From: Eli Zaretskii <eliz@gnu.org>
To: Yuan Fu <casouri@gmail.com>
Cc: 43469@debbugs.gnu.org
Subject: bug#43469: 28.0.50; window-text-pixel-size returns incorrect value when line-prefix is set
Date: Fri, 18 Sep 2020 22:22:17 +0300 [thread overview]
Message-ID: <835z8a51qu.fsf@gnu.org> (raw)
In-Reply-To: <97950C21-6F10-4E4C-8854-BA64C023B9D6@gmail.com> (message from Yuan Fu on Fri, 18 Sep 2020 13:05:15 -0400)
> From: Yuan Fu <casouri@gmail.com>
> Date: Fri, 18 Sep 2020 13:05:15 -0400
> Cc: 43469@debbugs.gnu.org
>
> >> (progn (insert "xxxxxxxxxxxxxx")
> >> (print (car (window-text-pixel-size
> >> nil (line-beginning-position) (line-end-position))))
> >> (put-text-property (line-beginning-position) (line-end-position)
> >> 'line-prefix " ")
> >> (print (car (window-text-pixel-size
> >> nil (line-beginning-position) (line-end-position)))))
> >>
> >> Prints first 98, then 119
> >
> > Why do you think this is a bug?
>
> I thought the pixel width shouldn’t include the line-prefix?
It should. From the function's doc string:
This function exists to allow Lisp programs to adjust the dimensions
of WINDOW to the buffer text it needs to display.
When you want to know how wide a window you need for displaying some
text, you do want the line-prefix part accounted for.
next prev parent reply other threads:[~2020-09-18 19:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-17 16:03 bug#43469: 28.0.50; window-text-pixel-size returns incorrect value when line-prefix is set Yuan Fu
2020-09-17 17:32 ` Eli Zaretskii
2020-09-18 17:05 ` Yuan Fu
2020-09-18 19:22 ` Eli Zaretskii [this message]
2020-09-19 18:33 ` Yuan Fu
2020-09-19 18:56 ` Eli Zaretskii
2020-09-19 18:33 ` bug#43469: Fwd: " Yuan Fu
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