CODEWITHSUNDEEP
emacsfont-lock
jilocoiner
jilocoiner

Reputation: 105

How to change color of a certain string in Emacs?

Let's say I want all words "bad" be red (#ff0000).

What should I add to init.el so the color of the string/word "bad" will turn red in all modes whether it is org mode or some other mode into this:

https://i.imgur.com/7WMwG1s.png

I would like to do it in every file I have open and if possible it should be real time without any manual evaluation etc.

Is it possible to achieve in Emacs without installing any plugin?

Upvotes: 2

Views: 433

Answers (2)

jpkotta
jpkotta

Reputation: 9417

There is already a package called hl-todo (https://github.com/tarsius/hl-todo). You can configure which keywords are highlighted and which colors with hl-todo-keyword-faces). You can configure which modes it's active in with either mode hooks or hl-todo-activate-in-modes.

Upvotes: 1

Rorschach
Rorschach

Reputation: 32426

You can define a globalized minor mode that will be active in all your buffers quite easily, eg.

(defconst my-font-lock-keywords '(("\\_<bad\\_>" . font-lock-warning-face)))

(define-minor-mode my-font-lock-mode ""
  :init-value nil
  :lighter ""
  (if my-font-lock-mode
      (font-lock-add-keywords nil my-font-lock-keywords)
    (font-lock-remove-keywords nil my-font-lock-keywords))
  (font-lock-flush))

(define-global-minor-mode my-font-lock-global-mode my-font-lock-mode
  (lambda () (my-font-lock-mode)))

Then, activate it with M-x my-font-lock-global-mode (or in your init)

Upvotes: 3

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