Re: How not to share `local-set-key' with all other buffers in the same major mode?

[Jean Louis <bugs@gnu.support>]

* Stefan Monnier <monnier@iro.umontreal.ca> [2021-04-02 15:56]:
> > I would like to use editing modes as temporary view modes where I
> > would like to set a key like "q" or "i" temporarily, like this for
> > example:
> >
> > (local-set-key "q" 'quit-window)
> >
> > And I use it in read only mode. The binding goes in the current
> > buffer’s local map, which in most cases is shared with all other
> > buffers in the same major mode.
> 
> To avoid it, you can use something like:
> 
>     (use-local-map
>      (let ((map (make-sparse-keymap)))
>        (set-keymap-parent map (current-local-map))
>        map))
> 
> before doing your `local-set-key`.

Thank you. I made a function, and now it works nicely this way:

(defun hyperscope-view-local-map (id column)
  (interactive)
  (let ((map (make-sparse-keymap)))
    ;;(set-keymap-parent map (make-composed-keymap view-mode-map))
    (define-key map "q" 'quit-window)
    (define-key map "i" (lambda ()
			  (interactive)
			  (hyperscope-view-with-mode id
						     (cond ((string= column "hlinks_description") "hlinks_text")
							   ((string= column "hlinks_text") "hlinks_description")
							   (t (error "Cannot find column"))))))
    (define-key map "e" (lambda ()
			  (interactive)
			  (hyperscope-edit-with-mode id column)
			  (kill-this-buffer)
			  (hyperscope-view-with-mode id column)))
    (use-local-map map)))

When I wish now to use the map, I just provide one line:

(hyperscope-view-local-map id column)


-- 
Jean

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