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+;;; oni-editing.el --- General editing commands and functions  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2015  Tom Willemse
+
+;; Author: Tom Willemse <tom@ryuslash.org>
+;; Keywords:
+
+;; 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:
+
+;; Here are some general editing functions and commands.
+
+;;; Code:
+
+(defun oni:change-number-at-point (change-func)
+  "Use CHANGE-FUNC to change the number at `point'."
+  (let ((num (number-to-string (funcall change-func (number-at-point))))
+        (bounds (bounds-of-thing-at-point 'word)))
+    (save-excursion
+      (delete-region (car bounds) (cdr bounds))
+      (insert num))))
+
+(defun oni:change-prev-case (num dir)
+  "Change the case of the region or previous word."
+  (let ((regfunc (if (eq dir 'up) 'upcase-region 'downcase-region))
+        (wordfunc (if (eq dir 'up) 'upcase-word 'downcase-word)))
+    (if (> num 1)
+        (funcall regfunc (point) (- (point) num))
+      (funcall wordfunc -1))))
+
+;;;###autoload
+(defun oni:decrease-number-at-point ()
+  "Take the number at `point' and replace it with it decreased by 1."
+  (interactive)
+  (oni:change-number-at-point #'1-))
+
+;;;###autoload
+(defun oni:downcase-prev (num)
+  (interactive "p")
+  (oni:change-prev-case num 'down))
+
+;;;###autoload
+(defun oni:increase-number-at-point ()
+  "Take the number at `point' and replace it with it increased by 1."
+  (interactive)
+  (oni:change-number-at-point #'1+))
+
+;;;###autoload
+(defun oni:upcase-prev (num)
+  (interactive "p")
+  (oni:change-prev-case num 'up))
+
+(provide 'oni-editing)
+;;; oni-editing.el ends here