Buffer specific binding

Buffer specific binding

[Ian Zimmerman]

What's the best way to bind a key to a command _only in a specific
buffer_?  AFAIK local-set-key will set it in the mode keymap so all
buffers in the same mode will see the change or addition; I'd like to
avoid that.

I know one answer: make a specialized mode (inherited from the real
one).  Any other way?

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Re: Buffer specific binding

[Tassilo Horn]

Ian Zimmerman <itz@buug.org> writes:

> What's the best way to bind a key to a command _only in a specific
> buffer_?  AFAIK local-set-key will set it in the mode keymap so all
> buffers in the same mode will see the change or addition; I'd like to
> avoid that.
>
> I know one answer: make a specialized mode (inherited from the real
> one).  Any other way?

I guess you could define a new keymap with the new bindings which has
the current local map as parent, and then use you new keymap as local
map.

  (let ((map (make-sparse-keymap)))
    (set-keymap-parent map (current-local-map))
    (define-key map (kbd "C-c c")
                (lambda ()
                  (interactive)
                  (message "Hey there!")))
    (use-local-map map))

I guess you can easily wrap that into some function
`iz/define-buffer-local-keys' and then call that conveniently from a
file local variable section:

;; Local Variables:
;; eval: (iz/define-buffer-local-keys
;;         (kbd "C-c c") #'iz/do-this
;;         (kbd "C-c C") #'iz/do-that)
;; End:


HTH,
Tassilo

Re: Buffer specific binding

[Ian Zimmerman]

On 2015-08-26 09:44 +0200, Tassilo Horn wrote:

>   (let ((map (make-sparse-keymap)))
>     (set-keymap-parent map (current-local-map))
>     (define-key map (kbd "C-c c")
>                 (lambda ()
>                   (interactive)
>                   (message "Hey there!")))
>     (use-local-map map))
> 
> I guess you can easily wrap that into some function
> `iz/define-buffer-local-keys' and then call that conveniently from a
> file local variable section:
> 
> ;; Local Variables:
> ;; eval: (iz/define-buffer-local-keys
> ;;         (kbd "C-c c") #'iz/do-this
> ;;         (kbd "C-c C") #'iz/do-that)
> ;; End:

Yes, this works great.  Thanks!

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