chrome/browser/ui/webui/app_list/start_page_handler.h

   1 // Copyright 2013 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 CHROME_BROWSER_UI_WEBUI_APP_LIST_START_PAGE_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_APP_LIST_START_PAGE_HANDLER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/prefs/pref_change_registrar.h"
  11 #include "chrome/browser/ui/app_list/recommended_apps_observer.h"
  12 #include "content/public/browser/web_ui_message_handler.h"
  13
  14 namespace base {
  15 class ListValue;
  16 }
  17
  18 namespace app_list {
  19
  20 class RecommendedApps;
  21
  22 // Handler for the app launcher start page.
  23 class StartPageHandler : public content::WebUIMessageHandler,
  24                          public RecommendedAppsObserver {
  25  public:
  26   StartPageHandler();
  27   virtual ~StartPageHandler();
  28
  29  private:
  30   // content::WebUIMessageHandler overrides:
  31   virtual void RegisterMessages() OVERRIDE;
  32
  33   // RecommendedAppsObserver overrdies:
  34   virtual void OnRecommendedAppsChanged() OVERRIDE;
  35
  36   // Creates a ListValue for the recommended apps and sends it to js side.
  37   void SendRecommendedApps();
  38
  39 #if defined(OS_CHROMEOS)
  40   // Returns true if the hotword is enabled.
  41   bool HotwordEnabled();
  42
  43   // Called when the pref has been changed.
  44   void OnHotwordEnabledChanged();
  45
  46   // Called when the availability of the hotword for NTP is changed. The new
  47   // value has to be propagated.
  48   void SynchronizeHotwordEnabled();
  49 #endif
  50
  51   // JS callbacks.
  52   void HandleInitialize(const base::ListValue* args);
  53   void HandleLaunchApp(const base::ListValue* args);
  54   void HandleSpeechResult(const base::ListValue* args);
  55   void HandleSpeechSoundLevel(const base::ListValue* args);
  56   void HandleSpeechRecognition(const base::ListValue* args);
  57
  58   RecommendedApps* recommended_apps_;  // Not owned.
  59   PrefChangeRegistrar pref_change_registrar_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(StartPageHandler);
  62 };
  63
  64 }  // namespace app_list
  65
  66 #endif  // CHROME_BROWSER_UI_WEBUI_APP_LIST_START_PAGE_HANDLER_H_