.config/coc/extensions/node_modules/coc-prettier/node_modules/string-width/index.js

   1 'use strict';
   2 const stripAnsi = require('strip-ansi');
   3 const isFullwidthCodePoint = require('is-fullwidth-code-point');
   4
   5 module.exports = str => {
   6         if (typeof str !== 'string' || str.length === 0) {
   7                 return 0;
   8         }
   9
  10         str = stripAnsi(str);
  11
  12         let width = 0;
  13
  14         for (let i = 0; i < str.length; i++) {
  15                 const code = str.codePointAt(i);
  16
  17                 // Ignore control characters
  18                 if (code <= 0x1F || (code >= 0x7F && code <= 0x9F)) {
  19                         continue;
  20                 }
  21
  22                 // Ignore combining characters
  23                 if (code >= 0x300 && code <= 0x36F) {
  24                         continue;
  25                 }
  26
  27                 // Surrogates
  28                 if (code > 0xFFFF) {
  29                         i++;
  30                 }
  31
  32                 width += isFullwidthCodePoint(code) ? 2 : 1;
  33         }
  34
  35         return width;
  36 };