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/browser/media/media_internals_handler.h" 6 7 #include "base/bind.h" 8 #include "base/bind_helpers.h" 9 #include "base/values.h" 10 #include "content/browser/media/media_internals_proxy.h" 11 #include "content/public/browser/browser_thread.h" 12 #include "content/public/browser/render_view_host.h" 13 #include "content/public/browser/web_contents.h" 14 #include "content/public/browser/web_ui.h" 15 16 namespace content { 17 MediaInternalsMessageHandler()18MediaInternalsMessageHandler::MediaInternalsMessageHandler() 19 : proxy_(new MediaInternalsProxy()), 20 page_load_complete_(false) {} 21 ~MediaInternalsMessageHandler()22MediaInternalsMessageHandler::~MediaInternalsMessageHandler() { 23 proxy_->Detach(); 24 } 25 RegisterMessages()26void MediaInternalsMessageHandler::RegisterMessages() { 27 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 28 proxy_->Attach(this); 29 30 web_ui()->RegisterMessageCallback("getEverything", 31 base::Bind(&MediaInternalsMessageHandler::OnGetEverything, 32 base::Unretained(this))); 33 } 34 OnGetEverything(const base::ListValue * list)35void MediaInternalsMessageHandler::OnGetEverything( 36 const base::ListValue* list) { 37 page_load_complete_ = true; 38 proxy_->GetEverything(); 39 } 40 OnUpdate(const base::string16 & update)41void MediaInternalsMessageHandler::OnUpdate(const base::string16& update) { 42 // Don't try to execute JavaScript in a RenderView that no longer exists nor 43 // if the chrome://media-internals page hasn't finished loading. 44 RenderViewHost* host = web_ui()->GetWebContents()->GetRenderViewHost(); 45 if (host && page_load_complete_) 46 host->ExecuteJavascriptInWebFrame(base::string16(), update); 47 } 48 49 } // namespace content 50