lib/make/text.js
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
const random = require('../random')
const make = require('../make')
const utils = require('../utils')
class text extends make {
/**
* Generate a random alphabetic character
*/
static alpha () {
return String.fromCharCode(random.range('A'.charCodeAt(0), 'z'.charCodeAt(0)))
}
/**
* Generate a random alphanumeric character
*/
static alphanum () {
return String.fromCharCode(random.range('0'.charCodeAt(0), 'z'.charCodeAt(0)))
}
/**
* Generate a random assignment operator
*/
static assignmentOperator () {
return random.pick([
'=', '+=', '-=', '*=', '/=', '%=', '**=', '<<=', '>>=', '>>>=', '&=', '^=', '|='
])
}
/**
* Generate a random arithmetic operator
*/
static arithmeticOperator () {
return random.pick([
'%', '-', '+', '*', '/'
])
}
/**
* Generate a random control character
*/
static controlChar () {
return random.pick([
'\b', '\t', '\n', '\v', '\f', '\r', '\0', '\c', '\a', '\e' // eslint-disable-line no-useless-escape
])
}
/**
* Generate a random digit
*/
static digit () {
return String.fromCharCode(random.range('0'.charCodeAt(0), '9'.charCodeAt(0)))
}
/**
* Generate a random line ending
*/
static lineEnd () {
return random.pick([
'\n', '\r', '\r\n', '\n\r'
])
}
/**
* Generate a random token
*/
static token () {
return random.pick([
'*', '+', '%', '-', '!', '^', ':', '|', '&', '<', '>', '.', '"',
'#', ' ', ';', ',', '{', '}', '(', ')', '[', ']', '/', '\\', '/*', '*/'
])
}
static charset () {
return random.pick([
'UTF-8', 'ISO-8859-1'
])
}
static language () {
return random.pick([
// special casing for i, I, dotted/dotless variants
['tr', 'az', 'crh', 'tt', 'ba'],
// special casing rules: https://developer.mozilla.org/en/CSS/text-transform
['nl', 'el', 'ga'],
// special justification rules
['ja', 'zh'],
// tend to be RTL
['ar', 'he'],
// http://mxr.mozilla.org/mozilla-central/source/gfx/thebes/gfxAtomList.h
['en', 'x-unicode', 'x-western', 'ja', 'ko', 'zh-cn', 'zh-hk', 'zh-tw', 'x-cyrillic', 'el', 'tr', 'he', 'ar', 'x-baltic', 'th', 'x-devanagari', 'x-tamil', 'x-armn', 'x-beng', 'x-cans', 'x-ethi', 'x-geor', 'x-gujr', 'x-guru', 'x-khmr', 'x-knda', 'x-mlym', 'x-orya', 'x-sinh', 'x-telu', 'x-tibt', 'ko-xxx', 'x-central-euro', 'x-symbol', 'x-user-def', 'az', 'ba', 'crh', 'tt'],
// Seen in mxr
['en-US', 'fr', 'fra', 'de', 'ru', 'en-us', 'is-IS', 'xyzzy']
])
}
/**
* Generate a random character that may affect layout
*/
static layoutCharCodes () {
return String.fromCodePoint(
random.pick([
0, // null
160, // non-breaking space
0x005C, // backslash, but in some countries, represents local currency symbol (e.g. yen)
0x00AD, // soft hyphen
0x0BCC, // a Tamil character that is displayed as three glyphs
// http://unicode.org/charts/PDF/U2000.pdf
0x200B, // zero-width space
0x200C, // zero-width non-joiner
0x200D, // zero-width joiner
0x200E, // left-to-right mark
0x200F, // right-to-left mark
0x2011, // non-breaking hyphen
0x2027, // hyphenation point
0x2028, // line separator
0x2029, // paragraph separator
0x202A, // left-to-right embedding
0x202B, // right-to-left embedding
0x202C, // pop directional formatting
0x202D, // left-to-right override
0x202E, // right-to-left override
0x202F, // narrow no-break space
0x2060, // word joiner
0x2061, // function application (one of several invisible mathematical operators)
// http://unicode.org/charts/PDF/U3000.pdf
0x3000, // ideographic space (CJK)
// http://unicode.org/charts/PDF/U0300.pdf
0x0301, // combining acute accent (if it appears after "a", it turns into "a" with an accent)
// Arabic has the interesting property that most letters connect to the next letter.
// Some code calls this "shaping".
0x0643, // arabic letter kaf
0x0645, // arabic letter meem
0x06CD, // arabic letter yeh with tail
0xFDDE, // invalid unicode? but somehow associated with arabic.
// http://unicode.org/reports/tr36/tr36-7.html#Buffer_Overflows
// Characters with especially high expansion factors when they go through various unicode "normalizations"
0x1F82,
0xFDFA,
0xFB2C,
0x0390,
// 0x1D160, // hmm, need surrogates
// Characters with especially high expansion factors when lowercased or uppercased
0x023A,
0x0041,
0xDC1D, // a low surrogate
0xDB00, // a high surrogate
// UFFF0.pdf
0xFFF9, // interlinear annotation anchor
0xFFFA, // interlinear annotation seperator
0xFFFB, // interlinear annotation terminator
0xFFFC, // object replacement character
0xFFFD, // replacement character
0xFEFF, // zero width no-break space
0xFFFF, // not a character
0x00A0, // no-break space
0x2426,
0x003F,
0x00BF,
0xDC80,
0xDCFF,
// http://en.wikipedia.org/wiki/Mapping_of_Unicode_characters
0x205F, // mathematical space
0x2061, // mathematical function application
0x2064, // mathematical invisible separator
0x2044 // fraction slash character
])
)
}
/**
* Generate a random character that affects bidi layout
*/
static bidiCharCodes () {
return String.fromCodePoint(
random.pick([
0x0660, // START_HINDI_DIGITS
0x0669, // END_HINDI_DIGITS
0x066A, // START_ARABIC_SEPARATOR
0x066B, // END_ARABIC_SEPARATOR
0x0030, // START_ARABIC_DIGITS
0x0039, // END_ARABIC_DIGITS
0x06f0, // START_FARSI_DIGITS
0x06f9 // END_FARSI_DIGITS
])
)
}
/**
* Generate a random unicode combining character
* http://www.unicode.org/Public/6.0.0/ucd/UnicodeData.txt
*/
static unicodeCombiningCharacter () {
return String.fromCodePoint(
random.range(
...random.item([
[0x0300, 0x036F], // Combining Diacritical Marks
[0x0483, 0x0489],
[0x07EB, 0x07F3],
[0x135D, 0x135F],
[0x1A7F, 0x1A7F],
[0x1B6B, 0x1B73],
[0x1DC0, 0x1DFF], // Combining Diacritical Marks Supplement
[0x20D0, 0x2DFF],
[0x3099, 0x309A],
[0xA66F, 0xA6F1],
[0xA8E0, 0xA8F1],
[0xFE20, 0xFE26], // Combining Half Marks
[0x101FD, 0x101FD],
[0x1D165, 0x1D169],
[0x1D16D, 0x1D172],
[0x1D17B, 0x1D18B],
[0x1D1AA, 0x1D1AD],
[0x1D242, 0x1D244]
])
)
)
}
/**
* Generate a random basic multilingual plane character
*/
static unicodeBMP () {
return String.fromCodePoint(
random.range(0x0000, 0xFFFF)
)
}
/**
* Generate a random supplementary multilingual plane character
*/
static unicodeSMP () {
return String.fromCodePoint(
random.range(
...random.item([
[0x10000, 0x13FFF],
[0x16000, 0x16FFF],
[0x1B000, 0x1BFFF],
[0x1D000, 0x1DFFF],
[0x1F000, 0x1FFFF]
])
)
)
}
/**
* Generate a random supplementary ideographic plane character
*/
static unicodeSIP () {
return String.fromCodePoint(
random.range(
...random.item([
[0x20000, 0x2BFFF],
[0x2F000, 0x2FFFF]
])
)
)
}
/**
* Generate a random supplementary special-purpose plane character
*/
static unicodeSSP () {
return String.fromCodePoint(
random.range(0xE0000, 0xE0FFF)
)
}
static currency () {
return random.pick([
// https://en.wikipedia.org/wiki/ISO_4217
'USD', 'USS', 'USN', 'EUR', 'CHF', 'GBP', 'XAG', 'XBA', 'XBB', 'XBC',
'XBD', 'XSU', 'XTS', 'XXX'
])
}
static fromBlocks (set, maxlen) {
let s = ''
for (let i = 0; i < random.number(maxlen || 255); i++) {
s += random.pick(set)
}
return s
}
static quotedString () {
return utils.common.quote(text.any())
}
/**
* Wrapper for all text generators
* @returns {string}
*/
static random () {
return random.choose([
[1, text.alpha],
[1, text.alphanum],
[1, text.arithmeticOperator],
[1, text.assignmentOperator],
[1, text.controlChar],
[1, text.digit],
[1, text.lineEnd],
[1, text.token],
[3, text.layoutCharCodes],
[3, text.bidiCharCodes],
[3, text.unicodeCombiningCharacter],
[3, text.unicodeBMP],
[3, text.unicodeSMP],
[3, text.unicodeSIP],
[3, text.unicodeSSP]
])
}
/**
* Generate a single character
*/
static character () {
return text.random().charAt(0)
}
/**
* Generate string comprised of random generators
*/
static any () {
let s = ''
let len = random.range(1, 126)
while (len--) {
s += make.text.random()
}
return s
}
}
module.exports = text
