source file of the GNU LilyPond music typesetter
- (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "timing-engraver.hh"
-#include "engraver-group-engraver.hh"
-#include "beam-engraver.hh"
-#include "musical-request.hh"
+
+#include "engraver.hh"
+#include "event.hh"
#include "beam.hh"
#include "stem.hh"
#include "warn.hh"
-#include "time-description.hh"
#include "beaming.hh"
#include "score-engraver.hh"
+#include "rest.hh"
+#include "drul-array.hh"
+#include "item.hh"
+#include "spanner.hh"
+#include "context.hh"
+
+class Beam_engraver : public Engraver
+{
+protected:
+ Music * start_ev_;
+
+ Spanner *finished_beam_;
+ Spanner *beam_;
+ Music * prev_start_ev_;
+
+ Music * now_stop_ev_;
+
+ Beaming_info_list * beam_info_;
+ Beaming_info_list * finished_beam_info_;
+
+ /// location within measure where beam started.
+ Moment beam_start_location_;
+
+ /// moment (global time) where beam started.
+ Moment beam_start_mom_;
+
+ bool subdivide_beams_;
+ Moment beat_length_;
+
+ void typeset_beam ();
+ void set_melisma (bool);
+
+ Moment last_stem_added_at_;
+ virtual void stop_translation_timestep ();
+ virtual void start_translation_timestep ();
+ virtual void finalize ();
+
+ virtual void acknowledge_grob (Grob_info);
+ virtual bool try_music (Music*);
+ virtual 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::valid_end_point ()
+{
+ return valid_start_point ();
+}
Beam_engraver::Beam_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;
+ beam_ = 0;
+ finished_beam_ =0;
+ finished_beam_info_=0;
+ beam_info_ =0;
+ now_stop_ev_ = 0;
+ start_ev_ = 0;
+ prev_start_ev_ =0;
}
bool
-Beam_engraver::do_try_music (Music *m)
+Beam_engraver::try_music (Music *m)
{
- if (Span_req * c = dynamic_cast<Span_req*>(m))
+ if (m->is_mus_type ("beam-event"))
{
- if (c->span_type_str_ != "beam")
+ Direction d = to_dir (m->get_property ("span-direction"));
+ if (d == START && !valid_start_point ())
+ return false;
+ if (d == STOP && !valid_end_point ())
return false;
-
- Direction d =c->span_dir_;
- if (d == STOP && !beam_p_)
+ if (d == START)
+ {
+ start_ev_ = m;
+ }
+ else if (d==STOP)
{
- m->warning (_ ("no beam to end"));
- return false;
+ now_stop_ev_ = m;
}
- reqs_drul_[d ] = c;
return true;
}
return false;
}
+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_process_requests ()
+Beam_engraver::process_music ()
{
- if (reqs_drul_[STOP])
+ if (beam_ && !to_boolean (get_property ("allowBeamBreak")))
{
- 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;
+ get_score_engraver ()->forbid_breaks ();
}
-
- if (beam_p_)
+ if (start_ev_)
{
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
+ if (beam_)
{
- e = dynamic_cast<Score_engraver*> (t);
- }
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks ();
- }
-
- if (reqs_drul_[START])
- {
- if (beam_p_)
- {
- reqs_drul_[START]->warning (_ ("Already have a Beam"));
+ start_ev_->origin ()->warning (_ ("already have a beam"));
return;
}
- prev_start_req_ = reqs_drul_[START];
- beam_p_ = new Beam;
+ 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)));
- 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;
-
+ beam_start_location_ = mp;
+ beam_start_mom_ = now_mom ();
-
- Scalar prop = get_property ("beamslopedamping", 0);
- if (prop.isnum_b ())
- beam_p_->set_elt_property (damping_scm_sym, gh_int2scm( prop));
+ beam_info_ = new Beaming_info_list;
- 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]));
+ /* urg, must copy to Auto_beam_engraver too */
}
+
}
+
void
Beam_engraver::typeset_beam ()
{
- if (finished_beam_p_)
+ if (finished_beam_)
{
- finished_beam_info_p_->beamify ();
+ finished_beam_info_->beamify (beat_length_, subdivide_beams_);
+ Beam::set_beaming (finished_beam_, finished_beam_info_);
- 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;
+ 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);
+
+ subdivide_beams_ = to_boolean (get_property ("subdivideBeams"));
+ beat_length_ = robust_scm2moment (get_property ("beatLength"), Moment (1,4));
+ }
}
void
-Beam_engraver::do_pre_move_processing ()
+Beam_engraver::stop_translation_timestep ()
{
typeset_beam ();
+ if (now_stop_ev_ )
+ {
+ finished_beam_ = beam_;
+ finished_beam_info_ = beam_info_;
+
+ now_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_grob (Grob_info info)
{
- if (beam_p_)
+ if (beam_)
{
- Stem* stem_l = dynamic_cast<Stem *> (info.elem_l_);
- if (!stem_l || stem_l->beam_l_)
- return;
+ if (Rest::has_interface (info.grob_))
+ {
+ info.grob_->add_offset_callback (Beam::rest_collision_callback_proc, Y_AXIS);
+ }
+ else if (Stem::has_interface (info.grob_))
+ {
+ Moment now = now_mom ();
+ if (!valid_start_point ())
+ return ;
+
+ Item *stem = dynamic_cast<Item*> (info.grob_);
+ if (Stem::get_beam (stem))
+ return;
- bool stem_grace = stem_l->get_elt_property (grace_scm_sym) != SCM_BOOL_F;
+ Music* m = info.music_cause ();
+ if (!m->is_mus_type ("rhythmic-event"))
+ {
+ String s = _ ("stem must have Rhythmic structure");
+ if (info.music_cause ())
+ info.music_cause ()->origin ()->warning (s);
+ else
+ ::warning (s);
+
+ return;
+ }
- 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;
- }
+ last_stem_added_at_ = now;
+ int durlog = unsmob_duration (m->get_property ("duration"))-> duration_log ();
+ if (durlog <= 2)
+ {
+ m->origin ()->warning (_ ("stem doesn't 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_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);
+ stem->set_property ("duration-log",
+ scm_int2num (durlog));
+ Moment stem_location = now - beam_start_mom_ + beam_start_location_;
+ beam_info_->add_stem (stem_location,
+ (durlog- 2) >? 0);
+ Beam::add_stem (beam_, stem);
+ }
}
}
-ADD_THIS_TRANSLATOR(Beam_engraver);
+
+
+ENTER_DESCRIPTION (Beam_engraver,
+/* descr */ "Handles Beam events by engraving Beams. If omitted, then notes will be "
+"printed with flags instead of beams.",
+/* creats*/ "Beam",
+/* accepts */ "beam-event",
+/* acks */ "stem-interface rest-interface",
+/* reads */ "beamMelismaBusy beatLength subdivideBeams",
+/* write */ "");
+
+
+class Grace_beam_engraver : public Beam_engraver
+{
+public:
+ TRANSLATOR_DECLARATIONS (Grace_beam_engraver);
+
+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 ();
+}
+
+
+
+ENTER_DESCRIPTION (Grace_beam_engraver,
+/* descr */ "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. "
+,
+/* creats*/ "Beam",
+/* accepts */ "beam-event",
+/* acks */ "stem-interface rest-interface",
+/* reads */ "beamMelismaBusy beatLength allowBeamBreak subdivideBeams",
+/* write */ "");
+
projects / lilypond.git / blobdiff