2
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
3
Code licensed under the BSD License:
4
http://developer.yahoo.net/yui/license.txt
7
YUI.add('json-parse', function(Y) {
10
* The JSON Utility provides methods to serialize JavaScript objects into
11
* JSON strings and parse JavaScript objects from strings containing JSON data.
12
* Three modules are available for inclusion:
14
* <li>1. <code>json-parse</code> for parsing JSON strings into native JavaScript data</li>
15
* <li>2. <code>json-stringify</code> for stringification of JavaScript objects into JSON strings</li>
16
* <li>3. <code>json</code> for both parsing and stringification</li>
19
* Both <code>json-parse</code> and <code>json-stringify</code> create functions in a static JSON class under your YUI instance (e.g. Y.JSON.parse(..)).
26
* Provides Y.JSON.parse method to take JSON strings and return native
29
* @submodule json-parse
33
Y.JSON = Y.JSON || {};
35
// All internals kept private for security reasons
38
* Replace certain Unicode characters that JavaScript may handle incorrectly
39
* during eval--either by deleting them or treating them as line endings--with
41
* IMPORTANT NOTE: This regex will be used to modify the input if a match is
43
* @property _UNICODE_EXCEPTIONS
47
var _UNICODE_EXCEPTIONS = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
51
* First step in the validation. Regex used to replace all escape
52
* sequences (i.e. "\\", etc) with '@' characters (a non-JSON character).
57
_ESCAPES = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,
60
* Second step in the validation. Regex used to replace all simple
61
* values with ']' characters.
66
_VALUES = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
69
* Third step in the validation. Regex used to remove all open square
70
* brackets following a colon, comma, or at the beginning of the string.
76
_BRACKETS = /(?:^|:|,)(?:\s*\[)+/g,
79
* Final step in the validation. Regex used to test the string left after
80
* all previous replacements for invalid characters.
85
_INVALID = /^[\],:{}\s]*$/,
87
has = Object.prototype.hasOwnProperty,
89
* Traverses nested objects, applying a reviver function to each (key,value)
90
* from the scope if the key:value's containing object. The value returned
91
* from the function will replace the original value in the key:value pair.
92
* If the value returned is undefined, the key will be omitted from the
95
* @param data {MIXED} Any JavaScript data
96
* @param reviver {Function} filter or mutation function
97
* @return {MIXED} The results of the filtered data
100
_revive = function (data, reviver) {
101
var walk = function (o,key) {
102
var k,v,value = o[key];
103
if (value && typeof value === 'object') {
105
if (has.call(value,k)) {
107
if (v === undefined) {
115
return reviver.call(o,key,value);
118
return typeof reviver === 'function' ? walk({'':data},'') : data;
122
* Parse a JSON string, returning the native JavaScript representation.
123
* @param s {string} JSON string data
124
* @param reviver {function} (optional) function(k,v) passed each key value pair of object literals, allowing pruning or altering values
125
* @return {MIXED} the native JavaScript representation of the JSON string
126
* @throws SyntaxError
131
Y.JSON.parse = function (s,reviver) {
133
if (typeof s === 'string') {
134
// Replace certain Unicode characters that are otherwise handled
135
// incorrectly by some browser implementations.
136
// NOTE: This modifies the input if such characters are found!
137
s = s.replace(_UNICODE_EXCEPTIONS, function (c) {
138
return '\\u'+('0000'+(+(c.charCodeAt(0))).toString(16)).slice(-4);
142
if (_INVALID.test(s.replace(_ESCAPES,'@').
143
replace(_VALUES,']').
144
replace(_BRACKETS,''))) {
146
// Eval the text into a JavaScript data structure, apply any
147
// reviver function, and return
148
return _revive( eval('(' + s + ')'), reviver );
152
// The text is not JSON parsable
153
throw new SyntaxError('parseJSON');
158
YUI.add('json-stringify', function(Y) {
161
* Provides Y.JSON.stringify method for converting objects to JSON strings.
163
* @submodule json-stringify
167
var isA = Y.Lang.isArray;
169
Y.JSON = Y.JSON || {};
173
* Regex used to capture characters that need escaping before enclosing
174
* their containing string in quotes.
175
* @property _SPECIAL_CHARS
179
_SPECIAL_CHARS : /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
182
* Character substitution map for common escapes and special characters.
199
* Serializes a Date instance as a UTC date string. Used internally by
200
* stringify. Override this method if you need Dates serialized in a
202
* @method dateToString
203
* @param d {Date} The Date to serialize
204
* @return {String} stringified Date in UTC format YYYY-MM-DDTHH:mm:SSZ
207
dateToString : function (d) {
208
function _zeroPad(v) {
209
return v < 10 ? '0' + v : v;
212
return '"' + d.getUTCFullYear() + '-' +
213
_zeroPad(d.getUTCMonth() + 1) + '-' +
214
_zeroPad(d.getUTCDate()) + 'T' +
215
_zeroPad(d.getUTCHours()) + ':' +
216
_zeroPad(d.getUTCMinutes()) + ':' +
217
_zeroPad(d.getUTCSeconds()) + 'Z"';
221
* Converts an arbitrary value to a JSON string representation.
222
* Cyclical object or array references are replaced with null.
223
* If a whitelist is provided, only matching object keys will be included.
224
* If a depth limit is provided, objects and arrays at that depth will
225
* be stringified as empty.
227
* @param o {MIXED} any arbitrary object to convert to JSON string
228
* @param w {Array|Function} (optional) whitelist of acceptable object
229
* keys to include, or a replacer function to modify the
230
* raw value before serialization
231
* @param d {number} (optional) depth limit to recurse objects/arrays
232
* (practical minimum 1)
233
* @return {string} JSON string representation of the input
237
stringify : function (o,w,d) {
239
var m = Y.JSON._CHARS,
240
str_re = Y.JSON._SPECIAL_CHARS,
241
rep = typeof w === 'function' ? w : null,
242
pstack = []; // Processing stack used for cyclical ref protection
244
if (rep || typeof w !== 'object') {
248
// escape encode special characters
249
var _char = function (c) {
251
m[c]='\\u'+('0000'+(+(c.charCodeAt(0))).toString(16)).slice(-4);
256
// Enclose the escaped string in double quotes
257
var _string = function (s) {
258
return '"' + s.replace(str_re, _char) + '"';
261
// Use the configured date conversion
262
var _date = Y.JSON.dateToString;
264
// Worker function. Fork behavior on data type and recurse objects and
265
// arrays per the configured depth.
266
var _stringify = function (h,key,d) {
267
var o = typeof rep === 'function' ? rep.call(h,key,h[key]) : h[key],
269
i,len,j, // array iteration
270
k,v, // object iteration
271
a; // composition array for performance over string concat
274
if (t === 'string') {
278
// native boolean and Boolean instance
279
if (t === 'boolean' || o instanceof Boolean) {
283
// native number and Number instance
284
if (t === 'number' || o instanceof Number) {
285
return isFinite(o) ? String(o) : 'null';
289
if (o instanceof Date) {
294
if (t === 'object') {
299
// Check for cyclical references
300
for (i = pstack.length - 1; i >= 0; --i) {
301
if (pstack[i] === o) {
306
// Add the object to the processing stack
307
pstack[pstack.length] = o;
311
// Only recurse if we're above depth config
315
for (i = o.length - 1; i >= 0; --i) {
316
a[i] = _stringify(o,i,d-1) || 'null';
321
// If whitelist provided, take only those keys
322
k = isA(w) ? w : Y.Object.keys(w||o);
324
for (i = 0, j = 0, len = k.length; i < len; ++i) {
325
if (typeof k[i] === 'string') {
326
v = _stringify(o,k[i],d-1);
328
a[j++] = _string(k[i]) + ':' + v;
335
// remove the array from the stack
338
return isA(o) ? '['+a.join(',')+']' : '{'+a.join(',')+'}';
341
return undefined; // invalid input
344
// Default depth to POSITIVE_INFINITY
345
d = d >= 0 ? d : 1/0;
348
return _stringify({'':o},'',d);
356
YUI.add('json', function(Y){}, '3.0.0pr1' ,{use:['json-parse', 'json-stringify']});
added
removed
loggerhead/static/javascript/yui/build/json/json.js
