2 measure-grouping-engraver.cc -- implement Measure_grouping_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "side-position-interface.hh"
11 #include "global-context.hh"
12 #include "engraver.hh"
14 #include "beam-settings.hh"
16 #include "translator.icc"
18 class Measure_grouping_engraver : public Engraver
21 TRANSLATOR_DECLARATIONS (Measure_grouping_engraver);
25 Rational stop_grouping_mom_;
27 void process_music ();
28 virtual void finalize ();
29 DECLARE_ACKNOWLEDGER (note_column);
33 Measure_grouping_engraver::finalize ()
37 grouping_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
38 grouping_->suicide ();
44 Measure_grouping_engraver::acknowledge_note_column (Grob_info gi)
47 Side_position_interface::add_support (grouping_, gi.grob ());
51 Measure_grouping_engraver::process_music ()
53 Moment now = now_mom ();
54 if (grouping_ && now.main_part_ >= stop_grouping_mom_ && !now.grace_part_)
56 grouping_->set_bound (RIGHT,
57 unsmob_grob (get_property ("currentMusicalColumn")));
65 SCM settings = get_property ("beamSettings");
66 SCM grouping = SCM_EOL;
67 if (scm_is_pair (settings))
69 SCM time_signature_fraction = get_property ("timeSignatureFraction");
70 grouping = ly_beam_grouping (settings,
71 time_signature_fraction,
72 ly_symbol2scm ("end"),
75 if (scm_is_pair (grouping))
77 Moment *measpos = unsmob_moment (get_property ("measurePosition"));
78 Rational mp = measpos->main_part_;
80 Moment *beatlen_mom = unsmob_moment (get_property ("beatLength"));
81 Rational beat_length = beatlen_mom->main_part_;
84 for (SCM s = grouping; scm_is_pair (s);
85 where += Rational ((int) scm_to_int (scm_car (s))) * beat_length,
88 int grouplen = scm_to_int (scm_car (s));
93 programming_error ("last grouping not finished yet");
98 grouping_ = make_spanner ("MeasureGrouping", SCM_EOL);
99 grouping_->set_bound (LEFT, unsmob_grob (get_property ("currentMusicalColumn")));
101 stop_grouping_mom_ = now.main_part_ + Rational (grouplen - 1) * beat_length;
102 get_global_context ()->add_moment_to_process (Moment (stop_grouping_mom_));
105 grouping_->set_property ("style", ly_symbol2scm ("triangle"));
107 grouping_->set_property ("style", ly_symbol2scm ("bracket"));
116 Measure_grouping_engraver::Measure_grouping_engraver ()
121 ADD_ACKNOWLEDGER (Measure_grouping_engraver, note_column);
122 ADD_TRANSLATOR (Measure_grouping_engraver,
124 "Create @code{MeasureGrouping} to indicate beat subdivision.",
131 "currentMusicalColumn "