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bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t
From: |
ynyaaa |
Subject: |
bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t |
Date: |
Mon, 08 Feb 2021 00:28:57 +0900 |
Eli Zaretskii <eliz@gnu.org> writes:
> tags 46316 notabug
> thanks
>
>> From: ynyaaa@gmail.com
>> Date: Fri, 05 Feb 2021 14:08:06 +0900
>>
>>
>> (1) When isearch fails after last match
>> Evaluate the form below and type 'C-s a C-s', then emacs messages
>> 'Failing I-search: a' and the buffer scrolls back left and the current
>> point is out of the window.
>> Type C-s again, and overwrapped search succeeds at the same point,
>> but the matched point is still out of the window.
>>
>> (let ((buf (generate-new-buffer "tmp")))
>> (switch-to-buffer buf)
>> (setq truncate-lines t)
>> (dotimes (i 100) (insert (format "%d\n" i)))
>> (insert-char ?x 200)
>> (insert ?a)
>> (goto-char (point-min)))
>>
>> (2) When image-toggle-display
>> Evaluate the form below, then the SVG image is displayed.
>> Type 'C-c C-c' to view the source text and type 'C-c C-c' again to view
>> the image, then the buffer keeps scrolled right and the image is hidden
>> out of the window.
>> Type C-a and the image is shown, type 'C-c C-c' to view the source text
>> again, then the buffer keeps scrolled left and the current point is out
>> of the window.
>>
>> (let ((buf (generate-new-buffer "tmp"))
>> (svg "<svg width=\"80\" height=\"80\" version=\"1.1\"\
>> xmlns=\"http://www.w3.org/2000/svg\"\
>> xmlns:xlink=\"http://www.w3.org/1999/xlink\">\
>> <rect width=\"80\" height=\"80\" x=\"0\" y=\"0\" fill=\"blue\"></rect>\
>> </svg>"))
>> (switch-to-buffer buf)
>> (setq truncate-lines t)
>> (insert svg)
>> (image-mode))
>
> I don't think this behavior is a bug. We only change the hscroll of a
> window when point moves, and in these two scenarios it doesn't move.
> I see no reason to assume that the user will necessarily want to have
> the window scroll, instead of keeping it at its current horizontal
> scroll.
In the case of isearch, the hscroll is changed without point motion
when isearch fails.
In the case of image-toggle-display, the hscroll is changed without
point motion when typing 'C-c C-c' for the first time.
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, ynyaaa, 2021/02/05
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, Eli Zaretskii, 2021/02/06
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t,
ynyaaa <=
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, Eli Zaretskii, 2021/02/07
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, ynyaaa, 2021/02/07
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, Eli Zaretskii, 2021/02/07
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, ynyaaa, 2021/02/12
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, Eli Zaretskii, 2021/02/13
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, ynyaaa, 2021/02/14
- bug#46316: 27.1; wrong horizontal scroll with truncate-lines value t, Eli Zaretskii, 2021/02/14