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 #ifndef CHROME_BROWSER_UI_WEBUI_HELP_HELP_HANDLER_H_ 6 #define CHROME_BROWSER_UI_WEBUI_HELP_HELP_HANDLER_H_ 7 8 #include <string> 9 10 #include "base/compiler_specific.h" 11 #include "base/memory/weak_ptr.h" 12 #include "chrome/browser/ui/webui/help/version_updater.h" 13 #include "content/public/browser/notification_observer.h" 14 #include "content/public/browser/notification_registrar.h" 15 #include "content/public/browser/web_ui_message_handler.h" 16 17 #if defined(OS_CHROMEOS) 18 #include "base/platform_file.h" 19 #include "chrome/browser/chromeos/version_loader.h" 20 #endif // defined(OS_CHROMEOS) 21 22 namespace content { 23 class WebUIDataSource; 24 } 25 26 // WebUI message handler for the help page. 27 class HelpHandler : public content::WebUIMessageHandler, 28 public content::NotificationObserver { 29 public: 30 HelpHandler(); 31 virtual ~HelpHandler(); 32 33 // WebUIMessageHandler implementation. 34 virtual void RegisterMessages() OVERRIDE; 35 36 // Fills |source| with string values for the UI. 37 void GetLocalizedValues(content::WebUIDataSource* source); 38 39 // NotificationObserver implementation. 40 virtual void Observe(int type, const content::NotificationSource& source, 41 const content::NotificationDetails& details) OVERRIDE; 42 43 private: 44 // Initializes querying values for the page. 45 void OnPageLoaded(const base::ListValue* args); 46 47 #if defined(OS_MACOSX) 48 // Promotes the updater for all users. 49 void PromoteUpdater(const base::ListValue* args); 50 #endif 51 52 // Relaunches the browser. |args| must be empty. 53 void RelaunchNow(const base::ListValue* args); 54 55 // Opens the feedback dialog. |args| must be empty. 56 void OpenFeedbackDialog(const base::ListValue* args); 57 58 // Opens the help page. |args| must be empty. 59 void OpenHelpPage(const base::ListValue* args); 60 61 #if defined(OS_CHROMEOS) 62 // Sets the release track version. 63 void SetChannel(const base::ListValue* args); 64 65 // Performs relaunch and powerwash. 66 void RelaunchAndPowerwash(const base::ListValue* args); 67 #endif 68 69 // Callback method which forwards status updates to the page. 70 void SetUpdateStatus(VersionUpdater::Status status, int progress, 71 const string16& fail_message); 72 73 #if defined(OS_MACOSX) 74 // Callback method which forwards promotion state to the page. 75 void SetPromotionState(VersionUpdater::PromotionState state); 76 #endif 77 78 #if defined(OS_CHROMEOS) 79 // Callbacks from VersionLoader. 80 void OnOSVersion(const std::string& version); 81 void OnOSFirmware(const std::string& firmware); 82 void OnCurrentChannel(const std::string& channel); 83 void OnTargetChannel(const std::string& channel); 84 85 void ProcessLsbFileInfo( 86 base::PlatformFileError rv, const base::PlatformFileInfo& file_info); 87 #endif 88 89 // Specialized instance of the VersionUpdater used to update the browser. 90 scoped_ptr<VersionUpdater> version_updater_; 91 92 // Used for callbacks. 93 base::WeakPtrFactory<HelpHandler> weak_factory_; 94 95 // Used to observe notifications. 96 content::NotificationRegistrar registrar_; 97 98 #if defined(OS_CHROMEOS) 99 // Handles asynchronously loading the CrOS version info. 100 chromeos::VersionLoader loader_; 101 102 // Used to request the version. 103 CancelableTaskTracker tracker_; 104 #endif // defined(OS_CHROMEOS) 105 106 DISALLOW_COPY_AND_ASSIGN(HelpHandler); 107 }; 108 109 #endif // CHROME_BROWSER_UI_WEBUI_HELP_HELP_HANDLER_H_ 110
