Fix clone function to support custom Shapes. close #71

CHANGELOG.md

@@ -16,6 +16,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - context wrapper is more capable with native context.
   So you can use `context.fillStyle` property in your `sceneFunc` without accessing native context.
 - `toDataURL` now handle pixelRatio. So image for stage 400x400 for retina will be 800x800.
+- Correct `clone()` for custom nodes
   
 
 ## [0.9.0][2015-02-27]

src/Node.js

@@ -1340,7 +1340,7 @@
                 attrs[key] = obj[key];
             }
 
-            var node = new Konva[className](attrs);
+            var node = new this.constructor(attrs);
             // copy over listeners
             for(key in this.eventListeners) {
                 allListeners = this.eventListeners[key];

src/Util.js

@@ -835,18 +835,20 @@
             }
         },
         extend: function(child, parent) {
-                function Ctor() {
-                    this.constructor = child;
-                }
+            function Ctor() {
+                this.constructor = child;
+            }
             Ctor.prototype = parent.prototype;
-                var old_proto = child.prototype;
-                child.prototype = new Ctor();
-                for (var key in old_proto) {
-                    if (old_proto.hasOwnProperty(key)) {
-                        child.prototype[key] = old_proto[key];
-                    }
+            var old_proto = child.prototype;
+            child.prototype = new Ctor();
+            for (var key in old_proto) {
+                if (old_proto.hasOwnProperty(key)) {
+                    child.prototype[key] = old_proto[key];
                 }
-                child.__super__ = parent.prototype;
+            }
+            child.__super__ = parent.prototype;
+            // create reference to parent
+            child.super = parent;
         },
         /**
          * adds methods to a constructor prototype

test/unit/Shape-test.js

@@ -1178,4 +1178,28 @@ suite('Shape', function() {
     });
 
 
+    test('clone custom shape', function() {
+        var className = 'myCustomName'
+        var CustomShape = function() {
+            CustomShape.super.apply(this, arguments);
+            this.className = className;
+        }
+
+        CustomShape.prototype.foo = function() {};
+
+        Konva.Util.extend(CustomShape, Konva.Shape);
+
+        var myShape = new CustomShape({
+            fill : 'grey'
+        });
+
+        var clone = myShape.clone();
+        assert.equal(clone instanceof CustomShape, true);
+        assert.equal(clone instanceof Konva.Shape, true);
+        assert.equal(clone.className, className);
+        assert.equal(clone.fill(), 'grey');
+        assert.equal(clone.foo, CustomShape.prototype.foo);
+    });
+
+
 });