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// Copyright (c) 2011 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 WEBKIT_QUOTA_SPECIAL_STORAGE_POLICY_H_
#define WEBKIT_QUOTA_SPECIAL_STORAGE_POLICY_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "base/observer_list.h"
class GURL;
namespace quota {
// Special rights are granted to 'extensions' and 'applications'. The
// storage subsystems query this interface to determine which origins
// have these rights. Chrome provides an impl that is cognizant of what
// is currently installed in the extensions system.
// The IsSomething() methods must be thread-safe, however Observers should
// only be notified, added, and removed on the IO thead.
class SpecialStoragePolicy
: public base::RefCountedThreadSafe<SpecialStoragePolicy> {
public:
class Observer {
public:
virtual void OnSpecialStoragePolicyChanged() = 0;
protected:
virtual ~Observer();
};
SpecialStoragePolicy();
// Protected storage is not subject to removal by the browsing data remover.
virtual bool IsStorageProtected(const GURL& origin) = 0;
// Unlimited storage is not subject to 'quotas'.
virtual bool IsStorageUnlimited(const GURL& origin) = 0;
// Checks if extension identified with |extension_id| is registered as
// file handler.
virtual bool IsFileHandler(const std::string& extension_id) = 0;
// Some origins are only allowed to store session-only data which is deleted
// when the session ends.
virtual bool IsStorageSessionOnly(const GURL& origin) = 0;
// Returns true if some origins are only allowed session-only storage.
virtual bool HasSessionOnlyOrigins() = 0;
// Adds/removes an observer, the policy does not take
// ownership of the observer. Should only be called on the IO thread.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
protected:
friend class base::RefCountedThreadSafe<SpecialStoragePolicy>;
virtual ~SpecialStoragePolicy();
void NotifyObservers();
ObserverList<Observer> observers_;
};
} // namespace quota
#endif // WEBKIT_QUOTA_SPECIAL_STORAGE_POLICY_H_