1 // Copyright (c) 2012 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/browser/web_contents_observer.h" 6 7 #include "content/browser/web_contents/web_contents_impl.h" 8 #include "content/public/browser/navigation_details.h" 9 #include "content/public/browser/render_view_host.h" 10 11 namespace content { 12 13 WebContentsObserver::WebContentsObserver(WebContents* web_contents) 14 : web_contents_(NULL) { 15 Observe(web_contents); 16 } 17 18 WebContentsObserver::WebContentsObserver() 19 : web_contents_(NULL) { 20 } 21 22 WebContentsObserver::~WebContentsObserver() { 23 if (web_contents_) 24 web_contents_->RemoveObserver(this); 25 } 26 27 WebContents* WebContentsObserver::web_contents() const { 28 return web_contents_; 29 } 30 31 void WebContentsObserver::Observe(WebContents* web_contents) { 32 if (web_contents_) 33 web_contents_->RemoveObserver(this); 34 web_contents_ = static_cast<WebContentsImpl*>(web_contents); 35 if (web_contents_) { 36 web_contents_->AddObserver(this); 37 } 38 } 39 40 bool WebContentsObserver::OnMessageReceived(const IPC::Message& message) { 41 return false; 42 } 43 44 bool WebContentsObserver::Send(IPC::Message* message) { 45 if (!web_contents_) { 46 delete message; 47 return false; 48 } 49 50 return web_contents_->Send(message); 51 } 52 53 int WebContentsObserver::routing_id() const { 54 if (!web_contents_) 55 return MSG_ROUTING_NONE; 56 57 return web_contents_->GetRoutingID(); 58 } 59 60 void WebContentsObserver::WebContentsImplDestroyed() { 61 // Do cleanup so that 'this' can safely be deleted from WebContentsDestroyed. 62 web_contents_->RemoveObserver(this); 63 WebContentsImpl* contents = web_contents_; 64 web_contents_ = NULL; 65 WebContentsDestroyed(contents); 66 } 67 68 } // namespace content 69
