1 files changed, 94 insertions, 0 deletions
diff --git a/dom/script/ShadowRealmGlobalScope.h b/dom/script/ShadowRealmGlobalScope.h
new file mode 100644
index 0000000000..cf7b2a3bd3
--- /dev/null
+++ b/dom/script/ShadowRealmGlobalScope.h
@@ -0,0 +1,94 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_ShadowRealmGlobalScope_h
+#define mozilla_dom_ShadowRealmGlobalScope_h
+
+#include "js/TypeDecls.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/OriginTrials.h"
+#include "mozilla/SchedulerGroup.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "nsContentUtils.h"
+#include "nsIGlobalObject.h"
+#include "nsWrapperCache.h"
+
+#include "js/loader/ModuleLoaderBase.h"
+
+namespace mozilla::dom {
+
+#define SHADOWREALMGLOBALSCOPE_IID                   \
+  { /* 1b0a59dd-c1cb-429a-bb90-cea17994dba2 */       \
+    0x1b0a59dd, 0xc1cb, 0x429a, {                    \
+      0xbb, 0x90, 0xce, 0xa1, 0x79, 0x94, 0xdb, 0xa2 \
+    }                                                \
+  }
+
+// Required for providing the wrapper, as this is the global used inside a Gecko
+// backed ShadowRealm, but also required to power module resolution.
+class ShadowRealmGlobalScope final : public nsIGlobalObject,
+                                     public nsWrapperCache {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(ShadowRealmGlobalScope)
+
+  NS_DECLARE_STATIC_IID_ACCESSOR(SHADOWREALMGLOBALSCOPE_IID)
+
+  explicit ShadowRealmGlobalScope(nsIGlobalObject* aCreatingGlobal)
+      : mCreatingGlobal(aCreatingGlobal){};
+
+  nsIGlobalObject* GetCreatingGlobal() const { return mCreatingGlobal; }
+  OriginTrials Trials() const override { return {}; }
+
+  JSObject* GetGlobalJSObject() override { return GetWrapper(); }
+  JSObject* GetGlobalJSObjectPreserveColor() const override {
+    return GetWrapperPreserveColor();
+  }
+
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override {
+    MOZ_CRASH("Shouldn't be here");
+    return nullptr;
+  }
+
+  JS::loader::ModuleLoaderBase* GetModuleLoader(JSContext* aCx) override;
+
+  bool ShouldResistFingerprinting(RFPTarget aTarget) const override {
+    return nsContentUtils::ShouldResistFingerprinting(
+        "Presently we don't have enough context to make an informed decision"
+        "on JS Sandboxes. See 1782853",
+        aTarget);
+  }
+
+  nsISerialEventTarget* SerialEventTarget() const final {
+    return mozilla::GetMainThreadSerialEventTarget();
+  }
+  nsresult Dispatch(already_AddRefed<nsIRunnable>&& aRunnable) const final {
+    return mozilla::SchedulerGroup::Dispatch(std::move(aRunnable));
+  }
+
+ private:
+  virtual ~ShadowRealmGlobalScope() = default;
+
+  RefPtr<JS::loader::ModuleLoaderBase> mModuleLoader;
+
+  // The global which created this ShadowRealm
+  nsCOMPtr<nsIGlobalObject> mCreatingGlobal;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(ShadowRealmGlobalScope,
+                              SHADOWREALMGLOBALSCOPE_IID)
+
+JSObject* NewShadowRealmGlobal(JSContext* aCx, JS::RealmOptions& aOptions,
+                               JSPrincipals* aPrincipals,
+                               JS::Handle<JSObject*> aGlobalObj);
+
+bool IsShadowRealmGlobal(JSObject* aObject);
+
+}  // namespace mozilla::dom
+
+#endif