-/*
- chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
-
+/*
+ new-chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
+
source file of the GNU LilyPond music typesetter
+
+ (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+
+ */
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
-*/
-
-#include "duration-convert.hh"
-#include "timing-translator.hh"
-#include "chord-tremolo-engraver.hh"
-#include "stem.hh"
+#include "engraver.hh"
#include "beam.hh"
+#include "repeated-music.hh"
+#include "stem.hh"
+#include "rhythmic-head.hh"
+#include "engraver-group-engraver.hh"
#include "musical-request.hh"
-#include "misc.hh"
#include "warn.hh"
-#include "score-engraver.hh"
+#include "misc.hh"
+#include "note-head.hh"
+#include "spanner.hh"
+#include "item.hh"
+#include "chord-tremolo-iterator.hh"
+#include "stem-tremolo.hh"
+#include "music-list.hh"
+
+/**
+ This acknowledges repeated music with "tremolo" style. It typesets
+ a beam.
+
+ TODO:
+
+ - perhaps use engraver this to steer other engravers? That would
+ create dependencies between engravers, which is bad.
+
+ - create dots if appropriate.
-ADD_THIS_TRANSLATOR (Chord_tremolo_engraver);
+ - create TremoloBeam iso Beam?
+ */
+
+class Chord_tremolo_engraver : public Engraver
+{
+ void typeset_beam ();
+TRANSLATOR_DECLARATIONS(Chord_tremolo_engraver);
+protected:
+ Repeated_music * repeat_;
+
+ /// moment (global time) where beam started.
+ Moment start_mom_;
+ Moment stop_mom_;
+
+ /// location within measure where beam started.
+ Moment beam_start_location_;
+
+ int note_head_i_;
+
+ bool sequential_body_b_;
+ Spanner * beam_p_;
+ Spanner * finished_beam_p_;
+ Item * stem_tremolo_;
+protected:
+ virtual void finalize ();
+ virtual bool try_music (Music*);
+ virtual void acknowledge_grob (Grob_info);
+ virtual void stop_translation_timestep ();
+ virtual void start_translation_timestep ();
+ virtual void process_music ();
+};
Chord_tremolo_engraver::Chord_tremolo_engraver ()
{
- reqs_drul_[LEFT] = reqs_drul_[RIGHT] = 0;
- abeam_p_ = 0;
- finished_abeam_p_ = 0;
- prev_start_req_ = 0;
+ beam_p_ = finished_beam_p_ = 0;
+ repeat_ =0;
+ note_head_i_ = 0;
+ stem_tremolo_ = 0;
+ sequential_body_b_ = false;
}
bool
-Chord_tremolo_engraver::do_try_music (Music* m)
+Chord_tremolo_engraver::try_music (Music * m)
{
- if (Chord_tremolo_req* b = dynamic_cast <Chord_tremolo_req *> (m))
+ Repeated_music * rp = dynamic_cast<Repeated_music*> (m);
+ if (rp
+ && rp->get_mus_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_cxx_function
+ && !repeat_)
{
- Direction d = b->span_dir_;
- if (reqs_drul_[d] && !reqs_drul_[d]->equal_b (b))
- return false;
-
- if ((d == STOP) && !abeam_p_)
- {
- m->warning (_ ("no tremolo beam to end"));
- return false;
- }
-
- reqs_drul_[d] = b;
+ Moment l = rp->length_mom ();
+ repeat_ = rp;
+ start_mom_ = now_mom ();
+ stop_mom_ = start_mom_ + l;
+ sequential_body_b_ = dynamic_cast<Sequential_music*> (rp->body ());
+
+ // ugh. should generate dots, triplet beams.
+ note_head_i_ = l.den () <? 4;
return true;
}
}
void
-Chord_tremolo_engraver::do_process_requests ()
+Chord_tremolo_engraver::process_music ()
{
- if (reqs_drul_[STOP])
- {
- if (!abeam_p_)
- reqs_drul_[STOP]->warning (_ ("no tremolo beam to end"));
- prev_start_req_ = 0;
- finished_abeam_p_ = abeam_p_;
- abeam_p_ = 0;
- }
-
- if (abeam_p_)
+ if (repeat_)
{
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
+ if (sequential_body_b_ && !beam_p_)
{
- e = dynamic_cast<Score_engraver*> (t);
- }
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks ();
- }
+ beam_p_ = new Spanner (get_property ("Beam"));
+ beam_p_->set_grob_property ("chord-tremolo", SCM_BOOL_T);
- if (reqs_drul_[START])
- {
- if (abeam_p_)
- {
- reqs_drul_[START]->warning (_ ("Already have a tremolo beam"));
- return;
- }
- prev_start_req_ = reqs_drul_[START];
-
- abeam_p_ = new Beam;
- abeam_p_->set_elt_property ("chord-tremolo", SCM_BOOL_T);
-
- announce_element (Score_element_info (abeam_p_, reqs_drul_[LEFT]));
- }
-}
+ SCM smp = get_property ("measurePosition");
+ Moment mp
+ = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
+ beam_start_location_ = mp;
+ announce_grob(beam_p_, repeat_->self_scm());
+ }
+ else if (!sequential_body_b_ && !stem_tremolo_)
+ {
+ int flags = intlog2 (note_head_i_ * repeat_->repeat_count ()) -2;
+ if (flags)
+ {
+ stem_tremolo_ = new Item (get_property ("StemTremolo"));
+ announce_grob(stem_tremolo_, repeat_->self_scm());
+ stem_tremolo_->set_grob_property ("flag-count",
+ gh_int2scm (flags));
-void
-Chord_tremolo_engraver::do_post_move_processing ()
-{
- reqs_drul_ [START] = 0;
+ }
+ }
+ }
}
-
void
-Chord_tremolo_engraver::do_pre_move_processing ()
+Chord_tremolo_engraver::finalize ()
{
typeset_beam ();
-}
-
-void
-Chord_tremolo_engraver::typeset_beam ()
-{
- if (finished_abeam_p_)
+ if (beam_p_)
{
- typeset_element (finished_abeam_p_);
- finished_abeam_p_ = 0;
-
- reqs_drul_[STOP] = 0;
+ repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
+ beam_p_->suicide ();
}
}
void
-Chord_tremolo_engraver::do_removal_processing ()
+Chord_tremolo_engraver::typeset_beam ()
{
- typeset_beam ();
- if (abeam_p_)
+ if (finished_beam_p_)
{
- prev_start_req_->warning (_ ("unfinished tremolo beam"));
- finished_abeam_p_ = abeam_p_;
- typeset_beam ();
+ typeset_grob (finished_beam_p_);
+ finished_beam_p_ = 0;
}
}
+
void
-Chord_tremolo_engraver::acknowledge_element (Score_element_info i)
+Chord_tremolo_engraver::acknowledge_grob (Grob_info info)
{
- if (abeam_p_)
+ if (beam_p_)
{
- if (Stem* s = dynamic_cast<Stem *> (i.elem_l_))
+ if (Stem::has_interface (info.grob_l_))
{
- int type_i = prev_start_req_->type_i_;
- s->set_elt_property ("duration-log", gh_int2scm (intlog2 (type_i) - 2));
-
- s->set_beaming (s->flag_i (), LEFT);
- s->set_beaming ( s->flag_i (), RIGHT);
+ Grob * s = info.grob_l_;
+ int f = Stem::flag_i (s);
+ f = (f > 2) ? f - 2 : 1;
+ Stem::set_beaming (s, f, LEFT);
+ Stem::set_beaming (s, f, RIGHT);
+ /*
+ URG: this sets the direction of the Stem s.
+ It's amazing Mike:
+
+ Stem:: type_i () ->first_head ()->get_direction () ->
+ Directional_element_interface::set (me, d);
+
+
+ don't understand this comment.
+ --hwn.
+ */
+ SCM d = s->get_grob_property ("direction");
+ if (Stem::type_i (s) != 1)
+ {
+ int gap_i =Stem::flag_i (s) - ((Stem::type_i (s) >? 2) - 2);
+ beam_p_->set_grob_property ("gap", gh_int2scm (gap_i));
+ }
+ s->set_grob_property ("direction", d);
-#if 0
- if (s->type_i () != 1)
+ if (dynamic_cast <Rhythmic_req *> (info.music_cause ()))
{
- int gap_i =s->flag_i () - ((s->type_i () >? 2) - 2);
- s->set_elt_property ("beam-gap", gh_int2scm(gap_i));
+ Beam::add_stem (beam_p_, s);
}
-#else
- if (s->type_i () != 1)
+ else
{
- int gap_i =s->flag_i () - ((s->type_i () >? 2) - 2);
- abeam_p_->set_elt_property ("beam-gap", gh_int2scm(gap_i));
+ String s = _ ("stem must have Rhythmic structure");
+ if (info.music_cause ())
+ info.music_cause ()->origin ()->warning (s);
+ else
+ ::warning (s);
}
-#endif
-
- abeam_p_->add_stem (s);
}
}
+ else if (stem_tremolo_ && Stem::has_interface (info.grob_l_))
+ {
+ Stem_tremolo::set_stem (stem_tremolo_, info.grob_l_);
+
+ info.grob_l_->set_grob_property ("duration-log", gh_int2scm (intlog2 (note_head_i_)));
+ }
+
+
+ if (repeat_ && Note_head::has_interface (info.grob_l_))
+ {
+ info.grob_l_->set_grob_property ("duration-log", gh_int2scm (intlog2 (note_head_i_)));
+ }
+}
+
+
+void
+Chord_tremolo_engraver::start_translation_timestep ()
+{
+ if (beam_p_ && stop_mom_ == now_mom ())
+ {
+ finished_beam_p_ = beam_p_;
+
+ repeat_ = 0;
+ beam_p_ = 0;
+ }
+}
+
+
+void
+Chord_tremolo_engraver::stop_translation_timestep ()
+{
+ typeset_beam ();
+
+ if (stem_tremolo_)
+ {
+ typeset_grob (stem_tremolo_);
+ stem_tremolo_ = 0;
+ }
+
}
+
+
+ENTER_DESCRIPTION(Chord_tremolo_engraver,
+/* descr */ "Generates beams for tremolo repeats.",
+/* creats*/ "Beam",
+/* acks */ "stem-interface note-head-interface",
+/* reads */ "",
+/* write */ "");
projects / lilypond.git / blobdiff