JSON.js

/**
 * JSON.js
 *
 * Copyright 2009, Moxiecode Systems AB
 * Released under LGPL License.
 *
 * License: http://tinymce.moxiecode.com/license
 * Contributing: http://tinymce.moxiecode.com/contributing
 */

(function() {
	function serialize(o, quote) {
		var i, v, t;

		quote = quote || '"';

		if (o == null)
			return 'null';

		t = typeof o;

		if (t == 'string') {
			v = '\bb\tt\nn\ff\rr\""\'\'\\\\';

			return quote + o.replace(/([\u0080-\uFFFF\x00-\x1f\"\'\\])/g, function(a, b) {
				// Make sure single quotes never get encoded inside double quotes for JSON compatibility
				if (quote === '"' && a === "'")
					return a;

				i = v.indexOf(b);

				if (i + 1)
					return '\\' + v.charAt(i + 1);

				a = b.charCodeAt().toString(16);

				return '\\u' + '0000'.substring(a.length) + a;
			}) + quote;
		}

		if (t == 'object') {
			if (o.hasOwnProperty && o instanceof Array) {
					for (i=0, v = '['; i<o.length; i++)
						v += (i > 0 ? ',' : '') + serialize(o[i], quote);

					return v + ']';
				}

				v = '{';

				for (i in o) {
					if (o.hasOwnProperty(i)) {
						v += typeof o[i] != 'function' ? (v.length > 1 ? ',' + quote : quote) + i + quote +':' + serialize(o[i], quote) : '';
					}
				}

				return v + '}';
		}

		return '' + o;
	};

	/**
	 * JSON parser and serializer class.
	 *
	 * @class tinymce.util.JSON
	 * @static
	 * @example
	 * // JSON parse a string into an object
	 * var obj = tinymce.util.JSON.parse(somestring);
	 * 
	 * // JSON serialize a object into an string
	 * var str = tinymce.util.JSON.serialize(obj);
	 */
	tinymce.util.JSON = {
		/**
		 * Serializes the specified object as a JSON string.
		 *
		 * @method serialize
		 * @param {Object} obj Object to serialize as a JSON string.
		 * @param {String} quote Optional quote string defaults to ".
		 * @return {string} JSON string serialized from input.
		 */
		serialize: serialize,

		/**
		 * Unserializes/parses the specified JSON string into a object.
		 *
		 * @method parse
		 * @param {string} s JSON String to parse into a JavaScript object.
		 * @return {Object} Object from input JSON string or undefined if it failed.
		 */
		parse: function(s) {
			try {
				return JSON.parse(s);
			} catch (ex) {
				// Ignore
			}
		}

		/**#@-*/
	};
})();