32 lines
786 B
TypeScript
32 lines
786 B
TypeScript
// https://github.com/tootsuite/mastodon/blob/master/app/javascript/mastodon/components/autosuggest_textarea.js
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const textAtCursorMatch = (
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str: string,
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cursorPosition: number,
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separators: Array<string> = ['@', '#', ':']
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): [number | null, string | null] => {
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let word: string
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const left = str.slice(0, cursorPosition).search(/\S+$/)
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const right = str.slice(cursorPosition).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 + cursorPosition)
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}
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if (!word || word.trim().length < 3 || separators.indexOf(word[0]) === -1) {
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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 default textAtCursorMatch
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