1 | var Stream = require('stream')
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2 |
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3 | module.exports = MuteStream
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4 |
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5 |
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6 |
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7 | function MuteStream (opts) {
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8 | Stream.apply(this)
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9 | opts = opts || {}
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10 | this.writable = this.readable = true
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11 | this.muted = false
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12 | this.on('pipe', this._onpipe)
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13 | this.replace = opts.replace
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14 |
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15 |
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16 |
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17 |
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18 | this._prompt = opts.prompt || null
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19 | this._hadControl = false
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20 | }
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21 |
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22 | MuteStream.prototype = Object.create(Stream.prototype)
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23 |
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24 | Object.defineProperty(MuteStream.prototype, 'constructor', {
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25 | value: MuteStream,
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26 | enumerable: false
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27 | })
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28 |
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29 | MuteStream.prototype.mute = function () {
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30 | this.muted = true
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31 | }
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32 |
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33 | MuteStream.prototype.unmute = function () {
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34 | this.muted = false
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35 | }
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36 |
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37 | Object.defineProperty(MuteStream.prototype, '_onpipe', {
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38 | value: onPipe,
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39 | enumerable: false,
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40 | writable: true,
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41 | configurable: true
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42 | })
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43 |
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44 | function onPipe (src) {
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45 | this._src = src
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46 | }
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47 |
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48 | Object.defineProperty(MuteStream.prototype, 'isTTY', {
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49 | get: getIsTTY,
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50 | set: setIsTTY,
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51 | enumerable: true,
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52 | configurable: true
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53 | })
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54 |
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55 | function getIsTTY () {
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56 | return( (this._dest) ? this._dest.isTTY
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57 | : (this._src) ? this._src.isTTY
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58 | : false
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59 | )
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60 | }
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61 |
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62 |
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63 | function setIsTTY (isTTY) {
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64 | Object.defineProperty(this, 'isTTY', {
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65 | value: isTTY,
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66 | enumerable: true,
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67 | writable: true,
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68 | configurable: true
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69 | })
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70 | }
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71 |
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72 | Object.defineProperty(MuteStream.prototype, 'rows', {
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73 | get: function () {
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74 | return( this._dest ? this._dest.rows
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75 | : this._src ? this._src.rows
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76 | : undefined )
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77 | }, enumerable: true, configurable: true })
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78 |
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79 | Object.defineProperty(MuteStream.prototype, 'columns', {
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80 | get: function () {
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81 | return( this._dest ? this._dest.columns
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82 | : this._src ? this._src.columns
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83 | : undefined )
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84 | }, enumerable: true, configurable: true })
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85 |
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86 |
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87 | MuteStream.prototype.pipe = function (dest, options) {
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88 | this._dest = dest
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89 | return Stream.prototype.pipe.call(this, dest, options)
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90 | }
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91 |
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92 | MuteStream.prototype.pause = function () {
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93 | if (this._src) return this._src.pause()
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94 | }
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95 |
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96 | MuteStream.prototype.resume = function () {
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97 | if (this._src) return this._src.resume()
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98 | }
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99 |
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100 | MuteStream.prototype.write = function (c) {
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101 | if (this.muted) {
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102 | if (!this.replace) return true
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103 | if (c.match(/^\u001b/)) {
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104 | if(c.indexOf(this._prompt) === 0) {
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105 | c = c.substr(this._prompt.length);
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106 | c = c.replace(/./g, this.replace);
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107 | c = this._prompt + c;
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108 | }
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109 | this._hadControl = true
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110 | return this.emit('data', c)
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111 | } else {
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112 | if (this._prompt && this._hadControl &&
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113 | c.indexOf(this._prompt) === 0) {
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114 | this._hadControl = false
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115 | this.emit('data', this._prompt)
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116 | c = c.substr(this._prompt.length)
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117 | }
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118 | c = c.toString().replace(/./g, this.replace)
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119 | }
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120 | }
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121 | this.emit('data', c)
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122 | }
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123 |
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124 | MuteStream.prototype.end = function (c) {
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125 | if (this.muted) {
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126 | if (c && this.replace) {
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127 | c = c.toString().replace(/./g, this.replace)
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128 | } else {
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129 | c = null
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130 | }
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131 | }
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132 | if (c) this.emit('data', c)
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133 | this.emit('end')
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134 | }
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135 |
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136 | function proxy (fn) { return function () {
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137 | var d = this._dest
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138 | var s = this._src
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139 | if (d && d[fn]) d[fn].apply(d, arguments)
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140 | if (s && s[fn]) s[fn].apply(s, arguments)
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141 | }}
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142 |
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143 | MuteStream.prototype.destroy = proxy('destroy')
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144 | MuteStream.prototype.destroySoon = proxy('destroySoon')
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145 | MuteStream.prototype.close = proxy('close')
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