-/*
- beam-engraver.cc -- implement Beam_engraver
-
- source file of the GNU LilyPond music typesetter
-
- (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-#include "timing-engraver.hh"
-#include "engraver-group-engraver.hh"
-#include "beam-engraver.hh"
-#include "musical-request.hh"
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 1998--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+ 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 <http://www.gnu.org/licenses/>.
+*/
+
#include "beam.hh"
+#include "beaming-pattern.hh"
+#include "context.hh"
+#include "directional-element-interface.hh"
+#include "drul-array.hh"
+#include "duration.hh"
+#include "engraver.hh"
+#include "international.hh"
+#include "item.hh"
+#include "rest.hh"
+#include "spanner.hh"
+#include "stream-event.hh"
#include "stem.hh"
+#include "unpure-pure-container.hh"
#include "warn.hh"
-#include "time-description.hh"
-#include "beaming.hh"
-#include "score-engraver.hh"
-Beam_engraver::Beam_engraver ()
+#include "translator.icc"
+
+class Beam_engraver : public Engraver
{
- beam_p_ = 0;
- finished_beam_p_ =0;
- finished_beam_info_p_=0;
- beam_info_p_ =0;
- reqs_drul_[LEFT] = reqs_drul_[RIGHT] =0;
- prev_start_req_ =0;
+public:
+ void acknowledge_stem (Grob_info);
+ void acknowledge_rest (Grob_info);
+ void listen_beam (Stream_event *);
+
+protected:
+ Stream_event *start_ev_;
+
+ Spanner *finished_beam_;
+ Spanner *beam_;
+ Stream_event *prev_start_ev_;
+
+ Stream_event *stop_ev_;
+
+ Direction forced_direction_;
+
+ Beaming_pattern *beam_info_;
+ Beaming_pattern *finished_beam_info_;
+
+ /// location within measure where beam started.
+ Moment beam_start_location_;
+
+ /// moment (global time) where beam started.
+ Moment beam_start_mom_;
+
+ Beaming_options beaming_options_;
+ Beaming_options finished_beaming_options_;
+
+ void typeset_beam ();
+ void set_melisma (bool);
+
+ Moment last_stem_added_at_;
+ void stop_translation_timestep ();
+ void start_translation_timestep ();
+ virtual void finalize ();
+
+ void process_music ();
+
+ virtual bool valid_start_point ();
+ virtual bool valid_end_point ();
+
+public:
+ TRANSLATOR_DECLARATIONS (Beam_engraver);
+};
+
+/*
+ Hmm. this isn't necessary, since grace beams and normal beams are
+ always nested.
+*/
+bool
+Beam_engraver::valid_start_point ()
+{
+ Moment n = now_mom ();
+
+ return n.grace_part_ == Rational (0);
}
bool
-Beam_engraver::do_try_music (Music *m)
+Beam_engraver::valid_end_point ()
{
- if (Span_req * c = dynamic_cast<Span_req*>(m))
- {
- if (c->span_type_str_ != "beam")
- return false;
-
- Direction d =c->span_dir_;
-
- if (d == STOP && !beam_p_)
- {
- m->warning (_ ("no beam to end"));
- return false;
- }
- reqs_drul_[d ] = c;
- return true;
- }
- return false;
+ return valid_start_point ();
}
+Beam_engraver::Beam_engraver (Context *c)
+ : Engraver (c)
+{
+ beam_ = 0;
+ finished_beam_ = 0;
+ finished_beam_info_ = 0;
+ beam_info_ = 0;
+ forced_direction_ = CENTER;
+ stop_ev_ = 0;
+ start_ev_ = 0;
+ prev_start_ev_ = 0;
+}
void
-Beam_engraver::do_process_requests ()
+Beam_engraver::listen_beam (Stream_event *ev)
{
- if (reqs_drul_[STOP])
+ Direction d = to_dir (ev->get_property ("span-direction"));
+
+ if (d == START && valid_start_point ())
{
- if (!beam_p_)
- reqs_drul_[STOP]->warning (_("no beam to end"));
- prev_start_req_ =0;
- finished_beam_p_ = beam_p_;
- finished_beam_info_p_ = beam_info_p_;
-
- beam_info_p_ =0;
- beam_p_ = 0;
+ ASSIGN_EVENT_ONCE (start_ev_, ev);
+
+ Direction updown = to_dir (ev->get_property ("direction"));
+ if (updown)
+ forced_direction_ = updown;
}
+ else if (d == STOP && valid_end_point ())
+ ASSIGN_EVENT_ONCE (stop_ev_, ev);
+}
+void
+Beam_engraver::set_melisma (bool ml)
+{
+ SCM b = get_property ("autoBeaming");
+ if (!to_boolean (b))
+ context ()->set_property ("beamMelismaBusy", ml ? SCM_BOOL_T : SCM_BOOL_F);
+}
- if (beam_p_)
+void
+Beam_engraver::process_music ()
+{
+ if (start_ev_)
{
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
- {
- e = dynamic_cast<Score_engraver*> (t);
- }
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks ();
+ if (beam_)
+ {
+ start_ev_->origin ()->warning (_ ("already have a beam"));
+ return;
+ }
+
+ set_melisma (true);
+ prev_start_ev_ = start_ev_;
+ beam_ = make_spanner ("Beam", start_ev_->self_scm ());
+
+ Moment mp (robust_scm2moment (get_property ("measurePosition"),
+ Moment (0)));
+
+ beam_start_location_ = mp;
+ beam_start_mom_ = now_mom ();
+
+ beaming_options_.from_context (context ());
+ beam_info_ = new Beaming_pattern;
+ /* urg, must copy to Auto_beam_engraver too */
}
-
- if (reqs_drul_[START])
+
+ typeset_beam ();
+ if (stop_ev_ && beam_)
{
- if (beam_p_)
- {
- reqs_drul_[START]->warning (_ ("Already have a Beam"));
- return;
- }
-
- prev_start_req_ = reqs_drul_[START];
- beam_p_ = new Beam;
-
- Translator * t = daddy_grav_l ()->get_simple_translator ("Timing_engraver");
- Timing_engraver *timer = dynamic_cast<Timing_engraver*> (t);
- beam_start_location_ = (t) ? timer->time_.whole_in_measure_ : Moment (0);
- beam_start_mom_ = now_mom();
- beam_info_p_ = new Beaming_info_list;
-
-
-
- Scalar prop = get_property ("beamslopedamping", 0);
- if (prop.isnum_b ())
- beam_p_->set_elt_property (damping_scm_sym, gh_int2scm( prop));
-
- prop = get_property ("beamquantisation", 0);
- if (prop.isnum_b ())
- beam_p_->quantisation_ = (Beam::Quantisation)(int)prop;
-
- announce_element (Score_element_info (beam_p_, reqs_drul_[START]));
+ announce_end_grob (beam_, stop_ev_->self_scm ());
+
}
}
void
Beam_engraver::typeset_beam ()
{
- if (finished_beam_p_)
+ if (finished_beam_)
{
- finished_beam_info_p_->beamify ();
-
- finished_beam_p_->set_beaming (finished_beam_info_p_);
- typeset_element (finished_beam_p_);
- delete finished_beam_info_p_;
- finished_beam_info_p_ =0;
- finished_beam_p_ = 0;
-
- reqs_drul_[STOP] = 0;
+ Grob *stem = finished_beam_->get_bound (RIGHT);
+ if (!stem)
+ {
+ stem = finished_beam_->get_bound (LEFT);
+ if (stem)
+ finished_beam_->set_bound (RIGHT, stem);
+ }
+
+ if (stem && forced_direction_)
+ set_grob_direction (stem, forced_direction_);
+
+ forced_direction_ = CENTER;
+ finished_beam_info_->beamify (finished_beaming_options_);
+
+ Beam::set_beaming (finished_beam_, finished_beam_info_);
+
+ delete finished_beam_info_;
+ finished_beam_info_ = 0;
+ finished_beam_ = 0;
+
}
}
void
-Beam_engraver::do_post_move_processing ()
+Beam_engraver::start_translation_timestep ()
{
- reqs_drul_ [START] =0;
+ start_ev_ = 0;
+
+ if (beam_)
+ set_melisma (true);
}
void
-Beam_engraver::do_pre_move_processing ()
+Beam_engraver::stop_translation_timestep ()
{
- typeset_beam ();
+ if (stop_ev_)
+ {
+ finished_beam_ = beam_;
+ finished_beam_info_ = beam_info_;
+ finished_beaming_options_ = beaming_options_;
+
+ stop_ev_ = 0;
+ beam_ = 0;
+ beam_info_ = 0;
+ typeset_beam ();
+ set_melisma (false);
+ }
}
void
-Beam_engraver::do_removal_processing ()
+Beam_engraver::finalize ()
{
typeset_beam ();
- if (beam_p_)
+ if (beam_)
{
- prev_start_req_->warning (_ ("unfinished beam"));
- finished_beam_p_ = beam_p_;
- finished_beam_info_p_ = beam_info_p_;
- typeset_beam ();
+ prev_start_ev_->origin ()->warning (_ ("unterminated beam"));
+
+ /*
+ we don't typeset it, (we used to, but it was commented
+ out. Reason unknown) */
+ beam_->suicide ();
+ delete beam_info_;
}
}
void
-Beam_engraver::acknowledge_element (Score_element_info info)
+Beam_engraver::acknowledge_rest (Grob_info info)
{
- if (beam_p_)
+ if (beam_
+ && !scm_is_number (info.grob ()->get_property_data ("staff-position")))
+ chain_offset_callback (info.grob (),
+ Unpure_pure_container::make_smob
+ (Beam::rest_collision_callback_proc,
+ Beam::pure_rest_collision_callback_proc),
+ Y_AXIS);
+}
+
+void
+Beam_engraver::acknowledge_stem (Grob_info info)
+{
+ if (!beam_)
+ return;
+
+ Moment now = now_mom ();
+ if (!valid_start_point ())
+ return;
+
+ // It's suboptimal that we don't support callbacks returning ##f,
+ // but this makes beams have no effect on "stems" reliably in
+ // TabStaff when \tabFullNotation is switched off: the real stencil
+ // callback for beams is called quite late in the process, and we
+ // don't want to trigger it early.
+ if (scm_is_false (beam_->get_property_data ("stencil")))
+ return;
+
+ Item *stem = dynamic_cast<Item *> (info.grob ());
+ if (Stem::get_beam (stem))
+ return;
+
+ Stream_event *ev = info.ultimate_event_cause ();
+ if (!ev->in_event_class ("rhythmic-event"))
{
- Stem* stem_l = dynamic_cast<Stem *> (info.elem_l_);
- if (!stem_l || stem_l->beam_l_)
- return;
-
-
- bool stem_grace = stem_l->get_elt_property (grace_scm_sym) != SCM_BOOL_F;
-
- if (get_property ("weAreGraceContext",0).to_bool () != stem_grace)
- return;
-
- Rhythmic_req *rhythmic_req = dynamic_cast <Rhythmic_req *> (info.req_l_);
- if (!rhythmic_req)
- {
- String s = _ ("Stem must have Rhythmic structure");
- if (info.req_l_)
- info.req_l_->warning (s);
- else
- ::warning (s);
-
- return;
- }
-
- if (rhythmic_req->duration_.durlog_i_<= 2)
- {
- rhythmic_req->warning (_ ("Stem doesn't fit in beam"));
- prev_start_req_->warning (_ ("Beam was started here"));
- return;
- }
-
- stem_l->flag_i_ = rhythmic_req->duration_.durlog_i_;
- Moment stem_location = now_mom () - beam_start_mom_ + beam_start_location_;
- beam_info_p_->add_stem (stem_location, rhythmic_req->duration_.durlog_i_ - 2);
- beam_p_->add_stem (stem_l);
+ info.grob ()->warning (_ ("stem must have Rhythmic structure"));
+ return;
}
+
+ last_stem_added_at_ = now;
+
+ Duration *stem_duration = unsmob<Duration> (ev->get_property ("duration"));
+ int durlog = stem_duration->duration_log ();
+ //int durlog = unsmob<Duration> (ev->get_property ("duration"))->duration_log ();
+ if (durlog <= 2)
+ {
+ ev->origin ()->warning (_ ("stem does not fit in beam"));
+ prev_start_ev_->origin ()->warning (_ ("beam was started here"));
+ /*
+ don't return, since
+
+ [r4 c8] can just as well be modern notation.
+ */
+ }
+
+ if (forced_direction_)
+ set_grob_direction (stem, forced_direction_);
+
+ stem->set_property ("duration-log", scm_from_int (durlog));
+ Moment stem_location = now - beam_start_mom_ + beam_start_location_;
+ beam_info_->add_stem (stem_location,
+ max (durlog - 2, 0),
+ Stem::is_invisible (stem),
+ stem_duration->factor (),
+ (to_boolean (stem->get_property ("tuplet-start"))));
+ Beam::add_stem (beam_, stem);
+}
+
+
+void
+Beam_engraver::boot ()
+{
+ ADD_LISTENER (Beam_engraver, beam);
+ ADD_ACKNOWLEDGER (Beam_engraver, stem);
+ ADD_ACKNOWLEDGER (Beam_engraver, rest);
}
+ADD_TRANSLATOR (Beam_engraver,
+ /* doc */
+ "Handle @code{Beam} events by engraving beams. If omitted,"
+ " then notes are printed with flags instead of beams.",
+
+ /* create */
+ "Beam ",
+
+ /* read */
+ "baseMoment "
+ "beamMelismaBusy "
+ "beatStructure "
+ "subdivideBeams ",
+
+ /* write */
+ "forbidBreak"
+ );
+
+class Grace_beam_engraver : public Beam_engraver
+{
+public:
+ TRANSLATOR_DECLARATIONS (Grace_beam_engraver);
+ TRANSLATOR_INHERIT (Beam_engraver);
+
+protected:
+ virtual bool valid_start_point ();
+ virtual bool valid_end_point ();
+};
+
+Grace_beam_engraver::Grace_beam_engraver (Context *c)
+ : Beam_engraver (c)
+{
+}
+
+bool
+Grace_beam_engraver::valid_start_point ()
+{
+ Moment n = now_mom ();
+
+ return n.grace_part_ != Rational (0);
+}
+
+bool
+Grace_beam_engraver::valid_end_point ()
+{
+ return beam_ && valid_start_point ();
+}
+
+void
+Grace_beam_engraver::boot ()
+{
+ ADD_LISTENER (Grace_beam_engraver, beam);
+ ADD_ACKNOWLEDGER (Grace_beam_engraver, stem);
+ ADD_ACKNOWLEDGER (Grace_beam_engraver, rest);
+}
+
+ADD_TRANSLATOR (Grace_beam_engraver,
+ /* doc */
+ "Handle @code{Beam} events by engraving beams. If omitted,"
+ " then notes are printed with flags instead of beams. Only"
+ " engraves beams when we are at grace points in time.",
+
+ /* create */
+ "Beam ",
+
+ /* read */
+ "baseMoment "
+ "beamMelismaBusy "
+ "beatStructure "
+ "subdivideBeams ",
+ /* write */
+ ""
+ );
-ADD_THIS_TRANSLATOR(Beam_engraver);
projects / lilypond.git / blobdiff