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Diffstat (limited to 'node_modules/wcwidth/index.js')
-rw-r--r-- | node_modules/wcwidth/index.js | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/node_modules/wcwidth/index.js b/node_modules/wcwidth/index.js deleted file mode 100644 index 48cbb60..0000000 --- a/node_modules/wcwidth/index.js +++ /dev/null @@ -1,99 +0,0 @@ -"use strict" - -var defaults = require('defaults') -var combining = require('./combining') - -var DEFAULTS = { - nul: 0, - control: 0 -} - -module.exports = function wcwidth(str) { - return wcswidth(str, DEFAULTS) -} - -module.exports.config = function(opts) { - opts = defaults(opts || {}, DEFAULTS) - return function wcwidth(str) { - return wcswidth(str, opts) - } -} - -/* - * The following functions define the column width of an ISO 10646 - * character as follows: - * - The null character (U+0000) has a column width of 0. - * - Other C0/C1 control characters and DEL will lead to a return value - * of -1. - * - Non-spacing and enclosing combining characters (general category - * code Mn or Me in the - * Unicode database) have a column width of 0. - * - SOFT HYPHEN (U+00AD) has a column width of 1. - * - Other format characters (general category code Cf in the Unicode - * database) and ZERO WIDTH - * SPACE (U+200B) have a column width of 0. - * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) - * have a column width of 0. - * - Spacing characters in the East Asian Wide (W) or East Asian - * Full-width (F) category as - * defined in Unicode Technical Report #11 have a column width of 2. - * - All remaining characters (including all printable ISO 8859-1 and - * WGL4 characters, Unicode control characters, etc.) have a column - * width of 1. - * This implementation assumes that characters are encoded in ISO 10646. -*/ - -function wcswidth(str, opts) { - if (typeof str !== 'string') return wcwidth(str, opts) - - var s = 0 - for (var i = 0; i < str.length; i++) { - var n = wcwidth(str.charCodeAt(i), opts) - if (n < 0) return -1 - s += n - } - - return s -} - -function wcwidth(ucs, opts) { - // test for 8-bit control characters - if (ucs === 0) return opts.nul - if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) return opts.control - - // binary search in table of non-spacing characters - if (bisearch(ucs)) return 0 - - // if we arrive here, ucs is not a combining or C0/C1 control character - return 1 + - (ucs >= 0x1100 && - (ucs <= 0x115f || // Hangul Jamo init. consonants - ucs == 0x2329 || ucs == 0x232a || - (ucs >= 0x2e80 && ucs <= 0xa4cf && - ucs != 0x303f) || // CJK ... Yi - (ucs >= 0xac00 && ucs <= 0xd7a3) || // Hangul Syllables - (ucs >= 0xf900 && ucs <= 0xfaff) || // CJK Compatibility Ideographs - (ucs >= 0xfe10 && ucs <= 0xfe19) || // Vertical forms - (ucs >= 0xfe30 && ucs <= 0xfe6f) || // CJK Compatibility Forms - (ucs >= 0xff00 && ucs <= 0xff60) || // Fullwidth Forms - (ucs >= 0xffe0 && ucs <= 0xffe6) || - (ucs >= 0x20000 && ucs <= 0x2fffd) || - (ucs >= 0x30000 && ucs <= 0x3fffd))); -} - -function bisearch(ucs) { - var min = 0 - var max = combining.length - 1 - var mid - - if (ucs < combining[0][0] || ucs > combining[max][1]) return false - - while (max >= min) { - mid = Math.floor((min + max) / 2) - if (ucs > combining[mid][1]) min = mid + 1 - else if (ucs < combining[mid][0]) max = mid - 1 - else return true - } - - return false -} |