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bug#55193: 29.0.50; Double-buffering on MS-Windows freezes cursor in min
From: |
Po Lu |
Subject: |
bug#55193: 29.0.50; Double-buffering on MS-Windows freezes cursor in minibuffer |
Date: |
Sat, 30 Apr 2022 18:55:24 +0800 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.91 (gnu/linux) |
Eli Zaretskii <eliz@gnu.org> writes:
> The new double-buffering feature on MS-Windows causes unpleasant side
> effect when the user types something into the minibuffer, then presses
> RET to submit and exit the minibuffer. Without double-buffering, the
> cursor moves to the beginning of the minibuffer, thus providing visual
> feedback that whatever the user typed was submitted. With
> double-buffering turned on, the cursor "freezes" in its last position,
> at the end of the minibuffer text, until the command finishes and
> redisplay does its job. Which could be a tangible amount of time,
> during which Emacs looks "frozen".
>
> To reproduce:
>
> emacs -Q
> M-x blink-cursor-mode RET
> C-x C-f src/xdisp.c RET
>
> Observe that the cursor is at the end of the file name until such time
> as xdisp.c is displayed, which could be a second or two in a
> non-optimized build of Emacs.
>
> Can this be avoided, please, i.e. can we update the display after the
> cursor is moved?
Thanks, should be fixed now.