diff options
Diffstat (limited to 'lib/internal/readline.js')
| -rw-r--r-- | lib/internal/readline.js | 160 |
1 files changed, 87 insertions, 73 deletions
diff --git a/lib/internal/readline.js b/lib/internal/readline.js index dbe8775dba..60fe946560 100644 --- a/lib/internal/readline.js +++ b/lib/internal/readline.js @@ -1,103 +1,117 @@ 'use strict'; -// Regexes used for ansi escape code splitting +// Regex used for ansi escape code splitting // eslint-disable-next-line no-control-regex -const metaKeyCodeReAnywhere = /(?:\x1b)([a-zA-Z0-9])/; -const functionKeyCodeReAnywhere = new RegExp('(?:\x1b+)(O|N|\\[|\\[\\[)(?:' + [ - '(\\d+)(?:;(\\d+))?([~^$])', - '(?:M([@ #!a`])(.)(.))', // mouse - '(?:1;)?(\\d+)?([a-zA-Z])' -].join('|') + ')'); +// Adopted from https://github.com/chalk/ansi-regex/blob/master/index.js +// License: MIT, authors: @sindresorhus, Qix-, and arjunmehta +// Matches all ansi escape code sequences in a string +const ansi = + /[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><]/g; module.exports = { emitKeys, - getStringWidth, - isFullWidthCodePoint, stripVTControlCharacters }; +if (process.binding('config').hasIntl) { + const icu = process.binding('icu'); + module.exports.getStringWidth = function getStringWidth(str, options) { + options = options || {}; + if (!Number.isInteger(str)) + str = stripVTControlCharacters(String(str)); + return icu.getStringWidth(str, + Boolean(options.ambiguousAsFullWidth), + Boolean(options.expandEmojiSequence)); + }; + module.exports.isFullWidthCodePoint = + function isFullWidthCodePoint(code, options) { + if (typeof code !== 'number') + return false; + return icu.getStringWidth(code, options) === 2; + }; +} else { + /** + * Returns the number of columns required to display the given string. + */ + module.exports.getStringWidth = function getStringWidth(str) { + if (Number.isInteger(str)) + return module.exports.isFullWidthCodePoint(str) ? 2 : 1; -/** - * Returns the number of columns required to display the given string. - */ -function getStringWidth(str) { - let width = 0; + let width = 0; - str = stripVTControlCharacters(str); + str = stripVTControlCharacters(String(str)); - for (var i = 0; i < str.length; i++) { - const code = str.codePointAt(i); + for (var i = 0; i < str.length; i++) { + const code = str.codePointAt(i); - if (code >= 0x10000) { // surrogates - i++; - } + if (code >= 0x10000) { // surrogates + i++; + } - if (isFullWidthCodePoint(code)) { - width += 2; - } else { - width++; + if (module.exports.isFullWidthCodePoint(code)) { + width += 2; + } else { + width++; + } } - } - - return width; -} + return width; + }; -/** - * Returns true if the character represented by a given - * Unicode code point is full-width. Otherwise returns false. - */ -function isFullWidthCodePoint(code) { - if (isNaN(code)) { - return false; - } + /** + * Returns true if the character represented by a given + * Unicode code point is full-width. Otherwise returns false. + */ + module.exports.isFullWidthCodePoint = function isFullWidthCodePoint(code) { + if (!Number.isInteger(code)) { + return false; + } - // Code points are derived from: - // http://www.unicode.org/Public/UNIDATA/EastAsianWidth.txt - if (code >= 0x1100 && ( - code <= 0x115f || // Hangul Jamo - 0x2329 === code || // LEFT-POINTING ANGLE BRACKET - 0x232a === code || // RIGHT-POINTING ANGLE BRACKET - // CJK Radicals Supplement .. Enclosed CJK Letters and Months - (0x2e80 <= code && code <= 0x3247 && code !== 0x303f) || - // Enclosed CJK Letters and Months .. CJK Unified Ideographs Extension A - 0x3250 <= code && code <= 0x4dbf || - // CJK Unified Ideographs .. Yi Radicals - 0x4e00 <= code && code <= 0xa4c6 || - // Hangul Jamo Extended-A - 0xa960 <= code && code <= 0xa97c || - // Hangul Syllables - 0xac00 <= code && code <= 0xd7a3 || - // CJK Compatibility Ideographs - 0xf900 <= code && code <= 0xfaff || - // Vertical Forms - 0xfe10 <= code && code <= 0xfe19 || - // CJK Compatibility Forms .. Small Form Variants - 0xfe30 <= code && code <= 0xfe6b || - // Halfwidth and Fullwidth Forms - 0xff01 <= code && code <= 0xff60 || - 0xffe0 <= code && code <= 0xffe6 || - // Kana Supplement - 0x1b000 <= code && code <= 0x1b001 || - // Enclosed Ideographic Supplement - 0x1f200 <= code && code <= 0x1f251 || - // CJK Unified Ideographs Extension B .. Tertiary Ideographic Plane - 0x20000 <= code && code <= 0x3fffd)) { - return true; - } + // Code points are derived from: + // http://www.unicode.org/Public/UNIDATA/EastAsianWidth.txt + if (code >= 0x1100 && ( + code <= 0x115f || // Hangul Jamo + 0x2329 === code || // LEFT-POINTING ANGLE BRACKET + 0x232a === code || // RIGHT-POINTING ANGLE BRACKET + // CJK Radicals Supplement .. Enclosed CJK Letters and Months + (0x2e80 <= code && code <= 0x3247 && code !== 0x303f) || + // Enclosed CJK Letters and Months .. CJK Unified Ideographs Extension A + 0x3250 <= code && code <= 0x4dbf || + // CJK Unified Ideographs .. Yi Radicals + 0x4e00 <= code && code <= 0xa4c6 || + // Hangul Jamo Extended-A + 0xa960 <= code && code <= 0xa97c || + // Hangul Syllables + 0xac00 <= code && code <= 0xd7a3 || + // CJK Compatibility Ideographs + 0xf900 <= code && code <= 0xfaff || + // Vertical Forms + 0xfe10 <= code && code <= 0xfe19 || + // CJK Compatibility Forms .. Small Form Variants + 0xfe30 <= code && code <= 0xfe6b || + // Halfwidth and Fullwidth Forms + 0xff01 <= code && code <= 0xff60 || + 0xffe0 <= code && code <= 0xffe6 || + // Kana Supplement + 0x1b000 <= code && code <= 0x1b001 || + // Enclosed Ideographic Supplement + 0x1f200 <= code && code <= 0x1f251 || + // CJK Unified Ideographs Extension B .. Tertiary Ideographic Plane + 0x20000 <= code && code <= 0x3fffd)) { + return true; + } - return false; + return false; + }; } - /** * Tries to remove all VT control characters. Use to estimate displayed * string width. May be buggy due to not running a real state machine */ function stripVTControlCharacters(str) { - str = str.replace(new RegExp(functionKeyCodeReAnywhere.source, 'g'), ''); - return str.replace(new RegExp(metaKeyCodeReAnywhere.source, 'g'), ''); + return str.replace(ansi, ''); } |