a collection of lightweight TypeScript packages for AT Protocol, the protocol powering Bluesky
atproto
bluesky
typescript
npm
feat(util-text): add isGraphemeLengthInRange function
+65
+5
.changeset/fair-garlics-tickle.md
+5
.changeset/fair-garlics-tickle.md
+25
packages/misc/util-text/lib/index.rn.ts
+25
packages/misc/util-text/lib/index.rn.ts
···
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export const getGraphemeLength = (text: string): number => {
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return countGraphemes(text);
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};
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/**
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* checks if the grapheme length of a string is within the specified range
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* @param text string to check
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* @param min minimum grapheme length (inclusive)
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* @param max maximum grapheme length (inclusive)
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* @returns true if the grapheme length is within range
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*/
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export const isGraphemeLengthInRange = (text: string, min: number, max: number): boolean => {
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const utf16Len = text.length;
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// UTF-16 length < min means grapheme count < min
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if (utf16Len < min) {
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return false;
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}
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// if there's no minimum constraint and UTF-16 length is within max,
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// grapheme count is definitely within max
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if (min === 0 && utf16Len <= max) {
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return true;
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}
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const count = countGraphemes(text);
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return count >= min && count <= max;
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};
+35
packages/misc/util-text/lib/index.ts
+35
packages/misc/util-text/lib/index.ts
···
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return count;
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};
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/**
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* checks if the grapheme length of a string is within the specified range
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* @param text string to check
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* @param min minimum grapheme length (inclusive)
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* @param max maximum grapheme length (inclusive)
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* @returns true if the grapheme length is within range
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*/
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export const isGraphemeLengthInRange = (text: string, min: number, max: number): boolean => {
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const utf16Len = text.length;
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// UTF-16 length < min means grapheme count < min
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if (utf16Len < min) {
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return false;
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}
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// if there's no minimum constraint and UTF-16 length is within max,
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// grapheme count is definitely within max
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if (min === 0 && utf16Len <= max) {
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return true;
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}
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// count graphemes with early termination
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const iterator = segmenter.segment(text)[Symbol.iterator]();
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let count = 0;
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while (!iterator.next().done) {
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count++;
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if (count > max) {
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return false;
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}
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}
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return count >= min;
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};