source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.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 "engraver.hh"
+#include "event.hh"
+#include "item.hh"
+#include "context.hh"
+#include "font-metric.hh"
+#include "note-head.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:
+ virtual void stop_translation_timestep ();
+ virtual bool try_music (Music *);
+ virtual void process_music ();
+
+public:
+ TRANSLATOR_DECLARATIONS (Lyric_engraver);
+private:
+ Music * event_;
+ Item* text_;
+
+ Context* get_voice_context ();
+};
+
+Lyric_engraver::Lyric_engraver ()
+{
+ 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_)
+ return false;
+ event_ =r;
+ return true;
}
void
-Lyric_engraver::do_process_requests()
+Lyric_engraver::process_music ()
+{
+ if (event_)
+ {
+ text_= make_item ("LyricText",event_->self_scm ());
+
+ text_->set_property ("text", event_->get_property ("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
+ {
+ int idx = nm.index_last ('-');
+ if (idx >= 0)
+ nm = nm.left_string (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)
{
- 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);
+ for (SCM s = voice->get_property ("busyGrobs");
+ ly_c_pair_p (s); s = ly_cdr (s))
+ {
+ Item*g = dynamic_cast<Item*> (unsmob_grob (ly_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_int2num (LEFT));
+ }
+ }
+
+ text_ =0;
+ }
+ event_ =0;
}
-IMPLEMENT_STATIC_NAME(Lyric_engraver);
-IMPLEMENT_IS_TYPE_B1(Lyric_engraver,Engraver);
-ADD_THIS_ENGRAVER(Lyric_engraver);
+ENTER_DESCRIPTION (Lyric_engraver,
+/* descr */ "",
+/* creats*/ "LyricText",
+/* accepts */ "lyric-event",
+/* acks */ "",
+/* reads */ "",
+/* write */ "");