2 span-arpeggio-engraver.cc -- implement Span_arpeggio_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2003 Jan Nieuwenhuizen <janneke@gnu.org>
8 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #include "engraver.hh"
12 #include "lily-guile.hh"
14 #include "arpeggio.hh"
15 #include "group-interface.hh"
16 #include "side-position-interface.hh"
17 #include "staff-symbol-referencer.hh"
21 Make arpeggios that span multiple staves. Catch arpeggios, and span a
22 Span_arpeggio over them if we find more than two arpeggios.
24 class Span_arpeggio_engraver : public Engraver
27 TRANSLATOR_DECLARATIONS(Span_arpeggio_engraver);
30 virtual void acknowledge_grob (Grob_info);
31 virtual void process_acknowledged_grobs ();
32 virtual void stop_translation_timestep ();
36 Link_array<Grob> arpeggios_;
40 Span_arpeggio_engraver::Span_arpeggio_engraver ()
46 Span_arpeggio_engraver::acknowledge_grob (Grob_info info)
48 if (info.origin_transes (this).size ()
49 && Arpeggio::has_interface (info.grob_))
51 arpeggios_.push (info.grob_);
56 Span_arpeggio_engraver::process_acknowledged_grobs ()
59 connectArpeggios is slightly brusque; we should really read a grob
60 property of the caught non-span arpeggios. That way, we can have
62 both non-connected and connected arps in one pianostaff.
65 if (!span_arpeggio_ && arpeggios_.size () > 1
66 && to_boolean (get_property ("connectArpeggios")))
68 span_arpeggio_ = make_item ("Arpeggio");
69 announce_grob(span_arpeggio_, SCM_EOL);
74 Span_arpeggio_engraver::stop_translation_timestep ()
79 we do this very late, to make sure we also catch `extra'
80 side-pos support like accidentals.
82 for (int i=0; i < arpeggios_.size (); i ++)
84 for (SCM s = arpeggios_[i]->get_grob_property ("stems");
85 gh_pair_p (s); s = ly_cdr (s))
86 Group_interface::add_thing (span_arpeggio_, ly_symbol2scm ("stems"), ly_car (s));
87 for (SCM s = arpeggios_[i]->get_grob_property ("side-support-elements");
88 gh_pair_p (s); s = ly_cdr (s))
89 Group_interface::add_thing (span_arpeggio_, ly_symbol2scm ("side-support-elements"), ly_car (s));
92 we can't kill the children, since we don't want to the
93 previous note to bump into the span arpeggio; so we make
95 arpeggios_[i]->set_grob_property ("molecule-callback", SCM_EOL);
98 typeset_grob (span_arpeggio_);
106 ENTER_DESCRIPTION(Span_arpeggio_engraver,
108 /* creats*/ "Arpeggio",
110 /* acks */ "arpeggio-interface",
111 /* reads */ "connectArpeggios",