* Unify fetaDynamic and fetaNumber into one fetaText encoding

[lilypond.git] / lily / grob-property.cc

diff --git a/lily/grob-property.cc b/lily/grob-property.cc
index 084ea42fbdb60ede609beddcf35b61cf8889f876..55b06d6dfa2f522052b929b881bf2a974d7609c4 100644 (file)
--- a/lily/grob-property.cc
+++ b/lily/grob-property.cc
@@ -19,50 +19,68 @@
 #include "profile.hh"
 #include "simple-closure.hh"
 #include "warn.hh"
+#include "protected-scm.hh"
+
+Protected_scm grob_property_callback_stack = SCM_EOL;
+
+extern bool debug_property_callbacks;
 
 #ifndef NDEBUG
+static void
+print_property_callback_stack ()
+{
+  int frame = 0;
+  for (SCM s = grob_property_callback_stack; scm_is_pair (s); s = scm_cdr (s))
+    message (_f ("%d: %s", frame++, ly_scm_write_string (scm_car (s)).c_str ()));
+}
+#endif
+
 static SCM modification_callback = SCM_EOL;
 static SCM cache_callback = SCM_EOL;
 
+
+/*
+
+FIXME: this should use ly:set-option interface instead.
+
+*/
+
 LY_DEFINE (ly_set_grob_modification_callback, "ly:set-grob-modification-callback",
           1, 0, 0, (SCM cb),
-          "Specify a procedure that will be called every time lilypond modifies "
-          "a grob property. The callback will receive as arguments "
-          "the grob that is being modified, "
-          "the name of the C++ file in which the modification was requested, "
-          "the line number in the C++ file in which the modification was requested, "
-          "the name of the function in which the modification was requested, "
-          "the property to be changed and "
-          "the new value for the property.")
+          "Specify a procedure that will be called every time LilyPond"
+          " modifies a grob property.  The callback will receive as"
+          " arguments the grob that is being modified, the name of the"
+          " C++ file in which the modification was requested, the line"
+          " number in the C++ file in which the modification was requested,"
+          " the name of the function in which the modification was"
+          " requested, the property to be changed, and the new value for"
+          " the property.")
 {
-  LY_ASSERT_TYPE (ly_is_procedure, cb, 1);
-
-  modification_callback = cb;
+  modification_callback =  (ly_is_procedure (cb)) ? cb : SCM_BOOL_F;
   return SCM_UNSPECIFIED;
 }
 
 LY_DEFINE (ly_set_property_cache_callback, "ly:set-property-cache-callback",
           1, 0, 0, (SCM cb),
-          "Specify a procedure that will be called whenever lilypond calculates "
-          "a callback function and caches the result. The callback will "
-          "receive as arguments "
-          "the grob whose property it is, "
-          "the name of the property, "
-          "the name of the callback that calculated the property and "
-          "the new (cached) value of the property.")
+          "Specify a procedure that will be called whenever lilypond"
+          " calculates a callback function and caches the result.  The"
+          " callback will receive as arguments the grob whose property it"
+          " is, the name of the property, the name of the callback that"
+          " calculated the property, and the new (cached) value of the"
+          " property.")
 {
-  LY_ASSERT_TYPE (ly_is_procedure, cb, 1);
-  
-  cache_callback = cb;
+  cache_callback =  (ly_is_procedure (cb)) ? cb : SCM_BOOL_F;
   return SCM_UNSPECIFIED;
 }
 
+
 void
 Grob::instrumented_set_property (SCM sym, SCM v,
                                 char const *file,
                                 int line,
                                 char const *fun)
 {
+#ifndef NDEBUG
   if (ly_is_procedure (modification_callback))
     scm_apply_0 (modification_callback,
                 scm_list_n (self_scm (),
@@ -70,9 +88,14 @@ Grob::instrumented_set_property (SCM sym, SCM v,
                             scm_from_int (line),
                             scm_from_locale_string (fun),
                             sym, v, SCM_UNDEFINED));
+#else
+  (void) file;
+  (void) line;
+  (void) fun;
+#endif
+  
   internal_set_property (sym, v);
 }
-#endif
 
 SCM
 Grob::get_property_alist_chain (SCM def) const
@@ -146,9 +169,16 @@ Grob::internal_get_property (SCM sym) const
 
 #ifndef NDEBUG
   if (val == ly_symbol2scm ("calculation-in-progress"))
-    programming_error (_f ("cyclic dependency: calculation-in-progress encountered for #'%s (%s)",
-                          ly_symbol2string (sym).c_str (),
-                          name ().c_str ()));
+    {
+      programming_error (_f ("cyclic dependency: calculation-in-progress encountered for #'%s (%s)",
+                            ly_symbol2string (sym).c_str (),
+                            name ().c_str ()));
+      if (debug_property_callbacks)
+       {
+         message ("backtrace: ");
+         print_property_callback_stack ();
+       }
+    }
 #endif
   
   if (ly_is_procedure (val)
@@ -161,13 +191,6 @@ Grob::internal_get_property (SCM sym) const
   return val;
 }
 
-#ifndef NDEBUG
-#include "protected-scm.hh"
-
-Protected_scm grob_property_callback_stack = SCM_EOL;
-bool debug_property_callbacks = 0;
-#endif
-
 SCM
 Grob::try_callback_on_alist (SCM *alist, SCM sym, SCM proc)
 {      
@@ -180,7 +203,7 @@ Grob::try_callback_on_alist (SCM *alist, SCM sym, SCM proc)
 
 #ifndef NDEBUG
   if (debug_property_callbacks)
-    grob_property_callback_stack = scm_acons (sym, proc, grob_property_callback_stack);
+    grob_property_callback_stack = scm_cons (scm_list_3 (self_scm (), sym, proc), grob_property_callback_stack);
 #endif
 
   SCM value = SCM_EOL;