Re: diff-goto-source hi-jacks my M-o

[Tomas Nordin]

Dmitry Alexandrov <dag@gnui.org> writes:

> Tomas Nordin <tomasn@posteo.net> wrote:
>> Dmitry Alexandrov <dag@gnui.org> writes:
>>> I am not sure, what ‘dummy’ is supposed to mean here?  Minor mode is fully 
>>> functional, that is you are free to disable and reenable it at will:
>>
>> I think I sort of tried to be funny, based on that the mode was made up just 
>> to keep a key binding available in all situations.
>
> No, itʼs not required there, you are free to enable ‘my-precious-keys-map’ 
> unconditionally as well:
>
>       (add-to-list 'emulation-mode-map-alists
>                    (list (cons t my-precious-keys-map)))
>
> if you feel that you will never need to suspend it.

Alright, then we know the way to go if we have a set of bindings that
must never be "hi-jacked"

>
>> And that the trickery with the key-maps is hard to follow for me.
>
> There is no any trickery, just a hardcoded priority order in Emacs itself: 
> global map is overridden by major mode map, which in turn is overridden by 
> minor mode maps, which can be overridden by emulation mode maps.
>
> That is, using a minor mode map would suffice in your specific case — about 
> M-o in diff-mode.  But so would a mere:
>
>       (with-eval-after-load 'diff-mode
>         (define-key diff-mode-map
>           (kbd "M-o") nil)) ; also on RET, o, C-c C-c, which is more than 
> enough

That's the way I go about it. It is rare enough this binding is used
anywhere (apart from the original binding about setting face of course)

Thanks
--
Tomas