Web-ja: update introduction

[lilypond.git] / lily / volta-repeat-iterator.cc

diff --git a/lily/volta-repeat-iterator.cc b/lily/volta-repeat-iterator.cc
index 91bf94e42a0323a4e8d7049f4f2b3fb1a8019b47..8f9dca3b0b9451043c893f7e9203ce4d8bf442b7 100644 (file)
--- a/lily/volta-repeat-iterator.cc
+++ b/lily/volta-repeat-iterator.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 2002--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 2002--2015 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
@@ -20,6 +20,7 @@
 #include "music.hh"
 #include "sequential-iterator.hh"
 #include "context.hh"
+#include "lily-imports.hh"
 
 class Volta_repeat_iterator : public Sequential_iterator
 {
@@ -33,24 +34,34 @@ protected:
   virtual void next_element (bool);
   virtual void construct_children ();
   virtual void process (Moment);
+  virtual void derived_mark () const;
 
   bool first_time_;
   int alt_count_;
   int rep_count_;
   int done_count_;
+  SCM alt_restores_;
 };
 
 Volta_repeat_iterator::Volta_repeat_iterator ()
 {
   done_count_ = alt_count_ = rep_count_ = 0;
   first_time_ = true;
+  alt_restores_ = SCM_EOL;
+}
+
+void
+Volta_repeat_iterator::derived_mark () const
+{
+  scm_gc_mark (alt_restores_);
+  Sequential_iterator::derived_mark ();
 }
 
 SCM
 Volta_repeat_iterator::get_music_list ()const
 {
   return scm_cons (get_music ()->get_property ("element"),
-                   get_music ()->get_property ("elements"));
+                   Sequential_iterator::get_music_list ());
 }
 
 void
@@ -60,7 +71,7 @@ Volta_repeat_iterator::construct_children ()
 
   SCM alts = get_music ()->get_property ("elements");
 
-  alt_count_ = scm_ilength (alts);
+  alt_count_ = int (scm_ilength (alts));
   rep_count_ = scm_to_int (get_music ()->get_property ("repeat-count"));
   done_count_ = 0;
 }
@@ -75,8 +86,7 @@ Volta_repeat_iterator::add_repeat_command (SCM what)
   SCM current_reps = SCM_EOL;
   Context *where = get_outlet ()->where_defined (reps, &current_reps);
 
-  if (where
-      && (current_reps == SCM_EOL || scm_is_pair (current_reps)))
+  if (where && ly_cheap_is_list (current_reps))
     {
       current_reps = scm_cons (what, current_reps);
       where->set_property (reps, current_reps);
@@ -94,21 +104,70 @@ Volta_repeat_iterator::next_element (bool side_effect)
     {
       if (alt_count_)
         {
-          string repstr = to_string (rep_count_ - alt_count_ + done_count_) + ".";
-          if (done_count_ > 1)
+          string repstr = ::to_string (rep_count_ - alt_count_ + done_count_) + ".";
+          if (done_count_ <= 1)
             {
-              add_repeat_command (scm_list_n (ly_symbol2scm ("volta"), SCM_BOOL_F, SCM_UNDEFINED));
+              alt_restores_ = SCM_EOL;
+              if (to_boolean (get_outlet ()->get_property ("timing")))
+                {
+                  for (SCM lst = get_outlet ()->get_property ("alternativeRestores");
+                       scm_is_pair (lst);
+                       lst = scm_cdr (lst))
+                    {
+                      SCM res = SCM_EOL;
+                      Context *t = get_outlet ()->where_defined (scm_car (lst),
+                                                                 &res);
+                      if (t)
+                        {
+                          alt_restores_ = scm_cons
+                            (scm_list_3 (t->self_scm (), scm_car (lst), res),
+                             alt_restores_);
+                        }
+                    }
+                }
+            }
+          else
+            {
+
+              add_repeat_command (scm_list_2 (ly_symbol2scm ("volta"), SCM_BOOL_F));
 
               if (done_count_ - 1 < alt_count_)
-                add_repeat_command (ly_symbol2scm ("end-repeat"));
+                {
+                  add_repeat_command (ly_symbol2scm ("end-repeat"));
+
+                  if (to_boolean (get_outlet ()->get_property ("timing")))
+                    {
+                      SCM mps = ly_symbol2scm ("measurePosition");
+                      for (SCM p = alt_restores_; scm_is_pair (p); p = scm_cdr (p))
+                        {
+                          SCM ls = scm_car (p);
+                          if (scm_is_eq (scm_cadr (ls), mps))
+                            // Repeats may have different grace timing, so
+                            // we need to adjust the measurePosition grace
+                            // timing to that of the current alternative
+                            // rather than that of the first.  The
+                            // Timing_translator does this already but is
+                            // too late to avoid bad side-effects
+                            {
+                              Moment mp (unsmob<Moment> (scm_caddr (ls))->main_part_,
+                                         get_outlet ()->now_mom ().grace_part_);
+                              Lily::ly_context_set_property_x (scm_car (ls),
+                                                               mps,
+                                                               mp.smobbed_copy ());
+                            }
+                          else
+                            scm_apply_0 (Lily::ly_context_set_property_x, ls);
+                        }
+                    }
+                }
             }
 
           if (done_count_ == 1 && alt_count_ < rep_count_)
-            repstr = "1.--" + to_string (rep_count_ - alt_count_ + done_count_) + ".";
+            repstr = "1.--" + ::to_string (rep_count_ - alt_count_ + done_count_) + ".";
 
           if (done_count_ <= alt_count_)
-            add_repeat_command (scm_list_n (ly_symbol2scm ("volta"),
-                                            ly_string2scm (repstr), SCM_UNDEFINED));
+            add_repeat_command (scm_list_2 (ly_symbol2scm ("volta"),
+                                            ly_string2scm (repstr)));
         }
       else
         add_repeat_command (ly_symbol2scm ("end-repeat"));