NewTmpFile.vim

scriptencoding utf-8

" input() のときに getcmdline() で取得できる技

function! NewTmpFile() abort
    let l:winid =  popup_create('', {
    \   'padding': [1, 1, 1, 1],
    \   'minwidth': 20,
    \   'line': 'cursor-1',
    \   'col': 'cursor+3',
    \})

    redraw
    let l:timer = timer_start(30, funcref('s:timer_callback', [l:winid]), { 'repeat': -1 })

    let l:ft = call('input', ['>>> ', '', 'filetype'])

    let s:tmp = tempname()
    " もし、空ならそのバッファに表示
    if line('$') == 1 && getline(1) ==# ''
        exec 'e '.s:tmp
    else
        exec 'new '.s:tmp
    endif
    exec 'set ft='.l:ft

    call timer_stop(l:timer)
    call popup_close(l:winid)
endfunction

function! s:timer_callback(winid, ...) abort
    let l:query = getcmdline()
    call win_execute(a:winid, printf("call setline(1, 'FileType: %s')", l:query))
    " redraw は必要！
    redraw
endfunction

call NewTmpFile()