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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 "Storage.h"
#include "StorageNotifierService.h"
#include "mozilla/dom/StorageBinding.h"
#include "mozilla/dom/StorageEvent.h"
#include "mozilla/dom/StorageEventBinding.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/Preferences.h"
#include "mozilla/SchedulerGroup.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/StorageAccess.h"
#include "nsIObserverService.h"
#include "nsPIDOMWindow.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Storage, mWindow, mPrincipal,
mStoragePrincipal)
NS_IMPL_CYCLE_COLLECTING_ADDREF(Storage)
NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(Storage, LastRelease())
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Storage)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
Storage::Storage(nsPIDOMWindowInner* aWindow, nsIPrincipal* aPrincipal,
nsIPrincipal* aStoragePrincipal)
: mWindow(aWindow),
mPrincipal(aPrincipal),
mStoragePrincipal(aStoragePrincipal),
mPrivateBrowsing(false),
mSessionScopedOrLess(false) {
MOZ_ASSERT(aPrincipal);
if (mPrincipal->IsSystemPrincipal()) {
mPrivateBrowsing = false;
mSessionScopedOrLess = false;
} else if (mWindow) {
uint32_t rejectedReason = 0;
StorageAccess access = StorageAllowedForWindow(mWindow, &rejectedReason);
mPrivateBrowsing = access == StorageAccess::ePrivateBrowsing;
mSessionScopedOrLess = access <= StorageAccess::eSessionScoped;
}
}
Storage::~Storage() = default;
/* static */
bool Storage::StoragePrefIsEnabled() {
return StaticPrefs::dom_storage_enabled();
}
int64_t Storage::GetSnapshotUsage(nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv) {
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
return 0;
}
bool Storage::CanUseStorage(nsIPrincipal& aSubjectPrincipal) {
if (!StoragePrefIsEnabled()) {
return false;
}
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, u"storage"_ns, 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 {
SchedulerGroup::Dispatch(r.forget());
}
}
} // namespace mozilla::dom
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