[outline] toggle children if on heading, else indent

init.org

@@ -2920,12 +2920,22 @@ pjb suggested a different approach [[http://paste.lisp.org/display/10157][here]]
 (use-package outline
   :hook (adoc-mode . outline-minor-mode)
   :bind (:map outline-minor-mode-map
-              ("TAB" . outline-toggle-children)
+              ("TAB" . contrapunctus-outline-indent-or-toggle-children)
               ;; this (rather than `outline-show-children') seems to
               ;; be the equivalent of `org-show-subtree'
               ("C-c C-k" . outline-show-branches)))
 #+END_SRC
 
+#+BEGIN_SRC emacs-lisp
+(defun contrapunctus-outline-indent-or-toggle-children ()
+  (interactive)
+  (if (save-excursion
+        (goto-char (point-at-bol))
+        (looking-at-p outline-regexp))
+      (outline-toggle-children)
+    (indent-for-tab-command)))
+#+END_SRC
+
 ** custom.el
 #+BEGIN_SRC emacs-lisp
 (setq custom-file "~/.emacs.d/custom.el")