components/view_manager/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/view_manager/view_tree_host_connection.h"
   6
   7 #include "components/view_manager/connection_manager.h"
   8 #include "components/view_manager/view_tree_host_impl.h"
   9
  10 namespace view_manager {
  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
  21 ViewTreeHostConnection::~ViewTreeHostConnection() {
  22   // If this DCHECK fails then something has tried to delete this object without
  23   // calling CloseConnection.
  24   DCHECK(connection_closed_);
  25 }
  26
  27
  28 void ViewTreeHostConnection::CloseConnection() {
  29   // A connection error will trigger the display to close and so we want to make
  30   // sure we signal the ConnectionManager only once.
  31   if (connection_closed_)
  32     return;
  33   // We have to shut down the focus system for this host before destroying the
  34   // host, as destruction of the view tree will attempt to change focus.
  35   host_->DestroyFocusController();
  36   connection_manager()->OnHostConnectionClosed(this);
  37   connection_closed_ = true;
  38   delete this;
  39 }
  40
  41 ViewTreeImpl* ViewTreeHostConnection::GetViewTree() {
  42   return tree_;
  43 }
  44
  45 void ViewTreeHostConnection::OnDisplayInitialized() {
  46 }
  47
  48 void ViewTreeHostConnection::OnDisplayClosed() {
  49   CloseConnection();
  50 }
  51
  52 ViewTreeHostConnectionImpl::ViewTreeHostConnectionImpl(
  53     mojo::InterfaceRequest<mojo::ViewTreeHost> request,
  54     scoped_ptr<ViewTreeHostImpl> host_impl,
  55     mojo::ViewTreeClientPtr client,
  56     ConnectionManager* manager)
  57     : ViewTreeHostConnection(host_impl.Pass(), manager),
  58       binding_(view_tree_host(), request.Pass()),
  59       client_(client.Pass()) {
  60 }
  61
  62 ViewTreeHostConnectionImpl::~ViewTreeHostConnectionImpl() {
  63 }
  64
  65 void ViewTreeHostConnectionImpl::OnDisplayInitialized() {
  66   connection_manager()->AddHost(this);
  67   set_view_tree(connection_manager()->EmbedAtView(
  68       kInvalidConnectionId, view_tree_host()->root_view()->id(),
  69       client_.Pass()));
  70 }
  71
  72 }  // namespace view_manager