dom/script/ShadowRealmGlobalScope.h

   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 #ifndef mozilla_dom_ShadowRealmGlobalScope_h
   8 #define mozilla_dom_ShadowRealmGlobalScope_h
   9
  10 #include "js/TypeDecls.h"
  11 #include "mozilla/Attributes.h"
  12 #include "mozilla/Maybe.h"
  13 #include "mozilla/OriginTrials.h"
  14 #include "mozilla/SchedulerGroup.h"
  15 #include "mozilla/dom/BindingDeclarations.h"
  16 #include "nsContentUtils.h"
  17 #include "nsIGlobalObject.h"
  18 #include "nsWrapperCache.h"
  19
  20 #include "js/loader/ModuleLoaderBase.h"
  21
  22 namespace mozilla::dom {
  23
  24 #define SHADOWREALMGLOBALSCOPE_IID                   \
  25   { /* 1b0a59dd-c1cb-429a-bb90-cea17994dba2 */       \
  26     0x1b0a59dd, 0xc1cb, 0x429a, {                    \
  27       0xbb, 0x90, 0xce, 0xa1, 0x79, 0x94, 0xdb, 0xa2 \
  28     }                                                \
  29   }
  30
  31 // Required for providing the wrapper, as this is the global used inside a Gecko
  32 // backed ShadowRealm, but also required to power module resolution.
  33 class ShadowRealmGlobalScope final : public nsIGlobalObject,
  34                                      public nsWrapperCache {
  35  public:
  36   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  37   NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(ShadowRealmGlobalScope)
  38
  39   NS_DECLARE_STATIC_IID_ACCESSOR(SHADOWREALMGLOBALSCOPE_IID)
  40
  41   explicit ShadowRealmGlobalScope(nsIGlobalObject* aCreatingGlobal)
  42       : mCreatingGlobal(aCreatingGlobal) {};
  43
  44   nsIGlobalObject* GetCreatingGlobal() const { return mCreatingGlobal; }
  45   OriginTrials Trials() const override { return {}; }
  46
  47   JSObject* GetGlobalJSObject() override { return GetWrapper(); }
  48   JSObject* GetGlobalJSObjectPreserveColor() const override {
  49     return GetWrapperPreserveColor();
  50   }
  51
  52   virtual JSObject* WrapObject(JSContext* aCx,
  53                                JS::Handle<JSObject*> aGivenProto) override {
  54     MOZ_CRASH("Shouldn't be here");
  55     return nullptr;
  56   }
  57
  58   JS::loader::ModuleLoaderBase* GetModuleLoader(JSContext* aCx) override;
  59
  60   bool ShouldResistFingerprinting(RFPTarget aTarget) const override {
  61     return nsContentUtils::ShouldResistFingerprinting(
  62         "Presently we don't have enough context to make an informed decision"
  63         "on JS Sandboxes. See 1782853",
  64         aTarget);
  65   }
  66
  67   nsISerialEventTarget* SerialEventTarget() const final {
  68     return mozilla::GetMainThreadSerialEventTarget();
  69   }
  70   nsresult Dispatch(already_AddRefed<nsIRunnable>&& aRunnable) const final {
  71     return mozilla::SchedulerGroup::Dispatch(std::move(aRunnable));
  72   }
  73
  74  private:
  75   virtual ~ShadowRealmGlobalScope() = default;
  76
  77   RefPtr<JS::loader::ModuleLoaderBase> mModuleLoader;
  78
  79   // The global which created this ShadowRealm
  80   nsCOMPtr<nsIGlobalObject> mCreatingGlobal;
  81 };
  82
  83 NS_DEFINE_STATIC_IID_ACCESSOR(ShadowRealmGlobalScope,
  84                               SHADOWREALMGLOBALSCOPE_IID)
  85
  86 JSObject* NewShadowRealmGlobal(JSContext* aCx, JS::RealmOptions& aOptions,
  87                                JSPrincipals* aPrincipals,
  88                                JS::Handle<JSObject*> aGlobalObj);
  89
  90 bool IsShadowRealmGlobal(JSObject* aObject);
  91
  92 }  // namespace mozilla::dom
  93
  94 #endif