35 lines
718 B
TypeScript
35 lines
718 B
TypeScript
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type CursorMatch = [
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tokenStart: number | null,
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token: string | null,
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];
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const textAtCursorMatchesToken = (
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str: string,
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caretPosition: number,
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searchTokens: string[],
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): CursorMatch => {
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let word;
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const left = str.slice(0, caretPosition).search(/\S+$/);
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const right = str.slice(caretPosition).search(/\s/);
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if (right < 0) {
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word = str.slice(left);
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} else {
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word = str.slice(left, right + caretPosition);
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}
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if (!word || word.trim().length < 3 || !searchTokens.includes(word[0])) {
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return [null, null];
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}
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word = word.trim().toLowerCase();
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if (word.length > 0) {
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return [left + 1, word];
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} else {
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return [null, null];
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}
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};
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export { textAtCursorMatchesToken };
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