Web-ja: update introduction

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

diff --git a/lily/volta-engraver.cc b/lily/volta-engraver.cc
index bd8e9e2c39645bf6af5aaa7774b73eeb44521d5d..8d6a16f1ee6f4d8d3f8f953ef4119103db988b05 100644 (file)
--- a/lily/volta-engraver.cc
+++ b/lily/volta-engraver.cc
@@ -1,15 +1,25 @@
 /*
-  volta-engraver.cc -- implement Volta_engraver
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2000--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 2000--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  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 "engraver.hh"
 
 #include "axis-group-interface.hh"
-#include "bar-line.hh"
 #include "context.hh"
 #include "grob-array.hh"
 #include "international.hh"
@@ -33,7 +43,7 @@ public:
   TRANSLATOR_DECLARATIONS (Volta_engraver);
 protected:
 
-  DECLARE_ACKNOWLEDGER (bar_line);
+  void acknowledge_bar_line (Grob_info);
 
   virtual void derived_mark () const;
   void stop_translation_timestep ();
@@ -52,7 +62,8 @@ Volta_engraver::derived_mark () const
   scm_gc_mark (start_string_);
 }
 
-Volta_engraver::Volta_engraver ()
+Volta_engraver::Volta_engraver (Context *c)
+  : Engraver (c)
 {
   start_string_ = SCM_EOL;
   volta_bracket_ = 0;
@@ -72,14 +83,14 @@ Volta_engraver::process_music ()
       SCM c = scm_car (cs);
 
       if (scm_is_pair (c)
-         && scm_car (c) == ly_symbol2scm ("volta")
-         && scm_is_pair (scm_cdr (c)))
-       {
-         if (scm_cadr (c) == SCM_BOOL_F)
-           end = true;
-         else
-           start_string_ = scm_cadr (c);
-       }
+          && scm_is_eq (scm_car (c), ly_symbol2scm ("volta"))
+          && scm_is_pair (scm_cdr (c)))
+        {
+          if (scm_is_false (scm_cadr (c)))
+            end = true;
+          else
+            start_string_ = scm_cadr (c);
+        }
 
       cs = scm_cdr (cs);
     }
@@ -89,8 +100,8 @@ Volta_engraver::process_music ()
       SCM l (get_property ("voltaSpannerDuration"));
       Moment now = now_mom ();
 
-      bool early_stop = unsmob_moment (l)
-       && *unsmob_moment (l) <= now - started_mom_;
+      bool early_stop = unsmob<Moment> (l)
+                        && *unsmob<Moment> (l) <= now - started_mom_;
 
       end = end || early_stop;
     }
@@ -110,11 +121,11 @@ Volta_engraver::process_music ()
       warning (_ ("already have a volta spanner, ending that one prematurely"));
 
       if (end_volta_bracket_)
-       {
-         warning (_ ("also already have an ended spanner"));
-         warning (_ ("giving up"));
-         return;
-       }
+        {
+          warning (_ ("also already have an ended spanner"));
+          warning (_ ("giving up"));
+          return;
+        }
 
       end_volta_bracket_ = volta_bracket_;
       volta_bracket_ = 0;
@@ -130,7 +141,7 @@ Volta_engraver::process_music ()
       volta_bracket_->set_property ("text", start_string_);
 
       if (!volta_spanner_)
-       volta_spanner_ = make_spanner ("VoltaBracketSpanner", SCM_EOL);
+        volta_spanner_ = make_spanner ("VoltaBracketSpanner", SCM_EOL);
 
       Axis_group_interface::add_element (volta_spanner_, volta_bracket_);
     }
@@ -151,7 +162,7 @@ Volta_engraver::acknowledge_bar_line (Grob_info i)
 void
 Volta_engraver::stop_translation_timestep ()
 {
-  Grob *cc = unsmob_grob (get_property ("currentCommandColumn"));
+  Grob *cc = unsmob<Grob> (get_property ("currentCommandColumn"));
   Item *ci = dynamic_cast<Item *> (cc);
 
   if (end_volta_bracket_ && !end_volta_bracket_->get_bound (RIGHT))
@@ -163,7 +174,7 @@ Volta_engraver::stop_translation_timestep ()
   if (end_volta_bracket_ && !volta_bracket_)
     {
       for (SCM s = get_property ("stavesFound"); scm_is_pair (s); s = scm_cdr (s))
-       Side_position_interface::add_support (volta_spanner_, unsmob_grob (scm_car (s)));
+        Side_position_interface::add_support (volta_spanner_, unsmob<Grob> (scm_car (s)));
       volta_spanner_ = 0;
     }
 
@@ -179,20 +190,25 @@ Volta_engraver::stop_translation_timestep ()
 /*
   TODO: should attach volta to paper-column if no bar is found.
 */
-ADD_ACKNOWLEDGER (Volta_engraver, bar_line);
+void
+Volta_engraver::boot ()
+{
+  ADD_ACKNOWLEDGER (Volta_engraver, bar_line);
+}
+
 ADD_TRANSLATOR (Volta_engraver,
-               /* doc */
-               "Make volta brackets.",
+                /* doc */
+                "Make volta brackets.",
 
-               /* create */
-               "VoltaBracket "
-               "VoltaBracketSpanner ",
+                /* create */
+                "VoltaBracket "
+                "VoltaBracketSpanner ",
 
-               /* read */
-               "repeatCommands "
-               "voltaSpannerDuration "
-               "stavesFound ",
+                /* read */
+                "repeatCommands "
+                "voltaSpannerDuration "
+                "stavesFound ",
 
-               /* write */
-               ""
-               );
+                /* write */
+                ""
+               );