/*
- beam-grav.cc -- implement Beam_engraver
+ beam-engraver.cc -- implement Beam_engraver
source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1998--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "duration-convert.hh"
-#include "time-description.hh"
-#include "beam-engraver.hh"
-#include "stem.hh"
+
#include "beam.hh"
-#include "musical-request.hh"
-#include "grouping.hh"
-#include "p-col.hh"
+#include "beaming-pattern.hh"
+#include "context.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 "warn.hh"
-Beam_engraver::Beam_engraver()
+#include "translator.icc"
+
+class Beam_engraver : public Engraver
{
- span_reqs_drul_[LEFT] = span_reqs_drul_[RIGHT] =0;
- beam_p_ =0;
- current_grouping_p_ =0;
-}
+public:
+ DECLARE_ACKNOWLEDGER (stem);
+ DECLARE_ACKNOWLEDGER (rest);
+
+protected:
+ Stream_event *start_ev_;
+
+ Spanner *finished_beam_;
+ Spanner *beam_;
+ Stream_event *prev_start_ev_;
+
+ Stream_event *stop_ev_;
+
+ 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 ();
+
+ DECLARE_TRANSLATOR_LISTENER (beam);
+public:
+ TRANSLATOR_DECLARATIONS (Beam_engraver);
+};
+
+/*
+ Hmm. this isn't necessary, since grace beams and normal beams are
+ always nested.
+*/
bool
-Beam_engraver::do_try_music (Music*r)
+Beam_engraver::valid_start_point ()
{
- Beam_req* b = dynamic_cast <Beam_req *> (r);
- if (!b)
- return false;
+ Moment n = now_mom ();
- if (bool (beam_p_) == bool (b->spantype_ == START))
- return false;
+ return n.grace_part_ == Rational (0);
+}
- Direction d = (!beam_p_) ? LEFT : RIGHT;
- if (span_reqs_drul_[d] && !span_reqs_drul_[d]->equal_b (b))
- return false;
+bool
+Beam_engraver::valid_end_point ()
+{
+ return valid_start_point ();
+}
- span_reqs_drul_[d] = b;
- return true;
+Beam_engraver::Beam_engraver ()
+{
+ beam_ = 0;
+ finished_beam_ = 0;
+ finished_beam_info_ = 0;
+ beam_info_ = 0;
+ stop_ev_ = 0;
+ start_ev_ = 0;
+ prev_start_ev_ = 0;
}
+IMPLEMENT_TRANSLATOR_LISTENER (Beam_engraver, beam);
void
-Beam_engraver::do_process_requests()
+Beam_engraver::listen_beam (Stream_event *ev)
{
- if (beam_p_ || !span_reqs_drul_[LEFT])
- return;
+ Direction d = to_dir (ev->get_property ("span-direction"));
- current_grouping_p_ = new Rhythmic_grouping;
- beam_p_ = new Beam;
-
- Scalar prop = get_property ("beamslopedamping");
- if (prop.isnum_b ())
- beam_p_->damping_i_ = prop;
+ if (d == START && valid_start_point ())
+ ASSIGN_EVENT_ONCE (start_ev_, ev);
+ else if (d == STOP && valid_end_point ())
+ ASSIGN_EVENT_ONCE (stop_ev_, ev);
+}
- prop = get_property ("beamquantisation");
- if (prop.isnum_b ())
- beam_p_->quantisation_ = (Beam::Quantisation)(int)prop;
-
- announce_element (Score_element_info (beam_p_, span_reqs_drul_[LEFT]));
+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);
}
void
-Beam_engraver::do_pre_move_processing()
+Beam_engraver::process_music ()
{
- if (!beam_p_ || !span_reqs_drul_[RIGHT])
- return;
+ if (start_ev_)
+ {
+ if (beam_)
+ {
+ start_ev_->origin ()->warning (_ ("already have a beam"));
+ return;
+ }
- Rhythmic_grouping const * rg_C = get_staff_info().rhythmic_C_;
- rg_C->extend (current_grouping_p_->interval());
- beam_p_->set_grouping (*rg_C, *current_grouping_p_);
- typeset_element (beam_p_);
- beam_p_ = 0;
+ 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)));
- delete current_grouping_p_;
- current_grouping_p_ = 0;
+ beam_start_location_ = mp;
+ beam_start_mom_ = now_mom ();
- span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;
+ beaming_options_.from_context (context ());
+ beam_info_ = new Beaming_pattern;
+ /* urg, must copy to Auto_beam_engraver too */
+ }
+
+ typeset_beam ();
+ if (stop_ev_ && beam_)
+ {
+ announce_end_grob (beam_, stop_ev_->self_scm ());
+
+ }
}
void
-Beam_engraver::do_removal_processing()
+Beam_engraver::typeset_beam ()
{
- if (beam_p_)
+ if (finished_beam_)
{
- span_reqs_drul_[LEFT]->warning (_("unterminated beam"));
- typeset_element (beam_p_);
- beam_p_ =0;
+ if (!finished_beam_->get_bound (RIGHT))
+ finished_beam_->set_bound (RIGHT, finished_beam_->get_bound (LEFT));
+
+ 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::start_translation_timestep ()
+{
+ start_ev_ = 0;
+
+ if (beam_)
+ {
+ set_melisma (true);
+ }
+}
void
-Beam_engraver::acknowledge_element (Score_element_info i)
+Beam_engraver::stop_translation_timestep ()
{
- Stem* s = dynamic_cast<Stem *> (i.elem_l_);
- if (!beam_p_ || !s)
- return;
+ 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);
+ }
+}
- if (!dynamic_cast <Rhythmic_req *> (i.req_l_))
+void
+Beam_engraver::finalize ()
+{
+ typeset_beam ();
+ if (beam_)
{
- ::warning ( _("Stem must have Rhythmic structure."));
- return;
+ 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_;
}
+}
- Rhythmic_req *rhythmic_req = dynamic_cast <Rhythmic_req *> (i.req_l_);
- if (rhythmic_req->duration_.durlog_i_<= 2)
+void
+Beam_engraver::acknowledge_rest (Grob_info info)
+{
+ if (beam_
+ && !scm_is_number (info.grob ()->get_property_data ("staff-position")))
{
- rhythmic_req->warning (_ ("stem doesn't fit in beam"));
- return;
+ chain_offset_callback (info.grob(),
+ Beam::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;
- /*
- TODO: do something sensible if it doesn't fit in the beam.
- */
- Moment start = get_staff_info().time_C_->whole_in_measure_;
+ Item *stem = dynamic_cast<Item *> (info.grob ());
+ if (Stem::get_beam (stem))
+ return;
- if (!current_grouping_p_->child_fit_b (start))
+
+
+ Stream_event *ev = info.ultimate_event_cause ();
+ if (!ev->in_event_class ("rhythmic-event"))
{
- String s (_("please fix me") + ": "
- + _f ("stem at %s doesn't fit in beam", now_moment ().str ()));
- if (i.req_l_)
- i.req_l_->warning(s);
- else
- warning (s);
+ info.grob ()->warning (_ ("stem must have Rhythmic structure"));
+ return;
}
- else
+
+ last_stem_added_at_ = now;
+ int durlog = unsmob_duration (ev->get_property ("duration"))->duration_log ();
+ if (durlog <= 2)
{
- current_grouping_p_->add_child (start, rhythmic_req->duration ());
- s->flag_i_ = rhythmic_req->duration_.durlog_i_;
- beam_p_->add_stem (s);
+ 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.
+ */
}
+
+ 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));
+ Beam::add_stem (beam_, stem);
+}
+
+ADD_ACKNOWLEDGER (Beam_engraver, stem);
+ADD_ACKNOWLEDGER (Beam_engraver, rest);
+
+ADD_TRANSLATOR (Beam_engraver,
+ /* doc */
+
+ "Handles Beam events by engraving Beams. If omitted, then notes will be "
+ "printed with flags instead of beams.",
+
+ /* create */ "Beam",
+
+ /* read */
+ "beamMelismaBusy "
+ "beatLength "
+ "subdivideBeams "
+ ,
+ /* write */
+ "forbidBreak");
+
+class Grace_beam_engraver : public Beam_engraver
+{
+public:
+ TRANSLATOR_DECLARATIONS (Grace_beam_engraver);
+
+ DECLARE_TRANSLATOR_LISTENER (beam);
+
+protected:
+ virtual bool valid_start_point ();
+ virtual bool valid_end_point ();
+};
+
+Grace_beam_engraver::Grace_beam_engraver ()
+{
+}
+
+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 ();
+}
+
+/*
+ Ugh, C&P code.
+ */
+IMPLEMENT_TRANSLATOR_LISTENER (Grace_beam_engraver, beam);
+void
+Grace_beam_engraver::listen_beam (Stream_event *ev)
+{
+ Direction d = to_dir (ev->get_property ("span-direction"));
+
+ if (d == START && valid_start_point ())
+ start_ev_ = ev;
+ else if (d == STOP && valid_end_point ())
+ stop_ev_ = ev;
}
-ADD_THIS_TRANSLATOR(Beam_engraver);
+
+ADD_ACKNOWLEDGER (Grace_beam_engraver, stem);
+ADD_ACKNOWLEDGER (Grace_beam_engraver, rest);
+
+ADD_TRANSLATOR (Grace_beam_engraver,
+
+ /* doc */
+
+ "Handles Beam events by engraving Beams. If omitted, then notes will "
+ "be printed with flags instead of beams. Only engraves beams when we "
+ " are at grace points in time. ",
+
+ /* create */ "Beam",
+ /* read */
+ "beamMelismaBusy "
+ "beatLength "
+ "subdivideBeams "
+ ,
+ /* write */ "");
+
projects / lilypond.git / blobdiff