Toggle Linewise Keymap For Insert Mode

[KirkaigDev]

Took me far too long to get something that worked (too many different ways to get the column number) but through trial and error I finally created a linewise keymap for insert mode that keeps track of the cursor location. Also works for blockwise only comments such as css.

vim.keymap.set("i", "<C-/>", function()
	local ft_api = require("Comment.ft")

	vim.cmd("stopinsert")
	local column = vim.fn.virtcol(".")
	local char_count_before = vim.fn.virtcol("$") - 1

	vim.cmd("normal! " .. api("toggle.linewise.current", "g@$")())

	local char_count_after = vim.fn.virtcol("$") - 1

	local updated_column = 0
	if (ft_api.get(vim.bo.filetype)[1] == ft_api.get(vim.bo.filetype)[2]) then
		updated_column = ((char_count_after - char_count_before) / 2) + column
	else
		updated_column = (char_count_after - char_count_before) + column
	end

	local insert_key = "a"
	if (updated_column == 1) then
		insert_key = "i"
	else
		updated_column = updated_column - 1
	end
	vim.api.nvim_feedkeys(tostring(updated_column) .. "|" .. insert_key, "n", false)
end, { desc = "toggle single line comments" })

Some terminals aren't great with ctrl + / so you might want to change the mapping.