Re: PROPOSAL: Bind `org-fold-hide-subtree' by default in Org Mode.

[Karl Fogel]

On 23 Feb 2023, Max Nikulin wrote:
> On 23/02/2023 00:01, Karl Fogel wrote:
> >   (when (not (keymap-lookup nil "C-<tab>"))
> >     (keymap-local-set "C-<tab>" 'org-fold-hide-subtree))
> > So FWIW C-<tab> is not bound in Org Mode buffers for me, in 
> > Emacs
> > 30.x (i.e., recent development builds).
>
> lisp/tab-bar.el:130:  (unless (global-key-binding [(control 
> tab)])
> lisp/tab-bar.el:131:    (global-set-key [(control tab)] 
> #'tab-next))
>
> Minibuffer file cache completion should not be relevant to Org 
> buffers.

Ah, I don't use tab-bar at all (at least not as far as I know), so 
I'm not 100% sure what the above is saying.

Are you saying that the only current default binding for C-<tab> 
in Emacs is that one in tab-bar.el, and therefore we should feel 
free to rebind it in Org Mode?  If so, we should still be 
cautious, since Emacs has policies for maintaining the keybinding 
space.  Generally, the space "C-c C-<LETTER>" is reserved for 
major modes, so ideally we should find something in there if we 
can -- although Org Mode has used up a lot of that space already 
:-), so I'm not sure what's left, unless we decide to swap out 
some existing binding in favor of this one.

(I realize this contradicts what I said in my inital post.  I had 
forgotten that C-<tab> was not part of the mode-reserved space.)

Best regards,
-Karl