content/browser/media/media_internals_handler.h

   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 #ifndef CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_HANDLER_H_
   6 #define CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_HANDLER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "content/public/browser/web_ui_message_handler.h"
  11
  12 namespace base {
  13 class ListValue;
  14 }
  15
  16 namespace content {
  17 class MediaInternalsProxy;
  18
  19 // This class handles messages to and from MediaInternalsUI.
  20 // It does all its work on the IO thread through the proxy below.
  21 class MediaInternalsMessageHandler : public WebUIMessageHandler {
  22  public:
  23   MediaInternalsMessageHandler();
  24   ~MediaInternalsMessageHandler() override;
  25
  26   // WebUIMessageHandler implementation.
  27   void RegisterMessages() override;
  28
  29   // Javascript message handlers.
  30   void OnGetEverything(const base::ListValue* list);
  31
  32   // MediaInternals message handlers.
  33   void OnUpdate(const base::string16& update);
  34
  35  private:
  36   scoped_refptr<MediaInternalsProxy> proxy_;
  37
  38   // Reflects whether the chrome://media-internals HTML+JS has finished loading.
  39   // If not, it's not safe to send JavaScript calls targeting the page yet.
  40   bool page_load_complete_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(MediaInternalsMessageHandler);
  43 };
  44
  45 }  // namespace content
  46
  47 #endif  // CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_HANDLER_H_