Function: ruler--save-header-line-format

ruler--save-header-line-format is a byte-compiled function defined in ruler-mode.el.gz.

Signature

(ruler--save-header-line-format)

Documentation

Install the header line format for Ruler mode.

Unless Ruler mode is already enabled, save the old header line format first.

Source Code

;; Defined in /usr/src/emacs/lisp/ruler-mode.el.gz
(defun ruler--save-header-line-format ()
  "Install the header line format for Ruler mode.
Unless Ruler mode is already enabled, save the old header line
format first."
  (when (and (not ruler-mode)
	     (local-variable-p 'header-line-format)
	     (not (local-variable-p 'ruler-mode-header-line-format-old)))
    (setq-local ruler-mode-header-line-format-old
                header-line-format))
  (setq header-line-format ruler-mode-header-line-format))