Revert revision 33053

third_party/pkg/angular/lib/directive/ng_if.dart

 part of angular.directive;
 
 /**
  * Base class for NgIfAttrDirective and NgUnlessAttrDirective.
  */
 abstract class _NgUnlessIfAttrDirectiveBase {
   final BoundBlockFactory _boundBlockFactory;
   final BlockHole _blockHole;
   final Scope _scope;
 
   Block _block;
 
   /**
    * The new child scope.  This child scope is recreated whenever the `ng-if`
    * subtree is inserted into the DOM and destroyed when it's removed from the
    * DOM.  Refer
-   * https://github.com/angular/angular.js/wiki/The-Nuances-of-Scope-prototypical-Inheritance prototypical inheritance
+   * https://github.com/angular/angular.js/wiki/The-Nuances-of-Scope-Prototypal-Inheritance prototypal inheritance
    */
   Scope _childScope;
 
-  _NgUnlessIfAttrDirectiveBase(this._boundBlockFactory, this._blockHole,
-                               this._scope);
+  _NgUnlessIfAttrDirectiveBase(this._boundBlockFactory, this._blockHole, this._scope);
 
   // Override in subclass.
   set condition(value);
 
   void _ensureBlockExists() {
     if (_block == null) {
-      _childScope = _scope.createChild(new PrototypeMap(_scope.context));
+      _childScope = _scope.$new();
       _block = _boundBlockFactory(_childScope);
-      var insertBlock = _block;
-      _scope.rootScope.domWrite(() {
-        insertBlock.insertAfter(_blockHole);
-      });
+      _block.insertAfter(_blockHole);
     }
   }
 
   void _ensureBlockDestroyed() {
     if (_block != null) {
-      var removeBlock = _block;
-      _scope.rootScope.domWrite(() {
-        removeBlock.remove();
-      });
-      _childScope.destroy();
+      _block.remove();
+      _childScope.$destroy();
       _block = null;
       _childScope = null;
     }
   }
 }
 
 
 /**
  * The `ng-if` directive compliments the `ng-unless` (provided by
  * [NgUnlessAttrDirective]) directive.
  *
  * directive based on the **truthy/falsy** value of the provided expression.
  * Specifically, if the expression assigned to `ng-if` evaluates to a `false`
  * value, then the subtree is removed from the DOM.  Otherwise, *a clone of the
  * subtree* is reinserted into the DOM.  This clone is created from the compiled
  * state.  As such, modifications made to the element after compilation (e.g.
  * changing the `class`) are lost when the element is destroyed.
  *
  * Whenever the subtree is inserted into the DOM, it always gets a new child
  * scope.  This child scope is destroyed when the subtree is removed from the
  * DOM.  Refer
- * https://github.com/angular/angular.js/wiki/The-Nuances-of-Scope-prototypical-Inheritance prototypical inheritance
+ * https://github.com/angular/angular.js/wiki/The-Nuances-of-Scope-Prototypal-Inheritance prototypal inheritance
  *
  * This has an important implication when `ng-model` is used inside an `ng-if`
  * to bind to a javascript primitive defined in the parent scope.  In such a
  * situation, any modifications made to the variable in the `ng-if` subtree will
  * be made on the child scope and override (hide) the value in the parent scope.
  * The parent scope will remain unchanged by changes affected by this subtree.
  *
  * Note: `ng-if` differs from `ng-show` and `ng-hide` in that `ng-if` completely
  * removes and recreates the element in the DOM rather than changing its
  * visibility via the `display` css property.  A common case when this
@@ skipping 11 matching lines @@
  *          ...
  *        </div>
  *     </div>
  */
 @NgDirective(
     children: NgAnnotation.TRANSCLUDE_CHILDREN,
     selector:'[ng-if]',
     map: const {'.': '=>condition'})
 class NgIfDirective extends _NgUnlessIfAttrDirectiveBase {
   NgIfDirective(BoundBlockFactory boundBlockFactory,
-                BlockHole blockHole,
-                Scope scope): super(boundBlockFactory, blockHole, scope);
+                    BlockHole blockHole,
+                    Scope scope): super(boundBlockFactory, blockHole, scope);
 
   set condition(value) {
-    if (toBool(value)) {
-      _ensureBlockExists();
-    } else {
-      _ensureBlockDestroyed();
-    }
+      if (toBool(value))
+        _ensureBlockExists();
+      else
+        _ensureBlockDestroyed();
   }
 }
 
 
 /**
  * The `ng-unless` directive compliments the `ng-if` (provided by
  * [NgIfAttrDirective]) directive.
  *
  * The `ng-unless` directive recreates/destroys the DOM subtree containing the
  * directive based on the **falsy/truthy** value of the provided expression.
  * Specifically, if the expression assigned to `ng-unless` evaluates to a `true`
  * value, then the subtree is removed from the DOM.  Otherwise, *a clone of the
  * subtree* is reinserted into the DOM.  This clone is created from the compiled
  * state.  As such, modifications made to the element after compilation (e.g.
  * changing the `class`) are lost when the element is destroyed.
  *
  * Whenever the subtree is inserted into the DOM, it always gets a new child
  * scope.  This child scope is destroyed when the subtree is removed from the
  * DOM.  Refer
- * https://github.com/angular/angular.js/wiki/The-Nuances-of-Scope-prototypical-Inheritance prototypical inheritance
+ * https://github.com/angular/angular.js/wiki/The-Nuances-of-Scope-Prototypal-Inheritance prototypal inheritance
  *
  * This has an important implication when `ng-model` is used inside an
  * `ng-unless` to bind to a javascript primitive defined in the parent scope.
  * In such a situation, any modifications made to the variable in the
  * `ng-unless` subtree will be made on the child scope and override (hide) the
  * value in the parent scope.  The parent scope will remain unchanged by changes
  * affected by this subtree.
  *
  * Note: `ng-unless` differs from `ng-show` and `ng-hide` in that `ng-unless`
  * completely removes and recreates the element in the DOM rather than changing
@@ skipping 13 matching lines @@
  *        </div>
  *     </div>
  */
 @NgDirective(
     children: NgAnnotation.TRANSCLUDE_CHILDREN,
     selector:'[ng-unless]',
     map: const {'.': '=>condition'})
 class NgUnlessDirective extends _NgUnlessIfAttrDirectiveBase {
 
   NgUnlessDirective(BoundBlockFactory boundBlockFactory,
-                    BlockHole blockHole,
-                    Scope scope): super(boundBlockFactory, blockHole, scope);
+                        BlockHole blockHole,
+                        Scope scope): super(boundBlockFactory, blockHole, scope);
 
   set condition(value) {
-    if (!toBool(value)) {
+    if (!toBool(value))
       _ensureBlockExists();
-    } else {
+    else
       _ensureBlockDestroyed();
-    }
   }
 }