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+;;; oni-outline.el --- Extra functions and commands for outline-mode  -*- 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 extra commands and functions for `outline-mode'.
+
+;;; Code:
+
+(require 'outline)
+
+;;;###autoload
+(defun oni:set-tab-maybe-toggle-outline ()
+  "Wrap the current function mapped to `TAB'."
+  (let ((func (or (lookup-key (current-local-map) (kbd "TAB"))
+                  (lookup-key (current-global-map) (kbd "TAB")))))
+    (local-set-key (kbd "TAB")
+                   (lambda ()
+                     (interactive)
+                     (if (outline-on-heading-p)
+                         (if (outline-invisible-p (line-end-position))
+                             (outline-show-entry)
+                           (outline-hide-entry))
+                       (call-interactively func))))))
+
+(provide 'oni-outline)
+;;; oni-outline.el ends here