*/
#include <cstring>
-#include <math.h>
#include "main.hh"
-#include "input-smob.hh"
+#include "input.hh"
#include "pointer-group-interface.hh"
#include "misc.hh"
#include "paper-score.hh"
#include "output-def.hh"
#include "spanner.hh"
+#include "international.hh"
#include "item.hh"
#include "misc.hh"
#include "item.hh"
#include "program-option.hh"
#include "profile.hh"
+#include "simple-closure.hh"
+#include "warn.hh"
+#include "protected-scm.hh"
-SCM
-Grob::get_property_alist_chain (SCM def) const
+Protected_scm grob_property_callback_stack = SCM_EOL;
+
+extern bool debug_property_callbacks;
+
+#ifndef NDEBUG
+static void
+print_property_callback_stack ()
{
- return scm_list_n (mutable_property_alist_,
- immutable_property_alist_,
- def,
- SCM_UNDEFINED);
+ 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;
+
/*
- This special add_thing routine is slightly more efficient than
- set_prop (name, cons (thing, get_prop (name)))
+FIXME: this should use ly:set-option interface instead.
- since it can reuse the handle returned by scm_assq ().
*/
-// JUNKME.
+
+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.")
+{
+ 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.")
+{
+ cache_callback = (ly_is_procedure (cb)) ? cb : SCM_BOOL_F;
+ return SCM_UNSPECIFIED;
+}
+
+
void
-Grob::add_to_list_property (SCM sym, SCM thing)
+Grob::instrumented_set_property (SCM sym, SCM v,
+ char const *file,
+ int line,
+ char const *fun)
{
- SCM handle
- = scm_sloppy_assq (sym, mutable_property_alist_);
+#ifndef NDEBUG
+ if (ly_is_procedure (modification_callback))
+ scm_apply_0 (modification_callback,
+ scm_list_n (self_scm (),
+ scm_from_locale_string (file),
+ 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);
+}
- if (handle != SCM_BOOL_F)
- scm_set_cdr_x (handle, scm_cons (thing, scm_cdr (handle)));
- else
- {
- /*
- There is no mutable prop yet, so create an entry, and put it in front of the
- mutable prop list.
- */
- handle = scm_sloppy_assq (sym, immutable_property_alist_);
- SCM tail = (handle != SCM_BOOL_F) ? scm_cdr (handle) : SCM_EOL;
- SCM val = scm_cons (thing, tail);
-
- mutable_property_alist_ = scm_cons (scm_cons (sym, val),
- mutable_property_alist_);
- }
+SCM
+Grob::get_property_alist_chain (SCM def) const
+{
+ return scm_list_n (mutable_property_alist_,
+ immutable_property_alist_,
+ def,
+ SCM_UNDEFINED);
}
extern void check_interfaces_for_property (Grob const *me, SCM sym);
void
Grob::internal_set_property (SCM sym, SCM v)
{
-#ifndef NDEBUG
- SCM grob_p = ly_lily_module_constant ("ly:grob?");
- SCM grob_list_p = ly_lily_module_constant ("grob-list?");
- SCM type = scm_object_property (sym, ly_symbol2scm ("backend-type?"));
+ internal_set_value_on_alist (&mutable_property_alist_,
+ sym, v);
- if (type == grob_p
- || type == grob_list_p
- || (unsmob_grob (v) && ly_symbol2scm ("cause") != sym))
- {
- scm_display (scm_list_2 (sym, type), scm_current_output_port ());
- assert (0);
- }
-#endif
+}
+void
+Grob::internal_set_value_on_alist (SCM *alist, SCM sym, SCM v)
+{
/* Perhaps we simply do the assq_set, but what the heck. */
if (!is_live ())
return;
if (do_internal_type_checking_global)
{
- if (!type_check_assignment (sym, v, ly_symbol2scm ("backend-type?")))
- abort ();
+ if (!ly_is_procedure (v)
+ && !is_simple_closure (v)
+ && v != ly_symbol2scm ("calculation-in-progress"))
+ type_check_assignment (sym, v, ly_symbol2scm ("backend-type?"));
+
check_interfaces_for_property (this, sym);
}
- mutable_property_alist_ = scm_assq_set_x (mutable_property_alist_, sym, v);
+ *alist = scm_assq_set_x (*alist, sym, v);
}
-//#define PROFILE_PROPERTY_ACCESSES
-
-
SCM
-Grob::internal_get_property (SCM sym) const
+Grob::internal_get_property_data (SCM sym) const
{
#ifndef NDEBUG
if (profile_property_accesses)
note_property_access (&grob_property_lookup_table, sym);
#endif
+
+ SCM handle = scm_sloppy_assq (sym, mutable_property_alist_);
+ if (handle != SCM_BOOL_F)
+ return scm_cdr (handle);
- SCM s = scm_sloppy_assq (sym, mutable_property_alist_);
- if (s != SCM_BOOL_F)
- return scm_cdr (s);
-
- s = scm_sloppy_assq (sym, immutable_property_alist_);
+ handle = scm_sloppy_assq (sym, immutable_property_alist_);
- if (do_internal_type_checking_global && scm_is_pair (s))
+ if (do_internal_type_checking_global && scm_is_pair (handle))
{
- if (!type_check_assignment (sym, scm_cdr (s),
- ly_symbol2scm ("backend-type?")))
- abort ();
+ SCM val = scm_cdr (handle);
+ if (!ly_is_procedure (val) && !is_simple_closure (val))
+ type_check_assignment (sym, val, ly_symbol2scm ("backend-type?"));
check_interfaces_for_property (this, sym);
}
+
+ return (handle == SCM_BOOL_F) ? SCM_EOL : scm_cdr (handle);
+}
+
+SCM
+Grob::internal_get_property (SCM sym) const
+{
+ SCM val = get_property_data (sym);
- return (s == SCM_BOOL_F) ? SCM_EOL : scm_cdr (s);
+#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 ()));
+ if (debug_property_callbacks)
+ {
+ message ("backtrace: ");
+ print_property_callback_stack ();
+ }
+ }
+#endif
+
+ if (ly_is_procedure (val)
+ || is_simple_closure (val))
+ {
+ Grob *me = ((Grob*)this);
+ val = me->try_callback_on_alist (&me->mutable_property_alist_, sym, val);
+ }
+
+ 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)
+{
+ SCM marker = ly_symbol2scm ("calculation-in-progress");
+ /*
+ need to put a value in SYM to ensure that we don't get a
+ cyclic call chain.
+ */
+ *alist = scm_assq_set_x (*alist, sym, marker);
+
+#ifndef NDEBUG
+ if (debug_property_callbacks)
+ grob_property_callback_stack = scm_cons (scm_list_3 (self_scm (), sym, proc), grob_property_callback_stack);
+#endif
+
+ SCM value = SCM_EOL;
+ if (ly_is_procedure (proc))
+ value = scm_call_1 (proc, self_scm ());
+ else if (is_simple_closure (proc))
+ {
+ value = evaluate_with_simple_closure (self_scm (),
+ simple_closure_expression (proc),
+ false, 0, 0);
+ }
+
+#ifndef NDEBUG
+ if (debug_property_callbacks)
+ grob_property_callback_stack = scm_cdr (grob_property_callback_stack);
+#endif
+
+ /*
+ If the function returns SCM_UNSPECIFIED, we assume the
+ property has been set with an explicit set_property ()
+ call.
+ */
+ if (value == SCM_UNSPECIFIED)
+ {
+ value = get_property_data (sym);
+ assert (value == SCM_EOL || value == marker);
+ if (value == marker)
+ *alist = scm_assq_remove_x (*alist, marker);
+ }
+ else
+ {
+#ifndef NDEBUG
+ if (ly_is_procedure (cache_callback))
+ scm_apply_0 (cache_callback,
+ scm_list_n (self_scm (),
+ sym,
+ proc,
+ value,
+ SCM_UNDEFINED));
+#endif
+ internal_set_value_on_alist (alist, sym, value);
+ }
+
+ return value;
}
void
object_alist_ = scm_assq_set_x (object_alist_, s, v);
}
+void
+Grob::internal_del_property (SCM sym)
+{
+ mutable_property_alist_ = scm_assq_remove_x (mutable_property_alist_, sym);
+}
+
SCM
Grob::internal_get_object (SCM sym) const
{
-#ifdef PROFILE_PROPERTY_ACCESSES
- note_property_access (&grob_property_lookup_table, sym);
-#endif
+ if (profile_property_accesses)
+ note_property_access (&grob_property_lookup_table, sym);
SCM s = scm_sloppy_assq (sym, object_alist_);
+
+ if (s != SCM_BOOL_F)
+ {
+ SCM val = scm_cdr (s);
+ if (ly_is_procedure (val)
+ || is_simple_closure (val))
+ {
+ Grob *me = ((Grob*)this);
+ val = me->try_callback_on_alist (&me->object_alist_, sym, val);
+ }
+
+ return val;
+ }
- return (s == SCM_BOOL_F) ? SCM_EOL : scm_cdr (s);
+ return SCM_EOL;
}
-void
-Grob::substitute_object_links (SCM crit, SCM orig)
+bool
+Grob::is_live () const
{
- set_break_subsititution (crit);
- object_alist_ = substitute_object_alist (orig, object_alist_);
+ return scm_is_pair (immutable_property_alist_);
}
bool
-Grob::is_live () const
+Grob::internal_has_interface (SCM k)
{
- return immutable_property_alist_ != SCM_EOL;
+ return scm_c_memq (k, interfaces_) != SCM_BOOL_F;
}
+
+SCM
+call_pure_function (SCM unpure, SCM args, int start, int end)
+{
+ SCM scm_call_pure_function = ly_lily_module_constant ("call-pure-function");
+
+ return scm_apply_0 (scm_call_pure_function,
+ scm_list_4 (unpure, args, scm_from_int (start), scm_from_int (end)));
+}
+
projects / lilypond.git / blobdiff