28 lines
904 B
JavaScript
28 lines
904 B
JavaScript
/**
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* _s.prune: a more elegant version of truncate
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* prune extra chars, never leaving a half-chopped word.
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* @author github.com/rwz
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*/
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var makeString = require('./helper/makeString');
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var rtrim = require('./rtrim');
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module.exports = function prune(str, length, pruneStr) {
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str = makeString(str);
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length = ~~length;
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pruneStr = pruneStr != null ? String(pruneStr) : '...';
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if (str.length <= length) return str;
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var tmpl = function(c) {
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return c.toUpperCase() !== c.toLowerCase() ? 'A' : ' ';
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},
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template = str.slice(0, length + 1).replace(/.(?=\W*\w*$)/g, tmpl); // 'Hello, world' -> 'HellAA AAAAA'
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if (template.slice(template.length - 2).match(/\w\w/))
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template = template.replace(/\s*\S+$/, '');
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else
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template = rtrim(template.slice(0, template.length - 1));
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return (template + pruneStr).length > str.length ? str : str.slice(0, template.length) + pruneStr;
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};
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