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/* -*- 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/JSWindowActorBinding.h"
#include "mozilla/dom/JSWindowActorParent.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/WindowGlobalParent.h"
#include "mozilla/dom/MessageManagerBinding.h"
namespace mozilla {
namespace dom {
JSWindowActorParent::~JSWindowActorParent() { MOZ_ASSERT(!mManager); }
nsIGlobalObject* JSWindowActorParent::GetParentObject() const {
return xpc::NativeGlobal(xpc::PrivilegedJunkScope());
}
JSObject* JSWindowActorParent::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return JSWindowActorParent_Binding::Wrap(aCx, this, aGivenProto);
}
WindowGlobalParent* JSWindowActorParent::GetManager() const { return mManager; }
void JSWindowActorParent::Init(const nsACString& aName,
WindowGlobalParent* aManager) {
MOZ_ASSERT(!mManager, "Cannot Init() a JSWindowActorParent twice!");
SetName(aName);
mManager = aManager;
InvokeCallback(CallbackFunction::ActorCreated);
}
namespace {
class AsyncMessageToChild : public Runnable {
public:
AsyncMessageToChild(const JSActorMessageMeta& aMetadata,
ipc::StructuredCloneData&& aData,
ipc::StructuredCloneData&& aStack,
WindowGlobalParent* aManager)
: mozilla::Runnable("WindowGlobalChild::HandleAsyncMessage"),
mMetadata(aMetadata),
mData(std::move(aData)),
mStack(std::move(aStack)),
mManager(aManager) {}
NS_IMETHOD Run() override {
MOZ_ASSERT(NS_IsMainThread(), "Should be called on the main thread.");
RefPtr<WindowGlobalChild> child = mManager->GetChildActor();
if (child) {
child->ReceiveRawMessage(mMetadata, std::move(mData), std::move(mStack));
}
return NS_OK;
}
private:
JSActorMessageMeta mMetadata;
ipc::StructuredCloneData mData;
ipc::StructuredCloneData mStack;
RefPtr<WindowGlobalParent> mManager;
};
} // anonymous namespace
void JSWindowActorParent::SendRawMessage(const JSActorMessageMeta& aMeta,
ipc::StructuredCloneData&& aData,
ipc::StructuredCloneData&& aStack,
ErrorResult& aRv) {
if (NS_WARN_IF(!mCanSend || !mManager || !mManager->CanSend())) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (mManager->IsInProcess()) {
nsCOMPtr<nsIRunnable> runnable = new AsyncMessageToChild(
aMeta, std::move(aData), std::move(aStack), mManager);
NS_DispatchToMainThread(runnable.forget());
return;
}
if (NS_WARN_IF(
!AllowMessage(aMeta, aData.DataLength() + aStack.DataLength()))) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return;
}
// Cross-process case - send data over WindowGlobalParent to other side.
ClonedMessageData msgData;
ClonedMessageData stackData;
RefPtr<BrowserParent> browserParent = mManager->GetBrowserParent();
ContentParent* cp = browserParent->Manager();
if (NS_WARN_IF(!aData.BuildClonedMessageDataForParent(cp, msgData)) ||
NS_WARN_IF(!aStack.BuildClonedMessageDataForParent(cp, stackData))) {
aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
return;
}
if (NS_WARN_IF(!mManager->SendRawMessage(aMeta, msgData, stackData))) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return;
}
}
CanonicalBrowsingContext* JSWindowActorParent::GetBrowsingContext(
ErrorResult& aRv) {
if (!mManager) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
return mManager->BrowsingContext();
}
void JSWindowActorParent::StartDestroy() {
JSActor::StartDestroy();
mCanSend = false;
}
void JSWindowActorParent::AfterDestroy() {
JSActor::AfterDestroy();
mManager = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(JSWindowActorParent, JSActor, mManager)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(JSWindowActorParent, JSActor)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSWindowActorParent)
NS_INTERFACE_MAP_END_INHERITING(JSActor)
NS_IMPL_ADDREF_INHERITED(JSWindowActorParent, JSActor)
NS_IMPL_RELEASE_INHERITED(JSWindowActorParent, JSActor)
} // namespace dom
} // namespace mozilla
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