lite-xl/data/plugins/lineguide.lua

-- mod-version:3 -- lite-xl 2.1
local config = require "core.config"
local style = require "core.style"
local DocView = require "core.docview"
local CommandView = require "core.commandview"

local draw_overlay = DocView.draw_overlay

function DocView:draw_overlay(...)
  if not self:is(CommandView) then
    local offset = self:get_font():get_width("n") * config.line_limit
    local x = self:get_line_screen_position(1) + offset
    local y = self.position.y
    local w = math.ceil(SCALE * 1)
    local h = self.size.y

    local color = style.guide or style.selection
    renderer.draw_rect(x, y, w, h, color)
  end
  draw_overlay(self, ...)
end