dotfiles/emacs/.emacs.d/init/oni-css-mode-init.el

;;; oni-css-mode-init.el --- CSS Mode configuration  -*- lexical-binding: t; -*-

;; Copyright (C) 2018  Tom Willemse

;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: local

;; 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 <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Configuration for `css-mode'.

;;; Code:

(require 'css-mode)
(require 'hydra)
(eval-when-compile (require 'compile))

(defun oni:css-property-important-p ()
  "Return whether or not the current property is important."
  (save-excursion
    (beginning-of-line)
    (re-search-forward "!important" (line-end-position) :noerror)))

(defun oni:css-add-important ()
  "Add an important flag to the property on the current line."
  (interactive)
  (unless (oni:css-property-important-p)
    (save-excursion
      (end-of-line)
      (when (re-search-backward ";" (line-beginning-position) :noerror)
        (insert " !important")))))

(defun oni:css-remove-important ()
  "Remove the important flag from the property on the current line."
  (interactive)
  (when (oni:css-property-important-p)
    (save-excursion
      (end-of-line)
      (when (re-search-backward " !important" (line-beginning-position) :noerror)
        (replace-match "")))))

(defun oni-css-mode-init--toggle-important ()
  "Toggle the important flag on the property on the current line."
  (interactive)
  (if (oni:css-property-important-p)
      (oni:css-remove-important)
    (oni:css-add-important)))

(add-hook 'css-mode-hook 'electric-pair-local-mode)
(add-hook 'css-mode-hook 'electric-indent-local-mode)
(add-hook 'css-mode-hook 'company-mode)
(add-hook 'css-mode-hook 'fci-mode)

(with-eval-after-load 'compile
  (defvar oni:scss-error-regexp
    (rx (and bol
             (zero-or-more space) "on line "
             (group (one-or-more digit)) " of "
             (group (one-or-more (or word punct (syntax symbol))))
             eol)))

  (add-to-list 'compilation-error-regexp-alist
               (list oni:scss-error-regexp 2 1 nil 2 2)))

(defhydra css-mode-hydra (:color blue)
  ("!" oni-css-mode-init--toggle-important))

(define-key css-mode-map (kbd "C-c m") #'css-mode-hydra/body)

(provide 'oni-css-mode-init)
;;; oni-css-mode-init.el ends here