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      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 
     18 MediaInternalsMessageHandler::MediaInternalsMessageHandler()
     19     : proxy_(new MediaInternalsProxy()) {}
     20 
     21 MediaInternalsMessageHandler::~MediaInternalsMessageHandler() {
     22   proxy_->Detach();
     23 }
     24 
     25 void MediaInternalsMessageHandler::RegisterMessages() {
     26   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     27   proxy_->Attach(this);
     28 
     29   web_ui()->RegisterMessageCallback("getEverything",
     30       base::Bind(&MediaInternalsMessageHandler::OnGetEverything,
     31                  base::Unretained(this)));
     32 }
     33 
     34 void MediaInternalsMessageHandler::OnGetEverything(
     35     const base::ListValue* list) {
     36   proxy_->GetEverything();
     37 }
     38 
     39 void MediaInternalsMessageHandler::OnUpdate(const string16& update) {
     40   // Don't try to execute JavaScript in a RenderView that no longer exists.
     41   RenderViewHost* host = web_ui()->GetWebContents()->GetRenderViewHost();
     42   if (host)
     43     host->ExecuteJavascriptInWebFrame(string16(), update);
     44 }
     45 
     46 }  // namespace content
     47