ps-print-buffer-with-faces chokes on face attribute property lists

[Nikolaj Schumacher]

Hello,

this bug was reported to me, but I think ps-print is at fault.

When printing a buffer with overlays that specify the 'face property
using a property list, `ps-print-buffer-with-faces' fails.


For instance, the following snippet will throw an error.

(let ((ov (make-overlay (point-min) (point-max) nil)))
  (overlay-put ov 'face '(:foreground "gray"))
  (ps-print-buffer-with-faces))


The reason appears to be `ps-face-attribute-list':

(ps-face-attribute-list '(foreground-color . "gray"))  ; ok
(ps-face-attribute-list '(:foreground "gray"))         ; fails



The original report:

> Hi Nikolaj,
>
>
> Symptoms:
> ps-print-buffer-with-faces returns an error if
> highlight-parentheses-mode is enabled and point is located inside a pair
> of parentheses.  Mini-buffer contains the following error message:
>
> ps-face-attribute-list: Wrong type argument: listp, "firebrick1"
>
>
> Recipe:
> 1.  emacs -q
> 2.  M-x load-file highlight-parentheses.el RET
> 3.  M-x highlight-parentheses-mode RET
> 4.  Now, type: (abc)
> 5.  C-b
> 6.  M-x ps-print-buffer-with-faces
>
>
> I'm using highlight-parentheses v1.0 with Emacs 22.1:
>
>> In GNU Emacs 22.1.50.1 (i386-mingw-nt5.1.2600)
>>  of 2007-07-07 on NEUTRINO
>> Windowing system distributor `Microsoft Corp.', version 5.1.2600
>> configured using `configure --with-gcc (3.4) --cflags 
>> -Ic:/Programme/GnuWin32/include'
>
>
> Thanks,
> Stephan Hennig

The package in question can be found at
http://nschum.de/src/emacs/highlight-parentheses/


regards,
Nikolaj Schumacher