X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstem-engraver.cc;h=b2720731d34c0fcc3b5de007c6a0fb9cf04065cb;hb=9d8ba512b5a3798265afe769f7f134dbdd01a7d1;hp=e21c8c901234ad7525f1562925f10900852ba323;hpb=9efbad2d9487a05b04423e7e9f062968e8f8eaf4;p=lilypond.git diff --git a/lily/stem-engraver.cc b/lily/stem-engraver.cc index e21c8c9012..b2720731d3 100644 --- a/lily/stem-engraver.cc +++ b/lily/stem-engraver.cc @@ -1,120 +1,265 @@ /* - 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--2012 Han-Wen Nienhuys - (c) 1997--1998 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 "abbrev.hh" +#include "rhythmic-head.hh" +#include "script-interface.hh" +#include "staff-symbol-referencer.hh" +#include "stem-tremolo.hh" +#include "stem.hh" +#include "stream-event.hh" + +#include "translator.icc" + +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() +Stem_engraver::Stem_engraver () { - abbrev_req_l_ = 0; - stem_p_ = 0; - abbrev_p_ = 0; - default_abbrev_i_ = 16; - dir_ = CENTER; + 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) { - Scalar prop = get_property ("abbrev"); - if (prop.isnum_b ()) + /* 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_ = 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"), 0); + SCM f = get_property ("tremoloFlags"); + if (!requested_type) + { + 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)); + + /* + 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 = unsmob_duration (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 (i.elem_l_->is_type_b (Rhythmic_head::static_name())) + if (Rhythmic_head::get_stem (gi.grob ())) + return; + + Stream_event *cause = gi.event_cause (); + if (!cause) + return; + Duration *d = unsmob_duration (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) { - Rhythmic_head *h = (Rhythmic_head*) dynamic_cast (i.elem_l_); - if (!stem_p_) - { - Rhythmic_req * r = dynamic_cast (i.req_l_); - stem_p_ = new Stem; - int durlog_i = r->duration_.durlog_i_; - stem_p_->flag_i_ = durlog_i; - - - 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 Abbreviation; - announce_element (Score_element_info (abbrev_p_, abbrev_req_l_)); - abbrev_p_->abbrev_flags_i_ =intlog2 (t) - (durlog_i>? 2); - } - } - - // must give the request, to preserve the rhythmic info. - announce_element (Score_element_info (stem_p_, r)); - } - 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::kill_unused_flags () +{ + for (vsize i = 0; i < maybe_flags_.size (); i++) + if (unsmob_grob (maybe_flags_[i]->get_parent (X_AXIS)->get_object ("beam"))) + maybe_flags_[i]->suicide (); +} + +void +Stem_engraver::finalize () +{ + kill_unused_flags (); } void -Stem_engraver::do_pre_move_processing() +Stem_engraver::stop_translation_timestep () { - if (abbrev_p_) + if (scm_is_string (get_property ("whichBar"))) + kill_unused_flags (); + + tremolo_ = 0; + if (stem_) { - abbrev_p_->set_stem (stem_p_); - typeset_element (abbrev_p_); - abbrev_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; } - if (stem_p_) + tuplet_start_ = false; + tremolo_ev_ = 0; +} + +IMPLEMENT_TRANSLATOR_LISTENER (Stem_engraver, tuplet_span); +void +Stem_engraver::listen_tuplet_span (Stream_event *ev) +{ + Direction dir = to_dir (ev->get_property ("span-direction")); + if (dir == START) { - Scalar prop = get_property ("ydirection"); - dir_ = prop.isnum_b () ? (Direction)int(prop) : CENTER; - if (dir_) - { - stem_p_->dir_ = dir_; - stem_p_->dir_forced_b_ = true; - } - - typeset_element(stem_p_); - stem_p_ = 0; + // 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 } - abbrev_req_l_ = 0; } -bool -Stem_engraver::do_try_request (Request* r) +IMPLEMENT_TRANSLATOR_LISTENER (Stem_engraver, tremolo); +void +Stem_engraver::listen_tremolo (Stream_event *ev) { - Musical_req* mus_l = dynamic_cast (r); - if (!mus_l) - return false; - - Abbreviation_req* a = dynamic_cast (mus_l); - if (!a) - return false; + ASSIGN_EVENT_ONCE (tremolo_ev_, ev); +} - abbrev_req_l_ = a; +ADD_ACKNOWLEDGER (Stem_engraver, rhythmic_head); - return true; -} +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 ", + + /* read */ + "tremoloFlags " + "stemLeftBeamCount " + "stemRightBeamCount " + "whichBar ", -IMPLEMENT_IS_TYPE_B1(Stem_engraver, Engraver); -ADD_THIS_TRANSLATOR(Stem_engraver); + /* write */ + "" + );