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emacs AUCTeX macros fontification

I recently started using the excellent package xargs that provides \\newcommandx . It shares a syntax similar to the default \\newcommand . I would like font-lock to reflect this. I did

(custom-set-variables
 '(font-latex-user-keyword-classes
   (quote (("cx" ("newcommandx" "*|{\\[[{")
        (:family "font-lock-type-face") command)))))

But this fontifies just the command name itself, not its body ( \\newcommand fontifies the body with 'font-lock-function-name-face , which in my case is bold). I want \\newcommandx to fontify its body with 'font-lock-function-name-face .

To summarize the question: how to make fontification for \\newcommandx be exactly the same as for \\newcommand (ie bold body in my case)?

Here is an example that you can modify to suit your needs. See lines 280 to 436 of font-latex.el within auctex-11.86 for a complete list of predefined keywords. The following examples are used to add additional keywords, and/or define your own coloration for the contents of wavy / square brackets.

;; \EFFECT{[font-lock-function-name-face]}
(setq font-latex-match-function-keywords
    '(
        ("newcommandx" "*|{\\[[{")
    )
 )


;; \EFFECT{[font-lock-constant-face]}
(setq font-latex-match-reference-keywords
    '(
        ("fancypagestyle" "[{")
        ("fancyhead" "[{")
        ("fancyfoot" "[{")
    )
 )


;; \EFFECT{[font-lock-type-face]}
(setq font-latex-match-textual-keywords
    '(
        ("parentext" "{")
        ("hybridblockquote" "[{")
        ("parskip" "")
        ("footskip" "")
    )
)


;; \EFFECT{[font-lock-variable-name-face]}
(setq font-latex-match-variable-keywords
    '(
        ("newgeometry" "[{")
        ("quotingsetup" "[{")
        ("TabPositions" "[{")
        ("rfoot" "")
    )
)


;; \font-latex-warning-face
(setq font-latex-match-warning-keywords
    '(
        ("fixme" "{") 
    )
)


;; only affects inside wavy brackets
(setq font-latex-user-keyword-classes
          '(("my-warning-commands"
                (("fixme" "{"))
                (:foreground "purple" :background "yellow")
                command)))

See also: http://www.gnu.org/software/auctex/manual/auctex/Fontification-of-macros.html


I have chosen the following method to customize all of my special keywords:

(defvar lawlist-face-01 (make-face 'lawlist-face-01))
(set-face-background 'lawlist-face-01 "black")
(set-face-foreground 'lawlist-face-01 "white")
(set-face-bold-p 'lawlist-face-01 t)
(set-face-italic-p 'lawlist-face-01 t)
(set-face-underline-p 'lawlist-face-01 t)
(set-face-underline 'lawlist-face-01 "yellow")

(defvar lawlist-face-02 (make-face 'lawlist-face-02))
(set-face-attribute 'lawlist-face-02 nil :background "gray" :foreground "red" :font "Courier" :height 180 :bold t :underline "yellow" :italic t)

(font-lock-add-keywords 'latex-mode '(
("\\\\test01\\|insert\\|BUGS\\|FIXME\\|TODO\\|and\\|or\\|not" 0 lawlist-face-01 prepend) ;; 0 = highlight all
("\\\\test02\\|INSERT\\|document-name\\|\\\\begin{document}" 0 lawlist-face-02 prepend) ;; 0 = highlight all
("\\test01{\\([^}]*\\)}" 1 lawlist-face-02 prepend) ;; 1 = colorize contents of wavy brackets
))

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