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      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_
     86