added ng-controller directive

src/Scope.js

@@ -1,4 +1,4 @@
-function getter(instance, path) {
+function getter(instance, path, unboundFn) {
   if (!path) return instance;
   var element = path.split('.');
   var key;
@@ -22,7 +22,7 @@ function getter(instance, path) {
       }
     }
   }
-  if (typeof instance === 'function' && !instance['$$factory']) {
+  if (!unboundFn && isFunction(instance) && !instance['$$factory']) {
     return bind(lastInstance, instance);
   }
   return instance;
@@ -146,7 +146,17 @@ function createScope(parent, services, existing) {
         fn: expressionCompile(expr),
         handler: exceptionHandler
       });
+    },
+
+    $become: function(Class) {
+      // remove existing
+      foreach(behavior, function(value, key){ delete behavior[key]; });
+      foreach((Class || noop).prototype, function(fn, name){
+        behavior[name] = bind(instance, fn);
+      });
+      (Class || noop).call(instance);
     }
+
   });
 
   if (!parent.$root) {

src/directives.js

@@ -4,6 +4,17 @@ angularDirective("ng-init", function(expression){
   };
 });
 
+angularDirective("ng-controller", function(expression){
+  return function(element){
+    var controller = getter(window, expression, true) || getter(this, expression, true);
+    if (!controller)
+      throw "Can not find '"+expression+"' controller.";
+    if (!isFunction(controller))
+      throw "Reference '"+expression+"' is not a class.";
+    this.$become(controller);
+  };
+});
+
 angularDirective("ng-eval", function(expression){
   return function(element){
     this.$onEval(expression, element);

src/jqLite.js

@@ -115,7 +115,8 @@ JQLite.prototype = {
 
   remove: function() {
     this.dealoc();
-    this[0].parentNode.removeChild(this[0]);
+    var parentNode = this[0].parentNode;
+    if (parentNode) parentNode.removeChild(this[0]);
   },
 
   removeAttr: function(name) {

test/directivesSpec.js

@@ -156,4 +156,19 @@ describe("directives", function(){
     scope.$eval();
     expect(element.css('display')).toEqual('');
   });
+
+  it('should ng-controller', function(){
+    window.Greeter = function(){
+      this.greeting = 'hello';
+    };
+    window.Greeter.prototype = {
+      greet: function(name) {
+        return this.greeting + ' ' + name;
+      }
+    };
+    var scope = compile('<div ng-controller="Greeter"></div>');
+    expect(scope.greeting).toEqual('hello');
+    expect(scope.greet('misko')).toEqual('hello misko');
+    delete window.Greeter;
+  });
 });