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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_Storage_h
#define mozilla_dom_Storage_h
#include "mozilla/Attributes.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/Maybe.h"
#include "nsCycleCollectionParticipant.h"
#include "nsCOMPtr.h"
#include "nsWrapperCache.h"
#include "nsISupports.h"
class nsIPrincipal;
class nsPIDOMWindowInner;
namespace mozilla {
namespace dom {
class Storage : public nsISupports, public nsWrapperCache {
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Storage)
Storage(nsPIDOMWindowInner* aWindow, nsIPrincipal* aPrincipal,
nsIPrincipal* aStoragePrincipal);
static bool StoragePrefIsEnabled();
enum StorageType {
eSessionStorage,
eLocalStorage,
ePartitionedLocalStorage,
};
virtual StorageType Type() const = 0;
virtual bool IsForkOf(const Storage* aStorage) const = 0;
virtual int64_t GetOriginQuotaUsage() const = 0;
nsIPrincipal* Principal() const { return mPrincipal; }
nsIPrincipal* StoragePrincipal() const { return mStoragePrincipal; }
// WebIDL
JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
nsPIDOMWindowInner* GetParentObject() const { return mWindow; }
virtual uint32_t GetLength(nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv) = 0;
virtual void Key(uint32_t aIndex, nsAString& aResult,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) = 0;
virtual void GetItem(const nsAString& aKey, nsAString& aResult,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) = 0;
virtual void GetSupportedNames(nsTArray<nsString>& aKeys) = 0;
void NamedGetter(const nsAString& aKey, bool& aFound, nsAString& aResult,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
GetItem(aKey, aResult, aSubjectPrincipal, aRv);
aFound = !aResult.IsVoid();
}
virtual void SetItem(const nsAString& aKey, const nsAString& aValue,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) = 0;
void NamedSetter(const nsAString& aKey, const nsAString& aValue,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
SetItem(aKey, aValue, aSubjectPrincipal, aRv);
}
virtual void RemoveItem(const nsAString& aKey,
nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv) = 0;
void NamedDeleter(const nsAString& aKey, bool& aFound,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
RemoveItem(aKey, aSubjectPrincipal, aRv);
aFound = !aRv.ErrorCodeIs(NS_SUCCESS_DOM_NO_OPERATION);
}
virtual void Clear(nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) = 0;
bool IsSessionOnly() const { return mIsSessionOnly; }
//////////////////////////////////////////////////////////////////////////////
// Testing Methods:
//
// These methods are exposed on the `Storage` WebIDL interface behind a
// preference for the benefit of automated-tests. They are not exposed to
// content. See `Storage.webidl` for more details.
virtual void Open(nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {}
virtual void Close(nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {}
virtual void BeginExplicitSnapshot(nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv) {}
virtual void EndExplicitSnapshot(nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv) {}
virtual bool GetHasActiveSnapshot(nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv) {
return false;
}
//////////////////////////////////////////////////////////////////////////////
// Dispatch storage notification events on all impacted pages in the current
// process as well as for consumption by devtools. Pages receive the
// notification via StorageNotifierService (not observers like in the past),
// while devtools does receive the notification via the observer service.
//
// aStorage can be null if this method is called by LocalStorageCacheChild.
//
// aImmediateDispatch is for use by child IPC code (LocalStorageCacheChild)
// so that PBackground ordering can be maintained. Without this, the event
// would be enqueued and run in a future turn of the event loop, potentially
// allowing other PBackground Recv* methods to trigger script that wants to
// assume our localstorage changes have already been applied. This is the
// case for message manager messages which are used by ContentTask testing
// logic and webextensions.
static void NotifyChange(Storage* aStorage, nsIPrincipal* aPrincipal,
const nsAString& aKey, const nsAString& aOldValue,
const nsAString& aNewValue,
const char16_t* aStorageType,
const nsAString& aDocumentURI, bool aIsPrivate,
bool aImmediateDispatch);
protected:
virtual ~Storage();
// The method checks whether the caller can use a storage.
bool CanUseStorage(nsIPrincipal& aSubjectPrincipal);
virtual void LastRelease() {}
private:
nsCOMPtr<nsPIDOMWindowInner> mWindow;
nsCOMPtr<nsIPrincipal> mPrincipal;
nsCOMPtr<nsIPrincipal> mStoragePrincipal;
// Whether storage is set to persist data only per session, may change
// dynamically and is set by CanUseStorage function that is called
// before any operation on the storage.
bool mIsSessionOnly : 1;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_Storage_h