mirror of
https://github.com/nodejs/node.git
synced 2024-11-29 23:16:30 +01:00
335 lines
9.2 KiB
JavaScript
335 lines
9.2 KiB
JavaScript
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var binding = process.binding('stdio'),
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net = require('net'),
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inherits = require('util').inherits,
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spawn = require('child_process').spawn;
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exports.open = function(path, args) {
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var fds = binding.openpty();
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var slaveFD = fds[0];
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var masterFD = fds[1];
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var env = { TERM: 'vt100' };
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for (var k in process.env) {
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env[k] = process.env[k];
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}
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var stream = require('net').Stream(slaveFD);
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stream.readable = stream.writable = true;
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stream.resume();
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child = spawn(path, args, {
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env: env,
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customFds: [masterFD, masterFD, masterFD],
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setuid: true
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});
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return [stream, child];
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};
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function ReadStream(fd) {
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if (!(this instanceof ReadStream)) return new ReadStream(fd);
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net.Socket.call(this, fd);
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var self = this,
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keypressListeners = this.listeners('keypress');
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function onData(b) {
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if (keypressListeners.length) {
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self._emitKey(b);
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} else {
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// Nobody's watching anyway
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self.removeListener('data', onData);
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self.on('newlistener', onNewListener);
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}
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}
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function onNewListener(event) {
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if (event == 'keypress') {
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self.on('data', onData);
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self.removeListener('newlistener', onNewListener);
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}
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}
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this.on('newListener', onNewListener);
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}
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inherits(ReadStream, net.Socket);
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exports.ReadStream = ReadStream;
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ReadStream.prototype.isTTY = true;
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/*
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Some patterns seen in terminal key escape codes, derived from combos seen
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at http://www.midnight-commander.org/browser/lib/tty/key.c
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ESC letter
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ESC [ letter
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ESC [ modifier letter
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ESC [ 1 ; modifier letter
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ESC [ num char
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ESC [ num ; modifier char
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ESC O letter
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ESC O modifier letter
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ESC O 1 ; modifier letter
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ESC N letter
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ESC [ [ num ; modifier char
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ESC [ [ 1 ; modifier letter
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ESC ESC [ num char
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ESC ESC O letter
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- char is usually ~ but $ and ^ also happen with rxvt
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- modifier is 1 +
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(shift * 1) +
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(left_alt * 2) +
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(ctrl * 4) +
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(right_alt * 8)
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- two leading ESCs apparently mean the same as one leading ESC
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*/
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// Regexes used for ansi escape code splitting
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var metaKeyCodeRe = /^(?:\x1b)([a-zA-Z0-9])$/;
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var functionKeyCodeRe =
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/^(?:\x1b+)(O|N|\[|\[\[)(?:(\d+)(?:;(\d+))?([~^$])|(?:1;)?(\d+)?([a-zA-Z]))/;
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ReadStream.prototype._emitKey = function(s) {
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var char,
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key = {
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name: undefined,
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ctrl: false,
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meta: false,
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shift: false
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},
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parts;
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if (Buffer.isBuffer(s)) {
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if (s[0] > 127 && s[1] === undefined) {
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s[0] -= 128;
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s = '\x1b' + s.toString(this.encoding || 'utf-8');
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} else {
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s = s.toString(this.encoding || 'utf-8');
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}
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}
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if (s === '\r') {
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// enter
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key.name = 'enter';
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} else if (s === '\t') {
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// tab
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key.name = 'tab';
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} else if (s === '\b' || s === '\x7f' ||
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s === '\x1b\x7f' || s === '\x1b\b') {
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// backspace or ctrl+h
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key.name = 'backspace';
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key.meta = (s.charAt(0) === '\x1b');
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} else if (s === '\x1b' || s === '\x1b\x1b') {
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// escape key
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key.name = 'escape';
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key.meta = (s.length === 2);
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} else if (s === ' ' || s === '\x1b ') {
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key.name = 'space';
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key.meta = (s.length === 2);
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} else if (s <= '\x1a') {
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// ctrl+letter
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key.name = String.fromCharCode(s.charCodeAt(0) + 'a'.charCodeAt(0) - 1);
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key.ctrl = true;
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} else if (s.length === 1 && s >= 'a' && s <= 'z') {
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// lowercase letter
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key.name = s;
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} else if (s.length === 1 && s >= 'A' && s <= 'Z') {
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// shift+letter
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key.name = s.toLowerCase();
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key.shift = true;
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} else if (parts = metaKeyCodeRe.exec(s)) {
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// meta+character key
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key.name = parts[1].toLowerCase();
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key.meta = true;
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key.shift = /^[A-Z]$/.test(parts[1]);
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} else if (parts = functionKeyCodeRe.exec(s)) {
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// ansi escape sequence
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// reassemble the key code leaving out leading \x1b's,
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// the modifier key bitflag and any meaningless "1;" sequence
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var code = (parts[1] || '') + (parts[2] || '') +
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(parts[4] || '') + (parts[6] || ''),
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modifier = (parts[3] || parts[5] || 1) - 1;
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// Parse the key modifier
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key.ctrl = !!(modifier & 4);
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key.meta = !!(modifier & 10);
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key.shift = !!(modifier & 1);
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// Parse the key itself
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switch (code) {
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/* xterm/gnome ESC O letter */
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case 'OP': key.name = 'f1'; break;
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case 'OQ': key.name = 'f2'; break;
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case 'OR': key.name = 'f3'; break;
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case 'OS': key.name = 'f4'; break;
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/* xterm/rxvt ESC [ number ~ */
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case '[11~': key.name = 'f1'; break;
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case '[12~': key.name = 'f2'; break;
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case '[13~': key.name = 'f3'; break;
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case '[14~': key.name = 'f4'; break;
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/* common */
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case '[15~': key.name = 'f5'; break;
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case '[17~': key.name = 'f6'; break;
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case '[18~': key.name = 'f7'; break;
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case '[19~': key.name = 'f8'; break;
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case '[20~': key.name = 'f9'; break;
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case '[21~': key.name = 'f10'; break;
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case '[23~': key.name = 'f11'; break;
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case '[24~': key.name = 'f12'; break;
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/* xterm ESC [ letter */
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case '[A': key.name = 'up'; break;
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case '[B': key.name = 'down'; break;
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case '[C': key.name = 'right'; break;
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case '[D': key.name = 'left'; break;
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case '[E': key.name = 'clear'; break;
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case '[F': key.name = 'end'; break;
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case '[H': key.name = 'home'; break;
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/* xterm/gnome ESC O letter */
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case 'OA': key.name = 'up'; break;
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case 'OB': key.name = 'down'; break;
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case 'OC': key.name = 'right'; break;
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case 'OD': key.name = 'left'; break;
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case 'OE': key.name = 'clear'; break;
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case 'OF': key.name = 'end'; break;
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case 'OH': key.name = 'home'; break;
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/* xterm/rxvt ESC [ number ~ */
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case '[1~': key.name = 'home'; break;
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case '[2~': key.name = 'insert'; break;
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case '[3~': key.name = 'delete'; break;
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case '[4~': key.name = 'end'; break;
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case '[5~': key.name = 'pageup'; break;
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case '[6~': key.name = 'pagedown'; break;
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/* putty */
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case '[[5~': key.name = 'pageup'; break;
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case '[[6~': key.name = 'pagedown'; break;
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/* rxvt */
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case '[7~': key.name = 'home'; break;
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case '[8~': key.name = 'end'; break;
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/* rxvt keys with modifiers */
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case '[a': key.name = 'up'; key.shift = true; break;
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case '[b': key.name = 'down'; key.shift = true; break;
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case '[c': key.name = 'right'; key.shift = true; break;
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case '[d': key.name = 'left'; key.shift = true; break;
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case '[e': key.name = 'clear'; key.shift = true; break;
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case '[2$': key.name = 'insert'; key.shift = true; break;
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case '[3$': key.name = 'delete'; key.shift = true; break;
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case '[5$': key.name = 'pageup'; key.shift = true; break;
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case '[6$': key.name = 'pagedown'; key.shift = true; break;
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case '[7$': key.name = 'home'; key.shift = true; break;
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case '[8$': key.name = 'end'; key.shift = true; break;
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case 'Oa': key.name = 'up'; key.ctrl = true; break;
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case 'Ob': key.name = 'down'; key.ctrl = true; break;
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case 'Oc': key.name = 'right'; key.ctrl = true; break;
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case 'Od': key.name = 'left'; key.ctrl = true; break;
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case 'Oe': key.name = 'clear'; key.ctrl = true; break;
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case '[2^': key.name = 'insert'; key.ctrl = true; break;
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case '[3^': key.name = 'delete'; key.ctrl = true; break;
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case '[5^': key.name = 'pageup'; key.ctrl = true; break;
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case '[6^': key.name = 'pagedown'; key.ctrl = true; break;
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case '[7^': key.name = 'home'; key.ctrl = true; break;
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case '[8^': key.name = 'end'; key.ctrl = true; break;
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/* misc. */
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case '[Z': key.name = 'tab'; key.shift = true; break;
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}
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} else if (s.length > 1 && s[0] !== '\x1b') {
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// Got a longer-than-one string of characters.
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// Probably a paste, since it wasn't a control sequence.
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Array.prototype.forEach.call(s, this._emitKey, this);
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return;
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}
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// Don't emit a key if no name was found
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if (key.name === undefined) {
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key = undefined;
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}
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if (s.length === 1) {
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char = s;
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}
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if (key || char) {
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this.emit('keypress', char, key);
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}
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};
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function WriteStream(fd) {
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if (!(this instanceof WriteStream)) return new WriteStream(fd);
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net.Socket.call(this, fd);
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}
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inherits(WriteStream, net.Socket);
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exports.WriteStream = WriteStream;
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WriteStream.prototype.isTTY = true;
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WriteStream.prototype.cursorTo = function(x, y) {
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if (typeof x !== 'number' && typeof y !== 'number')
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return;
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if (typeof x !== 'number')
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throw new Error("Can't set cursor row without also setting it's column");
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if (typeof x === 'number') {
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this.write('\x1b[' + (x + 1) + 'G');
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} else {
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this.write('\x1b[' + (y + 1) + ';' + (x + 1) + 'H');
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}
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};
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WriteStream.prototype.moveCursor = function(dx, dy) {
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if (dx < 0) {
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this.write('\x1b[' + (-dx) + 'D');
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} else if (dx > 0) {
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this.write('\x1b[' + dx + 'C');
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}
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if (dy < 0) {
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this.write('\x1b[' + (-dy) + 'A');
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} else if (dy > 0) {
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this.write('\x1b[' + dy + 'B');
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}
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};
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WriteStream.prototype.clearLine = function(dir) {
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if (dir < 0) {
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// to the beginning
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this.write('\x1b[1K');
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} else if (dir > 0) {
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// to the end
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this.write('\x1b[0K');
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} else {
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// entire line
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this.write('\x1b[2K');
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}
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};
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