node_modules

1 files changed, 37 insertions, 0 deletions

diff --git a/node_modules/string-width/index.js b/node_modules/string-width/index.js
new file mode 100644
index 000000000..b9bec6244
--- /dev/null
+++ b/node_modules/string-width/index.js
@@ -0,0 +1,37 @@
+'use strict';
+var stripAnsi = require('strip-ansi');
+var codePointAt = require('code-point-at');
+var isFullwidthCodePoint = require('is-fullwidth-code-point');
+
+// https://github.com/nodejs/io.js/blob/cff7300a578be1b10001f2d967aaedc88aee6402/lib/readline.js#L1345
+module.exports = function (str) {
+	if (typeof str !== 'string' || str.length === 0) {
+		return 0;
+	}
+
+	var width = 0;
+
+	str = stripAnsi(str);
+
+	for (var i = 0; i < str.length; i++) {
+		var code = codePointAt(str, i);
+
+		// ignore control characters
+		if (code <= 0x1f || (code >= 0x7f && code <= 0x9f)) {
+			continue;
+		}
+
+		// surrogates
+		if (code >= 0x10000) {
+			i++;
+		}
+
+		if (isFullwidthCodePoint(code)) {
+			width += 2;
+		} else {
+			width++;
+		}
+	}
+
+	return width;
+};