mirror of
https://github.com/nodejs/node.git
synced 2024-11-30 07:27:22 +01:00
399 lines
11 KiB
JavaScript
399 lines
11 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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var assert = require('assert');
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var inherits = require('util').inherits;
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var net = require('net');
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var TTY = process.binding('tty_wrap').TTY;
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var isTTY = process.binding('tty_wrap').isTTY;
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var stdinHandle;
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exports.isatty = function(fd) {
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return isTTY(fd);
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};
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exports.setRawMode = function(flag) {
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assert.ok(stdinHandle, 'stdin must be initialized before calling setRawMode');
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stdinHandle.setRawMode(flag);
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};
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exports.getWindowSize = function() {
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//throw new Error("implement me");
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return 80;
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};
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exports.setWindowSize = function() {
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throw new Error('implement me');
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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, {
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handle: new TTY(fd, true)
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});
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this.writable = false;
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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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if (!stdinHandle) stdinHandle = this._handle;
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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.pause = function() {
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this._handle.unref();
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return net.Socket.prototype.pause.call(this);
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};
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ReadStream.prototype.resume = function() {
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this._handle.ref();
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return net.Socket.prototype.resume.call(this);
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};
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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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key.sequence = s;
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if (s === '\r' || s === '\n') {
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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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key.code = code;
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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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/* from Cygwin and used in libuv */
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case '[[A': key.name = 'f1'; break;
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case '[[B': key.name = 'f2'; break;
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case '[[C': key.name = 'f3'; break;
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case '[[D': key.name = 'f4'; break;
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case '[[E': key.name = 'f5'; 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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default: key.name = 'undefined'; 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, {
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handle: new TTY(fd, false)
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});
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this.readable = false;
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this.writable = true;
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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 y !== '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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WriteStream.prototype.getWindowSize = function() {
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return this._handle.getWindowSize();
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};
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