319 lines
7.9 KiB
JavaScript
319 lines
7.9 KiB
JavaScript
'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 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)) {
|
||
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 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;
|