components/mus/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_MUS_VIEW_TREE_HOST_CONNECTION_H_
   6 #define COMPONENTS_MUS_VIEW_TREE_HOST_CONNECTION_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "components/mus/public/interfaces/view_tree_host.mojom.h"
  10 #include "components/mus/view_tree_host_delegate.h"
  11 #include "components/mus/view_tree_host_impl.h"
  12 #include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
  13
  14 namespace mus {
  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(scoped_ptr<ViewTreeHostImpl> host_impl,
  29                          ConnectionManager* connection_manager);
  30
  31   void set_view_tree(ViewTreeImpl* tree) { tree_ = tree; }
  32
  33   ViewTreeHostImpl* view_tree_host() { return host_.get(); }
  34   const ViewTreeHostImpl* view_tree_host() const { return host_.get(); }
  35
  36   ConnectionManager* connection_manager() { return connection_manager_; }
  37   const ConnectionManager* connection_manager() const {
  38     return connection_manager_;
  39   }
  40
  41   void CloseConnection();
  42
  43  protected:
  44   ~ViewTreeHostConnection() override;
  45
  46   // ViewTreeHostDelegate:
  47   void OnDisplayInitialized() override;
  48   void OnDisplayClosed() override;
  49   ViewTreeImpl* GetViewTree() override;
  50
  51  private:
  52   scoped_ptr<ViewTreeHostImpl> host_;
  53   ViewTreeImpl* tree_;
  54   ConnectionManager* connection_manager_;
  55   bool connection_closed_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(ViewTreeHostConnection);
  58 };
  59
  60 // Live implementation of ViewTreeHostConnection.
  61 class ViewTreeHostConnectionImpl : public ViewTreeHostConnection {
  62  public:
  63   ViewTreeHostConnectionImpl(mojo::InterfaceRequest<mojo::ViewTreeHost> request,
  64                              scoped_ptr<ViewTreeHostImpl> host_impl,
  65                              mojo::ViewTreeClientPtr client,
  66                              ConnectionManager* connection_manager);
  67
  68  private:
  69   ~ViewTreeHostConnectionImpl() override;
  70
  71   // ViewTreeHostDelegate:
  72   void OnDisplayInitialized() override;
  73
  74   mojo::Binding<mojo::ViewTreeHost> binding_;
  75   mojo::ViewTreeClientPtr client_;
  76
  77   DISALLOW_COPY_AND_ASSIGN(ViewTreeHostConnectionImpl);
  78 };
  79
  80 }  // namespace mus
  81
  82 #endif  // COMPONENTS_MUS_VIEW_TREE_HOST_CONNECTION_H_