chrome/browser/prefs/incognito_mode_prefs.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_PREFS_INCOGNITO_MODE_PREFS_H_
   6 #define CHROME_BROWSER_PREFS_INCOGNITO_MODE_PREFS_H_
   7
   8 #include "base/basictypes.h"
   9
  10 class PrefService;
  11 class Profile;
  12
  13 namespace base {
  14 class CommandLine;
  15 }
  16
  17 namespace user_prefs {
  18 class PrefRegistrySyncable;
  19 }
  20
  21 // Specifies Incognito mode availability preferences.
  22 class IncognitoModePrefs {
  23  public:
  24   // Possible values for Incognito mode availability. Please, do not change
  25   // the order of entries since numeric values are exposed to users.
  26   enum Availability {
  27     // Incognito mode enabled. Users may open pages in both Incognito mode and
  28     // normal mode (the default behaviour).
  29     ENABLED = 0,
  30     // Incognito mode disabled. Users may not open pages in Incognito mode.
  31     // Only normal mode is available for browsing.
  32     DISABLED,
  33     // Incognito mode forced. Users may open pages *ONLY* in Incognito mode.
  34     // Normal mode is not available for browsing.
  35     FORCED,
  36
  37     AVAILABILITY_NUM_TYPES
  38   };
  39
  40   // Register incognito related preferences.
  41   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
  42
  43   // Returns kIncognitoModeAvailability preference value stored
  44   // in the given pref service.
  45   static Availability GetAvailability(const PrefService* prefs);
  46
  47   // Sets kIncognitoModeAvailability preference to the specified availability
  48   // value.
  49   static void SetAvailability(PrefService* prefs,
  50                               const Availability availability);
  51
  52   // Converts in_value into the corresponding Availability value. Returns true
  53   // if conversion is successful (in_value is valid). Otherwise, returns false
  54   // and *out_value is set to ENABLED.
  55   static bool IntToAvailability(int in_value, Availability* out_value);
  56
  57   // Returns true if the browser should start in incognito mode.
  58   static bool ShouldLaunchIncognito(const base::CommandLine& command_line,
  59                                     const PrefService* prefs);
  60
  61   // Returns true if |profile| can open a new Browser. This checks the incognito
  62   // availability policies and verifies if the |profile| type is allowed to
  63   // open new windows.
  64   static bool CanOpenBrowser(Profile* profile);
  65
  66   // Returns whether parental controls have been enabled on the platform. This
  67   // method simply returns a cached value and thus the result may be stale. May
  68   // be called on any thread.
  69   static bool ArePlatformParentalControlsEnabledCached();
  70
  71 #if defined(OS_WIN)
  72   // Initializes the parental control settings. Must be called on UI thread and
  73   // before |ArePlatformParentalControlsEnabled|.
  74   static void InitializePlatformParentalControls();
  75 #endif // OS_WIN
  76
  77  private:
  78   // Returns whether parental controls have been enabled on the platform, which
  79   // if enabled will overrule the Availability as configured in prefs.
  80   static bool ArePlatformParentalControlsEnabled();
  81
  82   DISALLOW_IMPLICIT_CONSTRUCTORS(IncognitoModePrefs);
  83 };
  84
  85 #endif  // CHROME_BROWSER_PREFS_INCOGNITO_MODE_PREFS_H_