Imported Upstream version 2.16.0

[lilypond.git] / lily / timing-translator.cc

diff --git a/lily/timing-translator.cc b/lily/timing-translator.cc
index d5d069270bbed0b55d1b3b06eb719647315c9323..c6b245ba61b25da7b4a0223bf126d22a069ebdb7 100644 (file)
--- a/lily/timing-translator.cc
+++ b/lily/timing-translator.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1997--2012 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
@@ -35,31 +35,47 @@ Timing_translator::stop_translation_timestep ()
       Moment now = now_mom ();
 
       if (barleft > Moment (0))
-       {
-         Moment nextmom = now + barleft;
-         nextmom.grace_part_ = Rational (0);
-         global->add_moment_to_process (nextmom);
-       }
+        {
+          Moment nextmom = now + barleft;
+          nextmom.grace_part_ = Rational (0);
+          global->add_moment_to_process (nextmom);
+        }
     }
 }
 
 void
 Timing_translator::initialize ()
 {
-  context ()->add_alias (ly_symbol2scm ("Timing"));
-  context ()->set_property ("currentBarNumber", scm_from_int (1));
-  context ()->set_property ("internalBarNumber", scm_from_int (1));
+  Context *timing = unsmob_context (scm_call_2 (ly_lily_module_constant ("ly:context-find"),
+                                                context ()->self_scm (),
+                                                ly_symbol2scm ("Timing")));
+  if (timing != context ())
+    {
+      context ()->add_alias (ly_symbol2scm ("Timing"));
+
+      if (!timing)
+        {
+          programming_error ("Can't find Timing context template");
+          timing = context ();
+        }
+    }
+
+  SCM barnumber = timing->get_property ("currentBarNumber");
+  if (!scm_is_integer (barnumber))
+    barnumber = scm_from_int (1);
+  context ()->set_property ("currentBarNumber", barnumber);
+  context ()->set_property ("internalBarNumber", barnumber);
 
   context ()->set_property ("timeSignatureFraction",
-                           scm_cons (scm_from_int (4), scm_from_int (4)));
+                            timing->get_property ("timeSignatureFraction"));
   /*
     Do not init measurePosition; this should be done from global
     context.
   */
   context ()->set_property ("measureLength",
-                           Moment (Rational (1)).smobbed_copy ());
+                            timing->get_property ("measureLength"));
   context ()->set_property ("baseMoment",
-                           Moment (Rational (1, 4)).smobbed_copy ());
+                            timing->get_property ("baseMoment"));
 }
 
 Rational
@@ -106,7 +122,7 @@ Timing_translator::start_translation_timestep ()
     {
       measposp = now;
       context ()->set_property ("measurePosition",
-                               measposp.smobbed_copy ());
+                                measposp.smobbed_copy ());
     }
 
   measposp += dt;
@@ -121,8 +137,8 @@ Timing_translator::start_translation_timestep ()
   while (c && measposp.main_part_ >= len)
     {
       measposp.main_part_ -= len;
-      current_barnumber ++;
-      internal_barnumber ++;
+      current_barnumber++;
+      internal_barnumber++;
     }
 
   context ()->set_property ("currentBarNumber", scm_from_int (current_barnumber));
@@ -133,27 +149,29 @@ Timing_translator::start_translation_timestep ()
 #include "translator.icc"
 
 ADD_TRANSLATOR (Timing_translator,
-               /* doc */
-               "This engraver adds the alias @code{Timing} to its containing"
-               " context.  Responsible for synchronizing timing information"
-               " from staves.  Normally in @code{Score}.  In order to create"
-               " polyrhythmic music, this engraver should be removed from"
-               " @code{Score} and placed in @code{Staff}.",
-
-               /* create */
-               "",
-
-               /* read */
-               "internalBarNumber "
-               "currentBarNumber "
-               "measureLength "
-               "measurePosition ",
-
-               /* write */
-               "baseMoment "
-               "currentBarNumber "
-               "internalBarNumber "
-               "measureLength "
-               "measurePosition "
-               "timeSignatureFraction "
-               );
+                /* doc */
+                "This engraver adds the alias @code{Timing} to its containing"
+                " context.  Responsible for synchronizing timing information"
+                " from staves.  Normally in @code{Score}.  In order to create"
+                " polyrhythmic music, this engraver should be removed from"
+                " @code{Score} and placed in @code{Staff}.",
+
+                /* create */
+                "",
+
+                /* read */
+                "baseMoment "
+                "currentBarNumber "
+                "internalBarNumber "
+                "measureLength "
+                "measurePosition "
+                "timeSignatureFraction ",
+
+                /* write */
+                "baseMoment "
+                "currentBarNumber "
+                "internalBarNumber "
+                "measureLength "
+                "measurePosition "
+                "timeSignatureFraction "
+               );