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// Copyright Joyent, Inc. and other Node contributors. | ||
// | ||
// Permission is hereby granted, free of charge, to any person obtaining a | ||
// copy of this software and associated documentation files (the | ||
// "Software"), to deal in the Software without restriction, including | ||
// without limitation the rights to use, copy, modify, merge, publish, | ||
// distribute, sublicense, and/or sell copies of the Software, and to permit | ||
// persons to whom the Software is furnished to do so, subject to the | ||
// following conditions: | ||
// | ||
// The above copyright notice and this permission notice shall be included | ||
// in all copies or substantial portions of the Software. | ||
// | ||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN | ||
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, | ||
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | ||
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | ||
// USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
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var assert = require('assert'); | ||
var inherits = require('util').inherits; | ||
var net = require('net'); | ||
var TTY = process.binding('tty_wrap').TTY; | ||
var isTTY = process.binding('tty_wrap').isTTY; | ||
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var stdinHandle; | ||
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exports.isatty = function(fd) { | ||
return isTTY(fd); | ||
}; | ||
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exports.setRawMode = function(flag) { | ||
assert.ok(stdinHandle, "stdin must be initialized before calling setRawMode"); | ||
stdinHandle.setRawMode(flag); | ||
}; | ||
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exports.getWindowSize = function() { | ||
//throw new Error("implement me"); | ||
return 80; | ||
}; | ||
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exports.setWindowSize = function() { | ||
throw new Error("implement me"); | ||
}; | ||
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function ReadStream(fd) { | ||
if (!(this instanceof ReadStream)) return new ReadStream(fd); | ||
net.Socket.call(this, { | ||
handle: new TTY(fd) | ||
}); | ||
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this.writable = false; | ||
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var self = this, | ||
keypressListeners = this.listeners('keypress'); | ||
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function onData(b) { | ||
if (keypressListeners.length) { | ||
self._emitKey(b); | ||
} else { | ||
// Nobody's watching anyway | ||
self.removeListener('data', onData); | ||
self.on('newListener', onNewListener); | ||
} | ||
} | ||
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function onNewListener(event) { | ||
if (event == 'keypress') { | ||
self.on('data', onData); | ||
self.removeListener('newListener', onNewListener); | ||
} | ||
} | ||
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if (!stdinHandle) stdinHandle = this._handle; | ||
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this.on('newListener', onNewListener); | ||
} | ||
inherits(ReadStream, net.Socket); | ||
exports.ReadStream = ReadStream; | ||
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ReadStream.prototype.isTTY = true; | ||
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/* | ||
Some patterns seen in terminal key escape codes, derived from combos seen | ||
at http://www.midnight-commander.org/browser/lib/tty/key.c | ||
ESC letter | ||
ESC [ letter | ||
ESC [ modifier letter | ||
ESC [ 1 ; modifier letter | ||
ESC [ num char | ||
ESC [ num ; modifier char | ||
ESC O letter | ||
ESC O modifier letter | ||
ESC O 1 ; modifier letter | ||
ESC N letter | ||
ESC [ [ num ; modifier char | ||
ESC [ [ 1 ; modifier letter | ||
ESC ESC [ num char | ||
ESC ESC O letter | ||
- char is usually ~ but $ and ^ also happen with rxvt | ||
- modifier is 1 + | ||
(shift * 1) + | ||
(left_alt * 2) + | ||
(ctrl * 4) + | ||
(right_alt * 8) | ||
- two leading ESCs apparently mean the same as one leading ESC | ||
*/ | ||
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// Regexes used for ansi escape code splitting | ||
var metaKeyCodeRe = /^(?:\x1b)([a-zA-Z0-9])$/; | ||
var functionKeyCodeRe = | ||
/^(?:\x1b+)(O|N|\[|\[\[)(?:(\d+)(?:;(\d+))?([~^$])|(?:1;)?(\d+)?([a-zA-Z]))/; | ||
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ReadStream.prototype._emitKey = function(s) { | ||
var char, | ||
key = { | ||
name: undefined, | ||
ctrl: false, | ||
meta: false, | ||
shift: false | ||
}, | ||
parts; | ||
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if (Buffer.isBuffer(s)) { | ||
if (s[0] > 127 && s[1] === undefined) { | ||
s[0] -= 128; | ||
s = '\x1b' + s.toString(this.encoding || 'utf-8'); | ||
} else { | ||
s = s.toString(this.encoding || 'utf-8'); | ||
} | ||
} | ||
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if (s === '\r' || s === '\n') { | ||
// enter | ||
key.name = 'enter'; | ||
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} else if (s === '\t') { | ||
// tab | ||
key.name = 'tab'; | ||
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} else if (s === '\b' || s === '\x7f' || | ||
s === '\x1b\x7f' || s === '\x1b\b') { | ||
// backspace or ctrl+h | ||
key.name = 'backspace'; | ||
key.meta = (s.charAt(0) === '\x1b'); | ||
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} else if (s === '\x1b' || s === '\x1b\x1b') { | ||
// escape key | ||
key.name = 'escape'; | ||
key.meta = (s.length === 2); | ||
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} else if (s === ' ' || s === '\x1b ') { | ||
key.name = 'space'; | ||
key.meta = (s.length === 2); | ||
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} else if (s <= '\x1a') { | ||
// ctrl+letter | ||
key.name = String.fromCharCode(s.charCodeAt(0) + 'a'.charCodeAt(0) - 1); | ||
key.ctrl = true; | ||
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} else if (s.length === 1 && s >= 'a' && s <= 'z') { | ||
// lowercase letter | ||
key.name = s; | ||
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} else if (s.length === 1 && s >= 'A' && s <= 'Z') { | ||
// shift+letter | ||
key.name = s.toLowerCase(); | ||
key.shift = true; | ||
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} else if (parts = metaKeyCodeRe.exec(s)) { | ||
// meta+character key | ||
key.name = parts[1].toLowerCase(); | ||
key.meta = true; | ||
key.shift = /^[A-Z]$/.test(parts[1]); | ||
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} else if (parts = functionKeyCodeRe.exec(s)) { | ||
// ansi escape sequence | ||
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// reassemble the key code leaving out leading \x1b's, | ||
// the modifier key bitflag and any meaningless "1;" sequence | ||
var code = (parts[1] || '') + (parts[2] || '') + | ||
(parts[4] || '') + (parts[6] || ''), | ||
modifier = (parts[3] || parts[5] || 1) - 1; | ||
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// Parse the key modifier | ||
key.ctrl = !!(modifier & 4); | ||
key.meta = !!(modifier & 10); | ||
key.shift = !!(modifier & 1); | ||
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// Parse the key itself | ||
switch (code) { | ||
/* xterm/gnome ESC O letter */ | ||
case 'OP': key.name = 'f1'; break; | ||
case 'OQ': key.name = 'f2'; break; | ||
case 'OR': key.name = 'f3'; break; | ||
case 'OS': key.name = 'f4'; break; | ||
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/* xterm/rxvt ESC [ number ~ */ | ||
case '[11~': key.name = 'f1'; break; | ||
case '[12~': key.name = 'f2'; break; | ||
case '[13~': key.name = 'f3'; break; | ||
case '[14~': key.name = 'f4'; break; | ||
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/* common */ | ||
case '[15~': key.name = 'f5'; break; | ||
case '[17~': key.name = 'f6'; break; | ||
case '[18~': key.name = 'f7'; break; | ||
case '[19~': key.name = 'f8'; break; | ||
case '[20~': key.name = 'f9'; break; | ||
case '[21~': key.name = 'f10'; break; | ||
case '[23~': key.name = 'f11'; break; | ||
case '[24~': key.name = 'f12'; break; | ||
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/* xterm ESC [ letter */ | ||
case '[A': key.name = 'up'; break; | ||
case '[B': key.name = 'down'; break; | ||
case '[C': key.name = 'right'; break; | ||
case '[D': key.name = 'left'; break; | ||
case '[E': key.name = 'clear'; break; | ||
case '[F': key.name = 'end'; break; | ||
case '[H': key.name = 'home'; break; | ||
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/* xterm/gnome ESC O letter */ | ||
case 'OA': key.name = 'up'; break; | ||
case 'OB': key.name = 'down'; break; | ||
case 'OC': key.name = 'right'; break; | ||
case 'OD': key.name = 'left'; break; | ||
case 'OE': key.name = 'clear'; break; | ||
case 'OF': key.name = 'end'; break; | ||
case 'OH': key.name = 'home'; break; | ||
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/* xterm/rxvt ESC [ number ~ */ | ||
case '[1~': key.name = 'home'; break; | ||
case '[2~': key.name = 'insert'; break; | ||
case '[3~': key.name = 'delete'; break; | ||
case '[4~': key.name = 'end'; break; | ||
case '[5~': key.name = 'pageup'; break; | ||
case '[6~': key.name = 'pagedown'; break; | ||
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/* putty */ | ||
case '[[5~': key.name = 'pageup'; break; | ||
case '[[6~': key.name = 'pagedown'; break; | ||
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/* rxvt */ | ||
case '[7~': key.name = 'home'; break; | ||
case '[8~': key.name = 'end'; break; | ||
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/* rxvt keys with modifiers */ | ||
case '[a': key.name = 'up'; key.shift = true; break; | ||
case '[b': key.name = 'down'; key.shift = true; break; | ||
case '[c': key.name = 'right'; key.shift = true; break; | ||
case '[d': key.name = 'left'; key.shift = true; break; | ||
case '[e': key.name = 'clear'; key.shift = true; break; | ||
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case '[2$': key.name = 'insert'; key.shift = true; break; | ||
case '[3$': key.name = 'delete'; key.shift = true; break; | ||
case '[5$': key.name = 'pageup'; key.shift = true; break; | ||
case '[6$': key.name = 'pagedown'; key.shift = true; break; | ||
case '[7$': key.name = 'home'; key.shift = true; break; | ||
case '[8$': key.name = 'end'; key.shift = true; break; | ||
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case 'Oa': key.name = 'up'; key.ctrl = true; break; | ||
case 'Ob': key.name = 'down'; key.ctrl = true; break; | ||
case 'Oc': key.name = 'right'; key.ctrl = true; break; | ||
case 'Od': key.name = 'left'; key.ctrl = true; break; | ||
case 'Oe': key.name = 'clear'; key.ctrl = true; break; | ||
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case '[2^': key.name = 'insert'; key.ctrl = true; break; | ||
case '[3^': key.name = 'delete'; key.ctrl = true; break; | ||
case '[5^': key.name = 'pageup'; key.ctrl = true; break; | ||
case '[6^': key.name = 'pagedown'; key.ctrl = true; break; | ||
case '[7^': key.name = 'home'; key.ctrl = true; break; | ||
case '[8^': key.name = 'end'; key.ctrl = true; break; | ||
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/* misc. */ | ||
case '[Z': key.name = 'tab'; key.shift = true; break; | ||
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} | ||
} else if (s.length > 1 && s[0] !== '\x1b') { | ||
// Got a longer-than-one string of characters. | ||
// Probably a paste, since it wasn't a control sequence. | ||
Array.prototype.forEach.call(s, this._emitKey, this); | ||
return; | ||
} | ||
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// Don't emit a key if no name was found | ||
if (key.name === undefined) { | ||
key = undefined; | ||
} | ||
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if (s.length === 1) { | ||
char = s; | ||
} | ||
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if (key || char) { | ||
this.emit('keypress', char, key); | ||
} | ||
}; | ||
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function WriteStream(fd) { | ||
if (!(this instanceof WriteStream)) return new WriteStream(fd); | ||
net.Socket.call(this, { | ||
handle: new TTY(fd) | ||
}); | ||
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this.readable = false; | ||
} | ||
inherits(WriteStream, net.Socket); | ||
exports.WriteStream = WriteStream; | ||
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WriteStream.prototype.isTTY = true; | ||
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WriteStream.prototype.cursorTo = function(x, y) { | ||
if (typeof x !== 'number' && typeof y !== 'number') | ||
return; | ||
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if (typeof x !== 'number') | ||
throw new Error("Can't set cursor row without also setting it's column"); | ||
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if (typeof y !== 'number') { | ||
this.write('\x1b[' + (x + 1) + 'G'); | ||
} else { | ||
this.write('\x1b[' + (y + 1) + ';' + (x + 1) + 'H'); | ||
} | ||
}; | ||
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WriteStream.prototype.moveCursor = function(dx, dy) { | ||
if (dx < 0) { | ||
this.write('\x1b[' + (-dx) + 'D'); | ||
} else if (dx > 0) { | ||
this.write('\x1b[' + dx + 'C'); | ||
} | ||
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if (dy < 0) { | ||
this.write('\x1b[' + (-dy) + 'A'); | ||
} else if (dy > 0) { | ||
this.write('\x1b[' + dy + 'B'); | ||
} | ||
}; | ||
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WriteStream.prototype.clearLine = function(dir) { | ||
if (dir < 0) { | ||
// to the beginning | ||
this.write('\x1b[1K'); | ||
} else if (dir > 0) { | ||
// to the end | ||
this.write('\x1b[0K'); | ||
} else { | ||
// entire line | ||
this.write('\x1b[2K'); | ||
} | ||
}; | ||
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