/*
- stem-grav.cc -- implement Stem_engraver
+ stem-engraver.cc -- implement Stem_engraver
source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "staff-symbol-referencer.hh"
-#include "rhythmic-head.hh"
-#include "stem.hh"
-#include "musical-request.hh"
+#include "engraver.hh"
+
+#include "context.hh"
+#include "directional-element-interface.hh"
+#include "duration.hh"
+#include "international.hh"
+#include "item.hh"
#include "misc.hh"
+#include "rhythmic-head.hh"
+#include "script-interface.hh"
+#include "staff-symbol-referencer.hh"
#include "stem-tremolo.hh"
-#include "item.hh"
-#include "translator-group.hh"
-#include "engraver.hh"
+#include "stem.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
-/**
- Make stems upon receiving noteheads.
- */
class Stem_engraver : public Engraver
{
+ Grob *stem_;
+ Grob *tremolo_;
+ Stream_event *rhythmic_ev_;
+ Stream_event *tremolo_ev_;
+
+ TRANSLATOR_DECLARATIONS (Stem_engraver);
-public:
- VIRTUAL_COPY_CONS (Translator);
- Stem_engraver();
-
protected:
- virtual void acknowledge_element (Score_element_info);
- virtual void do_pre_move_processing ();
- virtual bool do_try_music (Music*);
-
-private:
- Score_element *stem_p_;
- Score_element *tremolo_p_;
- Rhythmic_req *rhythmic_req_l_;
- Tremolo_req* tremolo_req_l_;
-};
+ void make_stem (Grob_info);
-ADD_THIS_TRANSLATOR (Stem_engraver);
+ DECLARE_TRANSLATOR_LISTENER (tremolo);
+ DECLARE_ACKNOWLEDGER (rhythmic_head);
+ void stop_translation_timestep ();
+};
Stem_engraver::Stem_engraver ()
{
- tremolo_req_l_ = 0;
- stem_p_ = 0;
- tremolo_p_ = 0;
- rhythmic_req_l_ =0;
+ tremolo_ev_ = 0;
+ stem_ = 0;
+ tremolo_ = 0;
+ rhythmic_ev_ = 0;
}
-
void
-Stem_engraver::acknowledge_element(Score_element_info i)
+Stem_engraver::make_stem (Grob_info gi)
{
- Score_element* h = i.elem_l_;
- if (Rhythmic_head::has_interface (h))
+ /* Announce the cause of the head as cause of the stem. The
+ stem needs a rhythmic structure to fit it into a beam. */
+ stem_ = make_item ("Stem", gi.grob ()->self_scm ());
+
+ if (tremolo_ev_)
{
- if (Rhythmic_head::stem_l (h))
- return;
-
- Rhythmic_req * r = dynamic_cast <Rhythmic_req *> (i.req_l_);
- int duration_log = r->duration_.durlog_i_;
- if (!stem_p_)
+ /* Stem tremolo is never applied to a note by default,
+ is must me requested. 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
+ = scm_to_int (tremolo_ev_->get_property ("tremolo-type"));
+ SCM f = get_property ("tremoloFlags");
+ if (!requested_type)
{
- stem_p_ = new Item (get_property ("Stem"));
- Stem::set_interface (stem_p_);
- Staff_symbol_referencer::set_interface(stem_p_);
-
-
- stem_p_->set_elt_property ("duration-log", gh_int2scm (duration_log));
-
- if (tremolo_req_l_)
- {
- /*
- Stem tremolo is never applied to a note by default,
- is must me requested. 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 = tremolo_req_l_->type_i_;
- SCM f = get_property ("tremoloFlags");
- if (!requested_type && gh_number_p (f))
- requested_type = gh_scm2int (f);
- else
- daddy_trans_l_->set_property ("tremoloFlags", gh_int2scm (requested_type));
-
- if (requested_type)
- {
- tremolo_p_ = new Item (get_property ("StemTremolo"));
- Stem_tremolo::set_interface (tremolo_p_);
-
- announce_element (tremolo_p_, tremolo_req_l_);
- /*
- The number of tremolo flags is the number of flags of
- the tremolo-type minus the number of flags of the note
- itself.
- */
- int tremolo_flags = intlog2 (requested_type) - 2
- - (duration_log > 2 ? duration_log - 2 : 0);
- if (tremolo_flags < 0)
- tremolo_flags = 0;
- tremolo_p_->set_elt_property ("tremolo-flags",
- gh_int2scm (tremolo_flags));
- }
- }
- announce_element (stem_p_, r);
+ if (scm_is_number (f))
+ requested_type = scm_to_int (f);
+ else
+ requested_type = 8;
}
+ else
+ context ()->set_property ("tremoloFlags", scm_from_int (requested_type));
+
- if (Stem::flag_i (stem_p_) != duration_log)
+ /*
+ we take the duration log from the Event, since the duration-log
+ for a note head is always <= 2.
+ */
+ Stream_event *ev = gi.event_cause ();
+ Duration *dur = unsmob_duration (ev->get_property ("duration"));
+
+ int tremolo_flags = intlog2 (requested_type) - 2
+ - (dur->duration_log () > 2 ? dur->duration_log () - 2 : 0);
+ if (tremolo_flags <= 0)
{
- r->origin ()->warning (_f ("Adding note head to incompatible stem (type = %d)", 1 << Stem::flag_i (stem_p_)));
+ tremolo_ev_->origin ()->warning (_ ("tremolo duration is too long"));
+ tremolo_flags = 0;
}
- Stem::add_head (stem_p_,h);
+ if (tremolo_flags)
+ {
+ tremolo_ = make_item ("StemTremolo", 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_property ("flag-count", scm_from_int (tremolo_flags));
+ tremolo_->set_parent (stem_, X_AXIS);
+ stem_->set_object ("tremolo-flag", tremolo_->self_scm ());
+ tremolo_->set_object ("stem", stem_->self_scm ());
+ }
}
}
void
-Stem_engraver::do_pre_move_processing()
+Stem_engraver::acknowledge_rhythmic_head (Grob_info gi)
{
- if (tremolo_p_)
+ if (Rhythmic_head::get_stem (gi.grob ()))
+ return;
+
+ Stream_event *cause = gi.event_cause ();
+ if (!cause)
+ return;
+ Duration *d = unsmob_duration (cause->get_property ("duration"));
+ if (!d)
+ return;
+
+ if (!stem_)
+ make_stem (gi);
+
+ if (Stem::duration_log (stem_) != d->duration_log ())
{
- Stem_tremolo::set_stem (tremolo_p_, stem_p_);
- typeset_element (tremolo_p_);
- tremolo_p_ = 0;
+ // FIXME:
+ gi.event_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d)",
+ 1 << Stem::duration_log (stem_)));
+ gi.event_cause ()->origin ()->warning (_f ("maybe input should specify polyphonic voices"));
}
- if (stem_p_)
+ Stem::add_head (stem_, gi.grob ());
+}
+
+void
+Stem_engraver::stop_translation_timestep ()
+{
+ tremolo_ = 0;
+ if (stem_)
{
+ /* FIXME: junk these properties. */
SCM prop = get_property ("stemLeftBeamCount");
- if (gh_number_p(prop))
+ if (scm_is_number (prop))
{
- Stem::set_beaming (stem_p_,gh_scm2int (prop),LEFT);
- daddy_trans_l_->set_property ("stemLeftBeamCount", SCM_UNDEFINED);
+ Stem::set_beaming (stem_, scm_to_int (prop), LEFT);
+ context ()->unset_property (ly_symbol2scm ("stemLeftBeamCount"));
}
prop = get_property ("stemRightBeamCount");
- if (gh_number_p(prop))
+ if (scm_is_number (prop))
{
- Stem::set_beaming (stem_p_,gh_scm2int (prop), RIGHT);
- daddy_trans_l_->set_property ("stemRightBeamCount", SCM_UNDEFINED);
+ Stem::set_beaming (stem_, scm_to_int (prop), RIGHT);
+ context ()->unset_property (ly_symbol2scm ("stemRightBeamCount"));
}
+ stem_ = 0;
+ }
+ tremolo_ev_ = 0;
+}
-
- // UGH. Should mark non-forced instead.
+IMPLEMENT_TRANSLATOR_LISTENER (Stem_engraver, tremolo);
+void
+Stem_engraver::listen_tremolo (Stream_event *ev)
+{
+ ASSIGN_EVENT_ONCE (tremolo_ev_, ev);
+}
- /*
- aargh: I don't get it. direction is being set (and then set
- to forced), if we have a Chord_tremolo.
- */
- SCM dir = stem_p_->get_elt_property ("direction");
- if (gh_number_p (dir) && to_dir(dir))
- {
- stem_p_->set_elt_property ("dir-forced", SCM_BOOL_T);
- }
+ADD_ACKNOWLEDGER (Stem_engraver, rhythmic_head);
- typeset_element(stem_p_);
- stem_p_ = 0;
- }
+ADD_TRANSLATOR (Stem_engraver,
+ /* doc */ "Create stems and single-stem tremolos. It also works together with "
+ "the beam engraver for overriding beaming.",
- tremolo_req_l_ = 0;
-}
+ /* create */
+ "Stem "
+ "StemTremolo ",
-bool
-Stem_engraver::do_try_music (Music* r)
-{
- if (Tremolo_req* a = dynamic_cast <Tremolo_req *> (r))
- {
- tremolo_req_l_ = a;
- return true;
- }
- return false;
-}
+ /* read */
+ "tremoloFlags "
+ "stemLeftBeamCount "
+ "stemRightBeamCount ",
+ /* write */ "");
projects / lilypond.git / blobdiff