修改后台权限

node_modules/get-east-asian-width/lookup.js

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+import {
+	ambiguousRanges,
+	fullwidthRanges,
+	halfwidthRanges,
+	narrowRanges,
+	wideRanges,
+} from './lookup-data.js';
+import {isInRange} from './utilities.js';
+
+const minimumAmbiguousCodePoint = ambiguousRanges[0];
+const maximumAmbiguousCodePoint = ambiguousRanges.at(-1);
+const minimumFullWidthCodePoint = fullwidthRanges[0];
+const maximumFullWidthCodePoint = fullwidthRanges.at(-1);
+const minimumHalfWidthCodePoint = halfwidthRanges[0];
+const maximumHalfWidthCodePoint = halfwidthRanges.at(-1);
+const minimumNarrowCodePoint = narrowRanges[0];
+const maximumNarrowCodePoint = narrowRanges.at(-1);
+const minimumWideCodePoint = wideRanges[0];
+const maximumWideCodePoint = wideRanges.at(-1);
+
+const commonCjkCodePoint = 0x4E_00;
+const [wideFastPathStart, wideFastPathEnd] = findWideFastPathRange(wideRanges);
+
+// Use a hot-path range so common `isWide` calls can skip binary search.
+// The range containing U+4E00 covers common CJK ideographs;
+// fallback to the largest range for resilience to Unicode table changes.
+function findWideFastPathRange(ranges) {
+	let fastPathStart = ranges[0];
+	let fastPathEnd = ranges[1];
+
+	for (let index = 0; index < ranges.length; index += 2) {
+		const start = ranges[index];
+		const end = ranges[index + 1];
+
+		if (
+			commonCjkCodePoint >= start
+			&& commonCjkCodePoint <= end
+		) {
+			return [start, end];
+		}
+
+		if ((end - start) > (fastPathEnd - fastPathStart)) {
+			fastPathStart = start;
+			fastPathEnd = end;
+		}
+	}
+
+	return [fastPathStart, fastPathEnd];
+}
+
+export const isAmbiguous = codePoint => {
+	if (
+		codePoint < minimumAmbiguousCodePoint
+		|| codePoint > maximumAmbiguousCodePoint
+	) {
+		return false;
+	}
+
+	return isInRange(ambiguousRanges, codePoint);
+};
+
+export const isFullWidth = codePoint => {
+	if (
+		codePoint < minimumFullWidthCodePoint
+		|| codePoint > maximumFullWidthCodePoint
+	) {
+		return false;
+	}
+
+	return isInRange(fullwidthRanges, codePoint);
+};
+
+const isHalfWidth = codePoint => {
+	if (
+		codePoint < minimumHalfWidthCodePoint
+		|| codePoint > maximumHalfWidthCodePoint
+	) {
+		return false;
+	}
+
+	return isInRange(halfwidthRanges, codePoint);
+};
+
+const isNarrow = codePoint => {
+	if (
+		codePoint < minimumNarrowCodePoint
+		|| codePoint > maximumNarrowCodePoint
+	) {
+		return false;
+	}
+
+	return isInRange(narrowRanges, codePoint);
+};
+
+export const isWide = codePoint => {
+	if (
+		codePoint >= wideFastPathStart
+		&& codePoint <= wideFastPathEnd
+	) {
+		return true;
+	}
+
+	if (
+		codePoint < minimumWideCodePoint
+		|| codePoint > maximumWideCodePoint
+	) {
+		return false;
+	}
+
+	return isInRange(wideRanges, codePoint);
+};
+
+export function getCategory(codePoint) {
+	if (isAmbiguous(codePoint)) {
+		return 'ambiguous';
+	}
+
+	if (isFullWidth(codePoint)) {
+		return 'fullwidth';
+	}
+
+	if (isHalfWidth(codePoint)) {
+		return 'halfwidth';
+	}
+
+	if (isNarrow(codePoint)) {
+		return 'narrow';
+	}
+
+	if (isWide(codePoint)) {
+		return 'wide';
+	}
+
+	return 'neutral';
+}