X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/2e847cf21b8ab9d15fa167b315ca5b2fa92638fc..6a7e4474cba9d8be4b2ec445e10f1691f7277c50:/src/ext-core/src/util/JSON.js

diff --git a/src/ext-core/src/util/JSON.js b/src/ext-core/src/util/JSON.js
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+/*!
+ * Ext JS Library 3.2.0
+ * Copyright(c) 2006-2010 Ext JS, Inc.
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+/**
+ * @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(!Ext.isDefined(o) || o === null){
+                return "null";
+            }else if(Ext.isArray(o)){
+                return encodeArray(o);
+            }else if(Ext.isDate(o)){
+                return Ext.util.JSON.encodeDate(o);
+            }else if(Ext.isString(o)){
+                return encodeString(o);
+            }else if(typeof o == "number"){
+                //don't use isNumber here, since finite checks happen inside isNumber
+                return isFinite(o) ? String(o) : "null";
+            }else if(Ext.isBoolean(o)){
+                return String(o);
+            }else {
+                var a = ["{"], b, i, v;
+                for (i in o) {
+                    // don't encode DOM objects
+                    if(!o.getElementsByTagName){
+                        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("");
+        };
+
+    /**
+     * <p>Encodes a Date. This returns the actual string which is inserted into the JSON string as the literal expression.
+     * <b>The returned value includes enclosing double quotation marks.</b></p>
+     * <p>The default return format is "yyyy-mm-ddThh:mm:ss".</p>
+     * <p>To override this:</p><pre><code>
+Ext.util.JSON.encodeDate = function(d) {
+    return d.format('"Y-m-d"');
+};
+</code></pre>
+     * @param {Date} d The Date to encode
+     * @return {String} The string literal to use in a JSON string.
+     */
+    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;