Inverting colors between buffers and tab numbers

[Iron-E]

The bar's background color also changes, from when there are only buffers (and no tabs open):

Is that intended?

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Originally posted by @Iron-E in #22 (comment)

Making a new issue for this as requested. I currently have my eyes on this range as a potential problem area (although I don't really know for sure):

if layout.tabpages_width > 0 then
    result = result .. '%=%#BufferTabpages# ' .. tostring(current_tabpage) .. '/' .. tostring(total_tabpages) .. ' '
end

-- vim.g.layout = {
--   scroll = state.scroll,
--   max_scroll = max_scroll,
--   layout = layout,
--   needed_width = needed_width,
--   accumulated_width = accumulated_width,
-- }

result = result .. hl('TabLineFill')

I think this because when you change the %=% to something like %foo%, the bar comes back at the end:

I'm admittedly unfamiliar with tabline syntax though.

[romgrk]

%= is an alignment marker. What color do you want the filling to be? What's the output of hi BufferSignInactive?

[Iron-E]

I'd like the filling to remain the same as when there is only one tab (and also when there are multiple tabs on HEAD~7), or be customizable.

The second screenshot shows this (don't mind the purple bar, that's i3wm):

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When I run:

hi BufferSignInactive

it says the group hasn't been defined yet.

Edit: and if I link the group to Error (or something like that) nothing appears to change.

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Edit 2: We got the name of the group wrong. Here's the output:

BufferInactiveSign xxx guifg=#505050 guibg=#505050

If I change that highlight group, this happens:

Should we make another highlight group?