-/*
- 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>
-
- */
-
-#include "engraver.hh"
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2000--2015 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 "musical-request.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_;
+ Stream_event *repeat_;
- /// location within measure where beam started.
- Moment beam_start_location_;
+ Spanner *beam_;
+ // Store the pointer to the previous stem, so we can create a beam if
+ // necessary and end the spanner
+ Grob *previous_stem_;
- int note_head_i_;
- int dots_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 ();
+ void process_music ();
+ void listen_tremolo_span (Stream_event *);
+ void acknowledge_stem (Grob_info);
};
-Chord_tremolo_engraver::Chord_tremolo_engraver ()
-{
- beam_p_ = finished_beam_p_ = 0;
- repeat_ =0;
- note_head_i_ = 0;
- dots_i_ = 0;
- stem_tremolo_ = 0;
- sequential_body_b_ = false;
-}
-
-bool
-Chord_tremolo_engraver::try_music (Music * m)
+Chord_tremolo_engraver::Chord_tremolo_engraver (Context *c)
+ : Engraver (c)
{
- Repeated_music * rp = dynamic_cast<Repeated_music*> (m);
- if (rp
- && rp->get_mus_property ("iterator-ctor") == Chord_tremolo_iterator::constructor_cxx_function
- && !repeat_)
- {
- 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 triplet beams.
- note_head_i_ = int (ceil (double(l.den ()) / l.num ()));
- dots_i_ = intlog2 (1+l.num ()) -1 ; // 1->0, 3->1, 7->2
- note_head_i_ = note_head_i_ <? 4;
- return true;
- }
-
- return false;
+ beam_ = 0;
+ repeat_ = 0;
+ previous_stem_ = 0;
}
void
-Chord_tremolo_engraver::process_music ()
+Chord_tremolo_engraver::listen_tremolo_span (Stream_event *ev)
{
- if (repeat_)
+ Direction span_dir = to_dir (ev->get_property ("span-direction"));
+ if (span_dir == START)
{
- if (sequential_body_b_ && !beam_p_)
- {
- beam_p_ = new Spanner (get_property ("Beam"));
- beam_p_->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_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));
-
- }
- }
+ ASSIGN_EVENT_ONCE (repeat_, ev);
}
-}
-void
-Chord_tremolo_engraver::finalize ()
-{
- typeset_beam ();
- if (beam_p_)
+ else if (span_dir == STOP)
{
- repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
- beam_p_->suicide ();
+ if (!repeat_)
+ ev->origin ()->warning (_ ("No tremolo to end"));
+ repeat_ = 0;
+ beam_ = 0;
+ previous_stem_ = 0;
}
}
void
-Chord_tremolo_engraver::typeset_beam ()
+Chord_tremolo_engraver::process_music ()
{
- if (finished_beam_p_)
+ if (repeat_ && !beam_)
{
- typeset_grob (finished_beam_p_);
- finished_beam_p_ = 0;
+ beam_ = make_spanner ("Beam", repeat_->self_scm ());
}
}
-
void
-Chord_tremolo_engraver::acknowledge_grob (Grob_info info)
+Chord_tremolo_engraver::finalize ()
{
- if (beam_p_)
- {
- if (Stem::has_interface (info.grob_l_))
- {
- Grob * s = info.grob_l_;
- int f = Stem::duration_log (s);
- f = (f > 2) ? f - 2 : 1;
- Stem::set_beaming (s, f, LEFT);
- Stem::set_beaming (s, f, RIGHT);
-
- SCM d = s->get_grob_property ("direction");
- if (Stem::duration_log (s) != 1)
- {
- int gap_i =Stem::duration_log (s) - ((Stem::duration_log (s) >? 2) - 2);
- beam_p_->set_grob_property ("gap", gh_int2scm (gap_i));
- }
- s->set_grob_property ("direction", d);
-
- if (dynamic_cast <Rhythmic_req *> (info.music_cause ()))
- {
- Beam::add_stem (beam_p_, 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_l_))
+ if (beam_)
{
- 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_)));
- if (dots_i_ > 0)
- {
- Item * d = new Item (get_property ("Dots"));
- Rhythmic_head::set_dots (info.grob_l_, d);
-
- d->set_grob_property ("dot-count", gh_int2scm (dots_i_));
-
- d->set_parent (info.grob_l_, Y_AXIS);
- announce_grob (d, SCM_EOL);
- }
+ repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
+ announce_end_grob (beam_, SCM_EOL);
+ beam_->suicide ();
}
}
-
void
-Chord_tremolo_engraver::start_translation_timestep ()
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- if (beam_p_ && stop_mom_ == now_mom ())
+ if (beam_)
{
- finished_beam_p_ = beam_p_;
-
- repeat_ = 0;
- beam_p_ = 0;
+ 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 (Stem::duration_log (s) != 1)
+ beam_->set_property ("gap-count", scm_from_int (gap_count));
+
+ 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;
}
}
-
void
-Chord_tremolo_engraver::stop_translation_timestep ()
+Chord_tremolo_engraver::boot ()
{
- typeset_beam ();
-
- if (stem_tremolo_)
- {
- typeset_grob (stem_tremolo_);
- stem_tremolo_ = 0;
- }
-
+ ADD_LISTENER (Chord_tremolo_engraver, tremolo_span);
+ ADD_ACKNOWLEDGER (Chord_tremolo_engraver, stem);
}
+ADD_TRANSLATOR (Chord_tremolo_engraver,
+ /* doc */
+ "Generate beams for tremolo repeats.",
+
+ /* create */
+ "Beam ",
+ /* read */
+ "",
-ENTER_DESCRIPTION(Chord_tremolo_engraver,
-/* descr */ "Generates beams for tremolo repeats.",
-/* creats*/ "Beam",
-/* acks */ "stem-interface note-head-interface",
-/* reads */ "",
-/* write */ "");
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff