Tabline doesn't fade on focus lost when `enablefocusfading` is set?

[shyun3]

Hello, I have enablefocusfading set to true and I would have expected that the tabline gets faded when Neovim loses focus but that doesn't seem to be happening. I saw that 'TabLineSel' is specified as a highlight group in the default blocklist, but no other part of the tabline gets faded.

Here's my repro.lua:

local root = vim.fn.fnamemodify("./.repro", ":p")

-- set stdpaths to use .repro
for _, name in ipairs({ "config", "data", "state", "cache" }) do
  vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system({
    "git",
    "clone",
    "--filter=blob:none",
    "--single-branch",
    "https://github.com/folke/lazy.nvim.git",
    lazypath,
  })
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
  -- add any other pugins here
  {
    "tadaa/vimade",
    opts = { enablefocusfading = true },
  },
}
require("lazy").setup(plugins, {
  root = root .. "/plugins",
})

Focused:

Not focused:

[TaDaa]

nice find! this is due to this line here:

vimade/lua/vimade/fader.lua

Line 28 in d13dab9

local windows = vim.api.nvim_tabpage_list_wins(0)

needs to be updated to support checking the active window in other tabs or something similar

[TaDaa]

I think this update should fix it and provide better defaults. You'll need to remove the default blocklist highlights override if you still have it, but:

• Inactive tabs will now fade by default.
• TabLineSel will fade when enablefocusfading is enabled and the editor has lost focus.

Please let me know how that goes and if you are still seeing issues!

[shyun3]

I can confirm that inactive tabs are now faded, but I'm seeing no change with the active tab when losing focus.

Focused:

Not focused:

I'm using the same repro.lua as in the OP.

[TaDaa]

hmm interesting! so in the repro this is due to a quirk with TabLineSel (and maybe some other builtin highlights - needs testing), it seems like when a namespace is set, this particular highlight stops inheriting fg/bg from Normal despite working that way in the global namespace.

However, this shouldn't be an issue for most colorschemes or if you manually set a guifg on TabLineSel

try hi TabLineSel guifg=#EEEEEE and it should work fine, still worth looking into more and resolving though

[shyun3]

Yes, that worked.

I noticed that only the tabs themselves get faded, not the rest of the line off to the right. Is there a way the whole line can be faded on focus lost, kinda like what happens for the statusline?