GNU bug report logs - #52676
28.0.50; [PATCH] Rationalize window-text-pixel-size

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Message #10 received at 52676-done <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: dick <dick.r.chiang <at> gmail.com>
Cc: 52676-done <at> debbugs.gnu.org
Subject: Re: bug#52676: 28.0.50; [PATCH] Rationalize window-text-pixel-size
Date: Mon, 20 Dec 2021 11:26:32 +0800

dick <dick.r.chiang <at> gmail.com> writes:

> Even if 43c4cc2 did anything (it doesn't), it was obviously the wrong
> way to go about it.

On the contrary, it does.  The pixel-scrolling code works on a line with
a line-prefix because of it.

> +	    (car (window-text-pixel-size
> +                  nil (line-beginning-position) (line-end-position)))))))))

This suggests that it will not work for the usecase that the option was
intended to support, because the position `line-beginning-position'
might not be on the start of the visual line.  Trust me, I tried quite a
few options including precisely this before implementing this option.

Closing.

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