diff options
Diffstat (limited to 'chromium/third_party/node/node_modules/jsesc/jsesc.js')
| -rw-r--r-- | chromium/third_party/node/node_modules/jsesc/jsesc.js | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/chromium/third_party/node/node_modules/jsesc/jsesc.js b/chromium/third_party/node/node_modules/jsesc/jsesc.js new file mode 100644 index 00000000000..7b8b9236144 --- /dev/null +++ b/chromium/third_party/node/node_modules/jsesc/jsesc.js @@ -0,0 +1,329 @@ +'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; |