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'use strict';
const object = {};
const hasOwnProperty = object.hasOwnProperty;
const forOwn = (object, callback) => {
for (const key in object) {
if (hasOwnProperty.call(object, key)) {
callback(key, object[key]);
}
}
};
const extend = (destination, source) => {
if (!source) {
return destination;
}
forOwn(source, (key, value) => {
destination[key] = value;
});
return destination;
};
const forEach = (array, callback) => {
const length = array.length;
let index = -1;
while (++index < length) {
callback(array[index]);
}
};
const fourHexEscape = (hex) => {
return '\\u' + ('0000' + hex).slice(-4);
}
const hexadecimal = (code, lowercase) => {
let hexadecimal = code.toString(16);
if (lowercase) return hexadecimal;
return hexadecimal.toUpperCase();
};
const toString = object.toString;
const isArray = Array.isArray;
const isBuffer = (value) => {
return typeof Buffer === 'function' && Buffer.isBuffer(value);
};
const isObject = (value) => {
// This is a very simple check, but it’s good enough for what we need.
return toString.call(value) == '[object Object]';
};
const isString = (value) => {
return typeof value == 'string' ||
toString.call(value) == '[object String]';
};
const isNumber = (value) => {
return typeof value == 'number' ||
toString.call(value) == '[object Number]';
};
const isBigInt = (value) => {
return typeof value == 'bigint';
};
const isFunction = (value) => {
return typeof value == 'function';
};
const isMap = (value) => {
return toString.call(value) == '[object Map]';
};
const isSet = (value) => {
return toString.call(value) == '[object Set]';
};
/*--------------------------------------------------------------------------*/
// https://mathiasbynens.be/notes/javascript-escapes#single
const singleEscapes = {
'\\': '\\\\',
'\b': '\\b',
'\f': '\\f',
'\n': '\\n',
'\r': '\\r',
'\t': '\\t'
// `\v` is omitted intentionally, because in IE < 9, '\v' == 'v'.
// '\v': '\\x0B'
};
const regexSingleEscape = /[\\\b\f\n\r\t]/;
const regexDigit = /[0-9]/;
const regexWhitespace = /[\xA0\u1680\u2000-\u200A\u2028\u2029\u202F\u205F\u3000]/;
const escapeEverythingRegex = /([\uD800-\uDBFF][\uDC00-\uDFFF])|([\uD800-\uDFFF])|(['"`])|[^]/g;
const escapeNonAsciiRegex = /([\uD800-\uDBFF][\uDC00-\uDFFF])|([\uD800-\uDFFF])|(['"`])|[^ !#-&\(-\[\]-_a-~]/g;
const jsesc = (argument, options) => {
const increaseIndentation = () => {
oldIndent = indent;
++options.indentLevel;
indent = options.indent.repeat(options.indentLevel)
};
// Handle options
const defaults = {
'escapeEverything': false,
'minimal': false,
'isScriptContext': false,
'quotes': 'single',
'wrap': false,
'es6': false,
'json': false,
'compact': true,
'lowercaseHex': false,
'numbers': 'decimal',
'indent': '\t',
'indentLevel': 0,
'__inline1__': false,
'__inline2__': false
};
const json = options && options.json;
if (json) {
defaults.quotes = 'double';
defaults.wrap = true;
}
options = extend(defaults, options);
if (
options.quotes != 'single' &&
options.quotes != 'double' &&
options.quotes != 'backtick'
) {
options.quotes = 'single';
}
const quote = options.quotes == 'double' ?
'"' :
(options.quotes == 'backtick' ?
'`' :
'\''
);
const compact = options.compact;
const lowercaseHex = options.lowercaseHex;
let indent = options.indent.repeat(options.indentLevel);
let oldIndent = '';
const inline1 = options.__inline1__;
const inline2 = options.__inline2__;
const newLine = compact ? '' : '\n';
let result;
let isEmpty = true;
const useBinNumbers = options.numbers == 'binary';
const useOctNumbers = options.numbers == 'octal';
const useDecNumbers = options.numbers == 'decimal';
const useHexNumbers = options.numbers == 'hexadecimal';
if (json && argument && isFunction(argument.toJSON)) {
argument = argument.toJSON();
}
if (!isString(argument)) {
if (isMap(argument)) {
if (argument.size == 0) {
return 'new Map()';
}
if (!compact) {
options.__inline1__ = true;
options.__inline2__ = false;
}
return 'new Map(' + jsesc(Array.from(argument), options) + ')';
}
if (isSet(argument)) {
if (argument.size == 0) {
return 'new Set()';
}
return 'new Set(' + jsesc(Array.from(argument), options) + ')';
}
if (isBuffer(argument)) {
if (argument.length == 0) {
return 'Buffer.from([])';
}
return 'Buffer.from(' + jsesc(Array.from(argument), options) + ')';
}
if (isArray(argument)) {
result = [];
options.wrap = true;
if (inline1) {
options.__inline1__ = false;
options.__inline2__ = true;
}
if (!inline2) {
increaseIndentation();
}
forEach(argument, (value) => {
isEmpty = false;
if (inline2) {
options.__inline2__ = false;
}
result.push(
(compact || inline2 ? '' : indent) +
jsesc(value, options)
);
});
if (isEmpty) {
return '[]';
}
if (inline2) {
return '[' + result.join(', ') + ']';
}
return '[' + newLine + result.join(',' + newLine) + newLine +
(compact ? '' : oldIndent) + ']';
} else if (isNumber(argument) || isBigInt(argument)) {
if (json) {
// Some number values (e.g. `Infinity`) cannot be represented in JSON.
// `BigInt` values less than `-Number.MAX_VALUE` or greater than
// `Number.MAX_VALUE` cannot be represented in JSON so they will become
// `-Infinity` or `Infinity`, respectively, and then become `null` when
// stringified.
return JSON.stringify(Number(argument));
}
let result;
if (useDecNumbers) {
result = String(argument);
} else if (useHexNumbers) {
let hexadecimal = argument.toString(16);
if (!lowercaseHex) {
hexadecimal = hexadecimal.toUpperCase();
}
result = '0x' + hexadecimal;
} else if (useBinNumbers) {
result = '0b' + argument.toString(2);
} else if (useOctNumbers) {
result = '0o' + argument.toString(8);
}
if (isBigInt(argument)) {
return result + 'n';
}
return result;
} else if (isBigInt(argument)) {
if (json) {
// `BigInt` values less than `-Number.MAX_VALUE` or greater than
// `Number.MAX_VALUE` will become `-Infinity` or `Infinity`,
// respectively, and cannot be represented in JSON.
return JSON.stringify(Number(argument));
}
return argument + 'n';
} else if (!isObject(argument)) {
if (json) {
// For some values (e.g. `undefined`, `function` objects),
// `JSON.stringify(value)` returns `undefined` (which isn’t valid
// JSON) instead of `'null'`.
return JSON.stringify(argument) || 'null';
}
return String(argument);
} else { // it’s an object
result = [];
options.wrap = true;
increaseIndentation();
forOwn(argument, (key, value) => {
isEmpty = false;
result.push(
(compact ? '' : indent) +
jsesc(key, options) + ':' +
(compact ? '' : ' ') +
jsesc(value, options)
);
});
if (isEmpty) {
return '{}';
}
return '{' + newLine + result.join(',' + newLine) + newLine +
(compact ? '' : oldIndent) + '}';
}
}
const regex = options.escapeEverything ? escapeEverythingRegex : escapeNonAsciiRegex;
result = argument.replace(regex, (char, pair, lone, quoteChar, index, string) => {
if (pair) {
if (options.minimal) return pair;
const first = pair.charCodeAt(0);
const second = pair.charCodeAt(1);
if (options.es6) {
// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
const codePoint = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
const hex = hexadecimal(codePoint, lowercaseHex);
return '\\u{' + hex + '}';
}
return fourHexEscape(hexadecimal(first, lowercaseHex)) + fourHexEscape(hexadecimal(second, lowercaseHex));
}
if (lone) {
return fourHexEscape(hexadecimal(lone.charCodeAt(0), lowercaseHex));
}
if (
char == '\0' &&
!json &&
!regexDigit.test(string.charAt(index + 1))
) {
return '\\0';
}
if (quoteChar) {
if (quoteChar == quote || options.escapeEverything) {
return '\\' + quoteChar;
}
return quoteChar;
}
if (regexSingleEscape.test(char)) {
// no need for a `hasOwnProperty` check here
return singleEscapes[char];
}
if (options.minimal && !regexWhitespace.test(char)) {
return char;
}
const hex = hexadecimal(char.charCodeAt(0), lowercaseHex);
if (json || hex.length > 2) {
return fourHexEscape(hex);
}
return '\\x' + ('00' + hex).slice(-2);
});
if (quote == '`') {
result = result.replace(/\$\{/g, '\\${');
}
if (options.isScriptContext) {
// https://mathiasbynens.be/notes/etago
result = result
.replace(/<\/(script|style)/gi, '<\\/$1')
.replace(/<!--/g, json ? '\\u003C!--' : '\\x3C!--');
}
if (options.wrap) {
result = quote + result + quote;
}
return result;
};
jsesc.version = '3.0.2';
module.exports = jsesc;