gecko-dev/dom/ipc/WindowGlobalActor.cpp

137 строки
4.2 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 "mozilla/dom/WindowGlobalActor.h"
#include "nsContentUtils.h"
#include "mozJSComponentLoader.h"
#include "mozilla/Logging.h"
#include "mozilla/dom/JSWindowActorService.h"
#include "mozilla/dom/JSWindowActorParent.h"
#include "mozilla/dom/JSWindowActorChild.h"
namespace mozilla {
namespace dom {
WindowGlobalInit WindowGlobalActor::AboutBlankInitializer(
dom::BrowsingContext* aBrowsingContext, nsIPrincipal* aPrincipal) {
MOZ_ASSERT(aBrowsingContext);
MOZ_ASSERT(aPrincipal);
nsCOMPtr<nsIURI> documentURI;
Unused << NS_NewURI(getter_AddRefs(documentURI), "about:blank");
uint64_t outerWindowId = nsContentUtils::GenerateWindowId();
uint64_t innerWindowId = nsContentUtils::GenerateWindowId();
return WindowGlobalInit(aPrincipal, documentURI, aBrowsingContext,
innerWindowId, outerWindowId);
}
void WindowGlobalActor::ConstructActor(const nsAString& aName,
JS::MutableHandleObject aActor,
ErrorResult& aRv) {
JSWindowActor::Type actorType = GetSide();
MOZ_ASSERT_IF(actorType == JSWindowActor::Type::Parent,
XRE_IsParentProcess());
// Constructing an actor requires a running script, so push an AutoEntryScript
// onto the stack.
AutoEntryScript aes(xpc::PrivilegedJunkScope(),
"WindowGlobalActor construction");
JSContext* cx = aes.cx();
RefPtr<JSWindowActorService> actorSvc = JSWindowActorService::GetSingleton();
if (!actorSvc) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
RefPtr<JSWindowActorProtocol> proto = actorSvc->GetProtocol(aName);
if (!proto) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
if (!proto->Matches(BrowsingContext(), GetDocumentURI(), GetRemoteType())) {
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
return;
}
// Load the module using mozJSComponentLoader.
RefPtr<mozJSComponentLoader> loader = mozJSComponentLoader::Get();
MOZ_ASSERT(loader);
JS::RootedObject global(cx);
JS::RootedObject exports(cx);
const JSWindowActorProtocol::Sided* side;
if (actorType == JSWindowActor::Type::Parent) {
side = &proto->Parent();
} else {
side = &proto->Child();
}
// Support basic functionally such as SendAsyncMessage and SendQuery for
// unspecified moduleURI.
if (!side->mModuleURI) {
RefPtr<JSWindowActor> actor;
if (actorType == JSWindowActor::Type::Parent) {
actor = new JSWindowActorParent();
} else {
actor = new JSWindowActorChild();
}
JS::Rooted<JS::Value> wrapper(cx);
if (!ToJSValue(cx, actor, &wrapper)) {
aRv.NoteJSContextException(cx);
return;
}
MOZ_ASSERT(wrapper.isObject());
aActor.set(&wrapper.toObject());
return;
}
aRv = loader->Import(cx, side->mModuleURI.ref(), &global, &exports);
if (aRv.Failed()) {
return;
}
MOZ_ASSERT(exports, "null exports!");
// Load the specific property from our module.
JS::RootedValue ctor(cx);
nsAutoString ctorName(aName);
ctorName.Append(actorType == JSWindowActor::Type::Parent
? NS_LITERAL_STRING("Parent")
: NS_LITERAL_STRING("Child"));
if (!JS_GetUCProperty(cx, exports, ctorName.get(), ctorName.Length(),
&ctor)) {
aRv.NoteJSContextException(cx);
return;
}
// Invoke the constructor loaded from the module.
if (!JS::Construct(cx, ctor, JS::HandleValueArray::empty(), aActor)) {
aRv.NoteJSContextException(cx);
return;
}
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WindowGlobalActor)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(WindowGlobalActor)
NS_IMPL_CYCLE_COLLECTING_ADDREF(WindowGlobalActor)
NS_IMPL_CYCLE_COLLECTING_RELEASE(WindowGlobalActor)
} // namespace dom
} // namespace mozilla