;;; subword-mode-expansions.el --- Expansions for subword-mode to be used for CamelCase

;; Copyright (C) 2014-2020  Free Software Foundation, Inc

;; Author: Lefteris Karapetsas
;; Keywords: marking region

;; 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:

;; Provides extra expansions for subword mode so that when
;; subword-mode is non-nil different words can be selected in CamelCase.
;; Feel free to contribute any other expansions:
;;
;;     https://github.com/magnars/expand-region.el

;;; Code:

(require 'expand-region-core)
(require 'subword)

(defun er/mark-subword ()
  "Mark a subword, a part of a CamelCase identifier."
  (interactive)
  (when (and subword-mode
             expand-region-subword-enabled)
    (subword-right 1)
    (set-mark (point))
    (subword-left 1)))

(defun er/add-subword-mode-expansions ()
  "Add expansions for buffers in `subword-mode'."
  (set (make-local-variable 'er/try-expand-list)
       (append er/try-expand-list
               '(er/mark-subword))))

(er/enable-minor-mode-expansions 'subword-mode 'er/add-subword-mode-expansions)

(provide 'subword-mode-expansions)
;;; subword-mode-expansions.el ends here