content/public/renderer/render_frame_observer.cc

   1 // Copyright 2013 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/public/renderer/render_frame_observer.h"
   6
   7 #include "content/renderer/render_frame_impl.h"
   8
   9 using blink::WebFrame;
  10
  11 namespace content {
  12
  13 RenderFrameObserver::RenderFrameObserver(RenderFrame* render_frame)
  14     : render_frame_(render_frame),
  15       routing_id_(MSG_ROUTING_NONE) {
  16   // |render_frame| can be NULL on unit testing.
  17   if (render_frame) {
  18     RenderFrameImpl* impl = static_cast<RenderFrameImpl*>(render_frame);
  19     routing_id_ = impl->GetRoutingID();
  20     DCHECK_NE(routing_id_, MSG_ROUTING_NONE);
  21     impl->AddObserver(this);
  22   }
  23 }
  24
  25 RenderFrameObserver::~RenderFrameObserver() {
  26   if (render_frame_) {
  27     RenderFrameImpl* impl = static_cast<RenderFrameImpl*>(render_frame_);
  28     impl->RemoveObserver(this);
  29   }
  30 }
  31
  32 void RenderFrameObserver::OnDestruct() {
  33   delete this;
  34 }
  35
  36 bool RenderFrameObserver::OnMessageReceived(const IPC::Message& message) {
  37   return false;
  38 }
  39
  40 bool RenderFrameObserver::Send(IPC::Message* message) {
  41   if (render_frame_)
  42     return render_frame_->Send(message);
  43
  44   delete message;
  45   return false;
  46 }
  47
  48 RenderFrame* RenderFrameObserver::render_frame() const {
  49   return render_frame_;
  50 }
  51
  52 void RenderFrameObserver::RenderFrameGone() {
  53   render_frame_ = NULL;
  54 }
  55
  56 }  // namespace content