Run grand-replace for 2010.

[lilypond.git] / lily / context-def.cc

diff --git a/lily/context-def.cc b/lily/context-def.cc
index 2d7cace9bf9ba3b04b2ebe537529fd6f12a5f387..a68b6f05e53ebe5c0c9a6a326458c68887770d4d 100644 (file)
--- a/lily/context-def.cc
+++ b/lily/context-def.cc
@@ -1,9 +1,20 @@
 /*
-  translator-def.cc -- implement Context_def
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2000--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 2000--2007 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/>.
 */
 
 /* TODO: should junk this class an replace by
@@ -123,14 +134,9 @@ Context_def::add_context_mod (SCM mod)
   if (ly_symbol2scm ("default-child") == tag)
     default_child_ = sym;
   else if (ly_symbol2scm ("consists") == tag
-          || ly_symbol2scm ("consists-end") == tag
           || ly_symbol2scm ("remove") == tag)
     {
-      if (!get_translator (sym))
-       error (_f ("program has no such type: `%s'",
-                  ly_symbol2string (sym).c_str ()));
-      else
-       translator_mods_ = scm_cons (scm_list_2 (tag, sym), translator_mods_);
+      translator_mods_ = scm_cons (scm_list_2 (tag, sym), translator_mods_);
     }
   else if (ly_symbol2scm ("accepts") == tag
           || ly_symbol2scm ("denies") == tag)
@@ -203,10 +209,26 @@ Context_def::get_default_child (SCM user_mod) const
    - the last element in the list defines a context with the given name
 
   The ADDITIONAL_ACCEPTS parameter is a list of additional contexts that this
-  specific output def (but not and of the child output defs) should accept.
+  specific context def (but not any of the child context defs) should accept.
+*/
+vector<Context_def *>
+Context_def::path_to_acceptable_context (SCM type_sym,
+                                        Output_def *odef,
+                                        SCM additional_accepts) const
+{
+  set<const Context_def *> seen;
+  return internal_path_to_acceptable_context (type_sym, odef, additional_accepts, &seen);
+}
+
+/*
+The SEEN parameter is a set which keeps track of visited contexts, allowing
+contexts of the same type to be nested.
 */
 vector<Context_def*>
-Context_def::path_to_acceptable_context (SCM type_sym, Output_def *odef, SCM additional_accepts) const
+Context_def::internal_path_to_acceptable_context (SCM type_sym,
+                                                 Output_def *odef,
+                                                 SCM additional_accepts,
+                                                 set<const Context_def *> *seen) const
 {
   assert (scm_is_symbol (type_sym));
 
@@ -230,20 +252,25 @@ Context_def::path_to_acceptable_context (SCM type_sym, Output_def *odef, SCM add
        }
     }
 
+  seen->insert (this);
   vsize best_depth = INT_MAX;
   for (vsize i = 0; i < accepteds.size (); i++)
     {
       Context_def *g = accepteds[i];
 
-      vector<Context_def*> result
-       = g->path_to_acceptable_context (type_sym, odef, SCM_EOL);
-      if (result.size () && result.size () < best_depth)
+      if (!seen->count (g))
        {
-         best_depth = result.size ();
-         result.insert (result.begin (), g);
-         best_result = result;
+         vector<Context_def*> result
+           = g->internal_path_to_acceptable_context (type_sym, odef, SCM_EOL, seen);
+         if (result.size () && result.size () < best_depth)
+           {
+             best_depth = result.size ();
+             result.insert (result.begin (), g);
+             best_result = result;
+           }
        }
     }
+  seen->erase (this);
 
   return best_result;
 }
@@ -265,7 +292,8 @@ Context_def::get_translator_names (SCM user_mod) const
 
       if (ly_symbol2scm ("consists") == tag)
        l1 = scm_cons (arg, l1);
-      else if (ly_symbol2scm ("remove") == tag)
+      else if (ly_symbol2scm ("remove") == tag
+              && get_translator (arg))
        l1 = scm_delete_x (arg, l1);
     }