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