content/browser/frame_host/render_frame_proxy_host.cc

   1 // Copyright 2014 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 "content/browser/frame_host/render_frame_proxy_host.h"
   6
   7 #include "content/browser/frame_host/cross_process_frame_connector.h"
   8 #include "content/browser/frame_host/frame_tree.h"
   9 #include "content/browser/frame_host/frame_tree_node.h"
  10 #include "content/browser/frame_host/render_frame_host_impl.h"
  11 #include "content/browser/frame_host/render_widget_host_view_child_frame.h"
  12 #include "content/browser/renderer_host/render_view_host_impl.h"
  13 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  14 #include "content/browser/site_instance_impl.h"
  15 #include "content/common/frame_messages.h"
  16 #include "ipc/ipc_message.h"
  17
  18 namespace content {
  19
  20 RenderFrameProxyHost::RenderFrameProxyHost(SiteInstance* site_instance,
  21                                            FrameTreeNode* frame_tree_node)
  22     : routing_id_(site_instance->GetProcess()->GetNextRoutingID()),
  23       site_instance_(site_instance),
  24       frame_tree_node_(frame_tree_node) {
  25   GetProcess()->AddRoute(routing_id_, this);
  26
  27   if (!frame_tree_node_->IsMainFrame() &&
  28       frame_tree_node_->parent()
  29               ->render_manager()
  30               ->current_frame_host()
  31               ->GetSiteInstance() == site_instance) {
  32     // The RenderFrameHost navigating cross-process is destroyed and a proxy for
  33     // it is created in the parent's process. CrossProcessFrameConnector
  34     // initialization only needs to happen on an initial cross-process
  35     // navigation, when the RenderFrameHost leaves the same process as its
  36     // parent. The same CrossProcessFrameConnector is used for subsequent cross-
  37     // process navigations, but it will be destroyed if the frame is
  38     // navigated back to the same SiteInstance as its parent.
  39     cross_process_frame_connector_.reset(new CrossProcessFrameConnector(this));
  40   }
  41 }
  42
  43 RenderFrameProxyHost::~RenderFrameProxyHost() {
  44   if (GetProcess()->HasConnection())
  45     Send(new FrameMsg_DeleteProxy(routing_id_));
  46
  47   GetProcess()->RemoveRoute(routing_id_);
  48 }
  49
  50 void RenderFrameProxyHost::SetChildRWHView(RenderWidgetHostView* view) {
  51   cross_process_frame_connector_->set_view(
  52       static_cast<RenderWidgetHostViewChildFrame*>(view));
  53 }
  54
  55 RenderViewHostImpl* RenderFrameProxyHost::GetRenderViewHost() {
  56   return frame_tree_node_->frame_tree()->GetRenderViewHost(
  57       site_instance_.get());
  58 }
  59
  60 scoped_ptr<RenderFrameHostImpl> RenderFrameProxyHost::PassFrameHostOwnership() {
  61   render_frame_host_->set_render_frame_proxy_host(NULL);
  62   return render_frame_host_.Pass();
  63 }
  64
  65 bool RenderFrameProxyHost::Send(IPC::Message *msg) {
  66   // TODO(nasko): For now, RenderFrameHost uses this object to send IPC messages
  67   // while swapped out. This can be removed once we don't have a swapped out
  68   // state on RenderFrameHosts. See https://crbug.com/357747.
  69   msg->set_routing_id(routing_id_);
  70   return GetProcess()->Send(msg);
  71 }
  72
  73 bool RenderFrameProxyHost::OnMessageReceived(const IPC::Message& msg) {
  74   if (cross_process_frame_connector_.get() &&
  75       cross_process_frame_connector_->OnMessageReceived(msg))
  76     return true;
  77
  78   // TODO(nasko): This can be removed once we don't have a swapped out state on
  79   // RenderFrameHosts. See https://crbug.com/357747.
  80   if (render_frame_host_.get())
  81     return render_frame_host_->OnMessageReceived(msg);
  82
  83   return false;
  84 }
  85
  86 bool RenderFrameProxyHost::InitRenderFrameProxy() {
  87   // The process may (if we're sharing a process with another host that already
  88   // initialized it) or may not (we have our own process or the old process
  89   // crashed) have been initialized. Calling Init multiple times will be
  90   // ignored, so this is safe.
  91   if (!site_instance_->GetProcess()->Init())
  92     return false;
  93
  94   DCHECK(GetProcess()->HasConnection());
  95
  96   int parent_routing_id = MSG_ROUTING_NONE;
  97   if (frame_tree_node_->parent()) {
  98     parent_routing_id = frame_tree_node_->parent()
  99                             ->render_manager()
 100                             ->GetRoutingIdForSiteInstance(site_instance_.get());
 101     CHECK_NE(parent_routing_id, MSG_ROUTING_NONE);
 102   }
 103
 104   Send(new FrameMsg_NewFrameProxy(routing_id_,
 105                                   parent_routing_id,
 106                                   frame_tree_node_->frame_tree()
 107                                       ->GetRenderViewHost(site_instance_.get())
 108                                       ->GetRoutingID()));
 109
 110   return true;
 111 }
 112
 113 void RenderFrameProxyHost::DisownOpener() {
 114   Send(new FrameMsg_DisownOpener(GetRoutingID()));
 115 }
 116
 117
 118 }  // namespace content