debian-mirror-gitlab/app/assets/javascripts/lib/utils/highlight.js

44 lines
1.4 KiB
JavaScript
Raw Normal View History

2019-07-07 11:18:12 +05:30
import fuzzaldrinPlus from 'fuzzaldrin-plus';
import sanitize from 'sanitize-html';
/**
* Wraps substring matches with HTML `<span>` elements.
* Inputs are sanitized before highlighting, so this
* filter is safe to use with `v-html` (as long as `matchPrefix`
* and `matchSuffix` are not being dynamically generated).
*
* Note that this function can't be used inside `v-html` as a filter
* (Vue filters cannot be used inside `v-html`).
*
* @param {String} string The string to highlight
* @param {String} match The substring match to highlight in the string
* @param {String} matchPrefix The string to insert at the beginning of a match
* @param {String} matchSuffix The string to insert at the end of a match
*/
export default function highlight(string, match = '', matchPrefix = '<b>', matchSuffix = '</b>') {
2020-04-08 14:13:33 +05:30
if (!string) {
2019-07-07 11:18:12 +05:30
return '';
}
2020-04-08 14:13:33 +05:30
if (!match) {
2019-07-07 11:18:12 +05:30
return string;
}
const sanitizedValue = sanitize(string.toString(), { allowedTags: [] });
2019-09-04 21:01:54 +05:30
// occurrences is an array of character indices that should be
2019-07-07 11:18:12 +05:30
// highlighted in the original string, i.e. [3, 4, 5, 7]
2019-09-04 21:01:54 +05:30
const occurrences = fuzzaldrinPlus.match(sanitizedValue, match.toString());
2019-07-07 11:18:12 +05:30
return sanitizedValue
.split('')
.map((character, i) => {
2020-04-08 14:13:33 +05:30
if (occurrences.includes(i)) {
2019-07-07 11:18:12 +05:30
return `${matchPrefix}${character}${matchSuffix}`;
}
return character;
})
.join('');
}