source file of the GNU LilyPond music typesetter
- (c) 2004--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 2004--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "dispatcher.hh"
#include "music-iterator.hh"
#include "music.hh"
+/*
+ This iterator is hairy. It tracks both lyric and melody contexts,
+ and has a complicated communication route, reading/writing
+ properties in both.
+
+ In the future, this should rather be done with
+
+ \interpretAsMelodyFor { MUSIC } { LYRICS LYRICS LYRICS }
+
+ This can run an interpret step on MUSIC, generating a stream. Then
+ the stream can be perused at leisure to apply durations to all of
+ the LYRICS.
+*/
+
class Lyric_combine_music_iterator : public Music_iterator
{
public:
virtual void derived_substitute (Context *, Context *);
void set_music_context (Context *to);
private:
- bool start_new_syllable ();
+ bool start_new_syllable () const;
Context *find_voice ();
DECLARE_LISTENER (set_busy);
DECLARE_LISTENER (check_new_context);
- bool pending_grace_lyric_;
bool music_found_;
Context *lyrics_context_;
Context *music_context_;
SCM lyricsto_voice_name_;
- bool busy_;
+ Moment busy_moment_;
+ Moment pending_grace_moment_;
+
Music_iterator *lyric_iter_;
};
Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
{
music_found_ = false;
- pending_grace_lyric_ = false;
+ pending_grace_moment_.set_infinite (1);
lyric_iter_ = 0;
music_context_ = 0;
lyrics_context_ = 0;
- busy_ = false;
+ busy_moment_.set_infinite (-1);
}
+
+/*
+ It's dubious whether we can ever make this fully work. Due to
+ associatedVoice switching, this routine may be triggered for
+ the wrong music_context_
+ */
IMPLEMENT_LISTENER (Lyric_combine_music_iterator, set_busy)
void
Lyric_combine_music_iterator::set_busy (SCM se)
{
Stream_event *e = unsmob_stream_event (se);
- if (e->in_event_class ("note-event") || e->in_event_class ("cluster-note-event"))
- busy_ = true;
+ if ((e->in_event_class ("note-event") || e->in_event_class ("cluster-note-event"))
+ && music_context_)
+
+ busy_moment_ = max (music_context_->now_mom (),
+ busy_moment_);
+
}
void
{
if (music_context_)
{
- music_context_->event_source()->remove_listener (GET_LISTENER (set_busy), ly_symbol2scm ("music-event"));
- lyrics_context_->unset_property (ly_symbol2scm ("associatedVoiceContext"));
+ music_context_->event_source ()->
+ remove_listener (GET_LISTENER (set_busy), ly_symbol2scm ("music-event"));
}
+
music_context_ = to;
if (to)
{
- to->event_source()->add_listener (GET_LISTENER (set_busy), ly_symbol2scm ("music-event"));
- lyrics_context_->set_property ("associatedVoiceContext", to->self_scm ());
+ to->event_source ()->add_listener (GET_LISTENER (set_busy),
+ ly_symbol2scm ("music-event"));
}
}
bool
-Lyric_combine_music_iterator::start_new_syllable ()
+Lyric_combine_music_iterator::start_new_syllable () const
{
- if (!busy_)
+ if (busy_moment_ < music_context_->now_mom ())
return false;
- busy_ = false;
-
if (!lyrics_context_)
return false;
lyrics_context_ = find_context_below (lyric_iter_->get_outlet (),
ly_symbol2scm ("Lyrics"), "");
+ if (!lyrics_context_)
+ {
+ m->origin ()->warning ("argument of \\lyricsto should contain Lyrics context");
+ }
+
lyricsto_voice_name_ = get_music ()->get_property ("associated-context");
Context *voice = find_voice ();
if (voice)
set_music_context (voice);
- else
- {
- /*
- Wait for a Create_context event. If this isn't done, lyrics can be
- delayed when voices are created implicitly.
- */
- Global_context *g = lyrics_context_->get_global_context ();
- g->events_below ()->add_listener (GET_LISTENER (check_new_context), ly_symbol2scm ("CreateContext"));
- }
+
+ /*
+ Wait for a Create_context event. If this isn't done, lyrics can be
+ delayed when voices are created implicitly.
+ */
+ Global_context *g = get_outlet ()->get_global_context ();
+ g->events_below ()->add_listener (GET_LISTENER (check_new_context), ly_symbol2scm ("CreateContext"));
/*
We do not create a Lyrics context, because the user might
void
Lyric_combine_music_iterator::check_new_context (SCM sev)
{
+ if (!ok ())
+ return ;
+
// TODO: Check first if type=Voice and if id matches
- (void)sev;
-
+ Stream_event * ev = unsmob_stream_event (sev);
+ if (ev->get_property ("type") != ly_symbol2scm ("Voice"))
+ return ;
+
Context *voice = find_voice ();
+
if (voice)
{
set_music_context (voice);
-
- Global_context *g = voice->get_global_context ();
- g->events_below ()->remove_listener (GET_LISTENER (check_new_context), ly_symbol2scm ("CreateContext"));
}
}
}
void
-Lyric_combine_music_iterator::process (Moment)
+Lyric_combine_music_iterator::process (Moment /* when */)
{
/* see if associatedVoice has been changed */
Context *new_voice = find_voice ();
set_music_context (0);
}
+
if (music_context_
- && (start_new_syllable () || pending_grace_lyric_)
+ && (start_new_syllable () ||
+ (busy_moment_ >= pending_grace_moment_))
&& lyric_iter_->ok ())
{
- if (music_context_->now_mom ().grace_part_)
+ Moment now = music_context_->now_mom ();
+ if (now.grace_part_)
{
- pending_grace_lyric_ = true;
+ pending_grace_moment_ = now;
+ pending_grace_moment_.grace_part_ = Rational (0);
return;
}
else
- pending_grace_lyric_ = false;
+ {
+ pending_grace_moment_.set_infinite (1);
+ }
Moment m = lyric_iter_->pending_moment ();
+ lyrics_context_->set_property (ly_symbol2scm ("associatedVoiceContext"),
+ music_context_->self_scm ());
lyric_iter_->process (m);
music_found_ = true;
}
+
+ new_voice = find_voice ();
+ if (new_voice)
+ set_music_context (new_voice);
}
void