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| Current File : //proc/thread-self/root/usr/local/lib/node_modules/serve/node_modules/string-width/index.js |
import stripAnsi from 'strip-ansi';
import eastAsianWidth from 'eastasianwidth';
import emojiRegex from 'emoji-regex';
export default function stringWidth(string, options = {}) {
if (typeof string !== 'string' || string.length === 0) {
return 0;
}
options = {
ambiguousIsNarrow: true,
...options
};
string = stripAnsi(string);
if (string.length === 0) {
return 0;
}
string = string.replace(emojiRegex(), ' ');
const ambiguousCharacterWidth = options.ambiguousIsNarrow ? 1 : 2;
let width = 0;
for (const character of string) {
const codePoint = character.codePointAt(0);
// Ignore control characters
if (codePoint <= 0x1F || (codePoint >= 0x7F && codePoint <= 0x9F)) {
continue;
}
// Ignore combining characters
if (codePoint >= 0x300 && codePoint <= 0x36F) {
continue;
}
const code = eastAsianWidth.eastAsianWidth(character);
switch (code) {
case 'F':
case 'W':
width += 2;
break;
case 'A':
width += ambiguousCharacterWidth;
break;
default:
width += 1;
}
}
return width;
}
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