2019-05-20 11:18:25 +00:00
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"use strict";
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/**
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* Generates various VT100 ANSI escape sequences.
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* Ported from C#.
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* @licence MPL-2.0 <https://www.mozilla.org/en-US/MPL/2.0/>
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* @source https://gist.github.com/a4edd3204a03f4eedb79785751efb0f3#file-ansi-cs
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* @author Starbeamrainbowlabs
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* GitHub: @sbrl | Twitter: @SBRLabs | Reddit: u/Starbeamrainbowlabs
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***** Changelog *****
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* 27th March 2019:
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* - Initial public release
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*/
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class Ansi {
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constructor() {
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/**
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* Whether we should *actually* emit ANSI escape codes or not.
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* Useful when we want to output to a log file, for example
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* @type {Boolean}
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*/
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this.enabled = true;
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this.escape_codes();
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}
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escape_codes() {
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// Solution on how to output ANSI escape codes in C# from here:
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// https://www.jerriepelser.com/blog/using-ansi-color-codes-in-net-console-apps
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this.reset = this.enabled ? "\u001b[0m" : "";
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this.hicol = this.enabled ? "\u001b[1m" : "";
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this.locol = this.enabled ? "\u001b[2m" : "";
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this.underline = this.enabled ? "\u001b[4m" : "";
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this.inverse = this.enabled ? "\u001b[7m" : "";
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this.fblack = this.enabled ? "\u001b[30m" : "";
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this.fred = this.enabled ? "\u001b[31m" : "";
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this.fgreen = this.enabled ? "\u001b[32m" : "";
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this.fyellow = this.enabled ? "\u001b[33m" : "";
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this.fblue = this.enabled ? "\u001b[34m" : "";
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this.fmagenta = this.enabled ? "\u001b[35m" : "";
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this.fcyan = this.enabled ? "\u001b[36m" : "";
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this.fwhite = this.enabled ? "\u001b[37m" : "";
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this.bblack = this.enabled ? "\u001b[40m" : "";
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this.bred = this.enabled ? "\u001b[41m" : "";
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this.bgreen = this.enabled ? "\u001b[42m" : "";
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this.byellow = this.enabled ? "\u001b[43m" : "";
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this.bblue = this.enabled ? "\u001b[44m" : "";
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this.bmagenta = this.enabled ? "\u001b[45m" : "";
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this.bcyan = this.enabled ? "\u001b[46m" : "";
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this.bwhite = this.enabled ? "\u001b[47m" : "";
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}
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// Thanks to http://ascii-table.com/ansi-escape-sequences.php for the following ANSI escape sequences
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up(lines = 1) {
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return this.enabled ? `\u001b[${lines}A` : "";
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}
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down(lines = 1) {
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return this.enabled ? `\u001b[${lines}B` : "";
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}
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right(lines = 1) {
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return this.enabled ? `\u001b[${lines}C` : "";
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}
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left(lines = 1) {
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return this.enabled ? `\u001b[${lines}D` : "";
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}
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jump_to(x, y) {
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return this.enabled ? `\u001b[${y};${x}H` : "";
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}
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cursor_pos_save() {
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return this.enabled ? `\u001b[s` : "";
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}
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cursor_pos_restore() {
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return this.enabled ? `\u001b[u` : "";
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}
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}
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2019-05-20 13:38:20 +00:00
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const ansi = new Ansi();
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export default ansi;
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