add_stem (s);
- }
+ if (stem_tremolo_)
+ {
+ typeset_grob (stem_tremolo_);
+ stem_tremolo_ = 0;
}
}
+
+
+
+ENTER_DESCRIPTION(Chord_tremolo_engraver,
+/* descr */ "Generates beams for tremolo repeats.",
+/* creats*/ "Beam",
+/* accepts */ "repeated-music",
+/* acks */ "stem-interface note-head-interface",
+/* reads */ "",
+/* write */ "");
projects / lilypond.git / blobdiff