-/*
- new-chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
-
- source file of the GNU LilyPond music typesetter
-
- (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-
-#include "engraver.hh"
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2000--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Erik Sandberg <mandolaerik@gmail.com>
+
+ 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 "beam.hh"
+#include "engraver-group.hh"
+#include "international.hh"
+#include "item.hh"
+#include "math.h" // ceil
+#include "misc.hh"
#include "repeated-music.hh"
-#include "stem.hh"
#include "rhythmic-head.hh"
-#include "engraver-group-engraver.hh"
-#include "event.hh"
-#include "warn.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"
-#include "math.h" // ceil
+#include "stem.hh"
+#include "stream-event.hh"
+#include "warn.hh"
-/**
+#include "translator.icc"
- This acknowledges repeated music with "tremolo" style. It typesets
- a beam.
+/**
- TODO:
+This acknowledges repeated music with "tremolo" style. It typesets
+a beam.
- - perhaps use engraver this to steer other engravers? That would
- create dependencies between engravers, which is bad.
+TODO:
- - create dots if appropriate.
+- perhaps use engraver this to steer other engravers? That would
+create dependencies between engravers, which is bad.
- - create TremoloBeam iso Beam?
+- create dots if appropriate.
+- create TremoloBeam iso Beam?
*/
class Chord_tremolo_engraver : public Engraver
{
- void typeset_beam ();
- TRANSLATOR_DECLARATIONS(Chord_tremolo_engraver);
+ TRANSLATOR_DECLARATIONS (Chord_tremolo_engraver);
protected:
- Repeated_music * repeat_;
-
- /// moment (global time) where beam started.
- Moment start_mom_;
- Moment stop_mom_;
- int flags_ ;
- int total_duration_flags_;
-
- /// location within measure where beam started.
- Moment beam_start_location_;
-
- bool sequential_body_b_;
- Spanner * beam_;
- Spanner * finished_beam_;
- Item * stem_tremolo_;
+ Stream_event *repeat_;
+
+ Spanner *beam_;
+ // Store the pointer to the previous stem, so we can create a beam if
+ // necessary and end the spanner
+ Grob *previous_stem_;
+
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 ();
+ void process_music ();
+ DECLARE_TRANSLATOR_LISTENER (tremolo_span);
+ DECLARE_ACKNOWLEDGER (stem);
};
Chord_tremolo_engraver::Chord_tremolo_engraver ()
{
- beam_ = finished_beam_ = 0;
- repeat_ =0;
- flags_ = 0;
- stem_tremolo_ = 0;
- sequential_body_b_ = false;
+ beam_ = 0;
+ repeat_ = 0;
+ previous_stem_ = 0;
}
-bool
-Chord_tremolo_engraver::try_music (Music * m)
+IMPLEMENT_TRANSLATOR_LISTENER (Chord_tremolo_engraver, tremolo_span);
+void
+Chord_tremolo_engraver::listen_tremolo_span (Stream_event *ev)
{
- Repeated_music * rp = dynamic_cast<Repeated_music*> (m);
- if (rp
- && rp->get_mus_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_proc
- && !repeat_)
+ Direction span_dir = to_dir (ev->get_property ("span-direction"));
+ if (span_dir == START)
{
- Moment l = rp->get_length ();
- repeat_ = rp;
- start_mom_ = now_mom ();
- stop_mom_ = start_mom_ + l;
-
- Sequential_music * seq = dynamic_cast<Sequential_music*> (rp->body ());
- sequential_body_b_ = seq;
-
- int elt_count = seq ? scm_ilength (seq-> music_list ()) : 1;
-
- if (seq && elt_count != 2)
- {
- rp->origin ()->warning (_f ("Chord tremolo with %d elements. Must have two elements.", elt_count));
- }
-
- if (elt_count <= 0)
- elt_count = 1;
-
- Rational total_dur = l.main_part_;
- Rational note_dur = total_dur / Rational (elt_count * repeat_->repeat_count ());
-
- total_duration_flags_ = 0 >? (intlog2 (total_dur.den ()) - 2);
-
- flags_ = intlog2 (note_dur.den ()) -2 ;
-
- return true;
+ ASSIGN_EVENT_ONCE (repeat_, ev);
+ }
+ else if (span_dir == STOP)
+ {
+ if (!repeat_)
+ ev->origin ()->warning (_ ("No tremolo to end"));
+ repeat_ = 0;
+ beam_ = 0;
+ previous_stem_ = 0;
}
-
- return false;
}
void
Chord_tremolo_engraver::process_music ()
{
- if (repeat_)
+ if (repeat_ && !beam_)
{
- if (sequential_body_b_ && !beam_)
- {
- beam_ = make_spanner ("Beam");
- beam_->set_grob_property ("chord-tremolo", SCM_BOOL_T);
-
- SCM smp = get_property ("measurePosition");
- Moment mp
- = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
- beam_start_location_ = mp;
- announce_grob(beam_, repeat_->self_scm());
- }
- else if (!sequential_body_b_ && !stem_tremolo_)
- {
- if (flags_)
- {
- stem_tremolo_ = make_item ("StemTremolo");
- announce_grob(stem_tremolo_, repeat_->self_scm());
- stem_tremolo_->set_grob_property ("flag-count",
- scm_int2num (flags_));
- }
- }
+ beam_ = make_spanner ("Beam", repeat_->self_scm ());
}
}
+
void
Chord_tremolo_engraver::finalize ()
{
- typeset_beam ();
if (beam_)
{
repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
+ announce_end_grob (beam_, SCM_EOL);
beam_->suicide ();
}
}
void
-Chord_tremolo_engraver::typeset_beam ()
-{
- if (finished_beam_)
- {
- typeset_grob (finished_beam_);
- finished_beam_ = 0;
- }
-}
-
-void
-Chord_tremolo_engraver::acknowledge_grob (Grob_info info)
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- if (beam_ && Stem::has_interface (info.grob_))
+ if (beam_)
{
- Grob * s = info.grob_;
+ int tremolo_type = robust_scm2int (repeat_->get_property ("tremolo-type"), 1);
+ int flags = max (0, intlog2 (tremolo_type) - 2);
+ int repeat_count = robust_scm2int (repeat_->get_property ("repeat-count"), 1);
+ int gap_count = min (flags, intlog2 (repeat_count) + 1);
+
+ Grob *s = info.grob ();
+ if (previous_stem_)
+ {
+ // FIXME: We know that the beam has ended only in listen_tremolo_span
+ // but then it is too late for Spanner_break_forbid_engraver
+ // to allow a line break... So, as a nasty hack, announce the
+ // spanner's end after each note except the first. The only
+ // "drawback" is that for multi-note tremolos a break would
+ // theoretically be allowed after the second note (but since
+ // that note is typically not at a barline, I don't think
+ // anyone will ever notice!)
+ announce_end_grob (beam_, previous_stem_->self_scm ());
+ // Create the whole beam between previous and current note
+ Stem::set_beaming (previous_stem_, flags, RIGHT);
+ Stem::set_beaming (s, flags, LEFT);
+ }
- if (start_mom_ == now_mom())
- Stem::set_beaming (s, flags_, RIGHT);
- else
- Stem::set_beaming (s, flags_, LEFT);
-
if (Stem::duration_log (s) != 1)
- {
- beam_->set_grob_property ("gap-count", gh_int2scm (flags_ - total_duration_flags_));
- }
-
- if (info.music_cause ()->is_mus_type ("rhythmic-event"))
- {
- Beam::add_stem (beam_, s);
- }
- else
- {
- String s = _ ("stem must have Rhythmic structure");
- if (info.music_cause ())
- info.music_cause ()->origin ()->warning (s);
- else
- ::warning (s);
- }
- }
- else if (stem_tremolo_ && Stem::has_interface (info.grob_))
- {
- Stem_tremolo::set_stem (stem_tremolo_, info.grob_);
- stem_tremolo_->set_parent (info.grob_,X_AXIS);
- }
-}
-
+ beam_->set_property ("gap-count", scm_from_int (gap_count));
-void
-Chord_tremolo_engraver::start_translation_timestep ()
-{
- if (beam_ && stop_mom_ == now_mom ())
- {
- finished_beam_ = beam_;
- repeat_ = 0;
- beam_ = 0;
+ if (info.ultimate_event_cause ()->in_event_class ("rhythmic-event"))
+ Beam::add_stem (beam_, s);
+ else
+ {
+ string s = _ ("stem must have Rhythmic structure");
+ if (info.event_cause ())
+ info.event_cause ()->origin ()->warning (s);
+ else
+ ::warning (s);
+ }
+ // Store current grob, so we can possibly end the spanner here (and
+ // reset the beam direction to RIGHT)
+ previous_stem_ = s;
}
}
+ADD_ACKNOWLEDGER (Chord_tremolo_engraver, stem);
+ADD_TRANSLATOR (Chord_tremolo_engraver,
+ /* doc */
+ "Generate beams for tremolo repeats.",
-void
-Chord_tremolo_engraver::stop_translation_timestep ()
-{
- typeset_beam ();
-
- if (stem_tremolo_)
- {
- typeset_grob (stem_tremolo_);
- stem_tremolo_ = 0;
- }
-}
-
+ /* create */
+ "Beam ",
+ /* read */
+ "",
-ENTER_DESCRIPTION(Chord_tremolo_engraver,
-/* descr */ "Generates beams for tremolo repeats.",
-/* creats*/ "Beam",
-/* accepts */ "repeated-music",
-/* acks */ "stem-interface note-head-interface",
-/* reads */ "",
-/* write */ "");
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff