Add support for mapping node tree on the client.

mojo/services/public/cpp/view_manager/lib/view_manager_synchronizer.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_LIB_VIEW_MANAGER_SYNCHRONIZER_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_LIB_VIEW_MANAGER_SYNCHRONIZER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_vector.h"
 #include "mojo/public/cpp/bindings/remote_ptr.h"
+#include "mojo/services/public/cpp/view_manager/view_manager_types.h"
 #include "mojo/services/public/interfaces/view_manager/view_manager.mojom.h"
 
 namespace mojo {
 namespace services {
 namespace view_manager {
 
 class ViewManager;
 class ViewManagerTransaction;
 
 // Manages the connection with the View Manager service.
 class ViewManagerSynchronizer : public IViewManagerClient {
  public:
   explicit ViewManagerSynchronizer(ViewManager* view_manager);
   virtual ~ViewManagerSynchronizer();
 
+  bool connected() const { return connected_; }
+
   // API exposed to the node implementation that pushes local changes to the
   // service.
   uint16_t CreateViewTreeNode();
-  void AddChild(uint16_t child_id, uint16_t parent_id);
-  void RemoveChild(uint16_t child_id, uint16_t parent_id);
+  void DestroyViewTreeNode(TransportNodeId node_id);
+
+  // These methods take TransportIds. For views owned by the current connection,
+  // the connection id high word can be zero. In all cases, the TransportId 0x1
+  // refers to the root node.
+  void AddChild(TransportNodeId child_id, TransportNodeId parent_id);
+  void RemoveChild(TransportNodeId child_id, TransportNodeId parent_id);
+
+  void BuildNodeTree(const Callback<void()>& callback);
 
  private:
   friend class ViewManagerTransaction;
   typedef ScopedVector<ViewManagerTransaction> Transactions;
 
   // Overridden from IViewManagerClient:
   virtual void OnConnectionEstablished(uint16 connection_id) OVERRIDE;
   virtual void OnNodeHierarchyChanged(uint32 node,
                                       uint32 new_parent,
                                       uint32 old_parent,
@@ skipping 10 matching lines @@
   // Sync the client model with the service by enumerating the pending
   // transaction queue and applying them in order.
   void DoSync();
 
   // Used by individual transactions to generate a connection-specific change
   // id.
   // TODO(beng): What happens when there are more than sizeof(int) changes in
   //             the queue?
   uint32_t GetNextChangeId();
 
+  // Called from transactions to notify when a commit is made to the service and
+  // when a response is received.
+  void NotifyCommit();
+  void NotifyCommitResponse(bool success);
+
   // Removes |transaction| from the pending queue. |transaction| must be at the
   // front of the queue.
   void RemoveFromPendingQueue(ViewManagerTransaction* transaction);
 
+  void OnTreeReceived(const Callback<void()>& callback,
+                      const Array<INode>& data);
+
   ViewManager* view_manager_;
   bool connected_;
   uint16_t connection_id_;
   uint16_t next_id_;
   uint32_t next_change_id_;
 
   Transactions pending_transactions_;
 
   RemotePtr<IViewManager> service_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewManagerSynchronizer);
 };
 
 }  // namespace view_manager
 }  // namespace services
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_LIB_VIEW_MANAGER_SYNCHRONIZER_H_