GNU bug report logs - #57147
27.2; Problem with kill-new

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From: Ihor Radchenko <yantar92 <at> gmail.com>
To: Po Lu <luangruo <at> yahoo.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 57148 <at> debbugs.gnu.org, 57147 <at> debbugs.gnu.org, larsi <at> gnus.org, alain.cochard <at> unistra.fr
Subject: bug#57147: bug#57148: 27.2; Problem with kill-new
Date: Sat, 13 Aug 2022 20:20:48 +0800

Po Lu <luangruo <at> yahoo.com> writes:

>> Expected: "Constant string" is inserted
>> Observed: Selected region is inserted.
>
> This is intended behavior.  Deactivating the mark will always assert
> ownership over the primary selection with the contents of the region.
>
> See the doc string of `deactivate-mark' for more details.

Can this behaviour be disabled then? It is clearly not the user intention
here when the user calls a function that is supposed to push some
filtered text to `kill-ring' right before deactivating the region.

I am thinking about workaround like

;; Prevent Emacs from adding full selected text to `kill-ring'
;; when `select-enable-primary' is non-nil.
(setq-local filter-buffer-substring-function
            `(lambda (&rest _)
               (setq-local filter-buffer-substring-function
                           ',filter-buffer-substring-function)
               nil))

which seems to work, but looks like a hack.

-- 
Ihor Radchenko,
Org mode contributor,
Learn more about Org mode at https://orgmode.org/.
Support Org development at https://liberapay.com/org-mode,
or support my work at https://liberapay.com/yantar92

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