133 lines
4.1 KiB
JavaScript
133 lines
4.1 KiB
JavaScript
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/**
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* @class YAHOO.ext.util.JSON
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* Modified version of Douglas Crockford's json.js that doesn't
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* mess with the Object prototype
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* http://www.json.org/js.html
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* @singleton
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*/
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YAHOO.ext.util.JSON = new function(){
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var useHasOwn = {}.hasOwnProperty ? true : false;
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// crashes Safari in some instances
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//var validRE = /^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/;
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var pad = function(n) {
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return n < 10 ? '0' + n : n;
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};
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var m = {
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'\b': '\\b',
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'\t': '\\t',
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'\n': '\\n',
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'\f': '\\f',
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'\r': '\\r',
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'"' : '\\"',
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'\\': '\\\\'
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};
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var encodeString = function(s){
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if (/["\\\x00-\x1f]/.test(s)) {
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return '"' + s.replace(/([\x00-\x1f\\"])/g, function(a, b) {
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var c = m[b];
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if(c){
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return c;
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}
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c = b.charCodeAt();
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return '\\u00' +
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Math.floor(c / 16).toString(16) +
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(c % 16).toString(16);
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}) + '"';
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}
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return '"' + s + '"';
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};
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var encodeArray = function(o){
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var a = ['['], b, i, l = o.length, v;
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for (i = 0; i < l; i += 1) {
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v = o[i];
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switch (typeof v) {
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case 'undefined':
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case 'function':
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case 'unknown':
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break;
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default:
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if (b) {
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a.push(',');
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}
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a.push(v === null ? "null" : YAHOO.ext.util.JSON.encode(v));
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b = true;
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}
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}
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a.push(']');
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return a.join('');
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};
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var encodeDate = function(o){
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return '"' + o.getFullYear() + '-' +
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pad(o.getMonth() + 1) + '-' +
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pad(o.getDate()) + 'T' +
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pad(o.getHours()) + ':' +
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pad(o.getMinutes()) + ':' +
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pad(o.getSeconds()) + '"';
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};
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/**
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* Encodes an Object, Array or other value
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* @param {Mixed} o The variable to encode
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* @return {String} The JSON string
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*/
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this.encode = function(o){
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if(typeof o == 'undefined' || o === null){
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return 'null';
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}else if(o instanceof Array){
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return encodeArray(o);
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}else if(o instanceof Date){
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return encodeDate(o);
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}else if(typeof o == 'string'){
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return encodeString(o);
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}else if(typeof o == 'number'){
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return isFinite(o) ? String(o) : "null";
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}else if(typeof o == 'boolean'){
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return String(o);
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}else {
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var a = ['{'], b, i, v;
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for (var i in o) {
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if(!useHasOwn || o.hasOwnProperty(i)) {
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v = o[i];
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switch (typeof v) {
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case 'undefined':
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case 'function':
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case 'unknown':
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break;
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default:
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if(b){
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a.push(',');
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}
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a.push(this.encode(i), ':',
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v === null ? "null" : this.encode(v));
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b = true;
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}
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}
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}
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a.push('}');
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return a.join('');
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}
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};
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/**
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* Decodes (parses) a JSON string to an object. If the JSON is invalid, this function throws a SyntaxError.
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* @param {String} json The JSON string
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* @return {Object} The resulting object
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*/
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this.decode = function(json){
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// although crockford had a good idea, this line crashes safari in some instances
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//try{
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//if(validRE.test(json)) {
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return eval('(' + json + ')');
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// }
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// }catch(e){
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// }
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// throw new SyntaxError("parseJSON");
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};
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}();
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