2 measure-grouping-engraver.cc -- implement Measure_grouping_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "side-position-interface.hh"
11 #include "global-context.hh"
12 #include "engraver.hh"
14 class Measure_grouping_engraver : public Engraver
17 TRANSLATOR_DECLARATIONS (Measure_grouping_engraver);
21 Rational stop_grouping_mom_;
23 virtual void process_music ();
24 virtual void finalize ();
25 virtual void acknowledge_grob (Grob_info);
29 Measure_grouping_engraver::finalize ()
33 grouping_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
34 grouping_->suicide ();
40 Measure_grouping_engraver::acknowledge_grob (Grob_info gi)
44 Side_position_interface::add_support (grouping_, gi.grob_);
49 Measure_grouping_engraver::process_music ()
51 Moment now = now_mom ();
52 if (grouping_ && now.main_part_ >= stop_grouping_mom_ && !now.grace_part_)
54 grouping_->set_bound (RIGHT,
55 unsmob_grob (get_property ("currentMusicalColumn")));
63 SCM grouping = get_property ("beatGrouping");
64 if (scm_is_pair (grouping))
66 Moment *measpos = unsmob_moment (get_property ("measurePosition"));
67 Rational mp = measpos->main_part_;
69 Moment *beatlen = unsmob_moment (get_property ("beatLength"));
70 Rational bl = beatlen->main_part_;
73 for (SCM s = grouping; scm_is_pair (s);
74 where += Rational ((int) scm_to_int (scm_car (s))) * bl,
77 int grouplen = scm_to_int (scm_car (s));
82 programming_error ("last grouping not finished yet");
86 grouping_ = make_spanner ("MeasureGrouping", SCM_EOL);
87 grouping_->set_bound (LEFT, unsmob_grob (get_property ("currentMusicalColumn")));
89 stop_grouping_mom_ = now.main_part_ + Rational (grouplen - 1) * bl;
90 get_global_context ()->add_moment_to_process (Moment (stop_grouping_mom_));
93 grouping_->set_property ("style", ly_symbol2scm ("triangle"));
95 grouping_->set_property ("style", ly_symbol2scm ("bracket"));
102 Measure_grouping_engraver::Measure_grouping_engraver ()
107 ADD_TRANSLATOR (Measure_grouping_engraver,
108 /* descr */ "Creates MeasureGrouping to indicate beat subdivision.",
109 /* creats*/ "MeasureGrouping",
111 /* acks */ "note-column-interface",
112 /* reads */ "beatGrouping beatLength measurePosition currentMusicalColumn",