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