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var tty = require('tty'); var encode = require('./lib/encode'); var Stream = require('stream').Stream; var exports = module.exports = function () { var input = null; function setInput (s) { if (input) throw new Error('multiple inputs specified') else input = s } var output = null; function setOutput (s) { if (output) throw new Error('multiple outputs specified') else output = s } for (var i = 0; i < arguments.length; i++) { var arg = arguments[i]; if (!arg) continue; if (arg.readable) setInput(arg) else if (arg.stdin || arg.input) setInput(arg.stdin || arg.input) if (arg.writable) setOutput(arg) else if (arg.stdout || arg.output) setOutput(arg.stdout || arg.output) } if (input && typeof input.fd === 'number' && tty.isatty(input.fd)) { if (process.stdin.setRawMode) { process.stdin.setRawMode(true); } else tty.setRawMode(true); } var charm = new Charm; if (input) { input.pipe(charm); } if (output) { charm.pipe(output); } charm.once('^C', process.exit); charm.once('end', function () { if (input) { if (typeof input.fd === 'number' && tty.isatty(input.fd)) { if (process.stdin.setRawMode) { process.stdin.setRawMode(false); } else tty.setRawMode(false); } input.destroy(); } }); return charm; }; var Charm = exports.Charm = function Charm () { this.writable = true; this.readable = true; this.pending = []; } Charm.prototype = new Stream; Charm.prototype.write = function (buf) { var self = this; if (self.pending.length) { var codes = extractCodes(buf); var matched = false; for (var i = 0; i < codes.length; i++) { for (var j = 0; j < self.pending.length; j++) { var cb = self.pending[j]; if (cb(codes[i])) { matched = true; self.pending.splice(j, 1); break; } } } if (matched) return; } if (buf.length === 1) { if (buf[0] === 3) self.emit('^C'); if (buf[0] === 4) self.emit('^D'); } self.emit('data', buf); return self; }; Charm.prototype.destroy = function () { this.end(); }; Charm.prototype.end = function (buf) { if (buf) this.write(buf); this.emit('end'); }; Charm.prototype.reset = function (cb) { this.write(encode('c')); return this; }; Charm.prototype.position = function (x, y) { // get/set absolute coordinates if (typeof x === 'function') { var cb = x; this.pending.push(function (buf) { if (buf[0] === 27 && buf[1] === encode.ord('[') && buf[buf.length-1] === encode.ord('R')) { var pos = buf.toString() .slice(2,-1) .split(';') .map(Number) ; cb(pos[1], pos[0]); return true; } }); this.write(encode('[6n')); } else { this.write(encode( '[' + Math.floor(y) + ';' + Math.floor(x) + 'f' )); } return this; }; Charm.prototype.move = function (x, y) { // set relative coordinates var bufs = []; if (y < 0) this.up(-y) else if (y > 0) this.down(y) if (x > 0) this.right(x) else if (x < 0) this.left(-x) return this; }; Charm.prototype.up = function (y) { if (y === undefined) y = 1; this.write(encode('[' + Math.floor(y) + 'A')); return this; }; Charm.prototype.down = function (y) { if (y === undefined) y = 1; this.write(encode('[' + Math.floor(y) + 'B')); return this; }; Charm.prototype.right = function (x) { if (x === undefined) x = 1; this.write(encode('[' + Math.floor(x) + 'C')); return this; }; Charm.prototype.left = function (x) { if (x === undefined) x = 1; this.write(encode('[' + Math.floor(x) + 'D')); return this; }; Charm.prototype.column = function (x) { this.write(encode('[' + Math.floor(x) + 'G')); return this; }; Charm.prototype.push = function (withAttributes) { this.write(encode(withAttributes ? '7' : '[s')); return this; }; Charm.prototype.pop = function (withAttributes) { this.write(encode(withAttributes ? '8' : '[u')); return this; }; Charm.prototype.erase = function (s) { if (s === 'end' || s === '$') { this.write(encode('[K')); } else if (s === 'start' || s === '^') { this.write(encode('[1K')); } else if (s === 'line') { this.write(encode('[2K')); } else if (s === 'down') { this.write(encode('[J')); } else if (s === 'up') { this.write(encode('[1J')); } else if (s === 'screen') { this.write(encode('[1J')); } else { this.emit('error', new Error('Unknown erase type: ' + s)); } return this; }; Charm.prototype.display = function (attr) { var c = { reset : 0, bright : 1, dim : 2, underscore : 4, blink : 5, reverse : 7, hidden : 8 }[attr]; if (c === undefined) { this.emit('error', new Error('Unknown attribute: ' + attr)); } this.write(encode('[' + c + 'm')); return this; }; Charm.prototype.foreground = function (color) { if (typeof color === 'number') { if (color < 0 || color >= 256) { this.emit('error', new Error('Color out of range: ' + color)); } this.write(encode('[38;5;' + color + 'm')); } else { var c = { black : 30, red : 31, green : 32, yellow : 33, blue : 34, magenta : 35, cyan : 36, white : 37 }[color.toLowerCase()]; if (!c) this.emit('error', new Error('Unknown color: ' + color)); this.write(encode('[' + c + 'm')); } return this; }; Charm.prototype.background = function (color) { if (typeof color === 'number') { if (color < 0 || color >= 256) { this.emit('error', new Error('Color out of range: ' + color)); } this.write(encode('[48;5;' + color + 'm')); } else { var c = { black : 40, red : 41, green : 42, yellow : 43, blue : 44, magenta : 45, cyan : 46, white : 47 }[color.toLowerCase()]; if (!c) this.emit('error', new Error('Unknown color: ' + color)); this.write(encode('[' + c + 'm')); } return this; }; Charm.prototype.cursor = function (visible) { this.write(encode(visible ? '[?25h' : '[?25l')); return this; }; var extractCodes = exports.extractCodes = function (buf) { var codes = []; var start = -1; for (var i = 0; i < buf.length; i++) { if (buf[i] === 27) { if (start >= 0) codes.push(buf.slice(start, i)); start = i; } else if (start >= 0 && i === buf.length - 1) { codes.push(buf.slice(start)); } } return codes; }