components/view_manager/view_tree_host_connection.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_VIEW_MANAGER_VIEW_TREE_HOST_CONNECTION_H_
   6 #define COMPONENTS_VIEW_MANAGER_VIEW_TREE_HOST_CONNECTION_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "components/view_manager/public/interfaces/view_tree_host.mojom.h"
  10 #include "components/view_manager/view_tree_host_delegate.h"
  11 #include "components/view_manager/view_tree_host_impl.h"
  12 #include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
  13
  14 namespace view_manager {
  15
  16 class ConnectionManager;
  17 class ViewTreeImpl;
  18
  19 // ViewTreeHostConnection is a server-side object that encapsulates the
  20 // connection between a client of the ViewTreeHost and its implementation.
  21 // ViewTreeHostConnection also establishes a ClientConnection via the same
  22 // code path as embedded views. ConnectionManager manages the lifetime of
  23 // ViewTreeHostConnections. If a connection to the client is lost or if the
  24 // associated root is closed, the ViewTreeHostConnection will inform the
  25 // ConnectionManager to destroy the root and its associated view tree.
  26 class ViewTreeHostConnection : public ViewTreeHostDelegate {
  27  public:
  28   ViewTreeHostConnection(
  29       scoped_ptr<ViewTreeHostImpl> host_impl,
  30       ConnectionManager* connection_manager);
  31
  32   void set_view_tree(ViewTreeImpl* tree) {
  33     tree_ = tree;
  34   }
  35
  36   ViewTreeHostImpl* view_tree_host() { return host_.get();}
  37   const ViewTreeHostImpl* view_tree_host() const { return host_.get(); }
  38
  39   ConnectionManager* connection_manager() { return connection_manager_; }
  40   const ConnectionManager* connection_manager() const {
  41     return connection_manager_;
  42   }
  43
  44   void CloseConnection();
  45
  46  protected:
  47   ~ViewTreeHostConnection() override;
  48
  49   // ViewTreeHostDelegate:
  50   void OnDisplayInitialized() override;
  51   void OnDisplayClosed() override;
  52   ViewTreeImpl* GetViewTree() override;
  53
  54  private:
  55   scoped_ptr<ViewTreeHostImpl> host_;
  56   ViewTreeImpl* tree_;
  57   ConnectionManager* connection_manager_;
  58   bool connection_closed_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(ViewTreeHostConnection);
  61 };
  62
  63 // Live implementation of ViewTreeHostConnection.
  64 class ViewTreeHostConnectionImpl : public ViewTreeHostConnection {
  65  public:
  66    ViewTreeHostConnectionImpl(
  67       mojo::InterfaceRequest<mojo::ViewTreeHost> request,
  68       scoped_ptr<ViewTreeHostImpl> host_impl,
  69       mojo::ViewTreeClientPtr client,
  70       ConnectionManager* connection_manager);
  71
  72  private:
  73    ~ViewTreeHostConnectionImpl() override;
  74
  75   // ViewTreeHostDelegate:
  76   void OnDisplayInitialized() override;
  77
  78   mojo::Binding<mojo::ViewTreeHost> binding_;
  79   mojo::ViewTreeClientPtr client_;
  80
  81   DISALLOW_COPY_AND_ASSIGN(ViewTreeHostConnectionImpl);
  82 };
  83
  84 }  // namespace view_manager
  85
  86 #endif  // COMPONENTS_VIEW_MANAGER_VIEW_TREE_HOST_CONNECTION_H_