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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/prefs/incognito_mode_prefs.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/prefs/pref_service.h"
#include "base/threading/thread_restrictions.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "content/public/browser/browser_thread.h"
#if defined(OS_WIN)
#include <windows.h>
#include <wpcapi.h>
#include "base/win/scoped_comptr.h"
#include "base/win/windows_version.h"
#endif // OS_WIN
#if defined(OS_ANDROID)
#include "chrome/browser/android/chromium_application.h"
#endif // OS_ANDROID
using content::BrowserThread;
#if defined(OS_WIN)
namespace {
// Returns true if Windows Parental control activity logging is enabled. This
// feature is available on Windows 7 and beyond. This function should be called
// on a COM Initialized thread and is potentially blocking.
bool IsParentalControlActivityLoggingOn() {
// Since we can potentially block, make sure the thread is okay with this.
base::ThreadRestrictions::AssertIOAllowed();
base::ThreadRestrictions::AssertWaitAllowed();
// Query this info on Windows 7 and above.
if (base::win::GetVersion() < base::win::VERSION_WIN7)
return false;
base::win::ScopedComPtr<IWindowsParentalControlsCore> parent_controls;
HRESULT hr = parent_controls.CreateInstance(
__uuidof(WindowsParentalControls));
if (FAILED(hr))
return false;
base::win::ScopedComPtr<IWPCSettings> settings;
hr = parent_controls->GetUserSettings(nullptr, settings.Receive());
if (FAILED(hr))
return false;
unsigned long restrictions = 0;
settings->GetRestrictions(&restrictions);
return (restrictions & WPCFLAG_LOGGING_REQUIRED) == WPCFLAG_LOGGING_REQUIRED;
}
} // namespace
#endif // OS_WIN
// static
bool IncognitoModePrefs::IntToAvailability(int in_value,
Availability* out_value) {
if (in_value < 0 || in_value >= AVAILABILITY_NUM_TYPES) {
*out_value = ENABLED;
return false;
}
*out_value = static_cast<Availability>(in_value);
return true;
}
// static
IncognitoModePrefs::Availability IncognitoModePrefs::GetAvailability(
const PrefService* pref_service) {
DCHECK(pref_service);
int pref_value = pref_service->GetInteger(prefs::kIncognitoModeAvailability);
Availability result = IncognitoModePrefs::ENABLED;
bool valid = IntToAvailability(pref_value, &result);
DCHECK(valid);
if (ArePlatformParentalControlsEnabled()) {
if (result == IncognitoModePrefs::FORCED)
LOG(ERROR) << "Ignoring FORCED incognito. Parental control logging on";
return IncognitoModePrefs::DISABLED;
}
return result;
}
// static
void IncognitoModePrefs::SetAvailability(PrefService* prefs,
const Availability availability) {
prefs->SetInteger(prefs::kIncognitoModeAvailability, availability);
}
// static
void IncognitoModePrefs::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
registry->RegisterIntegerPref(prefs::kIncognitoModeAvailability,
IncognitoModePrefs::ENABLED);
}
// static
bool IncognitoModePrefs::ShouldLaunchIncognito(
const base::CommandLine& command_line,
const PrefService* prefs) {
Availability incognito_avail = GetAvailability(prefs);
return incognito_avail != IncognitoModePrefs::DISABLED &&
(command_line.HasSwitch(switches::kIncognito) ||
incognito_avail == IncognitoModePrefs::FORCED);
}
// static
bool IncognitoModePrefs::CanOpenBrowser(Profile* profile) {
if (profile->IsGuestSession())
return true;
switch (GetAvailability(profile->GetPrefs())) {
case IncognitoModePrefs::ENABLED:
return true;
case IncognitoModePrefs::DISABLED:
return !profile->IsOffTheRecord();
case IncognitoModePrefs::FORCED:
return profile->IsOffTheRecord();
default:
NOTREACHED();
return false;
}
}
// static
bool IncognitoModePrefs::ArePlatformParentalControlsEnabled() {
#if defined(OS_WIN)
enum class ParentalControlsState {
UNKNOWN = 0,
ACTIVITY_LOGGING_DISABLED = 1,
ACTIVITY_LOGGING_ENABLED = 2,
};
static ParentalControlsState parental_controls_state =
ParentalControlsState::UNKNOWN;
if (parental_controls_state == ParentalControlsState::UNKNOWN) {
// Production: The thread isn't initialized, so we're the only thread that
// should be able to update this.
// Test: The thread may be initialized, so check that it's the UI thread.
DCHECK(!BrowserThread::IsThreadInitialized(BrowserThread::UI) ||
BrowserThread::CurrentlyOn(BrowserThread::UI));
parental_controls_state =
IsParentalControlActivityLoggingOn() ?
ParentalControlsState::ACTIVITY_LOGGING_ENABLED :
ParentalControlsState::ACTIVITY_LOGGING_DISABLED;
}
return parental_controls_state ==
ParentalControlsState::ACTIVITY_LOGGING_ENABLED;
#elif defined(OS_ANDROID)
return chrome::android::ChromiumApplication::AreParentalControlsEnabled();
#else
return false;
#endif
}
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