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+
+
+ The source code
+
+
+
+
+ /**
+ * @class Ext.util.JSON
+ * Modified version of Douglas Crockford"s json.js that doesn"t
+ * mess with the Object prototype
+ * http://www.json.org/js.html
+ * @singleton
+ */
+Ext.util.JSON = new (function(){
+ var useHasOwn = !!{}.hasOwnProperty,
+ isNative = function() {
+ var useNative = null;
+
+ return function() {
+ if (useNative === null) {
+ useNative = Ext.USE_NATIVE_JSON && window.JSON && JSON.toString() == '[object JSON]';
+ }
+
+ return useNative;
+ };
+ }(),
+ pad = function(n) {
+ return n < 10 ? "0" + n : n;
+ },
+ doDecode = function(json){
+ return eval("(" + json + ')');
+ },
+ doEncode = function(o){
+ if(typeof o == "undefined" || o === null){
+ return "null";
+ }else if(Ext.isArray(o)){
+ return encodeArray(o);
+ }else if(Object.prototype.toString.apply(o) === '[object Date]'){
+ return Ext.util.JSON.encodeDate(o);
+ }else if(typeof o == "string"){
+ return encodeString(o);
+ }else if(typeof o == "number"){
+ return isFinite(o) ? String(o) : "null";
+ }else if(typeof o == "boolean"){
+ return String(o);
+ }else {
+ var a = ["{"], b, i, v;
+ for (i in o) {
+ if(!useHasOwn || o.hasOwnProperty(i)) {
+ v = o[i];
+ switch (typeof v) {
+ case "undefined":
+ case "function":
+ case "unknown":
+ break;
+ default:
+ if(b){
+ a.push(',');
+ }
+ a.push(doEncode(i), ":",
+ v === null ? "null" : doEncode(v));
+ b = true;
+ }
+ }
+ }
+ a.push("}");
+ return a.join("");
+ }
+ },
+ m = {
+ "\b": '\\b',
+ "\t": '\\t',
+ "\n": '\\n',
+ "\f": '\\f',
+ "\r": '\\r',
+ '"' : '\\"',
+ "\\": '\\\\'
+ },
+ encodeString = function(s){
+ if (/["\\\x00-\x1f]/.test(s)) {
+ return '"' + s.replace(/([\x00-\x1f\\"])/g, function(a, b) {
+ var c = m[b];
+ if(c){
+ return c;
+ }
+ c = b.charCodeAt();
+ return "\\u00" +
+ Math.floor(c / 16).toString(16) +
+ (c % 16).toString(16);
+ }) + '"';
+ }
+ return '"' + s + '"';
+ },
+ encodeArray = function(o){
+ var a = ["["], b, i, l = o.length, v;
+ for (i = 0; i < l; i += 1) {
+ v = o[i];
+ switch (typeof v) {
+ case "undefined":
+ case "function":
+ case "unknown":
+ break;
+ default:
+ if (b) {
+ a.push(',');
+ }
+ a.push(v === null ? "null" : Ext.util.JSON.encode(v));
+ b = true;
+ }
+ }
+ a.push("]");
+ return a.join("");
+ };
+
+ this.encodeDate = function(o){
+ return '"' + o.getFullYear() + "-" +
+ pad(o.getMonth() + 1) + "-" +
+ pad(o.getDate()) + "T" +
+ pad(o.getHours()) + ":" +
+ pad(o.getMinutes()) + ":" +
+ pad(o.getSeconds()) + '"';
+ };
+
+ /**
+ * Encodes an Object, Array or other value
+ * @param {Mixed} o The variable to encode
+ * @return {String} The JSON string
+ */
+ this.encode = function() {
+ var ec;
+ return function(o) {
+ if (!ec) {
+ // setup encoding function on first access
+ ec = isNative() ? JSON.stringify : doEncode;
+ }
+ return ec(o);
+ };
+ }();
+
+
+ /**
+ * Decodes (parses) a JSON string to an object. If the JSON is invalid, this function throws a SyntaxError unless the safe option is set.
+ * @param {String} json The JSON string
+ * @return {Object} The resulting object
+ */
+ this.decode = function() {
+ var dc;
+ return function(json) {
+ if (!dc) {
+ // setup decoding function on first access
+ dc = isNative() ? JSON.parse : doDecode;
+ }
+ return dc(json);
+ };
+ }();
+
+})();
+/**
+ * Shorthand for {@link Ext.util.JSON#encode}
+ * @param {Mixed} o The variable to encode
+ * @return {String} The JSON string
+ * @member Ext
+ * @method encode
+ */
+Ext.encode = Ext.util.JSON.encode;
+/**
+ * Shorthand for {@link Ext.util.JSON#decode}
+ * @param {String} json The JSON string
+ * @param {Boolean} safe (optional) Whether to return null or throw an exception if the JSON is invalid.
+ * @return {Object} The resulting object
+ * @member Ext
+ * @method decode
+ */
+Ext.decode = Ext.util.JSON.decode;
+
+
+
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