2 abbreviation-beam-engraver.cc -- implement Abbreviation_beam_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "duration-convert.hh"
11 #include "time-description.hh"
12 #include "abbreviation-beam-engraver.hh"
14 #include "abbreviation-beam.hh"
15 #include "musical-request.hh"
19 ADD_THIS_TRANSLATOR(Abbreviation_beam_engraver);
21 Abbreviation_beam_engraver::Abbreviation_beam_engraver ()
23 span_reqs_drul_[LEFT] = span_reqs_drul_[RIGHT] = 0;
28 Abbreviation_beam_engraver::do_try_music (Music*r)
30 Abbreviation_beam_req * b = dynamic_cast <Abbreviation_beam_req *> (r);
35 if (bool (abeam_p_) == bool (b->spantype_ == START))
38 Direction d = (!abeam_p_) ? LEFT : RIGHT;
39 if (span_reqs_drul_[d] && !span_reqs_drul_[d]->equal_b (b))
42 span_reqs_drul_[d] = b;
47 Abbreviation_beam_engraver::do_process_requests ()
49 if (!abeam_p_ && span_reqs_drul_[LEFT]) {
50 abeam_p_ = new Abbreviation_beam;
51 announce_element (Score_element_info (abeam_p_, span_reqs_drul_[LEFT]));
56 Abbreviation_beam_engraver::do_pre_move_processing ()
58 if (abeam_p_ && span_reqs_drul_[RIGHT]) {
59 typeset_element (abeam_p_);
62 span_reqs_drul_[RIGHT] =
63 span_reqs_drul_[LEFT] = 0;
68 Abbreviation_beam_engraver::do_removal_processing ()
72 span_reqs_drul_[LEFT]->warning (_("unterminated beam"));
73 typeset_element (abeam_p_);
79 Abbreviation_beam_engraver::acknowledge_element (Score_element_info i)
81 Stem* s = dynamic_cast<Stem *> (i.elem_l_);
85 int type_i = span_reqs_drul_[LEFT]->type_i_;
86 s->flag_i_ = intlog2 (type_i) - 2;
87 s->beams_i_drul_[(span_reqs_drul_[RIGHT]) ? LEFT: RIGHT] = s->flag_i_;
89 abeam_p_->multiple_i_ = s->flag_i_;
90 if (s->type_i () != 1) // no abbrev gaps on half note
91 s->beam_gap_i_ = s->flag_i_ - ((s->type_i () >? 2) - 2);
93 abeam_p_->add_stem (s);