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// Copyright (c) 2010 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.
#ifndef CHROME_BROWSER_CONTENT_SETTINGS_POLICY_CONTENT_SETTINGS_PROVIDER_H_
#define CHROME_BROWSER_CONTENT_SETTINGS_POLICY_CONTENT_SETTINGS_PROVIDER_H_
#pragma once
// A content settings provider that takes its settings out of policies.
#include "base/basictypes.h"
#include "base/lock.h"
#include "chrome/browser/content_settings/content_settings_provider.h"
#include "chrome/browser/prefs/pref_change_registrar.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
class ContentSettingsDetails;
class DictionaryValue;
class PrefService;
class Profile;
class PolicyContentSettingsProvider : public ContentSettingsProviderInterface,
public NotificationObserver {
public:
explicit PolicyContentSettingsProvider(Profile* profile);
virtual ~PolicyContentSettingsProvider();
// ContentSettingsProviderInterface implementation.
virtual bool CanProvideDefaultSetting(ContentSettingsType content_type) const;
virtual ContentSetting ProvideDefaultSetting(
ContentSettingsType content_type) const;
virtual void UpdateDefaultSetting(ContentSettingsType content_type,
ContentSetting setting);
virtual void ResetToDefaults();
virtual bool DefaultSettingIsManaged(ContentSettingsType content_type) const;
static void RegisterUserPrefs(PrefService* prefs);
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
// Informs observers that content settings have changed. Make sure that
// |lock_| is not held when calling this, as listeners will usually call one
// of the GetSettings functions in response, which would then lead to a
// mutex deadlock.
void NotifyObservers(const ContentSettingsDetails& details);
void UnregisterObservers();
// Reads the policy managed default settings.
void ReadManagedDefaultSettings();
// Reads the policy controlled default settings for a specific content type.
void UpdateManagedDefaultSetting(ContentSettingsType content_type);
// Copies of the pref data, so that we can read it on the IO thread.
ContentSettings managed_default_content_settings_;
Profile* profile_;
// Whether this settings map is for an OTR session.
bool is_off_the_record_;
// Used around accesses to the managed_default_content_settings_ object to
// guarantee thread safety.
mutable Lock lock_;
PrefChangeRegistrar pref_change_registrar_;
NotificationRegistrar notification_registrar_;
DISALLOW_COPY_AND_ASSIGN(PolicyContentSettingsProvider);
};
#endif // CHROME_BROWSER_CONTENT_SETTINGS_POLICY_CONTENT_SETTINGS_PROVIDER_H_
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