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

[Karl Fogel]

Okay, today I did some research and found that every "C-c 
C-<letter>" binding is used in Org Mode except for "C-c C-g". 
While that one is technically reserved for the mode's use, I 
suspect the reason it's unbound is that people are accustomed to 
using C-g as a quit command (and they get that effect if they 
accidentally type C-c, because then they type C-g and it's just an 
undefined key -- i.e., it quits, which is what the user wanted).

Note that while "C-c C-h" does not appear to be bound, it actually 
is: it gets you a help buffer about the Org Mode keybindings 
(which then, ironically, does not list "C-c C-h" as one of the 
bindings).

(It's not clear to me whether Emacs's conventions consider "C-c 
C-i" to be a letter or whether they treat "C-i" as "TAB" and 
consider it special; based on the previous evidence in this 
thread, maybe the latter, so we shouldn't consider "C-c C-i" to be 
available.)

I think what this is telling me is that Org Mode keybinding real 
estate is quite valuable :-), and that unless there are other 
people who feel as strongly as I do that `org-fold-hide-subtree' 
is amazingly useful, we probably won't decide to bind it by 
default in Org Mode.  So I should just continue to bind it to a 
custom key myself and continue to live a glorious life all alone 
in my private keymap splendour.

Best regards,
-Karl

I wrote:
> On 23 Feb 2023, Max Nikulin wrote:
> > On 23/02/2023 00:01, Karl Fogel wrote:
> > >  =C2=A0(when (not (keymap-lookup nil "C-<tab>"))
> > >  =C2=A0=C2=A0 (keymap-local-set "C-<tab>" 
> > >  'org-fold-hide-subtree))
> > > So FWIW C-<tab> is not bound in Org Mode buffers for me, in=20
> > > Emacs
> > > 30.x (i.e., recent development builds).
> >
> > lisp/tab-bar.el:130:  (unless (global-key-binding [(control=20
> > tab)])
> > lisp/tab-bar.el:131:    (global-set-key [(control tab)]=20
> > #'tab-next))
> >
> > Minibuffer file cache completion should not be relevant to 
> > Org=20
> > buffers.
>
> Ah, I don't use tab-bar at all (at least not as far as I know), 
> so=20
> I'm not 100% sure what the above is saying.
>
> Are you saying that the only current default binding for 
> C-<tab>=20
> in Emacs is that one in tab-bar.el, and therefore we should 
> feel=20
> free to rebind it in Org Mode?  If so, we should still be=20
> cautious, since Emacs has policies for maintaining the 
> keybinding=20
> space.  Generally, the space "C-c C-<LETTER>" is reserved for=20
> major modes, so ideally we should find something in there if 
> we=20
> can -- although Org Mode has used up a lot of that space 
> already=20
> :-), so I'm not sure what's left, unless we decide to swap out=20
> some existing binding in favor of this one.
>
> (I realize this contradicts what I said in my inital post.  I 
> had=20
> forgotten that C-<tab> was not part of the mode-reserved space.)