cursor drawn on command-line when 'smoothscroll' is enabled

[lacygoill]

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.

[brammool]

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

[lacygoill]

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.

[lacygoill]

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)

[lacygoill]

[lacygoill]

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
)

[brammool]

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.

…

-- From "know your smileys": (\___/) (+'.'+) Bunny (")_(") /// Bram Moolenaar -- ***@***.*** -- http://www.Moolenaar.net \\\ /// \\\ \\\ sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ /// \\\ help me help AIDS victims -- http://ICCF-Holland.org ///

[brammool]

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

[lacygoill]

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