nvim: make nvim-ufo use statuscolumn (pretty)

modules/programs/nvim/init.lua

@@ -145,6 +145,34 @@ vim.o.foldcolumn = "1" -- '0' is not bad
 vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
 vim.o.foldlevelstart = 99
 vim.o.foldenable = true
+vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]
+vim.o.statuscolumn = "%= "
+  -- FIXME: figure out how to put on the other side without having to do a lot of shifting
+  .. "%s" -- sign column
+  .. "%{%" -- evaluate this, and then evaluate what it returns
+  .. "&number ?"
+  .. "(v:relnum ?"
+  -- when showing relative numbers, make sure to pad so things don't shift as you move the cursor
+  .. 'printf("%"..len(line("$")).."s", v:relnum)'
+  .. ":"
+  .. "v:lnum"
+  .. ")"
+  .. ":"
+  .. '""'
+  .. " " -- space between lines and fold
+  .. "%}"
+  .. "%= "
+  .. "%#FoldColumn#" -- highlight group for fold
+  .. "%{" -- expression for showing fold expand/colapse
+  .. "foldlevel(v:lnum) > foldlevel(v:lnum - 1)" -- any folds?
+  .. "? (foldclosed(v:lnum) == -1" -- currently open?
+  .. '? ""' -- point down
+  .. ':  ""' -- point to right
+  .. ")"
+  .. ': " "' -- blank for no fold, or inside fold
+  .. "}"
+  .. "%= " -- spacing between end of column and start of text
+
 -- Using ufo provider need remap `zR` and `zM`. If Neovim is 0.6.1, remap yourself
 wk.register({
   z = {