X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fchord-tremolo-engraver.cc;h=d28af332f6e892053a42a17c223da2380e9255c9;hb=ff90d34b47b91a7321ff9b21fe20133911376364;hp=4b6ab0e69b19488045e7674ea2d1892267c89920;hpb=bb36bac02a64770871780231ecc709cb18b20932;p=lilypond.git diff --git a/lily/chord-tremolo-engraver.cc b/lily/chord-tremolo-engraver.cc index 4b6ab0e69b..d28af332f6 100644 --- a/lily/chord-tremolo-engraver.cc +++ b/lily/chord-tremolo-engraver.cc @@ -3,45 +3,108 @@ source file of the GNU LilyPond music typesetter - (c) 1997--2000 Han-Wen Nienhuys - Jan Nieuwenhuizen + (c) 2000--2006 Han-Wen Nienhuys */ -#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 (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; } @@ -49,115 +112,102 @@ Chord_tremolo_engraver::do_try_music (Music* m) } 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 (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 + { + std::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::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 (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 */ "");