67 lines
2.5 KiB
EmacsLisp
67 lines
2.5 KiB
EmacsLisp
|
;;; destroy-trailing-whitespace.el --- Destroy all trailing whitespace -*- lexical-binding: t; -*-
|
||
|
|
|
||
|
|
;; Copyright (C) 2016 Tom Willemse
|
||
|
|
|
||
|
|
;; Author: Tom Willemse <chelys@drd>
|
||
|
|
;; Keywords: convenience
|
||
|
|
|
||
|
|
;; This program is free software; you can redistribute it and/or modify
|
||
|
|
;; it under the terms of the GNU General Public License as published by
|
||
|
|
;; the Free Software Foundation, either version 3 of the License, or
|
||
|
|
;; (at your option) any later version.
|
||
|
|
|
||
|
|
;; This program is distributed in the hope that it will be useful,
|
||
|
|
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
;; GNU General Public License for more details.
|
||
|
|
|
||
|
|
;; You should have received a copy of the GNU General Public License
|
||
|
|
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
;;; Commentary:
|
||
|
|
|
||
|
|
;; This library offers a single mode that will delete all trailing
|
||
|
|
;; whitespace before saving any file. It tries to be intelligent
|
||
|
|
;; enough to only do this for modes where trailing whitespace is not
|
||
|
|
;; meaningful. Currently it only keeps whitespace around in
|
||
|
|
;; `markdown-mode' since it uses two spaces at the end of a line to
|
||
|
|
;; signify a line break.
|
||
|
|
;;
|
||
|
|
;; To use this mode in all buffers, add the following to your init
|
||
|
|
;; file:
|
||
|
|
;;
|
||
|
|
;; (require 'destroy-trailing-whitespace)
|
||
|
|
;; (global-destroy-trailing-whitespace-mode)
|
||
|
|
;;
|
||
|
|
;; To use this mode in just some buffers add it to your preferred
|
||
|
|
;; hook. For example, to use it only in `prog-mode' buffers:
|
||
|
|
;;
|
||
|
|
;; (require 'destroy-trailing-whitespace)
|
||
|
|
;; (add-hook 'prog-mode-hook 'destroy-trailing-whitespace-mode)
|
||
|
|
|
||
|
|
;;; Code:
|
||
|
|
|
||
|
|
(defun destroy-trailing-whitespace ()
|
||
|
|
"Delete trailing whitespace everywhere, except in Markdown buffers."
|
||
|
|
(if (not (eq major-mode 'markdown-mode))
|
||
|
|
(delete-trailing-whitespace)))
|
||
|
|
|
||
|
|
;;;###autoload
|
||
|
|
(define-minor-mode destroy-trailing-whitespace-mode
|
||
|
|
"Destroy all trailing whitespace before saving the buffer."
|
||
|
|
:lighter ""
|
||
|
|
(if destroy-trailing-whitespace-mode
|
||
|
|
(add-hook 'before-save-hook 'delete-trailing-whitespace nil :local)
|
||
|
|
(remove-hook 'before-save-hook 'delete-trailing-whitespace :local)))
|
||
|
|
|
||
|
|
;;;###autoload
|
||
|
|
(define-minor-mode global-destroy-trailing-whitespace-mode
|
||
|
|
"Destroy all trailing whitespace before saving any open buffer."
|
||
|
|
:lighter "" :global t
|
||
|
|
(if global-destroy-trailing-whitespace-mode
|
||
|
|
(add-hook 'before-save-hook 'destroy-trailing-whitespace)
|
||
|
|
(remove-hook 'before-save-hook 'destroy-trailing-whitespace)))
|
||
|
|
|
||
|
|
(provide 'destroy-trailing-whitespace)
|
||
|
|
;;; destroy-trailing-whitespace.el ends here
|