Display a list of numbers to choose from.

fzf-numbers.vim

vim9script
##                   ##
# ::: Fzf Numbers ::: #
##                   ##

#
# Display a list of numbers to choose from.
#

#
# How to use
# ----------
# 1. Create the `data.txt` file with the command: `seq 1 100000 > data.txt`;
# 2. Run Vim with the command: `vim -S fzf-numbers.vim`;
# 3. In the Vim command line run the command: `FzfNumbers`;
# 4. In the pop-up window, observe the error message: `executing job failed: Argument list too long`;
# (5). Close the pop-up window with the `ZZ` hotkey.
#

echomsg 'Fzf Numbers has been loaded!'

var tmp_file: string = tempname()

var width: number = (&columns * 0.8)->ceil()->float2nr()
var height: number = (&lines * 0.8)->ceil()->float2nr()

var command = [
  'fzf',
  '--expect=esc,enter'
]

var popup_options = {
  minwidth: width,
  minheight: height,
  title: '─{{{ Fzf Numbers }}}─',
  border: [1, 1, 1, 1],
  borderchars: ['─', '│', '─', '│', '┌', '┐', '┘', '└'],
}

def ExitCallback(job: job, status: number): void
  execute('quit')
enddef

def CloseCallback(channel: channel): void
  var [key, value] = readfile(tmp_file)

  delete(tmp_file)

  if key == 'enter'
    echomsg value
  else
    echomsg '∅'
  endif
enddef

var term_options = {
  'hidden': true,
  'out_io': 'file',
  'out_name': tmp_file,
  # 'exit_cb': ExitCallback,
  'close_cb': CloseCallback
}

def FzfNumbers(): void
  var fzf_default_command = $FZF_DEFAULT_COMMAND

  var data = readfile('data.txt')->filter((_, v) => v->str2nr() % 2 == 0)->join('\n')

  $FZF_DEFAULT_COMMAND = $"echo '{data}'"

  try
    term_start(command, term_options)->popup_create(popup_options)
  finally
    $FZF_DEFAULT_COMMAND = fzf_default_command
  endtry
enddef

command FzfNumbers FzfNumbers()