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1 // Copyright (c) 2011 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_view_observer.h"
6 
7 #include "content/renderer/render_view_impl.h"
8 
9 using blink::WebFrame;
10 
11 namespace content {
12 
RenderViewObserver(RenderView * render_view)13 RenderViewObserver::RenderViewObserver(RenderView* render_view)
14     : render_view_(render_view),
15       routing_id_(MSG_ROUTING_NONE) {
16   // |render_view| can be NULL on unit testing or if Observe() is used.
17   if (render_view) {
18     RenderViewImpl* impl = static_cast<RenderViewImpl*>(render_view);
19     routing_id_ = impl->routing_id();
20     // TODO(jam): bring this back DCHECK_NE(routing_id_, MSG_ROUTING_NONE);
21     impl->AddObserver(this);
22   }
23 }
24 
~RenderViewObserver()25 RenderViewObserver::~RenderViewObserver() {
26   if (render_view_) {
27     RenderViewImpl* impl = static_cast<RenderViewImpl*>(render_view_);
28     impl->RemoveObserver(this);
29   }
30 }
31 
OnDestruct()32 void RenderViewObserver::OnDestruct() {
33   delete this;
34 }
35 
OnMessageReceived(const IPC::Message & message)36 bool RenderViewObserver::OnMessageReceived(const IPC::Message& message) {
37   return false;
38 }
39 
Send(IPC::Message * message)40 bool RenderViewObserver::Send(IPC::Message* message) {
41   if (render_view_)
42     return render_view_->Send(message);
43 
44   delete message;
45   return false;
46 }
47 
render_view() const48 RenderView* RenderViewObserver::render_view() const {
49   return render_view_;
50 }
51 
RenderViewGone()52 void RenderViewObserver::RenderViewGone() {
53   render_view_ = NULL;
54 }
55 
Observe(RenderView * render_view)56 void RenderViewObserver::Observe(RenderView* render_view) {
57   RenderViewImpl* impl = static_cast<RenderViewImpl*>(render_view_);
58   if (impl) {
59     impl->RemoveObserver(this);
60     routing_id_ = 0;
61   }
62 
63   render_view_ = render_view;
64   impl = static_cast<RenderViewImpl*>(render_view_);
65   if (impl) {
66     routing_id_ = impl->routing_id();
67     impl->AddObserver(this);
68   }
69 }
70 
71 }  // namespace content
72