diff options
Diffstat (limited to 'node_modules/string-width/index.js')
-rw-r--r-- | node_modules/string-width/index.js | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/node_modules/string-width/index.js b/node_modules/string-width/index.js new file mode 100644 index 0000000..f4d261a --- /dev/null +++ b/node_modules/string-width/index.js @@ -0,0 +1,47 @@ +'use strict'; +const stripAnsi = require('strip-ansi'); +const isFullwidthCodePoint = require('is-fullwidth-code-point'); +const emojiRegex = require('emoji-regex'); + +const stringWidth = string => { + if (typeof string !== 'string' || string.length === 0) { + return 0; + } + + string = stripAnsi(string); + + if (string.length === 0) { + return 0; + } + + string = string.replace(emojiRegex(), ' '); + + let width = 0; + + for (let i = 0; i < string.length; i++) { + const code = string.codePointAt(i); + + // Ignore control characters + if (code <= 0x1F || (code >= 0x7F && code <= 0x9F)) { + continue; + } + + // Ignore combining characters + if (code >= 0x300 && code <= 0x36F) { + continue; + } + + // Surrogates + if (code > 0xFFFF) { + i++; + } + + width += isFullwidthCodePoint(code) ? 2 : 1; + } + + return width; +}; + +module.exports = stringWidth; +// TODO: remove this in the next major version +module.exports.default = stringWidth; |