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 ();
36 Repeat_acknowledge_engraver::initialize ()
38 context ()->set_property ("repeatCommands", SCM_EOL);
41 Repeat_acknowledge_engraver::Repeat_acknowledge_engraver ()
46 Repeat_acknowledge_engraver::start_translation_timestep ()
48 Context *tr = context ()->where_defined (ly_symbol2scm ("repeatCommands"));
52 tr->set_property ("repeatCommands", SCM_EOL);
56 Repeat_acknowledge_engraver::process_music ()
59 At the start of a piece, we don't print any repeat bars.
61 if (!now_mom ().main_part_)
64 SCM cs = get_property ("repeatCommands");
69 bool volta_found = false;
70 while (scm_is_pair (cs))
72 SCM command = scm_car (cs);
73 if (command == ly_symbol2scm ("start-repeat"))
75 else if (command == ly_symbol2scm ("end-repeat"))
77 else if (scm_is_pair (command) && scm_car (command) == ly_symbol2scm ("volta"))
90 TODO: line breaks might be allowed if we set whichBar to "".
94 We only set the barline if we wouldn't overwrite a previously set
97 SCM wb = get_property ("whichBar");
98 SCM db = get_property ("defaultBarType");
99 if (!scm_is_string (wb) || ly_c_equal_p (db, wb))
101 if (s != "" || (volta_found && !scm_is_string (wb)))
103 context ()->set_property ("whichBar", scm_makfrom0str (s.to_str0 ()));
108 ADD_TRANSLATOR (Repeat_acknowledge_engraver,
109 /* descr */ "Acknowledge repeated music, and convert the contents of "
110 "repeatCommands ainto an appropriate setting for whichBar.",
114 /* reads */ "repeatCommands whichBar",