* lily/*.cc, lily/include/*.hh: eliminate dummy arguments from

[lilypond.git] / lily / lyric-engraver.cc

diff --git a/lily/lyric-engraver.cc b/lily/lyric-engraver.cc
index 20cf201bdcd04126e63b0d2f0a6c60d5ff85c589..75556716ec83cd3057ec78af55d873c656fff4f0 100644 (file)
--- a/lily/lyric-engraver.cc
+++ b/lily/lyric-engraver.cc
@@ -3,54 +3,55 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
   Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
-#include "engraver.hh"
-#include "event.hh"
-#include "item.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"
+#include "stream-event.hh"
+
+#include "translator.icc"
 
 /**
-   Generate texts for lyric syllables.  We only do one lyric at a time.  
+   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 
+*/
+class Lyric_engraver : public Engraver
 {
 protected:
-  virtual void stop_translation_timestep ();
-  virtual bool try_music (Music *);
-  virtual void process_music ();
-  
+  void stop_translation_timestep ();
+  void process_music ();
+  DECLARE_TRANSLATOR_LISTENER (lyric);
+
 public:
-  TRANSLATOR_DECLARATIONS(Lyric_engraver);
+  TRANSLATOR_DECLARATIONS (Lyric_engraver);
+
 private:
-  Music * event_;
-  Item* text_;
+  Stream_event *event_;
+  Item *text_;
+  Item *last_text_;
 
-  Context* get_voice_context ();
+  Context *get_voice_context ();
 };
 
 Lyric_engraver::Lyric_engraver ()
 {
-  text_ =0;
-  event_ =0;
+  text_ = 0;
+  last_text_ = 0;
+  event_ = 0;
 }
 
-bool
-Lyric_engraver::try_music (Music*r)
+IMPLEMENT_TRANSLATOR_LISTENER (Lyric_engraver, lyric);
+void
+Lyric_engraver::listen_lyric (Stream_event *ev)
 {
-  if (r->is_mus_type ("lyric-event"))
-    {
-      if (event_)
-       return false;
-      event_ =r;
-      return true;
-    }
-  return false;
+  ASSIGN_EVENT_ONCE (event_, ev);
 }
 
 void
@@ -58,55 +59,75 @@ Lyric_engraver::process_music ()
 {
   if (event_)
     {
-      text_=  make_item ("LyricText");
-      
-      text_->set_property ("text", event_->get_property ("text"));
-      announce_grob (text_, event_->self_scm());
+      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 ());
+       }
     }
 }
 
-
-Context*
+Context *
 get_voice_to_lyrics (Context *lyrics)
 {
   SCM avc = lyrics->get_property ("associatedVoiceContext");
-  if  (Context *c = unsmob_context (avc))
+  if (Context *c = unsmob_context (avc))
     return c;
 
-  SCM voice = lyrics->get_property ("associatedVoice");
-  String nm = lyrics->id_string_;
+  SCM voice_name = lyrics->get_property ("associatedVoice");
+  string nm = lyrics->id_string ();
 
-  if (gh_string_p (voice))
-    nm = ly_scm2string (voice);
+  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);
+      ssize idx = nm.rfind ('-');
+      if (idx != NPOS)
+       nm = nm.substr (0, idx);
     }
 
-  Context *c =  lyrics->find_existing_context (ly_symbol2scm ("Voice"), nm);
+  Context *parent = lyrics;
+  Context *voice = 0;
+  while (parent && !voice)
+    {
+      voice = find_context_below (parent, ly_symbol2scm ("Voice"), nm);
+      parent = parent->get_parent_context ();
+    }
 
-  if (c)
-    return c;
+  if (voice)
+    return voice;
 
-  return lyrics->find_existing_context (ly_symbol2scm ("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)
+get_current_note_head (Context *voice)
 {
   for (SCM s = voice->get_property ("busyGrobs");
-       gh_pair_p (s); s = gh_cdr (s))
+       scm_is_pair (s); s = scm_cdr (s))
     {
-      Item*g = dynamic_cast<Item*> (unsmob_grob (gh_cdar (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;  
+
+  return 0;
 }
 
 void
@@ -114,7 +135,7 @@ Lyric_engraver::stop_translation_timestep ()
 {
   if (text_)
     {
-      Context * voice = get_voice_to_lyrics (daddy_context_);
+      Context *voice = get_voice_to_lyrics (context ());
 
       if (voice)
        {
@@ -124,21 +145,18 @@ Lyric_engraver::stop_translation_timestep ()
            {
              text_->set_parent (head, X_AXIS);
              if (melisma_busy (voice))
-               text_->set_property ("self-alignment-X", gh_int2scm (LEFT)); 
+               text_->set_property ("self-alignment-X", scm_from_int (LEFT));
            }
        }
-      
-      typeset_grob (text_);
-      text_ =0;
+
+      last_text_ = text_;
+      text_ = 0;
     }
-  event_ =0;
+  event_ = 0;
 }
 
-
-ENTER_DESCRIPTION(Lyric_engraver,
-/* descr */       "",
-/* creats*/       "",
-/* accepts */     "lyric-event",
-/* acks  */      "",
-/* reads */       "",
-/* write */       "");
+ADD_TRANSLATOR (Lyric_engraver,
+               /* doc */ "",
+               /* create */ "LyricText",
+               /* read */ "",
+               /* write */ "");