src/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(BrowserThread::CurrentlyOn(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       frame_tree_node_(frame_tree_node) {
  48   GetProcess()->AddRoute(routing_id_, this);
  49   CHECK(g_routing_id_frame_proxy_map.Get().insert(
  50       std::make_pair(
  51           RenderFrameProxyHostID(GetProcess()->GetID(), routing_id_),
  52           this)).second);
  53
  54   if (!frame_tree_node_->IsMainFrame() &&
  55       frame_tree_node_->parent()
  56               ->render_manager()
  57               ->current_frame_host()
  58               ->GetSiteInstance() == site_instance) {
  59     // The RenderFrameHost navigating cross-process is destroyed and a proxy for
  60     // it is created in the parent's process. CrossProcessFrameConnector
  61     // initialization only needs to happen on an initial cross-process
  62     // navigation, when the RenderFrameHost leaves the same process as its
  63     // parent. The same CrossProcessFrameConnector is used for subsequent cross-
  64     // process navigations, but it will be destroyed if the frame is
  65     // navigated back to the same SiteInstance as its parent.
  66     cross_process_frame_connector_.reset(new CrossProcessFrameConnector(this));
  67   }
  68 }
  69
  70 RenderFrameProxyHost::~RenderFrameProxyHost() {
  71   if (GetProcess()->HasConnection()) {
  72     // TODO(nasko): For now, don't send this IPC for top-level frames, as
  73     // the top-level RenderFrame will delete the RenderFrameProxy.
  74     // This can be removed once we don't have a swapped out state on
  75     // RenderFrame. See https://crbug.com/357747
  76     if (!frame_tree_node_->IsMainFrame())
  77       Send(new FrameMsg_DeleteProxy(routing_id_));
  78   }
  79
  80   GetProcess()->RemoveRoute(routing_id_);
  81   g_routing_id_frame_proxy_map.Get().erase(
  82       RenderFrameProxyHostID(GetProcess()->GetID(), routing_id_));
  83 }
  84
  85 void RenderFrameProxyHost::SetChildRWHView(RenderWidgetHostView* view) {
  86   cross_process_frame_connector_->set_view(
  87       static_cast<RenderWidgetHostViewChildFrame*>(view));
  88 }
  89
  90 RenderViewHostImpl* RenderFrameProxyHost::GetRenderViewHost() {
  91   return frame_tree_node_->frame_tree()->GetRenderViewHost(
  92       site_instance_.get());
  93 }
  94
  95 void RenderFrameProxyHost::TakeFrameHostOwnership(
  96     scoped_ptr<RenderFrameHostImpl> render_frame_host) {
  97   render_frame_host_ = render_frame_host.Pass();
  98   render_frame_host_->set_render_frame_proxy_host(this);
  99 }
 100
 101 scoped_ptr<RenderFrameHostImpl> RenderFrameProxyHost::PassFrameHostOwnership() {
 102   render_frame_host_->set_render_frame_proxy_host(NULL);
 103   return render_frame_host_.Pass();
 104 }
 105
 106 bool RenderFrameProxyHost::Send(IPC::Message *msg) {
 107   // TODO(nasko): For now, RenderFrameHost uses this object to send IPC messages
 108   // while swapped out. This can be removed once we don't have a swapped out
 109   // state on RenderFrameHosts. See https://crbug.com/357747.
 110
 111   // Don't reset the routing ID for control messages.  See
 112   // https://crbug.com/423538
 113   if (msg->routing_id() != MSG_ROUTING_CONTROL)
 114     msg->set_routing_id(routing_id_);
 115   return GetProcess()->Send(msg);
 116 }
 117
 118 bool RenderFrameProxyHost::OnMessageReceived(const IPC::Message& msg) {
 119   if (cross_process_frame_connector_.get() &&
 120       cross_process_frame_connector_->OnMessageReceived(msg))
 121     return true;
 122
 123   // TODO(nasko): This can be removed once we don't have a swapped out state on
 124   // RenderFrameHosts. See https://crbug.com/357747.
 125   if (render_frame_host_.get())
 126     return render_frame_host_->OnMessageReceived(msg);
 127
 128   bool handled = true;
 129   IPC_BEGIN_MESSAGE_MAP(RenderFrameProxyHost, msg)
 130     IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
 131     IPC_MESSAGE_UNHANDLED(handled = false)
 132   IPC_END_MESSAGE_MAP()
 133   return handled;
 134 }
 135
 136 bool RenderFrameProxyHost::InitRenderFrameProxy() {
 137   // The process may (if we're sharing a process with another host that already
 138   // initialized it) or may not (we have our own process or the old process
 139   // crashed) have been initialized. Calling Init multiple times will be
 140   // ignored, so this is safe.
 141   if (!site_instance_->GetProcess()->Init())
 142     return false;
 143
 144   DCHECK(GetProcess()->HasConnection());
 145
 146   int parent_routing_id = MSG_ROUTING_NONE;
 147   if (frame_tree_node_->parent()) {
 148     parent_routing_id = frame_tree_node_->parent()
 149                             ->render_manager()
 150                             ->GetRoutingIdForSiteInstance(site_instance_.get());
 151     CHECK_NE(parent_routing_id, MSG_ROUTING_NONE);
 152   }
 153
 154   Send(new FrameMsg_NewFrameProxy(routing_id_,
 155                                   parent_routing_id,
 156                                   frame_tree_node_->frame_tree()
 157                                       ->GetRenderViewHost(site_instance_.get())
 158                                       ->GetRoutingID()));
 159
 160   return true;
 161 }
 162
 163 void RenderFrameProxyHost::DisownOpener() {
 164   Send(new FrameMsg_DisownOpener(GetRoutingID()));
 165 }
 166
 167 void RenderFrameProxyHost::OnOpenURL(
 168     const FrameHostMsg_OpenURL_Params& params) {
 169   frame_tree_node_->current_frame_host()->OpenURL(params);
 170 }
 171
 172 }  // namespace content