/*
- abbreviation-beam-engraver.cc -- implement Chord_tremolo_engraver
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2000--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Erik Sandberg <mandolaerik@gmail.com>
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
+ 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 "duration-convert.hh"
-#include "time-description.hh"
-#include "chord-tremolo-engraver.hh"
-#include "stem.hh"
-#include "chord-tremolo.hh"
-#include "musical-request.hh"
+#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 "rhythmic-head.hh"
+#include "spanner.hh"
+#include "stem-tremolo.hh"
+#include "stem.hh"
+#include "stream-event.hh"
#include "warn.hh"
-#include "score-engraver.hh"
-ADD_THIS_TRANSLATOR (Chord_tremolo_engraver);
+#include "translator.icc"
-Chord_tremolo_engraver::Chord_tremolo_engraver ()
-{
- reqs_drul_[LEFT] = reqs_drul_[RIGHT] = 0;
- abeam_p_ = 0;
- finished_abeam_p_ = 0;
- prev_start_req_ = 0;
-}
+/**
-bool
-Chord_tremolo_engraver::do_try_music (Music* m)
-{
- if (Chord_tremolo_req* b = dynamic_cast <Chord_tremolo_req *> (m))
- {
- Direction d = b->span_dir_;
- if (reqs_drul_[d] && !reqs_drul_[d]->equal_b (b))
- return false;
-
- if ((d == STOP) && !abeam_p_)
- {
- m->warning (_ ("no tremolo beam to end"));
- return false;
- }
-
- reqs_drul_[d] = b;
- return true;
- }
+This acknowledges repeated music with "tremolo" style. It typesets
+a beam.
- return false;
+TODO:
+
+- 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
+{
+ TRANSLATOR_DECLARATIONS (Chord_tremolo_engraver);
+protected:
+ 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 ();
+ void process_music ();
+ void listen_tremolo_span (Stream_event *);
+ void acknowledge_stem (Grob_info);
+};
+
+Chord_tremolo_engraver::Chord_tremolo_engraver (Context *c)
+ : Engraver (c)
+{
+ beam_ = 0;
+ repeat_ = 0;
+ previous_stem_ = 0;
}
void
-Chord_tremolo_engraver::do_process_requests ()
+Chord_tremolo_engraver::listen_tremolo_span (Stream_event *ev)
{
- if (reqs_drul_[STOP])
+ Direction span_dir = to_dir (ev->get_property ("span-direction"));
+ if (span_dir == START)
{
- if (!abeam_p_)
- reqs_drul_[STOP]->warning (_ ("no tremolo beam to end"));
- prev_start_req_ = 0;
- finished_abeam_p_ = abeam_p_;
- abeam_p_ = 0;
+ ASSIGN_EVENT_ONCE (repeat_, ev);
}
-
- if (abeam_p_)
+ else if (span_dir == STOP)
{
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
- {
- e = dynamic_cast<Score_engraver*> (t);
- }
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks ();
+ if (!repeat_)
+ ev->origin ()->warning (_ ("No tremolo to end"));
+ repeat_ = 0;
+ beam_ = 0;
+ previous_stem_ = 0;
}
-
- if (reqs_drul_[START])
- {
- if (abeam_p_)
- {
- reqs_drul_[START]->warning (_ ("Already have a tremolo beam"));
- return;
- }
-
- prev_start_req_ = reqs_drul_[START];
-
- abeam_p_ = new Chord_tremolo;
- announce_element (Score_element_info (abeam_p_, reqs_drul_[LEFT]));
- }
}
void
-Chord_tremolo_engraver::do_post_move_processing ()
+Chord_tremolo_engraver::process_music ()
{
- reqs_drul_ [START] = 0;
-}
-
-void
-Chord_tremolo_engraver::do_pre_move_processing ()
-{
- typeset_beam ();
+ if (repeat_ && !beam_)
+ {
+ beam_ = make_spanner ("Beam", repeat_->self_scm ());
+ }
}
void
-Chord_tremolo_engraver::typeset_beam ()
+Chord_tremolo_engraver::finalize ()
{
- if (finished_abeam_p_)
+ if (beam_)
{
- typeset_element (finished_abeam_p_);
- finished_abeam_p_ = 0;
-
- reqs_drul_[STOP] = 0;
+ repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
+ announce_end_grob (beam_, SCM_EOL);
+ beam_->suicide ();
}
}
void
-Chord_tremolo_engraver::do_removal_processing ()
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- typeset_beam ();
- if (abeam_p_)
+ if (beam_)
{
- prev_start_req_->warning (_ ("unfinished tremolo beam"));
- finished_abeam_p_ = abeam_p_;
- typeset_beam ();
+ 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::acknowledge_element (Score_element_info i)
+Chord_tremolo_engraver::boot ()
{
- if (abeam_p_)
- {
- if (Stem* s = dynamic_cast<Stem *> (i.elem_l_))
- {
- int type_i = prev_start_req_->type_i_;
- s->flag_i_ = intlog2 (type_i) - 2;
-
- s->beams_i_drul_[LEFT] = s->flag_i_;
- s->beams_i_drul_[RIGHT] = s->flag_i_;
-
- abeam_p_->multiple_i_ = s->flag_i_;
- /*
- abbrev gaps on all but half note
- */
-#if 0
- if (s->type_i () != 1)
- {
- int gap_i =s->flag_i_ - ((s->type_i () >? 2) - 2);
- s->set_elt_property (beam_gap_scm_sym, gh_int2scm(gap_i));
- }
-#else
- if (s->type_i () != 1)
- {
- int gap_i =s->flag_i_ - ((s->type_i () >? 2) - 2);
- abeam_p_->set_elt_property (beam_gap_scm_sym, gh_int2scm(gap_i));
- }
-#endif
-
- abeam_p_->add_stem (s);
- }
- }
+ 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 */
+ "",
+
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff