Lisp_Object Qface_alias;
+extern Lisp_Object Qcircular_list;
+
/* Default stipple pattern used on monochrome displays. This stipple
pattern is used on monochrome displays instead of shades of gray
for a face background color. See `set-face-stipple' for possible
static void map_tty_color P_ ((struct frame *, struct face *,
enum lface_attribute_index, int *));
-static Lisp_Object resolve_face_name P_ ((Lisp_Object));
+static Lisp_Object resolve_face_name P_ ((Lisp_Object, int));
static int may_use_scalable_font_p P_ ((const char *));
static void set_font_frame_param P_ ((Lisp_Object, Lisp_Object));
static int better_font_p P_ ((int *, struct font_name *, struct font_name *,
}
/* Resolve face name FACE_NAME. If FACE_NAME is a string, intern it
- to make it a symvol. If FACE_NAME is an alias for another face,
- return that face's name. */
+ to make it a symbol. If FACE_NAME is an alias for another face,
+ return that face's name.
+
+ Return default face in case of errors. */
static Lisp_Object
-resolve_face_name (face_name)
+resolve_face_name (face_name, signal_p)
Lisp_Object face_name;
+ int signal_p;
{
- Lisp_Object aliased;
- Lisp_Object args[2];
- int c = 0;
+ Lisp_Object orig_face;
+ Lisp_Object tortoise, hare;
if (STRINGP (face_name))
face_name = intern (SDATA (face_name));
- /* Protect against loops by limiting the number of indirections. */
- while (SYMBOLP (face_name) && c < 10)
+ if (NILP (face_name) || !SYMBOLP (face_name))
+ return face_name;
+
+ orig_face = face_name;
+ tortoise = hare = face_name;
+
+ while (1)
{
- /* Fget can signal an error; just ignore it. */
- args[0] = face_name;
- args[1] = Qface_alias;
- aliased = internal_condition_case_2 (internal_resolve_face_name, 2, args, Qt,
- resolve_face_name_error);
- if (NILP (aliased))
+ face_name = hare;
+ hare = Fget (hare, Qface_alias);
+ if (NILP (hare) || !SYMBOLP (hare))
break;
- else
- face_name = aliased;
- c++;
+
+ face_name = hare;
+ hare = Fget (hare, Qface_alias);
+ if (NILP (hare) || !SYMBOLP (hare))
+ break;
+
+ tortoise = Fget (tortoise, Qface_alias);
+ if (EQ (hare, tortoise))
+ {
+ if (signal_p)
+ Fsignal (Qcircular_list, Fcons (orig_face, Qnil));
+ return Qdefault;
+ }
}
return face_name;
{
Lisp_Object lface;
- face_name = resolve_face_name (face_name);
+ face_name = resolve_face_name (face_name, signal_p);
if (f)
lface = assq_no_quit (face_name, f->face_alist);
CHECK_SYMBOL (face);
CHECK_SYMBOL (attr);
- face = resolve_face_name (face);
+ face = resolve_face_name (face, 1);
/* If FRAME is 0, change face on all frames, and change the
default for new frames. */
int c;
struct face *base_face;
{
+ struct face *face = NULL;
#ifdef HAVE_WINDOW_SYSTEM
- struct face *face, *default_face;
+ struct face *default_face;
struct frame *f;
Lisp_Object stipple, overline, strike_through, box;
face->stipple = load_pixmap (f, stipple, &face->pixmap_w, &face->pixmap_h);
xassert (FACE_SUITABLE_FOR_CHAR_P (face, c));
- return face;
#endif /* HAVE_WINDOW_SYSTEM */
+ return face;
}