61 lines
1.3 KiB
JavaScript
61 lines
1.3 KiB
JavaScript
'use strict'
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const stringWidth = require('string-width')
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function ansiAlign (text, opts) {
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if (!text) return text
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opts = opts || {}
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const align = opts.align || 'center'
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// short-circuit `align: 'left'` as no-op
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if (align === 'left') return text
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const split = opts.split || '\n'
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const pad = opts.pad || ' '
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const widthDiffFn = align !== 'right' ? halfDiff : fullDiff
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let returnString = false
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if (!Array.isArray(text)) {
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returnString = true
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text = String(text).split(split)
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}
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let width
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let maxWidth = 0
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text = text.map(function (str) {
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str = String(str)
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width = stringWidth(str)
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maxWidth = Math.max(width, maxWidth)
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return {
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str,
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width
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}
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}).map(function (obj) {
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return new Array(widthDiffFn(maxWidth, obj.width) + 1).join(pad) + obj.str
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})
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return returnString ? text.join(split) : text
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}
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ansiAlign.left = function left (text) {
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return ansiAlign(text, { align: 'left' })
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}
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ansiAlign.center = function center (text) {
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return ansiAlign(text, { align: 'center' })
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}
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ansiAlign.right = function right (text) {
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return ansiAlign(text, { align: 'right' })
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}
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module.exports = ansiAlign
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function halfDiff (maxWidth, curWidth) {
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return Math.floor((maxWidth - curWidth) / 2)
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}
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function fullDiff (maxWidth, curWidth) {
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return maxWidth - curWidth
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}
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