Mercurial > hg > ChinaGisRestApi
comparison gis_gui/lib/json2.js @ 63:7f008e782563
add gui files to product via FileSystemSite
author | casties |
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date | Fri, 05 Nov 2010 18:52:55 +0100 |
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62:3905385c8854 | 63:7f008e782563 |
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1 /* | |
2 http://www.JSON.org/json2.js | |
3 2010-08-25 | |
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 text = String(text); | |
437 cx.lastIndex = 0; | |
438 if (cx.test(text)) { | |
439 text = text.replace(cx, function (a) { | |
440 return '\\u' + | |
441 ('0000' + a.charCodeAt(0).toString(16)).slice(-4); | |
442 }); | |
443 } | |
444 | |
445 // In the second stage, we run the text against regular expressions that look | |
446 // for non-JSON patterns. We are especially concerned with '()' and 'new' | |
447 // because they can cause invocation, and '=' because it can cause mutation. | |
448 // But just to be safe, we want to reject all unexpected forms. | |
449 | |
450 // We split the second stage into 4 regexp operations in order to work around | |
451 // crippling inefficiencies in IE's and Safari's regexp engines. First we | |
452 // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we | |
453 // replace all simple value tokens with ']' characters. Third, we delete all | |
454 // open brackets that follow a colon or comma or that begin the text. Finally, | |
455 // we look to see that the remaining characters are only whitespace or ']' or | |
456 // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval. | |
457 | |
458 if (/^[\],:{}\s]*$/ | |
459 .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@') | |
460 .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']') | |
461 .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) { | |
462 | |
463 // In the third stage we use the eval function to compile the text into a | |
464 // JavaScript structure. The '{' operator is subject to a syntactic ambiguity | |
465 // in JavaScript: it can begin a block or an object literal. We wrap the text | |
466 // in parens to eliminate the ambiguity. | |
467 | |
468 j = eval('(' + text + ')'); | |
469 | |
470 // In the optional fourth stage, we recursively walk the new structure, passing | |
471 // each name/value pair to a reviver function for possible transformation. | |
472 | |
473 return typeof reviver === 'function' ? | |
474 walk({'': j}, '') : j; | |
475 } | |
476 | |
477 // If the text is not JSON parseable, then a SyntaxError is thrown. | |
478 | |
479 throw new SyntaxError('JSON.parse'); | |
480 }; | |
481 } | |
482 }()); |