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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 "nsGlobalWindowInner.h"
#include "nsIGlobalObject.h"
#include "xpcpublic.h"
#include "js/TypeDecls.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/ModuleLoader.h"
#include "mozilla/dom/ShadowRealmGlobalScope.h"
#include "mozilla/dom/ShadowRealmGlobalScopeBinding.h"
#include "js/loader/ModuleLoaderBase.h"
using namespace JS::loader;
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(ShadowRealmGlobalScope, mModuleLoader,
mCreatingGlobal)
NS_IMPL_CYCLE_COLLECTING_ADDREF(ShadowRealmGlobalScope)
NS_IMPL_CYCLE_COLLECTING_RELEASE(ShadowRealmGlobalScope)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ShadowRealmGlobalScope)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIGlobalObject)
NS_INTERFACE_MAP_ENTRY(ShadowRealmGlobalScope)
NS_INTERFACE_MAP_END
JSObject* NewShadowRealmGlobal(JSContext* aCx, JS::RealmOptions& aOptions,
JSPrincipals* aPrincipals,
JS::Handle<JSObject*> aGlobalObj) {
JS::Rooted<JSObject*> reflector(aCx);
{
RefPtr<ShadowRealmGlobalScope> scope;
GlobalObject global(aCx, aGlobalObj);
nsCOMPtr<nsIGlobalObject> nsGlobal =
do_QueryInterface(global.GetAsSupports());
MOZ_ASSERT(nsGlobal);
scope = new ShadowRealmGlobalScope(nsGlobal);
ShadowRealmGlobalScope_Binding::Wrap(aCx, scope, scope, aOptions,
aPrincipals, &reflector);
}
return reflector;
}
static nsIGlobalObject* FindEnclosingNonShadowRealmGlobal(
ShadowRealmGlobalScope* scope) {
nsCOMPtr<nsIGlobalObject> global = scope->GetCreatingGlobal();
do {
nsCOMPtr<ShadowRealmGlobalScope> shadowRealmGlobalScope =
do_QueryInterface(global);
if (!shadowRealmGlobalScope) {
break;
}
// Our global was a ShadowRealmGlobal; that's a problem, as we can't find a
// window or worker global associated with a ShadowRealmGlobal... so we
// continue following the chain.
//
// This will happen if you have nested ShadowRealms.
global = shadowRealmGlobalScope->GetCreatingGlobal();
} while (true);
return global;
}
ModuleLoaderBase* ShadowRealmGlobalScope::GetModuleLoader(JSContext* aCx) {
if (mModuleLoader) {
return mModuleLoader;
}
// Note: if this fails, we don't need to report an exception, as one will be
// reported by ModuleLoaderBase::GetCurrentModuleLoader.
// Don't bother asking the ShadowRealmGlobal itself for a host object to get a
// module loader from, instead, delegate to the enclosing global of the shadow
// realm
nsCOMPtr<nsIGlobalObject> global = FindEnclosingNonShadowRealmGlobal(this);
MOZ_RELEASE_ASSERT(global);
JSObject* object = global->GetGlobalJSObject();
MOZ_ASSERT(object);
// Currently Workers will never get here, because dynamic import is disabled
// in Worker context, and so importValue will throw before we get here.
//
// See https://bugzilla.mozilla.org/show_bug.cgi?id=1247687 and
// https://bugzilla.mozilla.org/show_bug.cgi?id=1772162
nsGlobalWindowInner* window = xpc::WindowGlobalOrNull(object);
if (!window) {
return nullptr;
}
RefPtr<Document> doc = window->GetExtantDoc();
if (!doc) {
return nullptr;
}
ScriptLoader* scriptLoader = doc->ScriptLoader();
mModuleLoader = new ModuleLoader(scriptLoader, this, ModuleLoader::Normal);
// Register the shadow realm module loader for tracing and ownership.
scriptLoader->RegisterShadowRealmModuleLoader(
static_cast<ModuleLoader*>(mModuleLoader.get()));
return mModuleLoader;
}
bool IsShadowRealmGlobal(JSObject* aObject) {
return IS_INSTANCE_OF(ShadowRealmGlobalScope, aObject);
}
} // namespace mozilla::dom
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