function! CreateCenteredFloatingWindow()

let width = min([&columns - 4, max([80, &columns - 20])])

let height = min([&lines - 4, max([20, &lines - 10])])

let top = ((&lines - height) / 2) - 1

let left = (&columns - width) / 2

let opts = {'relative': 'editor', 'row': top, 'col': left, 'width': width, 'height': height, 'style': 'minimal'}

let top = "╭" . repeat("─", width - 2) . "╮"

let mid = "│" . repeat(" ", width - 2) . "│"

let bot = "╰" . repeat("─", width - 2) . "╯"

let lines = [top] + repeat([mid], height - 2) + [bot]

let s:buf = nvim_create_buf(v:false, v:true)

call nvim_buf_set_lines(s:buf, 0, -1, v:true, lines)

call nvim_open_win(s:buf, v:true, opts)

set winhl=Normal:Floating

let opts.row += 1

let opts.height -= 2

let opts.col += 2

let opts.width -= 4

call nvim_open_win(nvim_create_buf(v:false, v:true), v:true, opts)

au BufWipeout <buffer> exe 'bw '.s:buf

function! Openrc()

let l:buf = CreateCenteredFloatingWindow()

call nvim_set_current_buf(l:buf)

execute 'e $MYVIMRC'

function! Open_popup() abort

let height = min([&lines - 4, max([20, &lines - 10])])

let height -= 2

let width = min([&columns - 4, max([80, &columns - 20])])

let width -= 4

let top = ((&lines - height) / 2) - 1

let left = (&columns - width) / 2

let row = top

let row += 1

let col = left

let col += 2

let opts = {

\ 'line': row,

\ 'col': col,

\ 'maxwidth': width,

\ 'minwidth': width,

\ 'maxheight': height,

\ 'minheight': height,

\ 'border': [1, 1, 1, 1],

\ 'borderchars': ['─', '│', '─', '│', '┌', '┐', '┘', '└'],

\ 'borderhighlight': ['FloatermBorder'],

\ 'padding': [0,1,0,1],

\ 'highlight': 'Floaterm'

\ }

let winid = popup_create(a:bufnr, opts)

call setbufvar(a:bufnr, '&filetype', 'floaterm')

return winid