Imported Upstream version 2.14.2

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

diff --git a/lily/grob-property.cc b/lily/grob-property.cc
index d7f29aed3db1e29b7d9ade31f27ed6178dad5f64..f174f7ee01f6128bd79c6c6d405c80998e862659 100644 (file)
--- a/lily/grob-property.cc
+++ b/lily/grob-property.cc
@@ -23,9 +23,9 @@
 
 Protected_scm grob_property_callback_stack = SCM_EOL;
 
-#ifndef NDEBUG
 extern bool debug_property_callbacks;
 
+#ifndef NDEBUG
 static void
 print_property_callback_stack ()
 {
@@ -33,44 +33,46 @@ print_property_callback_stack ()
   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;
 }
-#endif
+
 
 void
 Grob::instrumented_set_property (SCM sym, SCM v,
@@ -86,6 +88,10 @@ 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);
@@ -185,6 +191,26 @@ Grob::internal_get_property (SCM sym) const
   return val;
 }
 
+/* Unlike internal_get_property, this function does no caching. Use it, therefore, with caution. */
+SCM
+Grob::internal_get_pure_property (SCM sym, int start, int end) const
+{
+  SCM val = internal_get_property_data (sym);
+  if (ly_is_procedure (val))
+    return call_pure_function (val, scm_list_1 (self_scm ()), start, end);
+  if (is_simple_closure (val))
+    return evaluate_with_simple_closure (self_scm (),
+                                        simple_closure_expression (val),
+                                        true, start, end);
+  return val;
+}
+
+SCM
+Grob::internal_get_maybe_pure_property (SCM sym, bool pure, int start, int end) const
+{
+  return pure ? internal_get_pure_property (sym, start, end) : internal_get_property (sym);
+}
+
 SCM
 Grob::try_callback_on_alist (SCM *alist, SCM sym, SCM proc)
 {