-/*
- beam-engraver.cc -- implement Beam_engraver
-
+/*
+ beam-engraver.cc -- implement Beam_engraver
+
source file of the GNU LilyPond music typesetter
-
- (c) 1998--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-#include "engraver-group-engraver.hh"
+
+ (c) 1998--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
#include "engraver.hh"
-#include "musical-request.hh"
#include "beam.hh"
#include "stem.hh"
#include "warn.hh"
#include "drul-array.hh"
#include "item.hh"
#include "spanner.hh"
+#include "context.hh"
class Beam_engraver : public Engraver
{
- Drul_array<Span_req*> reqs_drul_;
+protected:
+ Music *start_ev_;
+
+ Spanner *finished_beam_;
+ Spanner *beam_;
+ Music *prev_start_ev_;
- Link_array<Stem> stems_;
-
-
- Spanner *finished_beam_p_;
- Spanner *beam_p_;
- Span_req * prev_start_req_;
+ Music *now_stop_ev_;
- Beaming_info_list * beam_info_p_;
- Beaming_info_list * finished_beam_info_p_;
+ 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);
-protected:
+
+ Moment last_stem_added_at_;
virtual void stop_translation_timestep ();
virtual void start_translation_timestep ();
virtual void finalize ();
- virtual void create_grobs ();
+
virtual void acknowledge_grob (Grob_info);
- virtual bool try_music (Music*);
+ virtual bool try_music (Music *);
virtual void process_music ();
+ virtual bool valid_start_point ();
+ virtual bool valid_end_point ();
+
public:
- Beam_engraver ();
- VIRTUAL_COPY_CONS (Translator);
+ 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::try_music (Music *m)
{
- if (Span_req * c = dynamic_cast<Span_req*> (m))
+ if (m->is_mus_type ("beam-event"))
{
- if (scm_equal_p (c->get_mus_property ("span-type"),
- ly_str02scm ("abort")) == SCM_BOOL_T)
+ 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;
+
+ if (d == START)
{
- reqs_drul_[START] = 0;
- reqs_drul_[STOP] = 0;
- if (beam_p_)
- beam_p_->suicide ();
- beam_p_ = 0;
+ start_ev_ = m;
}
- else if (scm_equal_p (c->get_mus_property ("span-type"),
- ly_str02scm ("beam")) == SCM_BOOL_T)
+ else if (d == STOP)
{
-
- Direction d =c->get_span_dir ();
-
- if (d == STOP && !beam_p_)
- {
- m->origin ()->warning (_ ("can't find start of beam"));
- return false;
- }
-
- if (d == STOP)
- {
- SCM m = get_property ("automaticMelismata");
- SCM b = get_property ("noAutoBeaming");
- if (to_boolean (m) && to_boolean (b))
- {
- set_melisma (false);
- }
- }
-
- reqs_drul_[d ] = c;
- return true;
+ now_stop_ev_ = m;
}
+ return true;
}
return false;
}
void
-Beam_engraver::set_melisma (bool m)
+Beam_engraver::set_melisma (bool ml)
{
- daddy_trans_l_->set_property ("beamMelismaBusy", m ? SCM_BOOL_T :SCM_BOOL_F);
+ SCM b = get_property ("autoBeaming");
+ if (!to_boolean (b))
+ context ()->set_property ("beamMelismaBusy", ml ? SCM_BOOL_T : SCM_BOOL_F);
}
void
Beam_engraver::process_music ()
{
- if (reqs_drul_[STOP])
- {
- if (!beam_p_)
- reqs_drul_[STOP]->origin ()->warning (_ ("can't find start of beam"));
- prev_start_req_ =0;
- finished_beam_p_ = beam_p_;
- finished_beam_info_p_ = beam_info_p_;
-
- beam_info_p_ =0;
- beam_p_ = 0;
- }
-
-
- if (beam_p_)
+ if (beam_ && !to_boolean (get_property ("allowBeamBreak")))
{
- 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 ();
+ get_score_engraver ()->forbid_breaks ();
}
-}
-
-void
-Beam_engraver::create_grobs ()
-{
- if (reqs_drul_[START])
+ if (start_ev_)
{
- if (beam_p_)
+ if (beam_)
{
- reqs_drul_[START]->origin ()->warning (_ ("already have a beam"));
+ start_ev_->origin ()->warning (_ ("already have a beam"));
return;
}
- prev_start_req_ = reqs_drul_[START];
- beam_p_ = new Spanner (get_property ("Beam"));
- SCM smp = get_property ("measurePosition");
- Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (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)));
beam_start_location_ = mp;
beam_start_mom_ = now_mom ();
-
- beam_info_p_ = new Beaming_info_list;
-
+
+ beam_info_ = new Beaming_info_list;
+
/* urg, must copy to Auto_beam_engraver too */
-
- announce_grob (beam_p_, reqs_drul_[START]);
}
- reqs_drul_[STOP] = 0;
- reqs_drul_[START] = 0;
}
void
Beam_engraver::typeset_beam ()
{
- if (finished_beam_p_)
+ if (finished_beam_)
{
- finished_beam_info_p_->beamify ();
-
- Beam::set_beaming (finished_beam_p_, finished_beam_info_p_);
- typeset_grob (finished_beam_p_);
- delete finished_beam_info_p_;
- finished_beam_info_p_ =0;
- finished_beam_p_ = 0;
-
- reqs_drul_[STOP] = 0;
+ finished_beam_info_->beamify (beat_length_, subdivide_beams_);
+ 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 ()
{
- reqs_drul_ [START] =0;
- if (beam_p_) {
- SCM m = get_property ("automaticMelismata");
- SCM b = get_property ("noAutoBeaming");
- if (to_boolean (m) && to_boolean (b)) {
+ 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::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::finalize ()
{
typeset_beam ();
- if (beam_p_)
+ if (beam_)
{
- prev_start_req_->origin ()->warning (_ ("unterminated beam"));
+ prev_start_ev_->origin ()->warning (_ ("unterminated beam"));
/*
we don't typeset it, (we used to, but it was commented
out. Reason unknown) */
- beam_p_->suicide ();
- delete beam_info_p_;
+ beam_->suicide ();
+ delete beam_info_;
}
}
void
Beam_engraver::acknowledge_grob (Grob_info info)
{
- if (beam_p_)
+ if (beam_)
{
- if (Rest::has_interface (info.elem_l_))
+ if (Rest::has_interface (info.grob ()))
{
- info.elem_l_->add_offset_callback (Beam::rest_collision_callback_proc, Y_AXIS);
+ info.grob ()->add_offset_callback (Beam::rest_collision_callback_proc, Y_AXIS);
}
- else if (Stem::has_interface (info.elem_l_))
+ else if (Stem::has_interface (info.grob ()))
{
- Moment now = now_mom();
+ Moment now = now_mom ();
- if(bool (now.grace_mom_ ) != bool (beam_start_mom_.grace_mom_))
- return ;
-
- Item *stem_l = dynamic_cast<Item*> (info.elem_l_);
- if (Stem::beam_l (stem_l))
+ if (!valid_start_point ())
return;
- Rhythmic_req *rhythmic_req = dynamic_cast <Rhythmic_req *> (info.req_l_);
- if (!rhythmic_req)
+ Item *stem = dynamic_cast<Item *> (info.grob ());
+ if (Stem::get_beam (stem))
+ return;
+
+ Music *m = info.music_cause ();
+ if (!m->is_mus_type ("rhythmic-event"))
{
String s = _ ("stem must have Rhythmic structure");
- if (info.req_l_)
- info.req_l_->origin ()->warning (s);
+ if (info.music_cause ())
+ info.music_cause ()->origin ()->warning (s);
else
::warning (s);
-
+
return;
}
- int durlog = unsmob_duration (rhythmic_req->get_mus_property ("duration"))-> duration_log ();
+ last_stem_added_at_ = now;
+ int durlog = unsmob_duration (m->get_property ("duration"))->duration_log ();
if (durlog <= 2)
{
- rhythmic_req->origin ()->warning (_ ("stem doesn't fit in beam"));
- prev_start_req_->origin ()->warning (_ ("beam was started here"));
+ m->origin ()->warning (_ ("stem doesn't fit in beam"));
+ prev_start_ev_->origin ()->warning (_ ("beam was started here"));
/*
don't return, since
*/
}
- stem_l->set_grob_property ("duration-log",
- gh_int2scm (durlog));
+ stem->set_property ("duration-log",
+ scm_int2num (durlog));
Moment stem_location = now - beam_start_mom_ + beam_start_location_;
- beam_info_p_->add_stem (stem_location,
- (durlog- 2) >? 1);
- Beam::add_stem (beam_p_, stem_l);
+ beam_info_->add_stem (stem_location,
+ max (durlog- 2, 0));
+ Beam::add_stem (beam_, stem);
}
}
}
+ADD_TRANSLATOR (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 ();
+}
-ADD_THIS_TRANSLATOR (Beam_engraver);
+ADD_TRANSLATOR (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 */ "");