bug#50679: 28.0.50; outline-minor-mode-cycle should be able to only cycle at the begining of a line

[Augusto Stoffel]

On Tue, 21 Sep 2021 at 20:58, Juri Linkov <juri@linkov.net> wrote:

>> FWIW, I think it would be nice to provide a simple way to define other
>> “speed keys” in `outline-minor-mode [1], or even provide some
>> pre-configured ones [2].
>>
>> [2]: I personally use these speed keys in outline-minor-mode, which are
>> probably very similar to those from Org mode:
>>
>>         "<tab>" 'outline-cycle
>>         "<backtab>" 'outline-cycle-buffer
>>         "f" 'outline-forward-same-level
>>         "b" 'outline-backward-same-level
>>         "n" 'outline-next-visible-heading
>>         "p" 'outline-previous-visible-heading
>>         "u" 'outline-up-heading
>>         "F" 'outline-move-subtree-down
>>         "B" 'outline-move-subtree-up
>>         "@" 'outline-mark-subtree
>
> But this means you can't type all these keys on heading lines?
> This is why I confugured it not to use self-inserting keys:
>

In my setup those keys only apply at BOL in a heading line.  I never
type anything there.

TAB for reindenting might be a bit trickier.  Apparently I never try to
reindent a heading line when point is at BOL, because I never thought
about a possible conflict, but I guess I would type SPC TAB in that
case.

>   (let ((map outline-mode-cycle-map)
>         (cmds '(("M-<down>"  outline-next-visible-heading)
>                 ("M-<up>"    outline-previous-visible-heading)
>                 ("M-<left>"  outline-hide-subtree)
>                 ("M-<right>" outline-show-subtree))))
>     (dolist (command cmds)
>       (define-key map (kbd (nth 0 command))
>         `(menu-item
>           "" ,(nth 1 command)
>           :filter ,(lambda (cmd)
>                      (when (outline-on-heading-p))
>                        cmd))))))
>
>

I can't find this block in outline.el, is this a suggestion for a
possible default?

>> Looking at the code, it seems that adding bindings to
>> `outline-mode-cycle-map` would achieve precisely that, but the name
>> of the keymap doesn't reflect that.
>
> Do you suggest different keymaps?  And indeed, these two are
> quite different beasts each with own problems.  So we need both
> outline-mode-cycle-map and outline-minor-mode-cycle-map.

Okay, those keymaps are active in the entire heading line, right?

I would prefer to only have a special behavior at the first character of
a heading line, in exchange of allowing _any_ shortcut key with minimal
interference.  Org mode already does that with a simple customization,
(setq org-use-speed-commands t), so I don't think it would be too
surprising for most users.