| |
| module.exports = ProtoList |
| |
| function setProto(obj, proto) { |
| if (typeof Object.setPrototypeOf === "function") |
| return Object.setPrototypeOf(obj, proto) |
| else |
| obj.__proto__ = proto |
| } |
| |
| function ProtoList () { |
| this.list = [] |
| var root = null |
| Object.defineProperty(this, 'root', { |
| get: function () { return root }, |
| set: function (r) { |
| root = r |
| if (this.list.length) { |
| setProto(this.list[this.list.length - 1], r) |
| } |
| }, |
| enumerable: true, |
| configurable: true |
| }) |
| } |
| |
| ProtoList.prototype = |
| { get length () { return this.list.length } |
| , get keys () { |
| var k = [] |
| for (var i in this.list[0]) k.push(i) |
| return k |
| } |
| , get snapshot () { |
| var o = {} |
| this.keys.forEach(function (k) { o[k] = this.get(k) }, this) |
| return o |
| } |
| , get store () { |
| return this.list[0] |
| } |
| , push : function (obj) { |
| if (typeof obj !== "object") obj = {valueOf:obj} |
| if (this.list.length >= 1) { |
| setProto(this.list[this.list.length - 1], obj) |
| } |
| setProto(obj, this.root) |
| return this.list.push(obj) |
| } |
| , pop : function () { |
| if (this.list.length >= 2) { |
| setProto(this.list[this.list.length - 2], this.root) |
| } |
| return this.list.pop() |
| } |
| , unshift : function (obj) { |
| setProto(obj, this.list[0] || this.root) |
| return this.list.unshift(obj) |
| } |
| , shift : function () { |
| if (this.list.length === 1) { |
| setProto(this.list[0], this.root) |
| } |
| return this.list.shift() |
| } |
| , get : function (key) { |
| return this.list[0][key] |
| } |
| , set : function (key, val, save) { |
| if (!this.length) this.push({}) |
| if (save && this.list[0].hasOwnProperty(key)) this.push({}) |
| return this.list[0][key] = val |
| } |
| , forEach : function (fn, thisp) { |
| for (var key in this.list[0]) fn.call(thisp, key, this.list[0][key]) |
| } |
| , slice : function () { |
| return this.list.slice.apply(this.list, arguments) |
| } |
| , splice : function () { |
| // handle injections |
| var ret = this.list.splice.apply(this.list, arguments) |
| for (var i = 0, l = this.list.length; i < l; i++) { |
| setProto(this.list[i], this.list[i + 1] || this.root) |
| } |
| return ret |
| } |
| } |
