Protected_scm grob_property_callback_stack = SCM_EOL;
-#ifndef NDEBUG
extern bool debug_property_callbacks;
+#ifndef NDEBUG
static void
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;
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.")
{
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.")
{
cache_callback = (ly_is_procedure (cb)) ? cb : SCM_BOOL_F;
return SCM_UNSPECIFIED;
}
-#endif
void
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)
{