53 lines
1.7 KiB
JavaScript
53 lines
1.7 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
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const isObject = require('../predicate/isObject.js');
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const regexMultiByte = /[\u200d\ud800-\udfff\u0300-\u036f\ufe20-\ufe2f\u20d0-\u20ff\ufe0e\ufe0f]/;
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function truncate(string, options) {
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string = string != null ? `${string}` : '';
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let length = 30;
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let omission = '...';
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if (isObject.isObject(options)) {
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length = parseLength(options.length);
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omission = 'omission' in options ? `${options.omission}` : '...';
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}
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let i = string.length;
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const lengthOmission = Array.from(omission).length;
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const lengthBase = Math.max(length - lengthOmission, 0);
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let strArray = undefined;
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const unicode = regexMultiByte.test(string);
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if (unicode) {
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strArray = Array.from(string);
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i = strArray.length;
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}
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if (length >= i) {
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return string;
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}
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if (i <= lengthOmission) {
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return omission;
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}
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let base = strArray === undefined ? string.slice(0, lengthBase) : strArray?.slice(0, lengthBase).join('');
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const separator = options?.separator;
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if (!separator) {
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base += omission;
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return base;
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}
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const search = separator instanceof RegExp ? separator.source : separator;
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const flags = 'u' + (separator instanceof RegExp ? separator.flags.replace('u', '') : '');
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const withoutSeparator = new RegExp(`(?<result>.*(?:(?!${search}).))(?:${search})`, flags).exec(base);
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return (!withoutSeparator?.groups ? base : withoutSeparator.groups.result) + omission;
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}
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function parseLength(length) {
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if (length == null) {
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return 30;
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}
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if (length <= 0) {
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return 0;
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}
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return length;
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}
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exports.truncate = truncate;
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