Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #include "Storage.h"
       8             : #include "StorageNotifierService.h"
       9             : 
      10             : #include "mozilla/dom/StorageBinding.h"
      11             : #include "nsIPrincipal.h"
      12             : #include "nsPIDOMWindow.h"
      13             : 
      14             : namespace mozilla {
      15             : namespace dom {
      16             : 
      17           0 : NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Storage, mWindow, mPrincipal)
      18             : 
      19           4 : NS_IMPL_CYCLE_COLLECTING_ADDREF(Storage)
      20           3 : NS_IMPL_CYCLE_COLLECTING_RELEASE(Storage)
      21             : 
      22           2 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Storage)
      23           2 :   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
      24           2 :   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMStorage)
      25           2 :   NS_INTERFACE_MAP_ENTRY(nsIDOMStorage)
      26           0 : NS_INTERFACE_MAP_END
      27             : 
      28           1 : Storage::Storage(nsPIDOMWindowInner* aWindow, nsIPrincipal* aPrincipal)
      29             :   : mWindow(aWindow)
      30             :   , mPrincipal(aPrincipal)
      31           1 :   , mIsSessionOnly(false)
      32             : {
      33           1 :   MOZ_ASSERT(aPrincipal);
      34           1 : }
      35             : 
      36           0 : Storage::~Storage()
      37           0 : {}
      38             : 
      39             : bool
      40           0 : Storage::CanUseStorage(nsIPrincipal& aSubjectPrincipal)
      41             : {
      42             :   // This method is responsible for correct setting of mIsSessionOnly.
      43           0 :   if (!mozilla::Preferences::GetBool(kStorageEnabled)) {
      44           0 :     return false;
      45             :   }
      46             : 
      47             :   nsContentUtils::StorageAccess access =
      48           0 :     nsContentUtils::StorageAllowedForPrincipal(Principal());
      49             : 
      50           0 :   if (access == nsContentUtils::StorageAccess::eDeny) {
      51           0 :     return false;
      52             :   }
      53             : 
      54           0 :   mIsSessionOnly = access <= nsContentUtils::StorageAccess::eSessionScoped;
      55             : 
      56           0 :   return aSubjectPrincipal.Subsumes(mPrincipal);
      57             : }
      58             : 
      59             : /* virtual */ JSObject*
      60           0 : Storage::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
      61             : {
      62           0 :   return StorageBinding::Wrap(aCx, this, aGivenProto);
      63             : }
      64             : 
      65             : namespace {
      66             : 
      67           0 : class StorageNotifierRunnable : public Runnable
      68             : {
      69             : public:
      70           0 :   StorageNotifierRunnable(nsISupports* aSubject, const char16_t *aStorageType,
      71             :                           bool aPrivateBrowsing)
      72           0 :     : Runnable("StorageNotifierRunnable")
      73             :     , mSubject(aSubject)
      74             :     , mStorageType(aStorageType)
      75           0 :     , mPrivateBrowsing(aPrivateBrowsing)
      76           0 :   {}
      77             : 
      78             :   NS_IMETHOD
      79           0 :   Run() override
      80             :   {
      81             :     nsCOMPtr<nsIObserverService> observerService =
      82           0 :       mozilla::services::GetObserverService();
      83           0 :     if (observerService) {
      84           0 :       observerService->NotifyObservers(mSubject,
      85           0 :                                        mPrivateBrowsing
      86             :                                          ? "dom-private-storage2-changed"
      87             :                                          : "dom-storage2-changed",
      88           0 :                                        mStorageType);
      89             :     }
      90           0 :     return NS_OK;
      91             :   }
      92             : 
      93             : private:
      94             :   nsCOMPtr<nsISupports> mSubject;
      95             :   const char16_t* mStorageType;
      96             :   const bool mPrivateBrowsing;
      97             : };
      98             : 
      99             : } // namespace
     100             : 
     101             : /* static */ void
     102           0 : Storage::NotifyChange(Storage* aStorage, nsIPrincipal* aPrincipal,
     103             :                       const nsAString& aKey,
     104             :                       const nsAString& aOldValue, const nsAString& aNewValue,
     105             :                       const char16_t* aStorageType,
     106             :                       const nsAString& aDocumentURI, bool aIsPrivate,
     107             :                       bool aImmediateDispatch)
     108             : {
     109           0 :   StorageEventInit dict;
     110           0 :   dict.mBubbles = false;
     111           0 :   dict.mCancelable = false;
     112           0 :   dict.mKey = aKey;
     113           0 :   dict.mNewValue = aNewValue;
     114           0 :   dict.mOldValue = aOldValue;
     115           0 :   dict.mStorageArea = aStorage;
     116           0 :   dict.mUrl = aDocumentURI;
     117             : 
     118             :   // Note, this DOM event should never reach JS. It is cloned later in
     119             :   // nsGlobalWindow.
     120             :   RefPtr<StorageEvent> event =
     121           0 :     StorageEvent::Constructor(nullptr, NS_LITERAL_STRING("storage"), dict);
     122             : 
     123           0 :   event->SetPrincipal(aPrincipal);
     124             : 
     125             :   // This will send the event to any registered window.
     126           0 :   StorageNotifierService::Broadcast(event, aStorageType, aIsPrivate,
     127           0 :                                     aImmediateDispatch);
     128             : 
     129             :   // This runnable is mainly used by devtools. Windows receive notification by
     130             :   // StorageNotifierService.
     131             : 
     132             :   RefPtr<StorageNotifierRunnable> r =
     133           0 :     new StorageNotifierRunnable(event, aStorageType, aIsPrivate);
     134             : 
     135           0 :   if (aImmediateDispatch) {
     136           0 :     Unused << r->Run();
     137             :   } else {
     138           0 :     SystemGroup::Dispatch("Storage::NotifyChange", TaskCategory::Other,
     139           0 :                           r.forget());
     140             :   }
     141           0 : }
     142             : 
     143             : } // namespace dom
     144             : } // namespace mozilla