X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstem-engraver.cc;h=8f122d473b0e6e6eea9e5c1b66487e4cf0df5577;hb=947454c5cc430a9627262de4f25274a64789d3c2;hp=edd978df5e024743d9a6666e8fc22395e5253b7f;hpb=685452c8675e89a84692420fb9891756d318e771;p=lilypond.git diff --git a/lily/stem-engraver.cc b/lily/stem-engraver.cc index edd978df5e..8f122d473b 100644 --- a/lily/stem-engraver.cc +++ b/lily/stem-engraver.cc @@ -3,135 +3,184 @@ source file of the GNU LilyPond music typesetter - (c) 1997--1999 Han-Wen Nienhuys + (c) 1997--2004 Han-Wen Nienhuys */ -#include "stem-engraver.hh" -#include "note-head.hh" +#include "staff-symbol-referencer.hh" +#include "rhythmic-head.hh" #include "stem.hh" -#include "musical-request.hh" -#include "duration-convert.hh" +#include "event.hh" #include "misc.hh" #include "stem-tremolo.hh" -#include "staff-info.hh" -#include "translator-group.hh" +#include "item.hh" +#include "context.hh" -Stem_engraver::Stem_engraver() -{ - abbrev_req_l_ = 0; - stem_p_ = 0; - abbrev_p_ = 0; - default_abbrev_i_ = 16; - rhythmic_req_l_ =0; -} +#include "engraver.hh" -void -Stem_engraver::do_creation_processing () + + +/** + Make stems upon receiving noteheads. + */ +class Stem_engraver : public Engraver { - SCM prop = get_property ("abbrev", 0); - if (gh_number_p(prop)) - { - default_abbrev_i_ = gh_scm2int (prop); - } + TRANSLATOR_DECLARATIONS(Stem_engraver); +protected: + virtual void acknowledge_grob (Grob_info); + virtual void stop_translation_timestep (); + virtual bool try_music (Music*); + +private: + Grob *stem_; + Grob *tremolo_; + Music *rhythmic_ev_; + Music* tremolo_ev_; +}; + +Stem_engraver::Stem_engraver () +{ + tremolo_ev_ = 0; + stem_ = 0; + tremolo_ = 0; + rhythmic_ev_ =0; } + void -Stem_engraver::acknowledge_element(Score_element_info i) +Stem_engraver::acknowledge_grob (Grob_info i) { - if (Rhythmic_head * h = dynamic_cast (i.elem_l_)) + Grob* h = i.grob_; + if (Rhythmic_head::has_interface (h)) { - if (h->stem_l_) + if (Rhythmic_head::get_stem (h)) return; + + /* Reverted to the old method so chord tremolos work again. /MB + */ + int duration_log = 0; + + Music * m = i.music_cause (); + if (m->is_mus_type ("rhythmic-event")) + duration_log = unsmob_duration (m->get_property ("duration"))-> duration_log (); - Rhythmic_req * r = dynamic_cast (i.req_l_); - int duration_log = r->duration_.durlog_i_; - if (!stem_p_) + if (!stem_) { - stem_p_ = new Stem; - stem_p_->flag_i_ = duration_log; + stem_ = make_item ("Stem"); - if (abbrev_req_l_) + stem_->set_property ("duration-log", gh_int2scm (duration_log)); + + if (tremolo_ev_) { /* - 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_; + Stem tremolo is never applied to a note by default, + is must me evuested. 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 = gh_scm2int (tremolo_ev_->get_property ("tremolo-type")); + SCM f = get_property ("tremoloFlags"); + if (!requested_type) + if (gh_number_p (f)) + requested_type = gh_scm2int (f); + else + requested_type = 8; else - default_abbrev_i_ = t; + daddy_context_->set_property ("tremoloFlags", gh_int2scm (requested_type)); + + int tremolo_flags = intlog2 (requested_type) - 2 + - (duration_log > 2 ? duration_log - 2 : 0); + if (tremolo_flags <= 0) + { + tremolo_ev_->origin()->warning (_("tremolo duration is too long")); + tremolo_flags = 0; + } - if (t) + if (tremolo_flags) { - 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); + tremolo_ = make_item ("StemTremolo"); + announce_grob(tremolo_, 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", + gh_int2scm (tremolo_flags)); + tremolo_->set_parent (stem_, X_AXIS); + stem_->set_property ("tremolo-flag", tremolo_->self_scm ()); } } - // must give the request, to preserve the rhythmic info. - announce_element (Score_element_info (stem_p_, r)); + /* + We announce the cause of the head as cause of the stem. + The stem needs a rhythmic structure to fit it into a beam. */ + announce_grob(stem_, i.music_cause ()->self_scm()); } - if (stem_p_->flag_i_ != duration_log) + if (Stem::duration_log (stem_) != duration_log) { - r->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << stem_p_->flag_i_)); + i.music_cause ()->origin ()->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << Stem::duration_log (stem_)) + + _f ("Don't you want polyphonic voices instead?") + ); } - stem_p_->add_head (h); + Stem::add_head (stem_,h); } } void -Stem_engraver::do_pre_move_processing() +Stem_engraver::stop_translation_timestep () { - if (abbrev_p_) + if (tremolo_) { - abbrev_p_->set_stem (stem_p_); - typeset_element (abbrev_p_); - abbrev_p_ = 0; + Stem_tremolo::set_stem (tremolo_, stem_); + typeset_grob (tremolo_); + tremolo_ = 0; } - if (stem_p_) + if (stem_) { - SCM prop = get_property ("verticalDirection", 0); - if (gh_number_p(prop)) + SCM prop = get_property ("stemLeftBeamCount"); + if (gh_number_p (prop)) { - stem_p_->dir_ = to_dir (prop); - stem_p_->set_elt_property (dir_forced_scm_sym, SCM_BOOL_T); + Stem::set_beaming (stem_,gh_scm2int (prop),LEFT); + daddy_context_->unset_property (ly_symbol2scm ("stemLeftBeamCount")); } - - Translator_group* which; - prop = get_property ("stemLeftBeamCount", &which); - if (gh_number_p(prop)) + prop = get_property ("stemRightBeamCount"); + if (gh_number_p (prop)) { - stem_p_->beams_i_drul_[LEFT] = gh_scm2int (prop); - ((Translator_group*)which)->set_property ("stemLeftBeamCount", SCM_UNDEFINED); + Stem::set_beaming (stem_,gh_scm2int (prop), RIGHT); + daddy_context_->unset_property (ly_symbol2scm ("stemRightBeamCount")); } - prop = get_property ("stemRightBeamCount", &which); - if (gh_number_p(prop)) - { - stem_p_->beams_i_drul_[RIGHT] = gh_scm2int (prop); - ((Translator_group*)which)->set_property ("stemRightBeamCount", SCM_UNDEFINED); - } - typeset_element(stem_p_); - stem_p_ = 0; + + typeset_grob (stem_); + stem_ = 0; } - abbrev_req_l_ = 0; + + + tremolo_ev_ = 0; } bool -Stem_engraver::do_try_music (Music* r) +Stem_engraver::try_music (Music* r) { - if (Tremolo_req* a = dynamic_cast (r)) + if (r->is_mus_type ("tremolo-event")) { - abbrev_req_l_ = a; + tremolo_ev_ = r; return true; } return false; } - -ADD_THIS_TRANSLATOR(Stem_engraver); +ENTER_DESCRIPTION(Stem_engraver, +/* descr */ "Create stems and single-stem tremolos. It also works together with " +"the beam engraver for overriding beaming.", +/* creats*/ "Stem StemTremolo", +/* accepts */ "tremolo-event", +/* acks */ "rhythmic-head-interface", +/* reads */ "tremoloFlags stemLeftBeamCount stemRightBeamCount", +/* write */ "");