Run `make grand-replace'.

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

diff --git a/lily/lyric-engraver.cc b/lily/lyric-engraver.cc
index d9e68dbf6a2c6a036a58ccf69868f3c18b028698..1c206a81fd9fc9b16b24652f2aa03a98ed1d5d46 100644 (file)
--- a/lily/lyric-engraver.cc
+++ b/lily/lyric-engraver.cc
@@ -3,54 +3,53 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
   Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
+#include "context.hh"
 #include "engraver.hh"
-#include "event.hh"
 #include "item.hh"
-#include "context.hh"
-#include "font-metric.hh"
 #include "note-head.hh"
+#include "stream-event.hh"
+#include "international.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);
+
 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
@@ -58,34 +57,45 @@ Lyric_engraver::process_music ()
 {
   if (event_)
     {
-      text_=  make_item ("LyricText",event_->self_scm ());
-      
-      text_->set_property ("text", event_->get_property ("text"));
+      SCM text = event_->get_property ("text");
+
+      if (ly_is_equal (text, scm_from_locale_string (" ")))
+       {
+         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_name = lyrics->get_property ("associatedVoice");
-  String nm = lyrics->id_string ();
+  string nm = lyrics->id_string ();
 
-  if (ly_c_string_p (voice_name))
+  if (scm_is_string (voice_name))
     nm = ly_scm2string (voice_name);
+  else if (nm == "")
+    {
+      return 0;
+    }
   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 *parent = lyrics;
-  Context *voice = 0; 
+  Context *voice = 0;
   while (parent && !voice)
     {
       voice = find_context_below (parent, ly_symbol2scm ("Voice"), nm);
@@ -96,7 +106,7 @@ get_voice_to_lyrics (Context *lyrics)
     return voice;
 
   parent = lyrics;
-  voice = 0; 
+  voice = 0;
   while (parent && !voice)
     {
       voice = find_context_below (parent, ly_symbol2scm ("Voice"), "");
@@ -107,19 +117,27 @@ get_voice_to_lyrics (Context *lyrics)
 }
 
 Grob *
-get_current_note_head (Context * voice)
+get_current_note_head (Context *voice)
 {
+  Moment now = voice->now_mom ();
   for (SCM s = voice->get_property ("busyGrobs");
-       ly_c_pair_p (s); s = ly_cdr (s))
+       scm_is_pair (s); s = scm_cdr (s))
     {
-      Item*g = dynamic_cast<Item*> (unsmob_grob (ly_cdar (s)));
-         
-      if (g && !g->get_column ()
+      Grob *g = unsmob_grob (scm_cdar (s));;
+      Moment *end_mom = unsmob_moment (scm_caar (s));
+      if (!end_mom || !g)
+       {
+         programming_error ("busyGrobs invalid");
+         continue;
+       }
+      
+      if (end_mom->main_part_ > now.main_part_
+         && dynamic_cast<Item *> (g)
          && Note_head::has_interface (g))
        return g;
     }
-         
-  return 0;  
+
+  return 0;
 }
 
 void
@@ -127,8 +145,8 @@ Lyric_engraver::stop_translation_timestep ()
 {
   if (text_)
     {
-      Context * voice = get_voice_to_lyrics (context ());
-
+      Context *voice = get_voice_to_lyrics (context ());
+ 
       if (voice)
        {
          Grob *head = get_current_note_head (voice);
@@ -137,20 +155,30 @@ Lyric_engraver::stop_translation_timestep ()
            {
              text_->set_parent (head, X_AXIS);
              if (melisma_busy (voice))
-               text_->set_property ("self-alignment-X", scm_int2num (LEFT)); 
+               text_->set_property ("self-alignment-X", get_property("lyricMelismaAlignment"));
+           }
+         else
+           {
+             text_->warning (_ ("Lyric syllable does not have note. Use \\lyricsto or associatedVoice."));
+             text_->set_property ("X-offset", scm_from_int (0));
            }
        }
-      
-      text_ =0;
+
+      last_text_ = text_;
+      text_ = 0;
     }
-  event_ =0;
+  event_ = 0;
 }
 
+ADD_TRANSLATOR (Lyric_engraver,
+               /* doc */
+               "Engrave text for lyrics.",
+
+               /* create */
+               "LyricText ",
+               /* read */
+               "lyricMelismaAlignment ",
 
-ENTER_DESCRIPTION (Lyric_engraver,
-/* descr */       "",
-/* creats*/       "",
-/* accepts */     "lyric-event",
-/* acks  */      "",
-/* reads */       "",
-/* write */       "");
+               /* write */
+               ""
+               );