131 lines
2.7 KiB
JavaScript
131 lines
2.7 KiB
JavaScript
'use strict';
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const x = module.exports;
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const ESC = '\u001B[';
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const OSC = '\u001B]';
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const BEL = '\u0007';
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const SEP = ';';
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const isTerminalApp = process.env.TERM_PROGRAM === 'Apple_Terminal';
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x.cursorTo = (x, y) => {
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if (typeof x !== 'number') {
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throw new TypeError('The `x` argument is required');
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}
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if (typeof y !== 'number') {
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return ESC + (x + 1) + 'G';
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}
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return ESC + (y + 1) + ';' + (x + 1) + 'H';
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};
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x.cursorMove = (x, y) => {
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if (typeof x !== 'number') {
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throw new TypeError('The `x` argument is required');
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}
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let ret = '';
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if (x < 0) {
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ret += ESC + (-x) + 'D';
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} else if (x > 0) {
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ret += ESC + x + 'C';
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}
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if (y < 0) {
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ret += ESC + (-y) + 'A';
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} else if (y > 0) {
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ret += ESC + y + 'B';
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}
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return ret;
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};
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x.cursorUp = count => ESC + (typeof count === 'number' ? count : 1) + 'A';
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x.cursorDown = count => ESC + (typeof count === 'number' ? count : 1) + 'B';
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x.cursorForward = count => ESC + (typeof count === 'number' ? count : 1) + 'C';
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x.cursorBackward = count => ESC + (typeof count === 'number' ? count : 1) + 'D';
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x.cursorLeft = ESC + 'G';
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x.cursorSavePosition = ESC + (isTerminalApp ? '7' : 's');
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x.cursorRestorePosition = ESC + (isTerminalApp ? '8' : 'u');
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x.cursorGetPosition = ESC + '6n';
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x.cursorNextLine = ESC + 'E';
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x.cursorPrevLine = ESC + 'F';
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x.cursorHide = ESC + '?25l';
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x.cursorShow = ESC + '?25h';
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x.eraseLines = count => {
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let clear = '';
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for (let i = 0; i < count; i++) {
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clear += x.eraseLine + (i < count - 1 ? x.cursorUp() : '');
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}
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if (count) {
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clear += x.cursorLeft;
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}
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return clear;
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};
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x.eraseEndLine = ESC + 'K';
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x.eraseStartLine = ESC + '1K';
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x.eraseLine = ESC + '2K';
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x.eraseDown = ESC + 'J';
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x.eraseUp = ESC + '1J';
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x.eraseScreen = ESC + '2J';
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x.scrollUp = ESC + 'S';
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x.scrollDown = ESC + 'T';
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x.clearScreen = '\u001Bc';
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x.clearTerminal = process.platform === 'win32' ?
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`${x.eraseScreen}${ESC}0f` :
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// 1. Erases the screen (Only done in case `2` is not supported)
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// 2. Erases the whole screen including scrollback buffer
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// 3. Moves cursor to the top-left position
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// More info: https://www.real-world-systems.com/docs/ANSIcode.html
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`${x.eraseScreen}${ESC}3J${ESC}H`;
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x.beep = BEL;
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x.link = (text, url) => {
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return [
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OSC,
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'8',
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SEP,
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SEP,
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url,
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BEL,
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text,
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OSC,
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'8',
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SEP,
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SEP,
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BEL
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].join('');
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};
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x.image = (buf, opts) => {
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opts = opts || {};
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let ret = OSC + '1337;File=inline=1';
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if (opts.width) {
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ret += `;width=${opts.width}`;
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}
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if (opts.height) {
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ret += `;height=${opts.height}`;
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}
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if (opts.preserveAspectRatio === false) {
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ret += ';preserveAspectRatio=0';
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}
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return ret + ':' + buf.toString('base64') + BEL;
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};
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x.iTerm = {};
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x.iTerm.setCwd = cwd => OSC + '50;CurrentDir=' + (cwd || process.cwd()) + BEL;
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