Every new change

node_modules/slice-ansi/index.js

@@ -0,0 +1,59 @@
+'use strict';
+const isFullwidthCodePoint = require('is-fullwidth-code-point');
+const astralRegex = require('astral-regex');
+const ansiStyles = require('ansi-styles');
+
+const ESCAPES = [
+	'\u001B',
+	'\u009B'
+];
+
+const END_CODE = 39;
+
+const wrapAnsi = code => `${ESCAPES[0]}[${code}m`;
+
+module.exports = (str, begin, end) => {
+	const arr = [...str.normalize()];
+
+	end = typeof end === 'number' ? end : arr.length;
+
+	let insideEscape = false;
+	let escapeCode = null;
+	let visible = 0;
+	let output = '';
+
+	for (const [i, x] of arr.entries()) {
+		let leftEscape = false;
+
+		if (ESCAPES.includes(x)) {
+			insideEscape = true;
+			const code = /\d[^m]*/.exec(str.slice(i, i + 18));
+			escapeCode = code === END_CODE ? null : code;
+		} else if (insideEscape && x === 'm') {
+			insideEscape = false;
+			leftEscape = true;
+		}
+
+		if (!insideEscape && !leftEscape) {
+			++visible;
+		}
+
+		if (!astralRegex({exact: true}).test(x) && isFullwidthCodePoint(x.codePointAt())) {
+			++visible;
+		}
+
+		if (visible > begin && visible <= end) {
+			output += x;
+		} else if (visible === begin && !insideEscape && escapeCode !== null && escapeCode !== END_CODE) {
+			output += wrapAnsi(escapeCode);
+		} else if (visible >= end) {
+			if (escapeCode !== null) {
+				output += wrapAnsi(ansiStyles.codes.get(parseInt(escapeCode, 10)) || END_CODE);
+			}
+
+			break;
+		}
+	}
+
+	return output;
+};