GNU bug report logs - #24169
25.1.50; Line numbers disappear when horizontally scrolled

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Message #11 received at 24169 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 24169 <at> debbugs.gnu.org, ivan <ivan.brennan <at> gmail.com>
Subject: Re: bug#24169: 25.1.50;
 Line numbers disappear when horizontally scrolled
Date: Sat, 6 Aug 2016 13:52:06 -0400

On Sat, Aug 6, 2016 at 1:47 PM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>> From: ivan <ivan.brennan <at> gmail.com>
>> Date: Sat, 6 Aug 2016 12:02:09 -0400
>>
>> Using linum-mode displays line numbers to the left of the left fringe. I would expect them to remain visible
>> regardless of any horizontal scrolling, since that's how the left fringe behaves (not to mention numerous other
>> editors and applications). However, when using line-truncation, the line numbers disappear when the text is
>> horizontally scrolled. I think this is worth fixing, because it would be more useful and look better (the dead
>> space takes up screen real-estate and makes me sad).
>
> It's a bug in the design of linum-mode: it puts the overlay that
> displays the line numbers on the first character of each line.  So
> when that first character is not displayed, the overlay is not shown
> either.
>
> A possible fix would be to move the overlay to the first visible
> character after the horizontal scroll.  Patches welcome.

Wouldn't it be simpler to put the overlay over the whole line, so it
doesn't need to be moved?

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