2 repeat-acknowledge-engraver.cc -- implement Repeat_acknowledge_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "translator-group.hh"
12 #include "repeated-music.hh"
17 -- set and reset repeatCommands, so Unfolded_repeat_iterator knows
18 where to set variables.
20 -- collect information passed by Unfolded_repeat_iterator for
21 Bar_engraver: writes whichBar property. (TODO: check for
22 interactions with timing engraver.)
24 class Repeat_acknowledge_engraver : public Engraver
28 TRANSLATOR_DECLARATIONS (Repeat_acknowledge_engraver);
30 virtual void start_translation_timestep ();
31 virtual void process_music ();
32 virtual void initialize ();
37 Repeat_acknowledge_engraver::initialize ()
39 context ()->set_property ("repeatCommands", SCM_EOL);
42 Repeat_acknowledge_engraver::Repeat_acknowledge_engraver ()
47 Repeat_acknowledge_engraver::start_translation_timestep ()
49 Context *tr = context ()->where_defined (ly_symbol2scm ("repeatCommands"));
53 tr->set_property ("repeatCommands", SCM_EOL);
57 Repeat_acknowledge_engraver::process_music ()
60 At the start of a piece, we don't print any repeat bars.
62 if (!now_mom ().main_part_)
65 SCM cs = get_property ("repeatCommands");
70 bool volta_found = false;
71 while (scm_is_pair (cs))
73 SCM command = scm_car (cs);
74 if (command == ly_symbol2scm ("start-repeat"))
76 else if (command == ly_symbol2scm ("end-repeat"))
78 else if (scm_is_pair (command) && scm_car (command) == ly_symbol2scm ("volta"))
91 TODO: line breaks might be allowed if we set whichBar to "".
95 We only set the barline if we wouldn't overwrite a previously set
98 SCM wb = get_property ("whichBar");
99 SCM db = get_property ("defaultBarType");
100 if (!scm_is_string (wb) || ly_c_equal_p (db, wb))
102 if (s != "" || (volta_found && !scm_is_string (wb)))
104 context ()->set_property ("whichBar", scm_makfrom0str (s.to_str0 ()));
109 ADD_TRANSLATOR (Repeat_acknowledge_engraver,
110 /* descr */ "Acknowledge repeated music, and convert the contents of "
111 "repeatCommands ainto an appropriate setting for whichBar.",
115 /* reads */ "repeatCommands whichBar",