プロトタイプベースOOP試作その2.1

gistfile1.js

var Module = {};
Module.create = function(base) {
    if (!!document.attachEvent) {
        base.mix = function() {
            var parents = arguments,
                child = this;
            for (var i = 0, len = parents.length; i < len; i++) {
                var parent = parents[i];
                for (var prop in parent) if (!child.hasOwnProperty(prop)) {
                    if (isReserved(prop)) throw "reserved property";
                    child[prop] = parent[prop];
                }
            }
            return child;
        };
        
    }
    else {
        base.parent = function() { return this.__proto__; };
        base.mix = function() {
            var clone = function(o) {
                var c = {};
                for (var prop in o) if (!isReserved(prop)) {
                    c[prop] = o[prop];
                }
                c.__proto__ = o.__proto__;
                return c;
            };
            var isReserved = function(value) {
                var reservedList = ["mix", "parent"];
                for (var i = 0; i < reservedList.length; i++) {
                    if (reservedList[i] === value) {
                        return true;
                    }
                }
                return false;
            };
            
            var parents = arguments,
                child = clone(this);
                
            for (var i = 0, len = parents.length; i < len; i++) {
                var parent = {};
                var depth = 0, _c = child;
                for (var prop in parents[i]) {
                    parent[prop] = parents[i][prop];
                }
                for (;;) {
                    _c = _c.__proto__;
                    if (_c !== null) {
                        depth++;
                    }
                    else {
                        break;
                    }
                }
                var plist = ["child"];
                for (var d = 1; d <= depth; d++) {
                    plist[d] = "__proto__";
                };
                eval(plist.join(".") + " = parent");
            }
            return child;
        };
    }
    return base;
};