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.
5 #ifndef CHROME_BROWSER_UI_WEBUI_APP_LIST_START_PAGE_HANDLER_H_
6 #define CHROME_BROWSER_UI_WEBUI_APP_LIST_START_PAGE_HANDLER_H_
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 "chrome/browser/ui/app_list/recommended_apps_observer.h"
13 #include "content/public/browser/web_ui_message_handler.h"
14 #include "extensions/browser/extension_registry_observer.h"
20 namespace extensions {
21 class ExtensionRegistry;
26 class RecommendedApps;
28 // Handler for the app launcher start page.
29 class StartPageHandler : public content::WebUIMessageHandler,
30 public extensions::ExtensionRegistryObserver,
31 public RecommendedAppsObserver {
34 ~StartPageHandler() override;
37 // content::WebUIMessageHandler overrides:
38 void RegisterMessages() override;
40 // extensions::ExtensionRegistryObserver implementation.
41 void OnExtensionLoaded(content::BrowserContext* browser_context,
42 const extensions::Extension* extension) override;
43 void OnExtensionUnloaded(
44 content::BrowserContext* browser_context,
45 const extensions::Extension* extension,
46 extensions::UnloadedExtensionInfo::Reason reason) override;
48 // RecommendedAppsObserver overrdies:
49 void OnRecommendedAppsChanged() override;
51 // Creates a ListValue for the recommended apps and sends it to js side.
52 void SendRecommendedApps();
54 #if defined(OS_CHROMEOS)
55 // Called when the pref has been changed.
56 void OnHotwordEnabledChanged();
60 void HandleInitialize(const base::ListValue* args);
61 void HandleLaunchApp(const base::ListValue* args);
62 void HandleSpeechResult(const base::ListValue* args);
63 void HandleSpeechSoundLevel(const base::ListValue* args);
64 void HandleSpeechRecognition(const base::ListValue* args);
66 RecommendedApps* recommended_apps_; // Not owned.
67 PrefChangeRegistrar pref_change_registrar_;
69 ScopedObserver<extensions::ExtensionRegistry,
70 extensions::ExtensionRegistryObserver>
71 extension_registry_observer_;
73 DISALLOW_COPY_AND_ASSIGN(StartPageHandler);
76 } // namespace app_list
78 #endif // CHROME_BROWSER_UI_WEBUI_APP_LIST_START_PAGE_HANDLER_H_