X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstem-engraver.cc;h=797406b4fbc062d28aa0cc9af6f152d3435073ce;hb=ead7f5fc798e640194cb23d9a50b375af1f08dcd;hp=dd5ddb1c8a04bb99b6977f5b2b8e165842b2ba2c;hpb=2b0aa2c5bbb4af4e7d0d3c057de066dc1d6d6b8d;p=lilypond.git diff --git a/lily/stem-engraver.cc b/lily/stem-engraver.cc index dd5ddb1c8a..797406b4fb 100644 --- a/lily/stem-engraver.cc +++ b/lily/stem-engraver.cc @@ -1,140 +1,188 @@ /* - stem-grav.cc -- implement Stem_engraver + stem-engraver.cc -- implement Stem_engraver source file of the GNU LilyPond music typesetter - (c) 1997--1999 Han-Wen Nienhuys + (c) 1997--2006 Han-Wen Nienhuys */ -#include "stem-engraver.hh" -#include "note-head.hh" -#include "stem.hh" -#include "musical-request.hh" -#include "duration-convert.hh" +#include "engraver.hh" + +#include "context.hh" +#include "directional-element-interface.hh" +#include "duration.hh" +#include "international.hh" +#include "item.hh" #include "misc.hh" +#include "rhythmic-head.hh" +#include "script-interface.hh" +#include "staff-symbol-referencer.hh" #include "stem-tremolo.hh" -#include "staff-info.hh" -#include "translator-group.hh" +#include "stem.hh" -Stem_engraver::Stem_engraver() +/** + Make stems upon receiving noteheads. +*/ +class Stem_engraver : public Engraver { - abbrev_req_l_ = 0; - stem_p_ = 0; - abbrev_p_ = 0; - default_abbrev_i_ = 16; - rhythmic_req_l_ =0; -} + Grob *stem_; + Grob *tremolo_; + Music *rhythmic_ev_; + Music *tremolo_ev_; -void -Stem_engraver::do_creation_processing () + TRANSLATOR_DECLARATIONS (Stem_engraver); + +protected: + void make_stem (Grob_info); + + DECLARE_ACKNOWLEDGER (rhythmic_head); + void stop_translation_timestep (); + virtual bool try_music (Music *); +}; + +Stem_engraver::Stem_engraver () { - SCM prop = get_property ("abbrev", 0); - if (gh_number_p(prop)) - { - default_abbrev_i_ = gh_scm2int (prop); - } + tremolo_ev_ = 0; + stem_ = 0; + tremolo_ = 0; + rhythmic_ev_ = 0; } void -Stem_engraver::acknowledge_element(Score_element_info i) +Stem_engraver::make_stem (Grob_info gi) { - if (Rhythmic_head * h = dynamic_cast (i.elem_l_)) + /* Announce the cause of the head as cause of the stem. The + stem needs a rhythmic structure to fit it into a beam. */ + stem_ = make_item ("Stem", gi.grob ()->self_scm ()); + + /* + we take the duration log from the Event, since the duration-log + for a note head is always <= 2. + */ + Music *music = gi.music_cause (); + Duration *dur = unsmob_duration (music->get_property ("duration")); + + stem_->set_property ("duration-log", dur ? scm_from_int (dur->duration_log ()) : 0); + + if (tremolo_ev_) { - if (h->stem_l_) - return; - - Rhythmic_req * r = dynamic_cast (i.req_l_); - int duration_log = r->duration_.durlog_i_; - if (!stem_p_) + /* Stem tremolo is never applied to a note by default, + is must me requested. But there is a default for the + tremolo value: + + c4:8 c c: + + the first and last (quarter) note bothe get one tremolo flag. */ + int requested_type + = scm_to_int (tremolo_ev_->get_property ("tremolo-type")); + SCM f = get_property ("tremoloFlags"); + if (!requested_type) { - stem_p_ = new Stem; - stem_p_->flag_i_ = duration_log; - - if (abbrev_req_l_) - { - /* - suggests typing of: - c8:16 c: c: c: - hmm, which isn't so bad? - */ - int t = abbrev_req_l_->type_i_; - if (!t) - t = default_abbrev_i_; - else - default_abbrev_i_ = t; - - if (t) - { - abbrev_p_ = new Stem_tremolo; - announce_element (Score_element_info (abbrev_p_, abbrev_req_l_)); - abbrev_p_->abbrev_flags_i_ =intlog2 (t) - (duration_log>? 2); - } - } - - // must give the request, to preserve the rhythmic info. - announce_element (Score_element_info (stem_p_, r)); + if (scm_is_number (f)) + requested_type = scm_to_int (f); + else + requested_type = 8; } + else + context ()->set_property ("tremoloFlags", scm_from_int (requested_type)); - if (stem_p_->flag_i_ != duration_log) + int tremolo_flags = intlog2 (requested_type) - 2 + - (dur->duration_log () > 2 ? dur->duration_log () - 2 : 0); + if (tremolo_flags <= 0) { - r->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << stem_p_->flag_i_)); + tremolo_ev_->origin ()->warning (_ ("tremolo duration is too long")); + tremolo_flags = 0; } - stem_p_->add_head (h); + if (tremolo_flags) + { + tremolo_ = make_item ("StemTremolo", tremolo_ev_->self_scm ()); + + /* The number of tremolo flags is the number of flags of the + tremolo-type minus the number of flags of the note itself. */ + tremolo_->set_property ("flag-count", scm_from_int (tremolo_flags)); + tremolo_->set_parent (stem_, X_AXIS); + stem_->set_object ("tremolo-flag", tremolo_->self_scm ()); + tremolo_->set_object ("stem", stem_->self_scm ()); + } } } void -Stem_engraver::do_pre_move_processing() +Stem_engraver::acknowledge_rhythmic_head (Grob_info gi) { - if (abbrev_p_) + if (Rhythmic_head::get_stem (gi.grob ())) + return; + + Music *cause = gi.music_cause (); + if (!cause) + return; + Duration *d = unsmob_duration (cause->get_property ("duration")); + if (!d) + return; + + if (!stem_) + make_stem (gi); + + if (Stem::duration_log (stem_) != d->duration_log ()) { - abbrev_p_->set_stem (stem_p_); - typeset_element (abbrev_p_); - abbrev_p_ = 0; + // FIXME: + gi.music_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d)", + 1 << Stem::duration_log (stem_))); + gi.music_cause ()->origin ()->warning (_f ("maybe input should specify polyphonic voices")); } - if (stem_p_) + Stem::add_head (stem_, gi.grob ()); +} + +void +Stem_engraver::stop_translation_timestep () +{ + tremolo_ = 0; + if (stem_) { - Translator_group* which; - SCM prop = get_property ("stemLeftBeamCount", &which); - if (gh_number_p(prop)) - { - stem_p_->beams_i_drul_[LEFT] = gh_scm2int (prop); - ((Translator_group*)which)->set_property ("stemLeftBeamCount", SCM_UNDEFINED); - } - prop = get_property ("stemRightBeamCount", &which); - if (gh_number_p(prop)) + /* FIXME: junk these properties. */ + SCM prop = get_property ("stemLeftBeamCount"); + if (scm_is_number (prop)) { - stem_p_->beams_i_drul_[RIGHT] = gh_scm2int (prop); - ((Translator_group*)which)->set_property ("stemRightBeamCount", SCM_UNDEFINED); + Stem::set_beaming (stem_, scm_to_int (prop), LEFT); + context ()->unset_property (ly_symbol2scm ("stemLeftBeamCount")); } - - // UGH. Should mark non-forced instead. - SCM dir = stem_p_->get_elt_property ("direction"); - if (gh_number_p (dir) && gh_int2scm (dir)) + prop = get_property ("stemRightBeamCount"); + if (scm_is_number (prop)) { - stem_p_->set_elt_property ("dir-forced", SCM_BOOL_T); + Stem::set_beaming (stem_, scm_to_int (prop), RIGHT); + context ()->unset_property (ly_symbol2scm ("stemRightBeamCount")); } - - - typeset_element(stem_p_); - stem_p_ = 0; + stem_ = 0; } - abbrev_req_l_ = 0; + tremolo_ev_ = 0; } bool -Stem_engraver::do_try_music (Music* r) +Stem_engraver::try_music (Music *m) { - if (Tremolo_req* a = dynamic_cast (r)) + if (m->is_mus_type ("tremolo-event")) { - abbrev_req_l_ = a; + tremolo_ev_ = m; return true; } return false; } - -ADD_THIS_TRANSLATOR(Stem_engraver); - +#include "translator.icc" + +ADD_ACKNOWLEDGER (Stem_engraver, rhythmic_head); + +ADD_TRANSLATOR (Stem_engraver, + /* doc */ "Create stems and single-stem tremolos. It also works together with " + "the beam engraver for overriding beaming.", + /* create */ + "Stem " + "StemTremolo ", + /* accept */ "tremolo-event", + /* read */ + "tremoloFlags " + "stemLeftBeamCount " + "stemRightBeamCount ", + /* write */ "");