src/content/browser/media/media_internals_handler.cc

   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