blob: 5c97806a0b8d0beb4cb9cb1ec6ca296ea41bd30d [file] [log] [blame]
// Copyright 2013 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 <string>
#include "base/memory/ref_counted.h"
#include "base/observer_list.h"
#include "storage/browser/storage_browser_export.h"
class GURL;
namespace storage {
// 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 STORAGE_EXPORT SpecialStoragePolicy
: public base::RefCountedThreadSafe<SpecialStoragePolicy> {
typedef int StoragePolicy;
enum ChangeFlags {
class STORAGE_EXPORT Observer {
virtual void OnGranted(const GURL& origin, int change_flags) = 0;
virtual void OnRevoked(const GURL& origin, int change_flags) = 0;
virtual void OnCleared() = 0;
virtual ~Observer();
// 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 quota or storage pressure eviction.
virtual bool IsStorageUnlimited(const GURL& origin) = 0;
// Durable storage is not subject to storage pressure eviction.
virtual bool IsStorageDurable(const GURL& origin) = 0;
// Some origins (e.g. installed apps) have access to the size of the remaining
// disk capacity.
virtual bool CanQueryDiskSize(const GURL& origin) = 0;
// Checks if the origin contains per-site isolated storage.
virtual bool HasIsolatedStorage(const GURL& origin) = 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);
friend class base::RefCountedThreadSafe<SpecialStoragePolicy>;
virtual ~SpecialStoragePolicy();
void NotifyGranted(const GURL& origin, int change_flags);
void NotifyRevoked(const GURL& origin, int change_flags);
void NotifyCleared();
base::ObserverList<Observer> observers_;
} // namespace storage