Palak Handa / startUpJalsa-Backend

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node_modules/mute-stream/mute.js 3.27 KB
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f7563de62   Palak Handa   first commit 
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  var Stream = require('stream')
  
  module.exports = MuteStream
  
  // var out = new MuteStream(process.stdout)
  // argument auto-pipes
  function MuteStream (opts) {
    Stream.apply(this)
    opts = opts || {}
    this.writable = this.readable = true
    this.muted = false
    this.on('pipe', this._onpipe)
    this.replace = opts.replace
  
    // For readline-type situations
    // This much at the start of a line being redrawn after a ctrl char
    // is seen (such as backspace) won't be redrawn as the replacement
    this._prompt = opts.prompt || null
    this._hadControl = false
  }
  
  MuteStream.prototype = Object.create(Stream.prototype)
  
  Object.defineProperty(MuteStream.prototype, 'constructor', {
    value: MuteStream,
    enumerable: false
  })
  
  MuteStream.prototype.mute = function () {
    this.muted = true
  }
  
  MuteStream.prototype.unmute = function () {
    this.muted = false
  }
  
  Object.defineProperty(MuteStream.prototype, '_onpipe', {
    value: onPipe,
    enumerable: false,
    writable: true,
    configurable: true
  })
  
  function onPipe (src) {
    this._src = src
  }
  
  Object.defineProperty(MuteStream.prototype, 'isTTY', {
    get: getIsTTY,
    set: setIsTTY,
    enumerable: true,
    configurable: true
  })
  
  function getIsTTY () {
    return( (this._dest) ? this._dest.isTTY
          : (this._src) ? this._src.isTTY
          : false
          )
  }
  
  // basically just get replace the getter/setter with a regular value
  function setIsTTY (isTTY) {
    Object.defineProperty(this, 'isTTY', {
      value: isTTY,
      enumerable: true,
      writable: true,
      configurable: true
    })
  }
  
  Object.defineProperty(MuteStream.prototype, 'rows', {
    get: function () {
      return( this._dest ? this._dest.rows
            : this._src ? this._src.rows
            : undefined )
    }, enumerable: true, configurable: true })
  
  Object.defineProperty(MuteStream.prototype, 'columns', {
    get: function () {
      return( this._dest ? this._dest.columns
            : this._src ? this._src.columns
            : undefined )
    }, enumerable: true, configurable: true })
  
  
  MuteStream.prototype.pipe = function (dest) {
    this._dest = dest
    return Stream.prototype.pipe.call(this, dest)
  }
  
  MuteStream.prototype.pause = function () {
    if (this._src) return this._src.pause()
  }
  
  MuteStream.prototype.resume = function () {
    if (this._src) return this._src.resume()
  }
  
  MuteStream.prototype.write = function (c) {
    if (this.muted) {
      if (!this.replace) return true
      if (c.match(/^\u001b/)) {
        this._hadControl = true
        return this.emit('data', c)
      } else {
        if (this._prompt && this._hadControl &&
            c.indexOf(this._prompt) === 0) {
          this._hadControl = false
          this.emit('data', this._prompt)
          c = c.substr(this._prompt.length)
        }
        c = c.toString().replace(/./g, this.replace)
      }
    }
    this.emit('data', c)
  }
  
  MuteStream.prototype.end = function (c) {
    if (this.muted) {
      if (c && this.replace) {
        c = c.toString().replace(/./g, this.replace)
      } else {
        c = null
      }
    }
    if (c) this.emit('data', c)
    this.emit('end')
  }
  
  function proxy (fn) { return function () {
    var d = this._dest
    var s = this._src
    if (d && d[fn]) d[fn].apply(d, arguments)
    if (s && s[fn]) s[fn].apply(s, arguments)
  }}
  
  MuteStream.prototype.destroy = proxy('destroy')
  MuteStream.prototype.destroySoon = proxy('destroySoon')
  MuteStream.prototype.close = proxy('close')