override/delete translation of C-S-y?

override/delete translation of C-S-y?

[Stephen Leake]

I'm trying to bind "\C-Y" to yank-from-kill-ring (I already have the
other modifies on C-y bound).

However, something is translating "\C-Y" to "\C-y"; according to the
elisp manual on translating keys, it's one of ‘input-decode-map’,
‘local-function-key-map’, or ‘key-translation-map’.

However, (lookup-key *-map "\C-Y") returns nil for all those maps, as
does (lookup-key *-map "\C-y").

I tried greping in the source to find where those keymaps are set, but I
did not find C-y.

How do I find the right key binding to override/delete?

-- 
-- Stephe

Re: override/delete translation of C-S-y?

[Stefan Monnier]

> However, (lookup-key *-map "\C-Y") returns nil for all those maps, as
> does (lookup-key *-map "\C-y").

(equal "\C-y" "\C-Y") ==> t

I think you want something like [?\S-\C-y]


        Stefan

Re: override/delete translation of C-S-y?

[Stephen Leake]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> However, (lookup-key *-map "\C-Y") returns nil for all those maps, as
>> does (lookup-key *-map "\C-y").
>
> (equal "\C-y" "\C-Y") ==> t
>
> I think you want something like [?\S-\C-y]

Thanks, that works:

(define-key global-map [?\S-\C-y] 'yank-from-kill-ring)

-- 
-- Stephe

Re: override/delete translation of C-S-y?

[Phil Sainty]

On 2021-06-10 10:18, Stephen Leake wrote:
> I'm trying to bind "\C-Y" to yank-from-kill-ring (I already have the
> other modifies on C-y bound).
> 
> However, something is translating "\C-Y" to "\C-y"

The problem is that (AFAIR) those *are* the same thing.

(kbd "C-Y")
"^Y"

(kbd "C-y")
"^Y"

Such control characters have always been case-insensitive.

As it happens, you put the solution in your subject line:

(kbd "C-S-y")
[33554457]

That event wouldn't be sent in a terminal, but you should be able to
use it in GUI frames.


-Phil

Re: override/delete translation of C-S-y?

[Phil Sainty]

I'll add that "(emacs)Modifier Keys" says:

    A <Control>-modified alphabetical character is always considered
case-insensitive: Emacs always treats ‘C-A’ as ‘C-a’, ‘C-B’ as ‘C-b’,
and so forth.  The reason for this is historical.