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 "base/scoped_observer.h"
  12 #include "content/public/browser/web_ui_message_handler.h"
  13 #include "extensions/browser/extension_registry_observer.h"
  14
  15 namespace base {
  16 class ListValue;
  17 }
  18
  19 namespace extensions {
  20 class ExtensionRegistry;
  21 }
  22
  23 namespace app_list {
  24
  25 // Handler for the app launcher start page.
  26 class StartPageHandler : public content::WebUIMessageHandler,
  27                          public extensions::ExtensionRegistryObserver {
  28  public:
  29   StartPageHandler();
  30   ~StartPageHandler() override;
  31
  32  private:
  33   // content::WebUIMessageHandler overrides:
  34   void RegisterMessages() override;
  35
  36   // extensions::ExtensionRegistryObserver implementation.
  37   void OnExtensionLoaded(content::BrowserContext* browser_context,
  38                          const extensions::Extension* extension) override;
  39   void OnExtensionUnloaded(
  40       content::BrowserContext* browser_context,
  41       const extensions::Extension* extension,
  42       extensions::UnloadedExtensionInfo::Reason reason) override;
  43
  44 #if defined(OS_CHROMEOS)
  45   // Called when the pref has been changed.
  46   void OnHotwordEnabledChanged();
  47 #endif
  48
  49   // JS callbacks.
  50   void HandleAppListShown(const base::ListValue* args);
  51   void HandleDoodleClicked(const base::ListValue* args);
  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   PrefChangeRegistrar pref_change_registrar_;
  59
  60   ScopedObserver<extensions::ExtensionRegistry,
  61                  extensions::ExtensionRegistryObserver>
  62       extension_registry_observer_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(StartPageHandler);
  65 };
  66
  67 }  // namespace app_list
  68
  69 #endif  // CHROME_BROWSER_UI_WEBUI_APP_LIST_START_PAGE_HANDLER_H_