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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_PREFS_PREF_SET_OBSERVER_H_
#define CHROME_BROWSER_PREFS_PREF_SET_OBSERVER_H_
#pragma once
#include <set>
#include "base/basictypes.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/prefs/pref_change_registrar.h"
#include "chrome/common/notification_observer.h"
// Observes the state of a set of preferences and allows to query their combined
// managed bits.
class PrefSetObserver : public NotificationObserver {
public:
// Initialize with an empty set of preferences.
PrefSetObserver(PrefService* pref_service,
NotificationObserver* observer);
virtual ~PrefSetObserver() {}
// Add a |pref| to the set of preferences to observe.
void AddPref(const std::string& pref);
// Remove |pref| from the set of observed peferences.
void RemovePref(const std::string& pref);
// Check whether |pref| is in the set of observed preferences.
bool IsObserved(const std::string& pref);
// Check whether any of the observed preferences has the managed bit set.
bool IsManaged();
// Create a pref set observer for all preferences relevant to proxies.
static PrefSetObserver* CreateProxyPrefSetObserver(
PrefService* pref_service,
NotificationObserver* observer);
// Create a pref set observer for all preferences relevant to default search.
static PrefSetObserver* CreateDefaultSearchPrefSetObserver(
PrefService* pref_service,
NotificationObserver* observer);
private:
// Overridden from NotificationObserver.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
typedef std::set<std::string> PrefSet;
PrefSet prefs_;
PrefService* pref_service_;
PrefChangeRegistrar registrar_;
NotificationObserver* observer_;
DISALLOW_COPY_AND_ASSIGN(PrefSetObserver);
};
#endif // CHROME_BROWSER_PREFS_PREF_SET_OBSERVER_H_
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