-- Terminal cursor shapes (Vim t_SI / t_EI / t_SR). Many Neovim builds no longer define these; pcall skips safely.

local esc = '\27'

local function set_termcap(name, value)
  pcall(function()
    vim.o[name] = value
  end)
end

if vim.env.TMUX then
  set_termcap('t_SI', esc .. 'Ptmux;' .. esc .. esc .. '[6 q' .. esc .. '\\')
  set_termcap('t_EI', esc .. 'Ptmux;' .. esc .. esc .. '[2 q' .. esc .. '\\')
else
  set_termcap('t_SI', esc .. '[6 q') -- insert: bar
  set_termcap('t_EI', esc .. '[2 q') -- normal: block
end

set_termcap('t_SR', esc .. '[4 q') -- replace: underline

-- Modern Neovim uses guicursor for mode shapes (also in many terminals/UIs).
-- Keep operator-pending block so d/c don't look like replace mode.
vim.opt.guicursor = 'n-v-c-sm:block,i-ci-ve:ver25,r-cr:hor20,o:block'