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bug#47215: 28.0.50; Let M-x switch between M-x and M-X
From: |
Felician Nemeth |
Subject: |
bug#47215: 28.0.50; Let M-x switch between M-x and M-X |
Date: |
Sat, 10 Apr 2021 19:56:49 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Lars Ingebrigtsen <larsi@gnus.org> writes:
> Felician Nemeth <felician.nemeth@gmail.com> writes:
>
>>> I'm not quite sure how to implement this, though -- we basically end up
>>> in `completing-read', and `execute-extended-command-for-buffer' would
>>> have to define an `M-x' binding there, I guess... and then somehow call
>>> `read-extended-command' with the text already in the minibuffer.
>>>
>>> Anybody got an idea as to how to implement this without rewriting
>>> `read-extended-command' completely?
>>
>> The execute-extended-commands have two undocumented optional arguments
>> (command-name and typed). What are they used for?
>>
>> Anyway, following the fallback logic of `ido-find-file', I was able to
>> rebind `M-x' and save the content of the minibuffer with a non-standard
>> exit from `execute-extended-command'. Maybe the ugly code below can
>> give ideas to someone more knowledgeable.
>
> Thanks -- I was wondering more about the situation where you've typed
>
> M-X foo|bar
>
> (| for point)
>
> and then hit `M-x' because you want to switch to the other mode.
> Ideally, `M-x' should do that, and also preserve the text the user has
> typed, and the cursor position. I don't see an obvious simple way to do
> that...
I've discovered that the initial-input argument of `completing-read` can
be written as (STRING . POSITION). The attached patch makes use of it
and shows a simple implementation of my original wish.
However, the patch creates code duplication. Also, I don't know how it
copes with recursive editing: maybe it's not a good idea to rebind M-x
when `enable-recursive-minibuffers' is t. Finally, the docstring says
initial-input is deprecated.
I'm happy to work on the patch if you guide me to the right direction,
but this time I'd rather receive a fish instead of being taught how to
fish :)
m-x.patch
Description: