Re: Add a function that returns pixel distance between points?

[Yuan Fu]

> On Feb 3, 2021, at 10:04 AM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> Date: Tue, 02 Feb 2021 18:29:15 +0200
>> From: Eli Zaretskii <eliz@gnu.org>
>> Cc: emacs-devel@gnu.org
>> 
>>> From: Yuan Fu <casouri@gmail.com>
>>> Date: Mon, 1 Feb 2021 18:00:18 -0500
>>> Cc: emacs-devel <emacs-devel@gnu.org>
>>> 
>>> This code inserts a mini table
>>> 
>>> | looooong |
>>> | world |
>>> 
>>> And tries to aligns it to
>>> 
>>> | looooong |
>>> | world    |
>>> 
>>> You will notice there are extra white space on the right of the cells, and 
>>> the table actually looks like this:
>>> 
>>> | loooooong    |
>>> | world        |
>>> 
>>> That’s because window-text-pixel-size returned a width that’s larger than 
>>> the true with of the cells. If you enlarge the line-prefix, the extra space 
>>> grows.
>> 
>> Hmm... this sounds like some bug in window-text-pixel-size.  Let me
>> take a closer look.
> 
> It turned out the function wasn't designed to handle text that spans
> less than a single screen line.
> 
> Does the patch below fix your problems?

Yes, it worked well. Thanks!

Yuan