source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.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 "engraver.hh"
+#include "event.hh"
#include "item.hh"
-#include "paper-def.hh"
-#include "lookup.hh"
-#include "side-position-interface.hh"
+#include "context.hh"
+#include "font-metric.hh"
+#include "note-head.hh"
-ADD_THIS_TRANSLATOR (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()
+Lyric_engraver::Lyric_engraver ()
{
- text_p_ =0;
- req_l_ =0;
+ text_ =0;
+ event_ =0;
}
bool
-Lyric_engraver::do_try_music (Music*r)
+Lyric_engraver::try_music (Music*r)
{
- if (Lyric_req* l = dynamic_cast <Lyric_req *> (r))
+ if (r->is_mus_type ("lyric-event"))
{
- if (req_l_)
+ if (event_)
return false;
- req_l_ =l;
+ event_ =r;
return true;
}
return false;
}
void
-Lyric_engraver::do_process_music()
+Lyric_engraver::process_music ()
{
- if (req_l_)
+ if (event_)
{
- text_p_= new Item (get_property ("basicLyricTextProperties"));
-
- text_p_->set_elt_property ("text",
-// ly_str02scm ((req_l_->text_str_ + " ").ch_C ()));
- ly_str02scm ((req_l_->text_str_).ch_C ()));
-
- text_p_->add_offset_callback (&Side_position::aligned_on_self,X_AXIS);
- /*
- We can't reach the notehead where we're centered from here. So
- we kludge.
- */
- text_p_->translate_axis (paper_l()->get_var ("quartwidth")/2, X_AXIS);
+ text_= make_item ("LyricText");
- announce_element (text_p_, req_l_);
+ text_->set_property ("text", event_->get_property ("text"));
+ announce_grob (text_, event_->self_scm ());
}
}
-void
-Lyric_engraver::do_pre_move_processing()
+
+Context*
+get_voice_to_lyrics (Context *lyrics)
{
- if (text_p_)
+ SCM avc = lyrics->get_property ("associatedVoiceContext");
+ if (Context *c = unsmob_context (avc))
+ return c;
+
+ SCM voice = lyrics->get_property ("associatedVoice");
+ String nm = lyrics->id_string_;
+
+ if (gh_string_p (voice))
+ nm = ly_scm2string (voice);
+ else
{
- typeset_element (text_p_);
- text_p_ =0;
+ int idx = nm.index_last ('-');
+ if (idx >= 0)
+ nm = nm.left_string (idx);
}
+
+ Context *c = lyrics->find_context_below (ly_symbol2scm ("Voice"), nm);
+
+ if (c)
+ return c;
+
+ return lyrics->find_context_below (ly_symbol2scm ("Voice"), "");
+}
+
+Grob *
+get_current_note_head (Context * voice)
+{
+ for (SCM s = voice->get_property ("busyGrobs");
+ gh_pair_p (s); s = gh_cdr (s))
+ {
+ Item*g = dynamic_cast<Item*> (unsmob_grob (gh_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 ()
{
- req_l_ =0;
+ if (text_)
+ {
+ Context * voice = get_voice_to_lyrics (daddy_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", gh_int2scm (LEFT));
+ }
+ }
+
+ typeset_grob (text_);
+ text_ =0;
+ }
+ event_ =0;
}
+ENTER_DESCRIPTION (Lyric_engraver,
+/* descr */ "",
+/* creats*/ "",
+/* accepts */ "lyric-event",
+/* acks */ "",
+/* reads */ "",
+/* write */ "");