components/mus/view_tree_host_connection.cc

   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 #include "components/mus/view_tree_host_connection.h"
   6
   7 #include "components/mus/connection_manager.h"
   8 #include "components/mus/view_tree_host_impl.h"
   9
  10 namespace mus {
  11
  12 ViewTreeHostConnection::ViewTreeHostConnection(
  13     scoped_ptr<ViewTreeHostImpl> host_impl,
  14     ConnectionManager* manager)
  15     : host_(host_impl.Pass()),
  16       tree_(nullptr),
  17       connection_manager_(manager),
  18       connection_closed_(false) {}
  19
  20 ViewTreeHostConnection::~ViewTreeHostConnection() {
  21   // If this DCHECK fails then something has tried to delete this object without
  22   // calling CloseConnection.
  23   DCHECK(connection_closed_);
  24 }
  25
  26 void ViewTreeHostConnection::CloseConnection() {
  27   // A connection error will trigger the display to close and so we want to make
  28   // sure we signal the ConnectionManager only once.
  29   if (connection_closed_)
  30     return;
  31   // We have to shut down the focus system for this host before destroying the
  32   // host, as destruction of the view tree will attempt to change focus.
  33   host_->DestroyFocusController();
  34   connection_manager()->OnHostConnectionClosed(this);
  35   connection_closed_ = true;
  36   delete this;
  37 }
  38
  39 ViewTreeImpl* ViewTreeHostConnection::GetViewTree() {
  40   return tree_;
  41 }
  42
  43 void ViewTreeHostConnection::OnDisplayInitialized() {}
  44
  45 void ViewTreeHostConnection::OnDisplayClosed() {
  46   CloseConnection();
  47 }
  48
  49 ViewTreeHostConnectionImpl::ViewTreeHostConnectionImpl(
  50     mojo::InterfaceRequest<mojo::ViewTreeHost> request,
  51     scoped_ptr<ViewTreeHostImpl> host_impl,
  52     mojo::ViewTreeClientPtr client,
  53     ConnectionManager* manager)
  54     : ViewTreeHostConnection(host_impl.Pass(), manager),
  55       binding_(view_tree_host(), request.Pass()),
  56       client_(client.Pass()) {}
  57
  58 ViewTreeHostConnectionImpl::~ViewTreeHostConnectionImpl() {}
  59
  60 void ViewTreeHostConnectionImpl::OnDisplayInitialized() {
  61   connection_manager()->AddHost(this);
  62   set_view_tree(connection_manager()->EmbedAtView(
  63       kInvalidConnectionId, view_tree_host()->root_view()->id(),
  64       mojo::ViewTree::ACCESS_POLICY_EMBED_ROOT, client_.Pass()));
  65 }
  66
  67 }  // namespace mus