chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.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_CHROMEOS_KIOSK_MODE_KIOSK_MODE_SETTINGS_H_
   6 #define CHROME_BROWSER_CHROMEOS_KIOSK_MODE_KIOSK_MODE_SETTINGS_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback_forward.h"
  12 #include "base/time/time.h"
  13 #include "chrome/browser/chromeos/policy/app_pack_updater.h"
  14 #include "chrome/browser/chromeos/settings/device_settings_service.h"
  15
  16 namespace base {
  17 template <typename T> struct DefaultLazyInstanceTraits;
  18 }
  19
  20 namespace chromeos {
  21
  22 // This class centralizes all our code to get KioskMode settings; since
  23 // KioskMode interferes with normal operations all over Chrome, having all
  24 // data about it pulled from a central location would make future
  25 // refactorings easier. This class also handles getting trust for the policies
  26 // via its init method.
  27 //
  28 // Note: If Initialize is not called before the various Getters, we'll return
  29 // invalid values.
  30 class KioskModeSettings {
  31  public:
  32   static KioskModeSettings* Get();
  33
  34   // This method checks if Kiosk Mode is enabled or not.
  35   virtual bool IsKioskModeEnabled();
  36
  37   // Initialize the settings; this will call the callback once trust is
  38   // established with the policy settings provider.
  39   virtual void Initialize(const base::Closure& notify_initialized);
  40   virtual bool is_initialized() const;
  41
  42   // The path to the screensaver extension. This callback may get called
  43   // very late, or even never (depending on the state of the app pack).
  44   virtual void GetScreensaverPath(
  45       policy::AppPackUpdater::ScreenSaverUpdateCallback callback) const;
  46
  47   // The timeout before which we'll start showing the screensaver.
  48   virtual base::TimeDelta GetScreensaverTimeout() const;
  49
  50   // NOTE: The idle logout timeout is the time 'till' we show the idle dialog
  51   // box. After we show the dialog box, it remains up for an 'additional'
  52   // IdleLogoutWarningTimeout seconds, which adds to the total time before the
  53   // user is logged out.
  54   // The time to logout the user in on idle.
  55   virtual base::TimeDelta GetIdleLogoutTimeout() const;
  56
  57   // The time to show the countdown timer for.
  58   virtual base::TimeDelta GetIdleLogoutWarningDuration() const;
  59
  60   static const int kMaxIdleLogoutTimeout;
  61   static const int kMinIdleLogoutTimeout;
  62
  63   static const int kMaxIdleLogoutWarningDuration;
  64   static const int kMinIdleLogoutWarningDuration;
  65
  66  protected:
  67   // Needed here so MockKioskModeSettings can inherit from us.
  68   KioskModeSettings();
  69   virtual ~KioskModeSettings();
  70
  71  private:
  72   friend struct base::DefaultLazyInstanceTraits<KioskModeSettings>;
  73   friend class KioskModeSettingsTest;
  74
  75   // Makes sure the browser will switch to kiosk mode if cryptohome was not
  76   // ready when the browser was starting after a machine reboot.
  77   void VerifyModeIsKnown(DeviceSettingsService::OwnershipStatus status);
  78
  79   bool is_initialized_;
  80   bool is_kiosk_mode_;
  81
  82   // Used for testing.
  83   void set_initialized(bool value) { is_initialized_ = value; }
  84
  85   std::string screensaver_id_;
  86   std::string screensaver_path_;
  87   base::TimeDelta screensaver_timeout_;
  88   base::TimeDelta idle_logout_timeout_;
  89   base::TimeDelta idle_logout_warning_duration_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(KioskModeSettings);
  92 };
  93
  94 }  // namespace chromeos
  95
  96 #endif  // CHROME_BROWSER_CHROMEOS_KIOSK_MODE_KIOSK_MODE_SETTINGS_H_