source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "lyric-engraver.hh"
-#include "musical-request.hh"
-#include "text-item.hh"
-#include "paper-def.hh"
-#include "lookup.hh"
+#include "context.hh"
+#include "engraver.hh"
+#include "font-metric.hh"
+#include "item.hh"
+#include "multi-measure-rest.hh"
+#include "note-head.hh"
+#include "rest.hh"
-Lyric_engraver::Lyric_engraver()
+/**
+ Generate texts for lyric syllables. We only do one lyric at a time.
+ Multiple copies of this engraver should be used to do multiple voices.
+*/
+class Lyric_engraver : public Engraver
+{
+protected:
+ void stop_translation_timestep ();
+ virtual bool try_music (Music *);
+ void process_music ();
+
+public:
+ TRANSLATOR_DECLARATIONS (Lyric_engraver);
+
+private:
+ Music *event_;
+ Item *text_;
+ Item *last_text_;
+
+ Context *get_voice_context ();
+};
+
+Lyric_engraver::Lyric_engraver ()
{
+ text_ = 0;
+ last_text_ = 0;
+ event_ = 0;
}
bool
-Lyric_engraver::do_try_request(Request*r)
+Lyric_engraver::try_music (Music *r)
{
- Musical_req * m =r->musical();
- if (!m || ! m->lreq_l())
- return false;
- lreq_arr_.push(m->lreq_l());
-
- return true;
+ if (!event_)
+ {
+ event_ = r;
+ return true;
+ }
+ return false;
}
void
-Lyric_engraver::do_process_requests()
+Lyric_engraver::process_music ()
{
- Text_item * last_item_l =0;
- for (int i=0; i < lreq_arr_.size(); i++) {
- Text_item *lp = new Text_item(lreq_arr_[i]->tdef_p_ );
- lp->dir_i_ = -1;
- lp->fat_b_ = true;
- if (last_item_l)
- lp->add_support(last_item_l);
- last_item_l = lp;
- typeset_element(lp);
+ if (event_)
+ {
+ SCM text = event_->get_property ("text");
+
+ if (ly_is_equal (text, scm_makfrom0str (" ")))
+ {
+ if (last_text_)
+ last_text_->set_property ("self-alignment-X", scm_from_int (LEFT));
+ }
+ else
+ {
+ text_ = make_item ("LyricText", event_->self_scm ());
+ text_->set_property ("text", text);
+ }
}
}
+Context *
+get_voice_to_lyrics (Context *lyrics)
+{
+ SCM avc = lyrics->get_property ("associatedVoiceContext");
+ if (Context *c = unsmob_context (avc))
+ return c;
+
+ SCM voice_name = lyrics->get_property ("associatedVoice");
+ string nm = lyrics->id_string ();
+
+ if (scm_is_string (voice_name))
+ nm = ly_scm2string (voice_name);
+ else
+ {
+ ssize idx = nm.rfind ('-');
+ if (idx != NPOS)
+ nm = nm.substr (0, idx);
+ }
+
+ Context *parent = lyrics;
+ Context *voice = 0;
+ while (parent && !voice)
+ {
+ voice = find_context_below (parent, ly_symbol2scm ("Voice"), nm);
+ parent = parent->get_parent_context ();
+ }
+
+ if (voice)
+ return voice;
+
+ parent = lyrics;
+ voice = 0;
+ while (parent && !voice)
+ {
+ voice = find_context_below (parent, ly_symbol2scm ("Voice"), "");
+ parent = parent->get_parent_context ();
+ }
+
+ return voice;
+}
+
+Grob *
+get_current_note_head (Context *voice)
+{
+ for (SCM s = voice->get_property ("busyGrobs");
+ scm_is_pair (s); s = scm_cdr (s))
+ {
+ Item *g = dynamic_cast<Item *> (unsmob_grob (scm_cdar (s)));
+
+ if (g && !g->get_column ()
+ && Note_head::has_interface (g))
+ return g;
+ }
+
+ return 0;
+}
+
void
-Lyric_engraver::do_post_move_processing()
+Lyric_engraver::stop_translation_timestep ()
{
- lreq_arr_.set_size(0);
+ if (text_)
+ {
+ Context *voice = get_voice_to_lyrics (context ());
+
+ if (voice)
+ {
+ Grob *head = get_current_note_head (voice);
+
+ if (head)
+ {
+ text_->set_parent (head, X_AXIS);
+ if (melisma_busy (voice))
+ text_->set_property ("self-alignment-X", scm_from_int (LEFT));
+ }
+ }
+
+ last_text_ = text_;
+ text_ = 0;
+ }
+ event_ = 0;
}
+#include "translator.icc"
-IMPLEMENT_STATIC_NAME(Lyric_engraver);
-IMPLEMENT_IS_TYPE_B1(Lyric_engraver,Engraver);
-ADD_THIS_ENGRAVER(Lyric_engraver);
+ADD_TRANSLATOR (Lyric_engraver,
+ /* doc */ "",
+ /* create */ "LyricText",
+ /* accept */ "lyric-event",
+ /* read */ "",
+ /* write */ "");