116 lines
2.4 KiB
JavaScript
116 lines
2.4 KiB
JavaScript
/* jslint node: true */
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'use strict';
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// ENiGMA½
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var Log = require('./logger.js').log;
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var iconv = require('iconv-lite');
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var assert = require('assert');
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var _ = require('lodash');
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iconv.extendNodeEncodings();
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exports.ClientTerminal = ClientTerminal;
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function ClientTerminal(output) {
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this.output = output;
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var self = this;
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var outputEncoding = 'cp437';
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assert(iconv.encodingExists(outputEncoding));
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// convert line feeds such as \n -> \r\n
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this.convertLF = true;
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//
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// Some terminal we handle specially
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// They can also be found in this.env{}
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//
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var termType = 'unknown';
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var termHeight = 0;
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var termWidth = 0;
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// Raw values set by e.g. telnet NAWS, ENVIRONMENT, etc.
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this.env = {};
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Object.defineProperty(this, 'outputEncoding', {
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get : function() {
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return outputEncoding;
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},
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set : function(enc) {
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if(iconv.encodingExists(enc)) {
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outputEncoding = enc;
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} else {
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Log.warn({ encoding : enc }, 'Unknown encoding');
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}
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}
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});
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Object.defineProperty(this, 'termType', {
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get : function() {
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return termType;
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},
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set : function(ttype) {
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termType = ttype.toLowerCase();
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//
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// ANSI terminals should be encoded to CP437
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//
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// Some terminal types provided by Mercyful Fate / Enthral:
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// ANSI-BBS
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// PC-ANSI
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// QANSI
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// SCOANSI
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// VT100
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// XTERM
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// LINUX
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// QNX
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// SCREEN
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//
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if(this.isANSI()) {
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this.outputEncoding = 'cp437';
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} else {
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// :TODO: See how x84 does this -- only set if local/remote are binary
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this.outputEncoding = 'utf8';
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}
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Log.debug( { encoding : this.outputEncoding }, 'Set output encoding due to terminal type change');
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}
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});
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Object.defineProperty(this, 'termWidth', {
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get : function() {
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return termWidth;
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},
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set : function(width) {
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if(width > 0) {
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termWidth = width;
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}
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}
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});
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Object.defineProperty(this, 'termHeight', {
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get : function() {
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return termHeight;
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},
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set : function(height) {
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if(height > 0) {
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termHeight = height;
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}
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}
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});
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}
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ClientTerminal.prototype.isANSI = function() {
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// :TODO: Others??
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return [ 'ansi', 'pc-ansi', 'qansi', 'scoansi' ].indexOf(this.termType) > -1;
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};
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ClientTerminal.prototype.write = function(s, convertLineFeeds) {
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convertLineFeeds = _.isUndefined(convertLineFeeds) ? this.convertLF : convertLineFeeds;
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if(convertLineFeeds && _.isString(s)) {
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s = s.replace(/\n/g, '\r\n');
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}
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this.output.write(iconv.encode(s, this.outputEncoding));
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}; |