Variable: display-line-numbers-mode-hook

display-line-numbers-mode-hook is a customizable variable defined in display-line-numbers.el.gz.

Value

(display-line-numbers-mode-set-explicitly(var)/display-line-numbers-mode-set-explicitly(fun))

Documentation

Hook run after entering or leaving display-line-numbers-mode(var)/display-line-numbers-mode(fun).

No problems result if this variable is not bound. add-hook automatically binds it. (This is true for all hook variables.)

Source Code

;; Defined in /usr/src/emacs/lisp/display-line-numbers.el.gz
;;;###autoload
(define-minor-mode display-line-numbers-mode
  "Toggle display of line numbers in the buffer.
This uses `display-line-numbers' internally.

To change the type of line numbers displayed by default,
customize `display-line-numbers-type'.  To change the type while
the mode is on, set `display-line-numbers' directly."
  :lighter nil
  (if display-line-numbers-mode
      (progn
        (when display-line-numbers-width-start
          (setq display-line-numbers-width
                (length (number-to-string
                         (+ (count-lines (point-min) (point-max))
                            (if (and (numberp display-line-numbers-width-start)
                                     (> display-line-numbers-width-start 0))
                                display-line-numbers-width-start
                              0))))))
        (when display-line-numbers-grow-only
          (add-hook 'pre-command-hook #'display-line-numbers-update-width nil t))
        (setq display-line-numbers display-line-numbers-type))
    (remove-hook 'pre-command-hook #'display-line-numbers-update-width t)
    (setq display-line-numbers nil)))