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1 year ago
'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 toString = object.toString;
const isArray = Array.isArray;
const isBuffer = Buffer.isBuffer;
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 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 regexWhitelist = /[ !#-&\(-\[\]-_a-~]/;
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)) {
if (json) {
// Some number values (e.g. `Infinity`) cannot be represented in JSON.
return JSON.stringify(argument);
}
if (useDecNumbers) {
return String(argument);
}
if (useHexNumbers) {
let hexadecimal = argument.toString(16);
if (!lowercaseHex) {
hexadecimal = hexadecimal.toUpperCase();
}
return '0x' + hexadecimal;
}
if (useBinNumbers) {
return '0b' + argument.toString(2);
}
if (useOctNumbers) {
return '0o' + argument.toString(8);
}
} 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 string = argument;
// Loop over each code unit in the string and escape it
let index = -1;
const length = string.length;
result = '';
while (++index < length) {
const character = string.charAt(index);
if (options.es6) {
const first = string.charCodeAt(index);
if ( // check if it’s the start of a surrogate pair
first >= 0xD800 && first <= 0xDBFF && // high surrogate
length > index + 1 // there is a next code unit
) {
const second = string.charCodeAt(index + 1);
if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate
// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
const codePoint = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
let hexadecimal = codePoint.toString(16);
if (!lowercaseHex) {
hexadecimal = hexadecimal.toUpperCase();
}
result += '\\u{' + hexadecimal + '}';
++index;
continue;
}
}
}
if (!options.escapeEverything) {
if (regexWhitelist.test(character)) {
// It’s a printable ASCII character that is not `"`, `'` or `\`,
// so don’t escape it.
result += character;
continue;
}
if (character == '"') {
result += quote == character ? '\\"' : character;
continue;
}
if (character == '`') {
result += quote == character ? '\\`' : character;
continue;
}
if (character == '\'') {
result += quote == character ? '\\\'' : character;
continue;
}
}
if (
character == '\0' &&
!json &&
!regexDigit.test(string.charAt(index + 1))
) {
result += '\\0';
continue;
}
if (regexSingleEscape.test(character)) {
// no need for a `hasOwnProperty` check here
result += singleEscapes[character];
continue;
}
const charCode = character.charCodeAt(0);
if (options.minimal && charCode != 0x2028 && charCode != 0x2029) {
result += character;
continue;
}
let hexadecimal = charCode.toString(16);
if (!lowercaseHex) {
hexadecimal = hexadecimal.toUpperCase();
}
const longhand = hexadecimal.length > 2 || json;
const escaped = '\\' + (longhand ? 'u' : 'x') +
('0000' + hexadecimal).slice(longhand ? -4 : -2);
result += escaped;
continue;
}
if (options.wrap) {
result = quote + result + quote;
}
if (quote == '`') {
result = result.replace(/\$\{/g, '\\\$\{');
}
if (options.isScriptContext) {
// https://mathiasbynens.be/notes/etago
return result
.replace(/<\/(script|style)/gi, '<\\/$1')
.replace(/<!--/g, json ? '\\u003C!--' : '\\x3C!--');
}
return result;
};
jsesc.version = '2.5.2';
module.exports = jsesc;