Adding a font-lock face to a major mode

Adding a font-lock face to a major mode

[Tim Johnson]

Hi:

I would like to be able to add a font-lock face to a major mode at load
time.

I've written the following code in a file called lisp-mode++. 
I need some help in adding the face properly.
FYI: *If possible*, I'd like this to be cross-compatible to Xemacs.
      but is not a critical need.
;; code follows:
(defconst tj-word-end "\\)\\b")
(defconst tj-word-begin "\\b\\(")
(defconst tj-lisp-user-keywords 
          (concat tj-word-begin ;; test some symbols not highlighted
                  (regexp-opt '( "and" "apply" "concatenate" "format" "funcall" "list" "lambda" 
                                 "mapcar" "not" "print" "push" "return-from " "setf" "setq")) 
                  tj-word-end))
(add-hook 'lisp-mode-hook
          '(lambda ()
             (require 'extra-faces) ;; font-lock-user-keyword-face defined here
             'turn-on-font-lock
             (cons font-lock-defaults  ;; this is wrong, I know!
                   (list tj-lisp-user-keywords '1 'font-lock-user-keyword-face))
             (message "lisp-mode++ loaded")))   ;; test!
(provide 'lisp-mode++) ;; .emacs has (require 'lisp-mode++)
;;

TIA
tim

-- 
Tim Johnson <tim@johnsons-web.com>
      http://www.alaska-internet-solutions.com

Re: Adding a font-lock face to a major mode

[Stefan Monnier]

> I would like to be able to add a font-lock face to a major mode at load
> time.

Try font-lock-add-keywords.


        Stefan

Re: Adding a font-lock face to a major mode

[Tim Johnson]

* Stefan Monnier <monnier@iro.umontreal.ca> [060105 10:19]:
> > I would like to be able to add a font-lock face to a major mode at load
> > time.
> 
> Try font-lock-add-keywords.
 
  <grin> Works like a charm</grin> the kicker, however, is that
  <sigh> I'm tasked with solutions that can be applied to both
         gnu and X emacs. Xemacs does not have that function and
         furthermore, simply exploiting the code doesn't work 
         either, because Xemacs apparently has a significantly different
         structure for syntax highlighting.

  Thanks for the tip Stefan.

  For now it will be a gnu-only solution. Later I can use an 'cond
  form to test the Xemacs and provide an alternate code.

  cheers
  tim

-- 
Tim Johnson <tim@johnsons-web.com>
      http://www.alaska-internet-solutions.com

Re: Adding a font-lock face to a major mode

[Stefan Monnier]

>> I would like to be able to add a font-lock face to a major mode at load
>> time.

> Try font-lock-add-keywords.

Don't listen to what he says: font-lock-add-keywords is not for use by
derived modes, so it's OK to use it if you put it in lisp-mode-hook, but if
you end up creating your own major mode by deriving from lisp-mode, you
should create your own font-lock-defaults value and your own
font-lock-keywords value (built from lisp-font-lock-keywords, of course).


        Stefan "the other one"