source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "stem-engraver.hh"
-#include "note-head.hh"
+#include "staff-symbol-referencer.hh"
+#include "rhythmic-head.hh"
#include "stem.hh"
-#include "musical-request.hh"
-#include "duration-convert.hh"
+#include "event.hh"
#include "misc.hh"
-#include "abbrev.hh"
+#include "stem-tremolo.hh"
+#include "item.hh"
+#include "translator-group.hh"
+#include "engraver.hh"
-Stem_engraver::Stem_engraver()
-{
- abbrev_req_l_ = 0;
- stem_p_ = 0;
- abbrev_p_ = 0;
- default_abbrev_i_ = 16;
- dir_ = CENTER;
-}
-void
-Stem_engraver::do_creation_processing ()
+
+/**
+ Make stems upon receiving noteheads.
+ */
+class Stem_engraver : public Engraver
{
- Scalar prop = get_property ("abbrev");
- if (prop.isnum_b ())
- {
- default_abbrev_i_ = prop;
- }
+ TRANSLATOR_DECLARATIONS(Stem_engraver);
+protected:
+ virtual void acknowledge_grob (Grob_info);
+ virtual void stop_translation_timestep ();
+ virtual bool try_music (Music*);
+
+private:
+ Grob *stem_;
+ Grob *tremolo_;
+ Music *rhythmic_ev_;
+ Music* tremolo_ev_;
+};
+
+Stem_engraver::Stem_engraver ()
+{
+ tremolo_ev_ = 0;
+ stem_ = 0;
+ tremolo_ = 0;
+ rhythmic_ev_ =0;
}
+
void
-Stem_engraver::acknowledge_element(Score_element_info i)
+Stem_engraver::acknowledge_grob (Grob_info i)
{
- if (dynamic_cast<Rhythmic_head *> (i.elem_l_))
+ Grob* h = i.grob_;
+ if (Rhythmic_head::has_interface (h))
{
- Rhythmic_head *h = dynamic_cast<Rhythmic_head *> (i.elem_l_);
- if (!stem_p_)
+ if (Rhythmic_head::get_stem (h))
+ return;
+
+ /* Reverted to the old method so chord tremolos work again. /MB
+ */
+ int duration_log = 0;
+
+ Music * m = i.music_cause ();
+ if (m->is_mus_type ("rhythmic-event"))
+ duration_log = unsmob_duration (m->get_mus_property ("duration"))-> duration_log ();
+
+ if (!stem_)
{
- Rhythmic_req * r = dynamic_cast <Rhythmic_req *> (i.req_l_);
- stem_p_ = new Stem;
- int durlog_i = r->duration_.durlog_i_;
- stem_p_->flag_i_ = durlog_i;
+ stem_ = make_item ("Stem");
-
- if (abbrev_req_l_)
+ stem_->set_grob_property ("duration-log", gh_int2scm (duration_log));
+
+ if (tremolo_ev_)
{
/*
- suggests typing of:
- c8:16 c: c: c:
- hmm, which isn't so bad?
- */
- int t = abbrev_req_l_->type_i_;
- if (!t)
- t = default_abbrev_i_;
+ Stem tremolo is never applied to a note by default,
+ is must me evuested. But there is a default for the
+ tremolo value:
+
+ c4:8 c c:
+
+ the first and last (quarter) note bothe get one tremolo flag.
+ */
+ int requested_type = gh_scm2int (tremolo_ev_->get_mus_property ("tremolo-type"));
+ SCM f = get_property ("tremoloFlags");
+ if (!requested_type)
+ if (gh_number_p (f))
+ requested_type = gh_scm2int (f);
+ else
+ requested_type = 8;
else
- default_abbrev_i_ = t;
+ daddy_trans_->set_property ("tremoloFlags", gh_int2scm (requested_type));
- if (t)
+ int tremolo_flags = intlog2 (requested_type) - 2
+ - (duration_log > 2 ? duration_log - 2 : 0);
+ if (tremolo_flags <= 0)
{
- abbrev_p_ = new Abbreviation;
- announce_element (Score_element_info (abbrev_p_, abbrev_req_l_));
- abbrev_p_->abbrev_flags_i_ =intlog2 (t) - (durlog_i>? 2);
+ tremolo_ev_->origin()->warning (_("tremolo duration is too long"));
+ tremolo_flags = 0;
+ }
+
+ if (tremolo_flags)
+ {
+ tremolo_ = make_item ("StemTremolo");
+ announce_grob(tremolo_, tremolo_ev_->self_scm());
+
+ /*
+ The number of tremolo flags is the number of flags of
+ the tremolo-type minus the number of flags of the note
+ itself.
+ */
+ tremolo_->set_grob_property ("flag-count",
+ gh_int2scm (tremolo_flags));
+ tremolo_->set_parent (stem_, X_AXIS);
+ stem_->set_grob_property ("tremolo-flag", tremolo_->self_scm ());
}
}
- // must give the request, to preserve the rhythmic info.
- announce_element (Score_element_info (stem_p_, r));
+ /*
+ We announce the cause of the head as cause of the stem.
+ The stem needs a rhythmic structure to fit it into a beam. */
+ announce_grob(stem_, i.music_cause ()->self_scm());
+ }
+
+ if (Stem::duration_log (stem_) != duration_log)
+ {
+ i.music_cause ()->origin ()->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << Stem::duration_log (stem_))
+ + _f ("Don't you want polyphonic voices instead?")
+ );
}
- stem_p_->add_head (h);
+
+ Stem::add_head (stem_,h);
}
}
void
-Stem_engraver::do_pre_move_processing()
+Stem_engraver::stop_translation_timestep ()
{
- if (abbrev_p_)
+ if (tremolo_)
{
- abbrev_p_->set_stem (stem_p_);
- typeset_element (abbrev_p_);
- abbrev_p_ = 0;
+ Stem_tremolo::set_stem (tremolo_, stem_);
+ typeset_grob (tremolo_);
+ tremolo_ = 0;
}
- if (stem_p_)
+
+ if (stem_)
{
- Scalar prop = get_property ("ydirection");
- dir_ = prop.isnum_b () ? (Direction)int(prop) : CENTER;
- if (dir_)
+ SCM prop = get_property ("stemLeftBeamCount");
+ if (gh_number_p (prop))
{
- stem_p_->dir_ = dir_;
- stem_p_->dir_forced_b_ = true;
+ Stem::set_beaming (stem_,gh_scm2int (prop),LEFT);
+ daddy_trans_->unset_property (ly_symbol2scm ("stemLeftBeamCount"));
+ }
+ prop = get_property ("stemRightBeamCount");
+ if (gh_number_p (prop))
+ {
+ Stem::set_beaming (stem_,gh_scm2int (prop), RIGHT);
+ daddy_trans_->unset_property (ly_symbol2scm ("stemRightBeamCount"));
}
- typeset_element(stem_p_);
- stem_p_ = 0;
+ typeset_grob (stem_);
+ stem_ = 0;
}
- abbrev_req_l_ = 0;
+
+
+ tremolo_ev_ = 0;
}
bool
-Stem_engraver::do_try_music (Music* r)
+Stem_engraver::try_music (Music* r)
{
- Musical_req* mus_l = dynamic_cast <Musical_req *> (r);
- if (!mus_l)
- return false;
-
- Abbreviation_req* a = dynamic_cast <Abbreviation_req *> (mus_l);
- if (!a)
- return false;
-
- abbrev_req_l_ = a;
-
- return true;
+ if (r->is_mus_type ("tremolo-event"))
+ {
+ tremolo_ev_ = r;
+ return true;
+ }
+ return false;
}
-
-ADD_THIS_TRANSLATOR(Stem_engraver);
+ENTER_DESCRIPTION(Stem_engraver,
+/* descr */ "Create stems and single-stem tremolos. It also works together with "
+"the beam engraver for overriding beaming.",
+/* creats*/ "Stem StemTremolo",
+/* accepts */ "tremolo-event",
+/* acks */ "rhythmic-head-interface",
+/* reads */ "tremoloFlags stemLeftBeamCount stemRightBeamCount",
+/* write */ "");
projects / lilypond.git / blobdiff