gecko-dev/dom/storage/PartitionedLocalStorage.cpp

/* -*- 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 "PartitionedLocalStorage.h"
#include "SessionStorageCache.h"

#include "mozilla/dom/StorageBinding.h"

namespace mozilla {
namespace dom {

NS_IMPL_CYCLE_COLLECTION_INHERITED(PartitionedLocalStorage, Storage);

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PartitionedLocalStorage)
NS_INTERFACE_MAP_END_INHERITING(Storage)

NS_IMPL_ADDREF_INHERITED(PartitionedLocalStorage, Storage)
NS_IMPL_RELEASE_INHERITED(PartitionedLocalStorage, Storage)

PartitionedLocalStorage::PartitionedLocalStorage(nsPIDOMWindowInner* aWindow,
                                                 nsIPrincipal* aPrincipal)
  : Storage(aWindow, aPrincipal)
  , mCache(new SessionStorageCache())
{
}

PartitionedLocalStorage::~PartitionedLocalStorage()
{
}

int64_t
PartitionedLocalStorage::GetOriginQuotaUsage() const
{
  return mCache->GetOriginQuotaUsage(SessionStorageCache::eSessionSetType);
}

uint32_t
PartitionedLocalStorage::GetLength(nsIPrincipal& aSubjectPrincipal,
                                   ErrorResult& aRv)
{
  if (!CanUseStorage(aSubjectPrincipal)) {
    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
    return 0;
  }

  return mCache->Length(SessionStorageCache::eSessionSetType);
}

void
PartitionedLocalStorage::Key(uint32_t aIndex, nsAString& aResult,
                             nsIPrincipal& aSubjectPrincipal,
                             ErrorResult& aRv)
{
  if (!CanUseStorage(aSubjectPrincipal)) {
    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
    return;
  }

  mCache->Key(SessionStorageCache::eSessionSetType, aIndex, aResult);
}

void
PartitionedLocalStorage::GetItem(const nsAString& aKey, nsAString& aResult,
                                 nsIPrincipal& aSubjectPrincipal,
                                 ErrorResult& aRv)
{
  if (!CanUseStorage(aSubjectPrincipal)) {
    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
    return;
  }

  mCache->GetItem(SessionStorageCache::eSessionSetType, aKey, aResult);
}

void
PartitionedLocalStorage::GetSupportedNames(nsTArray<nsString>& aKeys)
{
  if (!CanUseStorage(*nsContentUtils::SubjectPrincipal())) {
    // return just an empty array
    aKeys.Clear();
    return;
  }

  mCache->GetKeys(SessionStorageCache::eSessionSetType, aKeys);
}

void
PartitionedLocalStorage::SetItem(const nsAString& aKey, const nsAString& aValue,
                                 nsIPrincipal& aSubjectPrincipal,
                                 ErrorResult& aRv)
{
  if (!CanUseStorage(aSubjectPrincipal)) {
    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
    return;
  }

  nsString oldValue;
  nsresult rv = mCache->SetItem(SessionStorageCache::eSessionSetType, aKey,
                                aValue, oldValue);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    aRv.Throw(rv);
    return;
  }

  if (rv == NS_SUCCESS_DOM_NO_OPERATION) {
    return;
  }
}

void
PartitionedLocalStorage::RemoveItem(const nsAString& aKey,
                                    nsIPrincipal& aSubjectPrincipal,
                                    ErrorResult& aRv)
{
  if (!CanUseStorage(aSubjectPrincipal)) {
    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
    return;
  }

  nsString oldValue;
  nsresult rv = mCache->RemoveItem(SessionStorageCache::eSessionSetType, aKey,
                                   oldValue);
  MOZ_ASSERT(NS_SUCCEEDED(rv));

  if (rv == NS_SUCCESS_DOM_NO_OPERATION) {
    return;
  }
}

void
PartitionedLocalStorage::Clear(nsIPrincipal& aSubjectPrincipal,
                               ErrorResult& aRv)
{
  uint32_t length = GetLength(aSubjectPrincipal, aRv);
  if (!length) {
    return;
  }

  mCache->Clear(SessionStorageCache::eSessionSetType);
}

bool
PartitionedLocalStorage::IsForkOf(const Storage* aOther) const
{
  MOZ_ASSERT(aOther);
  if (aOther->Type() != eLocalStorage) {
    return false;
  }

  return mCache == static_cast<const PartitionedLocalStorage*>(aOther)->mCache;
}

} // dom namespace
} // mozilla namespace