--- Begin Message ---
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Subject: |
26.0.50; display bugs with auto-hscolling current line |
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Date: |
Fri, 19 May 2017 11:36:40 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) |
0. emacs -Q
1. Make a long (> 160 columns) line of text, e.g. in *scratch* join the
two lines and duplicate them: C-p C-p M-^ C-a C-k C-y C-y
2. Copy this long line and yank it below (optional, just to see the
effect of auto-hscrolling clearly): C-a C-k C-y RET C-y
3. M-x toggle-truncate-lines
4. M-x customize-option RET auto-hscroll-mode, set value to "Scroll only
the current line" and set it for the current session.
5. Return to *scratch* and put point at the start: M-<. Enable
column-number-mode to track the column of point:
6. Start moving point forward, e.g by repeating M-f. On moving over
the first occurrence of "create", this line (but not the one below
it) is scrolled, correctly. Continue repeating M-f.
=> When point reached column 160 (for me that's the space after the
second occurrence of ";; This buffer is"), the cursor is visible, but
the next M-f makes it disappear and the line no longer scrolling;
however, you can see from the column number in the mode line that
point keeps advancing.
When scrolling stops depends, AFAICT, on (one or both of) the
window-width and the font size.
A second, likely related, display bug happens in combination with
text-scale-adjust:
7. Return to BOB (M-<). Invoke increased text-scale-adjust (C-x C-+)
and start moving forward by repeating M-f.
=> At some point (for me at column 130), while advancing point
columnwise (C-f) the line also moves pixelwise to the left and then
(after 3-4 pixels) jumps back. Continuing with C-f repeats this
effect.
With decreased text-scale-adjust (C-x C--, making sure the size is
below the default, not just returned to it), the mirror-image effect
happens (for me, starting at column 176 with the smaller size): the
line moves pixelwise to the right and after several pixels jumps back
to the left, and so on.
When the default size is restored, the pixelwise movement stops (but
the above hscrolling problem remains).
In GNU Emacs 26.0.50 (build 7, x86_64-pc-linux-gnu, GTK+ Version 3.22.8)
of 2017-05-19 built on rosalinde
Repository revision: bb5c6614eb171eef8c08474e0f949fe18ef4b230
Windowing system distributor 'The X.Org Foundation', version 11.0.11901000
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--- End Message ---
--- Begin Message ---
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Subject: |
Re: bug#26994: 26.0.50; display bugs with auto-hscolling current line |
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Date: |
Sat, 20 May 2017 16:36:34 +0300 |
> From: Stephen Berman <address@hidden>
> Cc: address@hidden
> Date: Sat, 20 May 2017 14:25:45 +0200
>
> > Thanks, should be fixed now.
>
> Confirmed, thanks!
Thanks, closing.
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