initial commit

libjs/utils/class.js

@@ -0,0 +1,52 @@
+"use strict";
+
+var Class = function() {};
+        
+Class.inherit = function(proto) {
+    var superClass = this;
+    var Base = function() {};
+    var subclass = proto && (proto.constructor !== Object) ? proto.constructor : function() {
+        superClass.apply(this, arguments)
+    };
+    
+    Base.prototype = this.prototype;
+    var fn = new Base();
+    
+    for (var key in proto) {
+        if (proto.hasOwnProperty(key)) {
+            fn[key] = proto[key];
+        }
+    }
+    for (var method in this) {
+        if (this.hasOwnProperty(method)) {
+            subclass[method] = this[method];
+        }
+    }
+    
+    fn.constructor = subclass;
+    subclass.prototype = subclass.fn = fn;
+    
+    return subclass;
+}
+
+module.exports = Class.inherit({
+    className: "Class",
+    constructor: function() {
+        if (!(this instanceof Class)) {
+            throw new SyntaxError("You didn't call \"new\" operator");
+        }
+        
+        Class.call(this);
+        this._uncyclic = [];
+    },
+    destructor: function() {
+        for (var i = 0; i < this._uncyclic.length; ++i) {
+            this._uncyclic[i].call(this);
+        }
+
+        for (var key in this) {
+            this[key] = undefined;
+            delete this[key];
+        }
+    }
+});