X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fchord-tremolo-engraver.cc;h=b0f17352baa49915e771c4b92d8d23f1fe34b60e;hb=621e5fb6a5c3cb67c46082e561cffad691ead30c;hp=4272ec2bef599fdb0bc5affa4a567a06c2a593bc;hpb=94a1966c72301b8bd1d8bb3b8628c3f089d007cf;p=lilypond.git diff --git a/lily/chord-tremolo-engraver.cc b/lily/chord-tremolo-engraver.cc index 4272ec2bef..b0f17352ba 100644 --- a/lily/chord-tremolo-engraver.cc +++ b/lily/chord-tremolo-engraver.cc @@ -1,141 +1,106 @@ -/* - 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--2004 Han-Wen Nienhuys - - */ -#include "engraver.hh" + (c) 2000--2006 Han-Wen Nienhuys + Erik Sandberg +*/ + #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 "event.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 "math.h" // ceil +#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 (); 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_; + Stream_event *repeat_; + + int flags_; + // number of beams for short tremolos + int expected_beam_count_; + // current direction of beam (first RIGHT, then LEFT) + Direction beam_dir_; + + 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 process_music (); + void process_music (); + DECLARE_TRANSLATOR_LISTENER (tremolo_span); + DECLARE_ACKNOWLEDGER (stem); }; Chord_tremolo_engraver::Chord_tremolo_engraver () { - beam_ = finished_beam_ = 0; - repeat_ =0; + beam_ = 0; + repeat_ = 0; flags_ = 0; - stem_tremolo_ = 0; - sequential_body_b_ = false; + 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 (m); - if (rp - && rp->get_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc - && !repeat_) + Direction span_dir = to_dir (ev->get_property ("span-direction")); + if (span_dir == START) { - Moment l = rp->get_length (); - repeat_ = rp; - start_mom_ = now_mom (); - stop_mom_ = start_mom_ + l; - - Sequential_music * seq = dynamic_cast (rp->body ()); - sequential_body_b_ = seq; - - int elt_count = seq ? scm_ilength (seq-> music_list ()) : 1; - - if (seq && elt_count != 2) - { - rp->origin ()->warning (_f ("Chord tremolo with %d elements. Must have two elements.", elt_count)); - } - - 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; + 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) + { + repeat_ = 0; + beam_ = 0; + expected_beam_count_ = 0; + beam_dir_ = CENTER; } - - return false; } void Chord_tremolo_engraver::process_music () { - if (repeat_ && sequential_body_b_ && !beam_) - { - beam_ = make_spanner ("Beam"); - 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_, repeat_->self_scm ()); - } + if (repeat_ && !beam_) + { + beam_ = make_spanner ("Beam", repeat_->self_scm ()); + } } void Chord_tremolo_engraver::finalize () { - typeset_beam (); if (beam_) { repeat_->origin ()->warning (_ ("unterminated chord tremolo")); @@ -144,89 +109,37 @@ Chord_tremolo_engraver::finalize () } void -Chord_tremolo_engraver::typeset_beam () +Chord_tremolo_engraver::acknowledge_stem (Grob_info info) { - if (finished_beam_) + if (beam_) { - typeset_grob (finished_beam_); - finished_beam_ = 0; - } -} + Grob *s = info.grob (); -void -Chord_tremolo_engraver::acknowledge_grob (Grob_info info) -{ - if (beam_ && Stem::has_interface (info.grob_)) - { - Grob * s = info.grob_; + Stem::set_beaming (s, flags_, beam_dir_); - 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_int2num (flags_ - total_duration_flags_)); - } + beam_->set_property ("gap-count", scm_from_int (flags_ - expected_beam_count_)); - if (info.music_cause ()->is_mus_type ("rhythmic-event")) - { - Beam::add_stem (beam_, s); - } + if (beam_dir_ == RIGHT) + beam_dir_ = LEFT; + + if (info.ultimate_music_cause ()->is_mus_type ("rhythmic-event")) + Beam::add_stem (beam_, s); else { - String s = _ ("stem must have Rhythmic structure"); + string s = _ ("stem must have Rhythmic structure"); if (info.music_cause ()) info.music_cause ()->origin ()->warning (s); else ::warning (s); } } - else if (repeat_ && - flags_ && !sequential_body_b_ && Stem::has_interface (info.grob_)) - { - stem_tremolo_ = make_item ("StemTremolo"); - announce_grob (stem_tremolo_, repeat_->self_scm ()); - stem_tremolo_->set_property ("flag-count", - scm_int2num (flags_)); - stem_tremolo_->set_property ("stem", - info.grob_->self_scm ()); - stem_tremolo_->set_parent (info.grob_, X_AXIS); - } -} - - -void -Chord_tremolo_engraver::start_translation_timestep () -{ - if (beam_ && stop_mom_ == now_mom ()) - { - finished_beam_ = beam_; - repeat_ = 0; - beam_ = 0; - } -} - - -void -Chord_tremolo_engraver::stop_translation_timestep () -{ - typeset_beam (); - - 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 */ ""); +ADD_ACKNOWLEDGER (Chord_tremolo_engraver, stem); +ADD_TRANSLATOR (Chord_tremolo_engraver, + /* doc */ "Generates beams for tremolo repeats.", + /* create */ "Beam", + /* accept */ "tremolo-span-event", + /* read */ "", + /* write */ "");