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