notepad++ startup.lua

startup.lua

local function indent_auto_detect()
	for i = 0, editor.LineCount - 1 do
		local pos = editor:PositionFromLine(i)
		local indent = editor.LineIndentPosition[i] - pos
		if indent > 0 then
			if string.byte("\t") == editor.CharAt[pos] then
				print("Indentation: Tabs")
				editor.UseTabs = true
				return
			elseif indent == 2 or indent == 3 or indent == 4 or indent == 8 then
				print("Indentation: " .. indent .. " spaces")
				editor.UseTabs = false
				editor.Indent = indent
				return
			end
		end
	end
end

npp.AddEventHandler({"OnSwitchFile", "OnReady"}, indent_auto_detect)
print("Automatic indentation detection started")
indent_auto_detect()