+/*
+new-lyric-combine-iterator.cc -- implement New_lyric_combine_music_iterator
+
+source file of the GNU LilyPond music typesetter
+
+(c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+ */
+
+#include "translator-group.hh"
+#include "lyric-combine-music.hh"
+#include "event.hh"
+#include "grob.hh"
+#include "music-iterator.hh"
+
+
+class New_lyric_combine_music_iterator : public Music_iterator
+{
+public:
+ VIRTUAL_COPY_CONS (Music_iterator);
+ New_lyric_combine_music_iterator ();
+ New_lyric_combine_music_iterator (New_lyric_combine_music_iterator const&src);
+ DECLARE_SCHEME_CALLBACK(constructor, ());
+protected:
+ virtual void construct_children ();
+ virtual Moment pending_moment () const;
+ virtual void do_quit();
+ virtual void process (Moment);
+ virtual Music_iterator *try_music_in_children (Music *) const;
+ virtual bool run_always ()const;
+ virtual bool ok () const;
+ virtual void derived_mark () const;
+private:
+ bool start_new_syllable () ;
+
+ Translator_group * lyrics_context_;
+ Translator_group* music_context_;
+ Music_iterator * lyric_iter_;
+};
+
+/*
+ Ugh, why static?
+ */
+static Music *busy_ev;
+static Music *start_ev;
+static Music *melisma_playing_ev;
+
+New_lyric_combine_music_iterator::New_lyric_combine_music_iterator ()
+{
+ lyric_iter_ =0;
+ music_context_ =0;
+ lyrics_context_ = 0;
+ if (!busy_ev)
+ {
+ busy_ev
+ = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
+ start_ev
+ = make_music_by_name (ly_symbol2scm ("StartPlayingEvent"));
+ melisma_playing_ev
+ = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
+ }
+}
+
+bool
+New_lyric_combine_music_iterator::start_new_syllable ()
+{
+ bool b = music_context_->try_music (busy_ev);
+
+ if (!b)
+ return false;
+
+ if (!to_boolean (lyrics_context_->get_property ("ignoreMelismata")))
+ {
+ bool m = music_context_->try_music (melisma_playing_ev);
+ if (m)
+ return false;
+ }
+
+ return true;
+}
+
+Moment
+New_lyric_combine_music_iterator::pending_moment () const
+{
+ Moment m;
+
+ m.set_infinite (1);
+
+ return m;
+}
+
+bool
+New_lyric_combine_music_iterator::run_always () const
+{
+ return true;
+}
+
+bool
+New_lyric_combine_music_iterator::ok () const
+{
+ return music_context_ && lyric_iter_->ok ();
+}
+
+void
+New_lyric_combine_music_iterator::derived_mark()const
+{
+ if (lyric_iter_)
+ scm_gc_mark (lyric_iter_->self_scm ());
+ if (lyrics_context_)
+ scm_gc_mark (lyrics_context_->self_scm ());
+ if (music_context_)
+ scm_gc_mark (music_context_->self_scm ());
+}
+
+/*
+ ID == "" means accept any ID.
+ */
+Translator_group *
+find_context_below (Translator_group * where,
+ String type, String id)
+{
+ if (where->context_name () == type)
+ {
+ if (id == "" || where->id_string_ == id)
+ return where;
+ }
+
+ Translator_group * found = 0;
+ for (SCM s = where->trans_group_list_;
+ !found && gh_pair_p (s); s = gh_cdr (s))
+ {
+ Translator_group * tr = dynamic_cast<Translator_group*> (unsmob_translator (gh_car (s)));
+
+
+ found = find_context_below (tr, type, id);
+ }
+
+ return found;
+}
+
+
+
+void
+New_lyric_combine_music_iterator::construct_children ()
+{
+ Music *m = unsmob_music (get_music ()->get_mus_property ("element"));
+ lyric_iter_ = unsmob_iterator (get_iterator (m));
+
+ SCM voice_name = get_music ()->get_mus_property ("associated-context");
+
+
+ Translator_group * thread = 0, *voice =0;
+
+ if (gh_string_p (voice_name))
+ {
+ Translator_group *t = report_to ();
+ while (t && t->daddy_trans_)
+ t = t->daddy_trans_;
+
+ voice = find_context_below (t, "Voice", ly_scm2string (voice_name));
+ if (voice)
+ thread = find_context_below (voice, "Thread", "");
+ }
+
+ if (thread)
+ {
+ music_context_ = thread;
+ lyrics_context_ = find_context_below (lyric_iter_->report_to (), "LyricsVoice", "");
+
+ if (lyrics_context_)
+ lyrics_context_->set_property ("associatedVoiceContext", voice->self_scm ());
+ }
+}
+
+void
+New_lyric_combine_music_iterator::process (Moment )
+{
+ if (!music_context_->daddy_trans_)
+ {
+ music_context_ = 0;
+ if (lyrics_context_)
+ lyrics_context_->unset_property (ly_symbol2scm ("associatedVoiceContext"));
+ }
+
+ if (music_context_
+ && start_new_syllable () && lyric_iter_->ok ())
+ {
+ Moment m= lyric_iter_->pending_moment ();
+ lyric_iter_->process (m);
+ }
+}
+
+void
+New_lyric_combine_music_iterator::do_quit ()
+{
+ if (lyric_iter_)
+ lyric_iter_->quit();
+}
+
+New_lyric_combine_music_iterator::New_lyric_combine_music_iterator (New_lyric_combine_music_iterator const & src)
+ : Music_iterator (src)
+{
+ lyric_iter_ = 0;
+
+ if (src.lyric_iter_)
+ lyric_iter_ = src.lyric_iter_->clone ();
+
+ if (lyric_iter_)
+ scm_gc_unprotect_object (lyric_iter_->self_scm());
+
+ music_context_ = src.music_context_;
+ lyric_iter_ = src.lyric_iter_;
+
+
+ assert (false); // shouldn't copy, really.
+}
+
+
+Music_iterator*
+New_lyric_combine_music_iterator::try_music_in_children (Music *m) const
+{
+ return lyric_iter_->try_music (m);
+}
+
+
+IMPLEMENT_CTOR_CALLBACK (New_lyric_combine_music_iterator);