font-lock-add-keywords

font-lock-add-keywords

[Randy Haddox]

I am using code in .emacs to find and color code various keywords.  I
haven't had any luck handling the "if" keyword when it doesn't starting
in column 1 (ie, has leading whitespace).  Most of the time the "if"
will start at the beginning.

(defface test-keyword6-face
  '((t (:foreground "gold")))
  "Keyword face.")
(font-lock-add-keywords 'latex-mode
  '(("^if\\|then\\|else\\|endif" . 'test-keyword6-face))
)


Any help would be much appreciated.


Thanks,
Randy

Re: font-lock-add-keywords

[Kevin Rodgers]

Randy Haddox wrote:
 > I am using code in .emacs to find and color code various keywords.  I
 > haven't had any luck handling the "if" keyword when it doesn't starting
 > in column 1 (ie, has leading whitespace).  Most of the time the "if"
 > will start at the beginning.
 >
 > (defface test-keyword6-face
 >   '((t (:foreground "gold")))
 >   "Keyword face.")
 > (font-lock-add-keywords 'latex-mode
 >   '(("^if\\|then\\|else\\|endif" . 'test-keyword6-face))
 > )

Well you've explicitly anchored "if" to the beginning of the line with
"^".  (None of the other keywords are anchored, due to the low
precedence of "\\|").  Getting rid of the "^" should fix it.

-- 
Kevin Rodgers

Re: font-lock-add-keywords

[Arjan Bos]

Randy Haddox wrote:

> I am using code in .emacs to find and color code various keywords.  I
> haven't had any luck handling the "if" keyword when it doesn't starting
> in column 1 (ie, has leading whitespace).  Most of the time the "if"
> will start at the beginning.
> 
> (defface test-keyword6-face
>   '((t (:foreground "gold")))
>   "Keyword face.")
> (font-lock-add-keywords 'latex-mode
>   '(("^if\\|then\\|else\\|endif" . 'test-keyword6-face))
> )
> 
> 
> Any help would be much appreciated.
> 
> 
So `if' can have zero or more whitespaces in front of it. And perhaps 
there might even be a tab character in front of it too. So you might 
want to consider matching

"^[ \t]*if\\|then\\|else\\|endif"

"^" will match the beginning of a line (as you know)
"[ \t]" will match a whitespace or a tab character
"*" will match zero or more of the thing before it.
So "[ \t]*" will match zero or more of either whitespace or tab and
"^[ \t]*if" will match `if' starting on a line with zero or more 
whitespace and / or tab characters in front of it.

HTH,

Arjan


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