90 lines
3.5 KiB
EmacsLisp
90 lines
3.5 KiB
EmacsLisp
;;; spacemacs-whitespace-cleanup.el --- Cleanup whitspace automatically.
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;; Author: Sylvain Benner <sylvain.benner@gmail.com>
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;; Keywords: editing, whitespace, spacemacs
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;; Version: 0.1
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;; This file is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; This file is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; This package adds a minor mode to automatically cleanup whitespace.
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;; It requires Spacemacs and depends on the value of the variable
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;; `dotspacemacs-whitespace-cleanup' (see documentation in dotfile).
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;;; Code:
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(defvar spacemacs-whitespace-cleanup-globally nil
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"If non nil then `spacemacs-whitespace-cleanup-mode' is applied globally.")
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;;;###autoload
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(define-minor-mode spacemacs-whitespace-cleanup-mode
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"Minor mode to clean whitespace.
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The minor mode is based on the value of the dotfile variable
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`dotspacemacs-whitespace-cleanup' to determine the behavior
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of the cleanup."
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:lighter " CleanW"
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:group 'spacemacs
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(if spacemacs-whitespace-cleanup-mode
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(spacemacs-whitespace-cleanup//turn-on
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spacemacs-whitespace-cleanup-globally)
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(spacemacs-whitespace-cleanup//turn-off
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spacemacs-whitespace-cleanup-globally)))
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(define-global-minor-mode global-spacemacs-whitespace-cleanup-mode
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spacemacs-whitespace-cleanup-mode
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(lambda ()
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(let ((spacemacs-whitespace-cleanup-globally t))
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(spacemacs-whitespace-cleanup-mode)))
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:group 'spacemacs
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:require 'spacemacs-whitespace-cleanup-mode)
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(defun spacemacs-whitespace-cleanup/on-message (&optional global)
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"Return a string to display when the mode is activated."
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(format "whitespace-cleanup enabled%s (%s)"
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(if global " globally" "")
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(pcase dotspacemacs-whitespace-cleanup
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('all "all whitespace")
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('trailing "trailing whitespace")
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('changed "changed lines")
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(x (user-error
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"%s is not a valid option for 'dotspacemacs-whitespace-cleanup'"
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x)))))
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(defun spacemacs-whitespace-cleanup//turn-on (&optional global)
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"Turn on `spacemacs-whitespace-cleanup-mode'."
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(pcase dotspacemacs-whitespace-cleanup
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('all
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(add-hook 'before-save-hook 'whitespace-cleanup nil (not global)))
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('trailing
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(add-hook 'before-save-hook 'delete-trailing-whitespace nil (not global)))
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('changed
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(when (fboundp 'ws-butler-mode)
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(if global (ws-butler-global-mode) (ws-butler-mode))))))
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(defun spacemacs-whitespace-cleanup//turn-off (&optional global)
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"Turn off `spacemacs-whitespace-cleanup-mode'."
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(pcase dotspacemacs-whitespace-cleanup
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('all
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(remove-hook 'before-save-hook 'whitespace-cleanup (not global)))
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('trailing
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(remove-hook 'before-save-hook 'delete-trailing-whitespace (not global)))
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('changed
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(when (fboundp 'ws-butler-mode)
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(if global (ws-butler-global-mode -1) (ws-butler-mode -1))))))
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(provide 'spacemacs-whitespace-cleanup)
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;;; spacemacs-whitespace-cleanup.el ends here.
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