Web-ja: update introduction

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

diff --git a/lily/bar-engraver.cc b/lily/bar-engraver.cc
index 3d751ecf1282ef88d750761a2f71ddcc5424a55d..fb39ae4955c5f301f141bc32b527362cfa74b759 100644 (file)
--- a/lily/bar-engraver.cc
+++ b/lily/bar-engraver.cc
@@ -1,13 +1,23 @@
 /*
-  bar-engraver.cc -- implement Bar_engraver
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
-
-  (c) 1997--2008 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
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "bar-line.hh"
 #include "context.hh"
 #include "score-engraver.hh"
 #include "warn.hh"
@@ -23,22 +33,22 @@ class Bar_engraver : public Engraver
 {
 public:
   TRANSLATOR_DECLARATIONS (Bar_engraver);
-  void request_bar (string type_string);
 
 protected:
   void stop_translation_timestep ();
   void process_acknowledged ();
 
-  DECLARE_END_ACKNOWLEDGER (spanner);
+  void acknowledge_end_spanner (Grob_info);
 
 private:
   void create_bar ();
 
   Item *bar_;
-  vector<Spanner*> spanners_;
+  vector<Spanner *> spanners_;
 };
 
-Bar_engraver::Bar_engraver ()
+Bar_engraver::Bar_engraver (Context *c)
+  : Engraver (c)
 {
   bar_ = 0;
 }
@@ -50,8 +60,8 @@ Bar_engraver::create_bar ()
     {
       bar_ = make_item ("BarLine", SCM_EOL);
       SCM gl = get_property ("whichBar");
-      if (scm_equal_p (gl, bar_->get_property ("glyph")) != SCM_BOOL_T)
-       bar_->set_property ("glyph", gl);
+      if (!ly_is_equal (gl, bar_->get_property ("glyph")))
+        bar_->set_property ("glyph", gl);
     }
 }
 
@@ -96,23 +106,30 @@ Bar_engraver::acknowledge_end_spanner (Grob_info gi)
   Grob *g = gi.grob ();
 
   if (to_boolean (g->get_property ("to-barline")))
-    spanners_.push_back (dynamic_cast<Spanner*> (g));
+    spanners_.push_back (dynamic_cast<Spanner *> (g));
 }
 
-ADD_END_ACKNOWLEDGER (Bar_engraver, spanner);
-
-ADD_TRANSLATOR (Bar_engraver,
-               /* doc */
-               "Create barlines.  This engraver is controlled through the"
-               " @code{whichBar} property.  If it has no bar line to create,"
-               " it will forbid a linebreak at this point.",
 
-               /* create */
-               "BarLine ",
-
-               /* read */
-               "whichBar ",
+void
+Bar_engraver::boot ()
+{
+  ADD_END_ACKNOWLEDGER (Bar_engraver, spanner);
+}
 
-               /* write */
-               "forbidBreak "
-               );
+ADD_TRANSLATOR (Bar_engraver,
+                /* doc */
+                "Create barlines.  This engraver is controlled through the"
+                " @code{whichBar} property.  If it has no bar line to create,"
+                " it will forbid a linebreak at this point.  This engraver"
+                " is required to trigger the creation of clefs at the start"
+                " of systems.",
+
+                /* create */
+                "BarLine ",
+
+                /* read */
+                "whichBar ",
+
+                /* write */
+                "forbidBreak "
+               );