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bug#64547: `show-paren-mode` thinks that a paren is offscreen in `M-:` w
From: |
Eli Zaretskii |
Subject: |
bug#64547: `show-paren-mode` thinks that a paren is offscreen in `M-:` when it isn't |
Date: |
Sat, 15 Jul 2023 10:22:10 +0300 |
> Date: Sat, 15 Jul 2023 01:06:54 +0000
> From: okamsn@protonmail.com
> Cc: 64547@debbugs.gnu.org, stephen.berman@gmx.net
>
> 1) Start `emacs -q` without the new change to paren.el.
>
> 2) Set `show-paren-context-when-offscreen` to `overlay`.
>
> 3) In a normal buffer (not the minibuffer), move to the end of a long
> expression so that the starting parenthesis is no longer on the screen
> and is not visible.
>
> 4) See the overlay, as expected.
>
> 5) Move inside the expression so that the overlay is no longer shown.
>
> 6) Evaluate the new definition of `show-paren-function`.
>
> 7) Move back to the end of the long expression.
>
> 8) See that the overlay is no longer shown.
>
>
> I expected to see that the overlay would still be shown for the opening
> parenthesis that is completely unseen.
>
> I think that this happens because there is an expression `(not ... (or
> (< (length part) 4) ...))` which resolves to `nil` when the parenthesis
> is not visible and not partially visible, from what I can tell.
>
> Does this make sense?
Thanks, now fixed as you suggested, and closing the bug.