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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.
#ifndef CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_PREF_PROVIDER_H_
#define CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_PREF_PROVIDER_H_
// A content settings provider that takes its settings out of the pref service.
#include <vector>
#include "base/basictypes.h"
#include "base/synchronization/lock.h"
#include "chrome/browser/api/prefs/pref_change_registrar.h"
#include "chrome/browser/content_settings/content_settings_observable_provider.h"
#include "chrome/browser/content_settings/content_settings_origin_identifier_value_map.h"
#include "chrome/browser/content_settings/content_settings_utils.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class PrefService;
namespace base {
class DictionaryValue;
}
namespace content_settings {
// Content settings provider that provides content settings from the user
// preference.
class PrefProvider : public ObservableProvider,
public content::NotificationObserver {
public:
static void RegisterUserPrefs(PrefService* prefs);
PrefProvider(PrefService* prefs,
bool incognito);
virtual ~PrefProvider();
// ProviderInterface implementations.
virtual RuleIterator* GetRuleIterator(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
bool incognito) const OVERRIDE;
virtual bool SetWebsiteSetting(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
Value* value) OVERRIDE;
virtual void ClearAllContentSettingsRules(
ContentSettingsType content_type) OVERRIDE;
virtual void ShutdownOnUIThread() OVERRIDE;
// content::NotificationObserver implementation.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
private:
friend class DeadlockCheckerThread; // For testing.
// Reads all content settings exceptions from the preference and load them
// into the |value_map_|. The |value_map_| is cleared first if |overwrite| is
// true.
void ReadContentSettingsFromPref(bool overwrite);
// Update the preference that stores content settings exceptions and syncs the
// value to the obsolete preference. When calling this function, |lock_|
// should not be held, since this function will send out notifications of
// preference changes.
void UpdatePref(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
const base::Value* value);
// Updates the given |pattern_pairs_settings| dictionary value.
void UpdatePatternPairsSettings(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
const base::Value* value,
DictionaryValue* pattern_pairs_settings);
void MigrateObsoleteClearOnExitPref();
void MigrateObsoleteContentSettingsPatternPref();
void MigrateObsoleteGeolocationPref();
void MigrateObsoleteNotificationsPrefs();
static void CanonicalizeContentSettingsExceptions(
base::DictionaryValue* all_settings_dictionary);
// In the debug mode, asserts that |lock_| is not held by this thread. It's
// ok if some other thread holds |lock_|, as long as it will eventually
// release it.
void AssertLockNotHeld() const;
// Weak; owned by the Profile and reset in ShutdownOnUIThread.
PrefService* prefs_;
bool is_incognito_;
PrefChangeRegistrar pref_change_registrar_;
// Whether we are currently updating preferences, this is used to ignore
// notifications from the preferences service that we triggered ourself.
bool updating_preferences_;
OriginIdentifierValueMap value_map_;
OriginIdentifierValueMap incognito_value_map_;
// Used around accesses to the value map objects to guarantee thread safety.
mutable base::Lock lock_;
DISALLOW_COPY_AND_ASSIGN(PrefProvider);
};
} // namespace content_settings
#endif // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_PREF_PROVIDER_H_
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