review.tizen.org Git - platform/framework/web/crosswalk-tizen.git/blob

   1 'use strict';
   2
   3 var isPlainObject = require('./is-plain-object')
   4   , value         = require('./valid-value')
   5
   6   , keys = Object.keys
   7   , copy;
   8
   9 copy = function (source) {
  10         var target = {};
  11         this[0].push(source);
  12         this[1].push(target);
  13         keys(source).forEach(function (key) {
  14                 var index;
  15                 if (!isPlainObject(source[key])) {
  16                         target[key] = source[key];
  17                         return;
  18                 }
  19                 index = this[0].indexOf(source[key]);
  20                 if (index === -1) target[key] = copy.call(this, source[key]);
  21                 else target[key] = this[1][index];
  22         }, this);
  23         return target;
  24 };
  25
  26 module.exports = function (source) {
  27         var obj = Object(value(source));
  28         if (obj !== source) return obj;
  29         return copy.call([[], []], obj);
  30 };