4 abbreviation-beam-engraver.cc -- implement Abbreviation_beam_engraver
6 source file of the GNU LilyPond music typesetter
8 (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 Jan Nieuwenhuizen <janneke@gnu.org>
12 #include "duration-convert.hh"
13 #include "time-description.hh"
14 #include "abbreviation-beam-engraver.hh"
16 #include "abbreviation-beam.hh"
17 #include "musical-request.hh"
21 ADD_THIS_TRANSLATOR(Abbreviation_beam_engraver);
23 Abbreviation_beam_engraver::Abbreviation_beam_engraver ()
25 span_reqs_drul_[LEFT] = span_reqs_drul_[RIGHT] = 0;
30 Abbreviation_beam_engraver::do_try_music (Music*r)
32 Abbreviation_beam_req * b = dynamic_cast <Abbreviation_beam_req *> (r);
37 if (bool (abeam_p_) == bool (b->span_dir_ == START))
40 Direction d = (!abeam_p_) ? LEFT : RIGHT;
41 if (span_reqs_drul_[d] && !span_reqs_drul_[d]->equal_b (b))
44 span_reqs_drul_[d] = b;
49 Abbreviation_beam_engraver::do_process_requests ()
51 if (!abeam_p_ && span_reqs_drul_[LEFT]) {
52 abeam_p_ = new Abbreviation_beam;
53 announce_element (Score_element_info (abeam_p_, span_reqs_drul_[LEFT]));
58 Abbreviation_beam_engraver::do_pre_move_processing ()
60 if (abeam_p_ && span_reqs_drul_[RIGHT]) {
61 typeset_element (abeam_p_);
64 span_reqs_drul_[RIGHT] =
65 span_reqs_drul_[LEFT] = 0;
70 Abbreviation_beam_engraver::do_removal_processing ()
74 span_reqs_drul_[LEFT]->warning (_("unterminated beam"));
75 typeset_element (abeam_p_);
81 Abbreviation_beam_engraver::acknowledge_element (Score_element_info i)
83 Stem* s = dynamic_cast<Stem *> (i.elem_l_);
87 int type_i = span_reqs_drul_[LEFT]->type_i_;
88 s->flag_i_ = intlog2 (type_i) - 2;
89 s->beams_i_drul_[(span_reqs_drul_[RIGHT]) ? LEFT: RIGHT] = s->flag_i_;
91 abeam_p_->multiple_i_ = s->flag_i_;
92 if (s->type_i () != 1) // no abbrev gaps on half note
93 s->set_elt_property (beam_gap_scm_sym,
94 gh_int2scm(s->flag_i_ - ((s->type_i () >? 2) - 2)));
96 abeam_p_->add_stem (s);