From: Eli Zaretskii <eliz@gnu.org>
To: Vincent Lefevre <vincent@vinc17.net>
Cc: 44284@debbugs.gnu.org
Subject: bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning
Date: Fri, 30 Oct 2020 23:09:00 +0200 [thread overview]
Message-ID: <83y2jn8lqr.fsf@gnu.org> (raw)
In-Reply-To: <20201030205702.GG27593@zira.vinc17.org> (message from Vincent Lefevre on Fri, 30 Oct 2020 21:57:02 +0100)
> Date: Fri, 30 Oct 2020 21:57:02 +0100
> From: Vincent Lefevre <vincent@vinc17.net>
> Cc: 44284@debbugs.gnu.org
>
> This is contextual. For instance, with
>
> emacs -Q -fn -misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-iso10646-1 file
>
> I have a window with 34 lines:
>
> 1
> 2
> 3
> .
> .
> .
> 33
> 34
>
> If I move the cursor downward with the down arrow, I can reach
> line 33. At line 34 (last line of the window), Emacs scrolls to
> have:
>
> 17
> 18
> 19
> .
> .
> .
> 49
> 50
>
> with the cursor on line 34. Then, with the down arrow, I can put the
> cursor on line 50, which remains the last line of the window. With
> the up arrow, I put the cursor on line 40. With the mouse wheel, I
> scroll downward (one time), then upward. I still have lines 17 to 50
> with the cursor on line 40. With the down arrow, I can reach line 49,
> but at line 50, Emacs scrolls to have lines 33 to 66, while before,
> the cursor could be on line 50 as the last line of the window.
Like I said, there's some factor at work here that needs to be
identified. Which is why I need a reproduction recipe.
Alternatively, someone else who can reproduce this are welcome to
debug this and propose analysis and/or fix.
Thanks.
next prev parent reply other threads:[~2020-10-30 21:09 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 16:36 bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning Vincent Lefevre
2020-10-28 16:44 ` Vincent Lefevre
2020-10-28 16:53 ` Eli Zaretskii
2020-10-30 10:52 ` Vincent Lefevre
2020-10-30 11:31 ` Eli Zaretskii
2020-10-30 13:33 ` Vincent Lefevre
2020-10-30 13:37 ` Eli Zaretskii
2020-10-30 16:31 ` Vincent Lefevre
2020-10-30 20:34 ` Vincent Lefevre
2020-10-30 20:57 ` Vincent Lefevre
2020-10-30 21:09 ` Eli Zaretskii [this message]
2020-10-30 23:00 ` Vincent Lefevre
2020-10-31 0:46 ` Vincent Lefevre
2020-10-31 1:13 ` Vincent Lefevre
2020-10-31 7:38 ` Eli Zaretskii
2020-10-31 22:43 ` Vincent Lefevre
2020-11-01 0:24 ` Vincent Lefevre
2020-11-01 0:28 ` Vincent Lefevre
2020-11-01 16:15 ` Eli Zaretskii
2020-11-01 16:15 ` Eli Zaretskii
2020-11-01 17:32 ` Vincent Lefevre
2020-11-01 17:43 ` Eli Zaretskii
2020-11-01 18:34 ` Vincent Lefevre
2020-11-01 18:47 ` Eli Zaretskii
2020-11-01 21:13 ` Vincent Lefevre
2020-11-07 8:29 ` Eli Zaretskii
2020-11-07 10:35 ` Vincent Lefevre
2020-11-07 13:22 ` Eli Zaretskii
2020-11-01 15:55 ` Eli Zaretskii
2020-11-01 17:26 ` Vincent Lefevre
2020-10-30 20:58 ` Eli Zaretskii
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