Subject: bug#29002: it.first_visible_x is erroneously 0 while horizontal scrolling.

From: Eli Zaretskii <[email-masked]>
Date: Mon, 30 Oct 2017 20:02:27 +0200

> Date:  Sun, 29 Oct 2017 13:12:15 -0700
> From:  Keith David Bershatsky <[email-masked]>
> Cc:  [email-masked]
> 
> It appears to me that (scroll-right 1) is kind of a temporary form of horizontal scrolling, which automatically cancels as to non-current lines in a vareity of situations when keyboard input is received.  Plain old scroll-right without the optional distance argument is semi-permanent, and non-current lines do not automatically return to a non-scrolled state.

Yes, it's temporary.  For a permanent hscroll, you need to invoke
scroll-left/right with its second argument non-nil (which happens
automatically in interactive invocation).

Does the hscroll get reset after moving cursor if you type "M-x"?