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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, options) {
this._dest = dest
return Stream.prototype.pipe.call(this, dest, options)
}
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/)) {
if(c.indexOf(this._prompt) === 0) {
c = c.substr(this._prompt.length);
c = c.replace(/./g, this.replace);
c = this._prompt + c;
}
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')
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