2 measure-grouping-engraver.cc -- implement Measure_grouping_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "side-position-interface.hh"
12 #include "global-context.hh"
13 #include "engraver.hh"
15 class Measure_grouping_engraver
: public Engraver
18 TRANSLATOR_DECLARATIONS (Measure_grouping_engraver
);
22 Rational stop_grouping_mom_
;
24 virtual void process_music ();
25 virtual void finalize ();
26 virtual void acknowledge_grob (Grob_info
);
30 Measure_grouping_engraver::finalize ()
34 grouping_
->set_bound (RIGHT
, unsmob_grob (get_property ("currentCommandColumn")));
35 grouping_
->suicide ();
42 Measure_grouping_engraver::acknowledge_grob (Grob_info gi
)
46 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 grouping
= get_property ("beatGrouping");
66 if (ly_c_pair_p (grouping
))
68 Moment
*measpos
= unsmob_moment (get_property ("measurePosition"));
69 Rational mp
= measpos
->main_part_
;
71 Moment
* beatlen
= unsmob_moment (get_property ("beatLength"));
72 Rational bl
= beatlen
->main_part_
;
75 for (SCM s
= grouping
; ly_c_pair_p (s
);
76 where
+= Rational (ly_scm2int (ly_car (s
))) * bl
,
80 int grouplen
= ly_scm2int (ly_car (s
));
85 programming_error ("Huh, last grouping not finished yet.");
89 grouping_
= make_spanner ("MeasureGrouping", SCM_EOL
);
90 grouping_
->set_bound (LEFT
, unsmob_grob (get_property ("currentMusicalColumn")));
94 stop_grouping_mom_
= now
.main_part_
+ Rational (grouplen
- 1) * bl
;
95 get_global_context ()->add_moment_to_process (Moment (stop_grouping_mom_
));
98 grouping_
->set_property ("style", ly_symbol2scm ("triangle"));
100 grouping_
->set_property ("style", ly_symbol2scm ("bracket"));
107 Measure_grouping_engraver::Measure_grouping_engraver ()
112 ENTER_DESCRIPTION (Measure_grouping_engraver
,
113 /* descr */ "Creates Measure_grouping objects using beatGrouping property",
114 /* creats*/ "MeasureGrouping",
116 /* acks */ "note-column-interface",
117 /* reads */ "beatGrouping beatLength measurePosition currentMusicalColumn",