Ruler doesn't update properly in horizontal split

[hedyhli]

Problem

When using laststatus=0 and cmdheight=1, the ruler does not update in horizontal split, but does update for vertical splits.

Config:

vim.opt.laststatus = 0
vim.opt.statusline = "---"
vim.opt.rulerformat = "%20(%f %p%%%)"
vim.opt.cmdheight = 1

-- For easier navigation in demo
vim.keymap.set("n", "<C-h>", "<C-w>h")
vim.keymap.set("n", "<C-l>", "<C-w>l")
vim.keymap.set("n", "<C-k>", "<C-w>k")
vim.keymap.set("n", "<C-j>", "<C-w>j")

Screen recording:

nvim-ruler.mov

I'm currently on nvim 0.9:

NVIM v0.9.4
Build type: Release
LuaJIT 2.1.1692716794

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/local/share/nvim"

Run :checkhealth for more info

Steps to reproduce

1. Save the config from above somewhere
2. Run nvim with nvim -u the-config.lua
3. Open horizontal split for any file
4. See how the ruler updates correctly for newly opened buffer, but when cursor is at the previous buffer, it still shows the ruler as if cursor was in the new buffer

If you close the new buffer, it works correctly again.

This is not a problem in vertical splits.

Expected behavior

The ruler should update based on the buffer the cursor is in, regardless of vertical/horizontal splits.

From :help ruler:

					 *'ruler'* *'ru'* *'noruler'* *'noru'*
'ruler' 'ru'		boolean	(default on)
			global
	Show the line and column number of the cursor position, [...]

To my understanding it's basically like statusline which also updates based on cursor position.

Neovim version (nvim -v)

0.9.4

Vim (not Nvim) behaves the same?

Actually vim doesn't show the ruler at all with this config.

Operating system/version

macOS 13

Terminal name/version

kitty

$TERM environment variable

xterm-256color

Installation

app image from github release

[zeertzjq]

The help also says:

	the last line of the screen.  If the statusline is given by
	'statusline' (i.e. not empty), this option takes precedence over
	'ruler' and 'rulerformat'.

So this is working as intended.

[hedyhli]

Completely missed the fact that with horizontal splits the statusline is used which takes over the ruler... oops