2 repeat-acknowledge-engraver.cc -- implement Repeat_acknowledge_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "engraver.hh"
11 #include "translator-group.hh"
13 #include "repeated-music.hh"
19 -- set and reset repeatCommands, so Unfolded_repeat_iterator knows
20 where to set variables.
22 -- collect information passed by Unfolded_repeat_iterator for
23 Bar_engraver: writes whichBar property. (TODO: check for
24 interactions with timing engraver.)
27 class Repeat_acknowledge_engraver
: public Engraver
30 TRANSLATOR_DECLARATIONS (Repeat_acknowledge_engraver
);
32 virtual void start_translation_timestep ();
33 virtual void process_music ();
34 virtual void initialize ();
39 Repeat_acknowledge_engraver::initialize ()
41 daddy_context_
->set_property ("repeatCommands", SCM_EOL
);
45 Repeat_acknowledge_engraver::Repeat_acknowledge_engraver ()
50 Repeat_acknowledge_engraver::start_translation_timestep ()
52 Context
* tr
= daddy_context_
->where_defined (ly_symbol2scm ("repeatCommands"));
56 tr
->set_property ("repeatCommands", SCM_EOL
);
60 Repeat_acknowledge_engraver::process_music ()
63 At the start of a piece, we don't print any repeat bars.
65 if (now_mom () == Moment (0))
68 SCM cs
= get_property ("repeatCommands");
73 bool volta_found
= false;
74 while (ly_pair_p (cs
))
76 SCM command
= ly_car (cs
);
77 if (command
== ly_symbol2scm ("start-repeat"))
79 else if (command
== ly_symbol2scm ("end-repeat"))
81 else if (ly_pair_p (command
) && ly_car (command
) == ly_symbol2scm ("volta"))
94 TODO: line breaks might be allowed if we set whichBar to "".
98 We only set the barline if we wouldn't overwrite a previously set
101 SCM wb
= get_property ("whichBar");
102 SCM db
= get_property ("defaultBarType");
103 if (!ly_string_p (wb
) || ly_equal_p (db
, wb
))
105 if (s
!= "" || (volta_found
&& !ly_string_p (wb
)))
107 daddy_context_
->set_property ("whichBar", scm_makfrom0str (s
.to_str0 ()));
112 ENTER_DESCRIPTION (Repeat_acknowledge_engraver
,
113 /* descr */ "Acknowledge repeated music, and convert the contents of "
114 "repeatCommands ainto an appropriate setting for whichBar.",
118 /* reads */ "repeatCommands whichBar",