Deletion/ownership

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 "base/memory/weak_ptr.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 base {
 class RunLoop;
 }
 
 namespace mojo {
 namespace services {
@@ skipping 14 matching lines @@
   // service.
   TransportNodeId CreateViewTreeNode();
   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);
 
+  bool OwnsNode(TransportNodeId id) const;
+
  private:
   friend class ViewManagerTransaction;
   typedef ScopedVector<ViewManagerTransaction> Transactions;
 
   // Overridden from IViewManagerClient:
   virtual void OnConnectionEstablished(uint16 connection_id) OVERRIDE;
   virtual void OnNodeHierarchyChanged(uint32 node_id,
                                       uint32 new_parent_id,
                                       uint32 old_parent_id,
                                       uint32 change_id) OVERRIDE;
   virtual void OnNodeViewReplaced(uint32_t node,
                                   uint32_t new_view_id,
                                   uint32_t old_view_id,
                                   uint32_t change_id) OVERRIDE;
+  virtual void OnNodeDeleted(uint32_t node_id, uint32_t change_id) OVERRIDE;
 
   // Called to schedule a sync of the client model with the service after a
   // return to the message loop.
   void ScheduleSync();
 
   // 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();
 
   // Removes |transaction| from the pending queue. |transaction| must be at the
   // front of the queue.
   void RemoveFromPendingQueue(ViewManagerTransaction* transaction);
 
   void OnRootTreeReceived(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_;
 
+  base::WeakPtrFactory<ViewManagerSynchronizer> sync_factory_;
+
   // Non-NULL while blocking on the connection to |service_| during
   // construction.
   base::RunLoop* init_loop_;
 
   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_