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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/. */
#include "LocalStorage.h"
#include "LocalStorageCache.h"
#include "LocalStorageManager.h"
#include "StorageUtils.h"
#include "nsIPrincipal.h"
#include "mozilla/dom/PermissionMessageUtils.h"
#include "mozilla/dom/StorageBinding.h"
#include "mozilla/dom/StorageEvent.h"
#include "mozilla/dom/StorageEventBinding.h"
#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/ipc/PBackgroundChild.h"
#include "mozilla/Preferences.h"
#include "mozilla/EnumSet.h"
#include "nsThreadUtils.h"
#include "nsContentUtils.h"
#include "nsServiceManagerUtils.h"
namespace mozilla {
using namespace ipc;
namespace dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(LocalStorage)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(LocalStorage, Storage)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mManager)
NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_REFERENCE
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(LocalStorage, Storage)
CycleCollectionNoteChild(
cb, NS_ISUPPORTS_CAST(nsIDOMStorageManager*, tmp->mManager.get()),
"mManager");
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(LocalStorage)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_END_INHERITING(Storage)
NS_IMPL_ADDREF_INHERITED(LocalStorage, Storage)
NS_IMPL_RELEASE_INHERITED(LocalStorage, Storage)
LocalStorage::LocalStorage(nsPIDOMWindowInner* aWindow,
LocalStorageManager* aManager,
LocalStorageCache* aCache,
const nsAString& aDocumentURI,
nsIPrincipal* aPrincipal,
nsIPrincipal* aStoragePrincipal, bool aIsPrivate)
: Storage(aWindow, aPrincipal, aStoragePrincipal),
mManager(aManager),
mCache(aCache),
mDocumentURI(aDocumentURI),
mIsPrivate(aIsPrivate) {
mCache->Preload();
}
LocalStorage::~LocalStorage() = default;
int64_t LocalStorage::GetOriginQuotaUsage() const {
return mCache->GetOriginQuotaUsage(this);
}
uint32_t LocalStorage::GetLength(nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv) {
if (!CanUseStorage(aSubjectPrincipal)) {
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return 0;
}
uint32_t length;
aRv = mCache->GetLength(this, &length);
return length;
}
void LocalStorage::Key(uint32_t aIndex, nsAString& aResult,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
if (!CanUseStorage(aSubjectPrincipal)) {
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
aRv = mCache->GetKey(this, aIndex, aResult);
}
void LocalStorage::GetItem(const nsAString& aKey, nsAString& aResult,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
if (!CanUseStorage(aSubjectPrincipal)) {
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
aRv = mCache->GetItem(this, aKey, aResult);
}
void LocalStorage::SetItem(const nsAString& aKey, const nsAString& aData,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
if (!CanUseStorage(aSubjectPrincipal)) {
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
nsString data;
bool ok = data.Assign(aData, fallible);
if (!ok) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
nsString old;
aRv = mCache->SetItem(this, aKey, data, old);
if (aRv.Failed()) {
return;
}
if (!aRv.ErrorCodeIs(NS_SUCCESS_DOM_NO_OPERATION)) {
OnChange(aKey, old, aData);
}
}
void LocalStorage::RemoveItem(const nsAString& aKey,
nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv) {
if (!CanUseStorage(aSubjectPrincipal)) {
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
nsAutoString old;
aRv = mCache->RemoveItem(this, aKey, old);
if (aRv.Failed()) {
return;
}
if (!aRv.ErrorCodeIs(NS_SUCCESS_DOM_NO_OPERATION)) {
OnChange(aKey, old, VoidString());
}
}
void LocalStorage::Clear(nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
if (!CanUseStorage(aSubjectPrincipal)) {
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
aRv = mCache->Clear(this);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
if (!aRv.ErrorCodeIs(NS_SUCCESS_DOM_NO_OPERATION)) {
OnChange(VoidString(), VoidString(), VoidString());
}
}
void LocalStorage::OnChange(const nsAString& aKey, const nsAString& aOldValue,
const nsAString& aNewValue) {
NotifyChange(/* aStorage */ this, StoragePrincipal(), aKey, aOldValue,
aNewValue, /* aStorageType */ u"localStorage", mDocumentURI,
mIsPrivate, /* aImmediateDispatch */ false);
}
void LocalStorage::ApplyEvent(StorageEvent* aStorageEvent) {
MOZ_ASSERT(aStorageEvent);
nsAutoString key;
nsAutoString old;
nsAutoString value;
aStorageEvent->GetKey(key);
aStorageEvent->GetNewValue(value);
// No key means clearing the full storage.
if (key.IsVoid()) {
MOZ_ASSERT(value.IsVoid());
mCache->Clear(this, LocalStorageCache::E10sPropagated);
return;
}
// No new value means removing the key.
if (value.IsVoid()) {
mCache->RemoveItem(this, key, old, LocalStorageCache::E10sPropagated);
return;
}
// Otherwise, we set the new value.
mCache->SetItem(this, key, value, old, LocalStorageCache::E10sPropagated);
}
void LocalStorage::GetSupportedNames(nsTArray<nsString>& aKeys) {
if (!CanUseStorage(*nsContentUtils::SubjectPrincipal())) {
// return just an empty array
aKeys.Clear();
return;
}
mCache->GetKeys(this, aKeys);
}
bool LocalStorage::IsForkOf(const Storage* aOther) const {
MOZ_ASSERT(aOther);
if (aOther->Type() != eLocalStorage) {
return false;
}
return mCache == static_cast<const LocalStorage*>(aOther)->mCache;
}
} // namespace dom
} // namespace mozilla