fix: Formatting and addition/disable of folding visualization in the new

statuscolumn

nvim/lua/statuscolumn.lua

@@ -4,7 +4,33 @@ statuscolumn.border = function ()
     return '│'
 end
 
-statuscolumn.numbers = function (config)
+statuscolumn.folds = function()
+    local foldlevel = vim.fn.foldlevel(vim.v.lnum)
+    local foldlevel_before = vim.fn.foldlevel((vim.v.lnum - 1) >= 1 and vim.v.lnum - 1 or 1)
+    local foldlevel_after = vim.fn.foldlevel((vim.v.lnum + 1) <= vim.fn.line('$') and (vim.v.lnum + 1) or vim.fn.line('$'))
+
+    local foldclosed = vim.fn.foldclosed(vim.v.lnum)
+
+    if foldlevel == 0 then
+        return ' '
+    end
+
+    if foldclosed ~= -1 and foldclosed == vim.v.lnum then
+        return '▶'
+    end
+
+    if foldlevel > foldlevel_before then
+        return '▽'
+    end
+
+    if foldlevel > foldlevel_after then
+        return '╰'
+    end
+
+    return '╎'
+end
+
+statuscolumn.numbers = function()
     return string.format('%-3s %2s ', vim.v.lnum, vim.v.relnum)
 end
 
@@ -15,6 +41,7 @@ statuscolumn.statusColumn = function()
         '%s',
         statuscolumn.numbers(),
         statuscolumn.border(),
+        -- statuscolumn.folds(), ' ',
     })
 
     return column_text