source: trip-planner-front/node_modules/jsesc/jsesc.js@ b738035

Last change on this file since b738035 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 8.2 KB
Line 
1'use strict';
2
3const object = {};
4const hasOwnProperty = object.hasOwnProperty;
5const forOwn = (object, callback) => {
6 for (const key in object) {
7 if (hasOwnProperty.call(object, key)) {
8 callback(key, object[key]);
9 }
10 }
11};
12
13const extend = (destination, source) => {
14 if (!source) {
15 return destination;
16 }
17 forOwn(source, (key, value) => {
18 destination[key] = value;
19 });
20 return destination;
21};
22
23const forEach = (array, callback) => {
24 const length = array.length;
25 let index = -1;
26 while (++index < length) {
27 callback(array[index]);
28 }
29};
30
31const toString = object.toString;
32const isArray = Array.isArray;
33const isBuffer = Buffer.isBuffer;
34const isObject = (value) => {
35 // This is a very simple check, but it’s good enough for what we need.
36 return toString.call(value) == '[object Object]';
37};
38const isString = (value) => {
39 return typeof value == 'string' ||
40 toString.call(value) == '[object String]';
41};
42const isNumber = (value) => {
43 return typeof value == 'number' ||
44 toString.call(value) == '[object Number]';
45};
46const isFunction = (value) => {
47 return typeof value == 'function';
48};
49const isMap = (value) => {
50 return toString.call(value) == '[object Map]';
51};
52const isSet = (value) => {
53 return toString.call(value) == '[object Set]';
54};
55
56/*--------------------------------------------------------------------------*/
57
58// https://mathiasbynens.be/notes/javascript-escapes#single
59const singleEscapes = {
60 '"': '\\"',
61 '\'': '\\\'',
62 '\\': '\\\\',
63 '\b': '\\b',
64 '\f': '\\f',
65 '\n': '\\n',
66 '\r': '\\r',
67 '\t': '\\t'
68 // `\v` is omitted intentionally, because in IE < 9, '\v' == 'v'.
69 // '\v': '\\x0B'
70};
71const regexSingleEscape = /["'\\\b\f\n\r\t]/;
72
73const regexDigit = /[0-9]/;
74const regexWhitelist = /[ !#-&\(-\[\]-_a-~]/;
75
76const jsesc = (argument, options) => {
77 const increaseIndentation = () => {
78 oldIndent = indent;
79 ++options.indentLevel;
80 indent = options.indent.repeat(options.indentLevel)
81 };
82 // Handle options
83 const defaults = {
84 'escapeEverything': false,
85 'minimal': false,
86 'isScriptContext': false,
87 'quotes': 'single',
88 'wrap': false,
89 'es6': false,
90 'json': false,
91 'compact': true,
92 'lowercaseHex': false,
93 'numbers': 'decimal',
94 'indent': '\t',
95 'indentLevel': 0,
96 '__inline1__': false,
97 '__inline2__': false
98 };
99 const json = options && options.json;
100 if (json) {
101 defaults.quotes = 'double';
102 defaults.wrap = true;
103 }
104 options = extend(defaults, options);
105 if (
106 options.quotes != 'single' &&
107 options.quotes != 'double' &&
108 options.quotes != 'backtick'
109 ) {
110 options.quotes = 'single';
111 }
112 const quote = options.quotes == 'double' ?
113 '"' :
114 (options.quotes == 'backtick' ?
115 '`' :
116 '\''
117 );
118 const compact = options.compact;
119 const lowercaseHex = options.lowercaseHex;
120 let indent = options.indent.repeat(options.indentLevel);
121 let oldIndent = '';
122 const inline1 = options.__inline1__;
123 const inline2 = options.__inline2__;
124 const newLine = compact ? '' : '\n';
125 let result;
126 let isEmpty = true;
127 const useBinNumbers = options.numbers == 'binary';
128 const useOctNumbers = options.numbers == 'octal';
129 const useDecNumbers = options.numbers == 'decimal';
130 const useHexNumbers = options.numbers == 'hexadecimal';
131
132 if (json && argument && isFunction(argument.toJSON)) {
133 argument = argument.toJSON();
134 }
135
136 if (!isString(argument)) {
137 if (isMap(argument)) {
138 if (argument.size == 0) {
139 return 'new Map()';
140 }
141 if (!compact) {
142 options.__inline1__ = true;
143 options.__inline2__ = false;
144 }
145 return 'new Map(' + jsesc(Array.from(argument), options) + ')';
146 }
147 if (isSet(argument)) {
148 if (argument.size == 0) {
149 return 'new Set()';
150 }
151 return 'new Set(' + jsesc(Array.from(argument), options) + ')';
152 }
153 if (isBuffer(argument)) {
154 if (argument.length == 0) {
155 return 'Buffer.from([])';
156 }
157 return 'Buffer.from(' + jsesc(Array.from(argument), options) + ')';
158 }
159 if (isArray(argument)) {
160 result = [];
161 options.wrap = true;
162 if (inline1) {
163 options.__inline1__ = false;
164 options.__inline2__ = true;
165 }
166 if (!inline2) {
167 increaseIndentation();
168 }
169 forEach(argument, (value) => {
170 isEmpty = false;
171 if (inline2) {
172 options.__inline2__ = false;
173 }
174 result.push(
175 (compact || inline2 ? '' : indent) +
176 jsesc(value, options)
177 );
178 });
179 if (isEmpty) {
180 return '[]';
181 }
182 if (inline2) {
183 return '[' + result.join(', ') + ']';
184 }
185 return '[' + newLine + result.join(',' + newLine) + newLine +
186 (compact ? '' : oldIndent) + ']';
187 } else if (isNumber(argument)) {
188 if (json) {
189 // Some number values (e.g. `Infinity`) cannot be represented in JSON.
190 return JSON.stringify(argument);
191 }
192 if (useDecNumbers) {
193 return String(argument);
194 }
195 if (useHexNumbers) {
196 let hexadecimal = argument.toString(16);
197 if (!lowercaseHex) {
198 hexadecimal = hexadecimal.toUpperCase();
199 }
200 return '0x' + hexadecimal;
201 }
202 if (useBinNumbers) {
203 return '0b' + argument.toString(2);
204 }
205 if (useOctNumbers) {
206 return '0o' + argument.toString(8);
207 }
208 } else if (!isObject(argument)) {
209 if (json) {
210 // For some values (e.g. `undefined`, `function` objects),
211 // `JSON.stringify(value)` returns `undefined` (which isn’t valid
212 // JSON) instead of `'null'`.
213 return JSON.stringify(argument) || 'null';
214 }
215 return String(argument);
216 } else { // it’s an object
217 result = [];
218 options.wrap = true;
219 increaseIndentation();
220 forOwn(argument, (key, value) => {
221 isEmpty = false;
222 result.push(
223 (compact ? '' : indent) +
224 jsesc(key, options) + ':' +
225 (compact ? '' : ' ') +
226 jsesc(value, options)
227 );
228 });
229 if (isEmpty) {
230 return '{}';
231 }
232 return '{' + newLine + result.join(',' + newLine) + newLine +
233 (compact ? '' : oldIndent) + '}';
234 }
235 }
236
237 const string = argument;
238 // Loop over each code unit in the string and escape it
239 let index = -1;
240 const length = string.length;
241 result = '';
242 while (++index < length) {
243 const character = string.charAt(index);
244 if (options.es6) {
245 const first = string.charCodeAt(index);
246 if ( // check if it’s the start of a surrogate pair
247 first >= 0xD800 && first <= 0xDBFF && // high surrogate
248 length > index + 1 // there is a next code unit
249 ) {
250 const second = string.charCodeAt(index + 1);
251 if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate
252 // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
253 const codePoint = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
254 let hexadecimal = codePoint.toString(16);
255 if (!lowercaseHex) {
256 hexadecimal = hexadecimal.toUpperCase();
257 }
258 result += '\\u{' + hexadecimal + '}';
259 ++index;
260 continue;
261 }
262 }
263 }
264 if (!options.escapeEverything) {
265 if (regexWhitelist.test(character)) {
266 // It’s a printable ASCII character that is not `"`, `'` or `\`,
267 // so don’t escape it.
268 result += character;
269 continue;
270 }
271 if (character == '"') {
272 result += quote == character ? '\\"' : character;
273 continue;
274 }
275 if (character == '`') {
276 result += quote == character ? '\\`' : character;
277 continue;
278 }
279 if (character == '\'') {
280 result += quote == character ? '\\\'' : character;
281 continue;
282 }
283 }
284 if (
285 character == '\0' &&
286 !json &&
287 !regexDigit.test(string.charAt(index + 1))
288 ) {
289 result += '\\0';
290 continue;
291 }
292 if (regexSingleEscape.test(character)) {
293 // no need for a `hasOwnProperty` check here
294 result += singleEscapes[character];
295 continue;
296 }
297 const charCode = character.charCodeAt(0);
298 if (options.minimal && charCode != 0x2028 && charCode != 0x2029) {
299 result += character;
300 continue;
301 }
302 let hexadecimal = charCode.toString(16);
303 if (!lowercaseHex) {
304 hexadecimal = hexadecimal.toUpperCase();
305 }
306 const longhand = hexadecimal.length > 2 || json;
307 const escaped = '\\' + (longhand ? 'u' : 'x') +
308 ('0000' + hexadecimal).slice(longhand ? -4 : -2);
309 result += escaped;
310 continue;
311 }
312 if (options.wrap) {
313 result = quote + result + quote;
314 }
315 if (quote == '`') {
316 result = result.replace(/\$\{/g, '\\\$\{');
317 }
318 if (options.isScriptContext) {
319 // https://mathiasbynens.be/notes/etago
320 return result
321 .replace(/<\/(script|style)/gi, '<\\/$1')
322 .replace(/<!--/g, json ? '\\u003C!--' : '\\x3C!--');
323 }
324 return result;
325};
326
327jsesc.version = '2.5.2';
328
329module.exports = jsesc;
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