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 "base/lazy_instance.h"
   8 #include "content/browser/frame_host/cross_process_frame_connector.h"
   9 #include "content/browser/frame_host/frame_tree.h"
  10 #include "content/browser/frame_host/frame_tree_node.h"
  11 #include "content/browser/frame_host/render_frame_host_impl.h"
  12 #include "content/browser/frame_host/render_widget_host_view_child_frame.h"
  13 #include "content/browser/renderer_host/render_view_host_impl.h"
  14 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  15 #include "content/browser/site_instance_impl.h"
  16 #include "content/common/frame_messages.h"
  17 #include "content/public/browser/browser_thread.h"
  18 #include "ipc/ipc_message.h"
  19
  20 namespace content {
  21
  22 namespace {
  23
  24 // The (process id, routing id) pair that identifies one RenderFrameProxy.
  25 typedef std::pair<int32, int32> RenderFrameProxyHostID;
  26 typedef base::hash_map<RenderFrameProxyHostID, RenderFrameProxyHost*>
  27     RoutingIDFrameProxyMap;
  28 base::LazyInstance<RoutingIDFrameProxyMap> g_routing_id_frame_proxy_map =
  29   LAZY_INSTANCE_INITIALIZER;
  30
  31 }
  32
  33 // static
  34 RenderFrameProxyHost* RenderFrameProxyHost::FromID(int process_id,
  35                                                    int routing_id) {
  36   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  37   RoutingIDFrameProxyMap* frames = g_routing_id_frame_proxy_map.Pointer();
  38   RoutingIDFrameProxyMap::iterator it = frames->find(
  39       RenderFrameProxyHostID(process_id, routing_id));
  40   return it == frames->end() ? NULL : it->second;
  41 }
  42
  43 RenderFrameProxyHost::RenderFrameProxyHost(SiteInstance* site_instance,
  44                                            FrameTreeNode* frame_tree_node)
  45     : routing_id_(site_instance->GetProcess()->GetNextRoutingID()),
  46       site_instance_(site_instance),
  47       process_(site_instance->GetProcess()),
  48       frame_tree_node_(frame_tree_node),
  49       render_frame_proxy_created_(false) {
  50   GetProcess()->AddRoute(routing_id_, this);
  51   CHECK(g_routing_id_frame_proxy_map.Get().insert(
  52       std::make_pair(
  53           RenderFrameProxyHostID(GetProcess()->GetID(), routing_id_),
  54           this)).second);
  55
  56   if (!frame_tree_node_->IsMainFrame() &&
  57       frame_tree_node_->parent()
  58               ->render_manager()
  59               ->current_frame_host()
  60               ->GetSiteInstance() == site_instance) {
  61     // The RenderFrameHost navigating cross-process is destroyed and a proxy for
  62     // it is created in the parent's process. CrossProcessFrameConnector
  63     // initialization only needs to happen on an initial cross-process
  64     // navigation, when the RenderFrameHost leaves the same process as its
  65     // parent. The same CrossProcessFrameConnector is used for subsequent cross-
  66     // process navigations, but it will be destroyed if the frame is
  67     // navigated back to the same SiteInstance as its parent.
  68     cross_process_frame_connector_.reset(new CrossProcessFrameConnector(this));
  69   }
  70 }
  71
  72 RenderFrameProxyHost::~RenderFrameProxyHost() {
  73   if (GetProcess()->HasConnection()) {
  74     // TODO(nasko): For now, don't send this IPC for top-level frames, as
  75     // the top-level RenderFrame will delete the RenderFrameProxy.
  76     // This can be removed once we don't have a swapped out state on
  77     // RenderFrame. See https://crbug.com/357747
  78     if (!frame_tree_node_->IsMainFrame())
  79       Send(new FrameMsg_DeleteProxy(routing_id_));
  80   }
  81
  82   GetProcess()->RemoveRoute(routing_id_);
  83   g_routing_id_frame_proxy_map.Get().erase(
  84       RenderFrameProxyHostID(GetProcess()->GetID(), routing_id_));
  85 }
  86
  87 void RenderFrameProxyHost::SetChildRWHView(RenderWidgetHostView* view) {
  88   cross_process_frame_connector_->set_view(
  89       static_cast<RenderWidgetHostViewChildFrame*>(view));
  90 }
  91
  92 RenderViewHostImpl* RenderFrameProxyHost::GetRenderViewHost() {
  93   return frame_tree_node_->frame_tree()->GetRenderViewHost(
  94       site_instance_.get());
  95 }
  96
  97 void RenderFrameProxyHost::TakeFrameHostOwnership(
  98     scoped_ptr<RenderFrameHostImpl> render_frame_host) {
  99   render_frame_host_ = render_frame_host.Pass();
 100   render_frame_host_->set_render_frame_proxy_host(this);
 101 }
 102
 103 scoped_ptr<RenderFrameHostImpl> RenderFrameProxyHost::PassFrameHostOwnership() {
 104   render_frame_host_->set_render_frame_proxy_host(NULL);
 105   return render_frame_host_.Pass();
 106 }
 107
 108 bool RenderFrameProxyHost::Send(IPC::Message *msg) {
 109   return GetProcess()->Send(msg);
 110 }
 111
 112 bool RenderFrameProxyHost::OnMessageReceived(const IPC::Message& msg) {
 113   if (cross_process_frame_connector_.get() &&
 114       cross_process_frame_connector_->OnMessageReceived(msg))
 115     return true;
 116
 117   bool handled = true;
 118   IPC_BEGIN_MESSAGE_MAP(RenderFrameProxyHost, msg)
 119     IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
 120     IPC_MESSAGE_UNHANDLED(handled = false)
 121   IPC_END_MESSAGE_MAP()
 122   return handled;
 123 }
 124
 125 bool RenderFrameProxyHost::InitRenderFrameProxy() {
 126   DCHECK(!render_frame_proxy_created_);
 127   // The process may (if we're sharing a process with another host that already
 128   // initialized it) or may not (we have our own process or the old process
 129   // crashed) have been initialized. Calling Init multiple times will be
 130   // ignored, so this is safe.
 131   if (!GetProcess()->Init())
 132     return false;
 133
 134   DCHECK(GetProcess()->HasConnection());
 135
 136   int parent_routing_id = MSG_ROUTING_NONE;
 137   if (frame_tree_node_->parent()) {
 138     parent_routing_id = frame_tree_node_->parent()
 139                             ->render_manager()
 140                             ->GetRoutingIdForSiteInstance(site_instance_.get());
 141     CHECK_NE(parent_routing_id, MSG_ROUTING_NONE);
 142   }
 143
 144   Send(new FrameMsg_NewFrameProxy(routing_id_,
 145                                   parent_routing_id,
 146                                   frame_tree_node_->frame_tree()
 147                                       ->GetRenderViewHost(site_instance_.get())
 148                                       ->GetRoutingID(),
 149                                   frame_tree_node_
 150                                       ->current_replication_state()));
 151
 152   render_frame_proxy_created_ = true;
 153   return true;
 154 }
 155
 156 void RenderFrameProxyHost::DisownOpener() {
 157   Send(new FrameMsg_DisownOpener(GetRoutingID()));
 158 }
 159
 160 void RenderFrameProxyHost::OnOpenURL(
 161     const FrameHostMsg_OpenURL_Params& params) {
 162   frame_tree_node_->current_frame_host()->OpenURL(params, site_instance_.get());
 163 }
 164
 165 }  // namespace content