root / drupal7 / sites / all / modules / media / js / util / json2.js @ 01f36513
1 | 85ad3d82 | Assos Assos | /*
|
---|---|---|---|
2 | http://www.JSON.org/json2.js
|
||
3 | 2009-09-29
|
||
4 | |||
5 | Public Domain.
|
||
6 | |||
7 | NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
|
||
8 | |||
9 | See http://www.JSON.org/js.html
|
||
10 | |||
11 | |||
12 | This code should be minified before deployment.
|
||
13 | See http://javascript.crockford.com/jsmin.html
|
||
14 | |||
15 | USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
|
||
16 | NOT CONTROL.
|
||
17 | |||
18 | |||
19 | This file creates a global JSON object containing two methods: stringify
|
||
20 | and parse.
|
||
21 | |||
22 | JSON.stringify(value, replacer, space)
|
||
23 | value any JavaScript value, usually an object or array.
|
||
24 | |||
25 | replacer an optional parameter that determines how object
|
||
26 | values are stringified for objects. It can be a
|
||
27 | function or an array of strings.
|
||
28 | |||
29 | space an optional parameter that specifies the indentation
|
||
30 | of nested structures. If it is omitted, the text will
|
||
31 | be packed without extra whitespace. If it is a number,
|
||
32 | it will specify the number of spaces to indent at each
|
||
33 | level. If it is a string (such as '\t' or ' '),
|
||
34 | it contains the characters used to indent at each level.
|
||
35 | |||
36 | This method produces a JSON text from a JavaScript value.
|
||
37 | |||
38 | When an object value is found, if the object contains a toJSON
|
||
39 | method, its toJSON method will be called and the result will be
|
||
40 | stringified. A toJSON method does not serialize: it returns the
|
||
41 | value represented by the name/value pair that should be serialized,
|
||
42 | or undefined if nothing should be serialized. The toJSON method
|
||
43 | will be passed the key associated with the value, and this will be
|
||
44 | bound to the value
|
||
45 | |||
46 | For example, this would serialize Dates as ISO strings.
|
||
47 | |||
48 | Date.prototype.toJSON = function (key) {
|
||
49 | function f(n) {
|
||
50 | // Format integers to have at least two digits.
|
||
51 | return n < 10 ? '0' + n : n;
|
||
52 | }
|
||
53 | |||
54 | return this.getUTCFullYear() + '-' +
|
||
55 | f(this.getUTCMonth() + 1) + '-' +
|
||
56 | f(this.getUTCDate()) + 'T' +
|
||
57 | f(this.getUTCHours()) + ':' +
|
||
58 | f(this.getUTCMinutes()) + ':' +
|
||
59 | f(this.getUTCSeconds()) + 'Z';
|
||
60 | };
|
||
61 | |||
62 | You can provide an optional replacer method. It will be passed the
|
||
63 | key and value of each member, with this bound to the containing
|
||
64 | object. The value that is returned from your method will be
|
||
65 | serialized. If your method returns undefined, then the member will
|
||
66 | be excluded from the serialization.
|
||
67 | |||
68 | If the replacer parameter is an array of strings, then it will be
|
||
69 | used to select the members to be serialized. It filters the results
|
||
70 | such that only members with keys listed in the replacer array are
|
||
71 | stringified.
|
||
72 | |||
73 | Values that do not have JSON representations, such as undefined or
|
||
74 | functions, will not be serialized. Such values in objects will be
|
||
75 | dropped; in arrays they will be replaced with null. You can use
|
||
76 | a replacer function to replace those with JSON values.
|
||
77 | JSON.stringify(undefined) returns undefined.
|
||
78 | |||
79 | The optional space parameter produces a stringification of the
|
||
80 | value that is filled with line breaks and indentation to make it
|
||
81 | easier to read.
|
||
82 | |||
83 | If the space parameter is a non-empty string, then that string will
|
||
84 | be used for indentation. If the space parameter is a number, then
|
||
85 | the indentation will be that many spaces.
|
||
86 | |||
87 | Example:
|
||
88 | |||
89 | text = JSON.stringify(['e', {pluribus: 'unum'}]);
|
||
90 | // text is '["e",{"pluribus":"unum"}]'
|
||
91 | |||
92 | |||
93 | text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
|
||
94 | // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
|
||
95 | |||
96 | text = JSON.stringify([new Date()], function (key, value) {
|
||
97 | return this[key] instanceof Date ?
|
||
98 | 'Date(' + this[key] + ')' : value;
|
||
99 | });
|
||
100 | // text is '["Date(---current time---)"]'
|
||
101 | |||
102 | |||
103 | JSON.parse(text, reviver)
|
||
104 | This method parses a JSON text to produce an object or array.
|
||
105 | It can throw a SyntaxError exception.
|
||
106 | |||
107 | The optional reviver parameter is a function that can filter and
|
||
108 | transform the results. It receives each of the keys and values,
|
||
109 | and its return value is used instead of the original value.
|
||
110 | If it returns what it received, then the structure is not modified.
|
||
111 | If it returns undefined then the member is deleted.
|
||
112 | |||
113 | Example:
|
||
114 | |||
115 | // Parse the text. Values that look like ISO date strings will
|
||
116 | // be converted to Date objects.
|
||
117 | |||
118 | myData = JSON.parse(text, function (key, value) {
|
||
119 | var a;
|
||
120 | if (typeof value === 'string') {
|
||
121 | a =
|
||
122 | /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
|
||
123 | if (a) {
|
||
124 | return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
|
||
125 | +a[5], +a[6]));
|
||
126 | }
|
||
127 | }
|
||
128 | return value;
|
||
129 | });
|
||
130 | |||
131 | myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
|
||
132 | var d;
|
||
133 | if (typeof value === 'string' &&
|
||
134 | value.slice(0, 5) === 'Date(' &&
|
||
135 | value.slice(-1) === ')') {
|
||
136 | d = new Date(value.slice(5, -1));
|
||
137 | if (d) {
|
||
138 | return d;
|
||
139 | }
|
||
140 | }
|
||
141 | return value;
|
||
142 | });
|
||
143 | |||
144 | |||
145 | This is a reference implementation. You are free to copy, modify, or
|
||
146 | redistribute.
|
||
147 | */
|
||
148 | |||
149 | /*jslint evil: true, strict: false */
|
||
150 | |||
151 | /*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
|
||
152 | call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
|
||
153 | getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
|
||
154 | lastIndex, length, parse, prototype, push, replace, slice, stringify,
|
||
155 | test, toJSON, toString, valueOf
|
||
156 | */
|
||
157 | |||
158 | |||
159 | // Create a JSON object only if one does not already exist. We create the
|
||
160 | // methods in a closure to avoid creating global variables.
|
||
161 | |||
162 | if (!this.JSON) { |
||
163 | this.JSON = {};
|
||
164 | } |
||
165 | |||
166 | (function () {
|
||
167 | |||
168 | function f(n) { |
||
169 | // Format integers to have at least two digits.
|
||
170 | return n < 10 ? '0' + n : n; |
||
171 | } |
||
172 | |||
173 | if (typeof Date.prototype.toJSON !== 'function') { |
||
174 | |||
175 | Date.prototype.toJSON = function (key) { |
||
176 | |||
177 | return isFinite(this.valueOf()) ? |
||
178 | this.getUTCFullYear() + '-' + |
||
179 | f(this.getUTCMonth() + 1) + '-' + |
||
180 | f(this.getUTCDate()) + 'T' + |
||
181 | f(this.getUTCHours()) + ':' + |
||
182 | f(this.getUTCMinutes()) + ':' + |
||
183 | f(this.getUTCSeconds()) + 'Z' : null; |
||
184 | }; |
||
185 | |||
186 | String.prototype.toJSON = |
||
187 | Number.prototype.toJSON = |
||
188 | Boolean.prototype.toJSON = function (key) { |
||
189 | return this.valueOf(); |
||
190 | }; |
||
191 | } |
||
192 | |||
193 | var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g, |
||
194 | escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
|
||
195 | gap, |
||
196 | indent, |
||
197 | meta = { // table of character substitutions
|
||
198 | '\b': '\\b', |
||
199 | '\t': '\\t', |
||
200 | '\n': '\\n', |
||
201 | '\f': '\\f', |
||
202 | '\r': '\\r', |
||
203 | '"' : '\\"', |
||
204 | '\\': '\\\\' |
||
205 | }, |
||
206 | rep; |
||
207 | |||
208 | |||
209 | function quote(string) { |
||
210 | |||
211 | // If the string contains no control characters, no quote characters, and no
|
||
212 | // backslash characters, then we can safely slap some quotes around it.
|
||
213 | // Otherwise we must also replace the offending characters with safe escape
|
||
214 | // sequences.
|
||
215 | |||
216 | escapable.lastIndex = 0;
|
||
217 | return escapable.test(string) ?
|
||
218 | '"' + string.replace(escapable, function (a) { |
||
219 | var c = meta[a];
|
||
220 | return typeof c === 'string' ? c : |
||
221 | '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4); |
||
222 | }) + '"' :
|
||
223 | '"' + string + '"'; |
||
224 | } |
||
225 | |||
226 | |||
227 | function str(key, holder) { |
||
228 | |||
229 | // Produce a string from holder[key].
|
||
230 | |||
231 | var i, // The loop counter. |
||
232 | k, // The member key.
|
||
233 | v, // The member value.
|
||
234 | length, |
||
235 | mind = gap, |
||
236 | partial, |
||
237 | value = holder[key]; |
||
238 | |||
239 | // If the value has a toJSON method, call it to obtain a replacement value.
|
||
240 | |||
241 | if (value && typeof value === 'object' && |
||
242 | typeof value.toJSON === 'function') { |
||
243 | value = value.toJSON(key); |
||
244 | } |
||
245 | |||
246 | // If we were called with a replacer function, then call the replacer to
|
||
247 | // obtain a replacement value.
|
||
248 | |||
249 | if (typeof rep === 'function') { |
||
250 | value = rep.call(holder, key, value); |
||
251 | } |
||
252 | |||
253 | // What happens next depends on the value's type.
|
||
254 | |||
255 | switch (typeof value) { |
||
256 | case 'string': |
||
257 | return quote(value);
|
||
258 | |||
259 | case 'number': |
||
260 | |||
261 | // JSON numbers must be finite. Encode non-finite numbers as null.
|
||
262 | |||
263 | return isFinite(value) ? String(value) : 'null'; |
||
264 | |||
265 | case 'boolean': |
||
266 | case 'null': |
||
267 | |||
268 | // If the value is a boolean or null, convert it to a string. Note:
|
||
269 | // typeof null does not produce 'null'. The case is included here in
|
||
270 | // the remote chance that this gets fixed someday.
|
||
271 | |||
272 | return String(value);
|
||
273 | |||
274 | // If the type is 'object', we might be dealing with an object or an array or
|
||
275 | // null.
|
||
276 | |||
277 | case 'object': |
||
278 | |||
279 | // Due to a specification blunder in ECMAScript, typeof null is 'object',
|
||
280 | // so watch out for that case.
|
||
281 | |||
282 | if (!value) {
|
||
283 | return 'null'; |
||
284 | } |
||
285 | |||
286 | // Make an array to hold the partial results of stringifying this object value.
|
||
287 | |||
288 | gap += indent; |
||
289 | partial = []; |
||
290 | |||
291 | // Is the value an array?
|
||
292 | |||
293 | if (Object.prototype.toString.apply(value) === '[object Array]') { |
||
294 | |||
295 | // The value is an array. Stringify every element. Use null as a placeholder
|
||
296 | // for non-JSON values.
|
||
297 | |||
298 | length = value.length; |
||
299 | for (i = 0; i < length; i += 1) { |
||
300 | partial[i] = str(i, value) || 'null';
|
||
301 | } |
||
302 | |||
303 | // Join all of the elements together, separated with commas, and wrap them in
|
||
304 | // brackets.
|
||
305 | |||
306 | v = partial.length === 0 ? '[]' : |
||
307 | gap ? '[\n' + gap +
|
||
308 | partial.join(',\n' + gap) + '\n' + |
||
309 | mind + ']' :
|
||
310 | '[' + partial.join(',') + ']'; |
||
311 | gap = mind; |
||
312 | return v;
|
||
313 | } |
||
314 | |||
315 | // If the replacer is an array, use it to select the members to be stringified.
|
||
316 | |||
317 | if (rep && typeof rep === 'object') { |
||
318 | length = rep.length; |
||
319 | for (i = 0; i < length; i += 1) { |
||
320 | k = rep[i]; |
||
321 | if (typeof k === 'string') { |
||
322 | v = str(k, value); |
||
323 | if (v) {
|
||
324 | partial.push(quote(k) + (gap ? ': ' : ':') + v); |
||
325 | } |
||
326 | } |
||
327 | } |
||
328 | } else {
|
||
329 | |||
330 | // Otherwise, iterate through all of the keys in the object.
|
||
331 | |||
332 | for (k in value) { |
||
333 | if (Object.hasOwnProperty.call(value, k)) {
|
||
334 | v = str(k, value); |
||
335 | if (v) {
|
||
336 | partial.push(quote(k) + (gap ? ': ' : ':') + v); |
||
337 | } |
||
338 | } |
||
339 | } |
||
340 | } |
||
341 | |||
342 | // Join all of the member texts together, separated with commas,
|
||
343 | // and wrap them in braces.
|
||
344 | |||
345 | v = partial.length === 0 ? '{}' : |
||
346 | gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + |
||
347 | mind + '}' : '{' + partial.join(',') + '}'; |
||
348 | gap = mind; |
||
349 | return v;
|
||
350 | } |
||
351 | } |
||
352 | |||
353 | // If the JSON object does not yet have a stringify method, give it one.
|
||
354 | |||
355 | if (typeof JSON.stringify !== 'function') { |
||
356 | JSON.stringify = function (value, replacer, space) { |
||
357 | |||
358 | // The stringify method takes a value and an optional replacer, and an optional
|
||
359 | // space parameter, and returns a JSON text. The replacer can be a function
|
||
360 | // that can replace values, or an array of strings that will select the keys.
|
||
361 | // A default replacer method can be provided. Use of the space parameter can
|
||
362 | // produce text that is more easily readable.
|
||
363 | |||
364 | var i;
|
||
365 | gap = '';
|
||
366 | indent = '';
|
||
367 | |||
368 | // If the space parameter is a number, make an indent string containing that
|
||
369 | // many spaces.
|
||
370 | |||
371 | if (typeof space === 'number') { |
||
372 | for (i = 0; i < space; i += 1) { |
||
373 | indent += ' ';
|
||
374 | } |
||
375 | |||
376 | // If the space parameter is a string, it will be used as the indent string.
|
||
377 | |||
378 | } else if (typeof space === 'string') { |
||
379 | indent = space; |
||
380 | } |
||
381 | |||
382 | // If there is a replacer, it must be a function or an array.
|
||
383 | // Otherwise, throw an error.
|
||
384 | |||
385 | rep = replacer; |
||
386 | if (replacer && typeof replacer !== 'function' && |
||
387 | (typeof replacer !== 'object' || |
||
388 | typeof replacer.length !== 'number')) { |
||
389 | throw new Error('JSON.stringify'); |
||
390 | } |
||
391 | |||
392 | // Make a fake root object containing our value under the key of ''.
|
||
393 | // Return the result of stringifying the value.
|
||
394 | |||
395 | return str('', {'': value}); |
||
396 | }; |
||
397 | } |
||
398 | |||
399 | |||
400 | // If the JSON object does not yet have a parse method, give it one.
|
||
401 | |||
402 | if (typeof JSON.parse !== 'function') { |
||
403 | JSON.parse = function (text, reviver) { |
||
404 | |||
405 | // The parse method takes a text and an optional reviver function, and returns
|
||
406 | // a JavaScript value if the text is a valid JSON text.
|
||
407 | |||
408 | var j;
|
||
409 | |||
410 | function walk(holder, key) { |
||
411 | |||
412 | // The walk method is used to recursively walk the resulting structure so
|
||
413 | // that modifications can be made.
|
||
414 | |||
415 | var k, v, value = holder[key];
|
||
416 | if (value && typeof value === 'object') { |
||
417 | for (k in value) { |
||
418 | if (Object.hasOwnProperty.call(value, k)) {
|
||
419 | v = walk(value, k); |
||
420 | if (v !== undefined) { |
||
421 | value[k] = v; |
||
422 | } else {
|
||
423 | delete value[k];
|
||
424 | } |
||
425 | } |
||
426 | } |
||
427 | } |
||
428 | return reviver.call(holder, key, value);
|
||
429 | } |
||
430 | |||
431 | |||
432 | // Parsing happens in four stages. In the first stage, we replace certain
|
||
433 | // Unicode characters with escape sequences. JavaScript handles many characters
|
||
434 | // incorrectly, either silently deleting them, or treating them as line endings.
|
||
435 | |||
436 | cx.lastIndex = 0;
|
||
437 | if (cx.test(text)) {
|
||
438 | text = text.replace(cx, function (a) {
|
||
439 | return '\\u' + |
||
440 | ('0000' + a.charCodeAt(0).toString(16)).slice(-4); |
||
441 | }); |
||
442 | } |
||
443 | |||
444 | // In the second stage, we run the text against regular expressions that look
|
||
445 | // for non-JSON patterns. We are especially concerned with '()' and 'new'
|
||
446 | // because they can cause invocation, and '=' because it can cause mutation.
|
||
447 | // But just to be safe, we want to reject all unexpected forms.
|
||
448 | |||
449 | // We split the second stage into 4 regexp operations in order to work around
|
||
450 | // crippling inefficiencies in IE's and Safari's regexp engines. First we
|
||
451 | // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
|
||
452 | // replace all simple value tokens with ']' characters. Third, we delete all
|
||
453 | // open brackets that follow a colon or comma or that begin the text. Finally,
|
||
454 | // we look to see that the remaining characters are only whitespace or ']' or
|
||
455 | // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
|
||
456 | |||
457 | if (/^[\],:{}\s]*$/. |
||
458 | test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@'). |
||
459 | replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']'). |
||
460 | replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) { |
||
461 | |||
462 | // In the third stage we use the eval function to compile the text into a
|
||
463 | // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
|
||
464 | // in JavaScript: it can begin a block or an object literal. We wrap the text
|
||
465 | // in parens to eliminate the ambiguity.
|
||
466 | |||
467 | j = eval('(' + text + ')'); |
||
468 | |||
469 | // In the optional fourth stage, we recursively walk the new structure, passing
|
||
470 | // each name/value pair to a reviver function for possible transformation.
|
||
471 | |||
472 | return typeof reviver === 'function' ? |
||
473 | walk({'': j}, '') : j; |
||
474 | } |
||
475 | |||
476 | // If the text is not JSON parseable, then a SyntaxError is thrown.
|
||
477 | |||
478 | throw new SyntaxError('JSON.parse'); |
||
479 | }; |
||
480 | } |
||
481 | }()); |