chrome/browser/ui/webui/help/help_handler.h

   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 base::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 #endif
  85
  86   // Specialized instance of the VersionUpdater used to update the browser.
  87   scoped_ptr<VersionUpdater> version_updater_;
  88
  89   // Used to observe notifications.
  90   content::NotificationRegistrar registrar_;
  91
  92 #if defined(OS_CHROMEOS)
  93   // Handles asynchronously loading the CrOS version info.
  94   chromeos::VersionLoader loader_;
  95
  96   // Used to request the version.
  97   base::CancelableTaskTracker tracker_;
  98 #endif  // defined(OS_CHROMEOS)
  99
 100   // Used for callbacks.
 101   base::WeakPtrFactory<HelpHandler> weak_factory_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(HelpHandler);
 104 };
 105
 106 #endif  // CHROME_BROWSER_UI_WEBUI_HELP_HELP_HANDLER_H_