trainingproject/node_modules/simple-terminal-menu/simple-terminal-menu.js

A module to teach you how to module.

const tmenu        = require('extended-terminal-menu')
    , path         = require('path')
    , fs           = require('fs')
    , xtend        = require('xtend')
    , wcstring     = require('wcstring')
    , chalk        = require('chalk')

const maxListenersPerEvent = 10

process.stdin.pause()

function repeat (ch, sz) {
  return new Array(sz + 1).join(ch)
}

function applyTextMarker (truncate, width, text, marker) {
  var availableSpace = width - wcstring(marker).size()
  var wText = wcstring(text)

  if (availableSpace < wText.size()) {
    text = wText.truncate(availableSpace, truncate)
  } else {
    text += repeat(' ', availableSpace - wText.size())
  }
  return text + marker
}

function createMenu (opts) {

  if (!process.stdin.isTTY)
    return null

  opts = xtend({
      separator: '\u2500'
    , truncate: '...'
  }, opts)

  var menu = tmenu(opts)
    , _add = menu.add.bind(menu)
    , _close = menu.close.bind(menu)
    , txtMarker = applyTextMarker.bind(null, opts.truncate, menu.width)
    , menuStream

  menu.entryCount = 0

  menu.addItem = function (item) {
    menu.add(item.label, item.marker, item.handler)
  }

  menu.add = function (label, marker, cb) {
  	if (typeof marker == 'function') {
  		cb = marker
  		marker = null
  	}
    menu.entryCount += 1
    menu.setMaxListeners(menu.entryCount * maxListenersPerEvent)
    _add(txtMarker(label, marker || ''), function () {
      if (typeof cb === 'function')
        cb(label, marker)
    })
  }

  menu.writeLine = function (label, marker) {
    menu.write(txtMarker(label, marker || '') + '\n')
  }

  menu.writeSeparator = function () {
  	menu.write(repeat(opts.separator, menu.width) + '\n')
  }

  menu.writeTitle = function (title) {
    menu.writeLine(chalk.bold(title))
  }

  menu.writeSubtitle = function (subtitle) {
    menu.writeLine(chalk.italic(subtitle))
  }

  menu.close = function () {
    menu.y = 0
    menu.reset()
    _close()
    close()
  }

  menu.reset()

  function passDataToMenu (data) {
    // Node 0.10 fix
    menuStream.write(data)
  }

  function close() {
    process.stdin.pause()
    process.stdin.removeListener('data', passDataToMenu)
    menuStream.unpipe(process.stdout)
    process.stdin.unpipe(menuStream)
    process.stdin.setRawMode(false)
  }

  menu.on('select', menu.close.bind(menu))

  menuStream = menu.createStream()
  process.stdin
    .on("data", passDataToMenu)

  menuStream.pipe(process.stdout, {end: false})
  menuStream.on('end', close)
  process.stdin.setRawMode(true)
  process.stdin.resume()

  return menu
}


module.exports = createMenu