-/*
- new-chord-tremolo-engraver.cc -- implement Chord_tremolo_engraver
-
- source file of the GNU LilyPond music typesetter
-
- (c) 2000 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 "spanner.hh"
+#include "stem-tremolo.hh"
+#include "stem.hh"
+#include "stream-event.hh"
#include "warn.hh"
-#include "misc.hh"
-#include "note-head.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 dots if appropriate.
+- create TremoloBeam iso Beam?
+*/
class Chord_tremolo_engraver : public Engraver
{
- void typeset_beam ();
-public:
- VIRTUAL_COPY_CONS(Translator);
- Chord_tremolo_engraver();
+ TRANSLATOR_DECLARATIONS (Chord_tremolo_engraver);
protected:
- Repeated_music * repeat_;
+ Stream_event *repeat_;
- /// moment (global time) where beam started.
- Moment start_mom_;
- Moment stop_mom_;
+ Spanner *beam_;
+ // Store the pointer to the previous stem, so we can create a beam if
+ // necessary and end the spanner
+ Grob *previous_stem_;
- /// location within measure where beam started.
- Moment beam_start_location_;
-
- int note_head_i_;
-
- Beam * beam_p_;
- Beam * finished_beam_p_;
-
protected:
- virtual void do_removal_processing();
- virtual void do_process_music();
- virtual bool do_try_music (Music*);
- virtual void acknowledge_element (Score_element_info);
- virtual void do_pre_move_processing();
- virtual void do_post_move_processing();
+ virtual void finalize ();
+ void process_music ();
+ void listen_tremolo_span (Stream_event *);
+ void acknowledge_stem (Grob_info);
};
-Chord_tremolo_engraver::Chord_tremolo_engraver()
+Chord_tremolo_engraver::Chord_tremolo_engraver (Context *c)
+ : Engraver (c)
{
- beam_p_ = finished_beam_p_ = 0;
- repeat_ =0;
- note_head_i_ = 0;
+ beam_ = 0;
+ repeat_ = 0;
+ previous_stem_ = 0;
}
-bool
-Chord_tremolo_engraver::do_try_music (Music * m)
+void
+Chord_tremolo_engraver::listen_tremolo_span (Stream_event *ev)
{
- Repeated_music * rp = dynamic_cast<Repeated_music*> (m);
- if (rp && rp->type_ == "tremolo" && !repeat_)
+ Direction span_dir = to_dir (ev->get_property ("span-direction"));
+ if (span_dir == START)
{
- Moment l = rp->body_length_mom ();
- repeat_ = rp;
- start_mom_ = now_mom ();
- stop_mom_ = start_mom_ + l;
-
- // ugh. should generate dots, triplet beams.
- note_head_i_ = l.den () <? 4;
- return true;
+ ASSIGN_EVENT_ONCE (repeat_, ev);
}
- return false;
-}
-
-void
-Chord_tremolo_engraver::do_process_music ()
-{
- if (repeat_ && !beam_p_)
+ else if (span_dir == STOP)
{
- beam_p_ = new Beam (get_property ("basicBeamProperties"));
- beam_p_->set_elt_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_element (Score_element_info (beam_p_, repeat_));
+ if (!repeat_)
+ ev->origin ()->warning (_ ("No tremolo to end"));
+ repeat_ = 0;
+ beam_ = 0;
+ previous_stem_ = 0;
}
}
-
void
-Chord_tremolo_engraver::do_removal_processing ()
+Chord_tremolo_engraver::process_music ()
{
- typeset_beam ();
- if (beam_p_)
+ if (repeat_ && !beam_)
{
- repeat_->warning (_ ("unterminated chord tremolo"));
- finished_beam_p_ = beam_p_;
- typeset_beam ();
+ beam_ = make_spanner ("Beam", repeat_->self_scm ());
}
}
void
-Chord_tremolo_engraver::typeset_beam ()
+Chord_tremolo_engraver::finalize ()
{
- if (finished_beam_p_)
+ if (beam_)
{
- typeset_element (finished_beam_p_);
- finished_beam_p_ = 0;
+ repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
+ announce_end_grob (beam_, SCM_EOL);
+ beam_->suicide ();
}
}
-
void
-Chord_tremolo_engraver::acknowledge_element (Score_element_info info)
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- if (beam_p_)
+ if (beam_)
{
- if (Stem::has_interface (info.elem_l_))
- {
- Score_element * s = info.elem_l_;
- int f = Stem::flag_i (s);
- f = (f > 2) ? f - 2 : 1;
- Stem::set_beaming (s, f, LEFT);
- Stem::set_beaming (s, f, RIGHT);
-
- /*
- URG: this sets the direction of the Stem s.
- It's amazing Mike:
-
- Stem:: type_i () ->first_head ()->get_direction () ->
- Directional_element_interface (me).set (d);
-
-
- don't understand this comment.
- --hwn.
- */
- SCM d = s->get_elt_property ("direction");
- if (Stem::type_i (s ) != 1)
- {
- int gap_i =Stem::flag_i (s ) - ((Stem::type_i (s ) >? 2) - 2);
- beam_p_->set_elt_property ("beam-gap", gh_int2scm(gap_i));
- }
- s->set_elt_property ("direction", d);
-
- if (Rhythmic_req* r = dynamic_cast <Rhythmic_req *> (info.req_l_))
- {
- beam_p_->add_stem (s);
- Moment stem_location = now_mom () -
- start_mom_ + beam_start_location_;
- }
- else
- {
- String s = _ ("stem must have Rhythmic structure");
- if (info.req_l_)
- info.req_l_->warning (s);
- else
- ::warning (s);
- }
- }
- if (Note_head::has_interface (info.elem_l_))
- {
- info.elem_l_->set_elt_property ("duration-log", gh_int2scm (intlog2 (note_head_i_)));
- }
+ 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::do_post_move_processing ()
+Chord_tremolo_engraver::boot ()
{
- if (beam_p_ && stop_mom_ == now_mom ())
- {
- finished_beam_p_ = beam_p_;
-
- repeat_ = 0;
- beam_p_ = 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.",
-void
-Chord_tremolo_engraver::do_pre_move_processing ()
-{
- typeset_beam ();
-}
+ /* create */
+ "Beam ",
-ADD_THIS_TRANSLATOR(Chord_tremolo_engraver);
+ /* read */
+ "",
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff