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ab6c03c0cc
- Use JSX for templates - Docblock/comment everything - Mostly passes ESLint (still some work to do) - Lots of renaming, refactoring, etc. CSS hasn't been updated yet.
38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
import { truncate } from 'flarum/utils/string';
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/**
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* The `highlight` helper searches for a word phrase in a string, and wraps
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* matches with the <mark> tag.
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*
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* @param {String} string The string to highlight.
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* @param {String|RegExp} phrase The word or words to highlight.
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* @param {Integer} [length] The number of characters to truncate the string to.
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* The string will be truncated surrounding the first match.
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* @return {Object}
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*/
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export default function highlight(string, phrase, length) {
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if (!phrase && !length) return string;
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// Convert the word phrase into a global regular expression (if it isn't
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// already) so we can search the string for matched.
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const regexp = phrase instanceof RegExp ? phrase : new RegExp(phrase, 'gi');
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let highlighted = string;
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let start = 0;
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// If a length was given, the truncate the string surrounding the first match.
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if (length) {
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if (phrase) start = Math.max(0, string.search(regexp) - length / 2);
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highlighted = truncate(highlighted, length, start);
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}
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// Convert the string into HTML entities, then highlight all matches with
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// <mark> tags. Then we will return the result as a trusted HTML string.
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highlighted = $('<div/>').text(highlighted).html();
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if (phrase) highlighted = highlighted.replace(regexp, '<mark>$&</mark>');
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return m.trust(highlighted);
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}
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