Web-ja: update introduction

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

diff --git a/lily/lyric-engraver.cc b/lily/lyric-engraver.cc
index 6dce40a464ba7b385f0149dd254debd7de9b6ecd..bad1203266f75b43842e6bdea358b6a734dc339f 100644 (file)
--- a/lily/lyric-engraver.cc
+++ b/lily/lyric-engraver.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
   Jan Nieuwenhuizen <janneke@gnu.org>
 
   LilyPond is free software: you can redistribute it and/or modify
@@ -36,7 +36,7 @@ class Lyric_engraver : public Engraver
 protected:
   void stop_translation_timestep ();
   void process_music ();
-  DECLARE_TRANSLATOR_LISTENER (lyric);
+  void listen_lyric (Stream_event *);
 
 public:
   TRANSLATOR_DECLARATIONS (Lyric_engraver);
@@ -49,14 +49,14 @@ private:
   Context *get_voice_context ();
 };
 
-Lyric_engraver::Lyric_engraver ()
+Lyric_engraver::Lyric_engraver (Context *c)
+  : Engraver (c)
 {
   text_ = 0;
   last_text_ = 0;
   event_ = 0;
 }
 
-IMPLEMENT_TRANSLATOR_LISTENER (Lyric_engraver, lyric);
 void
 Lyric_engraver::listen_lyric (Stream_event *ev)
 {
@@ -70,7 +70,7 @@ Lyric_engraver::process_music ()
     {
       SCM text = event_->get_property ("text");
 
-      if (ly_is_equal (text, scm_from_locale_string (" ")))
+      if (ly_is_equal (text, scm_from_ascii_string (" ")))
         {
           if (last_text_)
             last_text_->set_property ("self-alignment-X",
@@ -95,8 +95,11 @@ get_voice_to_lyrics (Context *lyrics)
   bool searchForVoice = to_boolean (lyrics->get_property ("searchForVoice"));
 
   SCM avc = lyrics->get_property ("associatedVoiceContext");
-  if (Context *c = unsmob_context (avc))
-    return c;
+  if (Context *c = unsmob<Context> (avc))
+    {
+      if (!c->is_removable ())
+        return c;
+    }
 
   SCM voice_name = lyrics->get_property ("associatedVoice");
   string nm = lyrics->id_string ();
@@ -112,47 +115,50 @@ get_voice_to_lyrics (Context *lyrics)
         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 ();
-    }
+  SCM voice_type = lyrics->get_property ("associatedVoiceType");
+  if (!scm_is_symbol (voice_type))
+    return 0;
 
+  Context *voice = find_context_near (lyrics, voice_type, nm);
   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;
+  return find_context_near (lyrics, voice_type, "");
 }
 
 Grob *
-get_current_note_head (Context *voice, bool include_grace_notes)
+get_current_note_head (Context *voice)
 {
   Moment now = voice->now_mom ();
   for (SCM s = voice->get_property ("busyGrobs");
        scm_is_pair (s); s = scm_cdr (s))
     {
-      Grob *g = unsmob_grob (scm_cdar (s));;
-      Moment *end_mom = unsmob_moment (scm_caar (s));
+      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_)
-           || (include_grace_notes && end_mom->grace_part_ > now.grace_part_))
+      // It's a bit irritating that we just have the length and
+      // duration of the Grob.
+      Moment end_from_now =
+        get_event_length (unsmob<Stream_event> (g->get_property ("cause")), now)
+        + now;
+      // We cannot actually include more than a single grace note
+      // using busyGrobs on ungraced lyrics since a grob ending on
+      // grace time will just have disappeared from busyGrobs by the
+      // time our ungraced lyrics appear.  At best we may catch a
+      // single grace note.
+      //
+      // However, a single grace note ending on a non-grace time is
+      // indistinguishable from a proper note ending on a non-grace
+      // time.  So we really have no way to obey includeGraceNotes
+      // here.  Not with this mechanism.
+      if ((*end_mom == end_from_now)
           && dynamic_cast<Item *> (g)
-          && Note_head::has_interface (g))
+          && has_interface<Note_head> (g))
         {
           return g;
         }
@@ -170,23 +176,16 @@ Lyric_engraver::stop_translation_timestep ()
 
       if (voice)
         {
-          bool include_grace_notes = to_boolean (get_property ("includeGraceNotes"));
-          Grob *head = get_current_note_head (voice, include_grace_notes);
+          Grob *head = get_current_note_head (voice);
 
           if (head)
             {
-              text_->set_parent (head, X_AXIS);
+              text_->set_parent (head->get_parent(X_AXIS), X_AXIS);
               if (melisma_busy (voice)
                   && !to_boolean (get_property ("ignoreMelismata")))
                 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));
-            }
         }
 
       last_text_ = text_;
@@ -195,6 +194,12 @@ Lyric_engraver::stop_translation_timestep ()
   event_ = 0;
 }
 
+void
+Lyric_engraver::boot ()
+{
+  ADD_LISTENER (Lyric_engraver, lyric);
+}
+
 ADD_TRANSLATOR (Lyric_engraver,
                 /* doc */
                 "Engrave text for lyrics.",
@@ -204,7 +209,6 @@ ADD_TRANSLATOR (Lyric_engraver,
 
                 /* read */
                 "ignoreMelismata "
-                "includeGraceNotes "
                 "lyricMelismaAlignment "
                 "searchForVoice",