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volta-repeat-iterator.cc -- implement Volta_repeat_iterator
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source file of the GNU LilyPond music typesetter
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(c) 2002--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
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#include "sequential-iterator.hh"
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class Volta_repeat_iterator : public Sequential_iterator
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DECLARE_SCHEME_CALLBACK (constructor, ());
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Volta_repeat_iterator ();
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void add_repeat_command (SCM);
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virtual SCM get_music_list () const;
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virtual void next_element (bool);
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virtual void construct_children ();
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virtual void process (Moment);
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Volta_repeat_iterator::Volta_repeat_iterator ()
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done_count_ = alt_count_ = rep_count_ = 0;
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Volta_repeat_iterator::get_music_list ()const
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return scm_cons (get_music ()->get_property ("element"),
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get_music ()->get_property ("elements"));
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Volta_repeat_iterator::construct_children ()
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Sequential_iterator::construct_children ();
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SCM alts = get_music ()->get_property ("elements");
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alt_count_ = scm_ilength (alts);
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rep_count_ = scm_to_int (get_music ()->get_property ("repeat-count"));
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TODO: add source information for debugging
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Volta_repeat_iterator::add_repeat_command (SCM what)
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SCM reps = ly_symbol2scm ("repeatCommands");
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SCM current_reps = SCM_EOL;
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Context *where = get_outlet ()->where_defined (reps, ¤t_reps);
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&& current_reps == SCM_EOL || scm_is_pair (current_reps))
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current_reps = scm_cons (what, current_reps);
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where->internal_set_property (reps, current_reps);
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Volta_repeat_iterator::next_element (bool side_effect)
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Sequential_iterator::next_element (side_effect);
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string repstr = to_string (rep_count_ - alt_count_ + done_count_) + ".";
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add_repeat_command (scm_list_n (ly_symbol2scm ("volta"), SCM_BOOL_F, SCM_UNDEFINED));
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if (done_count_ - 1 < alt_count_)
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add_repeat_command (ly_symbol2scm ("end-repeat"));
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if (done_count_ == 1 && alt_count_ < rep_count_)
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repstr = "1.--" + to_string (rep_count_ - alt_count_ + done_count_) + ".";
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if (done_count_ <= alt_count_)
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add_repeat_command (scm_list_n (ly_symbol2scm ("volta"),
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scm_makfrom0str (repstr.c_str ()), SCM_UNDEFINED));
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add_repeat_command (ly_symbol2scm ("end-repeat"));
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Volta_repeat_iterator::process (Moment m)
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add_repeat_command (ly_symbol2scm ("start-repeat"));
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Sequential_iterator::process (m);
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IMPLEMENT_CTOR_CALLBACK (Volta_repeat_iterator);