[vim/vim] cursor drawn on command-line when 'smoothscroll' is enabled (Issue #11288)

lacygoill

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Oct 5, 2022, 2:39:38 AM10/5/22

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Steps to reproduce

Run this shell command:

vim -Nu NONE -S <(tee <<'EOF'
    vim9script
    &smoothscroll = true
    &wrap = true
    &lines = 24
    vsplit
    var text: string = 'the quick brown fox jumps over the lazy dog '
    [text->repeat(&columns / text->strcharlen() + 1)]->repeat(&lines)->setline(1)
    feedkeys('j'->repeat(&lines), 'xnt')
EOF
)

The cursor is drawn on the command-line, below the statusline .

Expected behavior

The cursor is drawn on the last line of the buffer, above the statusline.

Version of Vim

9.0 Included patches: 1-662

Environment

Operating system: Ubuntu 20.04.5 LTS
Terminal: XTerm(353)
Value of $TERM: xterm-256color
Shell: GNU bash, version 5.0.17

Gif

Additional context

The issue disappears if we reset 'smoothscroll'.

The issue seems to be influenced by &lines. For example, I can't reproduce when &lines = 10; but I can when &lines = 24.

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Bram Moolenaar

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Oct 5, 2022, 3:25:06 PM10/5/22

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I tried this and a few variants, but I cannot reproduce.

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lacygoill

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Oct 5, 2022, 7:47:12 PM10/5/22

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I'm on 9.0.669 and I can still reliably reproduce. But as mentioned earlier, it depends on the number of lines. For me, it works with 24 lines.

I wonder whether the font size also affects the issue. I can reproduce in xterm, with no config:

$ xrdb /dev/null
$ xterm
$ HOME=/tmp vim -Nu NONE -i NONE -U NONE -S <(tee <<'EOF'
    vim9script
    &smoothscroll = true
    &wrap = true
    &lines = 24
    vsplit
    var text: string = 'the quick brown fox jumps over the lazy dog '
    [text->repeat(&columns / text->strcharlen() + 1)]->repeat(&lines)->setline(1)
    feedkeys('j'->repeat(&lines), 'xnt')
EOF
)

I press C-X C-E in xterm to paste the last multiline shell command inside a Vim buffer, then ZZ to run it.

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lacygoill

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Oct 5, 2022, 7:56:49 PM10/5/22

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Also, if we maintain l pressed, the cursor:

moves forward till the vertical bar
gets back to the beginning
moves forward till the vertical bar again
moves 8 cells forward (and stops there)

That's with &columns = 80. With &columns = 100, something similar happens; the cursor:

moves forward till the vertical bar
gets back to the beginning
moves forward till the vertical bar again
moves 32 cells forward (and stops there)

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lacygoill

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Oct 5, 2022, 7:58:01 PM10/5/22

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lacygoill

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Oct 5, 2022, 9:12:38 PM10/5/22

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The number of columns also affects the issue. 80 columns and 24 lines works for me:

HOME=/tmp vim -Nu NONE -i NONE -U NONE -S <(tee <<'EOF'
    vim9script
    &smoothscroll = true
    &wrap = true
    &lines = 24
    &columns = 80
    vsplit
    var text: string = 'the quick brown fox jumps over the lazy dog '
    [text->repeat(&columns / text->strcharlen() + 1)]->repeat(&lines)->setline(1)
    feedkeys('j'->repeat(&lines), 'xnt')
EOF
)

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Bram Moolenaar

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Oct 6, 2022, 7:41:29 AM10/6/22

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> I'm on 9.0.669 and I can still reliably reproduce. But as mentioned earlier, it depends on the number of lines. For me, it works with 24 lines.
>
> I wonder whether the font size also affects the issue. I can reproduce in xterm, with no config:
>
> $ xrdb /dev/null
> $ xterm

> $ HOME=/tmp vim -Nu NONE -i NONE -U NONE -S <(tee <<'EOF'

> vim9script
> &smoothscroll = true
> &wrap = true
> &lines = 24
> vsplit
> var text: string = 'the quick brown fox jumps over the lazy dog '
> [text->repeat(&columns / text->strcharlen() + 1)]->repeat(&lines)->setline(1)
> feedkeys('j'->repeat(&lines), 'xnt')
> EOF
> )
>

> I press `C-X C-E` in xterm to paste the last multiline shell command
> inside a Vim buffer, then `ZZ` to run it.

Ah, I need to set 'scrolloff' to zero for this to happen.
Might be a duplicate of #11269.

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Bram Moolenaar

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Oct 6, 2022, 10:14:36 AM10/6/22

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I expect this to be fixed by patch 9.0.0671, please check.

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lacygoill

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Oct 6, 2022, 2:21:43 PM10/6/22

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Yes, it is fixed as of Vim 9.0.0676, so closing.

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lacygoill

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Oct 6, 2022, 2:21:45 PM10/6/22

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Closed #11288 as completed.

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