gecko-dev/dom/storage/Storage.cpp

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4.2 KiB
C++

/* -*- 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 "Storage.h"
#include "StorageNotifierService.h"
#include "mozilla/dom/StorageBinding.h"
#include "nsIPrincipal.h"
#include "nsPIDOMWindow.h"
namespace mozilla {
namespace dom {
static const char kStorageEnabled[] = "dom.storage.enabled";
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Storage, mWindow, mPrincipal)
NS_IMPL_CYCLE_COLLECTING_ADDREF(Storage)
NS_IMPL_CYCLE_COLLECTING_RELEASE(Storage)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Storage)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMStorage)
NS_INTERFACE_MAP_ENTRY(nsIDOMStorage)
NS_INTERFACE_MAP_END
Storage::Storage(nsPIDOMWindowInner* aWindow, nsIPrincipal* aPrincipal)
: mWindow(aWindow)
, mPrincipal(aPrincipal)
, mIsSessionOnly(false)
{
MOZ_ASSERT(aPrincipal);
}
Storage::~Storage()
{}
/* static */ bool
Storage::StoragePrefIsEnabled()
{
return mozilla::Preferences::GetBool(kStorageEnabled);
}
bool
Storage::CanUseStorage(nsIPrincipal& aSubjectPrincipal)
{
// This method is responsible for correct setting of mIsSessionOnly.
if (!StoragePrefIsEnabled()) {
return false;
}
nsContentUtils::StorageAccess access =
nsContentUtils::StorageAllowedForPrincipal(Principal());
if (access == nsContentUtils::StorageAccess::eDeny) {
return false;
}
mIsSessionOnly = access <= nsContentUtils::StorageAccess::eSessionScoped;
return aSubjectPrincipal.Subsumes(mPrincipal);
}
/* virtual */ JSObject*
Storage::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return Storage_Binding::Wrap(aCx, this, aGivenProto);
}
namespace {
class StorageNotifierRunnable : public Runnable
{
public:
StorageNotifierRunnable(nsISupports* aSubject, const char16_t *aStorageType,
bool aPrivateBrowsing)
: Runnable("StorageNotifierRunnable")
, mSubject(aSubject)
, mStorageType(aStorageType)
, mPrivateBrowsing(aPrivateBrowsing)
{}
NS_IMETHOD
Run() override
{
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->NotifyObservers(mSubject,
mPrivateBrowsing
? "dom-private-storage2-changed"
: "dom-storage2-changed",
mStorageType);
}
return NS_OK;
}
private:
nsCOMPtr<nsISupports> mSubject;
const char16_t* mStorageType;
const bool mPrivateBrowsing;
};
} // namespace
/* static */ void
Storage::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)
{
StorageEventInit dict;
dict.mBubbles = false;
dict.mCancelable = false;
dict.mKey = aKey;
dict.mNewValue = aNewValue;
dict.mOldValue = aOldValue;
dict.mStorageArea = aStorage;
dict.mUrl = aDocumentURI;
// Note, this DOM event should never reach JS. It is cloned later in
// nsGlobalWindow.
RefPtr<StorageEvent> event =
StorageEvent::Constructor(nullptr, NS_LITERAL_STRING("storage"), dict);
event->SetPrincipal(aPrincipal);
// This will send the event to any registered window.
StorageNotifierService::Broadcast(event, aStorageType, aIsPrivate,
aImmediateDispatch);
// This runnable is mainly used by devtools. Windows receive notification by
// StorageNotifierService.
RefPtr<StorageNotifierRunnable> r =
new StorageNotifierRunnable(event, aStorageType, aIsPrivate);
if (aImmediateDispatch) {
Unused << r->Run();
} else {
SystemGroup::Dispatch(TaskCategory::Other, r.forget());
}
}
} // namespace dom
} // namespace mozilla