CODEWITHSUNDEEP
emacsface
Romain
Romain

Reputation: 81

Applying custom face in emacs

I wanted to make a derived mode for python-mode to add custom keywords and color. So I retreived the part of the code that defines the face of the keywords and added my own keywords.

If I use an already existing face it works just fine. But I want to use custom faces so it doesn't change color if in the same time of other faces. I search how to define a face and end up with this:

(defface printr-face
  '((t :foreground "red" :weight bold))
  "Face for printr function"
  :group 'python-print-color-faces)

the part of the code I try to apply it (inside the variable "python-font-lock-keywords") look like this:

(,(rx symbol-start (or "printr") symbol-end) . printr-face)

The printr-face does appear in the list when I use M-x list-faces-display.

But the face isn't applied. M-x describe-face see it as default.

What am I doing wrong? How can I use my newly defined face ?

Upvotes: 0

Views: 1629

Answers (2)

Romain
Romain

Reputation: 81

choroba was in the right. Also I missed a set a parenthesis in the defface:

(defface printr-face `((t (:foreground "red" :weight bold))) "Face for printr function"
  :group  'python-print-color)

(I forgot to encapsulated the :forground :weight)

then

 (font-lock-add-keywords
 'python-print-color-mode
 '(("printr" . 'printr)
   ("printg" . 'printg)))

Note that I had to use "." instead of "1" to make it work. Not sure what the "1" should have done but it wasn't working for me.

Upvotes: 1

choroba
choroba

Reputation: 241758

When adding new faces to new keywords, you need to add the keywords, too:

(font-lock-add-keywords
 'my-mode
 '(("regex1" 1 'my-face1)
   ("regex2" 1 'my-face2))
 1)

Upvotes: 1

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