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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/wide-align/align.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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Diffstat (limited to 'node_modules/wide-align/align.js')
-rw-r--r--node_modules/wide-align/align.js65
1 files changed, 65 insertions, 0 deletions
diff --git a/node_modules/wide-align/align.js b/node_modules/wide-align/align.js
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+++ b/node_modules/wide-align/align.js
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+'use strict'
+var stringWidth = require('string-width')
+
+exports.center = alignCenter
+exports.left = alignLeft
+exports.right = alignRight
+
+// lodash's way of generating pad characters.
+
+function createPadding (width) {
+ var result = ''
+ var string = ' '
+ var n = width
+ do {
+ if (n % 2) {
+ result += string;
+ }
+ n = Math.floor(n / 2);
+ string += string;
+ } while (n);
+
+ return result;
+}
+
+function alignLeft (str, width) {
+ var trimmed = str.trimRight()
+ if (trimmed.length === 0 && str.length >= width) return str
+ var padding = ''
+ var strWidth = stringWidth(trimmed)
+
+ if (strWidth < width) {
+ padding = createPadding(width - strWidth)
+ }
+
+ return trimmed + padding
+}
+
+function alignRight (str, width) {
+ var trimmed = str.trimLeft()
+ if (trimmed.length === 0 && str.length >= width) return str
+ var padding = ''
+ var strWidth = stringWidth(trimmed)
+
+ if (strWidth < width) {
+ padding = createPadding(width - strWidth)
+ }
+
+ return padding + trimmed
+}
+
+function alignCenter (str, width) {
+ var trimmed = str.trim()
+ if (trimmed.length === 0 && str.length >= width) return str
+ var padLeft = ''
+ var padRight = ''
+ var strWidth = stringWidth(trimmed)
+
+ if (strWidth < width) {
+ var padLeftBy = parseInt((width - strWidth) / 2, 10)
+ padLeft = createPadding(padLeftBy)
+ padRight = createPadding(width - (strWidth + padLeftBy))
+ }
+
+ return padLeft + trimmed + padRight
+}