content/renderer/render_frame_proxy.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/renderer/render_frame_proxy.h"
   6
   7 #include <map>
   8
   9 #include "base/lazy_instance.h"
  10 #include "content/common/frame_messages.h"
  11 #include "content/common/swapped_out_messages.h"
  12 #include "content/renderer/child_frame_compositing_helper.h"
  13 #include "content/renderer/render_frame_impl.h"
  14 #include "content/renderer/render_thread_impl.h"
  15 #include "content/renderer/render_view_impl.h"
  16 #include "third_party/WebKit/public/web/WebView.h"
  17
  18 namespace content {
  19
  20 namespace {
  21
  22 // Facilitates lookup of RenderFrameProxy by routing_id.
  23 typedef std::map<int, RenderFrameProxy*> RoutingIDProxyMap;
  24 static base::LazyInstance<RoutingIDProxyMap> g_routing_id_proxy_map =
  25     LAZY_INSTANCE_INITIALIZER;
  26
  27 // Facilitates lookup of RenderFrameProxy by WebFrame.
  28 typedef std::map<blink::WebFrame*, RenderFrameProxy*> FrameMap;
  29 base::LazyInstance<FrameMap> g_frame_map = LAZY_INSTANCE_INITIALIZER;
  30
  31 }  // namespace
  32
  33 // static
  34 RenderFrameProxy* RenderFrameProxy::CreateProxyToReplaceFrame(
  35     RenderFrameImpl* frame_to_replace,
  36     int routing_id) {
  37   CHECK_NE(routing_id, MSG_ROUTING_NONE);
  38
  39   scoped_ptr<RenderFrameProxy> proxy(
  40       new RenderFrameProxy(routing_id, frame_to_replace->GetRoutingID()));
  41
  42   blink::WebRemoteFrame* web_frame = NULL;
  43   if (frame_to_replace->GetWebFrame()->parent() &&
  44       frame_to_replace->GetWebFrame()->parent()->isWebRemoteFrame()) {
  45     blink::WebRemoteFrame* parent_web_frame =
  46         frame_to_replace->GetWebFrame()->parent()->toWebRemoteFrame();
  47     web_frame = parent_web_frame->createRemoteChild("", proxy.get());
  48   } else {
  49     web_frame = blink::WebRemoteFrame::create(proxy.get());
  50   }
  51
  52   proxy->Init(web_frame, frame_to_replace->render_view());
  53   return proxy.release();
  54 }
  55
  56 RenderFrameProxy* RenderFrameProxy::CreateFrameProxy(
  57     int routing_id,
  58     int parent_routing_id,
  59     int render_view_routing_id) {
  60   scoped_ptr<RenderFrameProxy> proxy(
  61       new RenderFrameProxy(routing_id, MSG_ROUTING_NONE));
  62   RenderViewImpl* render_view = NULL;
  63   blink::WebRemoteFrame* web_frame = NULL;
  64   if (parent_routing_id == MSG_ROUTING_NONE) {
  65     // Create a top level frame.
  66     render_view = RenderViewImpl::FromRoutingID(render_view_routing_id);
  67     web_frame = blink::WebRemoteFrame::create(proxy.get());
  68     render_view->webview()->setMainFrame(web_frame);
  69   } else {
  70     // Create a frame under an existing parent. The parent is always expected
  71     // to be a RenderFrameProxy, because navigations initiated by local frames
  72     // should not wind up here.
  73     RenderFrameProxy* parent =
  74         RenderFrameProxy::FromRoutingID(parent_routing_id);
  75     web_frame = parent->web_frame()->createRemoteChild("", proxy.get());
  76     render_view = parent->render_view();
  77   }
  78
  79   proxy->Init(web_frame, render_view);
  80
  81   return proxy.release();
  82 }
  83
  84 // static
  85 RenderFrameProxy* RenderFrameProxy::FromRoutingID(int32 routing_id) {
  86   RoutingIDProxyMap* proxies = g_routing_id_proxy_map.Pointer();
  87   RoutingIDProxyMap::iterator it = proxies->find(routing_id);
  88   return it == proxies->end() ? NULL : it->second;
  89 }
  90
  91 // static
  92 RenderFrameProxy* RenderFrameProxy::FromWebFrame(blink::WebFrame* web_frame) {
  93   FrameMap::iterator iter = g_frame_map.Get().find(web_frame);
  94   if (iter != g_frame_map.Get().end()) {
  95     RenderFrameProxy* proxy = iter->second;
  96     DCHECK_EQ(web_frame, proxy->web_frame());
  97     return proxy;
  98   }
  99   return NULL;
 100 }
 101
 102 RenderFrameProxy::RenderFrameProxy(int routing_id, int frame_routing_id)
 103     : routing_id_(routing_id),
 104       frame_routing_id_(frame_routing_id),
 105       web_frame_(NULL),
 106       render_view_(NULL) {
 107   std::pair<RoutingIDProxyMap::iterator, bool> result =
 108       g_routing_id_proxy_map.Get().insert(std::make_pair(routing_id_, this));
 109   CHECK(result.second) << "Inserting a duplicate item.";
 110   RenderThread::Get()->AddRoute(routing_id_, this);
 111 }
 112
 113 RenderFrameProxy::~RenderFrameProxy() {
 114   render_view()->UnregisterRenderFrameProxy(this);
 115
 116   FrameMap::iterator it = g_frame_map.Get().find(web_frame_);
 117   CHECK(it != g_frame_map.Get().end());
 118   CHECK_EQ(it->second, this);
 119   g_frame_map.Get().erase(it);
 120
 121   RenderThread::Get()->RemoveRoute(routing_id_);
 122   g_routing_id_proxy_map.Get().erase(routing_id_);
 123
 124   // TODO(nick): Call close unconditionally when web_frame() is always remote.
 125   if (web_frame()->isWebRemoteFrame())
 126     web_frame()->close();
 127 }
 128
 129 void RenderFrameProxy::Init(blink::WebRemoteFrame* web_frame,
 130                             RenderViewImpl* render_view) {
 131   CHECK(web_frame);
 132   CHECK(render_view);
 133
 134   web_frame_ = web_frame;
 135   render_view_ = render_view;
 136
 137   // TODO(nick): Should all RenderFrameProxies remain observers of their views?
 138   render_view_->RegisterRenderFrameProxy(this);
 139
 140   std::pair<FrameMap::iterator, bool> result =
 141       g_frame_map.Get().insert(std::make_pair(web_frame_, this));
 142   CHECK(result.second) << "Inserted a duplicate item.";
 143 }
 144
 145 void RenderFrameProxy::DidCommitCompositorFrame() {
 146   if (compositing_helper_)
 147     compositing_helper_->DidCommitCompositorFrame();
 148 }
 149
 150 bool RenderFrameProxy::OnMessageReceived(const IPC::Message& msg) {
 151   bool handled = true;
 152   IPC_BEGIN_MESSAGE_MAP(RenderFrameProxy, msg)
 153     IPC_MESSAGE_HANDLER(FrameMsg_DeleteProxy, OnDeleteProxy)
 154     IPC_MESSAGE_HANDLER(FrameMsg_ChildFrameProcessGone, OnChildFrameProcessGone)
 155     IPC_MESSAGE_HANDLER(FrameMsg_BuffersSwapped, OnBuffersSwapped)
 156     IPC_MESSAGE_HANDLER_GENERIC(FrameMsg_CompositorFrameSwapped,
 157                                 OnCompositorFrameSwapped(msg))
 158     IPC_MESSAGE_UNHANDLED(handled = false)
 159   IPC_END_MESSAGE_MAP()
 160
 161   // If |handled| is true, |this| may have been deleted.
 162   if (handled)
 163     return true;
 164
 165   RenderFrameImpl* render_frame =
 166       RenderFrameImpl::FromRoutingID(frame_routing_id_);
 167   return render_frame && render_frame->OnMessageReceived(msg);
 168 }
 169
 170 bool RenderFrameProxy::Send(IPC::Message* message) {
 171   if (!SwappedOutMessages::CanSendWhileSwappedOut(message)) {
 172     delete message;
 173     return false;
 174   }
 175   message->set_routing_id(routing_id_);
 176   return RenderThread::Get()->Send(message);
 177 }
 178
 179 void RenderFrameProxy::OnDeleteProxy() {
 180   RenderFrameImpl* render_frame =
 181       RenderFrameImpl::FromRoutingID(frame_routing_id_);
 182
 183   if (render_frame)
 184     render_frame->set_render_frame_proxy(NULL);
 185
 186   delete this;
 187 }
 188
 189 void RenderFrameProxy::OnChildFrameProcessGone() {
 190   if (compositing_helper_)
 191     compositing_helper_->ChildFrameGone();
 192 }
 193
 194 void RenderFrameProxy::OnBuffersSwapped(
 195     const FrameMsg_BuffersSwapped_Params& params) {
 196   if (!compositing_helper_) {
 197     compositing_helper_ =
 198         ChildFrameCompositingHelper::CreateForRenderFrameProxy(this);
 199     compositing_helper_->EnableCompositing(true);
 200   }
 201   compositing_helper_->OnBuffersSwapped(
 202       params.size,
 203       params.mailbox,
 204       params.gpu_route_id,
 205       params.gpu_host_id,
 206       web_frame()->view()->deviceScaleFactor());
 207 }
 208
 209 void RenderFrameProxy::OnCompositorFrameSwapped(const IPC::Message& message) {
 210   FrameMsg_CompositorFrameSwapped::Param param;
 211   if (!FrameMsg_CompositorFrameSwapped::Read(&message, &param))
 212     return;
 213
 214   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
 215   param.a.frame.AssignTo(frame.get());
 216
 217   if (!compositing_helper_) {
 218     compositing_helper_ =
 219         ChildFrameCompositingHelper::CreateForRenderFrameProxy(this);
 220     compositing_helper_->EnableCompositing(true);
 221   }
 222   compositing_helper_->OnCompositorFrameSwapped(frame.Pass(),
 223                                                 param.a.producing_route_id,
 224                                                 param.a.output_surface_id,
 225                                                 param.a.producing_host_id,
 226                                                 param.a.shared_memory_handle);
 227 }
 228
 229 }  // namespace