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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/gauge/wide-truncate.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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diff --git a/node_modules/gauge/wide-truncate.js b/node_modules/gauge/wide-truncate.js
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+'use strict'
+var stringWidth = require('string-width')
+var stripAnsi = require('strip-ansi')
+
+module.exports = wideTruncate
+
+function wideTruncate (str, target) {
+ if (stringWidth(str) === 0) return str
+ if (target <= 0) return ''
+ if (stringWidth(str) <= target) return str
+
+ // We compute the number of bytes of ansi sequences here and add
+ // that to our initial truncation to ensure that we don't slice one
+ // that we want to keep in half.
+ var noAnsi = stripAnsi(str)
+ var ansiSize = str.length + noAnsi.length
+ var truncated = str.slice(0, target + ansiSize)
+
+ // we have to shrink the result to account for our ansi sequence buffer
+ // (if an ansi sequence was truncated) and double width characters.
+ while (stringWidth(truncated) > target) {
+ truncated = truncated.slice(0, -1)
+ }
+ return truncated
+}