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25 lines
828 B
25 lines
828 B
'use strict' |
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var stringWidth = require('string-width') |
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var stripAnsi = require('strip-ansi') |
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module.exports = wideTruncate |
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function wideTruncate (str, target) { |
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if (stringWidth(str) === 0) return str |
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if (target <= 0) return '' |
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if (stringWidth(str) <= target) return str |
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// We compute the number of bytes of ansi sequences here and add |
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// that to our initial truncation to ensure that we don't slice one |
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// that we want to keep in half. |
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var noAnsi = stripAnsi(str) |
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var ansiSize = str.length + noAnsi.length |
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var truncated = str.slice(0, target + ansiSize) |
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// we have to shrink the result to account for our ansi sequence buffer |
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// (if an ansi sequence was truncated) and double width characters. |
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while (stringWidth(truncated) > target) { |
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truncated = truncated.slice(0, -1) |
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} |
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return truncated |
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}
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