59 lines
1.3 KiB
Plaintext
59 lines
1.3 KiB
Plaintext
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'use strict';
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const ESC = '\x1B';
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const CSI = `${ESC}[`;
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const beep = '\u0007';
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const cursor = {
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to(x, y) {
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if (!y) return `${CSI}${x + 1}G`;
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return `${CSI}${y + 1};${x + 1}H`;
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},
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move(x, y) {
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let ret = '';
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if (x < 0) ret += `${CSI}${-x}D`;
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else if (x > 0) ret += `${CSI}${x}C`;
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if (y < 0) ret += `${CSI}${-y}A`;
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else if (y > 0) ret += `${CSI}${y}B`;
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return ret;
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},
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up: (count = 1) => `${CSI}${count}A`,
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down: (count = 1) => `${CSI}${count}B`,
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forward: (count = 1) => `${CSI}${count}C`,
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backward: (count = 1) => `${CSI}${count}D`,
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nextLine: (count = 1) => `${CSI}E`.repeat(count),
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prevLine: (count = 1) => `${CSI}F`.repeat(count),
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left: `${CSI}G`,
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hide: `${CSI}?25l`,
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show: `${CSI}?25h`,
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save: `${ESC}7`,
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restore: `${ESC}8`
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}
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const scroll = {
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up: (count = 1) => `${CSI}S`.repeat(count),
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down: (count = 1) => `${CSI}T`.repeat(count)
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}
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const erase = {
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screen: `${CSI}2J`,
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up: (count = 1) => `${CSI}1J`.repeat(count),
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down: (count = 1) => `${CSI}J`.repeat(count),
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line: `${CSI}2K`,
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lineEnd: `${CSI}K`,
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lineStart: `${CSI}1K`,
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lines(count) {
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let clear = '';
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for (let i = 0; i < count; i++)
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clear += this.line + (i < count - 1 ? cursor.up() : '');
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if (count)
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clear += cursor.left;
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return clear;
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}
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}
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module.exports = { cursor, scroll, erase, beep };
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