View synchronization

mojo/services/public/cpp/view_manager/view.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_H_
 
 #include "base/basictypes.h"
+#include "base/observer_list.h"
+#include "mojo/services/public/cpp/view_manager/view_manager_types.h"
 
 namespace mojo {
 namespace services {
 namespace view_manager {
 
+class ViewManager;
+class ViewObserver;
+class ViewTreeNode;
+
+// Views are owned by the ViewManager.
 class View {
  public:
+  static View* Create(ViewManager* manager);
+
+  void Destroy();
+
+  TransportViewId id() const { return id_; }
+  ViewTreeNode* node() { return node_; }
+
+  void AddObserver(ViewObserver* observer);
+  void RemoveObserver(ViewObserver* observer);
+
  private:
+  friend class ViewPrivate;
+
+  explicit View(ViewManager* manager);
+  View();
+  ~View();
+
+  void LocalDestroy();
+
+  TransportViewId id_;
+  ViewTreeNode* node_;
+  ViewManager* manager_;
+
+  ObserverList<ViewObserver> observers_;
+
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace view_manager
 }  // namespace services
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_H_