Re: Font-Locking for Allout Mode

[Stephen Berman <Stephen.Berman@gmx.net>]

On Fri, 09 Mar 2007 15:36:29 -0500 Stefan Monnier
<monnier@iro.umontreal.ca> wrote:

>> (defvar th-allout-font-lock-keywords
>>   '((eval . (list (concat "^\\(?:" allout-regexp "\\).+")
>> 		  0 '(cond ((= (allout-depth) 1)
>> 			    '(1 . font-lock-function-name-face))
>                            ^^^^
> WTH is this for?

Thanks for the heads up.  To my embarassment, I blindly retained the
conses while fiddling with the following code from
http://www.emacswiki.org/cgi-bin/wiki/AllOut, to try and get it to
work in Emacs lisp mode:

(defvar rf-allout-font-lock-keywords
  '(;;
    ;; Highlight headings according to the level.
    (eval . (list (concat "^\\(" outline-regexp "\\).+")
                0 '(or (cdr (assq (outline-depth)
                                  '((1 . font-lock-function-name-face)
                                    (2 . font-lock-variable-name-face)
                                    (3 . font-lock-keyword-face)
                                    (4 . font-lock-builtin-face)
                                    (5 . font-lock-comment-face)
                                    (6 . font-lock-constant-face)
                                    (7 . font-lock-type-face)
                                    (8 . font-lock-string-face))))
                       font-lock-warning-face)
                nil t)))
  "Additional expressions to highlight in Outline mode.")

The proper adaptation should be the following, right?

(defvar srb-allout-font-lock-keywords
  '((eval . (list (concat "^\\(?:" allout-regexp "\\).+")
		  0 '(cond ((= (allout-depth) 1)
			    '(font-lock-function-name-face))
			   ((= (allout-depth) 2)
			    '(font-lock-variable-name-face))
			   ((= (allout-depth) 3)
			    '(font-lock-keyword-face))
			   ((= (allout-depth) 4)
			    '(font-lock-builtin-face))
			   ((= (allout-depth) 5)
			    '(font-lock-comment-face))
			   ((= (allout-depth) 6)
			    '(font-lock-constant-face))
			   ((= (allout-depth) 7)
			    '(font-lock-type-face))
			   ((= (allout-depth) 8)
			    '(font-lock-string-face))
		  t nil)))
  "Additional expressions to highlight in Allout mode.")

While I have your attention, do you have any answers to the questions
I raised in this thread, namely (i) why does
rf-allout-font-lock-keywords, unlike srb-allout-font-lock-keywords,
not work in Emacs lisp mode, and (ii) why does a file visited in Text
mode require `mode: allout' as a file local variable when using
srb-allout-font-lock-keywords in order to get the fontification
automatically, why a file visited in Emacs lisp mode does not need
this file local variable?  I'd appreciate any insight you have on
these questions.

Steve Berman