/*
- stem-engraver.cc -- implement Stem_engraver
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
+#include "engraver.hh"
+
#include "context.hh"
#include "directional-element-interface.hh"
-#include "engraver.hh"
+#include "duration.hh"
+#include "international.hh"
#include "item.hh"
#include "misc.hh"
#include "rhythmic-head.hh"
#include "staff-symbol-referencer.hh"
#include "stem-tremolo.hh"
#include "stem.hh"
-#include "duration.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
-/**
- Make stems upon receiving noteheads.
-*/
class Stem_engraver : public Engraver
{
Grob *stem_;
Grob *tremolo_;
- Music *rhythmic_ev_;
- Music *tremolo_ev_;
+ vector <Grob *> maybe_flags_;
+ Stream_event *rhythmic_ev_;
+ Stream_event *tremolo_ev_;
+ bool tuplet_start_;
TRANSLATOR_DECLARATIONS (Stem_engraver);
protected:
- void make_stem (Grob_info);
+ void make_stem (Grob_info, bool);
+ DECLARE_TRANSLATOR_LISTENER (tremolo);
+ DECLARE_TRANSLATOR_LISTENER (tuplet_span);
DECLARE_ACKNOWLEDGER (rhythmic_head);
void stop_translation_timestep ();
- virtual bool try_music (Music *);
+ void finalize ();
+ void kill_unused_flags ();
};
Stem_engraver::Stem_engraver ()
stem_ = 0;
tremolo_ = 0;
rhythmic_ev_ = 0;
+ tuplet_start_ = false;
}
void
-Stem_engraver::make_stem (Grob_info gi)
+Stem_engraver::make_stem (Grob_info gi, bool tuplet_start)
{
/* 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.music_cause ()->self_scm ());
-
- /*
- we take the duration log from the Event, since the duration-log
- for a note head is always <= 2.
- */
- Music *music = gi.music_cause ();
- Duration *dur = unsmob_duration (music->get_property ("duration"));
-
- stem_->set_property ("duration-log", dur ? scm_from_int (dur->duration_log ()) : 0);
-
+ stem_ = make_item ("Stem", gi.grob ()->self_scm ());
+ if (tuplet_start)
+ stem_->set_property ("tuplet-start", SCM_BOOL_T);
+ (void) make_item ("StemStub", gi.grob ()->self_scm ());
if (tremolo_ev_)
{
/* Stem tremolo is never applied to a note by default,
- is must me requested. But there is a default for the
- tremolo value:
+ it must be requested. But there is a default for the
+ tremolo value:
- c4:8 c c:
+ c4:8 c c:
- the first and last (quarter) note bothe get one tremolo flag. */
+ the first and last (quarter) note both get one tremolo flag. */
int requested_type
- = scm_to_int (tremolo_ev_->get_property ("tremolo-type"));
+ = robust_scm2int (tremolo_ev_->get_property ("tremolo-type"), 0);
SCM f = get_property ("tremoloFlags");
if (!requested_type)
- {
- if (scm_is_number (f))
- requested_type = scm_to_int (f);
- else
- requested_type = 8;
- }
+ {
+ 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));
+ context ()->set_property ("tremoloFlags", scm_from_int (requested_type));
+
+ /*
+ 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);
+ - (dur->duration_log () > 2 ? dur->duration_log () - 2 : 0);
if (tremolo_flags <= 0)
- {
- tremolo_ev_->origin ()->warning (_ ("tremolo duration is too long"));
- tremolo_flags = 0;
- }
+ {
+ tremolo_ev_->origin ()->warning (_ ("tremolo duration is too long"));
+ tremolo_flags = 0;
+ }
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 ());
- }
+ {
+ 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 ());
+ }
}
}
if (Rhythmic_head::get_stem (gi.grob ()))
return;
- Music *cause = gi.music_cause ();
+ Stream_event *cause = gi.event_cause ();
if (!cause)
return;
Duration *d = unsmob_duration (cause->get_property ("duration"));
if (!d)
- return ;
-
+ return;
+
if (!stem_)
- make_stem (gi);
-
- if (Stem::duration_log (stem_) != d->duration_log ())
+ make_stem (gi, tuplet_start_);
+
+ int ds = Stem::duration_log (stem_);
+ int dc = d->duration_log ();
+
+ // half notes and quarter notes all have compatible stems.
+ // Longas are done differently (oops?), so we can't unify
+ // them with the other stemmed notes.
+ if (ds == 1)
+ ds = 2;
+ if (dc == 1)
+ dc = 2;
+ // whole notes and brevis both have no stems
+ if (ds == -1)
+ ds = 0;
+ if (dc == -1)
+ dc = 0;
+
+ if (ds != dc)
{
- // FIXME:
- gi.music_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d)",
- 1 << Stem::duration_log (stem_)));
- gi.music_cause ()->origin ()->warning (_f ("maybe input should specify polyphonic voices"));
+ gi.event_cause ()->origin ()->warning (_f ("adding note head to incompatible stem (type = %d/%d)",
+ ds < 0 ? 1 << -ds : 1,
+ ds > 0 ? 1 << ds : 1));
+ gi.event_cause ()->origin ()->warning (_ ("maybe input should specify polyphonic voices"));
}
Stem::add_head (stem_, gi.grob ());
+
+ if (Stem::is_normal_stem (stem_)
+ && Stem::duration_log (stem_) > 2)
+ {
+ Item *flag = make_item ("Flag", stem_->self_scm ());
+ flag->set_parent (stem_, X_AXIS);
+ stem_->set_object ("flag", flag->self_scm ());
+ maybe_flags_.push_back (flag);
+ }
+ if (tuplet_start_)
+ stem_->set_property ("tuplet-start", SCM_BOOL_T);
+}
+
+void
+Stem_engraver::kill_unused_flags ()
+{
+ for (vsize i = 0; i < maybe_flags_.size (); i++)
+ if (unsmob_grob (maybe_flags_[i]->get_parent (X_AXIS)->get_object ("beam")))
+ maybe_flags_[i]->suicide ();
+}
+
+void
+Stem_engraver::finalize ()
+{
+ kill_unused_flags ();
}
void
Stem_engraver::stop_translation_timestep ()
{
+ if (scm_is_string (get_property ("whichBar")))
+ kill_unused_flags ();
+
tremolo_ = 0;
if (stem_)
{
/* FIXME: junk these properties. */
SCM prop = get_property ("stemLeftBeamCount");
if (scm_is_number (prop))
- {
- Stem::set_beaming (stem_, scm_to_int (prop), LEFT);
- context ()->unset_property (ly_symbol2scm ("stemLeftBeamCount"));
- }
+ {
+ Stem::set_beaming (stem_, scm_to_int (prop), LEFT);
+ context ()->unset_property (ly_symbol2scm ("stemLeftBeamCount"));
+ }
prop = get_property ("stemRightBeamCount");
if (scm_is_number (prop))
- {
- Stem::set_beaming (stem_, scm_to_int (prop), RIGHT);
- context ()->unset_property (ly_symbol2scm ("stemRightBeamCount"));
- }
+ {
+ Stem::set_beaming (stem_, scm_to_int (prop), RIGHT);
+ context ()->unset_property (ly_symbol2scm ("stemRightBeamCount"));
+ }
stem_ = 0;
}
+ tuplet_start_ = false;
tremolo_ev_ = 0;
}
-bool
-Stem_engraver::try_music (Music *m)
+IMPLEMENT_TRANSLATOR_LISTENER (Stem_engraver, tuplet_span);
+void
+Stem_engraver::listen_tuplet_span (Stream_event *ev)
{
- if (m->is_mus_type ("tremolo-event"))
+ Direction dir = to_dir (ev->get_property ("span-direction"));
+ if (dir == START)
{
- tremolo_ev_ = m;
- return true;
+ // set stem property if stem already exists
+ if (stem_)
+ stem_->set_property ("tuplet-start", SCM_BOOL_T);
+ tuplet_start_ = true; // stash the value for use in later creation
}
- return false;
}
-#include "translator.icc"
-ADD_ACKNOWLEDGER (Stem_engraver,rhythmic_head);
+IMPLEMENT_TRANSLATOR_LISTENER (Stem_engraver, tremolo);
+void
+Stem_engraver::listen_tremolo (Stream_event *ev)
+{
+ ASSIGN_EVENT_ONCE (tremolo_ev_, ev);
+}
+
+ADD_ACKNOWLEDGER (Stem_engraver, rhythmic_head);
+
ADD_TRANSLATOR (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",
- /* reads */ "tremoloFlags stemLeftBeamCount stemRightBeamCount",
- /* write */ "");
+ /* doc */
+ "Create stems and single-stem tremolos. It also works"
+ " together with the beam engraver for overriding beaming.",
+
+ /* create */
+ "Stem "
+ "StemTremolo ",
+
+ /* read */
+ "tremoloFlags "
+ "stemLeftBeamCount "
+ "stemRightBeamCount "
+ "whichBar ",
+
+ /* write */
+ ""
+ );
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