summaryrefslogtreecommitdiffstats
path: root/toolkit/modules/third_party/jsesc/jsesc.js
blob: 83390673bfa712dd2b92d954ede60c7093a54b82 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
/*
DO NOT TOUCH THIS FILE DIRECTLY. See the README for instructions.

Copyright Mathias Bynens <https://mathiasbynens.be/>

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

/* global jsesc */
/* exported jsesc */
var EXPORTED_SYMBOLS = ["jsesc"];
/*! https://mths.be/jsesc v1.0.0 by @mathias */
;(function(root) {

	// Detect free variables `exports`
	var freeExports = typeof exports == 'object' && exports;

	// Detect free variable `module`
	var freeModule = typeof module == 'object' && module &&
		module.exports == freeExports && module;

	// Detect free variable `global`, from Node.js or Browserified code,
	// and use it as `root`
	var freeGlobal = typeof global == 'object' && global;
	if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
		root = freeGlobal;
	}

	/*--------------------------------------------------------------------------*/

	var object = {};
	var hasOwnProperty = object.hasOwnProperty;
	var forOwn = function(object, callback) {
		var key;
		for (key in object) {
			if (hasOwnProperty.call(object, key)) {
				callback(key, object[key]);
			}
		}
	};

	var extend = function(destination, source) {
		if (!source) {
			return destination;
		}
		forOwn(source, function(key, value) {
			destination[key] = value;
		});
		return destination;
	};

	var forEach = function(array, callback) {
		var length = array.length;
		var index = -1;
		while (++index < length) {
			callback(array[index]);
		}
	};

	var toString = object.toString;
	var isArray = function(value) {
		return toString.call(value) == '[object Array]';
	};
	var isObject = function(value) {
		// This is a very simple check, but it’s good enough for what we need.
		return toString.call(value) == '[object Object]';
	};
	var isString = function(value) {
		return typeof value == 'string' ||
			toString.call(value) == '[object String]';
	};
	var isFunction = function(value) {
		// In a perfect world, the `typeof` check would be sufficient. However,
		// in Chrome 1–12, `typeof /x/ == 'object'`, and in IE 6–8
		// `typeof alert == 'object'` and similar for other host objects.
		return typeof value == 'function' ||
			toString.call(value) == '[object Function]';
	};

	/*--------------------------------------------------------------------------*/

	// https://mathiasbynens.be/notes/javascript-escapes#single
	var singleEscapes = {
		'"': '\\"',
		'\'': '\\\'',
		'\\': '\\\\',
		'\b': '\\b',
		'\f': '\\f',
		'\n': '\\n',
		'\r': '\\r',
		'\t': '\\t'
		// `\v` is omitted intentionally, because in IE < 9, '\v' == 'v'.
		// '\v': '\\x0B'
	};
	var regexSingleEscape = /["'\\\b\f\n\r\t]/;

	var regexDigit = /[0-9]/;
	var regexWhitelist = /[ !#-&\(-\[\]-~]/;

	var jsesc = function(argument, options) {
		// Handle options
		var defaults = {
			'escapeEverything': false,
			'quotes': 'single',
			'wrap': false,
			'es6': false,
			'json': false,
			'compact': true,
			'lowercaseHex': false,
			'indent': '\t',
			'__indent__': ''
		};
		var 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 = 'single';
		}
		var quote = options.quotes == 'double' ? '"' : '\'';
		var compact = options.compact;
		var indent = options.indent;
		var oldIndent;
		var newLine = compact ? '' : '\n';
		var result;
		var isEmpty = true;

		if (json && argument && isFunction(argument.toJSON)) {
			argument = argument.toJSON();
		}

		if (!isString(argument)) {
			if (isArray(argument)) {
				result = [];
				options.wrap = true;
				oldIndent = options.__indent__;
				indent += oldIndent;
				options.__indent__ = indent;
				forEach(argument, function(value) {
					isEmpty = false;
					result.push(
						(compact ? '' : indent) +
						jsesc(value, options)
					);
				});
				if (isEmpty) {
					return '[]';
				}
				return '[' + newLine + result.join(',' + newLine) + newLine +
					(compact ? '' : oldIndent) + ']';
			} 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;
				oldIndent = options.__indent__;
				indent += oldIndent;
				options.__indent__ = indent;
				forOwn(argument, function(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) + '}';
			}
		}

		var string = argument;
		// Loop over each code unit in the string and escape it
		var index = -1;
		var length = string.length;
		var first;
		var second;
		var codePoint;
		result = '';
		while (++index < length) {
			var character = string.charAt(index);
			if (options.es6) {
				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
				) {
					second = string.charCodeAt(index + 1);
					if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate
						// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
						codePoint = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
						var hexadecimal = codePoint.toString(16);
						if (!options.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 == '\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;
			}
			var charCode = character.charCodeAt(0);
			var hexadecimal = charCode.toString(16);
			if (!options.lowercaseHex) {
				hexadecimal = hexadecimal.toUpperCase();
			}
			var longhand = hexadecimal.length > 2 || json;
			var escaped = '\\' + (longhand ? 'u' : 'x') +
				('0000' + hexadecimal).slice(longhand ? -4 : -2);
			result += escaped;
			continue;
		}
		if (options.wrap) {
			result = quote + result + quote;
		}
		return result;
	};

	jsesc.version = '1.0.0';

	/*--------------------------------------------------------------------------*/

	// Some AMD build optimizers, like r.js, check for specific condition patterns
	// like the following:
	if (
		typeof define == 'function' &&
		typeof define.amd == 'object' &&
		define.amd
	) {
		define(function() {
			return jsesc;
		});
	}	else if (freeExports && !freeExports.nodeType) {
		if (freeModule) { // in Node.js or RingoJS v0.8.0+
			freeModule.exports = jsesc;
		} else { // in Narwhal or RingoJS v0.7.0-
			freeExports.jsesc = jsesc;
		}
	} else { // in Rhino or a web browser
		root.jsesc = jsesc;
	}

}(this));