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bug#60101: 29.0.60; help-quick should use C-/ for undo
From: |
Juri Linkov |
Subject: |
bug#60101: 29.0.60; help-quick should use C-/ for undo |
Date: |
Sat, 17 Dec 2022 19:16:06 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/30.0.50 (x86_64-pc-linux-gnu) |
>> In lisp/bindings.el its preferred binding is defined by this line:
>>
>> (put 'undo :advertised-binding [?\C-x ?u])
>
> That is good, but it only solves the problem by providing the means.
> The other issue is figuring out how the advertised binding can
> automatically be set to whatever is preferred on the current system. Is
> there a way to find out what keyboard layout is being used, or at least
> what modifiers have to be pressed for a key to be input?
If a key would be unbound on a tty, this could help to exclude it
from the preferred keybindings. For example, if C-/ was unbound
depending on a tty type, then this would fall back to 'C-x u':
(put 'undo :advertised-binding '([?\C-/] [?\C-x ?u]))
But otherwise, could you formulate a clear criteria for excluding
some keys from the set of preferred keys? Do you know how to
query the current keyboard layout, or to find the preferred modifiers?