X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstem-engraver.cc;h=797406b4fbc062d28aa0cc9af6f152d3435073ce;hb=47db9a3883d726ca53e2133a3b2298f78dd6a32e;hp=cdb819767c0e81475436694b0bc91aa7233008d1;hpb=01d84d552854fb399bd0e819502c6c2db2a1b214;p=lilypond.git diff --git a/lily/stem-engraver.cc b/lily/stem-engraver.cc index cdb819767c..62c0974f9f 100644 --- a/lily/stem-engraver.cc +++ b/lily/stem-engraver.cc @@ -1,140 +1,253 @@ /* - stem-grav.cc -- implement Stem_engraver + This file is part of LilyPond, the GNU music typesetter. - source file of the GNU LilyPond music typesetter + Copyright (C) 1997--2015 Han-Wen Nienhuys - (c) 1997--1999 Han-Wen Nienhuys + LilyPond is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + LilyPond is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with LilyPond. If not, see . */ -#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" +#include "stream-event.hh" + +#include "translator.icc" -Stem_engraver::Stem_engraver() +class Stem_engraver : public Engraver +{ + Grob *stem_; + Grob *tremolo_; + vector maybe_flags_; + Stream_event *rhythmic_ev_; + Stream_event *tremolo_ev_; + bool tuplet_start_; + + TRANSLATOR_DECLARATIONS (Stem_engraver); + +protected: + void make_stem (Grob_info, bool); + + DECLARE_TRANSLATOR_LISTENER (tremolo); + DECLARE_TRANSLATOR_LISTENER (tuplet_span); + DECLARE_ACKNOWLEDGER (rhythmic_head); + void stop_translation_timestep (); + void finalize (); + void kill_unused_flags (); +}; + +Stem_engraver::Stem_engraver () { - abbrev_req_l_ = 0; - stem_p_ = 0; - abbrev_p_ = 0; - default_abbrev_i_ = 16; - rhythmic_req_l_ =0; + tremolo_ev_ = 0; + stem_ = 0; + tremolo_ = 0; + rhythmic_ev_ = 0; + tuplet_start_ = false; } void -Stem_engraver::do_creation_processing () +Stem_engraver::make_stem (Grob_info gi, bool tuplet_start) { - SCM prop = get_property ("abbrev", 0); - if (gh_number_p(prop)) + /* 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 ()); + if (tuplet_start) + stem_->set_property ("tuplet-start", SCM_BOOL_T); + (void) make_item ("StemStub", gi.grob ()->self_scm ()); + if (tremolo_ev_) { - default_abbrev_i_ = gh_scm2int (prop); + /* Stem tremolo is never applied to a note by default, + it must be requested. But there is a default for the + tremolo value: + + c4:8 c c: + + the first and last (quarter) note both get one tremolo flag. */ + int requested_type + = robust_scm2int (tremolo_ev_->get_property ("tremolo-type"), 8); + + /* + we take the duration log from the Event, since the duration-log + for a note head is always <= 2. + */ + Stream_event *ev = gi.event_cause (); + Duration *dur = Duration::unsmob (ev->get_property ("duration")); + + int tremolo_flags = intlog2 (requested_type) - 2 + - (dur->duration_log () > 2 ? dur->duration_log () - 2 : 0); + if (tremolo_flags <= 0) + { + tremolo_ev_->origin ()->warning (_ ("tremolo duration is too long")); + tremolo_flags = 0; + } + + 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::acknowledge_element(Score_element_info i) +Stem_engraver::acknowledge_rhythmic_head (Grob_info gi) { - if (Rhythmic_head * h = dynamic_cast (i.elem_l_)) + if (Rhythmic_head::get_stem (gi.grob ())) + return; + + Stream_event *cause = gi.event_cause (); + if (!cause) + return; + Duration *d = Duration::unsmob (cause->get_property ("duration")); + if (!d) + return; + + if (!stem_) + make_stem (gi, tuplet_start_); + + int ds = Stem::duration_log (stem_); + int dc = d->duration_log (); + + // half notes and quarter notes all have compatible stems. + // Longas are done differently (oops?), so we can't unify + // them with the other stemmed notes. + if (ds == 1) + ds = 2; + if (dc == 1) + dc = 2; + // whole notes and brevis both have no stems + if (ds == -1) + ds = 0; + if (dc == -1) + dc = 0; + + if (ds != dc) { - if (h->stem_l ()) - return; - - Rhythmic_req * r = dynamic_cast (i.req_l_); - int duration_log = r->duration_.durlog_i_; - if (!stem_p_) - { - 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 (stem_p_->flag_i_ != duration_log) - { - r->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << stem_p_->flag_i_)); - } - - stem_p_->add_head (h); + gi.event_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d/%d)", + ds < 0 ? 1 << -ds : 1, + ds > 0 ? 1 << ds : 1)); + gi.event_cause ()->origin ()->warning (_ ("maybe input should specify polyphonic voices")); } + + Stem::add_head (stem_, gi.grob ()); + + if (Stem::is_normal_stem (stem_) + && Stem::duration_log (stem_) > 2) + { + Item *flag = make_item ("Flag", stem_->self_scm ()); + flag->set_parent (stem_, X_AXIS); + stem_->set_object ("flag", flag->self_scm ()); + maybe_flags_.push_back (flag); + } + if (tuplet_start_) + stem_->set_property ("tuplet-start", SCM_BOOL_T); } void -Stem_engraver::do_pre_move_processing() +Stem_engraver::kill_unused_flags () { - if (abbrev_p_) - { - abbrev_p_->set_stem (stem_p_); - typeset_element (abbrev_p_); - abbrev_p_ = 0; - } + for (vsize i = 0; i < maybe_flags_.size (); i++) + if (Grob::is_smob (maybe_flags_[i]->get_parent (X_AXIS)->get_object ("beam"))) + maybe_flags_[i]->suicide (); +} - if (stem_p_) +void +Stem_engraver::finalize () +{ + kill_unused_flags (); +} + +void +Stem_engraver::stop_translation_timestep () +{ + if (scm_is_string (get_property ("whichBar"))) + kill_unused_flags (); + + 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)) - { - stem_p_->beams_i_drul_[RIGHT] = gh_scm2int (prop); - ((Translator_group*)which)->set_property ("stemRightBeamCount", SCM_UNDEFINED); - } - - // UGH. Should mark non-forced instead. - SCM dir = stem_p_->get_elt_property ("direction"); - if (gh_number_p (dir) && gh_int2scm (dir)) - { - stem_p_->set_elt_property ("dir-forced", SCM_BOOL_T); - } - - - typeset_element(stem_p_); - stem_p_ = 0; + /* FIXME: junk these properties. */ + SCM prop = get_property ("stemLeftBeamCount"); + if (scm_is_number (prop)) + { + Stem::set_beaming (stem_, scm_to_int (prop), LEFT); + context ()->unset_property (ly_symbol2scm ("stemLeftBeamCount")); + } + prop = get_property ("stemRightBeamCount"); + if (scm_is_number (prop)) + { + Stem::set_beaming (stem_, scm_to_int (prop), RIGHT); + context ()->unset_property (ly_symbol2scm ("stemRightBeamCount")); + } + stem_ = 0; } - abbrev_req_l_ = 0; + tuplet_start_ = false; + tremolo_ev_ = 0; } -bool -Stem_engraver::do_try_music (Music* r) +IMPLEMENT_TRANSLATOR_LISTENER (Stem_engraver, tuplet_span); +void +Stem_engraver::listen_tuplet_span (Stream_event *ev) { - if (Tremolo_req* a = dynamic_cast (r)) + Direction dir = to_dir (ev->get_property ("span-direction")); + if (dir == START) { - abbrev_req_l_ = a; - return true; + // set stem property if stem already exists + if (stem_) + stem_->set_property ("tuplet-start", SCM_BOOL_T); + tuplet_start_ = true; // stash the value for use in later creation } - return false; } +IMPLEMENT_TRANSLATOR_LISTENER (Stem_engraver, tremolo); +void +Stem_engraver::listen_tremolo (Stream_event *ev) +{ + ASSIGN_EVENT_ONCE (tremolo_ev_, ev); +} + +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 ", -ADD_THIS_TRANSLATOR(Stem_engraver); + /* read */ + "stemLeftBeamCount " + "stemRightBeamCount " + "whichBar ", + /* write */ + "" + );